PDF GB 17691-2018 English (GB 17691-2005: Older version)
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Limits and measurement methods for emissions from diesel fueled heavy-duty vehicles (CHINA VI)
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Limits and measurement methods for exhaust pollutants from compression ignition and gas fuelled positive ignition engines of vehicles (III, IV, V)
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Limits and measurement methods for exhaust pollutants from compression ignition (C. I.) engines of vehicles
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Limits and measurement method for exhaust pollutants from compression ignition (C. I.)engines and vehicles equipped with C. I. engines
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PDF Preview: GB 17691-2018 PDF Preview: GB 17691-2005
GB 17691-2018: PDF in English GB 17691-2018
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
Replacing GB 17691-2005
Limits and measurement methods for emissions from
diesel fueled heavy-duty vehicles (CHINA VI)
ISSUED ON: JUNE 22, 2018
IMPLEMENTED ON: JULY 01, 2019
Issued by: Ministry of Ecology and Environment;
State Market Regulatory Administration.
Table of Contents
State Market Regulatory Administration... 1
Foreword ... 4
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 9
4 Pollution control requirements ... 20
5 Signage of engine (vehicle) ... 23
6 Technical requirements and tests ... 24
7 Installation on vehicles ... 31
8 Family and parent engine ... 32
9 Up-to-standard requirements and inspection of new produced vehicles ... 34
10 Requirements and inspection of in-use compliance ... 36
11 Implementation of standard ... 38
Appendix A (Normative) Materials for type test ... 40
Appendix B (Informative) Format of type test report ... 64
Appendix C (Normative) Test procedure of standard cycle of engine ... 68
Appendix D (Normative) Technical requirements for reference fuels ... 242
Appendix E (Normative) Test requirements of non-standard cycle of engine
... 245
Appendix F (Normative) On-board diagnostic system (OBD) ... 256
Appendix G (Normative) Requirements for proper operation of the NOx control
system ... 347
Appendix H (Normative) Durability of engine system ... 379
Appendix I (Normative) Requirements and inspection of production consistency
assurance ... 387
Appendix J (Normative) Technical requirements of in-use compliance ... 392
Appendix K (Normative) Portable emission measurement system (PEMS) along
actual road ... 407
Appendix L (Normative) Measurement method for pollutant emission of vehicle
chassis dynamometer ... 437
Appendix M (Normative) Special requirements for type test of liquefied
petroleum gas and natural gas engines and vehicles ... 442
Appendix N (Normative) Technical requirements for diesel-gas dual-fuel
engines and vehicles ... 448
Appendix O (Normative) Type test of alternative emission aftertreatment device
as an independent assembly ... 485
Appendix P (Normative) Acquisition of vehicle OBD and vehicle maintenance
information ... 499
Appendix Q (Normative) Technical requirements and communication data
format for remote emission management on-board terminal ... 501
Limits and measurement methods for emissions from
diesel fueled heavy-duty vehicles (CHINA VI)
1 Scope
This standard specifies the emission limits and test methods for gaseous and
particulate pollutants as emitted by the vehicles equipped with compression
ignition engine and its engines, as well as the emission limits and test methods
for gaseous pollutants emitted from the ignition engine vehicles and its engine
which use natural gas (NG) or liquefied petroleum gas (LPG) as fuel.
This standard is applicable to the type test, production consistency inspection,
supervisory inspection of emission from new produced vehicle, compliance
inspection of in-use vehicle of the category M2, M3, N1, N2, N3 which is equipped
with compression ignition and gas-fueled ignition engines as well as the
category M1 vehicles which have a total mass of more than 3500 kg.
The type test of whole vehicle according to this standard may be extended to
variants and modified vehicles which have a reference mass exceeding 2380
kg.
If the category M1, M2, N1, N2 vehicles which are equipped with compression
ignition and gas-fueled ignition engines have been type-tested according to GB
18352.6-2016, they may be exempted from the type test of this standard.
2 Normative references
This standard refers to the following documents or their terms. For undated
references, the latest edition applies to this standard.
