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GB 21670-2008 PDF in English

GB 21670-2008 (GB21670-2008) PDF English
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GB 21670-2008: PDF in English

GB 21670-2008
ICS 43.040.40
T 24
P GB 21670-2008
Technical Requirements and Testing Methods
for Passenger Car Braking Systems
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine (AQSIQ);
Standardization Administration of China (SAC).
Table of Contents
1 Scope ... 6 
2 Normative References ... 6 
3 Terms and Definitions ... 6 
3.1 Basic Terms and Definitions ... 6 
3.2 Terms and Definitions for Complex Electronic Vehicle Control System ... 11 
4 Structure and Function Requirements ... 12 
4.1 Braking Equipment ... 12 
4.2 Characteristics of Braking Systems ... 13 
5 Test conditions and performance requirements ... 22 
5.1 Testing Conditions ... 22 
5.2 Performance Requirements ... 26 
5.3 Response Time ... 28 
5.4 Provisions Relating to Energy Sources and Energy Storage Devices (Energy
Accumulators) -- Hydraulic Braking Systems with Stored Energy ... 28 
5.5 Distribution of Braking among the Axles of Vehicles ... 29 
5.6 Test Requirements for Vehicles Fitted with Anti-Lock Systems (ABS) ... 33 
6 Vehicle Type Approval and Expansion ... 39 
6.1 Vehicle Type Approval ... 39 
6.2 Expansion of approved vehicle type ... 40 
7 Test Methods ... 40 
7.1 Test Site and Equipment ... 41 
7.2 Test Vehicles ... 41 
7.3 Static Inspection ... 41 
7.4 Dynamic Test ... 51 
Appendix A (Normative) Symbols and Definitions ... 64 
Appendix B (Normative) Monitoring Regulation for SOC of Traction Battery ... 67 
Appendix C (Normative) Inertia Dynamometer Test Method for Brake Linings ... 68 
Appendix D (Normative) Special Requirements to be Applied to the Safety Aspects of
All provisions of this standard are compulsory.
This standard is not equivalent to ECE Regulation R13-H "Uniform Provisions
Concerning the Approval of Passenger Cars with Regard to Braking" in consistency degree.
Compared with ECE R 13-H, there are technical differences and main editorial changes as
-- Delete the content relevant to type approval specified in Appendix 1 and Appendix 2 of
ECE R 13-H;
-- Integrate Appendix 3, Appendix 4, Appendix 5 and Appendix 6 of ECE R 13-H into the
text part of this standard;
-- Considering part of vehicles with lower maximum design speed cannot reach the
specified test speed due to limitation in acceleration performance, such vehicles may be
applied with Type-0 test for engine disconnected at the maximum speed that they can
-- Add the requirements in "vehicle type approval and expansion";
-- Provide complete test methods;
-- Symbols and definitions involved in this standard are summarized as Appendix A;
-- Use Appendix 1 of Annex 3 in ECE R 13-H as Appendix B of this standard;
-- Use Annex 7 in ECE R 13-H as Appendix C of this standard;
-- Use Annex 8 in ECE R 13-H as Appendix D of this standard;
-- Provide the requirements on recommended test report and figures/tables relevant in
Appendix E.
Vehicles approved to this standard firstly shall implement this standard on the
implementation date of this standard; and the vehicles being manufactured shall implement
this standard after 12 months from the implementation date.
Prior to the implementation of the revised edition to GB 12676-1999, vehicles of
categories M1 may use one of this Standard and GB 12676-1999.
Appendix A, Appendix B, Appendix C and Appendix D of this standard are normative,
and Appendix E is informative.
This standard was proposed by the National Development and Reform Commission.
This standard shall be under the jurisdiction of the National Technical Committee 114 on
Road Vehicles of Standardization Administration of China (SAC/TC 114).
