GB/T 5620-2020 (GB/T5620-2020, GBT 5620-2020, GBT5620-2020)
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Road vehicles -- Vocabulary and definition for braking of automotive vehicles and their trailers
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GB/T 5620-2020
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Standards related to: GB/T 5620-2020
| Standard ID | GB/T 5620-2020 (GB/T5620-2020) | | Description (Translated English) | Road vehicles -- Vocabulary and definition for braking of automotive vehicles and their trailers | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | T24 | | Classification of International Standard | 43.040.40 | | Word Count Estimation | 43,445 | | Date of Issue | 2020-09-29 | | Date of Implementation | 2021-04-01 | | Older Standard (superseded by this standard) | GB/T 5620-2002 | | Drafting Organization | China FAW Technology Center, Guangdong Automobile Testing Center Co., Ltd., Zhejiang Wanan Technology Co., Ltd. | | Administrative Organization | National Automotive Standardization Technical Committee (SAC/TC 114) | | Regulation (derived from) | National Standard Announcement No. 20 of 2020 | | Proposing organization | Ministry of Industry and Information Technology of the People's Republic of China | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | GB/T 5620-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.40
T 24
GB/T 5620-2020 / ISO 611:2003
Replacing GB/T 5620-2002
Road vehicles - Vocabulary and definition for braking
of automotive vehicles and their trailers
(ISO 611:2003, Road vehicles - Braking of automotive
vehicles and their trailers - Vocabulary, IDT)
ISSUED ON: SEPTEMBER 29, 2020
IMPLEMENTED ON: APRIL 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Braking systems and equipment - General ... 5
4 Classification of braking systems ... 7
4.1 Braking systems relating to their energy supplying device ... 7
4.2 Braking systems relating to transmission means ... 8
4.3 Braking systems relating to arrangement of transmission means ... 9
4.4 Braking systems relating to vehicle combination ... 10
5 Braking system components ... 11
6 Driver supporting control braking systems ... 21
7 Braking phenomena ... 25
7.1 Lining characteristics with potential influence on braking performance ... 25
7.2 Vehicle braking behaviour ... 27
8 Brake lining tests ... 28
9 Braking mechanics ... 29
10 Pressures ... 44
11 Additional definitions ... 47
Annex A (Normative) Brake amplification factors ... 49
Annex B (Normative) Evaluation of mean fully developed deceleration ... 53
Bibliography ... 55
Index ... 56
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 5620-2002 "Road vehicles - Braking of
automotive vehicles and their trailers - Vocabulary". Compared with GB/T 5620-
2002, the main technical changes of this Standard are as follows:
- ADD endurance braking system and its control device types to the braking
systems (see 3.2.4);
- ADD terms and definitions of braking systems relating to transmission
means (see 4.2);
- Adjust the relevant terms of brake components to Clause 5 (see 5.5.1;
Clause 9 of the 2002 edition);
- ADD the terms and definitions of "categories of retarder" and "auxiliary
device consuming energy" (see 5.5.3.1, 5.14);
- Delete the term and definition of "non-continuous braking system" (see
5.3.5 of the 2002 edition);
- Modify the definition of "retarder" (see 5.5.3; 4.5.3 of the 2002 edition);
- ADD terms and definitions of "engine brake", "exhaust retarder",
"hydrodynamic retarder", "hydrostatic retarder", "permanent-magnetic
retarder", "regenerative braking retarder", and "mechanical regenerative
braking retarder" (see 5.5.3.2.1, 5.5.3.2.3, 5.5.3.2.5.1, 5.5.3.2.5.2,
5.5.3.2.6.2, 5.5.3.2.6.3, 5.5.3.2.7);
- Delete the term and definition of "friction retarder" (see 4.5.3.6 of the 2002
edition);
- ADD terms such as "traction control system", "stability control system",
"brake hold and release aid", "autonomous intelligent cruise control", and
"coupling force control system" and their definitions (see 6.2, 6.3, 6.4, 6.5,
6.6);
- Adjust the terms related to the surface condition of brake linings to Clause
7 (see 7.1; 9.5 of the 2002 edition);
- ADD "brake application", "brake actuation", "brake release", "actuation
threshold", "clamping", "brake release position", "braking performance",
"braking slip", "adhesion utilization", "compatibility", as well as terms and
definitions related to the coefficient of friction (see 9.2, 9.3, 9.4, 9.5, 9.6, 9.7,
9.8, 9.18, 9.19, 9.20, 9.21);
- LIST the terms related to pressures separately; ADD terms such as "cut-
out pressure" and "cut-in pressure" and their definitions (see Clause 10; 6.4
of the 2002 edition);
- ADD the terms and definitions of "graduated braking", "automatic braking",
"automatically commanded braking", "selective braking", "predominance",
"running clearance", "circuit" and "braking modulation" (see Clause 11).
This Standard, using translation method, is identical to ISO 611:2003 "Road
vehicles - Braking of automotive vehicles and their trailers - Vocabulary".
China’s document which has a consistent correspondence with the international
document normatively referenced in this Standard is as follows:
- GB/T 3730.1-2001 Motor vehicles and trailers - Types - Terms and
definitions (ISO 3833:1977, MOD).
This Standard has made the following editorial changes:
- CHANGE the standard name to "Road vehicles - Vocabulary and definition
for braking of automotive vehicles and their trailers";
- REWRITE the definitions of some terms in accordance with Chinese
language conventions.
This Standard was proposed by Ministry of Industry and Information Technology
of the PRC.
This Standard shall be under the jurisdiction of National Technical Committee
of Auto Standardization (SAC/TC 114).
Drafting organizations of this Standard: Technical Center of China FAW Group
Co., Ltd., Guangdong Automotive Test Center Co., Ltd., Zhejiang VIE Science
& Technology Co., Ltd.
Main drafters of this Standard: Lin Dahai, Xiao Wenjian, Hou Zonggang, Liu
Jianguang, Wang Yufeng, Lv Zheng.
The previous editions of the standard replaced by this Standard were released
as follows:
- GB/T 5620.1-1985, GB/T 5620.2-1985;
- GB/T 5620-2002.
Road vehicles - Vocabulary and definition for braking
of automotive vehicles and their trailers
1 Scope
This Standard defines the principal terms used in relation to the braking and
braking equipment of motor vehicles and trailers as defined in ISO 3833.
This Standard applies to braking systems or elements involved during the
operation of braking; can also be used to describe all or part of the characteristic
parameters during the braking process.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
ISO 3833:1977 Road vehicles - Types - Terms and definitions
ISO/TR 13487:1997 Braking of road vehicles - Consideration on the
definition of mean fully developed deceleration
3 Braking systems and equipment - General
3.1
Braking equipment
All braking systems fitted to a vehicle.
3.2
Braking system
Combination of parts which fulfil one or more of the following functions:
- control (usually to reduce) a vehicle's speed,
- bring the vehicle to a halt or hold it stationary.
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