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 - Requirements
GB/T 27840 Fuel consumption test methods for heavy-duty commercial
vehicles
GB 30510 Fuel consumption limits for heavy-duty commercial vehicles
ISO 5725 Measurement method and result accuracy
ISO 7000 Equipment graphic symbol - Index and list
ISO 13400 Road vehicles - Internet protocol (DoIP)-based diagnostic
communication
ISO 15031 Road vehicles - Vehicles and emission diagnostics related
equipment communication
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 communications between microcomputer systems in
heavy-duty vehicle applications
SAE J1939 Communication protocol of local area network (CAN bus) for
commercial vehicle's control system
SAE J1939-13 External diagnostic connector
SAE J1939-73 Application layer - diagnosing
SAE J2186 Electrical/electronic (E/E) data link security
ASTM E 29-06B Standard practice for using significant digits in test data to
additional type test of engine. Except for engine test, all vehicles undergoing
type test are required to be subject to the test by the portable emission
measurement system (PEMS) as specified in 6.2.2.
4.1.1.4 Requirements for fuels of type test
4.1.1.4.1 When the parent engine is subjected to type test, it shall use the
reference fuel complying with the provisions of Appendix D of this standard.
4.1.1.4.2 For natural gas and liquefied petroleum gas engines (vehicles), it shall
use the fuel types as specified in Appendix M to carry out type test.
4.1.1.4.3 Type test of natural gas engines and LPG engines shall meet the
requirements of Tables M.1 and M.2 of Appendix M.
4.1.1.4.4 The type test of the dual-fuel engine shall meet the requirements of
Table N.2 of clause N.6.1.2.
4.1.1.4.5 If the fuel to be used in the design of the engine family is not included
in the reference fuel range specified in Appendix D, the manufacturer shall:
a) A clear description of the types of commercially available fuel that the
engine family can use.
b) Prove that the parent engine can meet the requirements of this standard
when burning commercially available fuel.
c) Prove that the engine can meet the in-use compliance requirements when
using the specified fuel in combination with any of the commercially
available fuels of any component.
4.1.2 Type test of engine family (parent engine)
4.1.2.1 When the engine is subject to type test, select a parent engine that can
represent the engine model or family. If the selected engine does not fully
represent the model or family as described in Appendix A, it shall select another
representative engine for testing.
4.1.2.2 When the whole vehicle is subject to type test, select a vehicle that can
represent the vehicle model (family) for type test. If the selected vehicle does
not fully represent the vehicle model (family) as described in clause 8.4, it shall
select another representative vehicle for testing.
4.1.2.3 The parent engine (or the base model) represents the emission level of
all engine models (vehicle models) in the family, the type test of the parent
engine (or the parent vehicle) may be extended to all members of the family.
Other members in the family do not need to be tested.
be disclosed after technical processing.
5 Signage of engine (vehicle)
5.1 General requirements
The engine's signage may be in the form of text and numbers, or in the form of
a two-dimensional code.
The signage must be concise and clear, its text, numbers or graphics shall be
clear, obvious, readable, not erased. The fixing method of the signage must be
firm throughout the life of the engine and must not be removed.
5.2 Location of engine signage
The installation position of the signage on the engine shall not hinder the normal
operation of the engine. In the service life of engine, it generally requires no
position change. In addition, when all the accessories required for engine
operation are installed, the signage shall be located where it is easy for normal
people to see.
The signage shall be close to or incorporated on the nameplate of the
manufacturer.
5.3 Contents of engine signage
The engine's signage shall contain at least the following:
a) Engine model;
b) Date of manufacture: Year, month, day ("day" is optional. If the date of
manufacture has been marked in other parts, it may not be indicated in
the signage repeatedly);
c) The words “CHINA VI”;
d) The trademark or full name of the manufacturer;
e) Emission control key components (e.g., EGR, DOC, SCR, DPF, etc.).
5.4 Special requirements for natural gas and LPG engine (vehicle)'s
signages with a defined fuel range
5.4.1 For natural gas and liquefied petroleum gas engines with a defined fuel
range during type test, in addition to meeting the requirements of 5.3, it shall
also include the following information:
a) Limited to the use of natural gas of high (low) calorific value;
6.9.1 The manufacturer shall demonstrate that under all normal conditions,
especially at low temperatures, the NOx system can maintain its emission
control function.
6.9.2 The manufacturer shall report the information on the control strategy of
the exhaust gas recirculation system (EGR) and the selective catalytic
reduction system (SCR) in a low temperature environment to the competent
department of ecological environment under the State Council. The information
shall also include a description of the impact of this system running at low
temperature system onto the emission.
6.9.3 Ensure the normal operation of the NOx control measures, meet the
requirements of Appendix G. Follow the requirements of Appendix G to conduct
test and verification.
