Regulation No. 83

Uniform provisions concerning the approval of vehicles with regard to the emission of pollutants according to engine fuel requirements

Contents

1. Scope......................................................... 6

2. Definitions..................................................... 6

3. Application for approval............................................ 10

4. Approval...................................................... 12

5. Specifications and tests............................................. 14

6. Modifications of the vehicle type....................................... 26

7. Extensions to type approvals.......................................... 26

8. Conformity of production (COP)....................................... 29

9. In-service conformity.............................................. 33

10. Penalties for non-conformity of production................................ 37

11. Production definitely discontinued...................................... 37

12. Transitional provisions............................................. 37

13. Names and addresses of Technical Services responsible

for conducting approval tests, and of Administrative Departments................. 37

Appendix

1. Procedure for verifying the conformity of production requirements if

the production standard deviation given by the manufacturer is satisfactory........... 38

2. Procedure for verifying the conformity of production requirements if

the production standard deviation given by the manufacturer is either

not satisfactory or not available........................................ 40

3. In-service conformity check.......................................... 43

4. Statistical procedure for in-service conformity testing......................... 47

5. Responsibilities for in-service conformity................................. 53

6. Requirements for vehicles that use a reagent for the exhaust after-treatment system...... 54

Annexes

1. Engine and vehicle characteristics and information concerning
the conduct of tests................................................ 59

Appendix 1: Information on test condition................................. 72

2. Communication.................................................. 74

Appendix 1: OBD related information................................... 80

Appendix 2: Manufacturer’s certificate of compliance with the OBD
in-use performance requirements.............................. 81

Annexes

3. Arrangements of the approval mark..................................... 82

4a. Type I Test
(Verifying exhaust emissions after a cold start).............................. 84

1. Applicability

2. Introduction

3. Test conditions

4. Test equipment

5. Determination of vehicle road load

6. Emissions test procedure

Appendix 1: Chassis dynamometer system.......................... 107

1. Specification

2. Dynamometer calibration procedure

3. Verification of the load curve

Appendix 2: Exhaust dilution system.............................. 111

1. System specification

2. CVS Calibration procedure

3. System verification procedure

Appendix 3: Gaseous emissions measurement equipment................. 122

1. Specification

2. Calibration procedures

3. Reference gases

Appendix 4: Particulate mass emissions measurement equipment............ 130

1. Specification

2. Calibration and verification procedures

Appendix 5: Particle number emissions measurement equipment............ 136

1. Specification

2. Calibration/validation of the particle sampling system

Appendix 6: Verification of simulated inertia......................... 144

1. Object

2. Principle

3. Specification

4. Verification procedure

Appendix 7: Measurement of vehicle road load....................... 146

1. Object of the methods

2. Definition of the road

3. Atmospheric conditions

4. Vehicle preparation

5. Methods

5. Type II Test
(Carbon monoxide emission test at idling speed)............................ 152

6. Type III Test
(Verifying emissions of crankcase gases)................................. 155

Annexes

7. Type IV Test
(Determination of evaporative emissions from vehicles

with positive-ignition engines......................................... 158

Appendix 1: Calibration of equipment for evaporative emission testing............ 171

Appendix 2: .................................................. 176

8. Type VI Test
(Verifying the average exhaust emissions of carbon monoxide and hydrocarbons
after a cold start at low ambient temperature)............................... 177

9. Type V Test

(Description of the endurance test for verifying the durability

of pollution control devices).......................................... 184

Appendix 1: Standard Bench Cycle (SBC)................................ 192

Appendix 2: Standard Diesel Bench Cycle (SDBC).......................... 197

Appendix 3: Standard Road Cycle (SRC)................................ 198

10. Specifications of reference fuels....................................... 201

1. Specifications of reference fuels for testing vehicles to the emission limits

1.1. Technical data on the reference fuel to be used for testing vehicles equipped

with positive-ignition engines

1.2. Technical data on the reference fuel to be used for testing vehicles equipped
with diesel engine

2. Specifications of reference fuels to be used for testing vehicles equipped with
positive-ignition engines at low ambient temperature - Type VI Test

10a. Specifications of gaseous reference fuels.................................. 207

1. Specifications of gaseous reference fuels

1.1. Technical data of the LPG reference fuels used for testing vehicles to the emission
limits given in Table 1 in paragraph 5.3.1.4. – Type I Test

11. On-Board diagnostics (OBD) for motor vehicles............................. 208

Appendix 1: Functional aspects of on-board diagnostic (OBD) systems............ 219

Appendix 2: Essential characteristics of the vehicle family.................... 229

12. Granting of an ECE type approval for a vehicle fuelled by LPG or NG/biomethane...... 230

13. Emissions test procedure for a vehicle equipped with a periodically regenerating system.. 233

14. Emissions test procedure for hybrid electric vehicles (HEV)..................... 240

Appendix 1: Electrical energy/power storage device State Of Charge (SOC) profile

for OVC HEV Type I Test................................ 253

1. Scope

This Regulation establishes technical requirements for the type approval of motor vehicles.

In addition, this Regulation lays down rules for in-service conformity, durability of pollution control devices and on-board diagnostic (OBD) systems.

1.1. This Regulation shall apply to vehicles of categories M1, M2, N1 and N2 with a reference mass not exceeding 2,610 kg [1].

At the manufacturer's request, type approval granted under this Regulation may be extended from vehicles mentioned above to M1, M2, N1 and N2 vehicles with a reference mass not exceeding 2,840 kg and which meet the conditions laid down in this Regulation.

2. Definitions

For the purposes of this Regulation the following definitions shall apply:

2.1. "Vehicle type" means a group of vehicles that do not differ in the following respects:

2.1.1. The equivalent inertia determined in relation to the reference mass as prescribed in Annex 4a, Table 3; and

2.1.2. The engine and vehicle characteristics as defined in Annex 1;

2.2. "Reference mass" means the "unladen mass" of the vehicle increased by a uniform figure of 100 kg for test according to Annexes 4a and 8;

2.2.1. "Unladen mass" means the mass of the vehicle in running order without the uniform mass of the driver of 75 kg, passengers or load, but with the fuel tank 90 per cent full and the usual set of tools and spare wheel on board, where applicable;

2.2.2. "Running order mass" means the mass described in Paragraph 2.6. of Annex 1 to this Regulation and for vehicles designed and constructed for the carriage of more than 9 persons (in addition to the driver), the mass of a crew member (75 kg), if there is a crew seat amongst the nine or more seats.

2.3. "Maximum mass" means the technically permissible maximum mass declared by the vehicle manufacturer (this mass may be greater than the maximum mass authorised by the national administration);

2.4. "Gaseous pollutants" means the exhaust gas emissions of carbon monoxide, oxides of nitrogen expressed in nitrogen dioxide (NO2) equivalent and hydrocarbons assuming ratio of:

(a) C1H2.525 for liquefied petroleum gas (LPG)

(b) C1H4 for natural gas (NG) and biomethane

(d) C1H1.86O0.005 for diesel (B5)

(e) C1H2.74O0.385 for ethanol (E85)

2.5. "Particulate pollutants" means components of the exhaust gas which are removed from the diluted exhaust gas at a maximum temperature of 325 K (52 °C) by means of the filters described in Annex 4a; Appendix 4.

2.5.1. "Particle numbers" means the total number of particles of a diameter greater than 23 nm diameter present in the diluted exhaust gas after it has been conditioned to remove volatile material, as described in Annex 4a, Appendix 5.

2.6. "Exhaust emissions" means

• For positive-ignition (P.I.) engines, emissions of gaseous and particulate pollutants;

• For compression-ignition (C.I.) engines, emissions of gaseous pollutants, particulate pollutants and particle numbers;

2.7. "Evaporative emissions" means the hydrocarbon vapours lost from the fuel system of a motor vehicle other than those from exhaust emissions;

2.7.1. "Tank breathing losses" are hydrocarbon emissions caused by temperature changes in the fuel tank (assuming a ratio of C1H2.33).

2.7.2. "Hot soak losses" are hydrocarbon emissions arising from the fuel system of a stationary vehicle after a period of driving (assuming a ratio of C1 H2.20 );

2.8. "Engine crankcase" means the spaces in or external to an engine which are connected to the oil sump by internal or external ducts through which gases and vapour can escape;

2.9. "Cold start device" means a device that temporarily enriches the air/fuel mixture of the engine thus assisting the engine to start;

2.10. "Starting aid" means a device which assists engine start up without enrichment of the air/fuel mixture of the engine, e.g. glow plug, injection timing change, etc.;

2.11. "Engine capacity" means:

2.11.1. For reciprocating piston engines, the nominal engine swept volume;

2.11.2. For rotary piston engines (Wankel), twice the nominal swept volume of a combustion chamber per piston;

2.12. "Pollution control devices" means those components of a vehicle that control and/or limit exhaust and evaporative emissions.

2.13. "OBD" means an on-board diagnostic system for emission control, which has the capability of identifying the likely area of malfunction by means of fault codes stored in computer memory;

2.14. "In-service test" means the test and evaluation of conformity conducted in accordance with paragraph 9.2.1 of this Regulation;

2.15. "Properly maintained and used" means, for the purpose of a test vehicle, that such a vehicle satisfies the criteria for acceptance of a selected vehicle laid down in paragraph 2. of Appendix 3 to this Regulation;

2.16. "Defeat device" means any element of design which senses temperature, vehicle speed, engine rotational speed, transmission gear, manifold vacuum or any other parameter for the purpose of activating, modulating, delaying or deactivating the operation of any part of the emission control system, that reduces the effectiveness of the emission control system under conditions which may reasonably be expected to be encountered in normal vehicle operation and use. Such an element of design may not be considered a defeat device if:

2.16.1. The need for the device is justified in terms of protecting the engine against damage or accident and for safe operation of the vehicle; or

2.16.2. The device does not function beyond the requirements of engine starting; or

2.16.3. Conditions are substantially included in the Type I or Type VI test procedures.

2.17. "Family of vehicles" means a group of vehicle types identified by a parent vehicle for the purpose of Annex 12;

2.18. "Fuel requirement by the engine" means the type of fuel normally used by the engine:

(a) Petrol E5);

(b) LPG (liquefied petroleum gas);

(d) Either petrol (E5) or LPG;

(e) Either petrol (E5) or NG/biomethane;

(f) Diesel fuel B5);

(g) Mixture of ethanol (E85) and petrol (E5) (Flex fuel)

(h) Mixture of biodiesel and diesel (B5) (Flex fuel)

(i) Hydrogen

(j) Either petrol (E5) or Hydrogen (Bi-fuel)

2.18.1. "Biofuel" means liquid or gaseous fuel for transport, produced from biomass.

2.19. "Approval of a vehicle" means the approval of a vehicle type with regard to the limitation of the following conditions [2]:

2.19.1. Limitation of exhaust emissions by the vehicle, evaporative emissions, crankcase emissions, durability of pollution control devices, cold start pollutant emissions and on-board diagnostics of vehicles fuelled with unleaded petrol, or which can be fuelled with either unleaded petrol and LPG or NG/biomethane or biofuels (Approval B);

2.19.2. Limitation of emissions of gaseous and particulate pollutants, durability of pollution control devices and on-board diagnostics of vehicles fuelled with diesel fuel (Approval C) or which can be fuelled with either diesel fuel and biosuel or biofuel;

2.19.3. Limitation of emissions of gaseous pollutants by the engine, crankcase emissions, durability of pollution control devices, cold start emissions and on-board diagnostics of vehicles fuelled with LPG or NG/biomethane (Approval D);

2.20. "Periodically regenerating system" means an anti-pollution device (e.g. catalytic converter, particulate trap) that requires a periodical regeneration process in less than 4,000 km of normal vehicle operation. During cycles where regeneration occurs, emission standards can be exceeded. If a regeneration of an anti-pollution device occurs at least once per Type I test and that has already regenerated at least once during vehicle preparation cycle, it will be considered as a continuously regenerating system which does not require a special test procedure. Annex 13 does not apply to continuously regenerating systems.

At the request of the manufacturer, the test procedure specific to periodically regenerating systems will not apply to a regenerative device if the manufacturer provides data to the type Approval Authority that, during cycles where regeneration occurs, emissions remain below the standards given in paragraph 5.3.1.4. applied for the concerned vehicle category after agreement of the Technical Service.

2.21. Hybrid vehicles (HV)

2.21.1. General definition of hybrid vehicles (HV):

"Hybrid vehicle (HV)" means a vehicle with at least two different energy converters and two different energy storage systems (on vehicle) for the purpose of vehicle propulsion.

2.21.2. Definition of hybrid electric vehicles (HEV):

"Hybrid electric vehicle (HEV)" means a vehicle that, for the purpose of mechanical propulsion, draws energy from both of the following on-vehicle sources of stored energy/power:

a) A consumable fuel;

b) An electrical energy/power storage device (e.g.: battery, capacitor, flywheel/generator etc.).

2.22. "Mono-fuel vehicle" means a vehicle that is designed to run primarily on one type of fuel;

2.22.1 "Mono-fuel gas vehicle" means a vehicle that is designed primarily for permanent running on LPG or NG/biomethane or hydrogen, but may also have a petrol system for emergency purposes or starting only, where the petrol tank does not contain more than 15 litres of petrol.

2.23. "Bi-fuel vehicle" means a vehicle with two separate fuel storage systems that can run part-time on two different fuels and is designed to run on only one fuel at a time.

2.23.1. "Bi-fuel gas vehicle" means a bi fuel vehicle that can run on petrol and also on either LPG, NG/biomethane or hydrogen.

2.24. "Alternative fuel vehicle" means a vehicle designed to be capable of running on at least one type of fuel that is either gaseous at atmospheric temperature and pressure, or substantially non-mineral oil derived.

2.25. "Flex fuel vehicle" means a vehicle with one fuel storage system that can run on different mixtures of two or more fuels.

2.25.1. "Flex fuel ethanol vehicle" means a flex fuel vehicle that can run on petrol or a mixture of petrol and ethanol up to an 85 per cent ethanol blend (E85).

2.25.2. "Flex fuel biodiesel vehicle" means a flex fuel vehicle that can run on mineral diesel or a mixture of mineral diesel and biodiesel.

2.26. "Vehicles designed to fulfil specific social needs" means diesel vehicles of category M1 which are either:

(a) Special purpose vehicles with reference mass exceeding 2,000 kg [3];

(b) Vehicles with a reference mass exceeding 2,000 kg and designed to carry seven or more occupants including the driver with the exclusion, as from 1 September 2012, of vehicles of category M1G3;

(c) Vehicles with a reference mass exceeding 1,760 kg which are built specifically for commercial purposes to accommodate wheelchair use inside the vehicle.

3. Application for approval

3.1. The application for approval of a vehicle type with regard to exhaust emissions, crankcase emissions, evaporative emissions and durability of pollution control devices, as well as to its on-board diagnostic (OBD) system shall be submitted by the vehicle manufacturer or by his authorized representative to the Approval Authority.

3.1.1. In addition, the manufacturer shall submit the following information:

(a) In the case of vehicles equipped with positive-ignition engines, a declaration by the manufacturer of the minimum percentage of misfires out of a total number of firing events that would either result in emissions exceeding the limits given in paragraph 3.3.2. of Annex 11, if that percentage of misfire had been present from the start of a Type I test as described in Annex 4a to this Regulation, or that could lead to an exhaust catalyst, or catalysts, overheating prior to causing irreversible damage;

(b) Detailed written information fully describing the functional operation characteristics of the OBD system, including a listing of all relevant parts of the emission control system of the vehicle that are monitored by the OBD system;

(c) A description of the malfunction indicator used by the OBD system to signal the presence of a fault to a driver of the vehicle;

(d) A declaration by the manufacturer that the OBD system complies with the provisions of paragraph 7. of Appendix 1 to Annex 11 relating to in-use performance under all reasonably foreseeable driving conditions;

(e) A plan describing the detailed technical criteria and justification for incrementing the numerator and denominator of each monitor that shall fulfil the requirements of paragraphs 7.2. and 7.3. of Appendix 1 to Annex 11, as well as for disabling numerators, denominators and the general denominator under the conditions outlined in paragraph 7.7. of Appendix 1 to Annex XI;

(f) A description of the provisions taken to prevent tampering with and modification of the emission control computer;

(g) If applicable, the particulars of the vehicle family as referred to in Appendix 2 to Annex 11;

h) Where appropriate, copies of other type approvals with the relevant data to enable extension of approvals and establishment of deterioration factors.

3.1.2. For the tests described in paragraph 3. of Annex 11, a vehicle representative of the vehicle type or vehicle family fitted with the OBD system to be approved shall be submitted to the Technical Service responsible for the type approval test. Il the Technical Service determines that the submitted vehicle does not fully represent the vehicle type or vehicle family described in Annex 11, Appendix 2, an alternative and if necessary an additional vehicle shall be submitted for test in accordance with paragraph 3. of Annex.11.

3.2. A model of the information document relating to exhaust emissions, evaporative emissions, durability and the on-board diagnostic (OBD) system is given in Annex 1. The information mentioned under paragraph 3.2.12.2.7.6. of Annex 1 is to be included in Appendix 1 "OBD - RELATED INFORMATION" to the type-approval communication given in Annex 2.

3.2.1. Where appropriate, copies of other type approvals with the relevant data to enable extensions of approvals and establishment of deterioration factors shall be submitted.

3.3. For the tests described in paragraph 5. of this Regulation a vehicle representative of the vehicle type to be approved shall be submitted to the Technical Service responsible for the approval tests.

3.4.1. The application referred to in paragraph 3.1. shall be drawn up in accordance with the model of the information document set out in Annex 1.

3.4.2. For the purposes of paragraph 3.1.1.(d), the manufacturer shall use the model of a manufacturer's certificate of compliance with the OBD in-use performance requirements set out in Appendix 2 of Annex 2.

3.4.3. For the purposes of paragraph 3.1.1.(e), the Approval Authority that grants the approval shall make the information referred to in that point available to the approval authorities upon request.

3.4.5. For the purposes of points (d) and (e) of paragraph 3.1.1., approval authorities shall not approve a vehicle if the information submitted by the manufacturer is inappropriate for fulfilling the requirements of paragraph 7. of Appendix 1 to Annex 11. Paragraphs 7.2., 7.3. and 7.7. of Appendix 1 to Annex 11 shall apply under all reasonably foreseeable driving conditions. For the assessment of the implementation of the requirements set out in the first and second subparagraphs, the approval authorities shall take into account the state of technology.

3.4.6. For the purposes of paragraph 3.1.1.(f), the provisions taken to prevent tampering with and modification of the emission control computer shall include the facility for updating using a manufacturer-approved programme or calibration.

3.4.7. For the tests specified in Table A, the manufacturer shall submit to the Technical Service responsible for the type approval tests a vehicle representative of the type to be approved.

3.4.8. The application for type approval of flex-fuel vehicles shall comply with the additional requirements laid down in paragraphs 4.9.1 and 4.9.2.

3.4.9. Changes to the make of a system, component or separate technical unit that occur after a type approval shall not automatically invalidate a type approval, unless its original characteristics or technical parameters are changed in such a way that the functionality of the engine or pollution control system is affected.

4. Approval

4.1. If the vehicle type submitted for approval following this amendment meets the requirements of paragraph 5. below, approval of that vehicle type shall be granted.

4.2. An approval number shall be assigned to each type approved.

Its first two digits shall indicate the series of amendments according to which the approval was granted. The same Contracting Party shall not assign the same number to another vehicle type.

4.3. Notice of approval or of extension or refusal of approval of a vehicle type pursuant to this Regulation shall be communicated to the Parties to the Agreement which apply this Regulation by means of a form conforming to the model in Annex 2 to this Regulation.

4.3.1. In the event of amendment to the present text, for example, if new limit values are prescribed, the Parties to the Agreement shall be informed which vehicle types already approved comply with the new provisions.

4.4. There shall be affixed, conspicuously and in a readily accessible place specified on the approval form, to every vehicle conforming to a vehicle type approved under this Regulation, an international approval mark consisting of:

4.4.1. A circle surrounding the letter "E" followed by the distinguishing number of the country that has granted approval [4].

4.4.2. The number of this Regulation, followed by the letter "R", a dash and the approval number to the right of the circle described in paragraph 4.4.1.

4.4.3. The approval mark shall contain an additional character after the type approval number, the purpose of which is to distinguish vehicle category and class for which the approval has been granted. This letter should be chosen according to the Table 1 in Annex 3 to this Regulation.

4.5. If the vehicle conforms to a vehicle type approved, under one or more other Regulations annexed to the Agreement, in the country which has granted approval under this Regulation, the symbol prescribed in paragraph 4.4.1. need not be repeated; in such a case, the Regulation and approval numbers and the additional symbols of all the Regulations under which approval has been granted in the country which has granted approval under this Regulation shall be placed in vertical columns to the right of the symbol prescribed in paragraph 4.4.1.

4.6. The approval mark shall be clearly legible and be indelible.

4.7. The approval mark shall be placed close to or on the vehicle data plate.

4.8. Annex 3 to this Regulation gives examples of arrangements of the approval mark.

4.9. Additional requirements for approval of flex fuel vehicles

4.9.1. For the type approval of a flex fuel ethanol or biodiesel vehicle, the vehicle manufacturer shall describe the capability of the vehicle to adapt to any mixture of petrol and ethanol fuel (up to an 85 per cent ethanol blend) or diesel and biodiesel that may occur across the market.

4.9.2. For flex fuel vehicles, the transition from one reference fuel to another between the tests shall take place without manual adjustment of the engine settings.

4.10. Requirements for approval regarding the OBD system

4.10.1. The manufacturer shall ensure that all vehicles are equipped with an OBD system.

4.10.2. The OBD system shall be designed, constructed and installed on a vehicle so as to enable it to identify types of deterioration or malfunction over the entire life of the vehicle.

4.10.3. The OBD system shall comply with the requirements of this Regulation during conditions of normal use.

4.10.4. When tested with a defective component in accordance with Appendix 1 of Annex 11, the OBD system malfunction indicator shall be activated. The OBD system malfunction indicator may also activate during this test at levels of emissions below the OBD threshold limits specified in Annex 11.

4.10.5. The manufacturer shall ensure that the OBD system complies with the requirements for in-use performance set out in paragraph 7. of Appendix 1 to Annex 11 of this Regulation under all reasonably foreseeable driving conditions.

4.10.6. In-use performance related data to be stored and reported by a vehicle's OBD system according to the provisions of item 7.6. of Appendix 1 to Annex 11 shall be made readily available by the manufacturer to national authorities and independent operators without any encryption.

5. Specifications and tests

Small volume manufacturers

As an alternative to the requirements of this paragraph, vehicle manufacturers whose world-wide annual production is less than 10,000 units may obtain approval on the basis of the corresponding technical requirements specified in the table below.

Legislative Act	Requirements
The California Code of Regulations, Title 13, paragraphs 1961(a) and 1961(b)(1)(C)(1) applicable to 2001 and later model year vehicles, 1968.1, 1968.2, 1968.5, 1976 and 1975, published by Barclay's Publishing.	Type approval shall be granted under the California Code of Regulations applicable to the most recent model year of light duty vehicle.

The emissions tests for roadworthiness purposes set out in Annex 5 and the requirements for access to vehicle OBD information set out in paragraph 5. of Annex 11 shall still be required to obtain type approval with regard to emissions under this paragraph.

The Approval Authority shall inform the other approval authorities of Contracting Parties of the circumstances of each type approval granted under this paragraph.

5.1. General

5.1.1. The components liable to affect the emission of pollutants shall be so designed, constructed and assembled as to enable the vehicle, in normal use, despite the vibration to which they may be subjected, to comply with the provisions of this Regulation.

5.1.2. The technical measures taken by the manufacturer shall be such as to ensure that in conformity with the provisions of this Regulation, exhaust gas and evaporative emissions are effectively limited throughout the normal life of the vehicle and under normal conditions of use. This will include the security of those hoses and their joints and connections, used within the emission control systems, which shall be so constructed as to conform with the original design intent. For exhaust emissions, these provisions are deemed to be met if the provisions of paragraphs 5.3.1.4. and 8.2.3.1. respectively are complied with. For evaporative emissions, these conditions are deemed to be met if the provisions of paragraphs 5.3.1.4. and 8.2.3.1. respectively are complied with.

5.1.2.1. The use of a defeat device is prohibited.

5.1.3. Inlet orifices of petrol tanks

5.1.3.1. Subject to paragraph 5.1.3.2., the inlet orifice of the petrol or ethanol tank shall be so designed as to prevent the tank from being filled from a fuel pump delivery nozzle which has an external diameter of 23.6 mm or greater.

5.1.3.2. Paragraph 5.1.3.1. shall not apply to a vehicle in respect of which both of the following conditions are satisfied, i.e.:

5.1.3.2.1. The vehicle is so designed and constructed that no device designed to control the emission of gaseous pollutants shall be adversely affected by leaded petrol; and

5.1.3.2.2. The vehicle is conspicuously, legibly and indelibly marked with the symbol for unleaded petrol, specified in ISO 2575:1982, in a position immediately visible to a person filling the petrol tank. Additional markings are permitted.

5.1.4. Provision shall be made to prevent excess evaporative emissions and fuel spillage caused by a missing fuel filler cap.

This may be achieved by using one of the following:

5.1.4.1. An automatically opening and closing, non-removable fuel filler cap;

5.1.4.2. Design features which avoid excess evaporative emissions in the case of a missing fuel filler cap;

5.1.4.3. Any other provision which has the same effect. Examples may include, but are not limited to, a tethered filler cap, a chained filler cap or one utilising the same locking key for the filler cap as for the vehicle's ignition. In this case, the key shall be removable from the filler cap only in the locked condition.

5.1.5. Provisions for electronic system security

5.1.5.1. Any vehicle with an emission control computer shall include features to deter modification, except as authorised by the manufacturer. The manufacturer shall authorise modifications if these modifications are necessary for the diagnosis, servicing, inspection, retrofitting or repair of the vehicle. Any reprogrammable computer codes or operating parameters shall be resistant to tampering and afford a level of protection at least as good as the provisions in ISO DIS 15031-7, dated October 1998 (SAE J2186 dated October 1996), provided that the security exchange is conducted using the protocols and diagnostic connector as prescribed in paragraph 6.5. of Annex II, Appendix 1. Any removable calibration memory chips shall be potted, encased in a sealed container or protected by electronic algorithms and shall not be changeable without the use of specialised tools and procedures.

5.1.5.2. Computer-coded engine operating parameters shall not be changeable without the use of specialised tools and procedures (e. g. soldered or potted computer components or sealed (or soldered) computer enclosures).

5.1.5.3. In the case of mechanical fuel-injection pumps fitted to compression-ignition engines, manufacturers shall take adequate steps to protect the maximum fuel delivery setting from tampering while a vehicle is in service.

5.1.5.4. Manufacturers may apply to the Approval Authority for an exemption to one of these requirements for those vehicles which are unlikely to require protection. The criteria that the Approval Authority will evaluate in considering an exemption will include, but are not limited to, the current availability of performance chips, the high-performance capability of the vehicle and the projected sales volume of the vehicle.

5.1.5.5. Manufacturers using programmable computer code systems (e.g. Electrical Erasable Programmable Read-Only Memory, EEPROM) shall deter unauthorised reprogramming. Manufacturers shall include enhanced tamper protection strategies and write protect features requiring electronic access to an off-site computer maintained by the manufacturer. Methods giving an adequate level of tamper protection will be approved by the authority.

5.1.6. It shall be possible to inspect the vehicle for roadworthiness test in order to determine its performance in relation to the data collected in accordance with paragraph 5.3.7. of this Regulation. If this inspection requires a special procedure, this shall be detailed in the service manual (or equivalent media). This special procedure shall not require the use of special equipment other than that provided with the vehicle.

5.2. Test procedure

Table A illustrates the various possibilities for type approval of a vehicle.

5.2.1. Positive ignition engine-powered vehicles and hybrid electric vehicles equipped with a positive-ignition engine shall be subject to the following tests:

Type I (verifying the average exhaust emissions after a cold start);

Type II (carbon monoxide emission at idling speed);

Type III (emission of crankcase gases);

Type IV (evaporation emissions);

Type V (durability of anti-pollution devices);

Type VI (verifying the average low ambient temperature carbon monoxide and hydrocarbon exhaust emissions after a cold start);

OBD-test.

5.2.2. Positive ignition engine-powered vehicle and hybrid electric vehicles equipped with positive-ignition engine fuelled with LPG or NG/biomethane (mono or bi-fuel) shall be subjected to the following tests (according to Table A):

Type I (verifying the average exhaust emissions after a cold start);

Type II (carbon monoxide emissions at idling speed);

Type III (emission of crankcase gases);

Type IV (evaporative emissions), where applicable;

Type V (durability of anti-pollution devices);

Type VI (verifying the average low ambient temperature carbon monoxide and hydrocarbon exhaust emissions after a cold start), where applicable,

OBD test.

5.2.3. Compression ignition engine-powered vehicles and hybrid electric vehicles equipped with a compression ignition engine shall be subject to the following tests:

Type I (verifying the average exhaust emissions after a cold start);

Type V (durability of anti-pollution control devices);

OBD test.

Table A. Requirements

Application of test requirements for type approval and extensions

	Vehicles with positive ignition engines including hybrids								Vehicles with C.I. engines including hybrids
	Mono fuel				Bi fuel1			Flex fuel1	Flex fuel	Mono fuel
Reference fuel	Petrol (E5)	LPG	NG/ Biomethane	Hydrogen	Petrol (E5)	Petrol (E5)	Petrol (E5)	Petrol (E5)	Diesel (B5)	Diesel (B5)
Reference fuel	Petrol (E5)	LPG	NG/ Biomethane	Hydrogen	LPG	NG/ Biomethane	Hydrogen	Ethanol (E85)	Biodiesel	Diesel (B5)
Gaseous pollutants (Type I test)	Yes	Yes	Yes		Yes (both fuels)	Yes (both fuels)	Yes (petrol only) (2)	Yes (both fuels)	Yes (B5 only)2	Yes
Particulates (Type I test)	Yes (direct injection)	-	-		Yes (direct injection) (petrol only)	Yes (direct injection) (petrol only)	Yes (direct injection) (petrol only) 2	Yes (direct injection) (both fuels)	Yes (B5 only)2	Yes
Idle emissions (Type II test)	Yes	Yes	Yes		Yes (both fuels)	Yes (both fuels)	Yes (petrol only) 2	Yes (both fuels)	-	-
Crankcase emissions (Type III test)	Yes	Yes	Yes		Yes (petrol only)	Yes (petrol only)	Yes (petrol only) 2	Yes (petrol)	-	-
Evaporative emissions (Type IV test)	Yes	-	-		Yes (petrol only)	Yes (petrol only)	Yes (petrol only) 2	Yes (petrol)	-	-
Durability (Type V test)	Yes	Yes	Yes		Yes (petrol only)	Yes (petrol only)	Yes (petrol only) (2)	Yes (petrol)	Yes (B5 only)2	Yes
Low temperature emissions (Type VI test)	Yes	-	-		Yes (petrol only)	Yes (petrol only)	Yes (petrol only) 2	Yes (both fuels)3	-	-
In-service conformity	Yes	Yes	Yes		Yes (both fuels)	Yes (both fuels)	Yes (petrol only) 2	Yes (both fuels)	Yes (B5 only)2	Yes
On-board diagnostics	Yes	Yes	Yes		Yes	Yes	Yes	Yes	Yes (B5 only)	Yes

1 When a bi fuel vehicle is combined with a flex fuel vehicle, both test requirements are applicable.

2 This provision is temporary, further requirements for biodiesel and hydrogen shall be proposed later on.

3 For this test, fuel applicable to low ambient temperatures should be used. In the absence of a winter grade reference fuel specification, the applicable winter grade fuel for this test should be agreed between the Approval Authority and the manufacturer according to the existing market specifications. Development of a reference fuel for this application is underway.

5.3. Description of tests

5.3.1. Type I test (Simulating the average exhaust emissions after a cold start).

5.3.1.1. Figure 1 illustrates the routes for Type I test. This test shall be carried out on all vehicles referred to in paragraph 1.and its sub-paragraphs.

5.3.1.2. The vehicle is placed on a chassis dynamometer equipped with a means of load and inertia simulation.

5.3.1.2.1. A test lasting a total of 19 minutes and 40 seconds, made up of two parts, One and Two, is performed without interruption. An unsampled period of not more than 20 seconds may, with the agreement of the manufacturer, be introduced between the end of Part One and the beginning of Part Two in order to facilitate adjustment of the test equipment.

5.3.1.2.1.1. Vehicles that are fuelled with LPG or NG/biomethane shall be tested in the Type I test for variation in the composition of LPG or NG/biomethane, as set out in Annex 12. Vehicles that can be fuelled either with petrol or LPG or NG/biomethane shall be tested on both the fuels, tests on LPG or NG/biomethane being performed for variation in the composition of LPG or NG/biomethane, as set out in Annex 12.

5.3.1.2.1.2. Notwithstanding the requirement of paragraph 5.3.1.2.1.1., vehicles that can be fuelled with either petrol or a gaseous fuel, but where the petrol system is fitted for emergency purposes or starting only and which the petrol tank cannot contain more than 15 litres of petrol will be regarded for the test Type I as vehicles that can only run on a gaseous fuel.

5.3.1.2.2. Part One of the test is made up of four elementary urban cycles. Each elementary urban cycle comprises fifteen phases (idling, acceleration, steady speed, deceleration, etc.).

5.3.1.2.3. Part Two of the test is made up of one extra-urban cycle. The extra-urban cycle comprises 13 phases (idling, acceleration, steady speed, deceleration, etc.).

5.3.1.2.4. During the test, the exhaust gases are diluted and a proportional sample collected in one or more bags. The exhaust gases of the vehicle tested are diluted, sampled and analysed, following the procedure described below, and the total volume of the diluted exhaust is measured. Not only the carbon monoxide, hydrocarbon and nitrogen oxide emissions but also the particulate pollutant emissions from vehicles equipped with compression-ignition engines are recorded.

5.3.1.3. The test is carried out using the procedure of Type I test as described in Annex 4a. The method used to collect and analyse the gases is prescribed in Appendix 2 and 3 of Annex 4a, and the method to sample and analyse the particulates shall be as prescribed in Appendix 4 and 5 of Annex 4a.

5.3.1.4. Subject to the requirements of paragraph 5.3.1.5. the test shall be repeated three times. The results are multiplied by the appropriate deterioration factors obtained from paragraph 5.3.6. and, in the case of periodically regenerating systems as defined in paragraph 2.20., also must be multiplied by the factors Ki obtained from Annex 13. The resulting masses of gaseous emissions and, in the case of vehicles equipped with compression-ignition engines, the mass of particulates obtained in each test shall be less than the limits shown in the Table 1 below:

5.3.1.4.1. Notwithstanding the requirements of paragraph 5.3.1.4., for each pollutant or combination of pollutants, one of the three resulting masses obtained may exceed, by not more than 10 per cent, the limit prescribed, provided the arithmetical mean of the three results is below the prescribed limit. Where the prescribed limits are exceeded for more than one pollutant, it is immaterial whether this occurs in the same test or in different tests.

5.3.1.4.2. When the tests are performed with gaseous fuels, the resulting mass of gaseous emissions shall be less than the limits for petrol-engined vehicles in the above table.

5.3.1.5. The number of tests prescribed in paragraph 5.3.1.4. is reduced in the conditions hereinafter defined, where V1 is the result of the first test and V2 the result of the second test for each pollutant or for the combined emission of two pollutants subject to limitation.

5.3.1.5.1. Only one test is performed if the result obtained for each pollutant or for the combined emission of two pollutants subject to limitation, is less than or equal to 0.70 L (i.e. V1  0.70 L).

5.3.1.5.2. If the requirement of paragraph 5.3.1.5.1. is not satisfied, only two tests are performed if, for each pollutant or for the combined emission of two pollutants subject to limitation, the following requirements are met:

V1  0.85 L and V1 + V2  1.70 L and V2  L.

Figure 1

Flow chart for Type I type approval

5.3.2. Type II test (Carbon monoxide emission test at idling speed)

5.3.2.1. This test is carried out on all vehicles powered by positive-ignition engines having:

5.3.2.1.1. Vehicles that can be fuelled either with petrol or with LPG or NG/biomethane shall be tested in the test Type II on both fuels.

5.3.2.1.2. Notwithstanding the requirement of paragraph 5.3.2.1.1., vehicles that can be fuelled with either petrol or a gaseous fuel, but where the petrol system is fitted for emergency purposes or starting only and which the petrol tank cannot contain more than 15 litres of petrol will be regarded for the test Type II as vehicles that can only run on a gaseous fuel.

5.3.2.2. For the Type II test set out in Annex 5, at normal engine idling speed, the maximum permissible carbon monoxide content in the exhaust gases shall be that stated by the vehicle manufacturer. However, the maximum carbon monoxide content shall not exceed 0.3 per cent vol.

At high idle speed, the carbon monoxide content by volume of the exhaust gases shall not exceed 0.2 per cent, with the engine speed being at least 2,000 min-1 and Lambda being 1 ±0.03 or in accordance with the specifications of the manufacturer.

5.3.3. Type III test (verifying emissions of crankcase gases)

5.3.3.1. This test shall be carried out on all vehicles referred to in paragraph 1. except those having compression-ignition engines.

5.3.3.1.1. Vehicles that can be fuelled either with petrol or with LPG or NG should be tested in the Type III test on petrol only.

5.3.3.1.2. Notwithstanding the requirement of paragraph 5.3.3.1.1., vehicles that can be fuelled with either petrol or a gaseous fuel, but where the petrol system is fitted for emergency purposes or starting only and which the petrol tank cannot contain more than 15 litres of petrol will be regarded for the test Type III as vehicles that can only run on a gaseous fuel.

5.3.3.2. When tested in accordance with Annex 6, the engine's crankcase ventilation system shall not permit the emission of any of the crankcase gases into the atmosphere.

5.3.4. Type IV test (Determination of evaporative emissions)

5.3.4.1. This test shall be carried out on all vehicles referred to in paragraph 1. except those vehicles having a compression-ignition engine, vehicles fuelled with LPG or NG/biomethane.

5.3.4.1.1. Vehicles that can be fuelled either with petrol or with LPG or with NG/biomethane should be tested in the Type IV test on petrol only.

5.3.4.2. When tested in accordance with Annex 7, evaporative emissions shall be less than 2 g/test.

5.3.5. Type VI test (Verifying the average low ambient temperature carbon monoxide and hydrocarbon exhaust emissions after a cold start).

5.3.5.1. This test shall not be applied to compression ignition vehicles.

However, for compression ignition vehicles when applying for type approval, manufacturers shall present to the Approval Authority information showing that the NOX after treatment device reaches a sufficiently high temperature for efficient operation within 400 seconds after a cold start at -7 °C as described in Type VI test.

In addition, the manufacturer shall provide the Approval Authority with information on the operating strategy of the exhaust gas recirculation system (EGR), including its functioning at low temperatures.

This information shall also include a description of any effects on emissions.

The Approval Authority shall not grant type approval if the information provided is insufficient to demonstrate that the after treatment device actually reaches a sufficiently high temperature for efficient operation within the designated period of time.

5.3.5.1.1. The vehicle is placed on a chassis dynamometer equipped with a means of load an inertia simulation.

5.3.5.1.2. The test consists of the four elementary urban driving cycles of Part One of the Type I test. The Part One test is described in paragraph 6.1.1. of Annex 4a, and illustrated in figure 1 of the same annex. The low ambient temperature test lasting a total of 780 seconds shall be carried out without interruption and start at engine cranking.

5.3.5.1.3. The low ambient temperature test shall be carried out at an ambient test temperature of 266 K (-7°C). Before the test is carried out, the test vehicles shall be conditioned in a uniform manner to ensure that the test results may be reproducible. The conditioning and other test procedures are carried out as described in Annex 8.

5.3.5.1.4. During the test, the exhaust gases are diluted and a proportional sample collected. The exhaust gases of the vehicle tested are diluted, sampled and analysed, following the procedure described in Annex 8, and the total volume of the diluted exhaust is measured. The diluted exhaust gases are analysed for carbon monoxide and total hydrocarbons.

5.3.5.2. Subject to the requirements in paragraphs 5.3.5.2.2. and 5.3.5.3. the test shall be performed three times. The resulting mass of carbon monoxide and hydrocarbon emission shall be less than the limits shown in the table below:

Emission limit for the carbon monoxide and hydrocarbon tailpipe emissions after a cold start test

Test temperature 266 K (-7 °C)
Vehicle catgory	Class	Mass of carbon monoxide (CO) L1 (g/km)	Mass of hydrocarbons (HC) L2 (g/km)
M	-	15	1.8
N1	I	15	1.8
	II	24	2.7
	III	30	3.2
N2	-	30	3.2

5.3.5.2.1. Notwithstanding the requirements of paragraph 5.3.5.2., for each pollutant, not more than one of the three results obtained may exceed the limit prescribed by not more than 10 per cent, provided the arithmetical mean value of the three results is below the prescribed limit. Where the prescribed limits are exceeded for more than one pollutant, it is immaterial whether this occurs in the same test or in different tests.

5.3.5.2.2. The number of tests prescribed in paragraph 5.3.5.2. may, at the request of the manufacturer, be increased to 10 if the arithmetical mean of the first three results is lower than 110 per cent of the limit. In this case, the requirement after testing is only that the arithmetical mean of all 10 results shall be less than the limit value.

5.3.5.3. The number of tests prescribed in paragraph 5.3.5.2. may be reduced according to paragraphs 5.3.5.3.1. and 5.3.5.3.2.

5.3.5.3.1. Only one test is performed if the result obtained for each pollutant of the first test is less than or equal to 0.70 L.

5.3.5.3.2. If the requirement of paragraph 5.3.5.3.1. is not satisfied, only two tests are performed if for each pollutant the result of the first test is less than or equal to 0.85 L and the sum of the first two results is less than or equal to 1.70 L and the result of the second test is less than or equal to L.

(V1 ≤ 0.85 L and V1 + V2 ≤ 1.70 L and V2 ≤ L).

5.3.6. Type V test (Durability of anti-pollution devices)

5.3.6.1. This test shall be carried out on all vehicles referred to in paragraph 1 to which the test specified in paragraph 5.3.1. applies. The test represents an ageing test of 160,000 km driven in accordance with the programme described in Annex 9 on a test track, on the road or on a chassis dynamometer.

5.3.6.1.1. Vehicles that can be fuelled either with petrol or with LPG or NG should be tested in the Type V test on petrol only. In that case the deterioration factor found with unleaded petrol will also be taken for LPG or NG.

5.3.6.2. Notwithstanding the requirement of paragraph 5.3.6.1., a manufacturer may choose to have the deterioration factors from the following table used as an alternative to testing to paragraph 5.3.6.1.

Engine Category	Assigned deterioration factors
Engine Category	CO	THC	NMHC	NOx	HC + NOx	Particulate Matter (PM)	Particles
Positive-ignition	1.5	1.3	1.3	1.6	-	1.0	1.0
Compression-ignition	1.5	-	-	1.1	1.1	1.0	1.0

At the request of the manufacturer, the Technical Service may carry out the Type I test before the Type V test has been completed using the deterioration factors in the table above. On completion of the Type V test, the Technical Service may then amend the type approval results recorded in Annex 2 by replacing the deterioration factors in the above table with those measured in the Type V Test.

5.3.6.3. Deterioration factors are determined using either procedure in paragraph 5.3.6.1. or using the values in the table in paragraph 5.3.6.2. The factors are used to establish compliance with the requirements of paragraphs 5.3.1.4. and 8.2.3.1.

5.3.7. Emission data required for roadworthiness testing

5.3.7.1. This requirement applies to all vehicles powered by a positive-ignition engine for which type approval is sought in accordance with this amendment.

5.3.7.2. When tested in accordance with Annex 5 (Type II test) at normal idling speed:

(a) The carbon monoxide content by volume of the exhaust gases emitted shall be recorded;

(b) The engine speed during the test shall be recorded, including any tolerances.

5.3.7.3. When tested at "high idle" speed (i. e. > 2,000 min.-1)

(a) The carbon monoxide content by volume of the exhaust gases emitted shall be recorded;

(b) The Lambda value (*) shall be recorded;

(*) The Lambda value shall be calculated using the simplified Brettschneider equation as follows:

Where:

[ ]	=	concentration in per cent volume,
K1	=	conversion factor for NDIR measurement to FID measurement (provided by manufacturer of measuring equipment),
Hcv	=	Atomic ratio of hydrogen to carbon,
		(a) for petrol (E5) 1.89 (b) for LPG 2.53 (c) for NG/biomethane 4.0 (d) for ethanol (E85) 2.74
Ocv	=	Atomic ratio of oxygen to carbon,
		(a) for petrol (E5) 0.016 (b) for LPG 0.0 (c) for NG/biomethane 0.0 (d) for ethanol (E85) 0.39

5.3.7.4. The engine oil temperature at the time of the test shall be measured and recorded.

5.3.7.5. The table in item 2.2 to Annex 2 shall be completed.

5.3.7.6. The manufacturer shall confirm the accuracy of the Lambda value recorded at the time of type approval in paragraph 5.3.7.3. as being representative of typical production vehicles within 24 months of the date of the granting of type approval by the Competent Authority. An assessment shall be made based on surveys and studies of production vehicles.

5.3.8. On-board diagnostics OBD - test

This test shall be carried out on all vehicles referred to in paragraph 1. The test procedure described in Annex 11, paragraph 3. shall be followed.

6. Modifications of the vehicle type

6.1. Every modification of the vehicle type shall be notified to the Technical Service that approved the vehicle type. The department may then either:

6.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect and that in any case the vehicle still complies with the requirement; or

6.1.2. Require a further test report from the Technical Service responsible for conducting the tests.

6.2. Confirmation or refusal of approval, specifying the alterations, shall be communicated by the procedure specified in paragraph 4.3. above to the Parties to the Agreement which apply this Regulation.

6.3. The type Approval Authority issuing the extension of approval shall assign a series number to the extension and inform thereof the other Contracting Parties applying this Regulation by means of a communication form conforming to the model in Annex 2 to this Regulation.

7. Extensions to type approvals

7.1. Extensions for tailpipe emissions (Type I, Type II and Type VI tests)

7.1.1. Vehicles with different reference masses

7.1.1.1. The type approval shall be extended only to vehicles with a reference mass requiring the use of the next two higher equivalent inertia or any lower equivalent inertia.

7.1.1.2. For category N vehicles, the approval shall be extended only to vehicles with a lower reference mass, if the emissions of the vehicle already approved are within the limits prescribed for the vehicle for which extension of the approval is requested.

7.1.2. Vehicles with different overall transmission ratios

7.1.2.1. The type approval shall be extended to vehicles with different transmission ratios only under certain conditions.

7.1.2.2. To determine whether type approval can be extended, for each of the transmission ratios used in the Type I and Type VI tests, the proportion,

E = |(V2 − V1)|/V1

shall be determined where, at an engine speed of 1,000 min-1, V1 is the speed of the type of vehicle approved and V2 is the speed of the vehicle type for which extension of the approval is requested.

7.1.2.3. If, for each transmission ratio, E ≤ 8 per cent, the extension shall be granted without repeating the Type I and Type VI tests.

7.1.2.4. If, for at least one transmission ratio, E > 8 per cent, and if, for each gear ratio, E ≤ 13 per cent, the Type I and Type VI tests shall be repeated. The tests may be performed in a laboratory chosen by the manufacturer subject to the approval of the Technical Service. The report of the tests shall be sent to the Technical Service responsible for the type approval tests.

7.1.3. Vehicles with different reference masses and transmission ratios

The type approval shall be extended to vehicles with different reference masses and transmission ratios, provided that all the conditions prescribed in paragraphs 7.1.1. and 7.1.2. are fulfilled.

7.1.4. Vehicles with periodically regenerating systems

The type approval of a vehicle type equipped with a periodically regenerating system shall be extended to other vehicles with periodically regenerating systems, whose parameters described below are identical, or within the stated tolerances. The extension shall only relate to measurements specific to the defined periodically regenerating system.

7.1.4.1. Identical parameters for extending approval are:

(a) Engine;

(b) Combustion process;

(d) Construction (i.e. type of enclosure, type of precious metal, type of substrate, cell density);

(e) Type and working principle;

(f) Dosage and additive system;

(g) Volume ±10 per cent;

(h) Location (temperature ±50 °C at 120 km/h or 5 per cent difference of max. temperature/pressure).

7.1.4.2. Use of Ki factors for vehicles with different reference masses

The Ki factors developed by the procedures in paragraph 3. of Annex 13 of this Regulation for type approval of a vehicle type with a periodically regenerating system, may be used by other vehicles which meet the criteria referred to in paragraph 7.1.4.1. and have a reference mass within the next two higher equivalent inertia classes or any lower equivalent inertia.

7.1.5. Application of extensions to other vehicles

When an extension has been granted in accordance with paragraphs 7.1.1. to 7.1.4., such a type approval shall not be further extended to other vehicles.

7.2. Extensions for evaporative emissions (Type IV test)

7.2.1. The type approval shall be extended to vehicles equipped with a control system for evaporative emissions which meet the following conditions:

7.2.1.1. The basic principle of fuel/air metering (e.g. single point injection,) is the same.

7.2.1.2. The shape of the fuel tank and the material of the fuel tank and liquid fuel hoses is identical.

7.2.1.3. The worst-case vehicle with regard to the cross-paragraph and approximate hose length shall be tested. Whether non-identical vapour/liquid separators are acceptable is decided by the Technical Service responsible for the type approval tests.

