GB 17691-2018/XG1-2026 Limits and measurement methods for emissions from diesel fuelled heavy-duty vehicles (CHINA VI)
1 Application scope
This standard specifies the emission limits and measurement methods for gaseous and particulate pollutants from vehicles equipped with compression-ignition engines and their engines as well as those for gaseous pollutants from vehicles equipped with natural gas (NG) or liquefied petroleum gas (LPG) fuelled positive ignition engines and their engines.
This standard is applicable to the type test, checking of conformity of production, newly produced vehicle emission supervision inspection and in-service conformity inspection of vehicles of categories M2, M3, N1, N2 and N3 equipped with compression-ignition engines and gas fuelled positive ignition engines and vehicles of category M1 with a total mass exceeding 3,500kg as well as their engines.
The type test of a complete vehicle given under this standard may be extended to its variants and versions with a reference mass above 2,380kg.
The vehicles of categories M1, M2, N1 and N2 equipped with compression-ignition engines and gas fuelled positive ignition engines which have been subjected to type test in accordance with GB 18352.6-2016 may not be subjected to type test in accordance with this standard.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document applies.
GB/T 2624 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full (IDT ISO 5176)
GB/T 3730.2 Road vehicle - Masses - Vocabulary and codes
GB/T 8190.1 Reciprocating internal combustion engines - Exhaust emission measurement - Part 1: Test-bed measurement of gaseous and particulate exhaust emissions
GB/T 15089 Classification of power-driven vehicles and trailers
GB/T 17692 Measurement methods of net power for automotive engines
GB 18047 Compressed natural gas as vehicle fuel
GB 18352.6-2016 Limits and measurement methods for emissions from light-duty vehicles (CHINA 6)
GB/T 19001 Quality management systems
GB/T 27840 Fuel consumption test methods for heavy-duty commercial vehicles
GB 30510 Fuel consumption limits for heavy-duty commercial vehicles
ISO 5725 Accuracy (trueness and precision) of measurement methods and results
ISO 7000 Graphical symbols for use on equipment - Index and synopsis
ISO 13400 Road vehicles - Diagnostic communication over Internet Protocol (DoIP)
ISO 15031 Road vehicles - Communication between vehicle and external equipment for emissions-related diagnostics
ISO 15031-3 Road vehicles - Communication between vehicle and external equipment for emissions-related diagnostics - Part 3: Diagnostic connector and related electrical circuits: specification and use
ISO 15031-7 Road vehicles - Communication between vehicle and external equipment for emissions-related diagnostics - Part 7: Data link security
ISO 15765-4 Road vehicles - Diagnostic communication over Controller Area Network (DoCAN) - Part 4: Requirements for emissions-related systems
ISO 27145 Road vehicles - Implementation of World-Wide Harmonized On-Board Diagnostics (WWH-OBD) communication requirements
SAE J1708 Serial data communication between microcomputer systems in heavy-duty vehicle applications
SAE J1939 Commercial Vehicle Control System Area Network (CAN) communication protocol
SAE J1939-13 Off-board diagnostic connector
SAE J1939-73 Application layer - Diagnostics
SAE J2186 EE data link security
ASTM E 29-06B Practice for using significant digits in test data to determine conformance with specifications
ASTM F 1471-93 Test method for air cleaning performance of a high-efficiency particulate air-filter system
EN 1822-1 High efficiency air filters (EPA, HEPA and ULPA) - Part 1: Classification, performance testing, marking
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
aging cycle
the vehicle or engine operation (speed, load, power) to be executed during the durability operation test
3.2
engine (engine family) type test
the type approval test of new product that is expected to be put on the market after completion of the design of an engine type (engine family) to verify whether the product meets the technical requirements of this standard
3.3
vehicle type test
the type approval test of new trial-manufactured product after completion of a vehicle type design to verify whether the product meets the technical requirements of this standard
3.4
auxiliary emission strategy, AES
an emission strategy that becomes active and replaces or modifies a base emission strategy for a specific purpose and in response to a specific set of ambient and/or operating conditions and only remains operational as long as those conditions exist
3.5
base emission strategy, BES
an emission strategy that is active throughout the speed and load operating range of the engine unless an AES is activated
3.6
continuous regeneration
the regeneration process of an exhaust after-treatment system that occurs either permanently or at least once per World Harmonised Transient Cycle (WHTC) hot test
3.7
crankcase
the spaces in, or external to, an engine which are connected to the oil sump by internal or external ducts through which gases and vapours can be emitted
3.8
critical emission-related components
the following components which are designed primarily for emission control: fuel supply system, intake system, exhaust after-treatment system, the engine electronic control unit (ECU) and its associated sensors and actuators, and the exhaust gas recirculation system (EGR) including all related filters, coolers, control valves and tubing
3.9
critical emission-related maintenance
the maintenance to be performed on critical emission-related components
3.10
defeat strategy
