GB 40164-2021 PDF English
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| GB 40164-2021 | English | 605 |
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GB 40164-2021: Automobiles and trailer - Specifications and test methods of brake part---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/GB40164-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.40
T 24
Automobiles and Trailer - Specifications and Test
Methods of Brake Part
[Including Amendment 1 2024XG1]
Issued on. APRIL 30, 2021
Implemented on. JANUARY 1, 2022
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 4
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 6
4 Product Classification... 7
5 Test-related Requirements... 8
6 Technical Requirements... 10
7 Packaging and Marking... 22
8 Product Consistency... 24
Appendix A (normative) Test Methods of Replacement Brake Shoe Assemblies
and Replacement Pad Assemblies for Category-M1, M2 and N1 Vehicles... 26
Appendix B (normative) Test Methods of Replacement Brake Linings,
Replacement Brake Shoe Assemblies and Replacement Pad Assemblies for
Category-M3, N2 and N3 Vehicles... 34
Appendix C (normative) Bench Test Methods of Replacement Brake Shoe
Assemblies for Category-O1 and O2 Vehicles... 39
Appendix D (normative) Test Methods of Replacement Brake Linings and
Replacement Brake Shoe Assemblies for Category-O3 and O4 Vehicles... 41
Appendix E (normative) Test Methods of Replacement Brake Discs and
Replacement Brake Drums for Category-M and N Vehicles... 42
Appendix F (normative) Test Methods of Replacement Brake Discs and
Replacement Brake Drums for Category-O Vehicles... 52
Appendix G (normative) Typical Structures and Related Dimensions of Brake
Discs and Brake Drums... 56
Appendix H (normative) Markings and Positions of Replacement Pad
Assemblies, Replacement Brake Shoe Assemblies and Replacement Brake
Linings... 61
Appendix I (normative) Additional Requirements for Production Consistency 63
Amendment 1 [2024XG1]... 66
Foreword
This Standard was drafted in accordance with the rules in GB/T 1.1-2009.
This Standard was proposed by and shall be under the jurisdiction of Ministry of
Industry and Information Technology of the People’s Republic of China.
Automobiles and Trailer - Specifications and Test
Methods of Brake Part
1 Scope
This Standard specifies the terms and definitions, test-related requirements, technical
requirements, test methods, packaging, marking and product consistency of brake
replacement parts, such as. brake linings, brake shoe assembly, pad assembly, brake
drums and brake discs for automobiles and trailer braking systems.
This Standard is applicable to the following brake parts.
a) Used for the replacement brake shoe assembly and replacement pad
assembly of the friction-type brake of the braking system components of
Category-M, Category N and Category-O vehicles that have completed type
certification in accordance with GB 12676-2014 or GB 21670-2008;
b) Used for the replacement brake linings of Category-M3, Category-N2,
Category-N3, Category-O3 or Category-O4 vehicles that have completed type
certification in accordance with GB 12676-2014, and designed to be riveted
to the brake shoe before assembly and use;
c) Used for the replacement brake shoe assembly and pad assembly of the
parking braking system for exclusive uses;
d) Used for the replacement brake drums and replacement brake discs of the
friction-type brake of the braking system components of Category-M,
Category-N and Category-O vehicles that have completed type certification in
accordance with GB 12676-2014 or GB 21670-2008.
This Standard is not applicable to original brake drums, brake discs, brake shoe
assembly, pad assembly and brake linings (already installed on the vehicle at the time
of type certification), as well as original replacement brake drums, brake discs, brake
shoe assembly, pad assembly and brake linings used for vehicle after-sales
maintenance service.
2 Normative References
The following documents are indispensable to the application of this document. In
terms of references with a specified date, only versions with a specified date are
applicable to this document. In terms of references without a specified date, the latest
version (including all the modifications) is applicable to this document.
GB/T 131 Geometrical Product Specifications (GPS) - Indication of Surface Texture in
Technical Product Documentation
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1.Method of Test at Room
Temperature
GB/T 231.1 Metallic Materials - Brinell Hardness Test - Part 1.Test Method
GB/T 5620 Road Vehicles - Vocabulary and Definition for Braking of Automotive
Vehicles and Their Trailers
GB 5763 Brake Linings for Automobiles
GB/T 7216 Metallographic Test for Gray Cast Iron
GB 12676-2014 Technical Requirements and Testing Methods for Commercial Vehicle
and Trailer Braking Systems
GB 21670-2008 Technical Requirements and Testing Methods for Passenger Car
Braking Systems
3 Terms and Definitions
What is defined in GB/T 5620, GB 12676-2014 and GB 21670-2008, and the following
terms and definitions are applicable to this document.
3.1 Parking Shoe (pad) Assembly
Parking shoe assembly or parking pad assembly separated from the service braking
system and exclusively used by the parking braking system.
3.2 Minimum Thickness
Minimum thickness refers to the limit thickness allowed by the brake disc.
3.3 Maximum Inside Diameter
Maximum inside diameter refers to the inside diameter of the limit friction surface
allowed by the brake drum.
4 Product Classification
4.1 In accordance with the standards implemented for product type certification, brake
parts are divided into.
4.2 In accordance with the structures, dimensions and materials, the replacement
brake drums and replacement brake discs are subdivided into.
5 Test-related Requirements
5.1 Requirements for Test Samples
5.1.1 Replacement brake linings, replacement brake shoe assemblies and
replacement pad assemblies
Unless it is otherwise specified, the number of test samples shall not be less than 3
sets.
5.1.2 Replacement brake discs and replacement brake drums
5.1.2.3 When a comparison test with the original brake discs or brake drums is required,
a set of original brake disc or brake drum shall be provided for the comparison test.