7.2.1.4. The fuel tank volume is within a range of ±10 per cent.

7.2.1.5. The setting of the fuel tank relief valve is identical.

7.2.1.6. The method of storage of the fuel vapour is identical, i.e. trap form and volume, storage medium, air cleaner (if used for evaporative emission control), etc.

7.2.1.7. The method of purging the stored vapour is identical (e.g. air flow, start point or purge volume over the preconditioning cycle).

7.2.1.8. The method of sealing and venting the fuel metering system is identical.

7.2.2. The type approval shall be extended to vehicles with:

7.2.2.1. Different engine sizes;

7.2.2.2. Different engine powers;

7.2.2.3. Automatic and manual gearboxes;

7.2.2.4. Two and four wheel transmissions;

7.2.2.5. Different body styles; and

7.2.2.6. Different wheel and tyre sizes.

7.3. Extensions for durability of pollution control devices (Type V test)

7.3.1. The type approval shall be extended to different vehicle types, provided that the vehicle, engine or pollution control system parameters specified below are identical or remain within the prescribed tolerances:

7.3.1.1. Vehicle:

Inertia category: the two inertia categories immediately above and any inertia category below.

Total road load at 80 km/h: +5 per cent above and any value below.

7.3.1.2. Engine

(a) Engine cylinder capacity (15 per cent);

(b) Number and control of valves;

(d) Type of cooling system;

(e) Combustion process.

7.3.1.3. Pollution control system parameters:

(a) Catalytic converters and particulate filters:

(i) Number of catalytic converters, filters and elements;

(ii) Size of catalytic converters and filters (volume of monolith ±10 per cent);

(iii) Type of catalytic activity (oxidizing, three-way, lean NOx trap, SCR, lean NOx catalyst or other);

(iv) Precious metal load (identical or higher);

(v) Precious metal type and ratio (±15 per cent);

(vi) Substrate (structure and material);

(vii) Cell density;

(viii) Temperature variation of no more than 50 K at the inlet of the catalytic converter or filter. This temperature variation shall be checked under stabilized conditions at a speed of 120 km/h and the load setting of the Type I test.

(b) Air injection:

(i) With or without;

(ii) Type (pulsair, air pumps, other(s)).

(i) With or without;

(ii) Type (cooled or non cooled, active or passive control, high pressure or low pressure).

7.3.1.4. The durability test may be carried out using a vehicle, which has a different body style, gear box (automatic or manual) and size of the wheels or tyres, from those of the vehicle type for which the type approval is sought.

7.4. Extensions for on-board diagnostics

7.4.1. The type approval shall be extended to different vehicles with identical engine and emission control systems as defined in Annex 11, Appendix 2. The type approval shall be extended regardless of the following vehicle characteristics:

(a) Engine accessories;

(b) Tyres;

(d) Cooling system;

(e) Overall gear ratio;

(f) Transmission type; and

(g) Type of bodywork.

8. Conformity of production (COP)

8.1. Every vehicle bearing an approval mark as prescribed under this Regulation shall conform, with regard to components affecting the emission of gaseous and particulate pollutants by the engine, emissions from the crankcase and evaporative emissions, to the vehicle type approved. The conformity of production procedures shall comply with those set out in the 1958 Agreement, Appendix 2 (E/ECE/324-E/ECE/TRANS/505/Rev.2), with the following requirements set out in the paragraphs below.

8.1.1. Where applicable the tests of Types I, II, III, IV and the test for OBD shall be performed, as described in Table A to this Regulation. The specific procedures for conformity of production are set out in the paragraphs 8.2. to 8.10.

8.2. Checking the conformity of the vehicle for a Type I test

8.2.1. The Type I test shall be carried out on a vehicle of the same specification as described in the type approval certificate. When a Type I test is to be carried out for a vehicle type approval that has one or several extensions, the Type I tests shall be carried out either on the vehicle described in the initial information package or on the vehicle described in the information package relating to the relevant extension.

8.2.2. After selection by the Approval Authority, the manufacturer shall not undertake any adjustment to the vehicles selected.

8.2.2.1. Three vehicles shall be selected at random in the series and tested as described in paragraph 5.3.1. of this Regulation. The deterioration factors shall be used in the same way. The limit values are set out in paragraph 5.3.1.4., Table 1.

8.2.2.2. If the Approval Authority is satisfied with the production standard deviation given by the manufacturer, the tests shall be carried out according to Appendix 1 of this Regulation. If the Approval Authority is not satisfied with the production standard deviation given by the manufacturer, the tests shall be carried out according to Appendix 2 of this Regulation.

8.2.2.3. The production of a series shall be deemed to conform or not to conform on the basis of a sampling test of the vehicles once a pass decision is reached for all the pollutants or a fail decision is reached for one pollutant, according to the test criteria applied in the appropriate appendix.

When a pass decision has been reached for one pollutant, that decision shall not be changed by any additional tests carried out to reach a decision for the other pollutants.

If no pass decision is reached for all the pollutants and no fail decision is reached for one pollutant, a test shall be carried out on another vehicle (see Figure 2).

Figure 2

8.2.3. Notwithstanding the requirements of paragraph 5.3.1. of this Regulation, the tests shall be carried out on vehicles coming straight off the production line.

8.2.3.1. However, at the request of the manufacturer, the tests may be carried out on vehicles which have completed:

(a) A maximum of 3,000 km for vehicles equipped with a positive ignition engine;

(b) A maximum of 15,000 km for vehicles equipped with a compression ignition engine.

The running-in procedure shall be conducted by the manufacturer, who shall undertake not to make any adjustments to these vehicles.

8.2.3.2. If the manufacturer wishes to run in the vehicles, ("x" km, where x ≤ 3,000 km for vehicles equipped with a positive ignition engine and x ≤ 15,000 km for vehicles equipped with a compression ignition engine), the procedure shall be the following:

(a) The pollutant emissions (Type I) shall be measured at zero and at "x" km on the first tested vehicle;

(b) The evolution coefficient of the emissions between zero and "x" km shall be calculated for each of the pollutant:

Emissions "x" km/Emissions zero km

This may be less than 1; and

(c) The other vehicles shall not be run in, but their zero km emissions shall be multiplied by the evolution coefficient.

In this case, the values to be taken shall be:

(i) The values at "x" km for the first vehicle;

(ii) The values at zero km multiplied by the evolution coefficient for the other vehicles.

8.2.3.3. All these tests shall be conducted with commercial fuel. However, at the manufacturer's request, the reference fuels described in Annex 10 or Annex 10a may be used.

8.3. Checking the conformity of the vehicle for a Type III test

8.3.1. If a Type III test is to be carried out, it shall be conducted on all vehicles selected for the Type I conformity of production test set out in paragraph 8.2. The conditions laid down in Annex 6 shall apply.

8.4. Checking the conformity of the vehicle for a Type IV test

8.4.1. If a Type IV test is to be carried out, it shall be conducted in accordance with Annex 7.

8.5. Checking the conformity of the vehicle for On-board Diagnostics (OBD)

8.5.1. If a verification of the performance of the OBD system is to be carried out, it shall be conducted in accordance with the following requirements:

8.5.1.1. When the Approval Authority determines that the quality of production seems unsatisfactory, a vehicle shall be randomly taken from the series and subjected to the tests described in Appendix 1 to Annex 11.

8.5.1.2. The production shall be deemed to conform if this vehicle meets the requirements of the tests described in Appendix 1 to Annex 11.

8.5.1.3. If the vehicle taken from the series does not satisfy the requirements of paragraph 8.5.1.1., a further random sample of four vehicles shall be taken from the series and subjected to the tests described in Appendix 1 to Annex 11. The tests may be carried out on vehicles which have been run in for no more than 15,000 km.

8.5.1.4. The production shall be deemed to conform if at least three vehicles meet the requirements of the tests described in Annex 11, Appendix 1.

8.6. Checking the conformity of a vehicle fuelled by LPG or NG/biomethane

8.6.1. Tests for conformity of production may be performed with a commercial fuel of which the C3/C4 ratio lies between those of the reference fuels in the case of LPG, or of which the Wobbe index lies between those of the extreme reference fuels in the case of NG/biomethane. In that case a fuel analysis shall be presented to the Approval Authority.

9. In-service conformity

9.1. Introduction

This paragraph sets out the in-service conformity requirements for vehicles type approved to this Regulation.

9.2. Audit of in-service conformity

9.2.1. The audit of in-service conformity by the Approval Authority shall be conducted on the basis of any relevant information that the manufacturer has, under the same procedures as those for the conformity of production defined in Appendix 2 to Agreement E/ECE/324//E/ECE/TRANS/505/Rev.2. Information from Approval Authority and Contracting Party surveillance testing may complement the in-service monitoring reports supplied by the manufacturer.

9.2.2. The figures 4/1 and 4/2 of Appendix 4 to this Regulation illustrate the procedure for in-service conformity checking. The process for in-service conformity is described in Appendix 5 to this Regulation.

9.2.3. As part of the information provided for the in-service conformity control, at the request of the Approval Authority, the manufacturer shall report to the type Approval Authority on warranty claims, warranty repair works and OBD faults recorded at servicing, according to a format agreed at type approval. The information shall detail the frequency and substance of faults for emissions related components and systems. The reports shall be filed at least once a year for each vehicle model for the duration of the period of up to 5 years of age or 100,000 km, whichever is the sooner.

9.2.4. Parameters defining the in-service family

The in-service family may be defined by basic design parameters which shall be common to vehicles within the family. Accordingly, vehicle types may be considered as belonging to the same in-service family if they have in common, or within the stated tolerances, the following parameters:

9.2.4.1. Combustion process (two stroke, four stroke, rotary);

9.2.4.2. Number of cylinders;

9.2.4.3. Configuration of the cylinder block (in-line, V, radial, horizontally opposed, other). The inclination or orientation of the cylinders is not a criteria);

9.2.4.4. Method of engine fuelling (e.g. indirect or direct injection);

9.2.4.5. Type of cooling system (air, water, oil);

9.2.4.6. Method of aspiration (naturally aspirated, pressure charged);

9.2.4.7. Fuel for which the engine is designed (petrol, diesel, NG/biomethane, LPG, etc.). Bi-fuelled vehicles may be grouped with dedicated fuel vehicles providing one of the fuels is common;

9.2.4.8. Type of catalytic converter (three-way catalyst, lean NOX trap, SCR, lean NOX catalyst or other(s));

9.2.4.9. Type of particulate trap (with or without);

9.2.4.10. Exhaust gas recirculation (with or without, cooled or non cooled); and

9.2.4.11. Engine cylinder capacity of the largest engine within the family minus 30 per cent.

9.2.5. Information requirements

An audit of in-service conformity will be conducted by the Approval Authority on the basis of information supplied by the manufacturer. Such information shall include in particular, the following:

9.2.5.1. The name and address of the manufacturer;

9.2.5.2. The name, address, telephone and fax numbers and e-mail address of the authorized representative within the areas covered by the manufacturer's information;

9.2.5.3. The model name(s) of the vehicles included in the manufacturer's information;

9.2.5.4. Where appropriate, the list of vehicle types covered within the manufacturer's information, i.e. the in-service family group in accordance with paragraph 9.2.1.;

9.2.5.5. The vehicle identification number (VIN) codes applicable to these vehicle types within the in-service family (VIN prefix);

9.2.5.6. The numbers of the type approvals applicable to these vehicle types within the in-service family, including, where applicable, the numbers of all extensions and field fixes/recalls (re-works);

9.2.5.7. Details of extensions, field fixes/recalls to those type approvals for the vehicles covered within the manufacturer's information (if requested by the Approval Authority);

9.2.5.8. The period of time over which the manufacturer's information was collected;

9.2.5.9. The vehicle build period covered within the manufacturer's information (e.g. vehicles manufactured during the 2007 calendar year);

9.2.5.10. The manufacturer's in-service conformity checking procedure, including:

(a) Vehicle location method;

(b) Vehicle selection and rejection criteria;

(d) The manufacturer's acceptance/rejection criteria for the in-service family group;

(e) Geographical area(s) within which the manufacturer has collected information;

(f) Sample size and sampling plan used.

9.2.5.11. The results from the manufacturer's in-service conformity procedure, including:

(a) Identification of the vehicles included in the programme (whether tested or not). The identification shall include the following:

(i) Model name;

(ii) Vehicle identification number (VIN);

(iii) Vehicle registration number;

(iv) Date of manufacture;

(v) Region of use (where known);

(vi) Tyres fitted.

(b) The reason(s) for rejecting a vehicle from the sample;

(d) Repair history for each vehicle in the sample (where known);

(e) Test data, including the following:

(i) Date of test;

(ii) Location of test;

(iii) Distance indicated on vehicle odometer;

(iv) Test fuel specifications (e.g. test reference fuel or market fuel);

(v) Test conditions (temperature, humidity, dynamometer inertia weight);

(vi) Dynamometer settings (e.g. power setting);

(vii) Test results (from at least three different vehicles per family).

9.2.5.12. Records of indication from the OBD system.

9.3. Selection of vehicles for in-service conformity

9.3.1. The information gathered by the manufacturer shall be sufficiently comprehensive to ensure that in-service performance can be assessed for normal conditions of use as defined in paragraph 9.2. The manufacturer's sampling shall be drawn from at least two Contracting Parties with substantially different vehicle operating conditions. Factors such as differences in fuels, ambient conditions, average road speeds, and urban/highway driving split shall be taken into consideration in the selection of the Contracting Parties.

9.3.2. In selecting the Contracting Parties for sampling vehicles, the manufacturer may select vehicles from a Contracting Party that is considered to be particularly representative. In this case, the manufacturer shall demonstrate to the Approval Authority which granted the type approval that the selection is representative (e.g. by the market having the largest annual sales of a vehicle family within the applicable Contracting Party). When an in-service family requires more than one sample lot to be tested as defined in paragraph 9.3.5., the vehicles in the second and third sample lots shall reflect different vehicle operating conditions from those selected for the first sample.

9.3.3. The emissions testing may be done at a test facility which is located in a different market or region from where the vehicles have been selected.

9.3.4. The in-service conformity tests by the manufacturer shall be continuously carried out reflecting the production cycle of applicable vehicles types within a given in-service vehicle family. The maximum time period between commencing two in-service conformity checks shall not exceed 18 months. In the case of vehicle types covered by an extension to the type approval that did not require an emissions test, this period may be extended up to 24 months.

9.3.5. When applying the statistical procedure defined in Appendix 4, the number of sample lots shall depend on the annual sales volume of an in-service family in the territories of a regional organization (e.g. European Community), as defined in the following table:

Registrations per calendar year	Number of sample lots
Up to 100,000	1
100,001 to 200,000	2
Above 200,000	3

9.4. On the basis of the audit referred to in paragraph 9.2., the Approval Authority shall adopt one of the following decisions and actions:

(a) Decide that the in-service conformity of a vehicle type or a vehicle in-service family is satisfactory and not take any further action;

(b) Decide that the data provided by the manufacturer is insufficient to reach a decision and request additional information or test data from the manufacturer;

(c) Decide that based on data from the Approval Authority or Contracting Party surveillance testing programmes, that information provided by the manufacturer is insufficient to reach a decision and request additional information or test data from the manufacturer;

(d) Decide that the in-service conformity of a vehicle type, that is part of an in-service family, is unsatisfactory and proceed to have such vehicle type tested in accordance with Appendix 3.

9.4.1. Where Type I tests are considered necessary to check the conformity of emission control devices with the requirements for their performance while in service, such tests shall be carried out using a test procedure meeting the statistical criteria defined in Appendix 2.

9.4.2. The Approval Authority, in cooperation with the manufacturer, shall select a sample of vehicles with sufficient mileage whose use under normal conditions can be reasonably assured. The manufacturer shall be consulted on the choice of the vehicles in the sample and allowed to attend the confirmatory checks of the vehicles.

9.4.3. The manufacturer shall be authorized, under the supervision of the Approval Authority, to carry out checks, even of a destructive nature, on those vehicles with emission levels in excess of the limit values with a view to establishing possible causes of deterioration which cannot be attributed to the manufacturer (e.g. use of leaded petrol before the test date). Where the results of the checks confirm such causes, those test results shall be excluded from the conformity check.

10. Penalties for non-conformity of production

10.1. The approval granted in respect of a vehicle type pursuant to this amendment, may be withdrawn if the requirements laid down in paragraph 8.1. above are not complied with or if the vehicle or vehicles taken fail to pass the tests prescribed in paragraph 8.1.1. above.

10.2. If a Contracting Party which applies this Regulation withdraws an approval it has previously granted, it shall forthwith so notify the other Contracting Parties applying this Regulation, by means of a communication form conforming to the model in Annex 2 to this Regulation.

11. Production definitely discontinued

If the holder of the approval completely ceases to manufacture a type of vehicle approved in accordance with this Regulation, he shall so inform the type Approval Authority which granted the approval. Upon receiving the relevant communication, that authority shall inform thereof the other Contracting Parties to the 1958 Agreement applying this Regulation by means of copies of the communication form conforming to the model in Annex 2 to this Regulation.

12. Transitional provisions

12.1. General provisions

12.1.1. As from the official date of entry into force of the 06 series of amendments, no Contracting Party applying this Regulation shall refuse to grant approval under this Regulation as amended by the 06 series of amendments.

12.2. Special provisions

12.2.1. Contracting Parties applying this Regulation may continue to grant approvals to those vehicles which comply with previous levels of this Regulation, provided that the vehicles are intended for export to countries to apply the relating requirements in their national legislations.

13. Names and addresses of Technical Services responsible for conducting approval tests, and of Administrative Departments

The Parties to the 1958 Agreement which apply this Regulation shall communicate to the United Nations Secretariat the names and addresses of the Technical Services responsible for conducting approval tests and of certifying approval or extension or refusal or withdrawal of approval, issued in other countries, are to be sent.

Appendix 3

In-service conformity check

1. Introduction

This appendix sets out the criteria referred to in paragraph 8.2.7. of this Regulation regarding the selection of vehicles for testing and the procedures for the in-service conformity control.

2. Selection criteria

The criteria for acceptance of a selected vehicle are defined in paragraphs 2.1. to 2.8. of this appendix. Information is collected by vehicle examination and an interview with the owner/driver.

2.1. The vehicle shall belong to a vehicle type that is type approved under this Regulation and covered by a certificate of conformity in accordance with the 1958 Agreement. It shall be registered and used in a country of the Contracting Parties.

2.2. The vehicle shall have been in service for at least 15,000 km or 6 months, whichever is the later, and for no more than 100,000 km or 5 years, whichever is the sooner.

2.3. There shall be a maintenance record to show that the vehicle has been properly maintained, e.g. has been serviced in accordance with the manufacturer's recommendations.

2.4. The vehicle shall exhibit no indications of abuse (e.g. racing, overloading, misfuelling, or other misuse), or other factors (e.g. tampering) that could affect emission performance. In the case of vehicles fitted with an OBD system, the fault code and mileage information stored in the computer is taken into account. A vehicle shall not be selected for testing if the information stored in the computer shows that the vehicle has operated after a fault code was stored and a relatively prompt repair was not carried out.

2.5. There shall have been no unauthorised major repair to the engine or major repair of the vehicle.

2.6. The lead content and sulphur content of a fuel sample from the vehicle tank shall meet applicable standards and there shall be no evidence of misfuelling. Checks may be done in the exhaust, etc.

2.7. There shall be no indication of any problem that might jeopardise the safety of laboratory personnel.

2.8. All anti-pollution system components on the vehicle shall be in conformity with the applicable type approval.

3. Diagnosis and maintenance

Diagnosis and any normal maintenance necessary shall be performed on vehicles accepted for testing, prior to measuring exhaust emissions, in accordance with the procedure laid down in paragraphs 3.1. to 3.7. below.

3.1. The following checks shall be carried out: checks on air filter, all drive belts, all fluid levels, radiator cap, all vacuum hoses and electrical wiring related to the anti-pollution system for integrity; checks on ignition, fuel metering and anti-pollution device components for maladjustments and/or tampering. All discrepancies shall be recorded.

3.2. The OBD system shall be checked for proper functioning. Any malfunction indications in the OBD memory shall be recorded and the requisite repairs shall be carried out. If the OBD malfunction indicator registers a malfunction during a preconditioning cycle, the fault may be identified and repaired. The test may be re-run and the results of that repaired vehicle used.

3.3. The ignition system shall be checked and defective components replaced, for example spark plugs, cables, etc.

3.4. The compression shall be checked. If the result is unsatisfactory the vehicle is rejected.

3.5. The engine parameters shall be checked to the manufacturer's specifications and adjusted if necessary.

3.6. If the vehicle is within 800 km of a scheduled maintenance service, that service shall be performed according to the manufacturer's instructions. Regardless of odometer reading, the oil and air filter may be changed at the request of the manufacturer.

3.7. Upon acceptance of the vehicle, the fuel shall be replaced with appropriate emission test reference fuel, unless the manufacturer accepts the use of market fuel.

3.8. In the case of vehicles equipped with periodically regenerating systems as defined in paragraph 2.20., it shall be established that the vehicle is not approaching a regeneration period. (The manufacturer must be given the opportunity to confirm this).

3.8.1. If this is the case, the vehicle must be driven until the end of the regeneration. If regeneration occurs during emissions measurement, then a further test must be carried out to ensure that regeneration has been completed. A complete new test shall then be performed, and the first and second test results not taken into account.

3.8.2. As an alternative to paragraph 3.8.1., if the vehicle is approaching a regeneration the manufacturer may request that a specific conditioning cycle is used to ensure that regeneration (e.g. this may involve high speed, high load driving).

The manufacturer may request that testing may be carried out immediately after regeneration or after the conditioning cycle specified by the manufacturer and normal test preconditioning.

4. In-service testing

4.1. When a check on vehicles is deemed necessary, emission tests in accordance with Annex 4a to this Regulation are performed on pre-conditioned vehicles selected in accordance with the requirements of paragraphs 2. and 3. of this Appendix. Pre-conditioning cycles additional to those specified in paragraph 6.3. of Annex 4a to this Regulation will only be allowed if they are representative of normal driving.

4.2. Vehicles equipped with an OBD system may be checked for proper in-service functionality of the malfunction indication, etc., in relation to levels of emissions (e.g. the malfunction indication limits defined in Annex 11 to this Regulation) for the type approved specifications.

4.3. The OBD system may be checked, for example, for levels of emissions above the applicable limit values with no malfunction indication, systematic erroneous activation of the malfunction indication and identified faulty or deteriorated components in the OBD system.

4.4. If a component or system operates in a manner not covered by the particulars in the type approval certificate and/or information package for such vehicle types and such deviation has not been authorised under the 1958 Agreement, with no malfunction indication by the OBD, the component or system shall not be replaced prior to emission testing, unless it is determined that the component or system has been tampered with or abused in such a manner that the OBD does not detect the resulting malfunction.

5. Evaluation of results

5.1. The test results are submitted to the evaluation procedure in accordance with Appendix 4.

5.2. Test results shall not be multiplied by deterioration factors.

5.3. In the case of periodically regenerating systems as defined in paragraph 2.20., the results shall be multiplied by the factors Ki obtained at the time when type approval was granted.

6. Plan of remedial measures

6.1. When more than one vehicle is found to be an outlying emitter that either,

(a) Meets the conditions of paragraph 3.2.3. of Appendix 4 and where both the Approval Authority and the manufacturer agree that the excess emission is due to the same cause; or

(b) Meets the conditions of paragraph 3.2.4. of Appendix 4 where the Approval Authority has determined that the excess emission is due to the same cause.

The Approval Authority must request the manufacturer to submit a plan of remedial measures to remedy the non-compliance.

6.2. The plan of remedial measures shall be filed with the type approval authority not later than 60 working days from the date of the notification referred to in paragraph 6.1. above. The type approval authority shall within 30 working days declare its approval or disapproval of the plan of remedial measures. However, where the manufacturer can demonstrate, to the satisfaction of the competent type approval authority, that further time is required to investigate the non-compliance in order to submit a plan of remedial measures, an extension is granted.

6.3. The remedial measures shall apply to all vehicles likely to be affected by the same defect. The need to amend the type approval documents shall be assessed.

6.4. The manufacturer shall provide a copy of all communications related to the plan of remedial measures, and shall also maintain a record of the recall campaign, and supply regular status reports to the type approval authority.

6.5. The plan of remedial measures shall include the requirements specified in paragraphs 6.5.1. to 6.5.11. The manufacturer shall assign a unique identifying name or number to the plan of remedial measures.

6.5.1. A description of each vehicle type included in the plan of remedial measures.

6.5.2. A description of the specific modifications, alterations, repairs, corrections, adjustments, or other changes to be made to bring the vehicles into conformity including a brief summary of the data and technical studies which support the manufacturer's decision as to the particular measures to be taken to correct the non-conformity.

6.5.3. A description of the method by which the manufacturer informs the vehicle owners.

6.5.4. A description of the proper maintenance or use, if any, which the manufacturer stipulates as a condition of eligibility for repair under the plan of remedial measures, and an explanation of the manufacturer's reasons for imposing any such condition. No maintenance or use conditions may be imposed unless it is demonstrably related to the non-conformity and the remedial measures.

6.5.5. A description of the procedure to be followed by vehicle owners to obtain correction of the non-conformity. This shall include a date after which the remedial measures may be taken, the estimated time for the workshop to perform the repairs and where they can be done. The repair shall be done expediently, within a reasonable time after delivery of the vehicle.

6.5.6. A copy of the information transmitted to the vehicle owner.

6.5.7. A brief description of the system which the manufacturer uses to assure an adequate supply of component or systems for fulfilling the remedial action. It shall be indicated when there will be an adequate supply of components or systems to initiate the campaign.

6.5.8. A copy of all instructions to be sent to those persons who are to perform the repair.

6.5.9. A description of the impact of the proposed remedial measures on the emissions, fuel consumption, derivability, and safety of each vehicle type, covered by the plan of remedial measures with data, technical studies, etc. which support these conclusions.

6.5.10. Any other information, reports or data the type approval authority may reasonably determine is necessary to evaluate the plan of remedial measures.

6.5.11. Where the plan of remedial measures includes a recall, a description of the method for recording the repair shall be submitted to the type approval authority. If a label is used, an example of it shall be submitted.

6.6. The manufacturer may be required to conduct reasonably designed and necessary tests on components and vehicles incorporating a proposed change, repair, or modification to demonstrate the effectiveness of the change, repair, or modification.

6.7. The manufacturer is responsible for keeping a record of every vehicle recalled and repaired and the workshop which performed the repair. The type approval authority shall have access to the record on request for a period of 5 years from the implementation of the plan of remedial measures.

6.8. The repair and/or modification or addition of new equipment shall be recorded in a certificate supplied by the manufacturer to the vehicle owner.

Appendix 4

Statistical procedure for in-service conformity testing

1. This appendix describes the procedure to be used to verify the in-service conformity requirements for the Type I test.

2. Two different procedures are to be followed:

(i) One dealing with vehicles identified in the sample, due to an emission- related defect, causing outliers in the results (paragraph 3. below);

(ii) The other deals with the total sample (paragraph 4. below).

3. Procedure to be followed with outlying emitters in the sample

3.1. With a minimum sample size of three and a maximum sample size as determined by the procedure of paragraph 4., a vehicle is taken at random from the sample and the emissions of the regulated pollutants are measured to determine if it is an outlying emitter.

3.2. A vehicle is said to be an outlying emitter when the conditions given in paragraph 3.2.1. are met.

3.2.1. In the case of a vehicle that has been type-approved according to the limit values given in Table 1 in paragraph 5.3.1.4., an outlying emitter is a vehicle where the applicable limit value for any regulated pollutant is exceeded by a factor of 1.5.

3.2.2. In the specific case of a vehicle with a measured emission for any regulated pollutant within the "intermediate zone"[5].

3.2.2.1. If the vehicle meets the conditions of this paragraph, the cause of the excess emission must be determined and another vehicle is then taken at random from the sample.

3.2.2.2. Where more than one vehicle meets the condition of this paragraph, the Administrative Department and the manufacturer must determine if the excess emission from both vehicles is due to the same cause or not.

3.2.2.2.1. If the Administrative Department and the manufacturer both agree that the excess emission is due to the same cause, the sample is regarded as having failed and the plan of remedial measures outlined in paragraph 6. of Appendix 3 applies.

3.2.2.2.2. If the Administrative Department and the manufacturer can not agree on either the cause of the excess emission from an individual vehicle or whether the causes for more than one vehicle are the same, another vehicle is taken at random from the sample, unless the maximum sample size has already been reached.

3.2.2.3. When only one vehicle meeting the conditions of this paragraph has been found, or when more than one vehicle has been found and the Administrative Department and the manufacturer agree it is due to different causes, another vehicle is taken at random from the sample, unless the maximum sample size has already been reached.

3.2.2.4. If the maximum sample size is reached and not more than one vehicle meeting the requirements of this paragraph has been found where the excess emission is due to the same cause, the sample is regarded as having passed with regard to the requirements of paragraph 3. of this appendix.

3.2.2.5. If, at any time, the initial sample has been exhausted, another vehicle is added to the initial sample and that vehicle is taken.

3.2.2.6. Whenever another vehicle is taken from the sample, the statistical procedure of paragraph 4. of this appendix is applied to the increased sample.

3.2.3. In the specific case of a vehicle with a measured emission for any regulated pollutant within the "failure zone"[2].

3.2.3.1. If the vehicle meets the conditions of this paragraph, the Administrative Department shall determine the cause of the excess emission and another vehicle is then taken at random from the sample.

3.2.3.2. Where more than one vehicle meets the condition of this paragraph, and the Administrative Department determines that the excess emission is due to the same cause, the manufacturer shall be informed that the sample is regarded as having failed, together with the reasons for that decision, and the plan of remedial measures outlined in paragraph 6. of Appendix 3 applies.

3.2.3.3. When only one vehicle meeting the conditions of this paragraph has been found, or when more than one vehicle has been found and the Administrative Department has determined that it is due to different causes, another vehicle is taken at random from the sample, unless the maximum sample size has already been reached.

3.2.3.4. If the maximum sample size is reached and not more than one vehicle meeting the requirements of this paragraph has been found where the excess emission is due to the same cause, the sample is regarded as having passed with regard to the requirements of paragraph 3. of this appendix.

3.2.3.5. If, at any time, the initial sample has been exhausted, another vehicle is added to the initial sample and that vehicle is taken.

3.2.3.6. Whenever another vehicle is taken from the sample, the statistical procedure of paragraph 4. of this appendix is applied to the increased sample.

3.2.4. Whenever a vehicle is not found to be an outlying emitter, another vehicle is taken at random from the sample.

3.3. When an outlying emitter is found, the cause of the excess emission shall be determined.

3.4. When more than one vehicle is found to be an outlying emitter, due to the same cause, the sample is regarded as having failed.

3.5. When only one outlying emitter has been found, or when more than one outlying emitter is found, but due to different causes, the sample is increased by one vehicle, unless the maximum sample size has already been reached.

3.5.1. When in the increased sample more than one vehicle is found to be an outlying emitter, due to the same cause, the sample is regarded as having failed.

3.5.2. When in the maximum sample size not more than one outlying emitter is found, where the excess emission is due to the same cause, the sample is regarded as having passed with regard to the requirements of paragraph 3. of this appendix.

3.6. Whenever a sample is increased due to the requirements of paragraph 3.5., the statistical procedure of paragraph 4. below is applied to the increased sample.

4. Procedure to be followed without separate evaluation of outlying emitters in the sample

4.1. With a minimum sample size of three the sampling procedure is set so that the probability of a batch passing a test with 40 per cent of the production defective is 0,95 (producer's risk = 5 per cent) while the probability of a batch being accepted with 75 per cent of the production defective is 0,15 (consumer's risk = 15 per cent).

4.2. For each of the pollutants given in the Table 1of paragraph 5.3.1.4. of this Regulation, the following procedure is used (see Figure 4/2 below).

Where:
L	=	the limit value for the pollutant,
xi	=	the value of the measurement for the i-th vehicle of the sample,
n	=	the current sample number.

4.3. The test statistic quantifying the number of non-conforming vehicles, i.e. xi > L, is computed for the sample.

4.4. Then:

(i) If the test statistic does not exceed the pass decision number for the sample size given in the following table, a pass decision is reached for the pollutant;

(ii) If the test statistic equals or exceeds the fail decision number for the sample size given in the following table, a fail decision is reached for the pollutant;

(iii) Otherwise, an additional vehicle is tested and the procedure is applied to the sample with one extra unit.

In the following table the pass and fail decision numbers are computed in accordance with the International Standard ISO 8422:1991.

5. A sample is regarded as having passed the test when it has passed both the requirements of paragraphs 3. and 4. of this appendix.

Table 4/1

Table for acceptance/rejection sampling plan by attributes

Cumulative sample size (n)	Pass decision number	Fail decision number
3	0	-
4	1	-
5	1	5
6	2	6
7	2	6
8	3	7
9	4	8
10	4	8
11	5	9
12	5	9
13	6	10
14	6	11
15	7	11
16	8	12
17	8	12
18	9	13
19	9	13
20	11	12

Figure 4/1

In-service conformity checking - audit procedure

Appendix 6

Requirements for vehicles that use a reagent for the exhaust after-treatment system

1. Introduction

This annex sets out the requirements for vehicles that rely on the use of a reagent for the after-treatment system in order to reduce emissions.

2. Reagent indication

2.1. The vehicle shall include a specific indicator on the dashboard that informs the driver of low levels of reagent in the reagent storage tank and of when the reagent tank becomes empty.

3. Driver warning system

3.1. The vehicle shall include a warning system consisting of visual alarms that informs the driver when the reagent level is low, that the tank soon needs to be refilled, or the reagent is not of a quality specified by the manufacturer. The warning system may also include an audible component to alert the driver.

3.2. The warning system shall escalate in intensity as the reagent approaches empty. It shall culminate in a driver notification that can not be easily defeated or ignored. It shall not be possible to turn off the system until the reagent has been replenished.

3.3. The visual warning shall display a message indicating a low level of reagent. The warning shall not be the same as the warning used for the purposes of OBD or other engine maintenance. The warning shall be sufficiently clear for the driver to understand that the reagent level is low (e.g. "urea level low", "AdBlue level low", or "reagent low").

3.4. The warning system does not initially need to be continuously activated, however the warning shall escalate so that it becomes continuous as the level of the reagent approaches the point where the driver inducement system in paragraph 8. comes into effect. An explicit warning shall be displayed (e.g. "fill up urea"', "fill up AdBlue", or "fill up reagent"). The continuous warning system may be temporarily interrupted by other warning signals providing important safety related messages.

3.5. The warning system shall activate at a distance equivalent to a driving range of at least 2,400 km in advance of the reagent tank becoming empty.

4. Identification of incorrect reagent

4.1. The vehicle shall include a means of determining that a reagent corresponding to the characteristics declared by the manufacturer and recorded in Annex 1. to this Regulation is present on the vehicle.

4.2. If the reagent in the storage tank does not correspond to the minimum requirements declared by the manufacturer the driver warning system in paragraph 3. shall be activated and shall display a message indicating an appropriate warning (e.g. "incorrect urea detected", "incorrect AdBlue detected", or "incorrect reagent detected"). If the reagent quality is not rectified within 50 km of the activation of the warning system then the driver inducement requirements of paragraph 8. shall apply.

5. Reagent consumption monitoring

5.1. The vehicle shall include a means of determining reagent consumption and providing off-board access to consumption information.

5.2. Average reagent consumption and average demanded reagent consumption by the engine system shall be available via the serial port of the standard diagnostic connector. Data shall be available over the previous complete 2,400 km period of vehicle operation.

5.3. In order to monitor reagent consumption, at least the following parameters within the vehicle shall be monitored:

(a) The level of reagent in the on-vehicle storage tank;

(b) The flow of reagent or injection of reagent as close as technically possible to the point of injection into an exhaust after-treatment system.

5.4. A deviation of more than 50 per cent between the average reagent consumption and the average demanded reagent consumption by the engine system over a period of 30 minutes of vehicle operation, shall result in the activation of the driver warning system in paragraph 3., which shall display a message indicating an appropriate warning (e.g. "urea dosing malfunction", "AdBlue dosing malfunction", or "reagent dosing malfunction"). If the reagent consumption is not rectified within 50 km of the activation of the warning system then the driver inducement requirements of paragraph 8. shall apply.

5.5. In the case of interruption in reagent dosing activity the driver warning system as referred to in paragraph 3. shall be activated, which shall display a message indicating an appropriate warning. This activation shall not be required where the interruption is demanded by the engine ECU because the vehicle operating conditions are such that the vehicle's emission performance does not require reagent dosing, provided that the manufacturer has clearly informed the approval authority when such operating conditions apply. If the reagent dosing is not rectified within 50 km of the activation of the warning system then the driver inducement requirements of paragraph 8. shall apply.

6. Monitoring NOx emissions

6.1. As an alternative to the monitoring requirements in paragraphs 4. and 5., manufacturers may use exhaust gas sensors directly to sense excess NOx levels in the exhaust.

6.2. The manufacturer shall demonstrate that use of these sensors, and any other sensors on the vehicle, results in the activation of the driver warning system as referred to in paragraph 3., the display of a message indicating an appropriate warning (e.g. "emissions too high – check urea", "emissions too high – check AdBlue", "emissions too high – check reagent"), and the driver inducement system as referred to in paragraph 8.3., when the situations referred to in paragraph 4.2., 5.4. or 5.5. occur.

7. Storage of failure information

7.1. Where reference is made to this paragraph, a non-erasable Parameter Identifier (PID) shall be stored identifying the reason for the inducement system activation. The vehicle shall retain a record of the PID and the distance travelled by the vehicle during the inducement system activation for at least 800 days or 30,000 km of vehicle operation. The PID shall be made available via the serial port of a standard diagnostic connector upon request of a generic scan tool.

7.2. Malfunctions in the reagent dosing system attributed to technical failures (e.g. mechanical or electrical faults) shall also be subject to the OBD requirements in Annex 11.

8. Driver inducement system

8.1. The vehicle shall include a driver inducement system to ensure that the vehicle operates with a functioning emissions control system at all times. The inducement system shall be designed so as to ensure that the vehicle can not operate with an empty reagent tank.

8.2. The inducement system shall activate at the latest when the level of reagent in the tank reaches a level equivalent to the average driving range of the vehicle with a complete tank of fuel. The system shall also activate when the failures in paragraphs 4., 5. or 6. have occurred, depending on the NOx monitoring approach. The detection of an empty reagent tank and the failures mentioned in paragraphs 4., 5. or 6. shall result in the failure information storage requirements of paragraph 7. coming into effect.

8.3. The manufacturer shall select which type of inducement system to install. The options for a system are described in paragraphs 8.3.1., 8.3.2., 8.3.3. and 8.3.4.

8.3.1. A "no engine restart after countdown" approach allows a countdown of restarts or distance remaining once the inducement system activates. Engine starts initiated by the vehicle control system, such as start-stop systems, are not included in this countdown. Engine restarts shall be prevented immediately after the reagent tank becomes empty or a distance equivalent to a complete tank of fuel has been exceeded since the activation of the inducement system, whichever occurs earlier.

8.3.2. A "no start after refuelling" system results in a vehicle being unable to start after re-fuelling if the inducement system has activated.

8.3.3. A "fuel-lockout" approach prevents the vehicle from being refuelled by locking the fuel filler system after the inducement system activates. The lockout system shall be robust to prevent it being tampered with.

8.3.4. A "performance restriction" approach restricts the speed of the vehicle after the inducement system activates. The level of speed limitation shall be noticeable to the driver and significantly reduce the maximum speed of the vehicle. Such limitation shall enter into operation gradually or after an engine start. Shortly before engine restarts are prevented, the speed of the vehicle shall not exceed 50 km/h. Engine restarts shall be prevented immediately after the reagent tank becomes empty or a distance equivalent to a complete tank of fuel has been exceeded since the activation of inducement system, whichever occurs earlier.

8.4. Once the inducement system has fully activated and disabled the vehicle, the inducement system shall only be deactivated if the quantity of reagent added to the vehicle is equivalent to 2,400 km average driving range, or the failures specified in paragraphs 4., 5., or 6. have been rectified. After a repair has been carried out to correct a fault where the OBD system has been triggered under paragraph 7.2., the inducement system may be reinitialised via the OBD serial port (e.g. by a generic scan tool) to enable the vehicle to be restarted for self-diagnosis purposes. The vehicle shall operate for a maximum of 50 km to enable the success of the repair to be validated. The inducement system shall be fully reactivated if the fault persists after this validation.

8.5. The driver warning system referred to in paragraph 3. shall display a message indicating clearly:

(a) The number of remaining restarts and/or the remaining distance; and

(b) The conditions under which the vehicle can be restarted.

8.6. The driver inducement system shall be deactivated when the conditions for its activation have ceased to exist. The driver inducement system shall not be automatically deactivated without the reason for its activation having been remedied.

8.7. Detailed written information fully describing the functional operation characteristics of the driver inducement system shall be provided to the approval authority at the time of approval.

8.8. As part of the application for type approval under this Regulation, the manufacturer shall demonstrate the operation of the driver warning and inducement systems.

9. Information requirements

9.1. The manufacturer shall provide all owners of new vehicles written information about the emission control system. This information shall state that if the vehicle emission control system is not functioning correctly, the driver shall be informed of a problem by the driver warning system and that the driver inducement system shall consequentially result in the vehicle being unable to start.

9.2. The instructions shall indicate requirements for the proper use and maintenance of vehicles, including the proper use of consumable reagents.

9.3. The instructions shall specify if consumable reagents have to be refilled by the vehicle operator between normal maintenance intervals. They shall indicate how the driver should refill the reagent tank. The information shall also indicate a likely rate of reagent consumption for that type of vehicle and how often it should be replenished.

9.4. The instructions shall specify that use of, and refilling of, a required reagent of the correct specifications is mandatory for the vehicle to comply with the certificate of conformity issued for that vehicle type.

9.5. The instructions shall state that it may be a criminal offence to use a vehicle that does not consume any reagent if it is required for the reduction of emissions.

9.6. The instructions shall explain how the warning system and driver inducement systems work. In addition, the consequences of ignoring the warning system and not replenishing the reagent shall be explained.

10. Operating conditions of the after-treatment system

Manufacturers shall ensure that the emission control system retains its emission control function during all ambient conditions, especially at low ambient temperatures. This includes taking measures to prevent the complete freezing of the reagent during parking times of up to 7 days at 258 K (-15 °C) with the reagent tank 50 per cent full. If the reagent has frozen, the manufacturer shall ensure that reagent shall be available for use within 20 minutes of the vehicle starting at 258 K (-15 °C) measured inside the reagent tank, so as to ensure correct operation of the emission control system.

Annex 1

Engine and vehicle characteristics and information concerning the conduct of tests

The following information, when applicable, shall be supplied in triplicate and include a list of contents.

If there are drawings, they shall be to an appropriate scale and show sufficient detail; they shall be presented in A4 format or folded to that format. Photographs, if any, shall show sufficient detail.

If the systems, components or separate technical units have electronic controls, information concerning their performance shall be supplied.

0. General

0.1. Make (name of undertaking):.......................................

0.2. Type:......................................................

0.2.1. Commercial name(s), if available:....................................

0.3. Means of identification of type, if marked on the vehicle [a]:...................

0.3.1. Location of that mark:...........................................

0.4. Category of vehicle [b]:...........................................

0.5. Name and address of manufacturer:...................................

0.8. Name(s) and address(es) of of assembly plant(s):..........................

0.9. Name and address of manufacturer's authorized representative

where appropriate:..........................................................

1. General construction characteristics of the vehicle

1.1. Photographs and/or drawings of a representative vehicle:.....................

1.3.3. Powered axles (number, position, interconnection):........................

2. Masses and dimensionsc (in kg and mm) (refer to drawing
where applicable)..............................................

2.6. Mass of the vehicle with bodywork and, in the case of a towing vehicle of category other than M1, with coupling device, if fitted by the manufacturer, in running order, or mass of the chassis or chassis with cab, without bodywork and/or coupling device if the manufacturer does not fit the bodywork and/or coupling device (including liquids, tools, spare wheel, if fitted, and driver and, for buses and coaches, a crew member if there is a crew seat in the vehicle)[d] (maximum and minimum for each variant):

2.8. Technically permissible maximum laden mass as stated by the manufacturere,*:

3. Description of energy converters and power plantf (In the case of a vehicle that can run either on petrol, diesel, etc., or also in combination with another fuel, items shall be repeated**)

3.1. Engine Manufacturer:............................................

3.1.1. Manufacturer's engine code (as marked on the engine, or other
means of identification):..........................................

3.2. Internal combustion engine: .......................................

3.2.1. Specific engine information:.......................................

3.2.1.1. Working principle: positive-ignition/compression-ignition,
four-stroke/two-stroke/rotary cycle1..................................

3.2.1.2. Number, arrangement of cylinders:...................................

3.2.1.2.1. Bore3:...................................................mm

3.2.1.2.2. Stroke3:..................................................mm

3.2.1.2.3. Firing order:..................................................

3.2.1.3. Engine capacity4:............................................cm3

3.2.1.4. Volumetric compression ratio2:.....................................

3.2.1.5. Drawings of combustion chamber and piston crown and, in the case of ...........

positive ignition engine, piston rings:.............................................

3.2.1.6. Normal engine idling speed2:.......................................

3.2.1.6.1. High idle engine speed2:..........................................

3.2.1.7. Carbon monoxide content by volume in the exhaust gas with
the engine idling (according to the manufacturer's

specifications, positive ignition engines only)2..................................per cent

3.2.1.8. Maximum net power2:............ kW at..............................min-1

3.2.1.9. Maximum permitted engine speed as prescribed by the manufacturer: ........min-1

3.2.1.10. Maximum net torqueg:………………Nm at: .........................min-1

(manufacturer's declared value)

3.2.2. Fuel: diesel/petrol/LPG/NG-Biomethane/Ethanol (E85)/Biodiesel/Hydrogen1......

3.2.2.2. Research octane number (RON), unleaded:.............................

3.2.2.3. Fuel tank inlet: restricted orifice/label1...............................

3.2.2.4. Vehicle fuel type: Mono fuel/Bi-fuel/Flex-fuel1..........................

3.2.2.5. Maximum amount of biofuel acceptable in fuel (manufacturer's declared value):per cent by volume

3.2.4. Fuel feed

3.2.4.2. By fuel injection (compression-ignition only): yes/no1

3.2.4.2.1. System description:............................................

3.2.4.2.2. Working principle: direct-injection/pre-chamber/swirl Chamber1..............

3.2.4.2.3. Injection pump

3.2.4.2.3.1. Make(s):...................................................

3.2.4.2.3.2. Type(s):....................................................

3.2.4.2.3.3. Maximum fuel delivery1, 2...........mm3 stroke or cycle at an engine
speed of:1, 2...........min-1 or characteristic diagram:.......................

3.2.4.2.3.5. Injection advance curve:2........................................

3.2.4.2.4. Governor

3.2.4.2.4.2. Cut-off point:................................................

3.2.4.2.4.2.1. Cut-off point under load:......................................min-1

3.2.4.2.4.2.2. Cut-off point without load:.....................................min-1

3.2.4.2.6. Injector(s):..................................................

3.2.4.2.6.1. Make(s):...................................................

3.2.4.2.6.2. Type(s):....................................................

3.2.4.2.7. Cold start system..............................................

3.2.4.2.7.1. Make(s):...................................................

3.2.4.2.7.2. Type(s):....................................................

3.2.4.2.7.3. Description:.................................................

3.2.4.2.8. Auxiliary starting aid

3.2.4.2.8.1. Make(s):...................................................

3.2.4.2.8.2. Type(s):....................................................

3.2.4.2.8.3. System description:............................................

_______________

g Determined in accordance with the requirements of Regulation No. 85.

3.2.4.2.9. Electronic controlled injection: yes/no1...............................

3.2.4.2.9.1. Make(s):...................................................

3.2.4.2.9.2. Type(s):....................................................

3.2.4.2.9.3. Description of the system, in the case of systems other than continuous
injection, give equivalent details:...................................

3.2.4.2.9.3.1. Make and type of the control unit:...................................

3.2.4.2.9.3.2. Make and type of the fuel regulator:.................................

3.2.4.2.9.3.3. Make and type of air-flow sensor:...................................

3.2.4.2.9.3.4. Make and type of fuel distributor:...................................

3.2.4.2.9.3.5. Make and type of throttle housing:..................................

3.2.4.2.9.3.6. Make and type of water temperature sensor:............................

3.2.4.2.9.3.7. Make and type of air temperature sensor:..............................

3.2.4.2.9.3.8. Make and type of air pressure sensor:................................

3.2.4.3. By fuel injection (positive-ignition only): yes/no1

3.2.4.3.1. Working principle: intake manifold (single/multi-point)/direct
injection/other (specify).........................................

3.2.4.3.2. Make(s):...................................................

3.2.4.3.3. Type(s):....................................................

3.2.4.3.4. System description, in the case of systems other than continuous injection
give equivalent details:..........................................

3.2.4.3.4.1. Make and type of the control unit:...................................

3.2.4.3.4.2. Make and type of the fuel regulator:.................................

3.2.4.3.4.3. Make and type of the air-flow sensor:................................

3.2.4.3.4.6. Make and type of the micro-switch:..................................

3.2.4.3.4.8. Make and type of the throttle housing:................................

3.2.4.3.4.9. Make and type of the water temperature sensor:..........................

3.2.4.3.4.10. Make and type of the air temperature sensor:............................

3.2.4.3.5. Injectors: Opening pressure:1, 2..................................kPa

or characteristic diagram:........................................