6.10 Requirements for duel fuel engine
Dual-fuel engines or vehicles that meet the requirements of this standard and
are tested according to Appendix N.
6.11 Requirements for replacement pollution control devices
The design, manufacture and installation of the replacement pollution control
device shall achieve the performance of the original emission control device, so
that the pollutant emissions of the engine and the vehicle comply with the
provisions of this standard, thereby effectively control the pollutant emission
under normal conditions of use and throughout the full life of the vehicle.
The replacement pollution control device shall be type-tested according to the
provisions of Appendix O.
6.12 Technical requirements for whole vehicle
6.12.1 The vehicle manufacturer shall install the engine on the whole vehicle
and shall strictly follow the installation requirements specified in Chapter 7, to
ensure that the vehicle meets the non-standard cycle emission requirements
as specified in Table 4.
6.12.2 The vehicle manufacturer shall ensure that after assembling the engine
into the whole vehicle, the OBD system and the NOx control system are not
changed; meanwhile when verified according to Annex KE along actual road, it
can still meet the technical requirements as specified in clause 6.8 and clause
6.9.
6.12.2.1 The vehicle shall have an OBD diagnostic interface that meets the
requirements of ISO 15031. The diagnostic interface shall be in the vicinity of
the driver in the vehicle, in a location that is easy to find and access, marked
shall not exceed the power absorbed by the accessories as specified in
Appendix A for engines that have been type-tested.
7.1.4 The characteristics of the exhaust aftertreatment system shall be
consistent with the declarations in the engine type test in Appendix A.
7.2 Installation of type-tested engine on vehicle
An engine that is type-tested as an independent technical assembly shall meet
the following requirements when installed on a vehicle:
a) The OBD systems shall, when installed according to the requirements of
Annex FA, meet the installation requirements of the engine manufacturer
as specified in Appendix A.
b) The NOx control system shall, when installed according to the provisions
of Annex GD, meet the installation requirements of the engine
manufacturer as specified in Appendix A.
c) The dual-fuel engines that are type-tested as independent technical
assemblies shall, when installed on vehicle, also meet the requirements
of N.6.3 and N.8.2, as well as the installation requirements of engine
manufacturer as specified in Annex AA.
8 Family and parent engine
8.1 Engine family
8.1.1 Determine the parameters of engine family
The same engine family must have the basic parameters as specified in C.4.2.
For dual-fuel engines, the engine family shall also comply with the additional
requirements of N.3.1 of Appendix N.
8.1.2 Selection of parent engine
The parent engine of the family shall be selected according to the requirements
specified in C.4.3.
For dual-fuel engines, the selection of parent engine shall also meet the
additional requirements of N.3.2.
8.1.3 Expansion of engine family
8.1.3.1 If the requirements of 8.1.1 are met, it may incorporate the new engine
model into the engine family that has been type-tested.
that meets the requirements of paragraphs b) ~ d) of 8.4.1.
9 Up-to-standard requirements and inspection of new
produced vehicles
9.1 General requirements
9.1.1 Vehicle and engine manufacturers shall take measures according to
Appendix I to ensure production consistency.
9.1.2 Engine manufacturers must take measures to ensure that the engine,
system, component or independent technology assembly is consistent with the
engine type that has been type-tested.
9.1.3 The production consistency inspection shall be based on the information
disclosure materials in Appendix A and Appendix B.
9.1.4 The vehicle and engine used for the test shall be randomly selected. The
manufacturer must not make any adjustments to the taken vehicle or engine
(including updates to the ECU software).
9.1.5 The vehicle shall not run-in in principle. If the manufacturer requests it, it
can be run-in according to the running-in specifications, but it must not exceed
500 km. Meanwhile it shall not make any adjustment of the vehicle.
9.2 Up-to-standard self-inspection of new produced vehicle
9.2.1 In order to ensure that the mass-produced vehicles meet the technical
requirements as specified in clause 6.12, the vehicle manufacturer shall
formulate an off-line inspection plan for each vehicle type (family), including
inspection items, inspection methods, sampling methods, sampling ratios, etc.
9.2.2 The self-inspection of the pollutant emission of vehicle shall be tested
according to the PEMS test method of whole vehicle as specified in Appendix
K of this standard. If the vehicle is subject to the production consistency
inspection of the fuel consumption of whole vehicle according to GB 30510, it
shall carry out pollutant emission inspection according to Appendix L at the
same time.