Chief Drafting Organizations. China Automotive Technology & Research Center,
Dongfeng Honda Motor Co., Ltd., FAW TOYOTA Motor Co., Ltd., Shanghai Volkswagen
Motor Co., Ltd., Chery Motor Co., Ltd., Guangzhou Honda Motor Co., Ltd., Beijing Hyundai
Motor Co., Ltd., Huachen BMW Auto Co., Ltd.
Participating drafting organizations. China Chongqing Automobile Research Institute,
Hainan Automobile Research Institute, Changan Auto (Group) Co., Ltd., Hafei Auto Co., Ltd.,
Jingling Auto Co., Ltd.
Chief drafting staffs. Jin Yuefu, Wang Zhao, Liu Di, Xie Jinzhong, Geng Lei, Li Puming,
Yuan Yongbin, Zhang Shanqian
Participating drafting staffs. Tang Yuejin, Gao Quanjun, Gao Xiang, Song Xuan, Dong
Bo, Chen Zhenri, Luo Chunyan, Zhang Huabin, Wan Faming
Technical Requirements and Testing Methods
for Passenger Car Braking Systems
1 Scope
This standard specifies the structure, performance and test methods for braking system of
passenger cars (vehicle).
This standard is applicable to vehicles of category M1 as specified by GB/T 15089.
2 Normative References
The following standards contain the provisions which, through reference in this text,
constitute the provisions of this standard. For dated reference, the subsequent amendments
(excluding corrigendum) or revisions of these publications do not apply. However, the parties
who enter agreement according to these specifications are encouraged to study whether the
latest editions of these references are applicable. For undated references, the latest edition of
the normative document is applicable to these specifications.
GB 4094 Motor Vehicles-Symbols for Controls, Indicators and Tell-tales [GB 4094-1999,
eqv 93/91/EEC (78/316/EEC)]
GB/T 5620 Road vehicles -- Braking of automotive vehicles and their trailers --
Vocabulary (GB/T 5620-2002, idt ISO 611. 1994)
GB 12981 Motor vehicle brake fluids (GB 12981-2003, ISO 4925. 1978, MOD)
GB/T 14168 Motor vehicles -- Graphical symbols to designate brake fluid types (GB/T
14168-1993, eqv ISO 9128. 1987)
GB/T 15089 Classification of Power-driven Vehicles and Trailers
GB/T 17619 Limits and methods of testing for immunity of electrical / electronic
sub-assemblies in vehicles to electromagnetic radiation
GB 18655 Vehicles boats and internal combustion engines -- Radio disturbance
characteristics -- Limits and methods of measurement for the protection of on-board receivers
(GB 18655-2002, idt IEC/CISPR 25. 1995)
3 Terms and Definitions
For the purposes of this document, the terms and definitions in GB/T 5620 together with
the follows apply.
3.1 Basic Terms and Definitions
Vehicle type
A category of vehicles which do not differ in such essential respects as.
-- the maximum total design mass;
-- the distribution of mass among the axles;
-- The highest design speed;
-- The type of braking equipment, with more particular reference to the presence or
otherwise of equipment for braking a trailer or any presence of electric braking system;
-- The number of and layout of axles;
-- The type of engine;
-- The gear and speed ratio of transmission;
-- The final drive ratios;
-- The tyre dimensions.
Braking equipment
The combination of parts whose function is progressively to reduce the speed of a
moving vehicle or bring it to a halt, or to keep it stationary if it is already halted; the
equipment consists of the control device, the transmission device, and the brake proper.
Control device
The part actuated directly by the driver to furnish to the transmission the energy required
for braking or controlling it. This energy may be the muscular energy of the driver, or energy
from another source controlled by the driver, or a combination of these various kinds of
Transmission device
The combination of components comprised between the control and the brake and
linking them functionally. The transmission may be mechanical, hydraulic, pneumatic,
electric or mixed. Where the braking power is derived from or assisted by a source of energy
independent of the driver, the storage of energy (energy accumulator) in the system is
likewise part of the transmission.
The transmission device is divided into two independent functions. the control
transmission and the energy transmission. Whenever the term ‘transmission’ is used alone in
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.