3.2.4.3.5.1. Make(s):...................................................

3.2.4.3.5.2. Type(s):....................................................

3.2.4.3.6. Injection timing:..............................................

3.2.4.3.7. Cold start system:.............................................

3.2.4.3.7.1. Operating principle(s):..........................................

3.2.4.3.7.2. Operating limits/settings1, 2.......................................

3.2.4.4. Feed pump..................................................

3.2.4.4.1. Pressure1, 2.......kPa or characteristic diagram:..........................

3.2.5. Electrical system..............................................

3.2.5.1. Rated voltage: ……………………. V, positive/negative ground1

3.2.5.2. Generator

3.2.5.2.1. Type:......................................................

3.2.5.2.2. Nominal output: ……………VA

3.2.6. Ignition....................................................

3.2.6.1. Make(s):...................................................

3.2.6.2. Type(s):....................................................

3.2.6.3. Working principle:.............................................

3.2.6.4. Ignition advance curve:2.........................................

3.2.6.5. Static ignition timing:2........degrees before TDC.........................

3.2.7. Cooling system: liquid/air1.......................................

3.2.7.1. Nominal setting of the engine temperature control mechanism:................

3.2.7.2. Liquid

3.2.7.2.1. Nature of liquid:..............................................

3.2.7.2.2. Circulating pump(s):yes/no1

3.2.7.2.3. Characteristics:.............................................,or

3.2.7.2.3.1. Make(s): ...................................................

3.2.7.2.3.2. Type(s): ...................................................

3.2.7.2.4. Drive ratio(s): ................................................

3.2.7.2.5. Description of the fan and its drive mechanism: .........................

3.2.7.3. Air

3.2.7.3.1. Blower: yes/no1

3.2.7.3.2. Characteristics: ............................................, or

3.2.7.3.2.1. Make(s):...................................................

3.2.7.3.2.2. Type(s):....................................................

3.2.7.3.3. Drive ratio(s):................................................

3.2.8. Intake system:................................................

3.2.8.1. Pressure charger: yes/no1........................................

3.2.8.1.1. Make(s):...................................................

3.2.8.1.2. Type(s):....................................................

3.2.8.1.3. Description of the system (maximum charge pressure:...................kPa,

waste-gate, if applicable).........................................

3.2.8.2. Inter-cooler: yes/no1............................................

3.2.8.2.1. Type: air-air / air-water1

3.2.8.3. Intake depression at rated engine speed and at 100 per cent load (compression ignition engines only)

Minimum allowable:......................................... kPa

Maximum allowable:........................................ kPa

3.2.8.4. Description and drawings of inlet pipes and their accessories
(plenum chamber, heating device, additional air intakes, etc.):................

3.2.8.4.1. Intake manifold description (drawings and/or photographs):..................

3.2.8.4.2. Air filter, drawings:............................................ , or

3.2.8.4.2.1. Make(s):...................................................

3.2.8.4.2.2. Type(s):....................................................

3.2.8.4.3. Intake silencer, drawings........................................ , or

3.2.8.4.3.1. Make(s):...................................................

3.2.8.4.3.2. Type(s):....................................................

3.2.9. Exhaust system...............................................

3.2.9.1. Description and/or drawing of the exhaust manifold:.......................

3.2.9.2. Description and/or drawing of the exhaust system:........................

3.2.9.3. Maximum allowable exhaust back pressure at rated engine speed and at 100 per cent load (compression ignition engines only): kPa

3.2.9.10. Minimum cross-sectional areas of inlet and outlet ports: ....................

3.2.11. Valve timing or equivalent data:....................................

3.2.11.1. Maximum lift of valves, angles of opening and closing, or timing details
of alternative distribution systems, in relation to dead centres
(for variable timing system, minimum and maximum timing):................

3.2.11.2. Reference and/or setting ranges:1, 2.................................

3.2.12. Measures taken against air pollution:.................................

3.2.12.1. Device for recycling crankcase gases (description and drawings):..............

3.2.12.2. Additional pollution control devices (if any, and if not covered

by another heading:............................................

3.2.12.2.1. Catalytic converter: yes/no1.......................................

3.2.12.2.1.1. Number of catalytic converters and elements (provide the information below for each separate unit:

3.2.12.2.1.2. Dimensions and shape of the catalytic converter(s) (volume,...):...............

3.2.12.2.1.3. Type of catalytic action:.........................................

3.2.12.2.1.4. Total charge of precious metal:.....................................

3.2.12.2.1.5. Relative concentration:..........................................

3.2.12.2.1.6. Substrate (structure and material):...................................

3.2.12.2.1.7. Cell density:.................................................

3.2.12.2.1.8. Type of casing for catalytic converter(s):..............................

3.2.12.2.1.9. Positioning of the catalytic converter(s) (place and reference distances
in the exhaust system):..........................................

3.2.12.2.1.10. Heat shield: yes/no1

3.2.12.2.1.11. Regeneration systems/method of exhaust after-treatment systems,
description:..................................................

3.2.12.2.1.11.1. The number of Type I operating cycles, or equivalent engine
test bench cycles, between two cycles where regenerative
phases occur under the conditions equivalent to Type I test
(Distance "D" in figure 1 in Annex 13:................................

3.2.12.2.1.11.2 Description of method employed to determine the number of cycles
Between two cycles where regenerative phases occur:......................

3.2.12.2.1.11.3. Parameters to determine the level of loading required before regeneration

occurs (i.e. temperature, pressure etc.):...............................................................

3.2.12.2.1.11.4. Description of method used to load system in the test procedure described

in paragraph 3.1., Annex 13:.........................................................................

3.2.12.2.1.11.5. Normal operating temperature range (K):..............................

3.2.12.2.1.11.6. Consumable reagents (where appropriate):.............................

3.2.12.2.1.11.7. Type and concentration of reagent needed for catalytic action
(where appropriate):............................................

3.2.12.2.1.11.8. Normal operational temperature range of reagent (where appropriate): ..........

3.2.12.2.1.11.9 International standard (where appropriate): ............................

3.2.12.2.1.11.10. Frequency of reagent refill: continuous/maintenance1 (where appropriate): .......

3.2.12.2.1.12. Make of catalytic converter: ......................................

3.2.12.2.1.13. Identifying part number: .........................................

3.2.12.2.2. Oxygen sensor:yes/no1..........................................

3.2.12.2.2.1. Type......................................................

3.2.12.2.2.2. Location of oxygen sensor:.......................................

3.2.12.2.2.3. Control range of oxygen sensor:2...................................

3.2.12.2.2.4. Make of oxygen sensor:.........................................

3.2.12.2.2.5. Identifying part number:.........................................

3.2.12.2.3. Air injection: yes/no1...........................................

3.2.12.2.3.1. Type (pulse air, air pump, etc...):....................................

3.2.12.2.4. Exhaust gas recirculation (EGR): yes/no1..............................

3.2.12.2.4.1. Characteristics (flow rate, etc...):....................................

3.2.12.2.4.2. Water cooled system: yes/no1.....................................

3.2.12.2.5. Evaporative emission control system.yes/no1:...........................

3.2.12.2.5.1. Detailed description of the devices and their state of tune:...................

3.2.12.2.5.2. Drawing of the evaporative control system:.............................

3.2.12.2.5.3. Drawing of the carbon canister:....................................

3.2.12.2.5.4. Mass of dry charcoal:..........................................g

3.2.12.2.5.5. Schematic drawing of the fuel tank with indication of capacity and material:.......

3.2.12.2.5.6. Drawing of the heat shield between tank and exhaust system:.................

3.2.12.2.6. Particulate trap: yes/no1

3.2.12.2.6.1. Dimensions and shape of the particulate trap (capacity):

3.2.12.2.6.2. Type and design of particulate trap and design:..........................

3.2.12.2.6.3. Location of the particulate trap (reference distances in the exhaustline):..........

3.2.12.2.6.4. Regeneration system/method. Description and/or drawing:...................

3.2.12.2.6.4.1. The number of Type I operating cycles, or equivalent engine test bench cycle, between two cycles where regeneration phases occur under the conditions equivalent to Type I test (Distance 'D' in figure 1 in Annex 13):..........................................................

3.2.12.2.6.4.2. Description of method employed to determine the number of cycles between two cycles where regenerative phases occur:

3.2.12.2.6.4.3. Parameters to determine the level of loading required before regeneration occurs (i.e. temperature, pressure, etc.):

3.2.12.2.6.4.4. Description of method used to load system in the test procedure described in paragraph 3.1., Annex 13:

3.2.12.2.6.5. Make of particulate trap:.........................................

3.2.12.2.6.6. Identifying part number:.........................................

3.2.12.2.7. On-board-diagnostic (OBD) system: (yes/no)1..........................

3.2.12.2.7.1. Written description and/or drawing of the malfunction indicator (MI):...........

3.2.12.2.7.2. List and purpose of all components monitored by the OBD system:.............

3.2.12.2.7.3. Written description (general working principles) for:......................

3.2.12.2.7.3.1. Positive-ignition engines

3.2.12.2.7.3.1.1. Catalyst monitoring:............................................

3.2.12.2.7.3.1.2. Misfire detection:..............................................

3.2.12.2.7.3.1.3. Oxygen sensor monitoring:.......................................

3.2.12.2.7.3.1.4. Other components monitored by the OBD system:........................

3.2.12.2.7.3.2. Compression-ignition engines

3.2.12.2.7.3.2.1. Catalyst monitoring:............................................

3.2.12.2.7.3.2.2. Particulate trap monitoring:.......................................

3.2.12.2.7.3.2.3. Electronic fuelling system monitoring:................................

3.2.12.2.7.3.2.4. Other components monitored by the OBD system:........................

3.2.12.2.7.4. Criteria for MI activation (fixed number of driving cycles or statistical method):....

3.2.12.2.7.5. List of all OBD output codes and formats used (with explanation of each):........

3.2.12.2.7.6. The following additional information must be provided by the vehicle manufacturer for the purposes of enabling the manufacture of OBD-compatible replacement or service parts and diagnostic tools and test equipment, unless such information is covered by intellectual property rights or constitutes specific know-how of the manufacturer or the OEM supplier(s).

3.2.12.2.7.6.1. A description of the type and number of the pre-conditioning cycles used for the original type approval of the vehicle.

3.2.12.2.7.6.2. A description of the type of the OBD demonstration cycle used for the original type-approval of the vehicle for the component monitored by the OBD system.

3.2.12.2.7.6.3. A comprehensive document describing all sensed components with the strategy for fault detection and MI activation (fixed number of driving cycles or statistical method), including a list of relevant secondary sensed parameters for each component monitored by the OBD system. A list of all OBD output codes and format used (with an explanation of each) associated with individual emission related power-train components and individual non-emission related components, where monitoring of the component is used to determine MI activation. In particular, a comprehensive explanation for the data given in service $05 Test ID $21 to FF and the data given in service $06 must be provided. In the case of vehicle types that use a communication link in accordance with ISO 15765-4 "Road vehicles – Diagnostics on Controller Area Network (CAN) – Part 4: Requirements for emissions-related systems", a comprehensive explanation for the data given in service $06 Test ID $00 to FF, for each OBD monitor ID supported, must be provided.

3.2.12.2.7.6.4. The information required by this paragraph may, for example, be defined by completing a table as follows, which shall be attached to this annex:

Component	Fault code	Monitoring strategy	Fault detection criteria	MI activation criteria	Secondary parameters	Preconditioning	Demonstration test
Catalyst	P0420	Oxygen sensor 1 and 2 signals	Difference between sensor 1 and sensor 2 signals	3rd cycle	Engine speed, engine load, A/F mode, catalyst temperature	Two Type I cycles	Type I

3.2.12.2.8. Other systems (description and operation): .............................

3.2.13. Location of the absorption coefficient symbol (compression ignition engines only):..

3.2.14. Details of any devices designed to influence fuel economy (if not covered by other items):

3.2.15. LPG fuelling system: yes/no1......................................

3.2.15.1. Approval number (approval number of Regulation No. 67):..................

3.2.15.2. Electronic engine management control unit for LPG fuelling

3.2.15.2.1. Make(s):...................................................

3.2.15.2.2. Type(s):....................................................

3.2.15.2.3. Emission-related adjustment possibilities:..............................

3.2.15.3. Further documentation:..........................................

3.2.15.3.1. Description of the safeguarding of the catalyst at switch-over from petrol to LPG or back:

3.2.15.3.2. System layout (electrical connections, vacuum connections, compensation hoses, etc.)

3.2.15.3.3. Drawing of the symbol:...........................................

3.2.16. NG fuelling system: yes/no1

3.2.16.1. Approval number (approval number of Regulation No. 110):..................

3.2.16.2. Electronic engine management control unit for NG fuelling

3.2.16.2.1. Make(s):.....................................................

3.2.16.2.2. Type(s):.....................................................

3.2.16.2.3. Emission-related adjustment possibilities:...............................

3.2.16.3. Further documentation:...........................................

3.2.16.3.1. Description of the safeguarding of the catalyst at switch-over from petrol to NG or back:

3.2.16.3.2. System layout (electrical connections, vacuum connections, compensation
hoses, etc.):...................................................

3.2.16.3.3. Drawing of the symbol:...........................................

3.4. Engines or motor combinations

3.4.1. Hybrid Electric Vehicle:......................................yes/no1

3.4.2. Category of Hybrid Electric vehicle
Off Vehicle Charging/Not Off Vehicle Charging1..........................

3.4.3. Operating mode switch:……………. with/without1........................

3.4.3.1. Selectable modes...............................................

3.4.3.1.1. Pure electric:..............................................yes/no1

3.4.3.1.2. Pure fuel consuming:........................................yes/no1

3.4.3.1.3. Hybrid modes:............................................yes/no1

(if yes, short description)..........................................

3.4.4. Description of the energy storage device: (battery, capacitor,

flywheel/generator...)............................................

3.4.4.1. Make(s):.....................................................

3.4.4.2. Type(s):.....................................................

3.4.4.3. Identification number:............................................

3.4.4.4. Kind of electrochemical couple:.....................................

3.4.4.5. Energy: .......... (for battery: voltage and capacity Ah in 2 h, for capacitor: J, ..).......

3.4.4.6. Charger: on board/external/without1

3.4.5. Electric machines (describe each type of electric machine separately)

3.4.5.1. Make:.......................................................

3.4.5.2. Type: ......................................................

3.4.5.3. Primary use: traction motor/generator

3.4.5.3.1. When used as traction motor: monomotor/multimotors (number):...............

3.4.5.4. Maximum power: ........................ kW

3.4.5.5. Working principle:..............................................

3.4.5.5.1. Direct current/alternating current/number of phases:........................

3.4.5.5.2. Separate excitation/series/compound1..................................

3.4.5.5.3. Synchronous/asynchronous1........................................

3.4.6. Control unit...................................................

3.4.6.1. Make:.......................................................

3.4.6.2. Type:.......................................................

3.4.6.3. Identification number:............................................

3.4.7. Power controller................................................

3.4.7.1. Make:.......................................................

3.4.7.2. Type:.......................................................

3.4.7.3. Identification number:............................................

3.4.8. Vehicle electric range ...... km (according Annex 7 of Regulation No.101):.........

3.4.9. Manufacturer’s recommendation for preconditioning:

3.6. Temperatures permitted by the manufacturer

3.6.1. Cooling system

3.6.1.1. Liquid cooling

3.6.1.1.1. Maximum temperature at outlet: …… K

3.6.1.2. Air cooling

3.6.1.2.1. Reference point:................................................

3.6.1.2.2. Maximum temperature at reference point: …… K

3.6.2. Maximum outlet temperature of the inlet intercooler: …… K

3.6.3. Maximum exhaust temperature at the point in the exhaust pipe(s) adjacent to the outer flange(s) of the exhaust manifold: …… K

3.6.4. Fuel temperature

3.6.4.1. Minimum: …… K

3.6.4.2. Maximum: …… K

3.6.5. Lubricant temperature

3.6.5.1. Minimum: …... K

3.6.5.2. Maximum: …… K

3.8. Lubrication system

3.8.1. Description of the system

3.8.1.1. Position of the lubricant reservoir: ....................................

3.8.1.2. Feed system (by pump/injection into intake/mixing with fuel, etc.)1

3.8.2. Lubricating pump

3.8.2.1. Make(s):.....................................................

3.8.2.2. Type(s):.....................................................

3.8.3. Mixture with fuel

3.8.3.1. Percentage: ...................................................

3.8.4. Oil cooler: yes/no1

3.8.4.1. Drawing(s):................................................., or

3.8.4.1.1. Make(s):.....................................................

3.8.4.1.2. Type(s):.....................................................

4. Transmission [h]

4.3. Moment of inertia of engine flywheel: .................................

4.3.1. Additional moment of inertia with no gear engaged:........................

4.4. Clutch (type):.................................................

4.4.1. Maximum torque conversion:.......................................

4.5. Gearbox:.....................................................

4.5.1. Type (manual/automatic/CVT (continuously variable transmission)1.............

4.6. Gear ratios...................................................

Index	Internal gearbox ratios (ratios of engine to gearbox output shaft revolutions)	Final drive ratios (ratio of gearbox output shaft to driven wheel revolutions)	Total gear ratios
Maximum for CVT*
1
2
3
4, 5, others
Minimum for CVT[6]
Reverse

* CVT - Continuously variable transmission

6. Suspension...................................................

6.6. Tyres and wheels...............................................

6.6.1. Tyre / wheel combination(s)

(a) For all tyre options indicate size designation, load-capacity index,
speed category symbol;

(b) For tyres of category Z intended to be fitted on vehicles whose
maximum speed exceeds 300 km/h equivalent information shall be
provided; for wheels indicate rim size(s) and off-set(s).

6.6.1.1. Axles

6.6.1.1.1. Axle 1:.....................................................

6.6.1.1.2. Axle 2:.....................................................

6.6.1.1.3. Axle 3:.....................................................

6.6.1.1.4. Axle 4:...................................................etc.

6.6.2. Upper and lower limit of rolling radii/circumference5:......................

6.6.2.1. Axles

6.6.2.1.1. Axle 1:.....................................................

6.6.2.1.2. Axle 2:.....................................................

6.6.2.1.3. Axle 3:.....................................................

6.6.2.1.4. Axle 4:...................................................etc.

6.6.3. Tyre pressure(s) recommended by the manufacturer:.....................kPa

9. Bodywork

9.1. Type of bodywork [i]:............................................

9.10.3. Seats

9.10.3.1. Number:....................................................

Annex 2

Communication

(maximum format: A4 (210 x 297 mm))

concerning:[2] APPROVAL GRANTED

APPROVAL EXTENDED

APPROVAL REFUSED

APPROVAL WITHDRAWN

PRODUCTION DEFINITELY DISCONTINUED

of a vehicle type with regard to the emission of gaseous pollutants by the engine pursuant to Regulation No. 83, 06 series of amendments

Approval No. ………. Extension No. ……………………………

Reason for extension :……………………

Section I

0.1. Make (trade name of manufacturer): .............................

0.2. Type: .................................................

0.2.1. Commercial name(s) (if available): ..............................

0.3. Means of identification of type if marked on the vehiclea

0.3.1. Location of that marking: ....................................

0.4. Category of vehicleb

0.5. Name and address of manufacturer: ..............................

0.8. Name(s) and address(es) of assembly plant(s): ......................

0.9. If applicable, name and address of manufacturer's representative: ..........

Section II

1. Additional information (where applicable): (see addendum)

2. Technical service responsible for carrying out the tests: ..............

3. Date of test report: ......................................

4. Number of test report: ....................................

5. Remarks (if any): (see addendum)

6. Place:...............................................

7. Date:................................................

8. Signature:............................................

Attachments: 1. Information package.

2. Test report.

Addendum to Type approval Communication No … concerning the type approval of a vehicle with regard to exhaust emissions pursuant to Regulation No. 83, 06 series of amendments

1. Additional information

1.1. Mass of the vehicle in running order: ..........................

1.2. Reference mass of the vehicle:...............................

1.3. Maximum mass of the vehicle:...............................

1.4. Number of seats (including the driver):.........................

1.6. Type of bodywork:

1.6.1. For M1, M2: saloon/ hatchback/ station wagon/coupé/convertible
/multipurpose vehicle2

1.6.2. For N1, N2: lorry, van2

1.7. Drive wheels: front, rear, 4 x 42

1.8. Pure electric vehicle: yes/no2

1.9. Hybrid electric vehicle: yes/no2

1.9.1. Category of Hybrid Electric vehicle: Off Vehicle Charging (OVC)/Not Off Vehicle charging (NOVC)2

1.9.2. Operating mode switch: with/without2

1.10. Engine identification:.....................................

1.10.1. Engine displacement:.....................................

1.10.2. Fuel supply system: direct injection/indirect injection2

1.10.3. Fuel recommended by the manufacturer:........................

1.10.4. Maximum power: ……………………… kW at....................min-1

1.10.5. Pressure charging device: yes/no2

1.10.6. Ignition system: compression ignition / positive ignition2

1.11. Power train (for pure electric vehicle or hybrid electric vehicle)2

1.11.1. Maximum net power: ………kW, at: ……………… to ...............min-1

1.11.2. Maximum thirty minutes power:..............................kW

1.12. Traction battery (for pure electric vehicle or hybrid electric vehicle)

1.12.1. Nominal voltage:........................................V

1.12.2. Capacity (2 h rate):......................................Ah

1.13. Transmission

1.13.1. Manual or automatic or continuously variable transmission:2, 3.........

1.13.2. Number of gear ratios:....................................

1.13.3. Total gear ratios (including the rolling circumferences of the tyres under load): road speeds per 1,000 min-1 (km/h)

First gear: ……………………………Sixth gear:...................

Second gear: …………………………Seventh gear:.................

Third gear: …………………………Eighth gear:...................

Fourth gear: …………………………Overdrive:...................

Fifth gear:............................................

1.13.4. Final drive ratio: ........................................

1.14. Tyres: ...............................................

1.14.1. Type: ...............................................

1.14.2. Dimensions:...........................................

1.14.3. Rolling circumference under load:............................

1.14.4. Rolling circumference of tyres used for the Type I test

2. Test results

2.1. Tailpipe emissions test results:...............................

Emissions classification: 06 series of amendments

Type approval number if not parent vehicle2:

Type I Result	Test	CO (mg/km)	THC (mg/km)	NMHC (mg/km)	NOx (mg/km)	THC+NOx (mg/km)	Particulates (mg/km)	Particles (#/km)
Measured(i) (iv)	1
	2
	3
Measured mean value (M) (i) (iv)
Ki (i) (v)						(ii)
Mean value calculated with Ki (M.Ki) (iv)						(iii)
DF (i) (v)
Final mean value calculated with Ki and DF (M.Ki.DF) (vi)
Limit value

(i) Where applicable

(ii) Not applicable

(iii) Mean value calculated by adding mean values (M.Ki) calculated for THC and NOx

(iv) Round to 2 decimal places

(v) Round to 4 decimal places

(vi) Round to 1 decimal place more than limit value

Position of the engine cooling fan during the test:

Height of the lower edge above ground:......................... cm

Lateral position of fan centre:................................ cm

Right/left of vehicle centre-line2

Information about regeneration strategy

D - Number of operating cycles between two (2) cycles where regenerative
phases occur:

d - Number of operating cycles required for regeneration:.............

Type II:.........................................per cent

Type III:.............................................

Type IV:..........................................g/test

Type V: Durability test type: whole vehicle test/bench ageing test/none2

- Deterioration factor DF: calculated/assigned2

- Specify the values (DF): .........................

Type VI:

Type VI	CO (mg/km)	THC (mg/km)
Measured value

2.1.1. Repeat the table for mono fuel gas vehicles for all reference gases of LPG or NG/biomethane, showing if results are measured or calculated. In the case of a bi-fuel gas vehicle designed to run either on petrol or on LPG or NG/biomethane: repeat for petrol and all reference gases of LPG or NG/biomethane, showing if the result are measured or calculated and repeat the table for the (one) final result of the vehicle emissions on LPG or NG/biomethane. In the case of other bi-fuel and flex fuel vehicles, show the results on the two different reference fuels.

OBD test

2.1.2. Written description and/or drawing of the malfunction indicator (MI):.....

2.1.3. List and function of all components monitored by the OBD system:......

2.1.4. Written description (general working principles) for:................

2.1.4.1. Misfire detectionc:.......................................

2.1.4.2. Catalyst monitoringc:.....................................

2.1.4.3. Oxygen sensor monitoringc:................................

2.1.4.4. Other components monitored by the OBD systemc:.................

2.1.4.5. Catalyst monitoringd:.....................................

2.1.4.6. Particulate trap monitoringd:................................

2.1.4.7. Electronic fuelling system actuator monitoringd:...................

2.1.4.8. Other components monitored by the OBD system:..................

2.1.5. Criteria for MI activation (fixed number of driving cycles or statistical method):.....

2.1.6. List of all OBD output codes and formats used
(with explanation of each):.................................

2.2. Emissions data required for roadworthiness testing

Test

CO value
(per cent vol.)

Lambda1

Engine speed

(min -1)

Engine oil temperature

(°C)

Low idle test

N/A

High idle test

1 Lambda formula: see paragraph 5.3.7.3. of this Regulation.

2.3. Catalytic converters: yes/no2

2.3.1. Original equipment catalytic converter tested to all relevant requirements of this Regulation yes/no2

2.4. Smoke opacity test resultse, 2

2.4.1. At steady speeds: See technical service test report number.............

2.4.2. Free acceleration tests

2.4.2.1. Measured value of the absorption coefficient:....................m-1

2.4.2.2. Corrected value of the absorption coefficient:....................m-1

2.4.2.3. Location of the absorption coefficient symbol on the vehicle:...........

4. Remarks:

________________

c For compression-ignition engine vehicles.

d For vehicles equipped with positive-ignition engines.

e Smoke opacity measurements to be carried out according to provisions laid out in Regulation No. 24.

_______________

1 Distinguishing number of the country which has granted/extended/refused/withdrawn the approval (see approval provisions in the Regulation).

2 Delete or strike out what does not apply (there are cases where nothing needs to be deleted when more than one entry is applicable).

3 In the case of vehicles equipped with automatic-shift gearboxes, give all pertinent technical data.

Annex 4a

Type I Test

(Verifying exhaust emissions after a cold start)

1. Applicability

This Annex effectively replaces former Annex 4.

2. Introduction

This annex describes the procedure for the Type I test defined in paragraph 5.3.1. of this Regulation. When the reference fuel to be used is LPG or NG/biomethane, the provisions of Annex 12 shall apply additionally.

3. Test conditions

3.1. Ambient conditions

3.1.1. During the test, the test cell temperature shall be between 293 K and 303 K (20 °C and 30 °C). The absolute humidity (H) of either the air in the test cell or the intake air of the engine shall be such that:

5.5 < H ≤ 12.2 (g H2O/kg dry air)

The absolute humidity (H) shall be measured.

The following temperatures shall be measured:

Test cell ambient air

Dilution and sampling system temperatures as required for emissions measurement systems defined in Appendices 2 to 5 of this annex.

The atmospheric pressure shall be measured.

3.2. Test vehicle

3.2.1. The vehicle shall be presented in good mechanical condition. It shall have been run-in and driven at least 3,000 km before the test.

3.2.2. The exhaust device shall not exhibit any leak likely to reduce the quantity of gas collected, which quantity shall be that emerging from the engine.

3.2.3. The tightness of the intake system may be checked to ensure that carburation is not affected by an accidental intake of air.

3.2.4. The settings of the engine and of the vehicle's controls shall be those prescribed by the manufacturer. This requirement also applies, in particular, to the settings for idling (rotation speed and carbon monoxide content of the exhaust gases), for the cold start device and for the exhaust gas cleaning system.

3.2.5. The vehicle to be tested, or an equivalent vehicle, shall be fitted, if necessary, with a device to permit the measurement of the characteristic parameters necessary for chassis dynamometer setting, in conformity with paragraph 5. of this annex.

3.2.6. The technical service responsible for the tests may verify that the vehicle's performance conforms to that stated by the manufacturer, that it can be used for normal driving and, more particularly, that it is capable of starting when cold and when hot.

3.3. Test fuel

3.3.1. The appropriate reference fuel as defined in Annex 10 to this Regulation shall be used for testing.

3.3.2. Vehicles that are fuelled either with petrol or with LPG or NG/biomethane shall be tested according to Annex 12 with the appropriate reference fuel(s) as defined in Annex 10a.

3.4. Vehicle installation

3.4.1. The vehicle shall be approximately horizontal during the test so as to avoid any abnormal distribution of the fuel.

3.4.2. A current of air of variable speed shall be blown over the vehicle. The blower speed shall be, within the operating range of 10 km/h to at least 50 km/h, or as an alternative, at the request of the manufacturer within the operating range of 10 km/h to at least the maximum speed of the test cycle being used. The linear velocity of the air at the blower outlet shall be within ±5 km/h of the corresponding roller speed within the range of 10 km/h to 50 km/h. At the range over 50 km/h, the linear velocity of the air shall be within ±10 km/h of the corresponding roller speed. At roller speeds of less than 10 km/h, air velocity may be zero.

The above mentioned air velocity shall be determined as an averaged value of a number of measuring points which:

(a) For blowers with rectangular outlets are located at the centre of each rectangle dividing the whole of the blower outlet into 9 areas (dividing both horizontal and vertical sides of the blower outlet into 3 equal parts);

(b) For circular blower outlets, the outlet shall be divided into 8 equal arcs by vertical, horizontal and 45° lines. The measurement points lie on the radial centre line of each arc (22.5°) at a radius of two thirds of the total (as shown in the diagram below).

Each value at those points shall be within 10 per cent of the averaged value of themselves.

The device used to measure the linear velocity of the air shall be located at between 0 and 20 cm from the air outlet.

The final selection of the blower shall have the following characteristics:

(i) Area: at least 0.2 m2;

(ii) Height of the lower edge above ground: approximately 0.2 m;

(iii) Distance from the front of the vehicle: approximately 0.3 m.

As an alternative, at the request of the manufacturer the blower speed shall be fixed at an air speed of at least 6 m/s (21.6 km/h).

The height and lateral position of the cooling fan can also be modified at the request of the manufacturer.

4. Test equipment

4.1. Chassis dynamometer

The chassis dynamometer requirements are given in Appendix 1.

4.2. Exhaust dilution system

The exhaust dilution system requirements are given in Appendix 2.

4.3. Gaseous emissions sampling and analysis

The gaseous emissions sampling and analysis equipment requirements are given in Appendix 3.

4.4. Particulate Mass (PM) emissions equipment

The particulate mass sampling and measurement requirements are given in Appendix 4.

4.5. Particle Number (PN) emissions equipment

The particle number sampling and measurement requirements are given in Appendix 5.

4.6. General test cell equipment

The following temperatures shall be measured with an accuracy of 1.5 K:

(a) Test cell ambient air;

(b) Intake air to the engine;

(c) Dilution and sampling system temperatures as required for emissions measurement systems defined in Appendices 2 to 5 of this annex.

The atmospheric pressure shall be measurable to within 0.1 kPa.

The absolute humidity (H) shall be measurable to within 5 per cent.

5. Determination of vehicle road load

5.1. Test procedure

The procedure for measuring the vehicle road load is described in Appendix 7.

This procedure is not required if the chassis dynamometer load is to be set according to the reference mass of the vehicle.

6. Emissions test procedure

6.1. Test cycle

The operating cycle, made up of a Part One (urban cycle) and Part Two (extra-urban cycle), is illustrated in Figure 1. During the complete test the elementary urban cycle is run four times followed, by Part Two.

6.1.1. Elementary urban cycle

Part One of the test cycle comprises 4 times the elementary urban cycle which is defined in Table 1, illustrated in Figure 2, and summarized below.

Breakdown by phases:

	Time (s)	per cent
Idling	60	30.8	35.4
Deceleration, clutch disengaged	9	4.6
Gear-changing	8	4.1
Accelerations	36	18.5
Steady-speed periods	57	29.2
Decelerations	25	12.8
Total	195	100

Breakdown by use of gears:

	Time (s)	per cent
Idling	60	30.8	35.4
Deceleration, clutch disengaged	9	4.6
Gear-changing	8	4.1
First gear	24	12.3
Second gear	53	27.2
Third gear	41	21
Total	195	100

General information:

Average speed during test: 19 km/h

Effective running time: 195 s

Theoretical distance covered per cycle: 1,013 km

Equivalent distance for the four cycles: 4,052 km

6.1.2. Extra-urban cycle

Part Two of the test cycle is the extra-urban cycle which is defined in Table 2, illustrated in Figure 3, and summarized below.

Breakdown by phases:

	Time (s)	per cent
Idling	20	5.0
Deceleration, clutch disengaged	20	5.0
Gear-shift	6	1.5
Accelerations	103	25.8
Steady-speed periods	209	52.2
Decelerations	42	10.5
Total	400	100

Breakdown by use of gears:

	Time (s)	per cent
Idling	20	5.0
Deceleration, clutch disengaged	20	5.0
Gear-shift	6	1.5
First gear	5	1.3
Second gear	9	2.2
Third gear	8	2
Fourth gear	99	24.8
Fifth gear	233	58.2
Total	400	100

General information:

Average speed during test: 62.6 km/h

Effective running time: 400 s

Theoretical distance covered per cycle: 6.955 km

Maximum speed: 120 km/h

Maximum acceleration: 0.833 m/s2

Maximum deceleration: -1.389 m/s2

6.1.3. Use of the gearbox

6.1.3.1. If the maximum speed which can be attained in first gear is below 15 km/h, the second, third and fourth gears shall be used for the urban cycle (Part One) and the second, third, fourth and fifth gears for the extra-urban cycle (Part Two). The second, third and fourth gears may also be used for the urban cycle (Part One) and the second, third, fourth and fifth gears for the extra-urban cycle (Part Two) when the manufacturer's instructions recommend starting in second gear on level ground, or when first gear is therein defined as a gear reserved for cross-country driving, crawling or towing.

Vehicles which do not attain the acceleration and maximum speed values required in the operating cycle shall be operated with the accelerator control fully depressed until they once again reach the required operating curve. Deviations from the operating cycle shall be recorded in the test report.

Vehicles equipped with semi-automatic-shift gearboxes shall be tested by using the gears normally employed for driving, and the gear shift is used in accordance with the manufacturer's instructions.

6.1.3.2. Vehicles equipped with automatic-shift gearboxes shall be tested with the highest gear ("Drive") engaged. The accelerator shall be used in such a way as to obtain the steadiest acceleration possible, enabling the various gears to be engaged in the normal order. Furthermore, the gear-change points shown in Tables 1 and 2 of this annex shall not apply; acceleration shall continue throughout the period represented by the straight line connecting the end of each period of idling with the beginning of the next following period of steady speed. The tolerances given in paragraphs 6.1.3.4. and 6.1.3.5. below shall apply.

6.1.3.3. Vehicles equipped with an overdrive that the driver can actuate shall be tested with the overdrive out of action for the urban cycle (Part One) and with the overdrive in action for the extra-urban cycle (Part Two).

6.1.3.4. A tolerance of 2 km/h shall be allowed between the indicated speed and the theoretical speed during acceleration, during steady speed, and during deceleration when the vehicle's brakes are used. If the vehicle decelerates more rapidly without the use of the brakes, only the provisions of paragraph 6.4.4.3. below shall apply. Speed tolerances greater than those prescribed shall be accepted during phase changes provided that the tolerances are never exceeded for more than 0.5 s on any one occasion.

6.1.3.5. The time tolerances shall be ±1.0 s. The above tolerances shall apply equally at the beginning and at the end of each gear-changing period for the urban cycle (Part One) and for the operations Nos. 3, 5 and 7 of the extra-urban cycle (Part Two). It should be noted that the time of two seconds allowed includes the time for changing gear and, if necessary, a certain amount of latitude to catch up with the cycle.

6.2. Test preparation

6.2.1. Load and inertia setting

6.2.1.1. Load determined with vehicle road test

The dynamometer shall be adjusted so that the total inertia of the rotating masses will simulate the inertia and other road load forces acting on the vehicle when driving on the road. The means by which this load is determined is described in paragraph 5. of this annex.

Dynamometer with fixed load curve: the load simulator shall be adjusted to absorb the power exerted on the driving wheels at a steady speed of 80 km/h and the absorbed power at 50 km/h shall be noted.

Dynamometer with adjustable load curve: the load simulator shall be adjusted in order to absorb the power exerted on the driving wheels at steady speeds of 120, 100, 80, 60 and 40 and 20 km/h.

6.2.1.2. Load determined by vehicle reference mass

With the manufacturer's agreement the following method may be used.

The brake is adjusted so as to absorb the load exerted at the driving wheels at a constant speed of 80 km/h, in accordance with Table 3.

If the corresponding equivalent inertia is not available on the dynamometer, the larger value closest to the vehicle reference mass will be used.

In the case of vehicles other than passenger cars, with a reference mass of more than 1,700 kg or vehicles with permanent all-wheel drive, the power values given in Table 3 are multiplied by a factor 1.3.

6.2.1.3. The method used and the values obtained (equivalent inertia - characteristic adjustment parameter) shall be recorded in the test report.

6.2.2. Preliminary testing cycles

Preliminary testing cycles should be carried out if necessary to determine how best to actuate the accelerator and brake controls so as to achieve a cycle approximating to the theoretical cycle within the prescribed limits under which the cycle is carried out.

6.2.3. Tyre pressures

The tyre pressures shall be the same as that specified by the manufacturer and used for the preliminary road test for brake adjustment. The tyre pressure may be increased by up to 50 per cent from the manufacturer's recommended setting in the case of a two-roller dynamometer. The actual pressure used shall be recorded in the test report.

6.2.4. Background particulate mass measurement

The particulate background level of the dilution air may be determined by passing filtered dilution air through the particulate filter. This shall be drawn from the same point as the particulate sample. One measurement may be performed prior to or after the test. Particulate mass measurements may be corrected by subtracting the background contribution from the dilution system. The permissible background contribution shall be ≤ 1mg/km (or equivalent mass on the filter). If the background exceeds this level, the default figure of 1 mg/km (or equivalent mass on the filter) shall be employed. Where subtraction of the background contribution gives a negative result, the particulate mass result shall be considered to be zero.

6.2.5. Background particle number measurements

The subtraction of background particle numbers may be determined by sampling dilution air drawn from a point downstream of the particle and hydrocarbon filters into the particle number measurement system. Background correction of particle number measurements shall not be allowed for type approval, but may be used at the manufacturer's request for conformity of production and in service conformity where there are indications that tunnel contribution is significant.

6.2.6. Particulate mass filter selection

A single particulate filter without back-up shall be employed for both urban and extra-urban phases of the cycle combined.

Twin particulate filters, one for the urban, one for the extra-urban phase, may be used without back-up filters, only where the pressure-drop increase across the sample filter between the beginning and the end of the emissions test is otherwise expected to exceed 25 kPa.

6.2.7. Particulate mass filter preparation

6.2.7.1. Particulate mass sampling filters shall be conditioned (as regards temperature and humidity) in an open dish that has been protected against dust ingress for at least 2 and for not more than 80 hours before the test in an air-conditioned chamber. After this conditioning, the uncontaminated filters will be weighed and stored until they are used. If the filters are not used within one hour of their removal from the weighing chamber they shall be re-weighed.

6.2.7.2. The one hour limit may be replaced by an eight-hour limit if one or both of the following conditions are met:

6.2.7.2.1. A stabilized filter is placed and kept in a sealed filter holder assembly with the ends plugged; or

6.2.7.2.2. A stabilized filter is placed in a sealed filter holder assembly which is then immediately placed in a sample line through which there is no flow.

6.2.7.3. The particulate sampling system shall be started and prepared for sampling.

6.2.8. Particle number measurement preparation

6.2.8.1. The particle specific dilution system and measurement equipment shall be started and readied for sampling.

6.2.8.2. Prior to the test(s) the correct function of the particle counter and volatile particle remover elements of the particle sampling system shall be confirmed according to Appendix 5, paragraphs 2.3.1. and 2.3.3.:

The particle counter response shall be tested at near zero prior to each test and, on a daily basis, at high particle concentrations using ambient air.

When the inlet is equipped with a HEPA filter, it shall be demonstrated that the entire particle sampling system is free from any leaks.

6.2.9. Checking the gas analysers

The emissions analysers for the gases shall be set at zero and spanned. The sample bags shall be evacuated.

6.3. Conditioning procedure

6.3.1. For the purpose of measuring particulates, at most 36 hours and at least 6 hours before testing, the Part Two cycle described in paragraph 6.1. of this annex shall be used for vehicle pre-conditioning. Three consecutive cycles shall be driven. The dynamometer setting shall be indicated as in paragraph 6.2.1. above.

At the request of the manufacturer, vehicles fitted with indirect injection positive-ignition engines may be preconditioned with one Part One and two Part Two driving cycles.

In a test facility in which there may be possible contamination of a low particulate emitting vehicle test with residue from a previous test on a high particulate emitting vehicle, it is recommended, for the purpose of sampling equipment pre-conditioning, that a 120 km/h steady state drive cycle of 20 minutes duration followed by three consecutive Part Two cycles be driven by a low particulate emitting vehicle.

After this preconditioning, and before testing, vehicles shall be kept in a room in which the temperature remains relatively constant between 293 and 303 K (20 °C and 30 °C). This conditioning shall be carried out for at least six hours and continue until the engine oil temperature and coolant, if any, are within ±2 K of the temperature of the room.

If the manufacturer so requests, the test shall be carried out not later than 30 hours after the vehicle has been run at its normal temperature.

6.3.3. For positive-ignition engined vehicles fuelled with LPG or NG/biomethane or so equipped that they can be fuelled with either petrol or LPG or NG/biomethane, between the tests on the first gaseous reference fuel and the second gaseous reference fuel, the vehicle shall be preconditioned before the test on the second reference fuel. This preconditioning is done on the second reference fuel by driving a preconditioning cycle consisting of one Part One (urban part) and two times Part Two (extra-urban part) of the test cycle described in Appendix 1 to this annex. On the manufacturer's request and with the agreement of the technical service this preconditioning may be extended. The dynamometer setting shall be the one indicated in paragraph 6.2. of this annex.

6.4. Test procedure

6.4.1. Starting-up the engine

6.4.1.1. The engine shall be started up by means of the devices provided for this purpose according to the manufacturer's instructions, as incorporated in the drivers' handbook of production vehicles.

6.4.1.2. The first cycle starts on the initiation of the engine start-up procedure.

6.4.1.3. In cases where LPG or NG/biomethane is used as a fuel it is permissible that the engine is started on petrol and switched to LPG or NG/biomethane after a predetermined period of time which cannot be changed by the driver.

6.4.2. Idling

6.4.2.1. Manual-shift or semi-automatic gearbox, see Tables 1 and 2.

6.4.2.2. Automatic-shift gearbox

After initial engagement the selector shall not be operated at any time during the test except in the case specified in paragraph 6.4.3.3. below or if the selector can actuate the overdrive, if any.

6.4.3. Accelerations

6.4.3.1. Accelerations shall be so performed that the rate of acceleration is as constant as possible throughout the operation.

6.4.3.2. If an acceleration cannot be carried out in the prescribed time, the extra time required shall be deducted from the time allowed for changing gear, if possible, but otherwise from the subsequent steady-speed period.

6.4.3.3. Automatic-shift gearboxes

If acceleration cannot be carried out in the prescribed time, the gear selector shall operate in accordance with requirements for manual-shift gearboxes.

6.4.4. Decelerations

6.4.4.1. All decelerations of the elementary urban cycle (Part One) shall be effected by removing the foot completely from the accelerator with the clutch remaining engaged. The clutch shall be disengaged, without use of the gear lever, at the higher of the following speeds: 10 km/h or the speed corresponding to the engine idle speed.

All decelerations of the extra-urban cycle (Part Two) shall be effected by removing the foot completely from the accelerator, the clutch remaining engaged. The clutch shall be disengaged, without use of the gear lever, at a speed of 50 km/h for the last deceleration.

6.4.4.2. If the period of deceleration is longer than that prescribed for the corresponding phase, the vehicle's brakes shall be used to enable compliance with the timing of the cycle.

6.4.4.3. If the period of deceleration is shorter than that prescribed for the corresponding phase, the timing of the theoretical cycle shall be restored by constant speed or an idling period merging into the following operation.

6.4.4.4. At the end of the deceleration period (halt of the vehicle on the rollers) of the elementary urban cycle (Part One), the gears shall be placed in neutral and the clutch engaged.

6.4.5. Steady speeds

6.4.5.1. "Pumping" or the closing of the throttle shall be avoided when passing from acceleration to the following steady speed.

6.4.5.2. Periods of constant speed shall be achieved by keeping the accelerator position fixed.

6.4.6. Sampling

Sampling shall begin (BS) before or at the initiation of the engine start up procedure and end on conclusion of the final idling period in the extra-urban cycle (Part Two, end of sampling (ES)) or, in the case of test Type VI, on conclusion of the final idling period of the last elementary urban cycle (Part One).

6.4.7. During the test the speed is recorded against time or collected by the data-acquisition system so that the correctness of the cycles performed can be assessed.

6.4.8. Particles shall be measured continuously in the particle sampling system. The average concentrations shall be determined by integrating the analyser signals over the test cycle.

6.5. Post-test procedures

6.5.1. Gas analyser check

Zero and span gas reading of the analysers used for continuous measurement shall be checked. The test shall be considered acceptable if the difference between the pre-test and post-test results is less than 2 per cent of the span gas value.

6.5.2. Particulate filter weighing

Reference filters shall be weighed within 8 hours of the test filter weighing. The contaminated particulate test filter shall be taken to the weighing chamber within one hour following the analyses of the exhaust gases. The test filter shall be conditioned for at least 2 hours and not more than 80 hours and then weighed.

6.5.3. Bag analysis

6.5.3.1. The exhaust gases contained in the bag shall be analysed as soon as possible and in any event not later than 20 minutes after the end of the test cycle.

6.5.3.2. Prior to each sample analysis, the analyser range to be used for each pollutant shall be set to zero with the appropriate zero gas.

6.5.3.3. The analysers shall then be set to the calibration curves by means of span gases of nominal concentrations of 70 to 100 per cent of the range.

6.5.3.4. The analysers' zero settings shall then be rechecked: if any reading differs by more than 2 per cent of the range from that set in paragraph 6.5.3.2. above, the procedure shall be repeated for that analyser.

6.5.3.5. The samples shall then be analysed.

6.5.3.6. After the analysis, zero and span points shall be rechecked using the same gases. If these rechecks are within 2 per cent of those in paragraph 6.5.3.3. above, the analysis shall be considered acceptable.

6.5.3.7. At all points in this paragraph, the flow-rates and pressures of the various gases shall be the same as those used during calibration of the analysers.

6.5.3.8. The figure adopted for the content of the gases in each of the pollutants measured shall be that read off after stabilisation of the measuring device. Hydrocarbon mass emissions of compression-ignition engines shall be calculated from the integrated HFID reading, corrected for varying flow if necessary, as shown in paragraph 6.6.6. below.

6.6. Calculation of emissions

6.6.1. Determination of volume

6.6.1.1. Calculation of the volume when a variable dilution device with constant flow control by orifice or venturi is used.

Record continuously the parameters showing the volumetric flow, and calculate the total volume for the duration of the test.

6.6.1.2. Calculation of volume when a positive displacement pump is used

The volume of diluted exhaust gas measured in systems comprising a positive displacement pump is calculated with the following formula:

V = Vo · N

Where:
V	=	volume of the diluted gas expressed in litres per test (prior to correction),
Vo	=	volume of gas delivered by the positive displacement pump in testing conditions in litres per revolution,
N	=	number of revolutions per test.

6.6.1.3. Correction of Volume to Standard Conditions

The diluted exhaust-gas volume is corrected by means of the following formula:

(1)

Where:

(2)

PB = barometric pressure in the test room in kPa,

P1 = vacuum at the inlet to the positive displacement pump in kPa relative to the ambient barometric pressure,

Tp = average temperature of the diluted exhaust gas entering the positive displacement pump during the test (K).

6.6.2. Total mass of gaseous and particulate pollutants emitted

The mass M of each pollutant emitted by the vehicle during the test shall be determined by obtaining the product of the volumetric concentration and the volume of the gas in question, with due regard for the following densities under above-mentioned reference conditions:

In the case of carbon monoxide (CO): d = 1.25 g/l

In the case of hydrocarbons:

For petrol (E5) (C1H1.89O0.016) d = 0.631 g/1

For diesel (B5) (C1Hl.86O0.005) d = 0.622 g/1

For LPG (CH2.525) d = 0.649 g/l

For NG/biomethane (C1H4) d = 0.714 g/l

For ethanol (E85) (C1H2,74O0.385) d = 0.932 g/l

In the case of nitrogen oxides (NOx): d = 2.05 g/1

6.6.3. Mass emissions of gaseous pollutants shall be calculated by means of the following formula:

Where:
Mi	=	mass emission of the pollutant i in grams per kilometre,
Vmix	=	volume of the diluted exhaust gas expressed in litres per test and corrected to standard conditions (273.2 K and 101.33 kPa),
Qi	=	density of the pollutant i in grams per litre at normal temperature and pressure (273.2 K and 101.33 kPa),
kh	=	humidity correction factor used for the calculation of the mass emissions of oxides of nitrogen. There is no humidity correction for HC and CO,
Ci	=	concentration of the pollutant i in the diluted exhaust gas expressed in ppm and corrected by the amount of the pollutant i contained in the dilution air,
d	=	distance corresponding to the operating cycle in kilometres.

6.6.4. Correction for dilution air concentration

The concentration of pollutant in the diluted exhaust gas shall be corrected by the amount of the pollutant in the dilution air as follows:

(4)

Where:
Ci	=	concentration of the pollutant i in the diluted exhaust gas, expressed in ppm and corrected by the amount of i contained in the dilution air,
Ce	=	measured concentration of pollutant i in the diluted exhaust gas, expressed in ppm,
Cd	=	concentration of pollutant i in the air used for dilution, expressed in ppm,
DF	=	dilution factor.