an emission strategy that does not meet the performance requirements for a base or auxiliary emission strategy as specified in this standard
3.11
deNOx system
an exhaust after-treatment system designed to reduce emissions of oxides of nitrogen (NOx) (e.g. passive and active lean NOx catalysts, NOx absorbers and selective catalytic reduction (SCR) systems)
3.12
diagnostic trouble code, DTC
a numeric or alphanumeric identifier which identifies or labels a malfunction
3.13
element of design
any element of the engine system;
any control system, including: ECU software; electronic control systems; and computer logic;
any control system calibration;
the results of any interaction of systems
3.14
emission control monitoring system
the system that ensures correct operation of the NOx control measures implemented in the engine system according to the requirements of Annex G; the emission control system means the elements of design and emission strategies developed or calibrated for the purpose of controlling emissions
3.15
emission related maintenance
the maintenance which substantially affects emissions or which is likely to affect emissions deterioration of the vehicle or the engine during normal in-use operation
3.16
emission strategy
an element or set of elements of design that is incorporated into the overall design of an engine system or vehicle and used in controlling emissions
3.17
engine after-treatment system family
a manufacturer’s grouping of engines that comply with the definition of engine family, but which are further grouped into engines utilising a similar exhaust after-treatment system
3.18
engine family
a manufacturer’s grouping of engines which through their design, as defined in Clause 8 of this standard, have similar exhaust emission characteristics
3.19
engine system
the engine, the emission control system and the communication interface (hardware and messages) between the engine system electronic control unit or units (ECU) and any other powertrain or vehicle control unit
3.20
engine start
consists of the ignition-On, cranking and start of combustion, and is completed when the engine speed reaches 150r/min below the normal, warmed-up idle speed
3.21
engine type
a category of engines which do not differ in essential engine characteristics as set out in Annex A
3.22
exhaust after-treatment system
a catalyst (oxidation, 3-way or any other), particulate filter, deNOx system, combined deNOx particulate filter, or any other emission reducing device, that is installed downstream of the engine
3.23
gaseous pollutants
the exhaust gas emissions of carbon monoxide (CO), nitrogen oxides [NOx, expressed in nitrogen dioxide (NO2) equivalent], hydrocarbons [HC, i.e. total hydrocarbons (THC), non-methane hydrocarbons (NMHC) and methane (CH4)]
3.24
general denominator
a counter indicating the number of times a vehicle has been operated, taking into account general conditions in FG.4.4
3.25
group of monitors
for the purpose of assessing the in-use performance of an OBD engine family, a set of OBD monitors used for determining the correct operation of the emission control system
3.26
ignition cycle counter
a counter indicating the number of engine starts a vehicle has experienced
3.27
in-use performance ratio, IUPR
the ratio of the number of times that the conditions have existed under which a monitor, or group of monitors, should have detected a malfunction relative to the number of driving cycles relevant for the operation of that monitor or group of monitors
3.28
low speed (nlo)
the lowest engine speed where 55% of the maximum net power occurs
Contents
Foreword iii
1 Application scope
2 Normative references
3 Terms and definitions
4 Pollution control requirements
5 Engine (Vehicle) nameplate
6 Technical requirements and tests
7 Installation on the vehicle
8 Engine family and parent engine
9 Requirements and inspection for newly produced vehicles
10 In-service conformity requirements and inspection
11 Standard implementation
Annex A (Normative) Type test materials
Annex B (Informative) Format of type test reports
Annex C (Normative) Standard cycle test procedure for engine
Annex D (Normative) Specifications of reference fuels
Annex E (Normative) Requirements to Off-Cycle Emissions (OCE) tests
Annex F (Normative) On-board diagnostic systems (OBD)
Annex G (Normative) Requirements to ensure the correct operation of NOx control measures
Annex H (Normative) Durability of engine system
Annex I (Normative) Assurance requirements and checking of conformity of production
Annex J (Normative) Technical requirements for in-service conformity
Annex K (Normative) Actual road driving measurement method (PEMS)
Annex L (Normative) Measurement method of pollutant emissions by chassis dynamometer on complete vehicle
Annex M (Normative) Specific requirements for type test of liquefied petroleum gas or natural gas fuelled engines and vehicles
Annex N (Normative) Technical requirements for diesel-gas dual-fuel engines and vehicles
Annex O (Normative) Type test of replacement exhaust after-treatment devices as separate technical units
Annex P (Normative) Access to vehicle OBD and vehicle maintenance information
Annex Q (Normative) Technical requirements and communication data formats of on-board remote emission management terminal
GB 17691-2018/XG1-2026 Limits and measurement methods for emissions from diesel fuelled heavy-duty vehicles (CHINA VI)
1 Application scope
This standard specifies the emission limits and measurement methods for gaseous and particulate pollutants from vehicles equipped with compression-ignition engines and their engines as well as those for gaseous pollutants from vehicles equipped with natural gas (NG) or liquefied petroleum gas (LPG) fuelled positive ignition engines and their engines.