9.2.3 The sampling method shall be statistically representative, which can
represent the emission control level of the same batch of vehicles within a
certain production cycle.
9.2.4 The vehicle manufacturer shall record and archive the vehicle inspection
test in detail. The record document shall be kept for at least 5 years. The
competent department of ecological environment may check the test records
competent department of ecological environment shall conduct sampling
inspection according to the requirements of 10.2.2.
10.2.1 Self-inspection of manufacturer
10.2.1.1 When the engine family is type-tested, the engine manufacturer shall
also formulate a self-inspection plan for in-use compliance. The self-inspection
of the engine manufacturer's in-use compliance shall be based on the engine
family.
10.2.1.2 When the vehicle model (family) is type-tested, the vehicle
manufacturer shall also establish a self-inspection plan for in-use compliance.
The vehicle manufacturer’s self-inspection for in-use compliance shall be based
on the vehicle model or vehicle family, which may cover the extended vehicle
models produced by refitted vehicle manufacturer.
10.2.1.3 The self-inspection plan for in-use compliance includes the test
schedule and sampling plan, which shall be reported to the competent
department of ecological environment under the State Council.
10.2.1.4 The engine manufacturer shall carry out the self-inspection of in-use
compliance according to the self-inspection plan, try to select the vehicles from
different vehicle manufacturers to conduct tests. The self-inspection report of
the in-use compliance of the engine family shall disclose the information,
meanwhile be used as a part of the self-inspection report of the in-use
compliance of the vehicle family of the vehicle manufacturer.
10.2.1.5 The vehicle manufacturer shall carry out the self-inspection of in-use
compliance according to the self-inspection plan, try to select different vehicle
models from the vehicle family to conduct test. The self-inspection report of in-
use compliance of the vehicle model (family) shall disclose the information.
10.2.2 Sampling inspection by competent department of ecological
environment
10.2.2.1 The competent department of ecological environment may follow the
test procedures of the in-use compliance as specified in Appendix J, to conduct
sampling inspection of the in-use compliance of the vehicle model (family).
10.2.2.2 If the competent department of ecological environment under the State
Council confirms that a certain vehicle model (family) does not meet the
requirements of this standard, the manufacturer shall take corrective measures
according to clauses 10.3 and J.5 of this standard.
10.3 Corrective measures
10.3.1 The manufacturer shall submit a plan for rectification measures to the
a) Official documents: It shall be disclosed to the competent department of
ecological environment under the State Council and may be provided to
relevant parties as needed.
b) Extended documents: It shall be kept confidential. The extension
documents shall be disclosed to the competent department of ecological
environment under the State Council or may be kept by the manufacturer.
However, it shall be ensured that these documents can be checked at any
time when the validity of the type test is being confirmed.
A.3.5.2 If all output signals are clearly represented by the matrix obtained from
the control range of the individual unit's input signals, the file shall describe the
functional operation of the drivability limit system as required by Appendix G,
including the parameters required to retrieve system-related information. The
material shall be disclosed to the competent department of ecological
environment under the State Council.
A.3.5.3 The extension document package shall include the operation
information of all auxiliary emission control strategy (AES) and basic emission
control strategy (BES), including description of AES revision parameters, AES
working boundary conditions, descriptions on possible startup of AES and BES
under the test conditions as specified in Appendix E. The extension document
shall also contain the descriptions on the control logic of the fuel system, timing
strategy, switching points during all operating conditions. It shall also include a
complete description of the drivability limitation system as required in Appendix
G, including related monitoring strategies.
A.3.6 For engine models or families that are type-tested as independent
technical assemblies, it shall also submit the following materials:
a) For ignition engines, as described in Appendix C, if misfire occurs from the
beginning of the emission and causes the engine's emissions to exceed
the limits as specified in Appendix F, or causes the exhaust catalyst to
overheat and eventually causes irreparable damage, the manufacturer
shall declare the minimum misfire rate in all above misfire events;
b) Instructions for preventing tampering and modification of the emission
control electronics unit, including preventing the renewal of equipment
approved or calibrated by the manufacturer;
c) The OBD document which complies with the requirements of F.8;
d) The OBD-related information provided for access of OBD shall comply
with the requirements of Appendix P of this standard;
e) Declare compliance with non-standard cyclic emissions according to the
requirements of 6.4.3 and the template of Appendix E;
requirements of CB.2. The technical indicators of the measurement system
shall comply with the requirements of clause CB.3 (measurement of gaseous
pollutants), clause CB.4 (measurement of particulate pollutants), Annex CE.