The dilution factor is calculated as follows:

for petrol (E5) (5a)

and diesel (B5) (5a)

for LPG (5b)

for NG/biomethane (5c)

for Ethanol (E85) (5d)

In these equations:

CCO2	=	concentration of CO2 in the diluted exhaust gas contained in the sampling bag, expressed in per cent volume,
CHC	=	concentration of HC in the diluted exhaust gas contained in the sampling bag, expressed in ppm carbon equivalent,
CCO	=	concentration of CO in the diluted exhaust gas contained in the sampling bag, expressed in ppm.

Non-methane hydrocarbon concentration is calculated as follows:

CNMHC = CTHC - (Rf CH4 • CCH4)

where:

CNMHC = corrected concentration of NMHC in the diluted exhaust gas, expressed in ppm carbon equivalent,

CTHC = concentration of THC in the diluted exhaust gas, expressed in ppm carbon equivalent and corrected by the amount of THC contained in the dilution air,

CCH4 = concentration of CH4 in the diluted exhaust gas, expressed in ppm carbon equivalent and corrected by the amount of CH4 contained in the dilution air,

Rf CH4 = is the FID response factor to methane as defined in paragraph 2.3.3. of Appendix 3 of Annex 4a.

6.6.5. Calculation of the NO humidity correction factor

In order to correct the influence of humidity on the results of oxides of nitrogen, the following calculations are applied:

(6)

in which:

Where:
H	=	absolute humidity expressed in grams of water per kilogram of dry air,
Ra	=	relative humidity of the ambient air expressed as a percentage,
Pd	=	saturation vapour pressure at ambient temperature expressed in kPa,
PB	=	atmospheric pressure in the room, expressed in kPa.

6.6.6. Determination of HC for compression-ignition engines

To calculate HC-mass emission for compression-ignition engines, the average HC concentration is calculated as follows:

(7)

where:

= integral of the recording of the heated FID over the test (t2-t1)

Ce = concentration of HC measured in the diluted exhaust in ppm of Ci is substituted for CHC in all relevant equations.

6.6.7. Determination of particulates

Particulate emission Mp (g/km) is calculated by means of the following equation:

Where exhaust gases are vented outside tunnel;

Where exhaust gases are returned to the tunnel;
Where:
Vmix	=	volume of diluted exhaust gases (see paragraph 6.6.1.), under standard conditions,
Vep	=	volume of exhaust gas flowing through particulate filter under standard conditions,
Pe	=	particulate mass collected by filter(s),
d	=	distance corresponding to the operating cycle in km,
Mp	=	particulate emission in g/km.

Where correction for the particulate background level from the dilution system has been used, this shall be determined in accordance with paragraph 6.2.4. In this case, the particulate mass (g/km) shall be calculated as follows:

Where exhaust gases are vented outside tunnel;

Where exhaust gases are returned to the tunnel.

Where:
Vap	=	volume of tunnel air flowing through the background particulate filter under standard conditions,
Pa	=	particulate mass collected by background filter,
DF	=	dilution factor as determined in paragraph 6.6.4.

Where application of a background correction results in a negative particulate mass (in g/km) the result shall be considered to be zero g/km particulate mass.

6.6.8. Determination of particle numbers

Number emission of particles shall be calculated by means of the following equation:

Where:
N	=	particle number emission expressed in particles per kilometre,
V	=	volume of the diluted exhaust gas expressed in litres per test and corrected to standard conditions (273.2 K and 101.33 kPa),
K	=	calibration factor to correct the particle number counter measurements to the level of the reference instrument where this is not applied internally within the particle number counter. Where the calibration factor is applied internally within the particle number counter a value of 1 shall be used for k in the above equation,
	=	corrected concentration of particles from the diluted exhaust gas expressed as the average particles per cubic centimetre figure from the emissions test including the full duration of the drive cycle. If the volumetric mean concentration results () from the particle number counter are not output at standard conditions (273.2 K and 101.33 kPa), then the concentrations should be corrected to those conditions (),
	=	mean particle concentration reduction factor of the volatile particle remover at the dilution setting used for the test,
d	=	distance corresponding to the operating cycle expressed in kilometres,
	=	shall be calculated from the following equation:

Where:
Ci	=	a discrete measurement of particle concentration in the diluted gas exhaust from the particle counter expressed in particles per cubic centimetre and corrected for coincidence,
n	=	total number of discrete particle concentration measurements made during the operating cycle,
n		shall be calculated from the following equation:


Where:
T	=	time duration of the operating cycle expressed in seconds,
f	=	data logging frequency of the particle counter expressed in Hz.

6.6.9. Allowance for mass emissions from vehicles equipped with periodically regenerating devices

When the vehicle is equipped with a periodically regenerating system as defined in Regulation No. 83, 06 series of amendments, Annex 13: Emissions test procedure for a vehicle equipped with a periodically regenerating system:

6.6.9.1. The provisions of Annex 13 shall apply for the purposes of particulate mass measurements only and not particle number measurements.

6.6.9.2. For particulate mass sampling during a test in which the vehicle undergoes a scheduled regeneration, the filter face temperature shall not exceed 192 °C.

6.6.9.3. For particulate mass sampling during a test when the regenerating device is in a stabilized loading condition (i.e. the vehicle is not undergoing a regeneration), it is recommended that the vehicle has completed > 1/3 of the mileage between scheduled regenerations or that the periodically regenerating device has undergone equivalent loading off the vehicle.

For the purposes of Conformity of Production testing, the manufacturer may ensure that this is included within the evolution coefficient. In this case, paragraph 8.2.3.2.2. of this Regulation is replaced by paragraph 6.6.9.3.1. of this annex.

6.6.9.3.1. If the manufacturer wishes to run in the vehicles, ("x" km, where x  3,000 km for vehicles equipped with a positive ignition engine and x  15,000 km for vehicles equipped with a compression ignition engine and where the vehicle is at > 1/3 distance between successive regenerations), the procedure will be as follows:

(a) The pollutant emissions (type I) will be measured at zero and at "x" km on the first tested vehicle;

(b) The evolution coefficient of the emissions between zero and "x" km will be calculated for each of the pollutants:

This may be less than 1,

(a) The other vehicles will not be run in, but their zero km emissions will be multiplied by the evolution coefficient.

In this case, the values to be taken will be:

(a) The values at "x" km for the first vehicle;

(b) The values at zero km multiplied by the evolution coefficient for the other vehicles.

Table 1

Elementary urban operating cycle on the chassis dynamometer (Part One)

	Operation	Phase	Acceleration (m/s2)	Speed (km/h)	Duration of each		Cumulative time (s)	Gear to be used in the case of a manual gearbox
	Operation	Phase	Acceleration (m/s2)	Speed (km/h)	Operation (s)	Phase (s)	Cumulative time (s)	Gear to be used in the case of a manual gearbox
1	Idling	1	0	0	11	11	11	6 s PM + 5 s K1 (*)
2	Acceleration	2	1.04	0-15	4	4	15	1
3	Steady speed	3	0	15	9	8	23	1
4	Deceleration	4	‑0.69	15-10	2	5	25	1
5	Deceleration, clutch disengaged		‑0.92	10-0	3		28	K1 (*)
6	Idling	5	0	0	21	21	49	16 s PM + 5 s K1 (*)
7	Acceleration	6	0.83	0-15	5	12	54	1
8	Gear change			15	2		56
9	Acceleration		0.94	15-32	5		61	2
10	Steady speed	7	0	32	24	24	85	2
11	Deceleration	8	‑0.75	32-10	8	11	93	2
12	Deceleration, clutch disengaged		‑0.92	10-0	3		96	K 2 (*)
13	Idling	9	0	0	21		117	16 s PM + 5 s K1 (*)
14	Acceleration	10	0.83	0-15	5	26	122	1
15	Gear change			15	2		124
16	Acceleration		0.62	15-35	9		133	2
17	Gear change			35	2		135
18	Acceleration		0.52	35-50	8		143	3
19	Steady speed	11	0	50	12	12	155	3
20	Deceleration	12	‑0.52	50-35	8	8	163	3
21	Steady speed	13	0	35	13	13	176	3
22	Gear change	14		35	2	12	178
23	Deceleration		-0.99	35-10	7		185	2
24	Deceleration clutch disengaged		‑0.92	10-0	3		188	K2 (*)
25	Idling	15	0	0	7	7	195	7 s PM (*)
(*) PM = gearbox in neutral, clutch engaged. K1, K2 = first or second gear engaged, clutch disengaged.

Table 2
Extra-urban cycle (Part Two) for the Type I test

No. of operation	Operation	Phase	Acceleration (m/s2)	Speed (km/h)	Duration of each		Cumulative time(s)	Gear to be used in the case of a manual gearbox
No. of operation	Operation	Phase	Acceleration (m/s2)	Speed (km/h)	Operation(s)	Phase(s)	Cumulative time(s)	Gear to be used in the case of a manual gearbox
1	Idling	1	0	0	20	20	20	K1 1
2	Acceleration	2	0.83	0-15	5	41	25	1
3	Gear change			15	2		27	-
4	Acceleration		0.62	15-35	9		36	2
5	Gear change			35	2		38	-
6	Acceleration		0.52	35-50	8		46	3
7	Gear change			50	2		48	-
8	Acceleration		0.43	50-70	13		61	4
9	Steady speed	3	0	70	50	50	111	5
10	Deceleration	4	‑0.69	70-50	8	8	119	4 s.5 + 4 s.4
11	Steady speed	5	0	50	69	69	188	4
12	Acceleration	6	0.43	50-70	13	13	201	4
13	Steady speed	7	0	70	50	50	251	5
14	Acceleration	8	0.24	70-100	35	35	286	5
15	Steady speed2	9	0	100	30	30	316	5 2
16	Acceleration2	10	0.28	100-120	20	20	336	5 2
17	Steady speed2	11	0	120	10	20	346	5 2
18	Deceleration 2	12	‑0.69	120-80	16	34	362	5 2
19	Deceleration2		‑1.04	80-50	8		370	5 2
20	Deceleration, clutch disengaged		1.39	50-0	10		380	K5 1
21	Idle	13	0	0	20	20	400	PM 1

1 PM = gearbox in neutral, clutch engaged. K1, K5 = first or second gear engaged, clutch disengaged

2 Additional gears can be used according to manufacturer recommendations if the vehicle is equipped with a transmission with

more than five gears.

Annex 4a - Appendix 2

Exhaust dilution system

1. System specification

1.1. System Overview

A full-flow exhaust dilution system shall be used. This requires that the vehicle exhaust be continuously diluted with ambient air under controlled conditions. The total volume of the mixture of exhaust and dilution air shall be measured and a continuously proportional sample of the volume shall be collected for analysis. The quantities of pollutants are determined from the sample concentrations, corrected for the pollutant content of the ambient air and the totalised flow over the test period.

The exhaust dilution system shall consist of a transfer tube, a mixing chamber and dilution tunnel, a dilution air conditioning, a suction device and a flow measurement device. Sampling probes shall be fitted in the dilution tunnel as specified in Appendices 3, 4 and 5.

The mixing chamber described above will be a vessel, such as those illustrated in Figures 6 and 7, in which vehicle exhaust gases and the dilution air are combined so as to produce a homogeneous mixture at the chamber outlet.

1.2. General Requirements

1.2.1. The vehicle exhaust gases shall be diluted with a sufficient amount of ambient air to prevent any water condensation in the sampling and measuring system at all conditions which may occur during a test.

1.2.2. The mixture of air and exhaust gases shall be homogeneous at the point where the sampling probe is located (see paragraph 1.3.3. below). The sampling probe shall extract a representative sample of the diluted exhaust gas.

1.2.3. The system shall enable the total volume of the diluted exhaust gases to be measured.

1.2.4. The sampling system shall be gas-tight. The design of the variable-dilution sampling system and the materials that go to make it up shall be such that they do not affect the pollutant concentration in the diluted exhaust gases. Should any component in the system (heat exchanger, cyclone separator, blower, etc.) change the concentration of any of the pollutants in the diluted exhaust gases and the fault cannot be corrected, then sampling for that pollutant shall be carried out upstream from that component.

1.2.5. All parts of the dilution system that are in contact with raw and diluted exhaust gas, shall be designed to minimise deposition or alteration of the particulates or particles. All parts shall be made of electrically conductive materials that do not react with exhaust gas components, and shall be electrically grounded to prevent electrostatic effects.

1.2.6. If the vehicle being tested is equipped with an exhaust pipe comprising several branches, the connecting tubes shall be connected as near as possible to the vehicle without adversely affecting its operation.

1.2.7. The variable-dilution system shall be so designed as to enable the exhaust gases to be sampled without appreciably changing the back-pressure at the exhaust pipe outlet.

1.2.8. The connecting tube between the vehicle and dilution system shall be designed so as to minimize heat loss.

1.3. Specific Requirements

1.3.1. Connection to Vehicle Exhaust

The connecting tube between the vehicle exhaust outlets and the dilution system shall be as short as possible; and satisfy the following requirements:

(a) Be less than 3.6 m long, or less than 6.1 m long if heat insulated. Its internal diameter may not exceed 105 mm;

(b) Shall not cause the static pressure at the exhaust outlets on the vehicle being tested to; differ by more than 0.75 kPa at 50 km/h, or more than 1.25 kPa for the whole duration of the test from the static pressures recorded when nothing is connected to the vehicle exhaust outlets. The pressure shall be measured in the exhaust outlet or in an extension having the same diameter, as near as possible to the end of the pipe. Sampling systems capable of maintaining the static pressure to within 0.25 kPa may be used if a written request from a manufacturer to the Technical Service substantiates the need for the closer tolerance;

(d) Any elastomer connectors employed shall be as thermally stable as possible and have minimum exposure to the exhaust gases.

1.3.2. Dilution Air Conditioning

The dilution air used for the primary dilution of the exhaust in the CVS tunnel shall be passed through a medium capable of reducing particles in the most penetrating particle size of the filter material by ≥ 99.95 per cent, or through a filter of at least class H13 of EN 1822:1998. This represents the specification of High Efficiency Particulate Air (HEPA) filters. The dilution air may optionally be charcoal scrubbed before being passed to the HEPA filter. It is recommended that an additional coarse particle filter is situated before the HEPA filter and after the charcoal scrubber, if used.

At the vehicle manufacturer's request, the dilution air may be sampled according to good engineering practice to determine the tunnel contribution to background particulate mass levels, which can then be subtracted from the values measured in the diluted exhaust.

1.3.3. Dilution Tunnel

Provision shall be made for the vehicle exhaust gases and the dilution air to be mixed. A mixing orifice may be used.

In order to minimise the effects on the conditions at the exhaust outlet and to limit the drop in pressure inside the dilution-air conditioning device, if any, the pressure at the mixing point shall not differ by more than ±0.25 kPa from atmospheric pressure.

The homogeneity of the mixture in any cross-section at the location of the sampling probe shall not vary by more than ±2 per cent from the average of the values obtained for at least five points located at equal intervals on the diameter of the gas stream.

For particulate and particle emissions sampling, a dilution tunnel shall be used which:

(a) Shall consist of a straight tube of electrically-conductive material, which shall be earthed;

(b) Shall be small enough in diameter to cause turbulent flow (Reynolds number  4000) and of sufficient length to cause complete mixing of the exhaust and dilution air;

(d) May be insulated.

1.3.4. Suction Device

This device may have a range of fixed speeds to ensure sufficient flow to prevent any water condensation. This result is generally obtained if the flow is either:

(a) Twice as high as the maximum flow of exhaust gas produced by accelerations of the driving cycle; or

(b) Sufficient to ensure that the CO2 concentration in the dilute- exhaust sample bag is less than 3 per cent by volume for petrol and diesel, less than 2.2 per cent by volume for LPG and less than 1.5 per cent by volume for NG/biomethane.

1.3.5. Volume Measurement in the Primary Dilution System

The method of measuring total dilute exhaust volume incorporated in the constant volume sampler shall be such that measurement is accurate to 2 per cent under all operating conditions. If the device cannot compensate for variations in the temperature of the mixture of exhaust gases and dilution air at the measuring point, a heat exchanger shall be used to maintain the temperature to within ±6 K of the specified operating temperature.

If necessary, some form of protection for the volume measuring device may be used e.g. a cyclone separator, bulk stream filter, etc.

A temperature sensor shall be installed immediately before the volume measuring device. This temperature sensor shall have an accuracy and a precision of ±1 K and a response time of 0.1 s at 62 per cent of a given temperature variation (value measured in silicone oil).

The measurement of the pressure difference from atmospheric pressure shall be taken upstream from and, if necessary, downstream from the volume measuring device.

The pressure measurements shall have a precision and an accuracy of ±0.4 kPa during the test.

1.4. Recommended System Descriptions

Figure 6 and Figure 7 are schematic drawings of two types of recommended exhaust dilution systems that meet the requirements of this annex.

Since various configurations can produce accurate results, exact conformity with these figures is not essential. Additional components such as instruments, valves, solenoids and switches may be used to provide additional information and co-ordinate the functions of the component system.

1.4.1. Full Flow Dilution System with Positive Displacement Pump

Figure 6

Positive Displacement Pump Dilution System

The positive displacement pump (PDP) full flow dilution system satisfies the requirements of this annex by metering the flow of gas through the pump at constant temperature and pressure. The total volume is measured by counting the revolutions made by the calibrated positive displacement pump. The proportional sample is achieved by sampling with pump, flow-meter and flow control valve at a constant flow rate. The collecting equipment consists of:

1.4.1.1. A filter (DAF) for the dilution air, which can be preheated if necessary. This filter shall consist of the following filters in sequence: an optional activated charcoal filter (inlet side), and a high efficiency particulate air (HEPA) filter (outlet side). It is recommended that an additional coarse particle filter is situated before the HEPA filter and after the charcoal filter, if used. The purpose of the charcoal filter is to reduce and stabilize the hydrocarbon concentrations of ambient emissions in the dilution air;

1.4.1.2. A transfer tube (TT) by which vehicle exhaust is admitted into a dilution tunnel (DT) in which the exhaust gas and dilution air are mixed homogeneously;

1.4.1.3. The positive displacement pump (PDP), producing a constant-volume flow of the air/exhaust-gas mixture. The PDP revolutions, together with associated temperature and pressure measurement are used to determine the flowrate;

1.4.1.4. A heat exchanger (HE) of a capacity sufficient to ensure that throughout the test the temperature of the air/exhaust-gas mixture measured at a point immediately upstream of the positive displacement pump is within 6 K of the average operating temperature during the test. This device shall not affect the pollutant concentrations of diluted gases taken off after for analysis.

1.4.1.5. A mixing chamber (MC) in which exhaust gas and air are mixed homogeneously, and which may be located close to the vehicle so that the length of the transfer tube (TT) is minimized.

1.4.2. Full Flow Dilution System with Critical Flow Venturi

Figure 7

Critical-Flow Venturi Dilution System

The use of a critical-flow venturi (CFV) for the full-flow dilution system is based on the principles of flow mechanics for critical flow. The variable mixture flow rate of dilution and exhaust gas is maintained at sonic velocity which is directly proportional to the square root of the gas temperature. Flow is continually monitored, computed and integrated throughout the test.

The use of an additional critical-flow sampling venturi ensures the proportionality of the gas samples taken from the dilution tunnel. As both pressure and temperature are equal at the two venturi inlets the volume of the gas flow diverted for sampling is proportional to the total volume of diluted exhaust-gas mixture produced, and thus the requirements of this annex are met. The collecting equipment consists of:

1.4.2.1. A filter (DAF) for the dilution air, which can be preheated if necessary. This filter shall consist of the following filters in sequence: an optional activated charcoal filter (inlet side), and a high efficiency particulate air (HEPA) filter (outlet side). It is recommended that an additional coarse particle filter is situated before the HEPA filter and after the charcoal filter, if used. The purpose of the charcoal filter is to reduce and stabilize the hydrocarbon concentrations of ambient emissions in the dilution air;

1.4.2.2. A mixing chamber (MC) in which exhaust gas and air are mixed homogeneously, and which may be located close to the vehicle so that the length of the transfer tube (TT) is minimized;

1.4.2.3. A dilution tunnel (DT) from which particulates and particles are sampled;

1.4.2.4. Some form of protection for the measurement system may be used e.g. a cyclone separator, bulk stream filter, etc.;

1.4.2.5. A measuring critical-flow venturi tube (CFV), to measure the flow volume of the diluted exhaust gas;

1.4.2.6. A blower (BL), of sufficient capacity to handle the total volume of diluted exhaust gas.

2. CVS Calibration procedure

2.1. General Requirements

The CVS system shall be calibrated by using an accurate flow-meter and a restricting device. The flow through the system shall be measured at various pressure readings and the control parameters of the system measured and related to the flows. The flow-metering device shall be dynamic and suitable for the high flow-rate encountered in constant volume sampler testing. The device shall be of certified accuracy traceable to an approved national or international standard.

2.1.1. Various types of flow-meter may be used, e.g. calibrated venturi, laminar flow-meter, calibrated turbine-meter, provided that they are dynamic measurement systems and can meet the requirements of paragraph 1.3.5. of this appendix.

2.1.2. The following paragraphs give details of methods of calibrating PDP and CFV units, using a laminar flow-meter, which gives the required accuracy, together with a statistical check on the calibration validity.

2.2. Calibration of the positive displacement pump (PDP)

2.2.1. The following calibration procedure outlines the equipment, the test configuration and the various parameters that are measured to establish the flow-rate of the CVS pump. All the parameters related to the pump are simultaneously measured with the parameters related to the flow-meter which is connected in series with the pump. The calculated flow-rate (given in m3/min at pump inlet, absolute pressure and temperature) can then be plotted versus a correlation function that is the value of a specific combination of pump parameters. The linear equation that relates the pump flow and the correlation function is then determined. In the event that a CVS has a multiple speed drive, a calibration for each range used shall be performed.

2.2.2. This calibration procedure is based on the measurement of the absolute values of the pump and flow-meter parameters that relate the flow rate at each point. Three conditions shall be maintained to ensure the accuracy and integrity of the calibration curve:

2.2.2.1. The pump pressures shall be measured at tappings on the pump rather than at the external piping on the pump inlet and outlet. Pressure taps that are mounted at the top centre and bottom centre of the pump drive headplate are exposed to the actual pump cavity pressures, and therefore reflect the absolute pressure differentials;

2.2.2.2. Temperature stability shall be maintained during the calibration. The laminar flow-meter is sensitive to inlet temperature oscillations which cause the data points to be scattered. Gradual changes of ±1 K in temperature are acceptable as long as they occur over a period of several minutes;

2.2.2.3. All connections between the flow-meter and the CVS pump shall be free of any leakage.

2.2.3. During an exhaust emission test, the measurement of these same pump parameters enables the user to calculate the flow rate from the calibration equation.

2.2.4. Figure 8 of this appendix shows one possible test set-up. Variations are permissible, provided that the Technical Service approves them as being of comparable accuracy. If the set-up shown in Figure 8 is used, the following data shall be found within the limits of precision given:

Barometric pressure (corrected)(Pb) 0.03 kPa

Ambient temperature (T) 0.2 K

Air temperature at LFE (ETI) 0.15 K

Pressure depression upstream of LFE (EPI) 0.01 kPa

Pressure drop across the LFE matrix (EDP) 0.0015 kPa

Air temperature at CVS pump inlet (PTI) 0.2 K

Air temperature at CVS pump outlet (PTO) 0.2 K

Pressure depression at CVS pump inlet (PPI) 0.22 kPa

Pressure head at CVS pump outlet (PPO) 0.22 kPa

Pump revolutions during test period (n) 1 min-1

Elapsed time for period (minimum 250 s) (t) 0.1 s

Figure 8

PDP Calibration Configuration

2.2.5. After the system has been connected as shown in Figure 8 of this appendix, set the variable restrictor in the wide-open position and run the CVS pump for 20 minutes before starting the calibration.

2.2.6. Reset the restrictor valve to a more restricted condition in an increment of pump inlet depression (about 1 kPa) that will yield a minimum of six data points for the total calibration. Allow the system to stabilize for three minutes and repeat the data acquisition.

2.2.7. The air flow rate (Qs) at each test point is calculated in standard m3/min from the flow-meter data using the manufacturer's prescribed method.

2.2.8. The air flow-rate is then converted to pump flow (V0) in m3/rev at absolute pump inlet temperature and pressure.

Where:
V0	=	pump flow rate at Tp and Pp (m3/rev),
Qs	=	air flow at 101.33 kPa and 273.2 K (m3/min),
Tp	=	pump inlet temperature (K),
Pp	=	absolute pump inlet pressure (kPa),
N	=	pump speed (min-1).

2.2.9. To compensate for the interaction of pump speed pressure variations at the pump and the pump slip rate, the correlation function (x0) between the pump speed (n), the pressure differential from pump inlet to pump outlet and the absolute pump outlet pressure is then calculated as follows:

Where:
x0	=	correlation function,
ΔPp	=	pressure differential from pump inlet to pump outlet (kPa),
Pe	=	absolute outlet pressure (PPO + Pb) (kPa).

A linear least-square fit is performed to generate the calibration equations which have the formula:

V0 = D0 - M (x0)

n = A - B (ΔPp)

D0, M, A and B are the slope-intercept constants describing the lines.

2.2.10. A CVS system that has multiple speeds shall be calibrated on each speed used. The calibration curves generated for the ranges shall be approximately parallel and the intercept values (D0) shall increase as the pump flow range decreases.

2.2.11. If the calibration has been performed carefully, the calculated values from the equation will be within 0.5 per cent of the measured value of V0. Values of M will vary from one pump to another. Calibration is performed at pump start-up and after major maintenance.

2.3. Calibration of the critical-flow venturi (CFV)

2.3.1. Calibration of the CFV is based upon the flow equation for a critical venturi:

Where:
Qs	=	flow,
Kv	=	calibration coefficient,
P	=	absolute pressure (kPa),
T	=	absolute temperature (K).

Gas flow is a function of inlet pressure and temperature.

The calibration procedure described below establishes the value of the calibration coefficient at measured values of pressure, temperature and air flow.

2.3.2. The manufacturer's recommended procedure shall be followed for calibrating electronic portions of the CFV.

2.3.3. Measurements for flow calibration of the critical flow venturi are required and the following data shall be found within the limits of precision given:

Barometric pressure (corrected) (Pb) 0.03 kPa,

LFE air temperature, flow-meter (ETI) 0.15 K,

Pressure depression upstream of LFE (EPI) 0.01 kPa,

Pressure drop across (EDP) LFE matrix 0.0015 kPa,

Air flow (Qs) 0.5 per cent,

CFV inlet depression (PPI) 0.02 kPa,

Temperature at venturi inlet (Tv) 0.2 K.

2.3.4. The equipment shall be set up as shown in Figure 9 of this appendix and checked for leaks. Any leaks between the flow-measuring device and the critical-flow venturi will seriously affect the accuracy of the calibration.

Figure 9

CFV Calibration Configuration

2.3.5. The variable-flow restrictor shall be set to the open position, the blower shall be started and the system stabilized. Data from all instruments shall be recorded.

2.3.6. The flow restrictor shall be varied and at least eight readings across the critical flow range of the venturi shall be made.

2.3.7. The data recorded during the calibration shall be used in the following calculations. The air flow-rate (Qs) at each test point is calculated from the flow-meter data using the manufacturer's prescribed method.

Calculate values of the calibration coefficient for each test point:

Where:
Qs	=	flow-rate in m3/min at 273.2 K and 101.33 kPa,
Tv	=	temperature at the venturi inlet (K),
Pv	=	absolute pressure at the venturi inlet (kPa).

Plot Kv as a function of venturi inlet pressure. For sonic flow, Kv will have a relatively constant value. As pressure decreases (vacuum increases) the venturi becomes unchoked and Kv decreases. The resultant Kv changes are not permissible.

For a minimum of eight points in the critical region, calculate an average Kv and the standard deviation.

If the standard deviation exceeds 0.3 per cent of the average Kv, take corrective action.

3. System verification procedure

3.1. General Requirements

The total accuracy of the CVS sampling system and analytical system shall be determined by introducing a known mass of a pollutant gas into the system whilst it is being operated as if during a normal test and then analysing and calculating the pollutant mass according to the formula in paragraph 6.6. of Annex 4a except that the density of propane shall be taken as 1.967 grams per litre at standard conditions. The following two techniques are known to give sufficient accuracy.

The maximum permissible deviation between the quantity of gas introduced and the quantity of gas measured is 5 per cent.

3.2. CFO Method

3.2.1. Metering a constant flow of pure gas (CO or C3H8) using a critical flow orifice device.

3.2.2. A known quantity of pure gas (CO or C3H8) is fed into the CVS system through the calibrated critical orifice. If the inlet pressure is high enough, the flow-rate (q), which is adjusted by means of the critical flow orifice, is independent of orifice outlet pressure (critical flow). If deviations exceeding 5 per cent occur, the cause of the malfunction shall be determined and corrected. The CVS system is operated as in an exhaust emission test for about 5 to 10 minutes. The gas collected in the sampling bag is analysed by the usual equipment and the results compared to the concentration of the gas samples which was known beforehand.

3.3. Gravimetric Method

3.3.1. Metering a limited quantity of pure gas (CO or C3H8) by means of a gravimetric technique.

3.3.2. The following gravimetric procedure may be used to verify the CVS system.

The weight of a small cylinder filled with either carbon monoxide or propane is determined with a precision of ±0.01 g. For about 5 to 10 minutes, the CVS system is operated as in a normal exhaust emission test, while CO or propane is injected into the system. The quantity of pure gas involved is determined by means of differential weighing. The gas accumulated in the bag is then analysed by means of the equipment normally used for exhaust-gas analysis. The results are then compared to the concentration figures computed previously.

Annexe 4a -Appendix 3

Gaseous emissions measurement equipment

1. Specification

1.1. System Overview

A continuously proportional sample of the diluted exhaust gases and the dilution air shall be collected for analysis.

Mass gaseous emissions shall be determined from the proportional sample concentrations and the total volume measured during the test. The sample concentrations shall be corrected to take account of the pollutant content of the ambient air.

1.2. Sampling System Requirements

1.2.1. The sample of dilute exhaust gases shall be taken upstream from the suction device but downstream from the conditioning devices (if any).

1.2.2. The flow rate shall not deviate from the average by more than 2 per cent.

1.2.3. The sampling rate shall not fall below 5 litres per minute and shall not exceed 0.2 per cent of the flow rate of the dilute exhaust gases. An equivalent limit shall apply to constant-mass sampling systems.

1.2.4. A sample of the dilution air shall be taken at a constant flow rate near the ambient air-inlet (after the filter if one is fitted).

1.2.5. The dilution air sample shall not be contaminated by exhaust gases from the mixing area.

1.2.6. The sampling rate for the dilution air shall be comparable to that used in the case of the dilute exhaust gases.

1.2.7. The materials used for the sampling operations shall be such as not to change the pollutant concentration.

1.2.8. Filters may be used in order to extract the solid particles from the sample.

1.2.9. The various valves used to direct the exhaust gases shall be of a quick-adjustment, quick-acting type.

1.2.10. Quick-fastening gas-tight connections may be used between the three-way valves and the sampling bags, the connections sealing themselves automatically on the bag side. Other systems may be used for conveying the samples to the analyser (three-way stop valves, for example).

1.2.11. Storage of the sample

The gas samples shall be collected in sampling bags of sufficient capacity not to impede the sample flow; the bag material shall be such as to affect neither the measurements themselves nor the chemical composition of the gas samples by more than ±2 per cent after 20 minutes (for instance: laminated polyethylene/polyamide films, or fluorinated polyhydrocarbons).

1.2.12. Hydrocarbon Sampling System – Diesel Engines

1.2.12.1. The hydrocarbon sampling system shall consist of a heated sampling probe, line, filter and pump. The sampling probe shall be installed at the same distance from the exhaust gas inlet as the particulate sampling probe, in such a way that neither interferes with samples taken by the other. It shall have a minimum internal diameter of 4 mm.

1.2.12.2. All heated parts shall be maintained at a temperature of 463 K (190 °C) 10 K by the heating system.

1.2.12.3. The average concentration of the measured hydrocarbons shall be determined by integration.

1.2.12.4. The heated sampling line shall be fitted with a heated filter (FH) 99 per cent efficient with particles ≥ 0.3 μm, to extract any solid particles from the continuous flow of gas required for analysis.

1.2.12.5. The sampling system response time (from the probe to the analyser inlet) shall be no more than four seconds.

1.2.12.6. The HFID shall be used with a constant flow (heat exchanger) system to ensure a representative sample, unless compensation for varying CFV or CFO flow is made.

1.3. Gas Analysis Requirements

1.3.1. Carbon monoxide (CO) and carbon dioxide (CO2) analyses:

Analysers shall be of the non-dispersive infra-red (NDIR) absorption type.

1.3.2. Total Hydrocarbons (THC) analysis - spark-ignition engines:

The analyser shall be of the flame ionisation (FID) type calibrated with propane gas expressed equivalent to carbon atoms (C1).

1.3.3. Total Hydrocarbons (THC) analysis - compression-ignition engines:

The analyser shall be of the flame ionisation type with detector, valves, pipework, etc., heated to 463 K (190 °C) 10 K (HFID). It shall be calibrated with propane gas expressed equivalent to carbon atoms (C1).

1.3.4. Nitrogen oxide (NOx) analysis:

The analyser shall be either of the chemi-luminescent (CLA) or of the non-dispersive ultra-violet resonance absorption (NDUVR) type, both with NOx-NO converters.

1.3.5. Methane (CH4) analysis:

The analyser shall be either a gas chromatograph combined with a flame ionisation (FID), or a flame ionisation (FID) with a non-methane cutter type, calibrated with methane gas expressed equivalent to carbon atoms (C1).

1.3.6. The analysers shall have a measuring range compatible with the accuracy required to measure the concentrations of the exhaust gas sample pollutants.

1.3.7. Measurement error shall not exceed 2 per cent (intrinsic error of analyser) disregarding the true value for the calibration gases.

1.3.8. For concentrations of less than 100 ppm, the measurement error shall not exceed 2 ppm.

1.3.9. The ambient air sample shall be measured on the same analyser with an appropriate range.

1.3.10. No gas drying device shall be used before the analysers unless shown to have no effect on the pollutant content of the gas stream.

1.4. Recommended System Descriptions

Figure 10 is a schematic drawing of the system for gaseous emissions sampling.

Figure 10

Gaseous Emissions Sampling Schematic

The components of the system are as follows:

1.4.1. Two sampling probes (S1 and S2) for continuous sampling of the dilution air and of the diluted exhaust-gas/air mixture;

1.4.2. A filter (F), to extract solid particles from the flows of gas collected for analysis;

1.4.3. Pumps (P), to collect a constant flow of the dilution air as well as of the diluted exhaust-gas/air mixture during the test;

1.4.4. Flow controller (N), to ensure a constant uniform flow of the gas samples taken during the course of the test from sampling probes S1 and S2 (for PDP-CVS) and flow of the gas samples shall be such that, at the end of each test, the quantity of the samples is sufficient for analysis (approximately 10 litres per minute);

1.4.5. Flow meters (FL), for adjusting and monitoring the constant flow of gas samples during the test;

1.4.6. Quick-acting valves (V), to divert a constant flow of gas samples into the sampling bags or to the outside vent;

1.4.7. Gas-tight, quick-lock coupling elements (Q) between the quick-acting valves and the sampling bags; the coupling shall close automatically on the sampling-bag side; as an alternative, other ways of transporting the samples to the analyser may be used (three-way stopcocks, for instance);

1.4.8. Bags (B), for collecting samples of the diluted exhaust gas and of the dilution air during the test;

1.4.9. A sampling critical-flow venturi (SV), to take proportional samples of the diluted exhaust gas at sampling probe S2 A(CFV-CVS only);

1.4.10. A scrubber (PS), in the sampling line (CFV-CVS only);

1.4.11. Components for hydrocarbon sampling using HFID:

Fh is a heated filter,

S3 is a sampling point close to the mixing chamber,

Vh is a heated multi-way valve,

Q is a quick connector to allow the ambient air sample BA to be analysed on the HFID,

FID is a heated flame ionisation analyser,

R and I are a means of integrating and recording the instantaneous hydrocarbon concentrations,

Lh is a heated sample line.

2. Calibration procedures

2.1. Analyser Calibration Procedure

2.1.1. Each analyser shall be calibrated as often as necessary and in any case in the month before type approval testing and at least once every six months for verifying conformity of production.

2.1.2. Each normally used operating range shall be calibrated by the following procedure:

2.1.2.1. The analyser calibration curve is established by at least five calibration points spaced as uniformly as possible. The nominal concentration of the calibration gas of the highest concentration shall be not less than 80 per cent of the full scale.

2.1.2.2. The calibration gas concentration required may be obtained by means of a gas divider, diluting with purified N2 or with purified synthetic air. The accuracy of the mixing device shall be such that the concentrations of the diluted calibration gases may be determined to within ±2 per cent.

2.1.2.3. The calibration curve is calculated by the least squares method. If the resulting polynomial degree is greater than 3, the number of calibration points shall be at least equal to this polynomial degree plus 2.

2.1.2.4. The calibration curve shall not differ by more than 2 per cent from the nominal value of each calibration gas.

2.1.3. Trace of the calibration curve

From the trace of the calibration curve and the calibration points, it is possible to verify that the calibration has been carried out correctly. The different characteristic parameters of the analyser shall be indicated, particularly:

The scale;

The sensitivity;

The zero point;

The date of carrying out the calibration.

2.1.4. If it can be shown to the satisfaction of the technical service that alternative technology (e.g. computer, electronically controlled range switch, etc.) can give equivalent accuracy, then these alternatives may be used.

2.2. Analyser Verification Procedure

2.2.1. Each normally used operating range shall be checked prior to each analysis in accordance with the following:

2.2.2. The calibration shall be checked by use of a zero gas and by use of a span gas that has a nominal value within 80-95 per cent of the supposed value to be analysed.

2.2.3. If, for the two points considered, the value found does not differ by more than 5 per cent of the full scale from the theoretical value, the adjustment parameters may be modified. Should this not be the case, a new calibration curve shall be established in accordance with paragraph 1. of this appendix.

2.2.4. After testing, zero gas and the same span gas are used for re-checking. The analysis is considered acceptable if the difference between the two measuring results is less than 2 per cent.

2.3. FID Hydrocarbon Response Check Procedure

2.3.1. Detector response optimisation

The FID shall be adjusted, as specified by the instrument manufacturer. Propane in air should be used, to optimise the response, on the most common operating range.

2.3.2. Calibration of the HC analyser

The analyser should be calibrated using propane in air and purified synthetic air (see paragraph 3 of this appendix).

Establish a calibration curve as described in paragraph 2.1. of this appendix.

2.3.3. Response factors of different hydrocarbons and recommended limits

The response factor (Rf), for a particular hydrocarbon species is the ratio of the FID C1 reading to the gas cylinder concentration, expressed as ppm C1.

The concentration of the test gas shall be at a level to give a response of approximately 80 per cent of full-scale deflection, for the operating range. The concentration shall be known, to an accuracy of 2 per cent in reference to a gravimetric standard expressed in volume. In addition, the gas cylinder shall be pre-conditioned for 24 hours at a temperature between 293 K and 303 K (20 and 30 °C).

Response factors should be determined when introducing an analyser into service and thereafter at major service intervals. The test gases to be used and the recommended response factors are:

Methane and purified air: 1.00 < Rf < 1.15

or 1.00 < Rf < 1.05 for NG/biomethane fuelled vehicles

Propylene and purified air: 0.90 < Rf < 1.00

Toluene and purified air: 0.90 < Rf < 1.00

These are relative to a response factor (Rf) of 1.00 for propane and purified air.

2.3.4. Oxygen interference check and recommended limits

The response factor shall be determined as described in paragraph 2.3.3. above. The test gas to be used and recommended response factor range is:

Propane and nitrogen: 0.95 < Rf < 1.05

2.4. NOx Converter Efficiency Test Procedure

The efficiency of the converter used for the conversion of NO2 into NO is tested as follows:

Using the test set up as shown in Figure 11 and the procedure described below, the efficiency of converters can be tested by means of an ozonator.

2.4.1. Calibrate the analyzer in the most common operating range following the manufacturer's specifications using zero and span gas (the NO content of which shall amount to about 80 per cent of the operating range and the NO2 concentration of the gas mixture shall be less than 5 per cent of the NO concentration). The NOx analyser shall be in the NO mode so that the span gas does not pass through the converter. Record the indicated concentration.

2.4.2. Via a T-fitting, oxygen or synthetic air is added continuously to the span gas flow until the concentration indicated is about 10 per cent less than the indicated calibration concentration given in paragraph 2.4.1. above. Record the indicated concentration (c). The ozonator is kept deactivated throughout this process.

2.4.3. The ozonator is now activated to generate enough ozone to bring the NO concentration down to 20 per cent (minimum 10 per cent) of the calibration concentration given in paragraph 2.4.1. above. Record the indicated concentration (d).

2.4.4. The NOx analyser is then switched to the NOx mode, which means that the gas mixture (consisting of NO, NO2, O2 and N2 ) now passes through the converter. Record the indicated concentration (a).

2.4.5. The ozonator is now deactivated. The mixture of gases described in paragraph 2.4.2. above passes through the converter into the detector. Record the indicated concentration (b).

Figure 11

NOx Converter Efficiency Test Configuration

2.4.6. With the ozonator deactivated, the flow of oxygen or synthetic air is also shut off. The NO2 reading of the analyser shall then be no more than 5 per cent above the figure given in paragraph 2.4.1. above.

2.4.7. The efficiency of the NOx converter is calculated as follows:

2.4.8. The efficiency of the converter shall not be less than 95 per cent.

2.4.9. The efficiency of the converter shall be tested at least once a week.

3. Reference gases

3.1. Pure gases

The following pure gases shall be available, if necessary, for calibration and operation:

Purified nitrogen: (purity: ≤ 1 ppm C, ≤ 1 ppm CO, ≤ 400 ppm CO2, ≤ 0.1 ppm NO);

Purified synthetic air: (purity: ≤ 1 ppm C, ≤ 1 ppm CO, ≤ 400 ppm CO2, ≤ 0.1 ppm NO); oxygen content between 18 and 21 per cent volume;

Purified oxygen: (purity > 99.5 per cent vol. O2);

Purified hydrogen (and mixture containing helium): (purity ≤ 1 ppm C, ≤400 ppm CO2);

Carbon monoxide: (minimum purity 99.5 per cent);

Propane: (minimum purity 99.5 per cent).

3.2. Calibration and span gases

Mixtures of gases having the following chemical compositions shall be available:

(a) C3 H8 and purified synthetic air (see paragraph 3.1. above);

(b) CO and purified nitrogen;

NO and purified nitrogen (the amount of NO2 contained in this calibration gas shall not exceed 5 per cent of the NO content).

The true concentration of a calibration gas shall be within 2 per cent of the stated figure.

Annex 4a -Appendix 4

Particulate mass emissions measurement equipment

1. Specification

1.1. System Overview

1.1.1. The particulate sampling unit shall consist of a sampling probe located in the dilution tunnel, a particle transfer tube, a filter holder, a partial-flow pump, and flow rate regulators and measuring units.

1.1.2. It is recommended that a particle size pre-classifier (e.g. cyclone or impactor) be employed upstream of the filter holder. However, a sampling probe, acting as an appropriate size-classification device such as that shown in Figure 13, is acceptable.

1.2. General Requirements

1.2.1. The sampling probe for the test gas flow for particulates shall be so arranged within the dilution tract that a representative sample gas flow can be taken from the homogeneous air/exhaust mixture.

1.2.2. The particulate sample flow rate shall be proportional to the total flow of diluted exhaust gas in the dilution tunnel to within a tolerance of ±5 per cent of the particulate sample flow rate.

1.2.3. The sampled dilute exhaust gas shall be maintained at a temperature below 325 K (52 °C) within 20 cm upstream or downstream of the particulate filter face, except in the case of a regeneration test where the temperature must be below 192 °C.

1.2.4. The particulate sample shall be collected on a single filter mounted within a holder in the sampled dilute exhaust gas flow.

1.2.5. All parts of the dilution system and the sampling system from the exhaust pipe up to the filter holder, which are in contact with raw and diluted exhaust gas, shall be designed to minimise deposition or alteration of the particulates. All parts shall be made of electrically conductive materials that do not react with exhaust gas components, and shall be electrically grounded to prevent electrostatic effects.

1.2.6. If it is not possible to compensate for variations in the flow rate, provision shall be made for a heat exchanger and a temperature control device as specified in Appendix 2 so as to ensure that the flow rate in the system is constant and the sampling rate accordingly proportional.

1.3. Specific Requirements

1.3.1. PM Sampling Probe

1.3.1.1. The sample probe shall deliver the particle-size classification performance described in paragraph 1.3.1.4. It is recommended that this performance be achieved by the use of a sharp-edged, open-ended probe facing directly into the direction of flow plus a pre-classifier (cyclone impactor, etc.). An appropriate sampling probe, such as that indicated in Figure 13, may alternatively be used provided it achieves the pre-classification performance described in paragraph 1.3.1.4.

1.3.1.2. The sample probe shall be installed near the tunnel centreline, between 10 and 20 tunnel diameters downstream of the exhaust gas inlet to the tunnel and have an internal diameter of at least 12 mm.

If more than one simultaneous sample is drawn from a single sample probe, the flow drawn from that probe shall be split into identical sub-flows to avoid sampling artefacts.

If multiple probes are used, each probe shall be sharp-edged, open-ended and facing directly into the direction of flow. Probes shall be equally spaced around the central longitudinal axis of the dilution tunnel, with the spacing between probes at least 5 cm.

1.3.1.3. The distance from the sampling tip to the filter mount shall be at least five probe diameters, but shall not exceed 1,020 mm.

1.3.1.4. The pre-classifier (e.g. cyclone, impactor, etc.) shall be located upstream of the filter holder assembly. The pre-classifier 50 per cent cut point particle diameter shall be between 2.5 µm and 10 µm at the volumetric flow rate selected for sampling particulate mass emissions. The pre-classifier shall allow at least 99 per cent of the mass concentration of 1 µm particles entering the pre-classifier to pass through the exit of the pre-classifier at the volumetric flow rate selected for sampling particulate mass emissions. However, a sampling probe, acting as an appropriate size-classification device, such as that shown in Figure 13, is acceptable as an alternative to a separate pre-classifier.

1.3.2. Sample Pump and Flow Meter

1.3.2.1. The sample gas flow measurement unit shall consist of pumps, gas flow regulators and flow measuring units.

1.3.2.2. The temperature of the gas flow in the flow meter may not fluctuate by more than ±3 K, except during regeneration tests on vehicles equipped with periodically regenerating after treatment devices. In addition, the sample mass flow rate must remain proportional to the total flow of diluted exhaust gas to within a tolerance of ±5 per cent of the particulate sample mass flow rate. Should the volume of flow change unacceptably as a result of excessive filter loading, the test shall be stopped. When it is repeated, the rate of flow shall be decreased.

1.3.3. Filter and Filter Holder

1.3.3.1. A valve shall be located downstream of the filter in the direction of flow. The valve shall be quick enough acting to open and close within 1 s of the start and end of test.

1.3.3.2. It is recommended that the mass collected on the 47 mm diameter filter (Pe) is ≥ 20 µg and that the filter loading should be maximized consistent with the requirements of paragraphs 1.2.3. and 1.3.3.

1.3.3.3. For a given test the gas filter face velocity shall be set to a single value within the range 20 cm/s to 80 cm/s unless the dilution system is being operated with sampling flow proportional to CVS flow rate.

1.3.3.4. Fluorocarbon coated glass fibre filters or fluorocarbon membrane filters are required. All filter types shall have a 0.3 µm DOP (di-octylphthalate) collection efficiency of at least 99 per cent at a gas filter face velocity of at least 35 cm/s.

1.3.3.5. The filter holder assembly shall be of a design that provides an even flow distribution across the filter stain area. The filter stain area shall be at least 1,075 mm2.

1.3.4. Filter Weighing Chamber and Balance

1.3.4.1. The microgram balance used to determine the weight of a filter shall have a precision (standard deviation) of 2 µg and resolution of 1 µg or better.

It is recommended that the microbalance be checked at the start of each weighing session by weighing one reference weight of 50 mg. This weight shall be weighed three times and the average result recorded. If the average result of the weighings is ±5 µg of the result from the previous weighing session then the weighing session and balance are considered valid.

The weighing chamber (or room) shall meet the following conditions during all filter conditioning and weighing operations:

Temperature maintained at 295 ±3 K (22 ±3 °C);

Relative humidity maintained at 45 ±8 per cent;

Dewpoint maintained at 9.5 °C ±3 °C.

It is recommended that temperature and humidity conditions are recorded along with sample and reference filter weights.

1.3.4.2. Buoyancy Correction

All filter weights shall be corrected for filter buoyancy in air.

The buoyancy correction depends on the density of the sample filter medium, the density of air, and the density of the calibration weight used to calibrate the balance. The density of the air is dependent on the pressure, temperature and humidity.