This standard is applicable to the type test, checking of conformity of production, newly produced vehicle emission supervision inspection and in-service conformity inspection of vehicles of categories M2, M3, N1, N2 and N3 equipped with compression-ignition engines and gas fuelled positive ignition engines and vehicles of category M1 with a total mass exceeding 3,500kg as well as their engines.
The type test of a complete vehicle given under this standard may be extended to its variants and versions with a reference mass above 2,380kg.
The vehicles of categories M1, M2, N1 and N2 equipped with compression-ignition engines and gas fuelled positive ignition engines which have been subjected to type test in accordance with GB 18352.6-2016 may not be subjected to type test in accordance with this standard.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document applies.
GB/T 2624 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full (IDT ISO 5176)
GB/T 3730.2 Road vehicle - Masses - Vocabulary and codes
GB/T 8190.1 Reciprocating internal combustion engines - Exhaust emission measurement - Part 1: Test-bed measurement of gaseous and particulate exhaust emissions
GB/T 15089 Classification of power-driven vehicles and trailers
GB/T 17692 Measurement methods of net power for automotive engines
GB 18047 Compressed natural gas as vehicle fuel
GB 18352.6-2016 Limits and measurement methods for emissions from light-duty vehicles (CHINA 6)
GB/T 19001 Quality management systems
GB/T 27840 Fuel consumption test methods for heavy-duty commercial vehicles
GB 30510 Fuel consumption limits for heavy-duty commercial vehicles
ISO 5725 Accuracy (trueness and precision) of measurement methods and results
ISO 7000 Graphical symbols for use on equipment - Index and synopsis
ISO 13400 Road vehicles - Diagnostic communication over Internet Protocol (DoIP)
ISO 15031 Road vehicles - Communication between vehicle and external equipment for emissions-related diagnostics
ISO 15031-3 Road vehicles - Communication between vehicle and external equipment for emissions-related diagnostics - Part 3: Diagnostic connector and related electrical circuits: specification and use
ISO 15031-7 Road vehicles - Communication between vehicle and external equipment for emissions-related diagnostics - Part 7: Data link security
ISO 15765-4 Road vehicles - Diagnostic communication over Controller Area Network (DoCAN) - Part 4: Requirements for emissions-related systems
ISO 27145 Road vehicles - Implementation of World-Wide Harmonized On-Board Diagnostics (WWH-OBD) communication requirements
SAE J1708 Serial data communication between microcomputer systems in heavy-duty vehicle applications
SAE J1939 Commercial Vehicle Control System Area Network (CAN) communication protocol
SAE J1939-13 Off-board diagnostic connector
SAE J1939-73 Application layer - Diagnostics
SAE J2186 EE data link security
ASTM E 29-06B Practice for using significant digits in test data to determine conformance with specifications
ASTM F 1471-93 Test method for air cleaning performance of a high-efficiency particulate air-filter system
EN 1822-1 High efficiency air filters (EPA, HEPA and ULPA) - Part 1: Classification, performance testing, marking
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
aging cycle
the vehicle or engine operation (speed, load, power) to be executed during the durability operation test
3.2
engine (engine family) type test
the type approval test of new product that is expected to be put on the market after completion of the design of an engine type (engine family) to verify whether the product meets the technical requirements of this standard
3.3
vehicle type test
the type approval test of new trial-manufactured product after completion of a vehicle type design to verify whether the product meets the technical requirements of this standard
3.4
auxiliary emission strategy, AES
an emission strategy that becomes active and replaces or modifies a base emission strategy for a specific purpose and in response to a specific set of ambient and/or operating conditions and only remains operational as long as those conditions exist
3.5
base emission strategy, BES
an emission strategy that is active throughout the speed and load operating range of the engine unless an AES is activated
3.6
continuous regeneration
the regeneration process of an exhaust after-treatment system that occurs either permanently or at least once per World Harmonised Transient Cycle (WHTC) hot test
3.7
crankcase
the spaces in, or external to, an engine which are connected to the oil sump by internal or external ducts through which gases and vapours can be emitted
3.8
critical emission-related components
the following components which are designed primarily for emission control: fuel supply system, intake system, exhaust after-treatment system, the engine electronic control unit (ECU) and its associated sensors and actuators, and the exhaust gas recirculation system (EGR) including all related filters, coolers, control valves and tubing
3.9
critical emission-related maintenance
the maintenance to be performed on critical emission-related components
3.10
defeat strategy
an emission strategy that does not meet the performance requirements for a base or auxiliary emission strategy as specified in this standard
