GB/T 5620-2020 PDF English
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| GB/T 5620-2020 | English | 555 |
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Road vehicles - Vocabulary and definition for braking of automotive vehicles and their trailers
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| GB/T 5620-2002 | English | RFQ |
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Road vehicles -- Braking of automotive vehicles and their trailers -- Vocabulary
| Obsolete |
| GB/T 5620.1-1985 | English | 639 |
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The terms and definitions of braking of automotive vehicles and their trailers--Types, constituent elements, braking mechanics and phenomenon of braking system
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GB/T 5620-2020: Road vehicles - Vocabulary and definition for braking of automotive vehicles and their trailers
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT5620-2020
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.
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.
3 Braking systems and equipment - General
Braking system allowing the driver to control, directly or indirectly and in a
graduated manner, the speed of a vehicle during normal driving or to bring the
vehicle to a halt.
4 Classification of braking systems
Braking system in which the energy required for braking is supplied by one or
more compressed springs acting as an energy storage accumulator.
5 Braking system components
A braking system consists of connected devices which supply energy, control and
transmit that energy to the brakes and, if necessary, via supplementary devices on
the towing vehicle, to the brakes of a towed vehicle.
Friction brake in which the friction forces are produced between the
components attached to a fixed part of the vehicle and the faces of one (more)
discs.
6 Driver supporting control braking systems
Multi-wheel control where the group of wheels controlled by the common
command is restricted to those only on one side of the vehicle.
Multi-wheel control where the signal of a predetermined wheel controls the
system for all the wheels of the group.
7 Braking phenomena
Shallow crack in the surface, usually present in some numbers on the same lining.
Random braking performance differences that the driver observes and which
could affect the vehicle stability.
8 Brake lining tests
Test procedure consisting of one or more brake applications or the continuous
dragging of the brake to generate heat with the effect that differences in braking
performance, if any, can be observed.
9 Braking mechanics
Return of one or more braking system(s) to the deactivated condition.
Minimum braking performance required by regulations.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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