5.1.2.4 If type certification is required on the equivalent brake discs or brake drums, 2
samples of the original brake discs or brake drums shall be provided for a comparison
of dimensions and materials.
5.2 Test Equipment
5.2.1 Bench test equipment is a single-station inertial brake test bench, whose
performance indicators shall satisfy the requirements of the various tests in this
Standard.
5.2.2 The test equipment shall be equipped with a device for continuously recording
the main-shaft velocity, braking torque, braking line pressure, number of turns
completed during one braking, braking time, and temperature of brake disc or brake
drum.
5.2.3 The braking line pressure supply system of the test equipment shall satisfy the
requirements of various brake conditions on the braking line pressure and maintain
stable. The pressure rise and fall rate of the braking line pressure shall satisfy the
following requirements.
5.2.4 The device and thermocouple for the measurement of the temperature of the
brake discs or brake drums, brake linings (pads) shall comply with the relevant
stipulations of QC/T 556.
5.3 Moment of Inertia of Bench Test
5.3.1 Category-M1 vehicles
The moment of inertia shall be calculated in accordance with 6.3 in QC/T 564-2018.
The vehicle mass and tyre rolling radius shall be the full-load mass and tyre rolling
radius corresponding to the vehicle with the largest kinetic energy among the certified
vehicle models.
6 Technical Requirements
6.1 General Rules
6.1.1 When the replacement parts replace the parts originally assembled on the vehicle,
the design and manufacture of the replacement parts shall make the braking efficiency
consistent with that of the certified model, particularly.
6.1.2 The replacement brake linings, or replacement brake shoe assemblies, or
replacement pad assemblies that comply with the stipulations of type certification in
GB 12676-2014 or GB 21670-2008 are considered to be compliant with the
requirements of this Standard.
6.1.3 The replacement brake drums and replacement brake discs that comply with the
stipulations of type certification in GB 12676-2014 or GB 21670-2008 are considered
to be compliant with the requirements of this Standard.
6.2 Replacement Brake Linings, Replacement Brake Shoe Assemblies
and Replacement Pad Assemblies
6.2.1 Brake performance
6.2.1.1 Replacement brake shoe assemblies and replacement pad assemblies for
Category-M1, M2 and N1 vehicles
6.2.1.4 Replacement brake linings and replacement brake shoe assemblies for
Category-O3 and O4 vehicles
6.2.1.4.1 Consistency with GB 12676-2014
In accordance with D.2.1 of Appendix D, conduct Type-I or Type-III test. The thermal
performance of the replacement brake shoe assemblies or replacement brake linings
under the same input shall satisfy one of the following requirements.
6.2.1.5 Replacement brake linings and replacement brake shoe assemblies for
the exclusive use by parking brakes
Install the sample of the replacement brake linings or replacement brake shoe
assemblies on the corresponding brake. In accordance with the stipulations of 5.2.3 in
GB 12676-2014, or the stipulations of 5.2.3 in GB 21670-2008, conduct the test (no
running-in is required), and the control force shall satisfy the relevant requirements.
6.2.2 Mechanical properties
6.2.2.1 Replacement brake shoe assemblies and replacement pad assemblies for
Category-M1, M2, N1, O1 and O2 vehicles
6.3 Replacement Brake Drums and Replacement Brake Discs
6.3.1 Equal brake discs and brake drums
For equal brake discs or brake drums, the manufacturer shall provide relevant
certification documents for the assembled vehicle / vehicle axle (or bridge) / brake to
the certification department, as well as certification documents of the same production
and quality assurance system and conditions as the original brake discs or brake
drums.
6.3.2 Equivalent brake discs and brake drums
6.3.2.1 Geometric characteristics
6.3.2.2 Materials
The chemical composition of the equivalent brake discs or brake drums shall satisfy
the requirements of the corresponding original brake discs or brake drums.
6.3.2.3 Performance requirements
6.3.2.3.1 Thermal fatigue test
7 Packaging and Marking
7.1 Replacement Brake Linings, Replacement Brake Shoe Assemblies
and Replacement Pad Assemblies
7.1.1 The replacement brake linings or replacement brake shoe assemblies, or
replacement pad assemblies of the same model that comply with this Standard shall
be packed and sold in pairs in accordance with the vehicle axles (bridges).
7.1.2 Each pair of products shall be packed in a sealed package with a pre-opening.
7.1.3 The following information shall be marked on each package.
7.1.4 Each package shall be attached with an installation manual, which shall include
the following information.
7.1.5 Each replacement brake lining, or replacement brake shoe assembly or
replacement pad assembly shall be permanently provided with information like
certification marks in accordance with Appendix H.
7.2 Replacement Brake Discs and Brake Drums
7.2.1 Each replacement brake disc or brake drum for sale shall be separately
packaged, and at least the following information shall be provided on the package.
7.2.2 Each package shall be attached with an installation manual, which shall at least
include the following information.
7.2.3 Each replacement brake disc or brake drum shall be permanently provided with
the following information on the non-working surface and / or non-installation surface.
8 Product Consistency
8.1 The production of replacement parts certified in accordance with this Standard shall
be consistent with the approved models.
8.2 The manufacturer of replacement parts shall adopt appropriate production control
measures to ensure product consistency.
8.3 For the replacement brake linings, replacement brake shoe assemblies and
replacement pad assemblies, in accordance with the regular quality assurance
procedures, and the principles of statistical control and random sampling, at least the
relevant tests specified in I.
8.4 For the replacement brake discs and brake drums, in accordance with the regular
quality assurance procedures, and the principles of statistical control and random
sampling, at least the tests specified in I.2 shall be conducted.
8.5 The manufacturer shall configurate necessary test equipment for the consistency
inspection of the replacement parts.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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