It is recommended that the temperature and dew point of the weighing environment are controlled to 22 °C ±1 °C and dew point of 9.5 °C ±1 °C respectively. However, the minimum requirements stated in paragraph 1.3.4.1. will also result in an acceptable correction for buoyancy effects. The correction for buoyancy shall be applied as follows:

Where:
mcorr	=	PM mass corrected for buoyancy
muncorr	=	PM mass uncorrected for buoyancy
ρair	=	density of air in balance environment
ρweight	=	density of calibration weight used to span balance
ρmedia	=	density of PM sample medium (filter) according to the table below:

Filter Medium			ρmedia
Teflon coated glass fibre (e.g. TX40)			2,300 kg/m3

ρair can be calculated as follows:

Where:
Pabs	=	absolute pressure in balance environment,
Mmix	=	molar mass of air in balance environment (28.836 gmol-1),
R	=	molar gas constant (8.314 Jmol-1K-1),
Tamb	=	absolute ambient temperature of balance environment.

The chamber (or room) environment shall be free of any ambient contaminants (such as dust) that would settle on the particulate filters during their stabilisation.

Limited deviations from weighing room temperature and humidity specifications will be allowed provided their total duration does not exceed 30 minutes in any one filter conditioning period. The weighing room should meet the required specifications prior to personal entrance into the weighing room. During the weighing operation no deviations from the specified conditions are permitted.

1.3.4.3. The effects of static electricity shall be nullified. This may be achieved by grounding the balance through placement upon an antistatic mat and neutralisation of the particulate filters prior to weighing using a Polonium neutraliser or a device of similar effect. Alternatively nullification of static effects may be achieved through equalisation of the static charge.

1.3.4.4. A test filter shall be removed from the chamber no earlier than an hour before the test begins.

1.4. Recommended System Description

Figure 12 is a schematic drawing of the recommended particulate sampling system. Since various configurations can produce equivalent results, exact conformance with this figure is not required. Additional components such as instruments, valves, solenoids, pumps and switches may be used to provide additional information and co-ordinate the functions of component systems. Further components that are not needed to maintain accuracy with other system configurations may be excluded if their exclusion is based upon good engineering judgement.

Figure 12

Particulate Sampling System

A sample of the diluted exhaust gas is taken from the full flow dilution tunnel DT through the particulate sampling probe PSP and the particulate transfer tube PTT by means of the pump P. The sample is passed through the particle size pre-classifier PCF and the filter holder(s) FH that contain the particulate sampling filter(s). The flow rate for sampling is set by the flow controller FC.

2. Calibration and verification procedures

2.1. Flow Meter Calibration

The Technical Service shall ensure the existence of a calibration certificate for the flow meter demonstrating compliance with a traceable standard within a 12 month period prior to the test, or since any repair or change which could influence calibration.

2.2. Microbalance Calibration

The Technical Service shall ensure the existence of a calibration certificate for the microbalance demonstrating compliance with a traceable standard within a 12 months period prior to the test.

2.3. Reference Filter Weighing

To determine the specific reference filter weights, at least two unused reference filters shall be weighed within 8 hours of, but preferably at the same time as, the sample filter weighings. Reference filters shall be of the same size and material as the sample filter.

If the specific weight of any reference filter changes by more than ±5µg between sample filter weighings, then the sample filter and reference filters shall be reconditioned in the weighing room and then reweighed.

The comparison of reference filter weighings shall be made between the specific weights and the rolling average of that reference filter's specific weights.

The rolling average shall be calculated from the specific weights collected in the period since the reference filters were placed in the weighing room. The averaging period shall be at least 1 day but not exceed 30 days.

Multiple reconditioning and reweighings of the sample and reference filters are permitted until a period of 80 h has elapsed following the measurement of gases from the emissions test.

If, prior to or at the 80 h point, more than half the number of reference filters meet the ±5 µg criterion, then the sample filter weighing can be considered valid.

If, at the 80 h point, two reference filters are employed and one filter fails the ±5 µg criterion, the sample filter weighing can be considered valid under the condition that the sum of the absolute differences between specific and rolling averages from the two reference filters must be less than or equal to 10 µg.

In case less than half of the reference filters meet the ±5 µg criterion the sample filter shall be discarded, and the emissions test repeated. All reference filters must be discarded and replaced within 48 hours.

In all other cases, reference filters must be replaced at least every 30 days and in such a manner that no sample filter is weighed without comparison to a reference filter that has been present in the weighing room for at least 1 day.

If the weighing room stability criteria outlined in paragraph 1.3.4. are not met, but the reference filter weighings meet the above criteria, the vehicle manufacturer has the option of accepting the sample filter weights or voiding the tests, fixing the weighing room control system and re-running the test.

Figure 13

Particulate sampling probe configuration

Annexe 4a -Appendix 5

Particle number emissions measurement equipment

1. Specification

1.1. System Overview

1.1.1. The particle sampling system shall consist of a dilution tunnel, a sampling probe and a volatile particle remover (VPR) upstream of a particle number counter (PNC) and suitable transfer tubing.

1.1.2. It is recommended that a particle size pre-classifier (e.g. cyclone, impactor etc) be located prior to the inlet of the VPR. However, a sample probe acting as an appropriate size-classification device, such as that shown in Figure 13, is an acceptable alternative to the use of a particle size pre-classifier.

1.2. General Requirements

1.2.1. The particle sampling point shall be located within a dilution tunnel.

The sampling probe tip (PSP) and particle transfer tube (PTT) together comprise the particle transfer system (PTS). The PTS conducts the sample from the dilution tunnel to the entrance of the VPR. The PTS shall meet the following conditions:

It shall be installed near the tunnel centre line, 10 to 20 tunnel diameters downstream of the gas inlet, facing upstream into the tunnel gas flow with its axis at the tip parallel to that of the dilution tunnel.

It shall have an internal diameter of ≥ 8 mm.

Sample gas drawn through the PTS shall meet the following conditions:

It shall have a flow Reynolds number (Re) of < 1,700;

It shall have a residence time in the PTS of ≤ 3 seconds.

Any other sampling configuration for the PTS for which equivalent particle penetration at 30 nm can be demonstrated will be considered acceptable.

The outlet tube (OT) conducting the diluted sample from the VPR to the inlet of the PNC shall have the following properties:

It shall have an internal diameter of ≥ 4 mm;

Sample Gas flow through the OT shall have a residence time of ≤ 0.8 seconds.

Any other sampling configuration for the OT for which equivalent particle penetration at 30 nm can be demonstrated will be considered acceptable.

1.2.2. The VPR shall include devices for sample dilution and for volatile particle removal. The sampling probe for the test gas flow shall be so arranged within the dilution tract that a representative sample gas flow is taken from a homogeneous air/exhaust mixture.

1.2.3. All parts of the dilution system and the sampling system from the exhaust pipe up to the PNC, which are in contact with raw and diluted exhaust gas, shall be designed to minimise deposition of the particles. All parts shall be made of electrically conductive materials that do not react with exhaust gas components, and shall be electrically grounded to prevent electrostatic effects.

1.2.4. The particle sampling system shall incorporate good aerosol sampling practice that includes the avoidance of sharp bends and abrupt changes in cross-section, the use of smooth internal surfaces and the minimisation of the length of the sampling line. Gradual changes in the cross-section are permissible.

1.3. Specific Requirements

1.3.1. The particle sample shall not pass through a pump before passing through the PNC.

1.3.2. A sample pre-classifier is recommended.

1.3.3. The sample preconditioning unit shall:

1.3.3.1. Be capable of diluting the sample in one or more stages to achieve a particle number concentration below the upper threshold of the single particle count mode of the PNC and a gas temperature below 35 °C at the inlet to the PNC;

1.3.3.2. Include an initial heated dilution stage which outputs a sample at a temperature of  150 °C and ≤ 400 °C and dilutes by a factor of at least 10;

1.3.3.3. Control heated stages to constant nominal operating temperatures, within the range specified in paragraph 1.3.3.2., to a tolerance of ±10 °C. Provide an indication of whether or not heated stages are at their correct operating temperatures.

1.3.3.4. Achieve a particle concentration reduction factor (fr(di)), as defined in paragraph 2.2.2., for particles of 30 nm and 50 nm electrical mobility diameters, that is no more than 30 per cent and 20 per cent respectively higher, and no more than 5 per cent lower than that for particles of 100 nm electrical mobility diameter for the VPR as a whole;

1.3.3.5. Also achieve > 99.0 per cent vaporisation of 30 nm tetracontane (CH3(CH2)38CH3) particles, with an inlet concentration of ≥ 10,000 cm-3, by means of heating and reduction of partial pressures of the tetracontane.

1.3.4. The PNC shall:

1.3.4.1. Operate under full flow operating conditions;

1.3.4.2. Have a counting accuracy of ±10 per cent across the range 1 cm-3 to the upper threshold of the single particle count mode of the PNC against a traceable standard. At concentrations below 100 cm-3 measurements averaged over extended sampling periods may be required to demonstrate the accuracy of the PNC with a high degree of statistical confidence;

1.3.4.3. Have a readability of at least 0.1 particles cm-3 at concentrations below 100 cm-3;

1.3.4.4. Have a linear response to particle concentrations over the full measurement range in single particle count mode;

1.3.4.5. Have a data reporting frequency equal to or greater than 0.5 Hz;

1.3.4.6. Have a T90 response time over the measured concentration range of less than 5 s;

1.3.4.7. Incorporate a coincidence correction function up to a maximum 10 per cent correction, and may make use of an internal calibration factor as determined in paragraph 2.1.3., but shall not make use of any other algorithm to correct for or define the counting efficiency;

1.3.4.8. Have counting efficiencies at particle sizes of 23 nm (±1 nm) and 41 nm (±1 nm) electrical mobility diameter of 50 per cent (±12 per cent) and > 90 per cent respectively. These counting efficiencies may be achieved by internal (for example; control of instrument design) or external (for example; size pre-classification) means;

1.3.4.9. If the PNC makes use of a working liquid, it shall be replaced at the frequency specified by the instrument manufacturer.

1.3.5. Where they are not held at a known constant level at the point at which PNC flow rate is controlled, the pressure and/or temperature at inlet to the PNC must be measured and reported for the purposes of correcting particle concentration measurements to standard conditions.

1.3.6. The sum of the residence time of the PTS, VPR and OT plus the T90 response time of the PNC shall be no greater than 20 s.

1.4. Recommended System Description

The following section contains the recommended practice for measurement of particle number. However, any system meeting the performance specifications in paragraphs 1.2. and 1.3. is acceptable.

Figure 14 is a schematic drawing of the recommended particle sampling system.

Figure 14

Schematic of Recommended Particle Sampling System

1.4.1. Sampling System Description

The particle sampling system shall consist of a sampling probe tip in the dilution tunnel (PSP), a particle transfer tube (PTT), a particle pre-classifier (PCF) and a volatile particle remover (VPR) upstream of the particle number concentration measurement (PNC) unit. The VPR shall include devices for sample dilution (particle number diluters: PND1 and PND2) and particle evaporation (Evaporation tube, ET). The sampling probe for the test gas flow shall be so arranged within the dilution tract that a representative sample gas flow is taken from a homogeneous air/exhaust mixture. The sum of the residence time of the system plus the T90 response time of the PNC shall be no greater than 20 s.

1.4.2. Particle Transfer System

The sampling probe tip (PSP) and particle transfer tube (PTT) together comprise the particle transfer system (PTS). The PTS conducts the sample from the dilution tunnel to the entrance to the first particle number diluter. The PTS shall meet the following conditions:

It shall have an internal diameter of ≥ 8 mm.

Sample gas drawn through the PTS shall meet the following conditions:

It shall have a flow Reynolds number (Re) of < 1.700;

It shall have a residence time in the PTS of ≤ 3 seconds.

Any other sampling configuration for the PTS for which equivalent particle penetration for particles of 30 nm electrical mobility diameter can be demonstrated will be considered acceptable.

The outlet tube (OT) conducting the diluted sample from the VPR to the inlet of the PNC shall have the following properties:

It shall have an internal diameter of ≥ 4 mm;

Sample Gas flow through the POT shall have a residence time of ≤ 0.8 seconds.

Any other sampling configuration for the OT for which equivalent particle penetration for particles of 30 nm electrical mobility diameter can be demonstrated will be considered acceptable.

1.4.3. Particle Pre-classifier

The recommended particle pre-classifier shall be located upstream of the VPR. The pre-classifier 50 per cent cut point particle diameter shall be between 2.5 µm and 10 µm at the volumetric flow rate selected for sampling particle number emissions. The pre-classifier shall allow at least 99 per cent of the mass concentration of 1 µm particles entering the pre-classifier to pass through the exit of the pre-classifier at the volumetric flow rate selected for sampling particle number emissions.

1.4.4. Volatile Particle Remover (VPR)

The VPR shall comprise one particle number diluter (PND1), an evaporation tube and a second diluter (PND2) in series. This dilution function is to reduce the number concentration of the sample entering the particle concentration measurement unit to less than the upper threshold of the single particle count mode of the PNC and to suppress nucleation within the sample. The VPR shall provide an indication of whether or not PND1 and the evaporation tube are at their correct operating temperatures.

The VPR shall achieve > 99.0 per cent vaporisation of 30 nm tetracontane (CH3(CH2)38CH3) particles, with an inlet concentration of ≥ 10,000 cm-3, by means of heating and reduction of partial pressures of the tetracontane. It shall also achieve a particle concentration reduction factor (fr) for particles of 30 nm and 50 nm electrical mobility diameters, that is no more than 30 per cent and 20 per cent respectively higher, and no more than 5 per cent lower than that for particles of 100 nm electrical mobility diameter for the VPR as a whole.

1.4.4.1. First Particle Number Dilution Device (PND1)

The first particle number dilution device shall be specifically designed to dilute particle number concentration and operate at a (wall) temperature of 150 °C ‑ 400 °C. The wall temperature setpoint should be held at a constant nominal operating temperature, within this range, to a tolerance of ±10 °C and not exceed the wall temperature of the ET (paragraph 1.4.4.2.). The diluter should be supplied with HEPA filtered dilution air and be capable of a dilution factor of 10 to 200 times.

1.4.4.2. Evaporation Tube

The entire length of the ET shall be controlled to a wall temperature greater than or equal to that of the first particle number dilution device and the wall temperature held at a fixed nominal operating temperature between 300 °C and 400 °C, to a tolerance of ±10 °C.

1.4.4.3. Second Particle Number Dilution Device (PND2)

PND2 shall be specifically designed to dilute particle number concentration. The diluter shall be supplied with HEPA filtered dilution air and be capable of maintaining a single dilution factor within a range of 10 to 30 times. The dilution factor of PND2 shall be selected in the range between 10 and 15 such that particle number concentration downstream of the second diluter is less than the upper threshold of the single particle count mode of the PNC and the gas temperature prior to entry to the PNC is < 35 °C.

1.4.5. Particle Number Counter (PNC)

The PNC shall meet the requirements of paragraph 1.3.4.

2. Calibration/validation of the particle sampling system [7]

2.1. Calibration of the Particle Number Counter

2.1.1. The Technical Service shall ensure the existence of a calibration certificate for the PNC demonstrating compliance with a traceable standard within a 12 month period prior to the emissions test.

2.1.2. The PNC shall also be recalibrated and a new calibration certificate issued following any major maintenance.

2.1.3. Calibration shall be traceable to a standard calibration method:

(a) By comparison of the response of the PNC under calibration with that of a calibrated aerosol electrometer when simultaneously sampling electrostatically classified calibration particles; or

(b) By comparison of the response of the PNC under calibration with that of a second PNC which has been directly calibrated by the above method.

In the electrometer case, calibration shall be undertaken using at least six standard concentrations spaced as uniformly as possible across the PNC's measurement range. These points will include a nominal zero concentration point produced by attaching HEPA filters of at least class H13 of EN 1822:2008, or equivalent performance, to the inlet of each instrument. With no calibration factor applied to the PNC under calibration, measured concentrations shall be within ±10 per cent of the standard concentration for each concentration used, with the exception of the zero point, otherwise the PNC under calibration shall be rejected. The gradient from a linear regression of the two data sets shall be calculated and recorded. A calibration factor equal to the reciprocal of the gradient shall be applied to the PNC under calibration. Linearity of response is calculated as the square of the Pearson product moment correlation coefficient (R2) of the two data sets and shall be equal to or greater than 0.97. In calculating both the gradient and R2 the linear regression shall be forced through the origin (zero concentration on both instruments).

In the reference PNC case, calibration shall be undertaken using at least six standard concentrations across the PNC's measurement range. At least three points shall be at concentrations below 1,000 cm-3, the remaining concentrations shall be linearly spaced between 1,000 cm-3 and the maximum of the PNC's range in single particle count mode. These points will include a nominal zero concentration point produced by attaching HEPA filters of at least class H13 of EN 1822:2008, or equivalent performance, to the inlet of each instrument. With no calibration factor applied to the PNC under calibration, measured concentrations shall be within ±10 per cent of the standard concentration for each concentration, with the exception of the zero point, otherwise the PNC under calibration shall be rejected. The gradient from a linear regression of the two data sets shall be calculated and recorded. A calibration factor equal to the reciprocal of the gradient shall be applied to the PNC under calibration. Linearity of response is calculated as the square of the Pearson product moment correlation coefficient (R2) of the two data sets and shall be equal to or greater than 0.97. In calculating both the gradient and R2 the linear regression shall be forced through the origin (zero concentration on both instruments).

2.1.4. Calibration shall also include a check, against the requirements in paragraph 1.3.4.8., on the PNC's detection efficiency with particles of 23 nm electrical mobility diameter. A check of the counting efficiency with 41 nm particles is not required.

2.2. Calibration/Validation of the Volatile Particle Remover

2.2.1. Calibration of the VPR's particle concentration reduction factors across its full range of dilution settings, at the instrument’s fixed nominal operating temperatures, shall be required when the unit is new and following any major maintenance. The periodic validation requirement for the VPR's particle concentration reduction factor is limited to a check at a single setting, typical of that used for measurement on diesel particulate filter equipped vehicles. The Technical Service shall ensure the existence of a calibration or validation certificate for the volatile particle remover within a 6 month period prior to the emissions test. If the volatile particle remover incorporates temperature monitoring alarms a 12 month validation interval shall be permissible.

The VPR shall be characterised for particle concentration reduction factor with solid particles of 30 nm, 50 nm and 100 nm electrical mobility diameter. Particle concentration reduction factors (fr(d)) for particles of 30 nm and 50 nm electrical mobility diameters shall be no more than 30 per cent and 20 per cent higher respectively, and no more than 5 per cent lower than that for particles of 100 nm electrical mobility diameter. For the purposes of validation, the mean particle concentration reduction factor shall be within ±10 per cent of the mean particle concentration reduction factor () determined during the primary calibration of the VPR.

2.2.2. The test aerosol for these measurements shall be solid particles of 30, 50 and 100 nm electrical mobility diameter and a minimum concentration of 5,000 particles cm-3 at the VPR inlet. Particle concentrations shall be measured upstream and downstream of the components.

The particle concentration reduction factor at each particle size (fr(di)) shall be calculated as follows;

Where:
Nin(di)	=	upstream particle number concentration for particles of diameter di;
Nout(di)	=	downstream particle number concentration for particles of diameter di; and
di	=	particle electrical mobility diameter (30, 50 or 100 nm).
Nin(di) and Nout(di) shall be corrected to the same conditions.

The mean particle concentration reduction () at a given dilution setting shall be calculated as follows;

It is recommended that the VPR is calibrated and validated as a complete unit.

2.2.3. The Technical Service shall ensure the existence of a validation certificate for the VPR demonstrating effective volatile particle removal efficiency within a 6 month period prior to the emissions test. If the volatile particle remover incorporates temperature monitoring alarms a 12 month validation interval shall be permissible. The VPR shall demonstrate greater than 99.0 per cent removal of tetracontane (CH3(CH2)38CH3) particles of at least 30 nm electrical mobility diameter with an inlet concentration of ≥ 10,000 cm-3 when operated at its minimum dilution setting and manufacturers recommended operating temperature.

2.3. Particle Number System Check Procedures

2.3.1. Prior to each test, the particle counter shall report a measured concentration of less than 0.5 particles cm-3 when a HEPA filter of at least class H13 of EN 1822:2008, or equivalent performance, is attached to the inlet of the entire particle sampling system (VPR and PNC).

2.3.2. On a monthly basis, the flow into the particle counter shall report a measured value within 5 per cent of the particle counter nominal flow rate when checked with a calibrated flow meter.

2.3.3. Each day, following the application of a HEPA filter of at least class H13 of EN 1822:2008, or equivalent performance, to the inlet of the particle counter, the particle counter shall report a concentration of ≤ 0.2 cm-3. Upon removal of this filter, the particle counter shall show an increase in measured concentration to at least 100 particles cm-3 when challenged with ambient air and a return to ≤ 0.2 cm-3 on replacement of the HEPA filter.

2.3.4. Prior to the start of each test, it shall be confirmed that the measurement system indicates that the evaporation tube, where featured in the system, has reached its correct operating temperature.

2.3.5. Prior to the start of each test, it shall be confirmed that the measurement system indicates that the diluter PND1 has reached its correct operating temperature.

Annex 4a - Appendix 7

Measurement of vehicle road load

Resistance to progress of a vehicle measurement method on the road simulation on a chassis dynamometer

1. Object of the methods

The object of the methods defined below is to measure the resistance to progress of a vehicle at stabilized speeds on the road and to simulate this resistance on a dynamometer, in accordance with the conditions set out in paragraph 6.2.1. of Annex 4a.

2. Definition of the road

The road shall be level and sufficiently long to enable the measurements specified in this appendix to be made. The slope shall be constant to within ±0.1 per cent and shall not exceed 1.5 per cent.

3. Atmospheric conditions

3.1. Wind

Testing shall be limited to wind speeds averaging less than 3 m/s with peak speeds of less than 5 m/s. In addition, the vector component of the wind speed across the test road shall be less than 2 m/s. Wind velocity shall be measured 0.7 m above the road surface.

3.2. Humidity

The road shall be dry.

3.3. Pressure and Temperature

Air density at the time of the test shall not deviate by more than ±7.5 per cent from the reference conditions, P = 100 kPa and T = 293.2 K.

4. Vehicle preparation [8]

4.1. Selection of the test vehicle

If not all variants of a vehicle type are measured, the following criteria for the selection of the test vehicle shall be used.

4.1.1. Body

If there are different types of body, the test shall be performed on the least aerodynamic body. The manufacturer shall provide the necessary data for the selection.

4.1.2. Tyres

The widest tyre shall be chosen. If there are more than three tyre sizes, the widest minus one shall be chosen.

4.1.3. Testing mass

The testing mass shall be the reference mass of the vehicle with the highest inertia range.

4.1.4. Engine

The test vehicle shall have the largest heat exchanger(s).

4.1.5. Transmission

A test shall be carried out with each type of the following transmission:

Front-wheel drive,

Rear-wheel drive,

Full-time 4 x 4,

Part-time 4 x 4,

Automatic gearbox,

Manual gearbox.

4.2. Running-in

The vehicle shall be in normal running order and adjustment after having been run-in for at least 3,000 km. The tyres shall be run-in at the same time as the vehicle or have a tread depth within 90 and 50 per cent of the initial tread depth.

4.3. Verifications

The following checks shall be made in accordance with the manufacturer's specifications for the use considered:

Wheels, wheel trims, tyres (make, type, pressure), front axle geometry, brake adjustment (elimination of parasitic drag), lubrication of front and rear axles, adjustment of the suspension and vehicle level, etc.

4.4. Preparation for the test

4.4.1. The vehicle shall be loaded to its reference mass. The level of the vehicle shall be that obtained when the centre of gravity of the load is situated midway between the "R" points of the front outer seats and on a straight line passing through those points.

4.4.2. In the case of road tests, the windows of the vehicle shall be closed. Any covers of air climatisation systems, headlamps, etc. shall be in the non-operating position.

4.4.3. The vehicle shall be clean.

4.4.4. Immediately prior to the test, the vehicle shall be brought to normal running temperature in an appropriate manner.

5. Methods

5.1. Energy variation during coast-down method

5.1.1. On the road

5.1.1.1. Test equipment and error

Time shall be measured to an error lower than 0.1 s.

Speed shall be measured to an error lower than 2 per cent.

5.1.1.2. Test procedure

5.1.1.2.1. Accelerate the vehicle to a speed 10 km/h greater than the chosen test speed V.

5.1.1.2.2. Place the gearbox in "neutral" position.

5.1.1.2.3. Measure the time taken (t1) for the vehicle to decelerate from speed

V2 = V + ΔV km/h to V1 = V - ΔV km/h

5.1.1.2.4. Perform the same test in the opposite direction: t2.

5.1.1.2.5. Take the average T of the two times t1 and t2.

5.1.1.2.6. Repeat these tests several times such that the statistical accuracy (p) of the average

is not more than 2 per cent (p ≤ 2 per cent)

The statistical accuracy (p) is defined by:

Where:
t	=	coefficient given by the following table,
n	=	number of tests,
s	=	standard deviation,

n	4	5	6	7	8	9	10	11	12	13	14	15
t	3.2	2.8	2.6	2.5	2.4	2.3	2.3	2.2	2.2	2.2	2.2	2.2
	1.6	1.25	1.06	0.94	0.85	0.77	0.73	0.66	0.64	0.61	0.59	0.57

5.1.1.2.7. Calculate the power by the formula:

Where:
P		is expressed in kW,
V	=	speed of the test in m/s,
ΔV	=	speed deviation from speed V, in m/s as specified in paragraph 5.1.1.2.3. of this appendix,
M	=	reference mass in kg,
T	=	time in seconds (s).

5.1.1.2.8. The power (P) determined on the track shall be corrected to the reference ambient conditions as follows:

PCorrected = K · PMeasured

Where:
RR	=	rolling resistance at speed V,
RAERO	=	aerodynamic drag at speed V,
RT	=	total driving resistance = RR + RAERO,
KR	=	temperature correction factor of rolling resistance, taken to be equal to 8.64 x 10-3/°C, or the manufacturer's correction factor that is approved by the authority,
t	=	road test ambient temperature in °C,
t0	=	reference ambient temperature = 20 °C,
ρ	=	air density at the test conditions,
ρ0	=	air density at the reference conditions (20 °C, 100 kPa).

The ratios RR/RT and RAERO/RT shall be specified by the vehicle manufacturer based on the data normally available to the company.

If these values are not available, subject to the agreement of the manufacturer and the technical service concerned, the figures for the rolling/ total resistance given by the following formula may be used:

Where:
M	=	vehicle mass in kg and for each speed the coefficients a and b are shown in the following table:
V (km/h)			a	b
20			7.24 · 10-5	0.82
40			1.59 ·10-4	0.54
60			1.96 · 10-4	0.33
80			1.85 · 10-4	0.23
100			1.63 · 10-4	0.18
120			1.57 · 10-4	0.14

5.1.2. On the dynamometer

5.1.2.1. Measurement equipment and accuracy

The equipment shall be identical to that used on the road.

5.1.2.2. Test procedure

5.1.2.2.1. Install the vehicle on the test dynamometer.

5.1.2.2.2. Adjust the tyre pressure (cold) of the driving wheels as required by the dynamometer.

5.1.2.2.3. Adjust the equivalent inertia of the dynamometer.

5.1.2.2.4. Bring the vehicle and dynamometer to operating temperature in a suitable manner.

5.1.2.2.5. Carry out the operations specified in paragraph 5.1.1.2. above (with the exception of paragraphs 5.1.1.2.4. and 5.1.1.2.5.), replacing M by I in the formula set out in paragraph 5.1.1.2.7.

5.1.2.2.6. Adjust the brake to reproduce the corrected power (paragraph 5.1.1.2.8.) and to take into account the difference between the vehicle mass (M) on the track and the equivalent inertia test mass (I) to be used. This may be done by calculating the mean corrected road coast down time from V2 to V1 and reproducing the same time on the dynamometer by the following relationship:

K = value specified in paragraph 5.1.1.2.8. above.

5.1.2.2.7. The power Pa to be absorbed by the dynamometer shall be determined in order to enable the same power (paragraph 5.1.1.2.8.) to be reproduced for the same vehicle on different days.

5.2. Torque measurements method at constant speed

5.2.1. On the road

5.2.1.1. Measurement equipment and error

Torque measurement shall be carried out with an appropriate measuring device accurate to within ±2 per cent.

Speed measurement shall be accurate to within ±2 per cent.

5.2.1.2. Test procedure

5.2.1.2.1. Bring the vehicle to the chosen stabilized speed V.

5.2.1.2.2. Record the torque Ct and speed over a period of at least 20 seconds. The accuracy of the data recording system shall be at least ±1 Nm for the torque and ±0.2 km/h for the speed.

5.2.1.2.3. Differences in torque Ct and speed relative to time shall not exceed 5 per cent for each second of the measurement period.

5.2.1.2.4. The torque Ct1 is the average torque derived from the following formula:

5.2.1.2.5. The test shall be carried out three times in each direction. Determine the average torque from these six measurements for the reference speed. If the average speed deviates by more than 1 km/h from the reference speed, a linear regression shall be used for calculating the average torque.

5.2.1.2.6. Determine the average of these two torques Ct1 and Ct2, i.e. Ct.

5.2.1.2.7. The average torque CT determined on the track shall be corrected to the reference ambient conditions as follows:

CTcorrected = K · CTmeasured

Where K has the value specified in paragraph 5.1.1.2.8. of this appendix.

5.2.2. On the dynamometer

5.2.2.1. Measurement equipment and error

The equipment shall be identical to that used on the road.

5.2.2.2. Test procedure

5.2.2.2.1. Perform the operations specified in paragraphs 5.1.2.2.1. to 5.1.2.2.4. above.

5.2.2.2.2. Perform the operations specified in paragraphs 5.2.1.2.1. to 5.2.1.2.4. above.

5.2.2.2.3. Adjust the power absorption unit to reproduce the corrected total track torque indicated in paragraph 5.2.1.2.7. above.

5.2.2.2.4. Proceed with the same operations as in paragraph 5.1.2.2.7., for the same purpose.

4.3. Analytical systems

4.3.1. Hydrocarbon analyser

4.3.1.1. The atmosphere within the chamber is monitored using a hydrocarbon detector of the flame ionisation detector (FID) type. Sample gas shall be drawn from the mid-point of one side wall or roof of the chamber and any bypass flow shall be returned to the enclosure, preferably to a point immediately downstream of the mixing fan.

4.3.1.2. The hydrocarbon analyser shall have a response time to 90 per cent of final reading of less than 1.5 seconds. Its stability shall be better than 2 per cent of full scale at zero and at 80 20 per cent of full scale over a 15-minute period for all operational ranges.

4.3.1.3. The repeatability of the analyser expressed as one standard deviation shall be better than 1 per cent of full scale deflection at zero and at 80 20 per cent of full scale on all ranges used.

4.3.1.4. The operational ranges of the analyser shall be chosen to give best resolution over the measurement, calibration and leak checking procedures.

4.3.2. Hydrocarbon analyser data recording system

4.3.2.1. The hydrocarbon analyser shall be fitted with a device to record electrical signal output either by strip chart recorder or other data processing system at a frequency of at least once per minute. The recording system shall have operating characteristics at least equivalent to the signal being recorded and shall provide a permanent record of results. The record shall show a positive indication of the beginning and end of the hot soak or diurnal emission test (including beginning and end of sampling periods along with the time elapsed between start and completion of each test).

4.4. Fuel tank heating (only applicable for gasoline canister load option)

4.4.1. The fuel in the vehicle tank(s) shall be heated by a controllable source of heat; for example a heating pad of 2,000 W capacity is suitable. The heating system shall apply heat evenly to the tank walls beneath the level of the fuel so as not to cause local overheating of the fuel. Heat shall not be applied to the vapour in the tank above the fuel.

4.4.2. The tank heating device shall make it possible to heat the fuel in the tank evenly by 14 K from 289 K (16 °C) within 60 minutes, with the temperature sensor position as in paragraph 5.1.1. below. The heating system shall be capable of controlling the fuel temperature to 1.5 K of the required temperature during the tank heating process.

4.5. Temperature recording

4.5.1. The temperature in the chamber is recorded at two points by temperature sensors which are connected so as to show a mean value. The measuring points are extended approximately 0.1 m into the enclosure from the vertical centre line of each side wall at a height of 0.9 ±0.2 m.

4.5.2. The temperatures of the fuel tank(s) are recorded by means of the sensor positioned in the fuel tank as in paragraph 5.1.1. below in the case of use of the gasoline canister load option (paragraph 5.1.5. below).

4.5.3. Temperatures shall, throughout the evaporative emission measurements, be recorded or entered into a data processing system at a frequency of at least once per minute.

4.5.4. The accuracy of the temperature recording system shall be within 1.0 K and the temperature shall be capable of being resolved to 0.4 K.

4.5.5. The recording or data processing system shall be capable of resolving time to 15 seconds.

4.6. Pressure recording

4.6.1. The difference Δp between barometric pressure within the test area and the enclosure internal pressure shall, throughout the evaporative emission measurements, be recorded or entered into a data processing system at a frequency of at least once per minute.

4.6.2. The accuracy of the pressure recording system shall be within 2 kPa and the pressure shall be capable of being resolved to 0.2 kPa.

4.6.3. The recording or data processing system shall be capable of resolving time to 15 seconds.

4.7. Fans

4.7.1. By the use of one or more fans or blowers with the SHED door(s) open it shall be possible to reduce the hydrocarbons concentration in the chamber to the ambient hydrocarbon level.

4.7.2. The chamber shall have one or more fans or blowers of like capacity 0.1 to 0.5 m3/min. with which to thoroughly mix the atmosphere in the enclosure. It shall be possible to attain an even temperature and hydrocarbon concentration in the chamber during measurements. The vehicle in the enclosure shall not be subjected to a direct stream of air from the fans or blowers.

4.8. Gases

4.8.1. The following pure gases shall be available for calibration and operation:

Purified synthetic air: (purity < 1 ppm C1 equivalent,

1 ppm CO,  400 ppm CO2,  0,1 ppm NO);

oxygen content between 18 and 21 per cent by volume.

Hydrocarbon analyser fuel gas: (40 2 per cent hydrogen, and balance helium with less than 1 ppm C1 equivalent hydrocarbon, less than 400 ppm CO2),

Propane (C3H8): 99.5 per cent minimum purity.

Butane (C4H10): 98 per cent minimum purity.

Nitrogen (N2): 98 per cent minimum purity.

4.8.2. Calibration and span gases shall be available containing mixtures of propane (C3H8) and purified synthetic air. The true concentrations of a calibration gas shall be within 2 per cent of the stated figures. The accuracy of the diluted gases obtained when using a gas divider shall be to within 2 per cent of the true value. The concentrations specified in Appendix 1 may also be obtained by the use of a gas divider using synthetic air as the dilutant gas.

4.9. Additional equipment

4.9.1. The absolute humidity in the test area shall be measurable to within 5 per cent.

5. Test procedure

5.1. Test preparation

5.1.1. The vehicle is mechanically prepared before the test as follows:

(a) The exhaust system of the vehicle shall not exhibit any leaks;

(b) The vehicle may be steam-cleaned before the test;

(c) In the case of use of the gasoline canister load option (paragraph 5.1.5. below) the fuel tank of the vehicle shall be equipped with a temperature sensor to enable the temperature to be measured at the mid-point of the fuel in the fuel tank when filled to 40 per cent of its capacity;

(d) Additional fittings, adapters of devices may be fitted to the fuel system in order to allow a complete draining of the fuel tank. For this purpose it is not necessary to modify the shell of the tank;

(e) The manufacturer may propose a test method in order to take into account the loss of hydrocarbons by evaporation coming only from the fuel system of the vehicle.

5.1.2. The vehicle is taken into the test area where the ambient temperature is between 293 and 303 K (20 and 30 °C).

5.1.3. The ageing of the canister(s) has to be verified. This may be done by demonstrating that it has accumulated a minimum of 3,000 km. If this demonstration is not given, the following procedure is used. In the case of a multiple canister system each canister shall undergo the procedure separately.

5.1.3.1. The canister is removed from the vehicle. Special care shall be taken during this step to avoid damage to components and the integrity of the fuel system.

5.1.3.2. The weight of the canister shall be checked.

5.1.3.3. The canister is connected to a fuel tank, possibly an external one, filled with reference fuel, to 40 per cent volume of the fuel tank(s).

5.1.3.4. The fuel temperature in the fuel tank shall be between 183 K and 287 K (10 and 14 °C).

5.1.3.5. The (external) fuel tank is heated from 288 K to 318 K (15 to 45 °C) (1 °C increase every 9 minutes).

5.1.3.6. If the canister reaches breakthrough before the temperature reaches 318 K (45 °C), the heat source shall be turned off. Then the canister is weighed. If the canister did not reach breakthrough during the heating to 318 K (45 °C), the procedure from paragraph 5.1.3.3. above shall be repeated until breakthrough occurs.

5.1.3.7. Breakthrough may be checked as described in paragraphs 5.1.5. and 5.1.6. of this annex, or with the use of another sampling and analytical arrangement capable of detecting the emission of hydrocarbons from the canister at breakthrough.

5.1.3.8. The canister shall be purged with 25 5 litres per minute with the emission laboratory air until 300 bed volume exchanges are reached.

5.1.3.9. The weight of the canister shall be checked.

5.1.3.10. The steps of the procedure in paragraphs 5.1.3.4. to 5.1.3.9. shall be repeated nine times. The test may be terminated prior to that, after not less than three ageing cycles, if the weight of the canister after the last cycles has stabilised.

5.1.3.11. The evaporative emission canister is reconnected and the vehicle restored to its normal operating condition.

5.1.4. One of the methods specified in paragraphs 5.1.5. and 5.1.6. shall be used to precondition the evaporative canister. For vehicles with multiple canisters, each canister shall be preconditioned separately.

5.1.4.1. Canister emissions are measured to determine breakthrough.

Breakthrough is here defined as the point at which the cumulative quantity of hydrocarbons emitted is equal to 2 grams.

5.1.4.2. Breakthrough may be verified using the evaporative emission enclosure as described in paragraphs 5.1.5. and 5.1.6. respectively. Alternatively, breakthrough may be determined using an auxiliary evaporative canister connected downstream of the vehicle's canister. The auxiliary canister shall be well purged with dry air prior to loading.

5.1.4.3. The measuring chamber shall be purged for several minutes immediately before the test until a stable background is obtained. The chamber air mixing fan(s) shall be switched on at this time.

The hydrocarbon analyser shall be zeroed and spanned immediately before the test.

5.1.5. Canister loading with repeated heat builds to breakthrough

5.1.5.1. The fuel tank(s) of the vehicle(s) is (are) emptied using the fuel tank drain(s). This shall be done so as not to abnormally purge or abnormally load the evaporative control devices fitted to the vehicle. Removal of the fuel cap is normally sufficient to achieve this.

5.1.5.2. The fuel tank(s) is (are) refilled with test fuel at a temperature of between 283 K to 287 K (10 to 14 °C) to 40 2 per cent of the tank's normal volumetric capacity. The fuel cap(s) of the vehicle shall be fitted at this point.

5.1.5.3. Within one hour of being refuelled the vehicle shall be placed, with the engine shut off, in the evaporative emission enclosure. The fuel tank temperature sensor is connected to the temperature recording system. A heat source shall be properly positioned with respect to the fuel tank(s) and connected to the temperature controller. The heat source is specified in paragraph 4.4. above. In the case of vehicles fitted with more than one fuel tank, all the tanks shall be heated in the same way as described below. The temperatures of the tanks shall be identical to within 1.5 K.

5.1.5.4. The fuel may be artificially heated to the starting diurnal temperature of 293 K (20 °C) 1 K.

5.1.5.5. When the fuel temperature reaches at least 292 K (19 °C), the following steps shall be taken immediately: the purge blower shall be turned off; enclosure doors closed and sealed; and measurement initiated of the hydrocarbon level in the enclosure.

5.1.5.6. When the fuel temperature of the fuel tank reaches 293 K (20 °C) a linear heat build of 15 K (15 °C) begins. The fuel shall be heated in such a way that the temperature of the fuel during the heating conforms to the function below to within 1.5 K. The elapsed time of the heat build and temperature rise is recorded.

Tr = To + 0.2333 · t

Where:
Tr	=	required temperature (K),
To	=	initial temperature (K),
t	=	time from start of the tank heat build in minutes.

5.1.5.7. As soon as break-through occurs or when the fuel temperature reaches 308 K (35 °C), whichever occurs first, the heat source is turned off, the enclosure doors unsealed and opened, and the vehicle fuel tank cap(s) removed. If break-through has not occurred by the time the fuel temperature 308 K (35 °C), the heat source is removed from the vehicle, the vehicle removed from the evaporative emission enclosure and the entire procedure outlined in paragraph 5.1.7. below repeated until break-through occurs.

5.1.6. Butane loading to breakthrough

5.1.6.1. If the enclosure is used for the determination of the break-through (see paragraph 5.1.4.2. above) the vehicle shall be placed, with the engine shut off, in the evaporative emission enclosure.

5.1.6.2. The evaporative emission canister shall be prepared for the canister loading operation. The canister shall not be removed from the vehicle, unless access to it in its normal location is so restricted that loading can only reasonably be accomplished by removing the canister from the vehicle. Special care shall be taken during this step to avoid damage to the components and the integrity of the fuel system.

5.1.6.3. The canister is loaded with a mixture composed of 50 per cent butane and 50 per cent nitrogen by volume at a rate of 40 grams butane per hour.

5.1.6.4. As soon as the canister reaches breakthrough, the vapour source shall be shut off.

5.1.6.5. The evaporative emission canister shall then be reconnected and the vehicle restored to its normal operating condition.

5.1.7. Fuel drain and refill

5.1.7.1. The fuel tank(s) of the vehicle(s) is (are) emptied using the fuel tank drain(s). This shall be done so as not to abnormally purge or abnormally load the evaporative control devices fitted to the vehicle. Removal of the fuel cap is normally sufficient to achieve this.

5.1.7.2. The fuel tank(s) is (are) refilled with test fuel at a temperature of between 291 8 K (18 8 °C) to 40 +2 per cent of the tank's normal volumetric capacity. The fuel cap(s) of the vehicle shall be fitted at this point.

5.2. Preconditioning drive

5.2.1. Within one hour from the completing of canister loading in accordance with paragraphs 5.1.5. or 5.1.6. the vehicle is placed on the chassis dynamometer and driven through one Part One and two Part Two driving cycles of Type I Test as specified in Annex 4a. Exhaust emissions are not sampled during this operation.

5.3. Soak

5.3.1. Within five minutes of completing the preconditioning operation specified in paragraph 5.2.1. above the engine bonnet shall be completely closed and the vehicle driven off the chassis dynamometer and parked in the soak area. The vehicle is parked for a minimum of 12 hours and a maximum of 36 hours. The engine oil and coolant temperatures shall have reached the temperature of the area or within 3 K of it at the end of the period.

5.4. Dynamometer test

5.4.1. After conclusion of the soak period the vehicle is driven through a complete Type I Test drive as described in Annex 4a (cold start urban and extra urban test). Then the engine is shut off. Exhaust emissions may be sampled during this operation but the results shall not be used for the purpose of exhaust emission type approval.

5.4.2. Within two minutes of completing the Type I Test drive specified in paragraph 5.4.1. above the vehicle is driven a further conditioning drive consisting of one urban test cycle (hot start) of a Type I Test. Then the engine is shut off again. Exhaust emissions need not be sampled during this operation.

5.5. Hot soak evaporative emissions test

5.5.1. Before the completion of the test run the measuring chamber shall be purged for several minutes until a stable hydrocarbon background is obtained. The enclosure mixing fan(s) shall also be turned on at this time.

5.5.2. The hydrocarbon analyser shall be zeroed and spanned immediately prior to the test.

5.5.3. At the end of the driving cycle the engine bonnet shall be completely closed and all connections between the vehicle and the test stand disconnected. The vehicle is then driven to the measuring chamber with a minimum use of the accelerator pedal. The engine shall be turned off before any part of the vehicle enters the measuring chamber. The time at which the engine is switched off is recorded on the evaporative emission measurement data recording system and temperature recording begins. The vehicle's windows and luggage compartments shall be opened at this stage, if not already opened.

5.5.4. The vehicle shall be pushed or otherwise moved into the measuring chamber with the engine switched off.

5.5.5. The enclosure doors are closed and sealed gas-tight within two minutes of the engine being switched off and within seven minutes of the end of the conditioning drive.

5.5.6. The start of a 60 0.5 minute hot soak period begins when the chamber is sealed. The hydrocarbon concentration, temperature and barometric pressure are measured to give the initial readings CHCi, Pi and Ti for the hot soak test. These figures are used in the evaporative emission calculation, paragraph 6. below. The ambient temperature T of the enclosure shall not be less than 296 K and no more than 304 K during the 60-minute hot soak period.

5.5.7. The hydrocarbon analyser shall be zeroed and spanned immediately before the end of the 60 0.5 minute test period.

5.5.8. At the end of the 60 0.5 minute test period, the hydrocarbon concentration in the chamber shall be measured. The temperature and the barometric pressure are also measured. These are the final readings CHCf, Pf and Tf for the hot soak test used for the calculation in paragraph 6. below.

5.6. Soak

5.6.1. The test vehicle shall be pushed or otherwise moved to the soak area without use of the engine and soaked for not less than 6 hours and not more than 36 hours between the end of the hot soak test and the start of the diurnal emission test. For at least 6 hours of this period the vehicle shall be soaked at 293 2 K (20 2 °C).

5.7. Diurnal test

5.7.1. The test vehicle shall be exposed to one cycle of ambient temperature according to the profile specified in Appendix 2 to this annex with a maximum deviation of 2 K at any time. The average temperature deviation from the profile, calculated using the absolute value of each measured deviation, shall not exceed 1 K. Ambient temperature shall be measured at least every minute. Temperature cycling begins when time Tstart = 0, as specified in paragraph 5.7.6. below.

5.7.2. The measuring chamber shall be purged for several minutes immediately before the test until a stable background is obtainable. The chamber mixing fan(s) shall also be switched on at this time.

5.7.3. The test vehicle, with the engine shut off and the test vehicle windows and luggage compartment(s) opened shall be moved into the measuring chamber. The mixing fan(s) shall be adjusted in such a way as to maintain a minimum air circulation speed of 8 km/h under the fuel tank of the test vehicle.

5.7.4. The hydrocarbon analyser shall be zeroed and spanned immediately before the test.

5.7.5. The enclosure doors shall be closed and gas-tight sealed.

5.7.6. Within 10 minutes of closing and sealing the doors, the hydrocarbon concentration, temperature and barometric pressure are measured to give the initial readings CHCi, Pi and Ti for the diurnal test. This is the point where time Tstart = 0.

5.7.7. The hydrocarbon analyser shall be zeroed and spanned immediately before the end of the test.

5.7.8. The end of the emission sampling period occurs 24 hours 6 minutes after the beginning of the initial sampling, as specified in paragraph 5.7.6. above. The time elapsed is recorded. The hydrocarbon concentration, temperature and barometric pressure are measured to give the final readings CHCf, Pf and Tf for the diurnal test used for the calculation in paragraph 6. This completes the evaporative emission test procedure.

6. Calculation

6.1. The evaporative emission tests described in paragraph 5. allow the hydrocarbon emissions from the diurnal and hot soak phases to be calculated. Evaporative losses from each of theses phases is calculated using the initial and final hydrocarbon concentrations, temperatures and pressures in the enclosure, together with the net enclosure volume. The formula below is used:

Where:
MHC	=	hydrocarbon mass in grams,
MHC,out	=	mass of hydrocarbon exiting the enclosure, in the case of fixed-volume enclosures for diurnal emission testing (grams),
MHC,i	=	mass of hydrocarbon entering the enclosure, in the case of fixed-volume enclosures for diurnal emission testing (grams),
CHC	=	measured hydrocarbon concentration in the enclosure (ppm volume in C1 equivalent),
V	=	net enclosure volume in cubic metres corrected for the volume of the vehicle, with the windows and the luggage compartment open. If the volume of the vehicle is not determined a volume of 1.42 m3 is subtracted,
T	=	ambient chamber temperature, in K,
P	=	barometric pressure in kPa,
H/C	=	hydrogen to carbon ratio,
k	=	1.2  (12 + H/C);

Where:
i	=	is the initial reading,
f	=	is the final reading,
H/C	=	is taken to be 2.33 for diurnal test losses,
H/C	=	is taken to be 2.20 for hot soak losses.

6.2. Overall results of test

The overall hydrocarbon mass emission for the vehicle is taken to be:

Mtotal = MDI + MHS

Where:
Mtotal	=	overall mass emissions of the vehicle (grams),
MDI	=	hydrocarbon mass emission for diurnal test (grams),
MHS	=	hydrocarbon mass emission for the hot soak (grams).

Annex 7 - Appendix 1

Calibration of equipment for evaporative emission testing

1. Calibration frequency and methods

1.1. All equipment shall be calibrated before its initial use and then calibrated as often as necessary and in any case in the month before type approval testing. The calibration methods to be used are described in this appendix.

1.2. Normally the series of temperatures which are mentioned first shall be used. The series of temperatures within square brackets may alternatively be used.

2. Calibration of the enclosure

2.1. Initial determination of internal volume of the enclosure

2.1.1. Before its initial use, the internal volume of the chamber shall be determined as follows:

The internal dimensions of the chamber are carefully measured, allowing for any irregularities such as bracing struts. The internal volume of the chamber is determined from these measurements.

For variable-volume enclosures, the enclosure shall be latched to a fixed volume when the enclosure is held at an ambient temperature of 303 K (30 °C) [(302 K (29 °C)]. This nominal volume shall be repeatable within 0.5 per cent of the reported value.

2.1.2. The net internal volume is determined by subtracting 1.42 m3 from the internal volume of the chamber. Alternatively the volume of the test vehicle with the luggage compartment and windows open may be used instead of the 1.42 m3.