3.11
deNOx system
an exhaust after-treatment system designed to reduce emissions of oxides of nitrogen (NOx) (e.g. passive and active lean NOx catalysts, NOx absorbers and selective catalytic reduction (SCR) systems)
3.12
diagnostic trouble code, DTC
a numeric or alphanumeric identifier which identifies or labels a malfunction
3.13
element of design
any element of the engine system;
any control system, including: ECU software; electronic control systems; and computer logic;
any control system calibration;
the results of any interaction of systems
3.14
emission control monitoring system
the system that ensures correct operation of the NOx control measures implemented in the engine system according to the requirements of Annex G; the emission control system means the elements of design and emission strategies developed or calibrated for the purpose of controlling emissions
3.15
emission related maintenance
the maintenance which substantially affects emissions or which is likely to affect emissions deterioration of the vehicle or the engine during normal in-use operation
3.16
emission strategy
an element or set of elements of design that is incorporated into the overall design of an engine system or vehicle and used in controlling emissions
3.17
engine after-treatment system family
a manufacturer’s grouping of engines that comply with the definition of engine family, but which are further grouped into engines utilising a similar exhaust after-treatment system
3.18
engine family
a manufacturer’s grouping of engines which through their design, as defined in Clause 8 of this standard, have similar exhaust emission characteristics
3.19
engine system
the engine, the emission control system and the communication interface (hardware and messages) between the engine system electronic control unit or units (ECU) and any other powertrain or vehicle control unit
3.20
engine start
consists of the ignition-On, cranking and start of combustion, and is completed when the engine speed reaches 150r/min below the normal, warmed-up idle speed
3.21
engine type
a category of engines which do not differ in essential engine characteristics as set out in Annex A
3.22
exhaust after-treatment system
a catalyst (oxidation, 3-way or any other), particulate filter, deNOx system, combined deNOx particulate filter, or any other emission reducing device, that is installed downstream of the engine
3.23
gaseous pollutants
the exhaust gas emissions of carbon monoxide (CO), nitrogen oxides [NOx, expressed in nitrogen dioxide (NO2) equivalent], hydrocarbons [HC, i.e. total hydrocarbons (THC), non-methane hydrocarbons (NMHC) and methane (CH4)]
3.24
general denominator
a counter indicating the number of times a vehicle has been operated, taking into account general conditions in FG.4.4
3.25
group of monitors
for the purpose of assessing the in-use performance of an OBD engine family, a set of OBD monitors used for determining the correct operation of the emission control system
3.26
ignition cycle counter
a counter indicating the number of engine starts a vehicle has experienced
3.27
in-use performance ratio, IUPR
the ratio of the number of times that the conditions have existed under which a monitor, or group of monitors, should have detected a malfunction relative to the number of driving cycles relevant for the operation of that monitor or group of monitors
3.28
low speed (nlo)
the lowest engine speed where 55% of the maximum net power occurs
Contents of GB 17691-2018/XG1-2026
Contents
Foreword iii
1 Application scope
2 Normative references
3 Terms and definitions
4 Pollution control requirements
5 Engine (Vehicle) nameplate
6 Technical requirements and tests
7 Installation on the vehicle
8 Engine family and parent engine
9 Requirements and inspection for newly produced vehicles
10 In-service conformity requirements and inspection
11 Standard implementation
Annex A (Normative) Type test materials
Annex B (Informative) Format of type test reports
Annex C (Normative) Standard cycle test procedure for engine
Annex D (Normative) Specifications of reference fuels
Annex E (Normative) Requirements to Off-Cycle Emissions (OCE) tests
Annex F (Normative) On-board diagnostic systems (OBD)
Annex G (Normative) Requirements to ensure the correct operation of NOx control measures
Annex H (Normative) Durability of engine system
Annex I (Normative) Assurance requirements and checking of conformity of production
Annex J (Normative) Technical requirements for in-service conformity
Annex K (Normative) Actual road driving measurement method (PEMS)
Annex L (Normative) Measurement method of pollutant emissions by chassis dynamometer on complete vehicle
Annex M (Normative) Specific requirements for type test of liquefied petroleum gas or natural gas fuelled engines and vehicles
Annex N (Normative) Technical requirements for diesel-gas dual-fuel engines and vehicles
Annex O (Normative) Type test of replacement exhaust after-treatment devices as separate technical units
Annex P (Normative) Access to vehicle OBD and vehicle maintenance information
Annex Q (Normative) Technical requirements and communication data formats of on-board remote emission management terminal
