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GB 20073-2025: Performance and measurement method for braking of motorcycles and mopeds
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GB 20073-2025: Performance and measurement method for braking of motorcycles and mopeds

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ICS 43.140 CCST80 National Standards of the People's Republic of China Replaces GB.20073-2018 Braking performance requirements for motorcycles and mopeds Test methods Published on 2025-12-31 Implemented on 2027-07-01 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Table of contents

Preface III 1.Scope 1 2 Normative References 1 3.Terms and Definitions 1 4 Requirements 5.Test Methods 8. 6.Identification of the same type 9. 7.Implementation of the Standard 11 Appendix A (Normative) Testing and Performance Requirements for Service Braking Systems 12 Appendix B (Normative) Test and Performance Requirements for Anti-lock Braking Systems 22 Appendix C (Normative) Partial Failure Tests and Performance Requirements for Multi-Circuit Service Braking Systems 26 Appendix D (Normative) Failure Tests and Performance Requirements for Power Assist Braking Systems 27 Appendix E (Normative) Failure Tests and Performance Requirements for Interlocking Braking Systems 28 Appendix F (Normative) Special requirements for the safety of composite electronic vehicle control systems 29 Appendix G (Normative) Determination of Peak Braking Force Coefficient 31 References 34

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document supersedes GB.20073-2018 "Requirements and Test Methods for Braking Performance of Motorcycles and Mopeds", and is consistent with GB.20073- Compared to.2018, aside from structural adjustments and editorial changes, the main technical changes are as follows. a) The scope has been changed, and scopes that are no longer applicable have been added (see Chapter 1, Chapter 1 of the.2018 edition); b) The standard upon which the vehicle definition is based has been changed (see Chapter 3, Chapter 3 of the.2018 edition); c) Added the terms "Actuation", "Brake Signal", "Electric Regenerative Braking System", "Automatic Control Braking", "Safety Concept", and "Electronic Control". "System", "Composite Electronic Vehicle Control System", "Unit" and their definitions (see Chapter 3); d) The specific requirements for brake system installation have been changed (see 4.3.5, 4.3.2 in the.2018 version); e) The electromagnetic compatibility requirements for braking systems have been changed (see 4.3.6, B.1.3 of the.2018 edition); f) The requirements for signaling devices have been changed (see 4.5,.2018 edition of 4.5); g) Added requirements for emergency braking signals (see 4.6); h) The requirement to shut down the anti-lock braking system has been added (see 4.7); i) The requirement for brake light illumination has been added (see 4.8); j) Requirements for composite electronic control systems have been added (see 4.9); k) The requirements for ambient temperature during testing have been changed (see 5.1.2.1,.2018 version of 5.1.2.1); l) The requirement for determining the same type has been added (see Chapter 6); m) The scope of application of the testing and performance requirements for anti-lock braking systems has been changed (see B.1.2,.2018 version of B.1.2); n) The requirement for driver-selectable anti-lock braking system modes has been added (see B.1.4); o) The braking performance requirements after an electrical fault in the anti-lock braking system have been changed (see B.8.2,.2018 version of B.8.2); p) Special requirements have been added regarding the safety of composite electronic vehicle control systems (see Appendix F). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed and is under the jurisdiction of the Ministry of Industry and Information Technology of the People's Republic of China. The release history of this document and the document it replaces is as follows. ---First published in 1985 as GB 5382-1985, and first revised in.1996 as GB 5382.1-1996; ---This part was incorporated into GB 17355-1998 "Limits of Braking Performance Indicators for Motorcycles and Mopeds" during the second revision in.2006. Contents, third revision in.2018; ---This is the fourth revision. Braking performance requirements for motorcycles and mopeds Test methods

1 Scope

This document specifies the requirements, test methods, type-identity determination, and implementation of standards for the braking performance of motorcycles and mopeds. This document applies to motorcycles and mopeds. This document does not apply to vehicles for disabled persons or off-road motorcycles.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 5359.1 Motorcycles and Mopeds - Terminology - Part 1.Vehicle Types GB/T 5359.4 Motorcycles and Mopeds Terminology Part 4.Mass of Two-Wheeled and Three-Wheeled Vehicles GB 15365 Graphic symbols for control components, indicators and signaling devices of motorcycles and mopeds GB/T 20076-2021 Methods for measuring maximum torque and maximum net power of motorcycle and moped engines GB 34660 Electromagnetic compatibility requirements and test methods for road vehicles

3 Terms and Definitions

The terms and definitions defined in GB/T 5359.1 and GB/T 5359.4, as well as the following terms and definitions, apply to this document. 3.1 Brake system A combination of components that gradually slows down or stops a moving vehicle, or keeps a stopped vehicle stationary. Note. The braking system consists of a controller, a power transmission device, and a brake, but does not include the engine. 3.2 controller A component directly operated by the driver to provide the energy required for braking or control to the power transmission device. 3.3 Transmission device A combination of components positioned between the controller and the brake, enabling the two to function together. 3.4 brake The component in the braking system that generates the force that resists the movement of the vehicle. 3.5 Service Brake System A braking system that slows down a moving vehicle. ...