2.1.3. The chamber shall be checked as in paragraph 2.3. below. If the propane mass does not correspond to the injected mass to within 2 per cent, then corrective action is required.

2.2. Determination of chamber background emissions

This operation determines that the chamber does not contain any materials that emit significant amounts of hydrocarbons. The check shall be carried out at the enclosure's introduction to service, after any operations in the enclosure which may affect background emissions and at a frequency of at least once per year.

2.2.1. Variable-volume enclosures may be operated in either latched or unlatched volume configuration, as described in paragraph 2.1.1. above, ambient temperatures shall be maintained at 308 K 2 K. (35 2 °C) [309 K 2 K (36 2 °C)], throughout the 4-hour period mentioned below.

2.2.2. Fixed volume enclosures shall be operated with the inlet and outlet flow streams closed. Ambient temperatures shall be maintained at 308 K 2 K
(35 2 °C) [309 K 2 K (36 2 °C) throughout the 4-hour period mentioned below.

2.2.3. The enclosure may be sealed and the mixing fan operated for a period of up to 12 hours before the 4-hour background sampling period begins.

2.2.4. The analyser (if required) shall be calibrated, then zeroed and spanned.

2.2.5. The enclosure shall be purged until a stable hydrocarbon reading is obtained, and the mixing fan turned on if not already on.

2.2.6. The chamber is then sealed and the background hydrocarbon concentration, temperature and barometric pressure are measured. These are the initial readings CHCi, Pi, Ti used in the enclosure background calculation.

2.2.7. The enclosure is allowed to stand undisturbed with the mixing fan on for a period of four hours.

2.2.8. At the end of this time the same analyser is used to measure the hydrocarbon concentration in the chamber. The temperature and the barometric pressure are also measured. These are the final readings CHCf, Pf, Tf.

2.2.9. The change in mass of hydrocarbons in the enclosure shall be calculated over the time of the test in accordance with paragraph 2.4. below and shall not exceed 0.05 g.

2.3. Calibration and hydrocarbon retention test of the chamber

The calibration and hydrocarbon retention test in the chamber provides a check on the calculated volume in paragraph 2.1. above and also measures any leak rate. The enclosure leak rate shall be determined at the enclosure's introduction to service, after any operations in the enclosure which may affect the integrity of the enclosure, and at least monthly thereafter. If six consecutive monthly retention checks are successfully completed without corrective action, the enclosure leak rate may be determined quarterly thereafter as long as no corrective action is required.

2.3.1. The enclosure shall be purged until a stable hydrocarbon concentration is reached. The mixing fan is turned on, if not already switched on. The hydrocarbon analyser is zeroed, calibrated if required, and spanned.

2.3.2. On variable-volume enclosures, the enclosure shall be latched to the nominal volume position. On fixed-volume enclosures the outlet and inlet flow streams shall be closed.

2.3.3. The ambient temperature control system is then turned on (if not already on) and adjusted for an initial temperature of 308 K (35 °C) [309 K (36 °C)].

2.3.4. When the enclosure stabilises at 308 K 2 K (35 2 °C) [309 K 2 K (36 2 °C)], the enclosure is sealed and the background concentration, temperature and barometric pressure measured. These are the initial readings CHCi, Pi, Ti used in the enclosure calibration.

2.3.5. A quantity of approximately 4 grams of propane is injected into the enclosure. The mass of propane shall be measured to an accuracy and precision of 2 per cent of the measured value.

2.3.6. The contents of the chamber shall be allowed to mix for five minutes and then the hydrocarbon concentration, temperature and barometric pressure are measured. These are the readings CHCf, Pf, Tf for the calibration of the enclosure as well as the initial readings CHCi, Pi, Ti for the retention check.

2.3.7. Based on the readings taken according to paragraphs 2.3.4. and 2.3.6. above and the formula in paragraph 2.4. below, the mass of propane in the enclosure is calculated. This shall be within ±2 per cent of the mass of propane measured in paragraph 2.3.5. above.

2.3.8. For variable-volume enclosures the enclosure shall be unlatched from the nominal volume configuration. For fixed-volume enclosures, the outlet and inlet flow streams shall be opened.

2.3.9. The process is then begun of cycling the ambient temperature from 308 K (35 °C) to 293 K (20 °C) and back to 308 K (35 °C) [308.6 K (35.6 °C) to 295.2 K (22.2 °C) and back to 308.6 K (35.6 °C)] over a 24-hour period according to the profile [alternative profile] specified in Appendix 2 to this annex within 15 minutes of sealing the enclosure. (Tolerances as specified in paragraph 5.7.1. of Annex 7).

2.3.10. At the completion of the 24-hour cycling period, the final hydrocarbon concentration, temperature and barometric pressure are measured and recorded. These are the final readings CHCf, Pf, Tf for the hydrocarbon retention check.

2.3.11. Using the formula in paragraph 2.4. below, the hydrocarbon mass is then calculated from the readings taken in paragraphs 2.3.10. and 2.3.6. above. The mass may not differ by more than 3 per cent from the hydrocarbon mass given in paragraph 2.3.7. above.

2.4. Calculations

The calculation of net hydrocarbon mass change within the enclosure is used to determine the chamber's hydrocarbon background and leak rate. Initial and final readings of hydrocarbon concentration, temperature and barometric pressure are used in the following formula to calculate the mass change.

Where:
MHC	=	hydrocarbon mass in grams,
MHC,out	=	mass of hydrocarbons exiting the enclosure, in the case of fixed-volume enclosures for diurnal emission testing (grams),
MHC,i	=	mass of hydrocarbons entering the enclosure when a fixed-volume enclosure is used for testing diurnal emissions (grams),
CHC	=	hydrocarbon concentration in the enclosure (ppm carbon (Note: ppm carbon = ppm propane x 3)),
V	=	enclosure volume in cubic metres,
T	=	ambient temperature in the enclosure, (K),
P	=	barometric pressure, (kPa),
K	=	17.6;

Where:
i		is the initial reading,
f		is the final reading.

3. Checking of FID hydrocarbon analyzer

3.1. Detector response optimisation

The FID shall be adjusted as specified by the instrument manufacturer. Propane in air should be used to optimise the response on the most common operating range.

3.2. Calibration of the HC analyser

The analyser should be calibrated using propane in air and purified synthetic air. See paragraph 3.2. of Appendix 3 of Annex 4a.

Establish a calibration curve as described in paragraphs 4.1. to 4.5. of this appendix.

3.3. Oxygen interference check and recommended limits

The response factor (Rf) for a particular hydrocarbon species is the ratio of the FID C1 reading to the gas cylinder concentration, expressed as ppm C1. The concentration of the test gas shall be at a level to give a response of approximately 80 per cent of full-scale deflection, for the operating range. The concentration shall be known, to an accuracy of 2 per cent in reference to a gravimetric standard expressed in volume. In addition the gas cylinder shall be preconditioned for 24 hours at a temperature between 293 K and 303 K (20 and 30 °C).

Response factors should be determined when introducing an analyser into service and thereafter at major service intervals. The reference gas to be used is propane with balance purified air which is taken to give a response factor of 1.00.

The test gas to be used for oxygen interference and the recommended response factor range are given below:

Propane and nitrogen: 0.95  Rf  1.05.

4. Calibration of the hydrocarbon analyzer

Each of the normally used operating ranges are calibrated by the following procedure:

4.1. Establish the calibration curve by at least five calibration points spaced as evenly as possible over the operating range. The nominal concentration of the calibration gas with the highest concentrations to be at least 80 per cent of the full scale.

4.2. Calculate the calibration curve by the method of least squares. If the resulting polynomial degree is greater than 3, then the number of calibration points shall be at least the number of the polynomial degree plus 2.

4.3. The calibration curve shall not differ by more than 2 per cent from the nominal value of each calibration gas.

4.4. Using the coefficients of the polynomial derived from paragraph 3.2. above, a table of indicated reading against true concentration shall be drawn up in steps of no greater than 1 per cent of full scale. This is to be carried out for each analyser range calibrated. The table shall also contain other relevant data such as:

(a) Date of calibration, span and zero potentiometer readings (where applicable);

(b) Nominal scale;

(d) The actual and indicated value of each calibration gas used together with the percentage differences;

(e) FID fuel and type;

(f) FID air pressure.

4.5. If it can be shown to the satisfaction of the technical service that alternative technology (e.g. computer, electronically controlled range switch) can give equivalent accuracy, then those alternatives may be used.

Annex 8

Type VI Test

(Verifying the average exhaust emissions of carbon monoxide and hydrocarbons after a cold start at low ambient temperature)

1. Introduction

This annex applies only to vehicles with positive-ignition engines. It describes the equipment required and the procedure for the Type VI Test defined in paragraph 5.3.5 of this Regulation in order to verify the emissions of carbon monoxide and hydrocarbons at low ambient temperatures. Topics addressed in this Regulation include:

(i) Equipment requirements;

(ii) Test conditions;

(iii) Test procedures and data requirements.

2. Test equipment

2.1. Summary

2.1.1. This chapter deals with the equipment needed for low ambient temperature exhaust emission tests of positive-ignition engined vehicles. Equipment required and specifications are equivalent to the requirements for the Type I Test as specified Annex 4a, with appendices, if specific requirements for the Type VI Test are not prescribed. Paragraphs 2.2. to 2.6. describe deviations applicable to Type VI low ambient temperature testing.

2.2. Chassis dynamometer

2.2.1. The requirements of Appendix 1 of Annex 4a apply. The dynamometer shall be adjusted to simulate the operation of a vehicle on the road at 266 K
(-7 °C). Such adjustment may be based on a determination of the road load force profile at 266 K (-7 °C). Alternatively the driving resistance determined according to Appendix 7 of Annex 4a may be adjusted for a 10 per cent decrease of the coast-down time. The technical service may approve the use of other methods of determining the driving resistance.

2.2.2. For calibration of the dynamometer the provisions of Appendix 1 of Annex 4a apply.

2.3. Sampling system

2.3.1. The provisions of Appendix 2 and Appendix 3 of Annex 4a apply.

2.4. Analytical equipment

2.4.1. The provisions of Appendix 3 of Annex 4a apply, but only for carbon monoxide, carbon dioxide, and total hydrocarbon testing.

2.4.2. For calibrations of the analytical equipment the provisions of of Annex 4a apply.

2.5. Gases

2.5.1. The provisions of paragraph 3. of Appendix 3 of Annex 4a apply, where they are relevant.

2.6. Additional equipment

2.6.1. For equipment used for the measurement of volume, temperature, pressure and humidity the provisions in paragraph 4.6. of Annex 4a apply.

3. Test sequence and fuel

3.1. General requirements

3.1.1. The test sequence in Figure 8/1 shows the steps encountered as the test vehicle undergoes the procedures for the Type VI Test. Ambient temperature levels encountered by the test vehicle shall average: 266 K (-7 °C) 3 K and shall not be less than 260 K (-13 °C), or more than 272 K (-1 °C).

The temperature may not fall below 263 K (-10 °C), or exceed 269 K (-4 °C) for more than three consecutive minutes.

3.1.2. The test cell temperature monitored during testing shall be measured at the output of the cooling fan (paragraph 5.2.1. of this annex). The ambient temperature reported shall be an arithmetic average of the test cell temperatures measured at constant intervals no more than one minute apart.

3.2. Test procedure

The Part One urban driving cycle according to Figure 1 in Annex 4a, consists of four elementary urban cycles which together make a complete Part One cycle.

3.2.1. Start of engine, start of the sampling and the operation of the first cycle shall be in accordance with Table 1 and Figure 1 in Annex 4a.

3.3. Preparation for the test

3.3.1. For the test vehicle the provisions of paragraph 3.2. of Annex 4a apply. For setting the equivalent inertia mass on the dynamometer the provisions of paragraph 6.2.1. of Annex 4a apply.

Figure 8/1
Procedure for low ambient temperature test

3.4. Test fuel

3.4.1. The test fuel must comply with the specifications given in paragraph 2. of Annex 10.

4. Vehicle preconditioning

4.1. Summary

4.1.1. To ensure reproducible emission tests, the test vehicles shall be conditioned in a uniform manner. The conditioning consists of a preparatory drive on a chassis dynamometer followed by a soak period before the emission test according to paragraph 4.3.

4.2. Preconditioning

4.2.1. The fuel tank(s) shall be filled with the specified test fuel. If the existing fuel in the fuel tank(s) does not meet the specifications contained in paragraph 3.4.1. above, the existing fuel shall be drained prior to the fuel fill. The test fuel shall be at a temperature less than or equal to 289 K (+16 °C). For the above operations the evaporative emission control system shall neither be abnormally purged nor abnormally loaded.

4.2.2. The vehicle is moved to the test cell and placed on the chassis dynamometer.

4.2.3. The preconditioning consists of one complete driving cycle, Parts One and Two, according to Tables 1 and 2 and Figure 1 of Annex 4a. At the request of the manufacturer, vehicles with a positive-ignition engine may be preconditioned with one Part One and two Part Two driving cycles.

4.2.4. During the preconditioning the test cell temperature shall remain relatively constant and not be higher than 303 K (30 °C)

4.2.5. The drive-wheel tyre pressure shall be set in accordance with the provisions of paragraph 6.2.3. of Annex 4a.

4.2.6. Within ten minutes of completion of the preconditioning, the engine shall be switched off.

4.2.7. If requested by the manufacturer and approved by the technical service, additional preconditioning may in exceptional cases be allowed. The technical service may also choose to conduct additional preconditioning. The additional preconditioning consists of one or more driving schedules of the Part One cycle as described in Table 1 and Figure 1 of Annex 4a. The extent of such additional preconditioning shall be recorded in the test report.

4.3. Soak methods

4.3.1. One of the following two methods, to be selected by the manufacturer, shall be utilised to stabilise the vehicle before the emission test.

4.3.2. Standard method

The vehicle is stored for not less than 12 hours nor for more than 36 hours prior to the low ambient temperature exhaust emission test. The ambient temperature (dry bulb) during this period shall be maintained at an average temperature of:

266 K (-7 °C) 3 K during each hour of this period and shall not be less than 260 K (-13 °C) nor more than 272 K (-1 °C). In addition, the temperature may not fall below 263 K (-10 °C) nor more than 269 K (-4 °C) for more than three consecutive minutes.

4.3.3. Forced method

The vehicle shall be stored for not more than 36 hours prior to the low ambient temperature exhaust emission test.

4.3.3.1. The vehicle shall not be stored at ambient temperatures which exceed 303 K (30 °C) during this period.

4.3.3.2. Vehicle cooling may be accomplished by force-cooling the vehicle to the test temperature. If cooling is augmented by fans, the fans shall be placed in a vertical position so that the maximum cooling of the drive train and engine is achieved and not primarily the sump. Fans shall not be placed under the vehicle.

4.3.3.3. The ambient temperature need only be stringently controlled after the vehicle has been cooled to 266 K (-7 °C) 2 K, as determined by a representative bulk oil temperature.

A representative bulk oil temperature is the temperature of the oil measured near the middle of the oil sump, not at the surface or at the bottom of the oil sump. If two or more diverse locations in the oil are monitored, they shall all meet the temperature requirements.

4.3.3.4. The vehicle shall be stored for at least one hour after is has been cooled to 266 K (-7 °C) 2 K, prior to the low ambient temperature exhaust emission test. The ambient temperature (dry bulb) during this period shall average 266 K (-7 °C) 3 K, and shall not be less than 260 K (-13 °C) or more than 272 K (-1 °C),

In addition, the temperature may not fall below 263 K (-10 °C) or exceed 269 K (-4 °C), for more than three consecutive minutes.

4.3.4. If the vehicle is stabilised at 266 K (-7 °C), in a separate area and is moved through a warm area to the test cell, the vehicle shall be destabilised in the test cell for at least six times the period the vehicle is exposed to warmer temperatures. The ambient temperature (dry bulb) during this period shall average 266 K (-7 °C) 3 K and shall not be less than 260 K (-13 °C) nor more than 272 K (-1 °C).

In addition, the temperature may not fall below 263 K (-10 °C) or exceed 269 K (-4 °C), for more than three consecutive minutes.

5. Dynamometer procedure

5.1. Summary

5.1.1. The emission sampling is performed over a test procedure consisting of the Part One cycle ( Annex 4a, Table 1 and Figure 1). Engine start-up, immediate sampling, operation over the Part One cycle and engine shut-down make a complete low ambient temperature test, with a total test time of 780 seconds. The exhaust emissions are diluted with ambient air and a continuously proportional sample is collected for analysis. The exhaust gases collected in the bag are analysed for hydrocarbons, carbon monoxide, and carbon dioxide. A parallel sample of the dilution air is similarly analysed for carbon monoxide, total hydrocarbons and carbon dioxide.

5.2. Dynamometer operation

5.2.1. Cooling fan

5.2.1.1. A cooling fan is positioned so that cooling air is appropriately directed to the radiator (water cooling) or to the air intake (air-cooling) and to the vehicle.

5.2.1.2. For front-engined vehicles, the fan shall be positioned in front of the vehicle, within 300 mm of it. In the case of rear-engined vehicles or if the above arrangement is impractical, the cooling fan shall be positioned so that sufficient air is supplied to cool the vehicle.

5.2.1.3. The fan speed shall be such that, within the operating range of 10 km/h to at least 50 km/h, the linear velocity of the air at the blower outlet is within 5 km/h of the corresponding roller speed. The final selection of the blower shall have the following characteristics:

(i) Area: at least 0.2 m2;

(ii) Height of the lower edge above ground: approximately 20 cm.

As an alternative the blower linear air speed shall be at least 6 m/s (21.6 km/h). At the request of the manufacturer, for special vehicles (e.g. vans, off-road) the height of the cooling fan may be modified.

5.2.1.4. The vehicle speed as measured from the dynamometer roll(s) shall be used (paragraph 1.2.6. of Appendix 1 of Annex 4a).

5.2.3. Preliminary testing cycles may be carried out if necessary, to determine how best to actuate the accelerator and brake controls so as to achieve a cycle approximating to the theoretical cycle within the prescribed limits, or to permit sampling system adjustment. Such driving shall be carried out before "START" according to Figure 8/1.

5.2.4. Humidity in the air shall be kept low enough to prevent condensation on the dynamometer roll(s).

5.2.5. The dynamometer shall be thoroughly warmed as recommended by the dynamometer manufacturer, and using procedures or control methods that assure stability of the residual frictional power.

5.2.6. The time between dynamometer warming and the start of the emission test shall be no longer than 10 minutes if the dynamometer bearings are not independently heated. If the dynamometer bearings are independently heated, the emission test shall begin no longer than 20 minutes after dynamometer warming.

5.2.7. If the dynamometer power is to be adjusted manually, it shall be set within one hour prior to the exhaust emission test phase. The test vehicle may not be used to make the adjustment. The dynamometer, using automatic control of pre-selectable power settings, may be set at any time prior to the beginning of the emission test.

5.2.8. Before the emission test driving schedule may begin, the test cell temperature shall be 266 K (-7 °C) 2 K, as measured in the air stream of the cooling fan with a maximum distance of 1.5 m from the vehicle.

5.2.9. During operation of the vehicle the heating and defrosting devices shall be shut off.

5.2.10. The total driving distance or roller revolutions measured are recorded.

5.2.11. A four-wheel drive vehicle shall be tested in a two-wheel drive mode of operation. The determination of the total road force for dynamometer setting is performed while operating the vehicle in its primary designed driving mode.

5.3. Performing the test

5.3.1. The provisions of paragraph 6.4., excluding 6.4.1.2., of Annex 4a apply in respect of starting the engine, carrying out the test and taking the emission samples. The sampling begins before or at the initiation of the engine start-up procedure and ends on conclusion of the final idling period of the last elementary cycle of the Part One (urban driving cycle), after 780 seconds.

The first driving cycle starts with a period of 11 seconds idling as soon as the engine has started.

5.3.2. For the analysis of the sampled emissions the provisions of paragraph 6.5., excluding paragraph 6.5.2., of Annex 4a apply. In performing the exhaust sample analysis the technical service shall exercise care to prevent condensation of water vapour in the exhaust gas sampling bags.

5.3.3. For the calculations of the mass emissions the provisions of paragraph 6.6. of Annex 4a apply.

6. Other requirements

6.1. Irrational emission control strategy

6.1.1. Any irrational emission control strategy which results in a reduction in effectiveness of the emission control system under normal operating conditions at low temperature driving, so far as not covered by the standardised emission tests, may be considered a defeat device.

Annex 9

Type V Test

(Description of the endurance test for verifying the durability of pollution control devices)

1. Introduction

1.1. This annex described the test for verifying the durability of anti-pollution devices equipping vehicles with positive-ignition or compression-ignition engines. The durability requirements shall be demonstrated using one of the three options set out in paragraphs 1.2, 1.3. and 1.4.

1.2. The whole vehicle durability test represents an ageing test of 160,000 km. This test is to be performed driven on a test track, on the road, or on a chassis dynamometer.

1.3. The manufacturer may choose to use a bench ageing durability test.

1.4. As an alternative to durability testing, a manufacturer may choose to apply the assigned deterioration factors from the table in paragraph 5.3.6.2. of this Regulation.

1.5. At the request of the manufacturer, the technical service may carry out the Type I Test before the whole vehicle or bench ageing durability test has been completed using the assigned deterioration factors in the table in paragraph 5.3.6.2. of this Regulation. On completion of the whole vehicle or bench ageing durability test, the technical service may then amend the type approval results recorded in Annex 2 of this Regulation by replacing the assigned deterioration factors in the above table with those measured in the whole vehicle or bench ageing durability test.

1.6. Deterioration factors are determined using either the procedures set out in paragraphs 1.2. and 1.3. or using the assigned values in the table referred in paragaph 1.4. The deterioration factors are used to establish compliance with the requirements of the appropriate emissions limits set out in Table 1 in paragraph 5.3.1.4. of this Regulation during the useful life of the vehicle.

2. Technical requirements

2.1. As an alternative to the operating cycle described in paragraph 6.1. for the whole vehicle durability test, the vehicle manufacturer may use Standard Road Cycle (SRC) described in Appendix 3 of this annex. This test cycle shall be conducted until the vehicle has covered a minimum of 160,000 km.

2.2. Bench Ageing Durability Test

2.2.1. In addition to the technical requirements for the bench ageing test set out in paragraph 1.3., the technical requirements set out in this section shall apply.

2.3. The fuel to be used during the test shall be the one specified in paragraph 4.

2.3.1. Vehicles with Positive Ignition Engines

2.3.1.1. The following bench ageing procedure shall be applicable for positive-ignition vehicles including hybrid vehicles which use a catalyst as the principle after-treatment emission control device.

The bench ageing procedure requires the installation of the catalyst-plus-oxygen sensor system on a catalyst ageing bench.

Ageing on the bench shall be conducted by following the standard bench cycle (SBC) for the period of time calculated from the bench ageing time (BAT) equation. The BAT equation requires, as input, catalyst time-at-temperature data measured on the Standard Road Cycle (SRC), described in Appendix 3 of this annex.

2.3.1.2. Standard bench cycle (SBC). Standard catalyst bench ageing shall be conducted following the SBC. The SBC shall be run for the period of time calculated from the BAT equation. The SBC is described in Appendix 1 of this annex.

2.3.1.3. Catalyst time-at-temperature data. Catalyst temperature shall be measured during at least two full cycles of the SRC cycle as described in Appendix 3 of this annex.

Catalyst temperature shall be measured at the highest temperature location in the hottest catalyst on the test vehicle. Alternatively, the temperature may be measured at another location providing that it is adjusted to represent the temperature measured at the hottest location using good engineering judgement.

Catalyst temperature shall be measured at a minimum rate of one hertz (one measurement per second).

The measured catalyst temperature results shall be tabulated into a histogram with temperature groups of no larger than 25 °C.

2.3.1.4. Bench-ageing time. Bench ageing time shall be calculated using the bench ageing time (BAT) equation as follows:

te for a temperature bin = th e((R/Tr)-(R/Tv))

Total te = Sum of te over all the temperature groups

Bench-Ageing Time = A (Total te)

Where:
A	= 1.1	This value adjusts the catalyst ageing time to account for deterioration from sources other than thermal ageing of the catalyst.
R	=	Catalyst thermal reactivity =17,500
th	=	The time (in hours) measured within the prescribed temperature bin of the vehicle's catalyst temperature histogram adjusted to a full useful life basis e.g., if the histogram represented 400 km, and useful life is 160,000 km; all histogram time entries would be multiplied by 400 (160,000/400).
Total te	=	The equivalent time (in hours) to age the catalyst at the temperature of Tr on the catalyst ageing bench using the catalyst ageing cycle to produce the same amount of deterioration experienced by the catalyst due to thermal deactivation over the 160,000 km.

te for a bin	=	The equivalent time (in hours) to age the catalyst at the temperature of Tr on the catalyst ageing bench using the catalyst ageing cycle to produce the same amount of deterioration experienced by the catalyst due to thermal deactivation at the temperature bin of Tv over 160,000 km.
Tr	=	The effective reference temperature (in K) of the catalyst on the catalyst bench run on the bench ageing cycle. The effective temperature is the constant temperature that would result in the same amount of ageing as the various temperatures experienced during the bench ageing cycle.
Tv	=	The mid-point temperature (in K) of the temperature bin of the vehicle on-road catalyst temperature histogram.

2.3.1.5. Effective reference temperature on the SBC. The effective reference temperature of the standard bench cycle (SBC) shall be determined for the actual catalyst system design and actual ageing bench which will be used using the following procedures:

(a) Measure time-at-temperature data in the catalyst system on the catalyst ageing bench following the SBC. Catalyst temperature shall be measured at the highest temperature location of the hottest catalyst in the system. Alternatively, the temperature may be measured at another location providing that it is adjusted to represent the temperature measured at the hottest location.

Catalyst temperature shall be measured at a minimum rate of one hertz (one measurement per second) during at least 20 minutes of bench ageing. The measured catalyst temperature results shall be tabulated into a histogram with temperature groups of no larger than 10 °C.

(b) The BAT equation shall be used to calculate the effective reference temperature by iterative changes to the reference temperature (Tr) until the calculated ageing time equals or exceeds the actual time represented in the catalyst temperature histogram. The resulting temperature is the effective reference temperature on the SBC for that catalyst system and ageing bench.

2.3.1.6. Catalyst Ageing Bench. The catalyst ageing bench shall follow the SBC and deliver the appropriate exhaust flow, exhaust constituents, and exhaust temperature at the face of the catalyst.

All bench ageing equipment and procedures shall record appropriate information (such as measured A/F ratios and time-at-temperature in the catalyst) to assure that sufficient ageing has actually occurred.

2.3.1.7. Required Testing. For calculating deterioration factors at least two Type I Tests before bench ageing of the emission control hardware and at least two Type I Tests after the bench-aged emission hardware is reinstalled have to be performed on the test vehicle.

Additional testing may be conducted by the manufacturer. Calculation of the deterioration factors has to be done according to the calculation method as specified in paragraph 7 of this annex.

2.3.2. Vehicles with Compression Ignition Engines

2.3.2.1. The following bench ageing procedure is applicable for compression-ignition vehicles including hybrid vehicles.

The bench ageing procedure requires the installation of the after-treatment system on a after-treatment system ageing bench.

Ageing on the bench is conducted by following the standard diesel bench cycle (SDBC) for the number of regenerations/desulphurisation’s calculated from the bench ageing duration (BAD) equation.

2.3.2.2. Standard Diesel Bench Cycle (SDBC). Standard bench ageing is conducted following the SDBC. The SDBC shall be run for the period of time calculated from the bench ageing duration (BAD) equation. The SDBC is described in Appendix 2 of this annex.

2.3.2.3. Regeneration data. Regeneration intervals shall be measured during at least 10 full cycles of the SRC cycle as described in Appendix 3. As an alternative the intervals from the Ki determination may be used.

If applicable, desulphurisation intervals shall also be considered based on manufacturer's data.

2.3.2.4. Diesel bench-ageing duration. Bench ageing duration is calculated using the BAD equation as follows:

Bench-Ageing Duration = number of regeneration and/or desulphurisation cycles (whichever is the longer) equivalent to 160,000 km of driving.

2.3.2.5. Ageing Bench. The ageing bench shall follow the SDBC and deliver appropriate exhaust flow, exhaust constituents, and exhaust temperature to the after-treatment system inlet.

The manufacturer shall record the number of regenerations/desulphurisations (if applicable) to assure that sufficient ageing has actually occurred.

2.3.2.6. Required Testing. For calculating deterioration factors at least two Type I Tests before bench ageing of the emission control hardware and at least two Type I Tests after the bench-aged emission hardware is reinstalled have to be performed. Additional testing may be conducted by the manufacturer. Calculation of the deterioration factors shall be done according to the calculation method set out in paragraph 7. of this Annex and with the additional requirements contained in this Regulation.

3. Test vehicle

3.1. The vehicle shall be in good mechanical order; the engine and the anti-pollution devices shall be new. The vehicle may be the same as that presented for the Type I Test; this Type I Test has to be done after the vehicle has run at least 3,000 km of the ageing cycle of paragraph 6.1. below.

4. Fuel

The durability test is conducted with a suitable commercially available fuel.

5. Vehicle maintenance and adjustments

Maintenance, adjustments as well as the use of the test vehicle's controls shall be those recommended by the manufacturer.

6. Vehicle operation on track, road or on chassis dynamometer

6.1. Operating cycle

During operation on track, road or on roller test bench, the distance shall be covered according to the driving schedule (Figure 9/1) described below:

6.1.1. The durability test schedule is composed of 11 cycles covering 6 kilometres each,

6.1.2. During the first nine cycles, the vehicle is stopped four times in the middle of the cycle, with the engine idling each time for 15 seconds,

6.1.3. Normal acceleration and deceleration,

6.1.4. Five decelerations in the middle of each cycle, dropping from cycle speed to 32 km/h, and the vehicle is gradually accelerated again until cycle speed is attained,

6.1.5. The 10th cycle is carried out at a steady speed of 89 km/h,

6.1.6. The 11th cycle begins with maximum acceleration from stop point up to 113 km/h. At half-way, braking is employed normally until the vehicle comes to a stop. This is followed by an idle period of 15 seconds and a second maximum acceleration.

The schedule is then restarted from the beginning.

The maximum speed of each cycle is given in the following table.

Table 9/1

Maximum speed of each cycle

Cycle	Cycle speed in km/h
1	64
2	48
3	64
4	64
5	56
6	48
7	56
8	72
9	56
10	89
11	113

Figure 9/1
Driving schedule

6.2. The durability test, or if the manufacturer has chosen, the modified durability test shall be conducted until the vehicle has covered a minimum of 160,000 km.

6.3. Test equipment

6.3.1. Chassis dynamometer

6.3.1.1. When the durability test is performed on a chassis dynamometer, the dynamometer shall enable the cycle described in paragraph 6.1. to be carried out. In particular, it shall be equipped with systems simulating inertia and resistance to progress.

6.3.1.2. The brake shall be adjusted in order to absorb the power exerted on the driving wheels at a steady speed of 80 km/h. Methods to be applied to determine this power and to adjust the brake are the same as those described in Appendix 7 of Annex 4a.

6.3.1.3. The vehicle cooling system should enable the vehicle to operate at temperatures similar to those obtained on road (oil, water, exhaust system, etc.).

6.3.1.4. Certain other test bench adjustments and features are deemed to be identical, where necessary, to those described in Annex 4a of this Regulation (inertia, for example, which may be mechanical or electronic).

6.3.1.5. The vehicle may be moved, where necessary, to a different bench in order to conduct emission measurement tests.

6.3.2. Operation on track or road

When the durability test is completed on track or road, the vehicle's reference mass will be at least equal to that retained for tests conducted on a chassis dynamometer.

7. Measuring emissions of pollutants

At the start of the test (0 km), and every 10,000 km (±400 km) or more frequently, at regular intervals until having covered 160,000 km, exhaust emissions are measured in accordance with the Type I Test as defined in paragraph 5.3.1. of this Regulation. The limit values to be complied with are those laid down in paragraph 5.3.1.4. of this Regulation.

In the case of vehicles equipped with periodically regenerating systems as defined in paragraph 2.20. of this Regulation, it shall be checked that the vehicle is not approaching a regeneration period. If this is the case, the vehicle must be driven until the end of the regeneration. If a regeneration occurs during the emissions measurement, a new test (including preconditioning) shall be performed, and the first result not taken into account.

All exhaust emissions results shall be plotted as a function of the running distance on the system rounded to the nearest kilometre and the best fit straight line fitted by the method of least squares shall be drawn through all these data points. This calculation shall not take into account the test results at 0 km.

The data will be acceptable for use in the calculation of the deterioration factor only if the interpolated 6,400 km and 160,000 km points on this line are within the above mentioned limits.

The data are still acceptable when a best fit straight line crosses an applicable limit with a negative slope (the 6,400 km interpolated point is higher than the 160,000 km interpolated point) but the 160,000 km actual data point is below the limit.

A multiplicative exhaust emission deterioration factor shall be calculated for each pollutant as follows:

Where:
Mi1	=	mass emission of the pollutant i in g/km interpolated to 6,400 km,
Mi2	=	mass emission of the pollutant i in g/km interpolated to 160,000 km.

These interpolated values shall be carried out to a minimum of four places to the right of the decimal point before dividing one by the other to determine the deterioration factor. The result shall be rounded to three places to the right of the decimal point.

If a deterioration factor is less than one, it is deemed to be equal to one.

At the request of a manufacturer, an additive exhaust emission deterioration factor shall be calculated for each pollutant as follows:

D . E . F . = Mi2 – Mi1

Annex 9 - Appendix 3

Standard Road Cycle (SRC)

1. Introduction

The standard road cycle (SRC) is a kilometre accumulation cycle. The vehicle may be run on a test track or on a kilometre accumulation dynamometer.

The cycle consists of 7 laps of a 6 km course. The length of the lap may be changed to accommodate the length of the mileage accumulation test track.

Standard Road cycle

Lap	Description		Typical acceleration rate m/s²
1	(start engine) idle 10 seconds		0
1	Moderate acceleration to 48 km/h		1.79
1	Cruise at 48 km/h for ¼ lap		0
1	Moderate deceleration to 32 km/h		-2.23
1	Moderate acceleration to 48 km/h		1.79
1	Cruise at 48 km/h for ¼ lap		0
1	Moderate deceleration to stop		-2.23
1	Idle 5 seconds		0
1	Moderate acceleration to 56 km/h		1.79
1	Cruise at 56 km/h for ¼ lap		0
1	Moderate deceleration to 40 km/h		-2.23
1	Moderate acceleration to 56 km/h		1.79
1	Cruise at 56 km/h for ¼ lap		0
1	Moderate deceleration to stop		-2.23
2	idle 10 seconds		0
2	Moderate acceleration to 64 km/h		1.34
2	Cruise at 64 km/h for ¼ lap		0
2	Moderate deceleration to 48 km/h		-2.23
2	Moderate acceleration to 64 km/h		1.34
2	Cruise at 64 km/h for ¼ lap		0
2	Moderate deceleration to stop		-2.23
2	Idle 5 seconds		0
2	Moderate acceleration to 72 km/h		1.34
2	Cruise at 72 km/h for ¼ lap		0
2	Moderate deceleration to 56 km/h		-2.23
2	Moderate acceleration to 72 km/h		1.34
2	Cruise at 72 km/h for ¼ lap		0
2	Moderate deceleration to stop		-2.23
3		idle 10 seconds	0
3		Hard acceleration to 88 km/h	1.79
3		Cruise at 88 km/h for ¼ lap	0
3		Moderate deceleration to 72 km/h	-2.23
3		Moderate acceleration to 88 km/h	0.89
3		Cruise at 88 km/h for ¼ lap	0
3		Moderate deceleration to 72 km/h	-2.23
3		Moderate acceleration to 97 km/h	0.89
3		Cruise at 97 km/h for ¼ lap	0
3		Moderate deceleration to 80 km/h	-2.23
3		Moderate acceleration to 97 km/h	0.89
3		Cruise at 97 km/h for ¼ lap	0
3		Moderate deceleration to stop	-1.79
4		idle 10 seconds	0
4		Hard acceleration to 129 km/h	1.34
4		Coastdown to 113 km/h	-0.45
4		Cruise at 113 km/h for ½ lap	0
4		Moderate deceleration to 80 km/h	-1.34
4		Moderate acceleration to 105 km/h	0.89
4		Cruise at 105 km/h for ½ lap	0
4		Moderate deceleration to 80 km/h	-1.34
5		Moderate acceleration to 121 km/h	0.45
5		Cruise at 121 km/h for ½ lap	0
5		Moderate deceleration to 80 km/h	-1.34
5		Light acceleration to 113 km/h	0.45
5		Cruise at 113 km/h for ½ lap	0
5		Moderate deceleration to 80 km/h	-1.34
6		Moderate acceleration to 113 km/h	0.89
6		Coastdown to 97 km/h	-0.45
6		Cruise at 97 km/h for ½ lap	0
6		Moderate deceleration to 80 km/h	-1.79
6		Moderate acceleration to 104 km/h	0.45
6		Cruise at 104 km/h for ½ lap	0
6		Moderate deceleration to stop	-1.79
7		idle 45 seconds	0
7		Hard acceleration to 88 km/h	1.79
7		Cruise at 88 km/h for ¼ lap	0
7		Moderate deceleration to 64 km/h	-2.23
7		Moderate acceleration to 88 km/h	0.89
7		Cruise at 88 km/h for ¼ lap	0
7		Moderate deceleration to 64 km/h	-2.23
7		Moderate acceleration to 80 km/h	0.89
7		Cruise at 80 km/h for ¼ lap	0
7		Moderate deceleration to 64 km/h	-2.23
7		Moderate acceleration to 80 km/h	0.89
7		Cruise at 80 km/h for ¼ lap	0
7		Moderate deceleration to stop	-2.23

The standard road cycle is represented graphically in the following figure:

Type: Ethanol (E85)

	Parameter	Unit	Limits1		Test method2
	Parameter	Unit	Minimum	Maximum	Test method2
	Research octane number, RON		95.0	-	EN ISO 5164
	Motor octane number, MON		85.0	-	EN ISO 5163
	Density at 15 °C	kg/m3	Report		ISO 3675
	Vapour pressure	kPa	40.0	60.0	EN ISO 13016-1 (DVPE)
	Sulphur content3, 4	mg/kg	-	10	EN ISO 20846 EN ISO 20884
	Oxidation stability	minutes	360		EN ISO 7536
	Existent gum content (solvent washed)	mg/(100 ml)	-	5	EN-ISO 6246
	Appearance This shall be determined at ambient temperature or 15 °C whichever is higher.		Clear and bright, visibly free of suspended or precipitated contaminants		Visual inspection
	Ethanol and higher alcohols7	% V/V	83	85	EN 1601 EN 13132 EN 14517
Higher alcohols (C3-C8)		% V/V	-	2.0
Methanol		% V/V		0.5
Petrol5		% V/V	Balance		EN 228
Phosphorus		mg/l	0.36		ASTM D 3231
Water content		% V/V		0.3	ASTM E 1064
Inorganic chloride content		mg/l		1	ISO 6227
pHe			6.5	9.0	ASTM D 6423
Copper strip corrosion (3h at 50 °C)		Rating	Class 1		EN ISO 2160
Acidity, (as acetic acid CH3COOH)		% m/m (mg/l)	-	0.005 (40)	ASTM D 1613
	Carbon/hydrogen ratio		report
	Carbon/oxygen ration		report
	1 The values quoted in the specifications are "true values". In establishment of their limit values the terms of ISO 4259 Petroleum products - Determination and application of precision data in relation to methods of test have been applied and in fixing a minimum value, a minimum difference of 2R above zero has been taken into account; in fixing a maximum and minimum value, the minimum difference is 4R (R = reproducibility). Notwithstanding this measure, which is necessary for technical reasons, the manufacturer of fuels shall nevertheless aim at a zero value where the stipulated maximum value is 2R and at the mean value in the case of quotations of maximum and minimum limits. Should it be necessary to clarify whether a fuel meets the requirements of the specifications, the terms of ISO 4259 shall be applied. 2 In cases of dispute, the procedures for resolving the dispute and interpretation of the results based on test method precision, described in EN ISO 4259 shall be used. 3 In cases of national dispute concerning sulphur content, either EN ISO 20846 or EN ISO 20884 shall be called up similar to the reference in the national annex of EN 228. 4 The actual sulphur content of the fuel used for the Type I Test shall be reported. 5 The unleaded petrol content can be determined as 100 minus the sum of the percentage content of water and alcohols. 6 There shall be no intentional addition of compounds containing phosphorus, iron, manganese, or lead to this reference fuel. 7 Ethanol to meet specification of EN 15376 is the only oxygenate that shall be intentionally added to this reference fuel.

1.2. Technical data on the reference fuel to be used for testing vehicles equipped with diesel engine

Type: Diesel fuel (B5)

Parameter	Unit	Limits1		Test method
Parameter	Unit	Minimum	Maximum	Test method
Cetane number2		52.0	54.0	EN-ISO 5165
Density at 15 °C	kg/m3	833	837	EN-ISO 3675
Distillation:
- 50 % point	°C	245	-	EN-ISO 3405
- 95 % point	°C	345	350	EN-ISO 3405
- Final boiling point	°C	-	370	EN-ISO 3405
Flash point	°C	55	-	EN 22719
CFPP	°C	-	- 5	EN 116
Viscosity at 40 °C	mm2/s	2.3	3.3	EN-ISO 3104
Polycyclic aromatic hydrocarbons	% m/m	2.0	6.0	EN 12916
Sulphur content3	mg/kg	-	10	EN ISO 20846 /EN ISO 20884
Copper corrosion		-	Class 1	EN-ISO 2160
Conradson carbon residue (10 % DR)	% m/m	-	0.2	EN-ISO 10370
Ash content	% m/m	-	0.01	EN-ISO 6245
Water content	% m/m	-	0.02	EN-ISO 12937
Neutralisation (strong acid) number	mg KOH/g	-	0.02	ASTM D 974
Oxidation stability4	mg/ml	-	0.025	EN-ISO 12205
Lubricity (HFRR wear scan diameter at 60 °C)	μm	-	400	EN ISO 12156
Oxidation stability at 110 °C4, 6	h	20.0		EN 14112
FAME5	% v/v	4.5	5.5	EN 14078
1 The values quoted in the specifications are "true values". In establishment of their limit values the terms of ISO 4259 Petroleum products – Determination and application of precision data in relation to methods of test have been applied and in fixing a minimum value, a minimum difference of 2R above zero has been taken into account; in fixing a maximum and minimum value, the minimum difference is 4R (R = reproducibility). Notwithstanding this measure, which is necessary for technical reasons, the manufacturer of fuels shall nevertheless aim at a zero value where the stipulated maximum value is 2R and at the mean value in the case of quotations of maximum and minimum limits. Should it be necessary to clarify whether a fuel meets the requirements of the specifications, the terms of ISO 4259 shall be applied. 2 The range for cetane number is not in accordance with the requirements of a minimum range of 4R. However, in the case of a dispute between fuel supplier and fuel user, the terms of ISO 4259 may be used to resolve such disputes provided replicate measurements, of sufficient number to archive the necessary precision, are made in preference to single determinations. 3 The actual sulphur content of the fuel used for the Type I Test shall be reported. 4 Even though oxidation stability is controlled, it is likely that shelf life will be limited. Advice shall be sought from the supplier as to storage conditions and life. 5 FAME content to meet the specification of EN 14214. 6 Oxidation stability can be demonstrated by EN-ISO 12205 or by EN 14112. This requirement shall be reviewed based on CEN/TC19 evaluations of oxidative stability performance and test limits.

2. Specifications of reference fuel to be used for testing vehicles equipped with positive-ignition engines at low ambient temperature – Type VI Test

Type: Petrol (E5)

Parameter	Unit	Limits1		Test method
Parameter	Unit	Minimum	Maximum	Test method
Research octane number, RON		95.0	-	EN 25164 Pr. EN ISO 5164
Motor octane number, MON		85.0	-	EN 25163 Pr. EN ISO 5163
Density at 15 °C	kg/m3	743	756	EN ISO 3675 EN ISO 12185
Vapour pressure	kPa	56.0	95.0	EN ISO 13016-1 (DVPE)
Water content	% v/v		0.015	ASTM E 1064
Distillation:
- Evaporated at 70 °C	% v/v	24.0	44.0	EN-ISO 3405
- Evaporated at 100 °C	% v/v	50.0	60.0	EN-ISO 3405
- Evaporated at 150 °C	% v/v	82.0	90.0	EN-ISO 3405
- Final boiling point	°C	190	210	EN-ISO 3405
Residue	% v/v	-	2.0	EN-ISO 3405
Hydrocarbon analysis:
- Olefins	% v/v	3.0	13.0	ASTM D 1319
- Aromatics	% v/v	29.0	35.0	ASTM D 1319
- Benzene	% v/v	-	1.0	EN 12177
- Saturates	% v/v	Report		ASTM 1319
Carbon/hydrogen ratio		Report
Carbon/oxygen ratio		Report
Induction period2	minutes	480	-	EN-ISO 7536
Oxygen content4	% m/m	Report		EN 1601
Existent gum	mg/ml	-	0.04	EN-ISO 6246
Sulphur content3	mg/kg	-	10	EN ISO 20846 EN ISO 20884
Copper corrosion		-	Class 1	EN-ISO 2160
Lead content	mg/l	-	5	EN 237
Phosphorus content	mg/l	-	1.3	ASTM D 3231
Ethanol5	% v/v	4.7	5.3	EN 1601 EN 13132
1 The values quoted in the specifications are "true values". In establishment of their limit values the terms of ISO 4259 Petroleum products - Determination and application of precision data in relation to methods of test have been applied and in fixing a minimum value, a minimum difference of 2R above zero has been taken into account; in fixing a maximum and minimum value, the minimum difference is 4R (R = reproducibility). Notwithstanding this measure, which is necessary for technical reasons, the manufacturer of fuels shall nevertheless aim at a zero value where the stipulated maximum value is 2R and at the mean value in the case of quotations of maximum and minimum limits. Should it be necessary to clarify whether a fuel meets the requirements of the specifications, the terms of ISO 4259 shall be applied. 2 The fuel may contain oxidation inhibitors and metal deactivators normally used to stabilize refinery gasoline streams, but detergent/dispersive additives and solvent oils shall not be added. 3 The actual sulphur content of the fuel used for the Type I Test shall be reported. 4 Ethanol meeting the specification of pr. EN 15376 is the only oxygenate that shall be intentionally added to the reference fuel. 5 There shall be no intentional addition of compounds containing phosphorus, iron, manganese, or lead to this reference fuel.

Type: Ethanol (E75)

Reference fuel specification to be developed in advance of the dates for setting Type VI Test mandatory to ethanol-fuelled vehicles.

Annex 11

On-board diagnostics (OBD) for motor vehicles

1. Introduction

This annex applies to the functional aspects of on-board diagnostic (OBD) system for the emission control of motor vehicles.

2. Definitions

For the purposes of this annex:

2.1. "OBD" means an on-board diagnostic system for emission control which shall have the capability of identifying the likely area of malfunction by means of fault codes stored in computer memory.

2.2. "Vehicle type" means a category of power-driven vehicles which do not differ in such essential engine and OBD system characteristics.

2.3. "Vehicle family" means a manufacturer's grouping of vehicles which, through their design, are expected to have similar exhaust emission and OBD system characteristics. Each vehicle of this family shall have complied with the requirements of this Regulation as defined in Appendix 2 to this annex.

2.4. "Emission control system" means the electronic engine management controller and any emission-related component in the exhaust or evaporative system which supplies an input to or receives an output from this controller.

2.5. "Malfunction indicator (MI)" means a visible or audible indicator that clearly informs the driver of the vehicle in the event of a malfunction of any emission-related component connected to the OBD system, or the OBD system itself.

2.6. "Malfunction" means the failure of an emission-related component or system that would result in emissions exceeding the limits in paragraph 3.3.2. or if the OBD system is unable to fulfil the basic monitoring requirements of this annex.

2.7. "Secondary air" refers to air introduced into the exhaust system by means of a pump or aspirator valve or other means that is intended to aid in the oxidation of HC and CO contained in the exhaust gas stream.

2.8. "Engine misfire" means lack of combustion in the cylinder of a positive-ignition engine due to absence of spark, poor fuel metering, poor compression or any other cause. In terms of OBD monitoring it is that percentage of misfires out of a total number of firing events (as declared by the manufacturer) that would result in emissions exceeding the limits given in paragraph 3.3.2. or that percentage that could lead to an exhaust catalyst, or catalysts, overheating causing irreversible damage.

2.9. "Type I Test" means the driving cycle (Parts One and Two) used for emission approvals, as detailed in Tables 1 and 2 of Annex 4a.

2.10. A "driving cycle" consists of engine start-up, driving mode where a malfunction would be detected if present, and engine shut-off.

2.11. A "warm-up cycle" means sufficient vehicle operation such that the coolant temperature has risen by a least 22 K from engine starting and reaches a minimum temperature of 343 K (70 °C).

2.12. A "Fuel trim" refers to feedback adjustments to the base fuel schedule. Short-term fuel trim refers to dynamic or instantaneous adjustments. Long-term fuel trim refers to much more gradual adjustments to the fuel calibration schedule than short-term trim adjustments. These long-term adjustments compensate for vehicle differences and gradual changes that occur over time.

2.13. A "Calculated load value" refers to an indication of the current airflow divided by peak airflow, where peak airflow is corrected for altitude, if available. This definition provides a dimensionless number that is not engine specific and provides the service technician with an indication of the proportion of engine capacity that is being used (with wide open throttle as 100 per cent);

2.14. "Permanent emission default mode" refers to a case where the engine management controller permanently switches to a setting that does not require an input from a failed component or system where such a failed component or system would result in an increase in emissions from the vehicle to a level above the limits given in paragraph 3.3.2. of this annex.