If other systems or analyzers are able to obtain the equivalent results as
described in C.3.2, the testing agency may approve them.
C.3.2 Equivalent system
To determine the equivalence between an equivalent system and a system of
this Appendix, it shall be confirmed on the basis of a correlation study of at least
seven pairs of samples.
The result is the specific emission value of the cycle. The comparison test shall
be carried out in the same laboratory, on the same test bench, on the same
engine, preferably at the same time. Under the test bench and engine
conditions of the laboratory as described above, the equivalency of the
sample's mean values is obtained from the F-test and t-test statistics as
described in clause CF.3. Outlier data is determined according to ISO 5725 and
removed from the database. The system used for the comparison test shall be
reported to the competent department of ecological environment under the
State Council.
C.4 Engine family
C.4.1 Overview
The design parameters are characteristics of a certain engine family. All
engines of the family members have these parameters. Engine manufacturers
may determine which engines belong to a family according to the criteria of the
family members in clause C.4.2.
The manufacturer shall submit to the State Council's competent department of
ecological environment the reasonable information on the emission level of the
engine family members.
C.4.2 Parameters of engine family
When determining the engine family, certain design parameters may interact
with each other under certain conditions. It shall ensure that only engines with
similar emissions characteristics can be included in the same engine family.
The manufacturer shall confirm this situation and report to the competent
department of ecological environment under the State Council. This can be
used as a standard for building a new engine family.
If the devices and characteristics as not listed in this clause seriously affect
emissions, the manufacturer shall identify the device based on good
it is a parent engine or a family member engine, if the same aftertreatment
system as the parent engine is installed, the engine must not be assigned to
the same engine family without the aftertreatment system.
C.4.3 Selection of parent engine
C.4.3.1 Compression ignition engine
The parent engine of the engine family shall be selected based on the preferred
principle of maximum fuel supply per stroke at the maximum torque speed. If
there are two or more engines complying with the preferred standard, it shall
use the maximum fuel supply per stroke at the rated speed as the secondary
principle for selecting parent engine.
C.4.3.2 Spark ignition engine
The parent engine in the family shall be selected according to the preferred
principle of maximum displacement. If two or more engines are according to the
preferred principle, the parent engine shall be selected according to the
following order of secondary selection:
a) Maximum fuel supply per stroke at rated power speed
b) Maximum ignition timing
c) Minimum EGR rate
C.4.3.3 Supplementary provisions for parent engine selection
In some cases, the inspection agency may add a second engine to conduct
emission test according to the technical data as provided by the engine
manufacturer, to facilitate determining the worst emission level of the engine in
the family.
If the engine in the family has other variable characteristics that can affect the
exhaust pollutants, these characteristics shall also be taken into account when
selecting the parent engine.
C.5 Test conditions
C.5.1 Laboratory test conditions
It shall measure the absolute temperature of the air at the engine inlet (Ta,
expressed in Kelvin) and dry air pressure (Ps, expressed in kPa). For multi-
cylinder engines with multiple sets of intake manifolds, such as “V-type” engines,
it shall measure the average temperature of each group of intake manifolds. It
shall follow the requirements below to determine the laboratory atmospheric
factors fα, which shall be recorded together with the test result. When fα meets
The engine shall be tested by installing accessories and equipment required by
the Annex CG.
If the engine accessories cannot be installed as required, the power of the
accessories shall be calculated according to the provisions of C.5.3.2 to C.5.3.5.
C.5.3.2 Accessories/equipment to be installed for testing
If the accessories to be installed according to the requirements of Annex CG
are not installed during the test, the power (reference and actual power) as
absorbed by these accessories shall be subtracted from the test.
C.5.3.3 Accessories/equipment that do not need to be installed for testing
If the accessories that shall not be installed according to the requirements of
Annex CG cannot be removed during the test, the power (reference and actual
power) as absorbed by these accessories shall be added during the test. If the
total power as absorbed by these accessories is more than 3% of the maximum
net power, the manufacturer shall provide a written description.
C.5.3.4 Determination of accessory power
In case:
a) As required by the Annex CG, the accessories/equipment that shall be
installed on the engine are not......
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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