2.15. "Power take-off unit" means an engine-driven output provision for the purposes of powering auxiliary, vehicle mounted, equipment.

2.16. "Access" means the availability of all emission-related OBD data including all fault codes required for the inspection, diagnosis, servicing or repair of emissions-related parts of the vehicle, via the serial interface for the standard diagnostic connection (pursuant to Appendix 1 to this annex, paragraph 6.5.3.5.).

2.17. "Unrestricted" means:

2.17.1. Access not dependent on an access code obtainable only from the manufacturer, or a similar device; or

2.17.2. Access allowing evaluation of the data produced without the need for any unique decoding information, unless that information itself is standardised.

2.18. "Standardised" means that all data stream information, including all fault codes used, shall be produced only in accordance with industry standards which, by virtue of the fact that their format and their permitted options are clearly defined, provide for a maximum level of harmonisation in the motor vehicle industry, and whose use is expressly permitted in this Regulation.

2.19. "Repair information" means all information required for diagnosis, servicing, inspection, periodic monitoring or repair of the vehicle and which the manufacturers provide for their authorised dealers/repair shops. Where necessary, such information shall include service handbooks, technical manuals, diagnosis information (e.g. minimum and maximum theoretical values for measurements), wiring diagrams, the software calibration identification number applicable to a vehicle type, instructions for individual and special cases, information provided concerning tools and equipment, data record information and two-directional monitoring and test data. The manufacturer shall not be obliged to make available that information which is covered by intellectual property rights or constitutes specific know-how of manufacturers and/or OEM suppliers; in this case the necessary technical information shall not be improperly withheld.

2.20. "Deficiency" means, in respect of vehicle OBD systems, that up to two separate components or systems that are monitored contain temporary or permanent operating characteristics that impair the otherwise efficient OBD monitoring of those components or systems or do not meet all of the other detailed requirements for OBD. Vehicles may be type-approved, registered and sold with such deficiencies according to the requirements of paragraph 4. of this annex.

3. Requirements and tests

3.1. All vehicles shall be equipped with an OBD system so designed, constructed and installed in a vehicle as to enable it to identify types of deterioration or malfunction over the entire life of the vehicle. In achieving this objective the approval authority shall accept that vehicles which have travelled distances in excess of the Type V durability distance (according to Annex 9 of this Regulation) referred to in paragraph 3.3.1., may show some deterioration in OBD system performance such that the emission limits given in paragraph 3.3.2. may be exceeded before the OBD system signals a failure to the driver of the vehicle.

3.1.1. Access to the OBD system required for the inspection, diagnosis, servicing or repair of the vehicle shall be unrestricted and standardised. All emission-related fault codes shall be consistent with paragraph 6.5.3.4. of Appendix 1 to this annex.

3.1.2. No later than three months after the manufacturer has provided any authorised dealer or repair shop with repair information, the manufacturer shall make that information (including all subsequent amendments and supplements) available upon reasonable and non-discriminatory payment and shall notify the approval authority accordingly.

In the event of failure to comply with these provisions the approval authority shall act to ensure that repair information is available, in accordance with the procedures laid down for type approval and in-service surveys.

3.2. The OBD system shall be so designed, constructed and installed in a vehicle as to enable it to comply with the requirements of this annex during conditions of normal use.

3.2.1. Temporary disablement of the OBD system

3.2.1.1. A manufacturer may disable the OBD system if its ability to monitor is affected by low fuel levels. Disablement shall not occur when the fuel tank level is above 20 per cent of the nominal capacity of the fuel tank.

3.2.1.2. A manufacturer may disable the OBD system at ambient engine starting temperatures below 266 K (-7 °C) or at elevations over 2,500 metres above sea level provided the manufacturer submits data and/or an engineering evaluation which adequately demonstrate that monitoring would be unreliable when such conditions exist. A manufacturer may also request disablement of the OBD system at other ambient engine starting temperatures if he demonstrates to the authority with data and/or an engineering evaluation that misdiagnosis would occur under such conditions. Misdiagnosis would occur under such conditions. It is not necessary to illuminate the malfunction indicator (MI) if the OBD thresholds are exceeded during a regeneration provided no defect is present.

3.2.1.3. For vehicles designed to accommodate the installation of power take-off units, disablement of affected monitoring systems is permitted provided disablement occurs only when the power take-off unit is active.

In addition to the provisions of this section the manufacturer may temporarily disable the OBD system in the following conditions:

(a) For flex fuel or mono/bi fuel gas vehicles during 1 minute after re- fuelling to allow for the recognition of fuel quality and composition by the ECU;

(b) For bi fuel vehicles during 5 seconds after fuel switching to allow for readjusting engine parameters;

(c) The manufacturer may deviate from these time limits if it can demonstrate that stabilisation of the fuelling system after re-fuelling or fuel switching takes longer for justified technical reasons. In any case, the OBD system shall be re-enabled as soon as either the fuel quality and composition is recognised or the engine parameters are readjusted.

3.2.2. Engine misfire in vehicles equipped with positive-ignition engines

3.2.2.1. Manufacturers may adopt higher misfire percentage malfunction criteria than those declared to the authority, under specific engine speed and load conditions where it can be demonstrated to the authority that the detection of lower levels of misfire would be unreliable.

3.2.2.2. When a manufacturer can demonstrate to the authority that the detection of higher levels of misfire percentages is still not feasible, or that misfire cannot be distinguished from other effects (e.g. rough roads, transmission shifts, after engine starting; etc.) the misfire monitoring system may be disabled when such conditions exist.

3.3. Description of tests

3.3.1. The test are carried out on the vehicle used for the Type V durability test, given in Annex 9, and using the test procedure in Appendix 1 to this annex. Tests are carried out at the conclusion of the Type V durability testing.

When no Type V durability testing is carried out, or at the request of the manufacturer, a suitably aged and representative vehicle may be used for these OBD demonstration tests.

3.3.2. The OBD system shall indicate the failure of an emission-related component or system when that failure results in emissions exceeding the threshold limits given below:

OBD threshold limits

		Reference mass (RW) (kg)	Mass of carbon monoxide		Mass of non-methane hydrocarbons		Mass of oxides of nitrogen		Mass of particulates
		Reference mass (RW) (kg)	(CO) (mg/km)		(NMHC) (mg/km)		(NOx) (mg/km)		(PM) (mg/km)
Category	Class		PI	CI	PI	CI	PI	CI	PI1	CI2
M	-	All	1900	1900	250	320	300	540	50	50
N13	I	RW ≤ 1305	1900	1900	250	320	300	540	50	50
	II	1305 < RW ≤ 1760	3400	2400	330	360	375	705	50	50
	III	1760 < RW	4300	2800	400	400	410	840	50	50
N2	-	All	4300	2800	400	400	410	840	50	50

Key: PI = Positive Ignition, CI = Compression Ignition

1 Positive ignition particulate mass standards apply only to vehicles with direct injection engines.

2 PM threshold limit of 80 mg/km shall apply to vehicles of categories M and N with a reference mass greater than 1,760 kg until 1 September 2011 for the type approval of new types of vehicles.

3 Includes M1 vehicles that meet the "special social needs" definition.

3.3.3. Monitoring requirements for vehicles equipped with positive-ignition engines;

In satisfying the requirements of paragraph 3.3.2. the OBD system shall, at a minimum, monitor for:

3.3.3.1. The reduction in the efficiency of the catalytic converter with respect to emissions of THC and NOx. Manufacturers may monitor the front catalyst alone or in combination with the next catalyst(s) downstream. Each monitored catalyst or catalyst combination shall be considered malfunctioning when the emissions exceed the NMHC or NOx threshold limits provided for by paragraph 3.3.2. of this annex.

3.3.3.2. The presence of engine misfire in the engine operating region bounded by the following lines:

(a) A maximum speed of 4,500 min-1 or 1,000 min-1 greater than the highest speed occurring during a Type I Test cycle, whichever is the lower;

(b) The positive torque line (i.e. engine load with the transmission in neutral);

(c) A line joining the following engine operating points: the positive torque line at 3,000 min-1 and a point on the maximum speed line defined in (a) above with the engine's manifold vacuum at 13.33 kPa lower than that at the positive torque line.

3.3.3.3. Oxygen sensor deterioration

This section shall mean that the deterioration of all oxygen sensors fitted and used for monitoring malfunctions of the catalytic converter according to the requirements of this annex shall be monitored.

3.3.3.4. If active on the selected fuel, other emission control system components or systems, or emission related power train components or systems which are connected to a computer, the failure of which may result in tailpipe emissions exceeding the limits given in paragraph 3.3.2;

3.3.3.5. Unless otherwise monitored, any other emission-related power-train component connected to a computer, including any relevant sensors to enable monitoring functions to be carried out, shall be monitored for circuit continuity;

3.3.3.6. The electronic evaporative emission purge control shall, at a minimum, be monitored for circuit continuity.

3.3.3.7. For direct injection positive ignition engines any malfunction, which may lead to emissions exceeding the particulate threshold limits provided for by paragraph 3.3.2. of this annex and which has to be monitored according to the requirements of this annex for compression ignition engines, shall be monitored.

3.3.4. Monitoring requirements for vehicles equipped with compression-ignition engines

In satisfying the requirements of paragraph 3.3.2. the OBD system shall monitor:

3.3.4.1. Where fitted, reduction in the efficiency of the catalytic converter;

3.3.4.2. Where fitted, the functionality and integrity of the particulate trap;

3.3.4.3. The fuel-injection system electronic fuel quantity and timing actuator(s) is/are monitored for circuit continuity and total functional failure;

3.3.4.4. Other emission control system components or systems, or emission-related power-train components or systems, which are connected to a computer, the failure of which may result in exhaust emissions exceeding the limits given in paragraph 3.3.2. Examples of such systems or components are those for monitoring and control of air mass-flow, air volumetric flow (and temperature), boost pressure and inlet manifold pressure (and relevant sensors to enable these functions to be carried out).

3.3.4.5. Unless otherwise monitored, any other emission-related power-train component connected to a computer shall be monitored for circuit continuity.

3.3.4.6. Malfunctions and the reduction in efficiency of the EGR system shall be monitored.

3.3.4.7. Malfunctions and the reduction in efficiency of a NOx after-treatment system using a reagent and the reagent dosing sub-system shall be monitored.

3.3.4.8. Malfunctions and the reduction in efficiency of NOx after-treatment not using a reagent shall be monitored.

3.3.5. Manufacturers may demonstrate to the approval authority that certain components or systems need not be monitored if, in the event of their total failure or removal, emissions do not exceed the emission limits given in paragraph 3.3.2.

3.4. A sequence of diagnostic checks shall be initiated at each engine start and completed at least once provided that the correct test conditions are met. The test conditions shall be selected in such a way that they all occur under normal driving as represented by the Type I Test.

3.5. Activation of malfunction indicator (MI)

3.5.1. The OBD system shall incorporate a malfunction indicator readily perceivable to the vehicle operator. The MI shall not be used for any other purpose except to indicate emergency start-up or limp-home routines to the driver. The MI shall be visible in all reasonable lighting conditions. When activated, it shall display a symbol in conformity with ISO 2575. A vehicle shall not be equipped with more than one general purpose MI for emission-related problems. Separate specific purpose telltales (e. g. brake system, fasten seat belt, oil pressure, etc.) are permitted. The use of red colour for an MI is prohibited.

3.5.2. For strategies requiring more than two preconditioning cycles for MI activation, the manufacturer must provide data and/or an engineering evaluation which adequately demonstrates that the monitoring system is equally effective and timely in detecting component deterioration. Strategies requiring on average more than ten driving cycles for MI activation are not accepted. The MI must also activate whenever the engine control enters a permanent emission default mode of operation if the emission limits given in paragraph 3.3.2. are exceeded or if the OBD system is unable to fulfil the basic monitoring requirements specified in paragraph 3.3.3. or 3.3.4. of this annex. The MI must operate in a distinct warning mode, e.g. a flashing light, under any period during which engine misfire occurs at a level likely to cause catalyst damage, as specified by the manufacturer. The MI must also activate when the vehicle's ignition is in the "key‑on" position before engine starting or cranking and de‑activate after engine starting if no malfunction has previously been detected.

3.6. The OBD system must record fault code(s) indicating the status of the emission control system. Separate status codes must be used to identify correctly functioning emission control systems and those emission control systems which need further vehicle operation to be fully evaluated. If the MI is activated due to deterioration or malfunction or permanent emission default modes of operation, a fault code must be stored that identifies the type of malfunction. A fault code must also be stored in the cases referred to in paragraphs 3.3.3.5. and 3.3.4.5. of this annex.

3.6.1. The distance travelled by the vehicle while the MI is activated shall be available at any instant through the serial port on the standard link connector.

3.6.2. In the case of vehicles equipped with positive-ignition engines, misfiring cylinders need not be uniquely identified if a distinct single or multiple cylinder misfire fault code is stored.

3.7. Extinguishing the MI

3.7.1. If misfire at levels likely to cause catalyst damage (as specified by the manufacturer) is not present any more, or if the engine is operated after changes to speed and load conditions where the level of misfire will not cause catalyst damage, the MI may be switched back to the previous state of activation during the first driving cycle on which the misfire level was detected and may be switched to the normal activated mode on subsequent driving cycles. If the MI is switched back to the previous state of activation, the corresponding fault codes and stored freeze-frame conditions may be erased.

3.7.2. For all other malfunctions, the MI may be de-activated after three subsequent sequential driving cycles during which the monitoring system responsible for activating the MI ceases to detect the malfunction and if no other malfunction has been identified that would independently activate the MI.

3.8. Erasing a fault code

3.8.1. The OBD system may erase a fault code and the distance travelled and freeze-frame information if the same fault is not re-registered in at least 40 engine warm-up cycles.

3.9. Bi-fuelled gas vehicles

In general, for bi-fuelled gas vehicles for each of the fuel types (petrol and (NG/biomethane)/LPG)) all the OBD requirements as for a mono-fuelled vehicle are applicable. To this end one of the following two options in paragraphs 3.9.1. or 3.9.2. or any combination thereof shall be used.

3.9.1. One OBD system for both fuel types.

3.9.1.1. The following procedures shall be executed for each diagnostic in a single OBD system for operation on petrol and on (NG/biomethane)/LPG, either independent of the fuel currently in use or fuel type specific:

(a) Activation of malfunction indicator (MI) (see paragraph 3.5. of this annex);

(b) Fault code storage (see paragraph 3.6. of this annex);

(d) Erasing a fault code (see paragraph 3.8. of this annex).

For components or systems to be monitored, either separate diagnostics for each fuel type can be used or a common diagnostic.

3.9.1.2. The OBD system can reside in either one or more computers.

3.9.2. Two separate OBD systems, one for each fuel type.

3.9.2.1. The following procedures shall be executed independently of each other when the vehicle is operated on petrol or on (NG/biomethane)/LPG:

(a) Activation of malfunction indicator (MI) (see paragraph 3.5. of this annex);

(b) Fault code storage (see paragraph 3.6. of this annex);

(d) Erasing a fault code (see paragraph 3.8. of this annex).

3.9.2.2. The separate OBD systems can reside in either one or more computers.

3.9.3. Specific requirements regarding the transmission of diagnostic signals from bi-fuelled gas vehicles.

3.9.3.1. On a request from a diagnostic scan tool, the diagnostic signals shall be transmitted on one or more source addresses. The use of source addresses is described in ISO DIS 15031-5 "Road vehicles - communication between vehicles and external test equipment for emissions-related diagnostics – Part 5: Emissions-related diagnostic services", dated 1 November 2001.

3.9.3.2. Identification of fuel specific information can be realized:

(a) By use of source addresses; and/or

(b) By use of a fuel select switch; and/or

3.9.4. Regarding the status code (as described in paragraph 3.6. of this annex), one of the following two options has to be used, if one or more of the diagnostics reporting readiness is fuel type specific:

(a) The status code is fuel specific, i.e. use of two status codes, one for each fuel type;

(b) The status code shall indicate fully evaluated control systems for both fuel types (petrol and (NG/biomethane)/LPG)) when the control systems are fully evaluated for one of the fuel types.

If none of the diagnostics reporting readiness is fuel type specific, then only one status code has to be supported.

4. Requirements relating to the type-approval of on-board diagnostic systems

4.1. A manufacturer may request to the authority that an OBD system be accepted for type-approval even though the system contains one or more deficiencies such that the specific requirements of this annex are not fully met.

4.2. In considering the request, the authority shall determine whether compliance with the requirements of this annex is infeasible or unreasonable.

The Approval Authority shall take into consideration data from the manufacturer that details such factors as, but not limited to, technical feasibility, lead time and production cycles including phase-in or phase-out of engines or vehicle designs and programmed upgrades of computers, the extent to which the resultant OBD system will be effective in complying with the requirements of this Regulation and that the manufacturer has demonstrated an acceptable level of effort towards compliance with the requirements of this Regulation.

4.2.1. The authority will not accept any deficiency request that includes the complete lack of a required diagnostic monitor.

4.2.2. The authority will not accept any deficiency request that does not respect the OBD threshold limits in paragraph 3.3.2.

4.3. In determining the identified order of deficiencies, deficiencies relating to paragraphs 3.3.3.1., 3.3.3.2. and 3.3.3.3. of this annex for positive-ignition engines and paragraphs 3.3.4.1., 3.3.4.2. and 3.3.4.3. of this annex for compression-ignition engines shall be identified first.

4.4. Prior to or at the time of type-approval, no deficiency shall be granted in respect of the requirements of paragraph 6.5., except paragraph 6.5.3.4. of Appendix 1 to this annex.

4.5. Deficiency period

4.5.1. A deficiency may be carried-over for a period of two years after the date of type-approval of the vehicle type unless it can be adequately demonstrated that substantial vehicle hardware modifications and additional lead-time beyond two years would be necessary to correct the deficiency. In such a case, the deficiency may be carried-over for a period not exceeding three years.

4.5.2. A manufacturer may request that the Approval Authority grant a deficiency retrospectively when such a deficiency is discovered after the original type-approval. In this case, the deficiency may be carried-over for a period of two years after the date of notification to the administrative department unless it can be adequately demonstrated that substantial vehicle hardware modifications and additional lead-time beyond two years would be necessary to correct the deficiency. In such a case, the deficiency may be carried-over for a period not exceeding three years.

4.6. The authority shall notify its decision in granting a deficiency request to all other Parties to the 1958 Agreement applying this Regulation.

5. Access to OBD information

5.1. Applications for type-approval or amendment of a type-approval shall be accompanied by the relevant information concerning the vehicle OBD system. This relevant information shall enable manufacturers of replacement or retrofit components to make the parts they manufacture compatible with the vehicle OBD system with a view to fault-free operation assuring the vehicle user against malfunctions. Similarly, such relevant information shall enable the manufacturers of diagnostic tools and test equipment to make tools and equipment that provide for effective and accurate diagnosis of vehicle emission control systems.

5.2. Upon request, the Administrative Departments shall make Appendix 1 of Annex 2 containing the relevant information on the OBD system available to any interested components, diagnostic tools or test equipment manufacturer on a non-discriminatory basis.

5.2.1. If a Administrative Department receives a request from any interested components, diagnostic tools or test equipment manufacturer for information on the OBD system of a vehicle that has been type-approved to a previous version of Regulation,

(a) The Administrative department shall, within 30 days, request the manufacturer of the vehicle in question the type to make available the information required in paragraph 4.2.12.2.7.6. of Annex 1. The requirement of the second section of paragraph 4.2.12.2.7.6. is not applicable;

(b) The manufacturer shall submit this information to the Administrative department within two months of the request;

(c) The Administrative department shall transmit this information to the Administrative departments of the Contracting Parties and the Administrative department which granted the original type-approval shall attach this information to Annex 1 of the vehicle type-approval information.

This requirement shall not invalidate any approval previously granted pursuant to Regulation No. 83 nor prevent extensions to such approvals under the terms of the Regulation under which they were originally granted.

5.2.2. Information can only be requested for replacement or service components that are subject to UNECE type-approval, or for components that form part of a system that is subject to UNECE type-approval.

5.2.3. The request for information must identify the exact specification of the vehicle model for which the information is required. It must confirm that the information is required for the development of replacement or retrofit parts or components or diagnostic tools or test equipment.

Annex 11 - Appendix 1

Functional aspects of on-board diagnostic (OBD) systems

1. Introduction

This Appendix describes the procedure of the test according to paragraph 3. of Annex 11. The procedure describes a method for checking the function of the on-board diagnostic (OBD) system installed on the vehicle by failure simulation of relevant systems in the engine management or emission control system. It also sets procedures for determining the durability of OBD systems.

The manufacturer shall make available the defective components and/or electrical devices which would be used to simulate failures. When measured over the Type I Test cycle, such defective components or devices shall not cause the vehicle emissions to exceed the limits of paragraph 3.3.2. by more than 20 per cent.

When the vehicle is tested with the defective component or device fitted, the OBD system is approved if the MI is activated. The OBD system is also approved if the MI is activated below the OBD threshold limits.

2. Description of test

2.1. The testing of OBD systems consists of the following phases:

2.1.1. Simulation of malfunction of a component of the engine management or emission control system,

2.1.2. Preconditioning of the vehicle with a simulated malfunction over preconditioning specified in paragraph 6.2.1. or paragraph 6.2.2.

2.1.3. Driving the vehicle with a simulated malfunction over the Type I Test cycle and measuring the emissions of the vehicle,

2.1.4. Determining whether the OBD system reacts to the simulated malfunction and indicates malfunction in an appropriate manner to the vehicle driver.

2.2. Alternatively, at the request of the manufacturer, malfunction of one or more components may be electronically simulated according to the requirements of paragraph 6. below.

2.3. Manufacturers may request that monitoring take place outside the Type I Test cycle if it can be demonstrated to the authority that monitoring during conditions encountered during the Type I Test cycle would impose restrictive monitoring conditions when the vehicle is used in service.

3. Test vehicle and fuel

3.1. Vehicle

The test vehicle shall meet the requirements of paragraph 3.2. of Annex 4a.

3.2. Fuel

The appropriate reference fuel as described in Annex 10 for petrol and diesel fuels and in Annex 10a for LPG and NG fuels must be used for testing. The fuel type for each failure mode to be tested (described in paragraph 6.3. of this appendix) may be selected by the administrative department from the reference fuels described in Annex 10a in the case of the testing of a mono-fuelled gas vehicle and from the reference fuels described in Annex 10 and Annex 10a in the case of the testing of a bi-fuelled gas vehicle. The selected fuel type must not be changed during any of the test phases (described in paragraphs 2.1. to 2.3. of this appendix). In the case of the use of LPG or NG/biomethane as a fuel it is permissible that the engine is started on petrol and switched to LPG or NG/biomethane after a pre-determined period of time which is controlled automatically and not under the control of the driver.

4. Test temperature and pressure

4.1. The test temperature and pressure shall meet the requirements of the Type I Test as described in paragraph 3.2. of Annex 4a.

5. Test equipment

5.1. Chassis dynamometer

The chassis dynamometer shall meet the requirements of Appendix 1 of Annex 4a.

6. OBD test procedure

6.1. The operating cycle on the chassis dynamometer shall meet the requirements of Annex 4a.

6.2. Vehicle preconditioning

6.2.1. According to the engine type and after introduction of one of the failure modes given in paragraph 6.3., the vehicle shall be preconditioned by driving at least two consecutive Type I Tests (Parts One and Two). For compression-ignition engined vehicles an additional preconditioning of two Part Two cycles is permitted.

6.2.2. At the request of the manufacturer, alternative preconditioning methods may be used.

6.3. Failure modes to be tested

6.3.1. Positive-ignition engined vehicles:

6.3.1.1. Replacement of the catalyst with a deteriorated or defective catalyst or electronic simulation of such a failure.

6.3.1.2. Engine misfire conditions according to the conditions for misfire monitoring given in paragraph 3.3.3.2. of Annex 11.

6.3.1.3. Replacement of the oxygen sensor with a deteriorated or defective oxygen sensor or electronic simulation of such a failure.

6.3.1.4. Electrical disconnection of any other emission-related component connected to a power-train management computer (if active on the selected fuel type).

6.3.1.5. Electrical disconnection of the electronic evaporative purge control device (if equipped and if active on the selected fuel type). For this specific failure mode, the Type I Test need not be performed.

6.3.2. Compression-ignition engined vehicles:

6.3.2.1. Where fitted, replacement of the catalyst with a deteriorated or defective catalyst or electronic simulation of such a failure.

6.3.2.2. Where fitted, total removal of the particulate trap or, where sensors are an integral part of the trap, a defective trap assembly.

6.3.2.3. Electrical disconnection of any fuelling system electronic fuel quantity and timing actuator.

6.3.2.4. Electrical disconnection of any other emission-related component connected to a power-train management computer.

6.3.2.5. In meeting the requirements of paragraphs 6.3.2.3. and 6.3.2.4., and with the agreement of the approval authority, the manufacturer shall take appropriate steps to demonstrate that the OBD system will indicate a fault when disconnection occurs.

6.3.2.6. The manufacturer shall demonstrate that malfunctions of the EGR flow and cooler are detected by the OBD system during its approval test.

6.4. OBD system test

6.4.1. Vehicles fitted with positive-ignition engines:

6.4.1.1. After vehicle preconditioning according to paragraph 6.2., the test vehicle is driven over a Type I Test (Parts One and Two).

The MI shall activate before the end of this test under any of the conditions given in paragraphs 6.4.1.2. to 6.4.1.5. The Technical Service may substitute those conditions with others in accordance with paragraph 6.4.1.6. However, the total number of failures simulated shall not exceed four (4) for the purpose of type approval.

In the case of testing a bi-fuel gas vehicle, both fuel types shall be used within the maximum of four (4) simulated failures at the discretion of the type-approval authority.

6.4.1.2. Replacement of a catalyst with a deteriorated or defective catalyst or electronic simulation of a deteriorated or defective catalyst that results in emissions exceeding the NMHC limit given in paragraph 3.3.2. of Annex 11.

6.4.1.3. An induced misfire condition according to the conditions for misfire monitoring given in paragraph 3.3.3.2. of Annex 11 that results in emissions exceeding any of the limits given in paragraph 3.3.2. of Annex 11.

6.4.1.4. Replacement of an oxygen sensor with a deteriorated or defective oxygen sensor or electronic simulation of a deteriorated or defective oxygen sensor that results in emissions exceeding any of the limits given in paragraph 3.3.2. of Annex 11.

6.4.1.5. Electrical disconnection of the electronic evaporative purge control device (if equipped and if active on the selected fuel type).

6.4.1.6. Electrical disconnection of any other emission-related power-train component connected to a computer that results in emissions exceeding any of the limits given in paragraph 3.3.2. of this annex (if active on the selected fuel type).

6.4.2. Vehicles fitted with compression-ignition engines:

6.4.2.1. After vehicle preconditioning according to paragraph 6.2., the test vehicle is driven over a Type I Test (Parts One and Two).

The MI shall activate before the end of this test under any of the conditions given in paragraphs 6.4.2.2. to 6.4.2.5. The technical service may substitute those conditions by others in accordance with paragraph 6.4.2.5. However, the total number of failures simulated shall not exceed four for the purposes of type approval.

6.4.2.2. Where fitted, replacement of a catalyst with a deteriorated or defective catalyst or electronic simulation of a deteriorated or defective catalyst that results in emissions exceeding limits given in paragraph 3.3.2. of Annex 11.

6.4.2.3. Where fitted, total removal of the particulate trap or replacement of the particulate trap with a defective particulate trap meeting the conditions of paragraph 6.3.2.2. above that results in emissions exceeding the limits given in paragraph 3.3.2. of Annex 11.

6.4.2.4. With reference to paragraph 6.3.2.5., disconnection of any fuelling system electronic fuel quantity and timing actuator that results in emissions exceeding any of the limits given in paragraph 3.3.2. of Annex 11.

6.4.2.5. With reference to paragraph 6.3.2.5., disconnection of any other emission-related power-train component connected to a computer that results in emissions exceeding any of the limits given in paragraph 3.3.2. of Annex 11.

6.5. Diagnostic signals

6.5.1.1. Upon determination of the first malfunction of any component or system, "freeze-frame" engine conditions present at the time shall be stored in computer memory. Should a subsequent fuel system or misfire malfunction occur, any previously stored freeze-frame conditions shall be replaced by the fuel system or misfire conditions (whichever occurs first). Stored engine conditions shall include, but are not limited to calculated load value, engine speed, fuel trim value(s) (if available), fuel pressure (if available), vehicle speed (if available), coolant temperature, intake manifold pressure (if available), closed- or open-loop operation (if available) and the fault code which caused the data to be stored. The manufacturer shall choose the most appropriate set of conditions facilitating effective repairs for freeze-frame storage. Only one frame of data is required. Manufacturers may choose to store additional frames provided that at least the required frame can be read by a generic scan tool meeting the specifications of paragraphs 6.5.3.2. and 6.5.3.3. If the fault code causing the conditions to be stored is erased in accordance with paragraph 3.7. of Annex 11, the stored engine conditions may also be erased.

6.5.1.2. If available, the following signals in addition to the required freeze-frame information shall be made available on demand through the serial port on the standardised data link connector, if the information is available to the on-board computer or can be determined using information available to the on-board computer: diagnostic trouble codes, engine coolant temperature, fuel control system status (closed-loop, open-loop, other), fuel trim, ignition timing advance, intake air temperature, manifold air pressure, air flow rate, engine speed, throttle position sensor output value, secondary air status (upstream, downstream or atmosphere), calculated load value, vehicle speed and fuel pressure.

The signals shall be provided in standard units based on the specifications given in paragraph 6.5.3. Actual signals shall be clearly identified separately from default value or limp-home signals.

6.5.1.3. For all emission control systems for which specific on-board evaluation tests are conducted (catalyst, oxygen sensor, etc.), except misfire detection, fuel system monitoring and comprehensive component monitoring, the results of the most recent test performed by the vehicle and the limits to which the system is compared shall be made available through the serial data port on the standardised data link connector according to the specifications given in paragraph 6.5.3. For the monitored components and systems excepted above, a pass/fail indication for the most recent test results shall be available through the data link connector.

All data required to be stored in relation to OBD in-use performance according to the provisions of paragraph 7.6. of this appendix shall be available through the serial data port on the standardized data link connector according to the specifications given in paragraph 6.5.3. of Appendix 1 to Annex 11 of this Regulation.

6.5.1.4. The OBD requirements to which the vehicle is certified (i.e. Annex 11 or the alternative requirements specified in paragraph 5.) and the major emission control systems monitored by the OBD system consistent with paragraph 6.5.3.3. shall be available through the serial data port on the standardised data link connector according to the specifications given in paragraph 6.5.3. of this Appendix.

6.5.1.5. From 1 January 2003 for new types and from 1 January 2005 for all types of vehicles entering into service, the software calibration identification number shall be made available through the serial port on the standardised data link connector. The software calibration identification number shall be provided in a standardised format.

6.5.2. The emission control diagnostic system is not required to evaluate components during malfunction if such evaluation would result in a risk to safety or component failure.

6.5.3. The emission control diagnostic system must provide for standardised and unrestricted access and conform with the following ISO standards and/or SAE specification.

6.5.3.1. One of the following standards with the restrictions as described must be used as the on‑board to off-board communications link:

ISO 9141 - 2: 1994 (amended 1996) "Road Vehicles – Diagnostic Systems – Part 2: CARB requirements for interchange of digital information;

SAE J1850: March 1998 Class B Data Communication Network Interface". Emission‑related messages must use the cyclic redundancy check and the three-byte header and not use inter‑byte separation or checksums;

ISO 14230 – Part 4 "Road Vehicles – Keyword protocol 2000 for diagnostic systems – Part 4: Requirements for emission-relate systems";

ISO DIS 15765-4 "Road vehicles – Diagnostics on Controller Area Network (CAN) – Part 4: Requirements for emissions-related systems", dated 1 November 2001.

6.5.3.2. Test equipment and diagnostic tools needed to communicate with OBD systems must meet or exceed the functional specification given in ISO DIS 15031-4 "Road vehicles – Communication between vehicle and external test equipment for emissions-related diagnostics – Part 4: External test equipment", dated 1 November 2001.

6.5.3.3. Basic diagnostic data, (as specified in paragraph 6.5.1.) and bi‑directional control information must be provided using the format and units described in ISO DIS 15031-5 "Road vehicles – Communication between vehicle and external test equipment for emissions-related diagnostics – Part 5: Emissions-related diagnostic services", dated 1 November 2001, and must be available using a diagnostic tool meeting the requirements of ISO DIS 15031-4.

The vehicle manufacturer shall provide to a national standardisation body the details of any emission-related diagnostic data, e.g. PID’s, OBD monitor Id’s, Test Id’s not specified in ISO DIS 15031-5 but related to this Regulation.

6.5.3.4. When a fault is registered, the manufacturer must identify the fault using an appropriate fault code consistent with those given in Section 6.3. of ISO DIS 15031-6 “Road vehicles – Communication between vehicle and external test equipment for emissions-related diagnostics – Part 6: Diagnostic trouble code definitions”, relating to “emission related system diagnostic trouble codes”. If such identification is not possible, the manufacturer may use diagnostic trouble codes according to Sections 5.3. and 5.6. of ISO DIS 15031-6. The fault codes must be fully accessible by standardised diagnostic equipment complying with the provisions of paragraph 6.5.3.2. of this annex.

6.5.3.5. The connection interface between the vehicle and the diagnostic tester must be standardised and must meet all the requirements of ISO DIS 15031‑3 "Road vehicles – Communication between vehicle and external test equipment for emissions-related diagnostics – Part 3: Diagnostic connector and related electrical circuits: specification and use", dated 1 November 2001. The installation position must be subject to agreement of the administrative department such that it is readily accessible by service personnel but protected from tampering by non‑qualified personnel.

6.5.3.6. The manufacturer shall also make accessible, where appropriate on payment, the technical information required for the repair or maintenance of motor vehicles unless that information is covered by an intellectual property right or constitutes essential, secret know-how which is identified in an appropriate form; in such case, the necessary technical information shall not be withheld improperly.

Entitled to such information is any person engaged in commercially servicing or repairing, road-side rescuing, inspecting or testing of vehicles or in the manufacturing or selling replacement or retro-fit components, diagnostic tools and test equipment.

7. In-use performance

7.1. General Requirements

7.1.1. Each monitor of the OBD system shall be executed at least once per driving cycle in which the monitoring conditions as specified in paragraph 3.2. are met. Manufacturers may not use the calculated ratio (or any element thereof) or any other indication of monitor frequency as a monitoring condition for any monitor.

7.1.2. The in-use performance ratio (IUPR) of a specific monitor M of the OBD systems and in-use performance of pollution control devices shall be:

IUPRM = NumeratorM / DenominatorM

7.1.3. Comparison of Numerator and Denominator gives an indication of how often a specific monitor is operating relative to vehicle operation. To ensure all manufacturers are tracking IUPRM in the same manner, detailed requirements are given for defining and incrementing these counters.

7.1.4. If, according to the requirements of this annex, the vehicle is equipped with a specific monitor M, IUPRM shall be greater or equal 0.1 for all monitors M.

7.1.5. The requirements of this paragraph are deemed to be met for a particular monitor M, if for all vehicles of a particular OBD family manufactured in a particular calendar year the following statistical conditions hold:

(a) The average IUPRM is equal or above the minimum value applicable to the monitor;

(b) More than 50 per cent of all vehicles have an IUPRM equal or above the minimum value applicable to the monitor.

7.1.6. The manufacturer shall demonstrate to the approval authority that these statistical conditions are satisfied for vehicles manufactured in a given calendar year for all monitors required to be reported by the OBD system according to paragraph 7.6. of this appendix not later than 18 months after the end of a calendar year. For this purpose, statistical tests shall be used which implement recognised statistical principles and confidence levels.

7.1.7. For demonstration purposes of this paragraph the manufacturer may group vehicles within an OBD family by any other successive and non-overlapping 12 month manufacturing periods instead of calendar years. For establishing the test sample of vehicles at least the selection criteria of Appendix 3 paragraph 2. shall be applied. For the entire test sample of vehicles the manufacturer shall report to the approval authority all of the in-use performance data to be reported by the OBD system according to paragraph 7.6. of this appendix. Upon request, the approval authority which grants the approval shall make these data and the results of the statistical evaluation available to other approval authorities.

7.1.8. Public authorities and their delegates may pursue further tests on vehicles or collect appropriate data recorded by vehicles to verify compliance with the requirements of this annex.

7.2. NumeratorM

7.2.1. The numerator of a specific monitor is a counter measuring the number of times a vehicle has been operated such that all monitoring conditions necessary for the specific monitor to detect a malfunction in order to warn the driver, as they have been implemented by the manufacturer, have been encountered. The numerator shall not be incremented more than once per driving cycle, unless there is reasoned technical justification.

7.3. DenominatorM

7.3.1. The purpose of the denominator is to provide a counter indicating the number of vehicle driving events, taking into account special conditions for a specific monitor. The denominator shall be incremented at least once per driving cycle, if during this driving cycle such conditions are met and the general denominator is incremented as specified in paragraph 7.5. unless the denominator is disabled according to paragraph 7.7. of this appendix.

7.3.2. In addition to the requirements of paragraph 7.3.1.:

Secondary air system monitor denominator(s) shall be incremented if the commanded "on" operation of the secondary air system occurs for a time greater than or equal to 10 seconds. For purposes of determining this commanded "on" time, the OBD system may not include time during intrusive operation of the secondary air system solely for the purposes of monitoring.

Denominators of monitors of systems only active during cold start shall be incremented if the component or strategy is commanded "on" for a time greater than or equal to 10 seconds.

The denominator(s) for monitors of Variable Valve Timing (VVT) and/or control systems shall be incremented if the component is commanded to function (e.g., commanded "on", "open", "closed", "locked", etc.) on two or more occasions during the driving cycle or for a time greater than or equal to 10 seconds, whichever occurs first.

For the following monitors, the denominator(s) shall be incremented by one if, in addition to meeting the requirements of this paragraph on at least one driving cycle, at least 800 cumulative kilometres of vehicle operation have been experienced since the last time the denominator was incremented:

(i) Diesel oxidation catalyst;

(ii) Diesel particulate filter.

7.3.3. For hybrid vehicles, vehicles that employ alternative engine start hardware or strategies (e.g. integrated starter and generators), or alternative fuel vehicles (e.g. dedicated, bi-fuel, or dual-fuel applications), the manufacturer may request the approval of the approval authority to use alternative criteria to those set forth in this paragraph for incrementing the denominator. In general, the approval authority shall not approve alternative criteria for vehicles that only employ engine shut off at or near idle/vehicle stop conditions. Approval by the approval authority of the alternative criteria shall be based on the equivalence of the alternative criteria to determine the amount of vehicle operation relative to the measure of conventional vehicle operation in accordance with the criteria in this paragraph.

7.4. Ignition Cycle Counter

7.4.1. The ignition cycle counter indicates the number of ignition cycles a vehicle has experienced. The ignition cycle counter may not be incremented more than once per driving cycle.

7.5. General Denominator

7.5.1. The general denominator is a counter measuring the number of times a vehicle has been operated. It shall be incremented within 10 seconds, if and only if, the following criteria are satisfied on a single driving cycle:

(a) Cumulative time since engine start is greater than or equal to 600 seconds while at an elevation of less than 2,440 m above sea level and at an ambient temperature of greater than or equal to
-7° C;

(b) Cumulative vehicle operation at or above 40 km/h occurs for greater than or equal to 300 seconds while at an elevation of less than 2,440 m above sea level and at an ambient temperature of greater than or equal to -7 °C;

(c) Continuous vehicle operation at idle (i.e. accelerator pedal released by driver and vehicle speed less than or equal to 1.6 km/h) for greater than or equal to 30 seconds while at an elevation of less than 2,440 m above sea level and at an ambient temperature of greater than or equal to -7 °C.

7.6. Reporting and increasing counters

7.6.1. The OBD system shall report in accordance with the ISO 15031-5 specifications the ignition cycle counter and general denominator as well as separate numerators and denominators for the following monitors, if their presence on the vehicle is required by this annex:

(a) Catalysts (each bank to be reported separately);

(b) Oxygen/exhaust gas sensors, including secondary oxygen sensors (each sensor to be reported separately);

(d) EGR system;

(e) VVT system;

(f) Secondary air system;

(g) Particulate filter;

(h) NOx after-treatment system (e.g. NOx adsorber, NOx reagent/ catalyst system);

(i) Boost pressure control system.

7.6.2. For specific components or systems that have multiple monitors, which are required to be reported by this paragraph (e.g. oxygen sensor bank 1 may have multiple monitors for sensor response or other sensor characteristics), the OBD system shall separately track numerators and denominators for each of the specific monitors and report only the corresponding numerator and denominator for the specific monitor that has the lowest numerical ratio. If two or more specific monitors have identical ratios, the corresponding numerator and denominator for the specific monitor that has the highest denominator shall be reported for the specific component.

7.6.3. All counters, when incremented, shall be incremented by an integer of one.

7.6.4. The minimum value of each counter is 0, the maximum value shall not be less than 65,535, notwithstanding any other requirements on standardised storage and reporting of the OBD system.

7.6.5. If either the numerator or denominator for a specific monitor reaches its maximum value, both counters for that specific monitor shall be divided by two before being incremented again according to the provisions set in paragraphs 7.2 and 7.3. If the ignition cycle counter or the general denominator reaches its maximum value, the respective counter shall change to zero at its next increment according to the provisions set in paragraphs 7.4. and 7.5., respectively.

7.6.6. Each counter shall be reset to zero only when a non-volatile memory reset occurs (e.g. reprogramming event, etc.) or, if the numbers are stored in keep-alive memory (KAM), when KAM is lost due to an interruption in electrical power to the control module (e.g. battery disconnect, etc.).

7.6.7. The manufacturer shall take measures to ensure that the values of numerator and denominator can not be reset or modified, except in cases provided for explicitly in this paragraph.

7.7. Disablement of Numerators and Denominators and of the General Denominator

7.7.1. Within 10 seconds of a malfunction being detected, which disables a monitor required to meet the monitoring conditions of this annex (i.e. a pending or confirmed code is stored), the OBD system shall disable further incrementing of the corresponding numerator and denominator for each monitor that is disabled. When the malfunction is no longer detected (i.e., the pending code is erased through self-clearing or through a scan tool command), incrementing of all corresponding numerators and denominators shall resume within 10 seconds.

7.7.2. Within 10 seconds of the start of a power take-off operation (PTO) that disables a monitor required to meet the monitoring conditions of this annex, the OBD system shall disable further incrementing of the corresponding numerator and denominator for each monitor that is disabled. When the PTO operation ends, incrementing of all corresponding numerators and denominators shall resume within 10 seconds.

7.7.3. The OBD system shall disable further incrementing of the numerator and denominator of a specific monitor within 10 seconds, if a malfunction of any component used to determine the criteria within the definition of the specific monitor's denominator (i.e. vehicle speed, ambient temperature, elevation, idle operation, engine cold start, or time of operation) has been detected and the corresponding pending fault code has been stored. Incrementing of the numerator and denominator shall resume within 10 seconds when the malfunction is no longer present (e.g. pending code erased through self-clearing or by a scan tool command).

7.7.4. The OBD system shall disable further incrementing of the general denominator within 10 seconds, if a malfunction has been detected of any component used to determine whether the criteria in paragraph 7.5. are satisfied (i.e. vehicle speed, ambient temperature, elevation, idle operation, or time of operation) and the corresponding pending fault code has been stored. The general denominator may not be disabled from incrementing for any other condition. Incrementing of the general denominator shall resume within 10 seconds when the malfunction is no longer present (e.g., pending code erased through self-clearing or by a scan tool command).

Annex 13

Emissions test procedure for a vehicle equipped with a periodically regenerating system

1. Introduction

This annex defines the specific provisions regarding type-approval of a vehicle equipped with a periodically regenerating system as defined in paragraph 2.20. of this Regulation.

2. Scope and extension of the type approval

2.1. Vehicle family groups equipped with periodically regenerating system

The procedure applies to vehicles equipped with a periodically regenerating system as defined in paragraph 2.20. of this Regulation. For the purpose of this annex vehicle family groups may be established. Accordingly, those vehicle types with regenerative systems, whose parameters described below are identical, or within the stated tolerances, shall be considered to belong to the same family with respect to measurements specific to the defined periodically regenerating systems.

2.1.1. Identical parameters are:

Engine:

(a) Combustion process.

Periodically regenerating system (i.e. catalyst, particulate trap):

(a) Construction (i.e. type of enclosure, type of precious metal, type of substrate, cell density);

(b) Type and working principle;

(d) Volume ±10 per cent;

(e) Location (temperature ±50 °C at 120 km/h or 5 per cent difference of maximum temperature/pressure).

2.2. Vehicle types of different reference masses

The Ki factors developed by the procedures in this annex for type approval of a vehicle type with a periodically regenerating system as defined in paragraph 2.20. of this Regulation, may be extended to other vehicles in the family group with a reference mass within the next two higher equivalent inertia classes or any lower equivalent inertia.

3. Test Procedure

The vehicle may be equipped with a switch capable of preventing or permitting the regeneration process provided that this operation has no effect on original engine calibration. This switch shall be permitted only for the purpose of preventing regeneration during loading of the regeneration system and during the pre-conditioning cycles. However, it shall not be used during the measurement of emissions during the regeneration phase; rather the emission test shall be carried out with the unchanged Original Equipment Manufacturer's (OEM) control unit.

3.1. Exhaust emission measurement between two cycles where regenerative phases occur

3.1.1. Average emissions between regeneration phases and during loading of the regenerative device shall be determined from the arithmetic mean of several approximately equidistant (if more than 2) Type I operating cycles or equivalent engine test bench cycles. As an alternative, the manufacturer may provide data to show that the emissions remain constant (±15 per cent) between regeneration phases. In this case, the emissions measured during the regular Type I Test may be used. In any other case emissions measurement for at least two Type I operating cycles or equivalent engine test bench cycles must be completed: one immediately after regeneration (before new loading) and one as close as possible prior to a regeneration phase. All emissions measurements and calculations shall be carried out according to Annex 4a, paragraphs 6.4. to 6.6. Determination of average emissions for a single regenerative system shall be calculated according to paragraph 3.3. of this annex and for multiple regeneration systems according to paragraph 3.4. of this annex.

3.1.2. The loading process and Ki determination shall be made during the Type I operating cycle, on a chassis dynamometer or on an engine test bench using an equivalent test cycle. These cycles may be run continuously (i.e. without the need to switch the engine off between cycles). After any number of completed cycles, the vehicle may be removed from the chassis dynamometer, and the test continued at a later time.

3.1.3. The number of cycles (D) between two cycles where regeneration phases occur, the number of cycles over which emissions measurements are made (n), and each emissions measurement (M'sij) shall be reported in Annex 1, items 4.2.11.2.1.10.1. to 4.2.11.2.1.10.4. or 4.2.11.2.5.4.1. to 4.2.11.2.5.4.4. as applicable.

3.2. Measurement of emissions during regeneration

3.2.1. Preparation of the vehicle, if required, for the emissions test during a regeneration phase, may be completed using the preparation cycles in paragraph 6.3. of Annex 4a or equivalent engine test bench cycles, depending on the loading procedure chosen in paragraph 3.1.2. above.

3.2.2. The test and vehicle conditions for the Type I test described in Annex 4a apply before the first valid emission test is carried out.

3.2.3. Regeneration must not occur during the preparation of the vehicle. This may be ensured by one of the following methods:

3.2.3.1. A "dummy" regenerating system or partial system may be fitted for the pre-conditioning cycles.

3.2.3.2. Any other method agreed between the manufacturer and the type approval authority.

3.2.4. A cold-start exhaust emission test including a regeneration process shall be performed according to the Type I operating cycle, or equivalent engine test bench cycle. If the emissions tests between two cycles where regeneration phases occur are carried out on an engine test bench, the emissions test including a regeneration phase shall also be carried out on an engine test bench.

3.2.5. If the regeneration process requires more than one operating cycle, subsequent test cycle(s) shall be driven immediately, without switching the engine off, until complete regeneration has been achieved (each cycle shall be completed). The time necessary to set up a new test should be as short as possible (e.g. particular matter filter change). The engine must be switched off during this period.

3.2.6. The emission values during regeneration (Mri) shall be calculated according to Annex 4a, paragraph 6.6. The number of operating cycles (d) measured for complete regeneration shall be recorded.

3.3. Calculation of the combined exhaust emissions of a single regenerative system

(1) n  2

(2)

(3)

Where for each pollutant (i) considered:
M'sij	=	mass emissions of pollutant (i) in g/km over one Type I operating cycle (or equivalent engine test bench cycle) without regeneration,
M'rij	=	mass emissions of pollutant (i) in g/km over one Type I operating cycle (or equivalent engine test bench cycle) during regeneration (if d > 1, the first Type I test is run cold, and subsequent cycles are hot),
Msi	=	mass emissions of pollutant (i) in g/km without regeneration,
Mri	=	mass emissions of pollutant (i) in g/km during regeneration,
Mpi	=	mass emissions of pollutant (i) in g/km,
n	=	number of test points at which emissions measurements (Type I operating cycles or equivalent engine test bench cycles) are made between two cycles where regenerative phases occur,  2,
d	=	number of operating cycles required for regeneration,
D	=	number of operating cycles between two cycles where regenerative phases occur.

For exemplary illustration of measurement parameters see Figure 8/1.

Figure 8/1

Parameters measured during emissions test during and between cycles where regeneration occurs (schematic example, the emissions during "D" may increase or decrease)

3.3.1. Calculation of the regeneration factor K for each pollutant (i) considered

Ki = Mpi / Msi

Msi, Mpi and Ki results shall be recorded in the test report delivered by the Technical Service.

Ki may be determined following the completion of a single sequence.

3.4. Calculation of combined exhaust emissions of multiple periodic regenerating systems

(1) nk ≥ 2

(2)

(3)

(4)

(5)

(6)

(7)

Where:
Msi	=	mean mass emission of all events k of pollutant (i) in g/km without regeneration,
Mri	=	mean mass emission of all events k of pollutant (i) in g/km during regeneration,
Mpi	=	mean mass emission of all events k of pollutant (i) in g/km,
Msik	=	mean mass emission of event k of pollutant (i) in g/km without regeneration,
Mrik	=	mean mass emission of event k of pollutant (i) in g/km during regeneration,
M'sik,j	=	mass emissions of event k of pollutant (i) in g/km over one Type I operating cycle (or equivalent engine test bench cycle) without regeneration measured at point j; 1 ≤ j ≤ nk,
M'rik,j	=	mass emissions of event k of pollutant (i) in g/km over one Type I operating cycle (or equivalent engine test bench cycle) during regeneration (when j > 1, the first Type I test is run cold, and subsequent cycles are hot) measured at operating cycle j; 1 ≤ j ≤ nk,
nk	=	number of test points of event k at which emissions measurements (Type I operating cycles or equivalent engine test bench cycles) are made between two cycles where regenerative phases occur,  2,
dk	=	number of operating cycles of event k required for regeneration,
Dk	=	number of operating cycles of event k between two cycles where regenerative phases occur.

For an illustration of measurement parameters see Figure 8/2 (below)

Figure 8/2

Parameters measured during emissions test during and between cycles where regeneration occurs (schematic example)

For more details of the schematic process see Figure 8/3

Figure 8/3

Parameters measured during emissions test during and between cycles where regeneration occurs (schematic example)

For application of a simple and realistic case, the following description gives a detailed explanation of the schematic example shown in Figure 8/3 above:

1. "DPF": regenerative, equidistant events, similar emissions (±15 per cent) from event to event

Dk = Dk+1 = D1

dk = dk+1 = d1

Mrik – Msik = Mrik+1 – Msik+1

nk = n

2. "DeNOx": the desulphurisation (SO2 removal) event is initiated before an influence of sulphur on emissions is detectable (±15 per cent of measured emissions) and in this example for exothermic reason together with the last DPF regeneration event performed.

M'sik,j=1 = constant  Msik = Msik+1 = Msi2

Mrik = Mrik+1 = Mri2

For SO2 removal event: Mri2, Msi2, d2, D2, n2 = 1

3. Complete system (DPF + DeNOx):

The calculation of the factor (Ki) for multiple periodic regenerating systems is only possible after a certain number of regeneration phases for each system. After performing the complete procedure (A to B, see Figure 8/2), the original starting conditions A should be reached again.

3.4.1. Extension of approval for a multiple periodic regeneration system

3.4.1.1. If the technical parameter(s) and or the regeneration strategy of a multiple regeneration system for all events within this combined system are changed, the complete procedure including all regenerative devices should be performed by measurements to update the multiple ki – factor.

3.4.1.2. If a single device of the multiple regeneration system changed only in strategy parameters (i.e. such as "D" and/or "d" for DPF) and the manufacturer could present technical feasible data and information to the Technical Service that:

(a) There is no detectable interaction to the other device(s) of the system; and

(b) The important parameters (i.e. construction, working principle, volume, location etc.) are identical;

The necessary update procedure for ki could be simplified.

As agreed between the manufacturer and the Technical Service in such a case only a single event of sampling/storage and regeneration should be performed and the test results ("Msi", "Mri") in combination with the changed parameters ("D" and/or "d") could be introduced in the relevant formula(s) to update the multiple ki - factor in a mathematical way under substitution of the existing basis ki - factor formula(s)."

Annex 14

Emissions test procedure for hybrid electric vehicles (HEV)

1. Introduction

1.1. This annex defines the specific provisions regarding type-approval of a hybrid electric vehicle (HEV) as defined in paragraph 2.21.2. of this Regulation.

1.2. As a general principle, for the tests of Type I, II, III, IV, V, VI and OBD, hybrid electric vehicles shall be tested according to Annex 4a, 5, 6, 7, 9, 8 and 11 respectively, unless modified by this annex.

1.3. For the Type I test only, OVC vehicles (as categorized in paragraph 2.) shall be tested according to condition A and to condition B. The test results under both conditions A and B and the weighted values shall be reported in the communication form.

1.4. The emissions test results shall comply with the limits under all specified test conditions of this Regulation.

2. Categories of hybrid electric vehicles

Vehicle charging	Off-Vehicle Charging1 (OVC)		Not Off-Vehicle Charging2 (NOVC)
Operating mode switch	Without	With	Without	With

1 Also known as "externally chargeable"

2 Also known as "not externally chargeable"

3. Type I test methods

3.1. Externally chargeable (OVC HEV) without an operating mode switch

3.1.1. Two tests shall be performed under the following conditions:

Condition A: Test shall be carried out with a fully charged electrical energy/power storage device.

Condition B: Test shall be carried out with an electrical energy/power storage device in minimum state of charge (maximum discharge of capacity).

The profile of the state of charge (SOC) of the electrical energy/power storage device during different stages of the Type I test is given in Appendix 1.

3.1.2. Condition A

3.1.2.1. The procedure shall start with the discharge of the electrical energy/power storage device of the vehicle while driving (on the test track, on a chassis dynamometer, etc.):

(a) At a steady speed of 50 km/h until the fuel consuming engine of the HEV starts up;

(b) Or, if a vehicle cannot reach a steady speed of 50 km/h without starting up the fuel consuming engine, the speed shall be reduced until the vehicle can run a lower steady speed where the fuel consuming engine does not start up for a defined time/distance (to be specified between technical service and manufacturer);

The fuel consuming engine shall be stopped within 10 seconds of it being automatically started.

3.1.2.2. Conditioning of vehicle

3.1.2.2.1. For compression-ignition engined vehicles the Part Two cycle described in Table 2 (and Figure 3) of Annex 4a shall be used. Three consecutive cycles shall be driven according to paragraph 3.1.2.5.3. below.

3.1.2.2.2. Vehicles fitted with positive-ignition engines shall be preconditioned with one Part One and two Part Two driving cycles according to paragraph 3.1.2.5.3. below.

3.1.2.3. After this preconditioning, and before testing, the vehicle shall be kept in a room in which the temperature remains relatively constant between 293 and 303 K (20 °C and 30 °C). This conditioning shall be carried out for at least six hours and continue until the engine oil temperature and coolant, if any, are within ±2 K of the temperature of the room, and the electrical energy/power storage device is fully charged as a result of the charging prescribed in paragraph 3.1.2.4. below.

3.1.2.4. During soak, the electrical energy/power storage device shall be charged:

(a) With the on board charger if fitted; or

(b) With an external charger recommended by the manufacturer, using the normal overnight charging procedure.

This procedure excludes all types of special charges that could be automatically or manually initiated like, for instance, the equalization charges or the servicing charges.

The manufacturer shall declare that during the test, a special charge procedure has not occurred.

3.1.2.5. Test procedure

3.1.2.5.1. The vehicle shall be started up by the means provided for normal use to the driver. The first cycle starts on the initiation of the vehicle start-up procedure.

3.1.2.5.2. The test procedures defined in either paragraph 3.1.2.5.2.1. or 3.1.2.5.2.2. may be used in line with the procedure chosen in Regulation No. 101, Annex 8, paragraph 3.2.3.2.

3.1.2.5.2.1. Sampling shall begin (BS) before or at the initiation of the vehicle start up procedure and end on conclusion of the final idling period in the extra-urban cycle (Part Two, end of sampling (ES)).

3.1.2.5.2.2. Sampling shall begin (BS) before or at the initiation of the vehicle start up procedure and continue over a number of repeat test cycles. It shall end on conclusion of the final idling period in the first extra-urban (Part Two) cycle during which the battery reached the minimum state of charge according to the criterion defined below (end of sampling (ES)).

The electricity balance Q [Ah] is measured over each combined cycle, using the procedure specified in Appendix 2 of Annex 8 to Regulation No. 101, and used to determine when the battery minimum state of charge has been reached.

The battery minimum state of charge is considered to have been reached in combined cycle N if the electricity balance measured during combined cycle N+1 is not more than a 3 per cent discharge, expressed as a percentage of the nominal capacity of the battery (in Ah) in its maximum state of charge, as declared by the manufacturer. At the manufacturer's request additional test cycles may be run and their results included in the calculations in paragraphs 3.1.2.5.5. and 3.1.4.2. provided that the electricity balance for each additional test cycle shows less discharge of the battery than over the previous cycle.

In between each of the cycles a hot soak period of up to 10 minutes is allowed. The power train shall be switched off during this period.

3.1.2.5.3. The vehicle shall be driven according to provisions in Annex 4a, or in case of special gear shifting strategy, according to the manufacturer's instructions, as incorporated in the drivers' handbook of production vehicles and indicated by a technical gear shift instrument (for drivers' information). For these vehicles the gear shifting points prescribed in Annex 4a are not applied. For the pattern of the operating curve the description according to paragraph 6.1.3. of Annex 4a shall apply.

3.1.2.5.4. The exhaust gases shall be analyzed according to provisions in Annex 4a.

3.1.2.5.5. The test results shall be compared to the limits prescribed in paragraph 5.3.1.4. of this Regulation and the average emission of each pollutant in grams per kilometre for Condition A shall be calculated (M1i).

In the case of testing according to paragraph 3.1.2.5.2.1., (M1i) is simply the result of the single combined cycle run.

In the case of testing according to paragraph 3.1.2.5.2.2., the test result of each combined cycle run (M1ia), multiplied by the appropriate deterioration and Ki factors, shall be less than the limits prescribed in paragraph 5.3.1.4. of this Regulation. For the purposes of the calculation in paragraph 3.1.4 M1i shall be defined as:

Where:

i: pollutant

a: cycle

3.1.3. Condition B

3.1.3.1. Conditioning of vehicle

3.1.3.1.1. For compression-ignition engined vehicles the Part Two cycle described in Table 2 (and Figure 3) of Annex 4a shall be used. Three consecutive cycles shall be driven according to paragraph 3.1.3.4.3. below.

3.1.3.1.2. Vehicles fitted with positive-ignition engines shall be preconditioned with one Part One and two Part Two driving cycles according to paragraph 3.1.3.4.3. below.

3.1.3.2. The electrical energy/power storage device of the vehicle shall be discharged while driving (on the test track, on a chassis dynamometer, etc.):

(a) At a steady speed of 50 km/h until the fuel consuming engine of the HEV starts up;

(b) Or if a vehicle can not reach a steady speed of 50 km/h without starting up the fuel consuming engine, the speed shall be reduced until the vehicle can run a lower steady speed where the fuel consuming engine just does not start up for a defined time/distance (to be specified between technical service and manufacturer);

The fuel consuming engine shall be stopped within 10 seconds of it being automatically started.

3.1.3.3. After this preconditioning, and before testing, the vehicle shall be kept in a room in which the temperature remains relatively constant between 293 and 303 K (20 °C and 30 °C). This conditioning shall be carried out for at least six hours and continue until the engine oil temperature and coolant, if any, are within ±2 K of the temperature of the room.

3.1.3.4. Test procedure

3.1.3.4.1. The vehicle shall be started up by the means provided for normal use to the driver. The first cycle starts on the initiation of the vehicle start-up procedure.

3.1.3.4.2. Sampling shall begin (BS) before or at the initiation of the vehicle start up procedure and end on conclusion of the final idling period in the extra-urban cycle (Part Two, end of sampling (ES)).

3.1.3.4.3. The vehicle shall be driven according to Annex 4a, or in case of special gear shifting strategy according to the manufacturer's instructions, as incorporated in the drivers' handbook of production vehicles and indicated by a technical gear shift instrument (for drivers information). For these vehicles the gear shifting points prescribed in Annex 4a are not applied. For the pattern of the operating curve the description according to paragraph 6.1.3.2. of Annex 4a shall apply.

3.1.3.4.4. The exhaust gases shall be analyzed according to Annex 4a.

3.1.3.5. The test results shall be compared to the limits prescribed in paragraph 5.3.1.4. of this Regulation and the average emission of each pollutant for Condition B shall be calculated (M2i). The test results M2i, multiplied by the appropriate deterioration and Ki factors, shall be less than the limits prescribed in paragraph 5.3.1.4. of this Regulation.

3.1.4. Test results

3.1.4.1. In the case of testing according to paragraph 3.1.2.5.2.1.

. For communication, the weighted values shall be calculated as below:

Mi = (De • M1i + Dav •. M2i )/(De + Dav)

Where:
Mi	=	mass emission of the pollutant i in grams per kilometre,
M1i	=	average mass emission of the pollutant i in grams per kilometre with a fully charged electrical energy/power storage device calculated in paragraph 3.1.2.5.5.,
M2i	=	average mass emission of the pollutant i in grams per kilometre with an electrical energy/power storage device in minimum state of charge (maximum discharge of capacity) calculated in paragraph 3.1.3.5.,
De	=	vehicle electric range, according to the procedure described in Regulation No. 101, Annex 9, where the manufacturer must provide the means for performing the measurement with the vehicle running in pure electric mode,
Dav	=	25 km (average distance between two battery recharges).

3.1.4.2. In the case of testing according to paragraph 3.1.2.5.2.2.

For communication, the weighted values shall be calculated as below:

Mi = (Dovc • M1i + Dav • M2i )/(Dovc + Dav)

Where:
Mi	=	mass emission of the pollutant i in grams per kilometre,
M1i	=	average mass emission of the pollutant i in grams per kilometre with a fully charged electrical energy/power storage device calculated in paragraph 3.1.2.5.5.,
M2i	=	average mass emission of the pollutant i in grams per kilometre with an electrical energy/power storage device in minimum state of charge (maximum discharge of capacity) calculated in paragraph 3.1.3.5.,
Dovc	=	OVC range according to the procedure described in Regulation No. 101, Annex 9.
Dav	=	25 km (average distance between two battery recharges).

3.2. Externally chargeable (OVC HEV) with an operating mode switch

3.2.1. Two tests shall be performed under the following conditions:

3.2.1.1. Condition A: Test shall be carried out with a fully charged electrical energy/power storage device.

3.2.1.2. Condition B: Test shall be carried out with an electrical energy/power storage device in minimum state of charge (maximum discharge of capacity).

3.2.1.3. The operating mode switch shall be positioned according the table below:

Hybrid-modes	- Pure electric - Hybrid	- Pure fuel consuming - Hybrid	- Pure electric - Pure fuel consuming - Hybrid	- Hybrid mode n1 … - Hybrid mode m1
Battery state of charge	- Pure electric - Hybrid	- Pure fuel consuming - Hybrid	- Pure electric - Pure fuel consuming - Hybrid	- Hybrid mode n1 … - Hybrid mode m1
Battery state of charge	Switch in position	Switch in position	Switch in position	Switch in position
Condition A Fully charged	Hybrid	Hybrid	Hybrid	Most electric hybrid mode2
Condition B Min. state of charge	Hybrid	Fuel consuming	Fuel consuming	Most fuel consuming mode3

Notes:

1 For instance: sport, economic, urban, extra-urban position ...

2 Most electric hybrid mode:

The hybrid mode which can be proven to have the highest electricity consumption of all selectable hybrid modes when tested in accordance with condition A of paragraph 4. of Annex 10 to Regulation No. 101, to be established based on information provided by the manufacturer and in agreement with the technical service.

3 Most fuel consuming mode:

The hybrid mode which can be proven to have the highest fuel consumption of all selectable hybrid modes when tested in accordance with condition B of paragraph 4. of Annex 10 to Regulation No. 101, to be established based on information provided by the manufacturer and in agreement with the technical service.

3.2.2. Condition A

3.2.2.1. If the pure electric range of the vehicle is higher than one complete cycle, on the request of the manufacturer, the Type I test may be carried out in pure electric mode. In this case, engine preconditioning prescribed in paragraph 3.2.2.3.1. or 3.2.2.3.2. can be omitted.

3.2.2.2. The procedure shall start with the discharge of the electrical energy/power storage device of the vehicle while driving with the switch in pure electric position (on the test track, on a chassis dynamometer, etc.) at a steady speed of 70 per cent ±5 per cent of the maximum thirty minutes speed of the vehicle (determined according to Regulation No. 101).

Stopping the discharge occurs:

(a) When the vehicle is not able to run at 65 per cent of the maximum thirty minutes speed; or

(b) When an indication to stop the vehicle is given to the driver by the standard on-board instrumentation; or

If the vehicle is not equipped with a pure electric mode, the electrical energy/power storage device discharge shall be achieved by driving the vehicle (on the test track, on a chassis dynamometer, etc.):

(a) At a steady speed of 50 km/h until the fuel consuming engine of the HEV starts up; or

(b) If a vehicle cannot reach a steady speed of 50 km/h without starting up the fuel consuming engine, the speed shall be reduced until the vehicle can run a lower steady speed where the fuel consuming engine does not start up for a defined time/distance (to be specified between technical service and manufacturer); or

The fuel consuming engine shall be stopped within 10 seconds of it being automatically started.

3.2.2.3. Conditioning of vehicle

3.2.2.3.1. For compression-ignition engined vehicles the Part Two cycle described in Table 2 (and Figure 3) of Annex 4a shall be used. Three consecutive cycles shall be driven according to paragraph 3.2.2.6.3. below.

3.2.2.3.2. Vehicles fitted with positive-ignition engines shall be preconditioned with one Part One and two Part Two driving cycles according to paragraph 3.2.2.6.3. below.

3.2.2.4. After this preconditioning, and before testing, the vehicle shall be kept in a room in which the temperature remains relatively constant between 293 and 303 K (20 °C and 30 °C). This conditioning shall be carried out for at least six hours and continue until the engine oil temperature and coolant, if any, are within ±2 K of the temperature of the room, and the electrical energy/power storage device is fully charged as a result of the charging prescribed in paragraph 3.2.2.5.

3.2.2.5. During soak, the electrical energy/power storage device shall be charged:

(a) With the on board charger if fitted; or

(b) With an external charger recommended by the manufacturer, using the normal overnight charging procedure.

This procedure excludes all types of special charges that could be automatically or manually initiated like, for instance, the equalisation charges or the servicing charges.

The manufacturer shall declare that during the test, a special charge procedure has not occurred.

3.2.2.6. Test procedure

3.2.2.6.1. The vehicle shall be started up by the means provided for normal use to the driver. The first cycle starts on the initiation of the vehicle start-up procedure.

3.2.2.6.2. The test procedures defined in either paragraph 3.2.2.6.2.1. or 3.2.2.6.2.2. may be used in line with the procedure chosen in Regulation No. 101, Annex 8, paragraph 4.2.4.2.

3.2.2.6.2.1. Sampling shall begin (BS) before or at the initiation of the vehicle start up procedure and end on conclusion of the final idling period in the extra-urban cycle (Part Two, end of sampling (ES)).

3.2.2.6.2.2. Sampling shall begin (BS) before or at the initiation of the vehicle start up procedure and continue over a number of repeat test cycles. It shall end on conclusion of the final idling period in the first extra-urban (Part Two) cycle during which the battery has reached the minimum state of charge according to the criterion defined below (end of sampling (ES)).

The battery minimum state of charge is considered to have been reached in combined cycle N if the electricity balance measured during combined cycle N+1 is not more than a 3 per cent discharge, expressed as a percentage of the nominal capacity of the battery (in Ah) in its maximum state of charge, as declared by the manufacturer. At the manufacturer's request additional test cycles may be run and their results included in the calculations in paragraphs 3.2.2.7. and 3.2.4.3. provided that the electricity balance for each additional test cycle shows less discharge of the battery than over the previous cycle.

In between each of the cycles a hot soak period of up to 10 minutes is allowed. The power train shall be switched off during this period.

3.2.2.6.3. The vehicle shall be driven according to Annex 4a, or in case of special gear shifting strategy, according to the manufacturer's instructions, as incorporated in the drivers' handbook of production vehicles and indicated by a technical gear shift instrument (for drivers' information). For these vehicles the gear shifting points prescribed in Annex 4a are not applied. For the pattern of the operating curve the description according to paragraph 6.1.3. of Annex 4a shall apply.

3.2.2.6.4. The exhaust gases shall be analysed according to Annex 4a.

3.2.2.7. The test results shall be compared to the limits prescribed in paragraph 5.3.1.4. of this Regulation and the average emission of each pollutant in grams per kilometre for Condition A shall be calculated (M1i).

In the case of testing according to paragraph 3.2.2.6.2.1., (M1i) is simply the result of the single combined cycle run.

In the case of testing according to paragraph 3.2.2.6.2.2., the test result of each combined cycle run M1ia, multiplied by the appropriate deterioration and Ki factors, shall be less than the limits prescribed in paragraph 5.3.1.4. of this Regulation. For the purposes of the calculation in paragraph 3.2.4., M1i shall be defined as:

Where:

i: pollutant

a: cycle

3.2.3. Condition B

3.2.3.1. Conditioning of vehicle

3.2.3.1.1. For compression-ignition engined vehicles the Part Two cycle described in Table 2 and Figure 2 of Annex 4a shall be used. Three consecutive cycles shall be driven according to paragraph 3.2.3.4.3. below.

3.2.3.1.2. Vehicles fitted with positive-ignition engines shall be preconditioned with one Part One and two Part Two driving cycles according to paragraph 3.2.3.4.3. below.

3.2.3.2. The electrical energy/power storage device of the vehicle shall be discharged according to paragraph 3.2.2.2.

3.2.3.3. After this preconditioning, and before testing, the vehicle shall be kept in a room in which the temperature remains relatively constant between 293 and 303 K (20 °C and 30 °C). This conditioning shall be carried out for at least six hours and continue until the engine oil temperature and coolant, if any, are within ±2 K of the temperature of the room.

3.2.3.4. Test procedure

3.2.3.4.1. The vehicle shall be started up by the means provided for normal use to the driver. The first cycle starts on the initiation of the vehicle start-up procedure.

3.2.3.4.2. Sampling shall begin (BS) before or at the initiation of the vehicle start up procedure and end on conclusion of the final idling period in the extra-urban cycle (Part Two, end of sampling (ES)).

3.2.3.4.3. The vehicle shall be driven according to Annex 4a, or in case of special gear shifting strategy, according to the manufacturer's instructions, as incorporated in the drivers' handbook of production vehicles and indicated by a technical gear shift instrument (for drivers' information). For these vehicles the gear shifting points prescribed in Annex 4a are not applied. For the pattern of the operating curve the description according to paragraph 6.1.3. of Annex 4a shall apply.

3.2.3.4.4. The exhaust gases shall be analysed according to provisions in Annex 4a.

3.2.3.5. The test results shall be compared to the limits prescribed in paragraph 5.3.1.4. of this Regulation and the average emission of each pollutant for Condition B shall be calculated (M2i). The test results M2i, multiplied by the appropriate deterioration and Ki factors, shall be less than the limits prescribed in paragraph 5.3.1.4. of this Regulation.

3.2.4. Test results

3.2.4.1. In the case of testing according to paragraph 3.2.2.6.2.1.

For communication, the weighted values shall be calculated as below:

Mi = ( De • M1i + Dav • M2i ) / ( De + Dav )

Where:
Mi	=	mass emission of the pollutant i in grams per kilometre,
M1i	=	average mass emission of the pollutant i in grams per kilometre with a fully charged electrical energy/power storage device calculated in paragraph 3.2.2.7,
M2i	=	average mass emission of the pollutant i in grams per kilometre with an electrical energy/power storage device in minimum state of charge (maximum discharge of capacity) calculated in paragraph 3.2.3.5,
De	=	vehicle electric range with the switch in pure electric position, according to the procedure described in Regulation No. 101, Annex 9. If there is not a pure electric position, the manufacturer must provide the means for performing the measurement with the vehicle running in pure electric mode.
Dav	=	25 km (average distance between two battery recharge).

3.2.4.2. In the case of testing according to paragraph 3.2.2.6.2.2.

For communication, the weighted values shall be calculated as below

Mi = (Dovc • M1i + Dav • M2i)/(Dovc + Dav)

Where:
Mi	=	mass emission of the pollutant i in grams per kilometre,
M1i	=	average mass emission of the pollutant i in grams per kilometre with a fully charged electrical energy/power storage device calculated in paragraph 3.2.2.7.,
M2i	=	average mass emission of the pollutant i in grams per kilometre with an electrical energy/power storage device in minimum state of charge (maximum discharge of capacity) calculated in paragraph 3.2.3.5.,
Dovc	=	OVC range according to the procedure described in Regulation No. 101, Annex 9,
Dav	=	25 km (average distance between two battery recharges).

3.3. Not externally chargeable (not-OVC HEV) without an operating mode switch

3.3.1. These vehicles shall be tested according to Annex 4a.

3.3.2. For preconditioning, at least two consecutive complete driving cycles (one Part One and one Part Two) are carried out without soak.

3.3.3. The vehicle shall be driven according to Annex 4a, or in case of special gear shifting strategy according to the manufacturer's instructions, as incorporated in the drivers' handbook of production vehicles and indicated by a technical gear shift instrument (for drivers information). For these vehicles the gear shifting points prescribed in Annex 4a are not applied. For the pattern of the operating curve the description according to paragraph 6.1.3. of Annex 4a shall apply.

3.4. Not externally chargeable (not-OVC HEV) with an operating mode switch

3.4.1. These vehicles are preconditioned and tested in hybrid mode according to Annex 4a. If several hybrid modes are available, the test shall be carried out in the mode that is automatically set after turn on of the ignition key (normal mode). On the basis of information provided by the manufacturer, the Technical Service will make sure that the limit values are met in all hybrid modes.

3.4.2. For preconditioning, at least two consecutive complete driving cycles (one Part One and one Part Two) shall be carried out without soak.

3.4.3. The vehicle shall be driven according to Annex 4a, or in case of special gear shifting strategy according to the manufacturer's instructions, as incorporated in the drivers' handbook of production vehicles and indicated by a technical gear shift instrument (for drivers information). For these vehicles the gear shifting points prescribed in or Annex 4a are not applied. For the pattern of the operating curve the description according to paragraph 6.1.3.2. of Annex 4a shall apply.

4. Type II Test methods

4.1. The vehicles shall be tested according to Annex 5 with the fuel consuming engine running. The manufacturer shall provide a "service mode" that makes execution of this test possible.

If necessary, the special procedure provided for in paragraph 5.1.6. to the Regulation shall be used.

5. Type III Test methods

5.1. The vehicles shall be tested according to Annex 6 with the fuel consuming engine running. The manufacturer shall provide a "service mode" that makes execution of this test possible.

5.2. The tests shall be carried out only for conditions 1 and 2 of the paragraph 3.2. of Annex 6. If for any reasons it is not possible to test on condition 2, alternatively another steady speed condition (with fuel consuming engine running under load) should be carried out.

6. Type IV Test methods

6.1. The vehicles shall be tested according to Annex 7.

6.2. Before starting the test procedure (paragraph 5.1. of Annex 7), the vehicles shall be preconditioned as follows:

6.2.1. For OVC vehicles:

6.2.1.1. OVC vehicles without an operating mode switch: the procedure shall start with the discharge of the electrical energy/power storage device of the vehicle while driving (on the test track, on a chassis dynamometer, etc.):

(a) At a steady speed of 50 km/h until the fuel consuming engine of the HEV starts up; or

(b) If a vehicle cannot reach a steady speed of 50 km/h without starting up the fuel consuming engine, the speed shall be reduced until the vehicle can run a lower steady speed where the fuel consuming engine just does not start up for a defined time/distance (to be specified between Technical Service and manufacturer); or

The fuel consuming engine shall be stopped within 10 seconds of it being automatically started.

6.2.1.2. OVC vehicles with an operating mode switch: the procedure shall start with the discharge of the electrical energy/power storage device of the vehicle while driving with the switch in pure electric position (on the test track, on a chassis dynamometer, etc.) at a steady speed of 70 per cent ±5 per cent from the maximum thirty minutes speed of the vehicle.

Stopping the discharge occurs:

(a) When the vehicle is not able to run at 65 per cent of the maximum thirty minutes speed; or

(b) When an indication to stop the vehicle is given to the driver by the standard on-board instrumentation; or

If the vehicle is not equipped with a pure electric mode, the electrical energy/power storage device discharge shall be conducted with the vehicle driving (on the test track, on a chassis dynamometer, etc.):

(a) At a steady speed of 50 km/h until the fuel consuming engine of the HEV starts up; or

The engine shall be stopped within 10 seconds of it being automatically started.

6.2.2. For NOVC vehicles:

6.2.2.1. NOVC vehicles without an operating mode switch: the procedure shall start with a preconditioning of at least two consecutive complete driving cycles (one Part One and one Part Two) without soak.

6.2.2.2. NOVC vehicles with an operating mode switch: the procedure shall start with a preconditioning of at least two consecutive complete driving cycles (one Part One and one Part Two) without soak, performed with the vehicle running in hybrid mode. If several hybrid modes are available, the test shall be carried out in the mode which is automatically set after turn on of the ignition key (normal mode).

6.3. The preconditioning drive and the dynamometer test shall be carried out according to paragraphs 5.2. and 5.4. of Annex 7:

6.3.1. For OVC vehicles: under the same conditions as specified by condition B of the Type I test (paragraphs 3.1.3. and 3.2.3.).

6.3.2. For NOVC vehicles: under the same conditions as in the Type I test.

7. Type V Test methods

7.1. The vehicles shall be tested according to Annex 9.

7.2. For OVC vehicles:

It is allowed to charge the electrical energy/power storage device twice a day during mileage accumulation.

For OVC vehicles with an operating mode switch, mileage accumulation should be driven in the mode which is automatically set after turn on of the ignition key (normal mode).

During the mileage accumulation a change into another hybrid mode is allowed if necessary in order to continue the mileage accumulation after agreement of the Technical Service.

The measurements of emissions of pollutants shall be carried out under the same conditions as specified by condition B of the Type I test (paragraphs 3.1.3. and 3.2.3.).

7.3. For NOVC vehicles:

For NOVC vehicles with an operating mode switch, mileage accumulation shall be driven in the mode which is automatically set after turn on of the ignition key (normal mode).

The measurements of emissions of pollutants shall be carried out in the same conditions as in the Type I test.

8. Type VI Test methods

8.1. The vehicles shall be tested according to Annex 8.

8.2. For OVC vehicles, the measurements of emissions of pollutants shall be carried out under the same conditions as specified for condition B of the Type I test (paragraphs 3.1.3. and 3.2.3.).

8.3. For NOVC vehicles, the measurements of emissions of pollutants shall be carried out under the same conditions as in the Type I test.

9. On board diagnostics (OBD) Test methods

9.1. The vehicles shall be tested according to Annex 11.

9.2. For OVC vehicles, the measurements of emissions of pollutants shall be carried out under the same conditions as specified for condition B of the Type I test (paragraphs 3.1.3. and 3.2.3.).

9.3. For NOVC vehicles, the measurements of emissions of pollutants shall be carried out under the same conditions as in the Type I test.

[*] * Former title of the Agreement: Agreement Concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition of Approval for Motor Vehicle Equipment and Parts, done at Geneva on 20 March 1958.

[1] As defined in Annex 7 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), (document TRANS/WP.29/78/Rev.1/Amend.2 as last amended by Amend.4).

[2] Approval A cancelled. The 05 series of amendments to this Regulation prohibit the use of leaded petrol.

[3] As defined in Annex 7 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), (document TRANS/WP.29/78/Rev.1/Amend.2 as last amended by Amend.4).

[4] 1 for Germany, 2 for France, 3 for Italy, 4 for the Netherlands, 5 for Sweden, 6 for Belgium, 7 for Hungary, 8 for the Czech Republic, 9 for Spain, 10 for Serbia and Montenegro, 11 for the United Kingdom, 12 for Austria, 13 for Luxembourg, 14 for Switzerland, 15 (vacant), 16 for Norway, 17 for Finland, 18 for Denmark, 19 for Romania, 20 for Poland, 21 for Portugal, 22 for the Russian Federation, 23 for Greece, 24 for Ireland, 25 for Croatia, 26 for Slovenia, 27 for Slovakia, 28 for Belarus, 29 for Estonia, 30 (vacant), 31 for Bosnia and Herzegovina, 32 for Latvia, 33 (vacant), 34 for Bulgaria, 35 (Kazakhstan), 36 for Lithuania, 37 for Turkey, 38 (vacant), 39 for Azerbaijan, 40 for The former Yugoslav Republic of Macedonia, 41 (vacant), 42 for the European Community (Approvals are granted by its Member States using their respective ECE symbol), 43 for Japan, 44 vacant), 45 for Australia, 46 for Ukraine, 47 for South Africa, 48 for New Zealand, 49 for Cyprus, 50 for Malta, 51 for the Republic of Korea, 52 for Malaysia, 53 for Thailand, 54 and 55 (vacant), 56 for Montenegro, 57 (Vacant) and 58 for Tunisia..Subsequent numbers shall be assigned to other countries in the chronological order in which they ratify or accede to the Agreement Concerning the Adoption of Uniform Technical Prescriptions for Wheeled Vehicles, Equipment and Parts which can be Fitted and/or be Used on Wheeled Vehicles and the Conditions for Reciprocal Recognition of Approvals Granted on the Basis of these Prescriptions, and the numbers thus assigned shall be communicated by the Secretary-General of the United Nations to the Contracting Parties to the Agreement.

[5] For any vehicle, the "intermediate zone" is determined as follows: The vehicle shall meet the conditions given in paragraph 3.2.1. and, in addition, the measured value for the same regulated pollutant shall be below a level that is determined from the product of the limit value for the same regulated pollutant given in Table 1 in paragraph 5.3.1.4. multiplied by a factor of 2.5.

[2] 2 For any vehicle, the "failure zone" is determined as follows: The measured value for any regulated pollutant exceeds a level that is determined from the product of the limit value for the same regulated pollutant given in Table 1 in paragraph 5.3.1.4. multiplied by a factor of 2.5.

[a] a If the means of identification of type contains characters not relevant to describe the vehicle, component or separate technical unit types covered by this information document, such characters shall be represented in the documentation by the symbol '?' (e.g. ABC??123??).

[b] b As defined in Annex 7 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), (document TRANS/WP.29/78/Rev.1/Amend.2 as last amended by Amend.4).

c Where there is one version with a normal cab and another with a sleeper cab, both sets of masses and dimensions are to be stated.

[d] d The mass of the driver and, if applicable, of the crew member is assessed at 75 kg (subdivided into 68 kg

occupant mass and 7 kg luggage mass according to ISO Standard 2416 – 1992), the fuel tank is filled to 90 per cent and the other liquid containing systems (except those for used water) to 100 per cent of the capacity s specified by the manufacturer.

e For trailers or semi-trailers, and for vehicles coupled with a trailer or a semi -trailer, which exert a significant

vertical load on the coupling device or the fifth wheel, this load, divided by standard acceleration of gravity, is included in the maximum technical permissible mass.

f In the case of non -conventional engines and systems, particulars equivalent to those referred to here shall be

supplied by the manufacturer.

* Please fill in here the upper and lower values for each variant.

** Vehicles can be fuelled with both petrol and a gaseous fuel but if the petrol system is fitted for emergency

purposes or starting only and the petrol tank cannot contain more than 15 litres of petrol, they will be regarded for the test as vehicles which can only run a gaseous fuel.

[h] h The specified particulars are to be given for any proposed variants.

[i] i As defined in Annex 7 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), (document TRANS/WP.29/78/Rev.1/Amend.2 as last amended by Amend.4).

1 Strike out what does not apply.

2 Specify the tolerance.

3 This value shall be rounded-off to the nearest tenth of a millimetre.

4 This value shall be calculated with π = 3.1416 and rounded-off to the nearest cm3.

5 Specify one or another.

[2] 1 Distinguishing number of the country which has granted/extended/refused/withdrawn approval (see approval provisions in the Regulation).

2 Strike out what does not apply.

a If the means of identification of type contains characters not relevant to describe the vehicle, component or separate technical unit types covered by this information document, such characters shall be represented in the documentation by the symbol '?' (e.g. ABC??123??).

b As defined in Annex 7 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), (document TRANS/WP.29/78/Rev.1/Amend.2 as last amended by Amend.4).

[8] For HEV, and until uniform technical provisions have been established, the manufacturer will agree with the technical service concerning the status of the vehicle when performing the test as defined in this appendix.

Clause	Amendment
Section 2, paragraph 2.5.1	The words “23 mm diameter” amended to read “23 nm diameter”
Annex 11, paragraph 3.3.3.1	The sentence “By way of derogation the requirement of monitoring the reduction in the efficiency of the catalytic converter with respect to NOx emissions shall only apply from the dates set out in paragraph 12.1.4.” is deleted.
Annex 11 – Appendix 1, paragraphs 7.1.6 and 7.1.7	References to “paragraph 3.6” amended to read “paragraph 7.6”.
Annex 11 – Appendix 1, paragraph 7.3.1	References to “paragraph 3.5” and “paragraph 3.7” amended to read “paragraph 7.5” and “paragraph 7.7” respectively.
Annex 11 – Appendix 1, paragraph 7.3.2	Reference to “paragraph 3.3.1” amended to read “paragraph 7.3.1”
Annex 11 – Appendix 1, paragraph 7.6.5	Reference to “paragraphs 3.2 and 3.3” amended to read “paragraphs 7.2 and 7.3”. Reference to “paragraphs 3.4 and 3.5” amended to read “paragraphs 7.4 and 7.5”.
Annex 11 – Appendix 1, paragraph 7.7.4	Reference to “paragraph 3.5” amended to read “paragraph 7.5”.

Cumulative number of tested vehicles (current sample size)	Pass decision threshold	Fail decision threshold
3	3.327	-4.724
4	3.261	-4.79
5	3.195	-4.856
6	3.129	-4.922
7	3.063	-4.988
8	2.997	-5.054
9	2.931	-5.12
10	2.865	-5.185
11	2.799	-5.251
12	2.733	-5.317
13	2.667	-5.383
14	2.601	-5.449
15	2.535	-5.515
16	2.469	-5.581
17	2.403	-5.647
18	2.337	-5.713
19	2.271	-5.779
20	2.205	-5.845
21	2.139	-5.911
22	2.073	-5.977
23	2.007	-6.043
24	1.941	-6.109
25	1.875	-6.175
26	1.809	-6.241
27	1.743	-6.307
28	1.677	-6.373
29	1.611	-6.439
30	1.545	-6.505
31	1.479	-6.571
32	-2.112	-2.112

Sample size (n)	Pass decision threshold (An)	Fail decision threshold (Bn)
3	-0.80381	16.64743
4	-0.76339	7.68627
5	-0.72982	4.67136
6	-0.69962	3.25573
7	-0.67129	2.45431
8	-0.64406	1.94369
9	-0.61750	1.59105
10	-0.59135	1.33295
11	-0.56542	1.13566
12	-0.53960	0.97970
13	-0.51379	0.85307
14	-0.48791	0.74801
15	-0.46191	0.65928
16	-0.43573	0.58321
17	-0.40933	0.51718
18	-0.38266	0.45922
19	-0.35570	0.40788
20	-0.32840	0.36203
21	-0.30072	0.32078
22	-0.27263	0.28343
23	-0.24410	0.24943
24	-0.21509	0.21831
25	-0.18557	0.18970
26	-0.15550	0.16328
27	-0.12483	0.13880
28	-0.09354	0.11603
29	-0.06159	0.09480
30	-0.02892	0.07493
31	0.00449	0.05629
32	0.03876	0.03876

Character	Vehicle category and class	Engine type
J	M, N1 class I.	PI CI
K	M1 to fulfill specific social needs (excluding M1G)	CI
L	N1 class II	PI CI
M	N1 class III, N2	PI CI

Reference mass of vehicle RW (kg)	Equivalent inertia	Power and load absorbed by the dynamometer at 80 km/h		Road Load Coefficients
	kg	kW	N	a (N)	b(N/kph)
RW ≤ 480	455	3.8	171	3.8	0.0261
480 < RW ≤ 540	510	4.1	185	4.2	0.0282
540 < RW ≤ 595	570	4.3	194	4.4	0.0296
595 < RW ≤ 650	625	4.5	203	4.6	0.0309
650 < RW ≤ 710	680	4.7	212	4.8	0.0323
710 < RW ≤ 765	740	4.9	221	5.0	0.0337
765 < RW ≤ 850	800	5.1	230	5.2	0.0351
850 < RW ≤ 965	910	5.6	252	5.7	0.0385
965 < RW ≤ 1080	1020	6.0	270	6.1	0.0412
1080 < RW ≤ 1190	1130	6.3	284	6.4	0.0433
1190 < RW ≤ 1305	1250	6.7	302	6.8	0.0460
1305 < RW ≤ 1420	1360	7.0	315	7.1	0.0481
1420 < RW ≤ 1530	1470	7.3	329	7.4	0.0502
1530 < RW ≤ 1640	1590	7.5	338	7.6	0.0515
1640 < RW ≤ 1760	1700	7.8	351	7.9	0.0536
1760 < RW ≤ 1870	1810	8.1	365	8.2	0.0557
1870 < RW ≤ 1980	1930	8.4	378	8.5	0.0577
1980 < RW ≤ 2100	2040	8.6	387	8.7	0.0591
2100 < RW ≤ 2210	2150	8.8	396	8.9	0.0605
2210 < RW ≤ 2380	2270	9.0	405	9.1	0.0619
2380 < RW ≤ 2610	2270	9.4	423	9.5	0.0646
2610 < RW	2270	9.8	441	9.9	0.0674

APPENDIX A

Table 1

L1

Figure 1

Table 1/1

Table 1/2

Table 4/1

Figure 4/1

Figure 4/2

Table 1

3.1.1. During the test, the test cell temperature shall be between 293 K and 303 K (20 °C and 30 °C). The absolute humidity (H) of either the air in the test cell or the intake air of the engine shall be such that:

Table 1

Table 2
Extra-urban cycle (Part Two) for the Type I test

Table 3

Figure 1

Figure 2

Figure 3

Figure 5

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Table 9/1

Figure 8/1

Figure 8/2

Figure 8/3

Limit values
		Reference mass(RM) (kg)	Mass of carbon monoxide (CO)		Mass of total hydrocarbons (THC)		Mass of non- methane hydrocarbons (NMHC)		Mass of oxides of nitrogen (NOx)		Combined mass of hydrocarbons and oxides of nitrogen (THC + NOx)		Mass of particulate matter (PM)		Number of particles (P)
		Reference mass(RM) (kg)	L1 (mg/km)		L2 (mg/km)		L3 (mg/km)		L4 (mg/km)		L2 + L3 (mg/km)		L5 (mg/km)		L6 (number/km)
Category	Class		PI	CI	PI	CI	PI	CI	PI	CI	PI	CI	PI 1	CI	PI	CI
M	-	All	1,000	500	100	-	68	-	60	180	-	230	4.5	4.5	-	6.0 x 1011
N1	I	RM ≤ 1,305	1,000	500	100	-	68	-	60	180	-	230	4.5	4.5	-	6.0 x 1011
	II	1,305 < RM ≤ 1,760	1,810	630	130	-	90	-	75	235	-	295	4.5	4.5	-	6.0 x 1011
	III	1,760 < RM	2,270	740	160	-	108	-	82	280	-	350	4.5	4.5	-	6.0 x 1011
N2	-	All	2,270	740	160	-	108	-	82	280	-	350	4.5	4.5	-	6.0 x 1011
Key: PI = Positive Ignition, CI = Compression Ignition
(1) Positive ignition particulate mass standard shall apply only to vehicles with direct injection engines.

V (km/h)	V2 (km/h)	V1 (km/h)	Mean corrected coast down time (s)
120
100
80
60
40
20

Where:
F	=	total load absorbed by the chassis dynamometer (N),
a	=	value equivalent to rolling resistance (N),
b	=	value equivalent to coefficient of air resistance (N/(km/h)2),
V	=	speed (km/h),
F80	=	load at 80 km/h (N).

Where:
F	=	load absorbed (N),
Mi	=	equivalent inertia in kg (excluding the inertial effects of the free rear roller),
Δ V	=	speed deviation in m/s (10 km/h = 2.775 m/s),
t	=	time taken by the roller to pass from 85 km/h to 75 km/h.

Where:
F	=	force at the surface of the roller(s),
I	=	total inertia of the dynamometer (equivalent inertia of the vehicle: see the table in paragraph 5.1.),
IM	=	inertia of the mechanical masses of the dynamometer,
γ	=	tangential acceleration at roller surface,
F1	=	inertia force.

I	=	Im+ F1 / 
Where:
Im		can be calculated or measured by traditional methods,
F1		can be measured on the dynamometer,
		can be calculated from the peripheral speed of the rollers.

Condition Number	Vehicle speed (km/h)
1	Idling
2	50 2 (in 3rd gear or "drive")
3	50 2 (in 3rd gear or "drive")

Condition Number	Power absorbed by the brake
1	Nil
2	That corresponding to the setting for Type I Test at 50 km/h
3	That for conditions No. 2, multiplied by a factor of 1.7

Diurnal ambient temperature profile for the calibration of the enclosure and the diurnal emission test			Alternative diurnal ambient temperature profile for the calibration of the enclosure in accordance with Annex 7, Appendix 1, paragraphs 1.2. and 2.3.9.
Time (hours)		Temperature (°Ci)	Time (hours)	Temperature (°Ci)
Calibration	Test	Temperature (°Ci)	Time (hours)	Temperature (°Ci)
13	0/24	20.0	0	35.6
14	1	20.2	1	35.3
15	2	20.5	2	34.5
16	3	21.2	3	33.2
17	4	23.1	4	31.4
18	5	25.1	5	29.7
19	6	27.2	6	28.2
20	7	29.8	7	27.2
21	8	31.8	8	26.1
22	9	33.3	9	25.1
23	10	34.4	10	24.3
24/0	11	35.0	11	23.7
1	12	34.7	12	23.3
2	13	33.8	13	22.9
3	14	32.0	14	22.6
4	15	30.0	15	22.2
5	16	28.4	16	22.5
6	17	26.9	17	24.2
7	18	25.2	18	26.8
8	19	24.0	19	29.6
9	20	23.0	20	31.9
10	21	22.0	21	33.9
11	22	20.8	22	35.1
12	23	20.2	23	3.4
			24	35.6

Time (seconds)	Engine Air/Fuel Ratio	Secondary Air Injection
1-40	Stoichiometric with load, spark timing and engine speed controlled to achieve a minimum catalyst temperature of 800 °C	None
41-45	"Rich" (A/F ratio selected to achieve a maximum catalyst temperature over the entire cycle of 890 °C or 90 °C higher than lower control temperature)	None
46-55	"Rich" (A/F ratio selected to achieve a maximum catalyst temperature over the entire cycle of 890 °C or 90 °C higher than lower control temperature)	3 % (±1%)
56-60	Stoichiometric with load, spark timing and engine speed controlled to achieve a minimum catalyst temperature of 800 °C	3 % (±1%)

Parameter	Unit	Fuel A	Fuel B	Test method
Composition:				ISO 7941
C3-content	per cent vol	30 ± 2	85 ± 2
C4-content	per cent vol	Balance1	Balance1
< C3 , >C4	per cent vol	max. 2	max. 2
Olefins	per cent vol	max. 12	max. 15
Evaporation residue	mg/kg	max. 50	max. 50	ISO 13757 or EN 15470
Water at 0C		free	free	EN 15469
Total sulphur content	mg/kg	max. 50	max. 50	EN 24260 or ASTM 6667
Hydrogen sulphide		none	none	ISO 8819
Copper strip corrosion	rating	Class 1	class 1	ISO 62512
Odour		characteristic	characteristic
Motor octane number		min. 89	min. 89	EN 589 Annex B

Characteristics	Units	Basis	Limits		Test Method
Characteristics	Units	Basis	min.	max.	Test Method
Reference fuel G20
Composition:
Methane	per cent mole	100	99	100	ISO 6974
Balance1	per cent mole	-	-	1	ISO 6974
N2	per cent mole				ISO 6974
Sulphur content	mg/m3 2	-	-	10	ISO 6326-5
Wobbe Index (net)	MJ/m3 3	48.2	47.2	49.2
Reference fuel G25
Composition:
Methane	per cent mole	86	84	88	ISO 6974
Balance1	per cent mole	-	-	1	ISO 6974
N2	per cent mole	14	12	16	ISO 6974
Sulphur content	mg/m3 2	-	-	10	ISO 6326-5
Wobbe Index (net)	MJ/m3 3	39.4	38.2	40.6

Type(s) of fuel	Reference fuels	Calculation of "r"
LPG and petrol (Approval B)	Fuel A
or LPG only (Approval D)	Fuel B
NG/biomethane and petrol (Approval B)	Fuel G 20
Or NG/biomethane only (Approval D)	Fuel G 25

APPENDIX A

Table 1

L1

Figure 1

Table 1/1

Table 1/2

Table 4/1

Figure 4/1

Figure 4/2

Table 1

3.1.1. During the test, the test cell temperature shall be between 293 K and 303 K (20 °C and 30 °C). The absolute humidity (H) of either the air in the test cell or the intake air of the engine shall be such that:

Table 1

Table 2Extra-urban cycle (Part Two) for the Type I test

Table 3

Figure 1

Figure 2

Figure 3

Figure 5

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Table 9/1

Figure 8/1

Figure 8/2

Figure 8/3

Table 2
Extra-urban cycle (Part Two) for the Type I test