China: New GB standards for vehicles (for steering systems and driver protection from the steering mechanism)

 

China has published two new GB standards for vehicles:

• GB 17675—XXXX National Standard of the P.R.C., Steering system of motor vehicles—Basic requirements and;
• GB 11557—202X National Standard of the P.R.C., The stipulation protecting drivers from being injured by motor vehicle steering mechanism

The first one specifies the terms and definitions, technical requirements and test methods for steering system of motor vehicles.

This document applies to category M and N vehicles and category O trailers specified in GB/T 15089.This document does not apply to:

——Pneumatic transmission steering systems;

——Vehicles with autonomous steering system as defined in 3.1.1.5.

The second one specifies the technical requirements and test methods for preventing the steering mechanism of motor vehicle from causing injury to the driver during frontal collisions.

This document applies to category M1 and N1 vehicles, and multi-purpose trucks.

 

The first one replaces GB 17675-2021 “Motor Vehicle Steering System Basic Requirements”.

Compared with GB 17675-2021, in addition to structural adjustments and editorial changes, the main technical changes are as follows:

– Changed the terms and definitions of steering transmission device, safety concept, unit, electronic control system, and safety measurement (see Chapter 3, Chapter 3 of the 2021 edition);

– Deleted the terms and definitions of advanced driver assistance steering system and controllability (see Chapter 3, Chapter 3 of the 2021 edition);

– Added the terms and definitions of storage device, storage performance, storage state, aging effect, energy management system, and power supply device (see Chapter 3);

– Changed the functional safety requirements of the steering electronic control system (see 4.1.9, Appendix B, 4.1.9, Appendix B of the 2008 edition);

– Changed the relevant requirements for the steering wheels, steering controls and all mechanical components of the steering transmission mechanism (see 4.3.1.1, 4.3.1.1 of the 2021 Edition);

– Changed the relevant requirements for failure of the full power steering main steering system (see 4.3.3.1, 4.3.3.1 of the 2021 Edition);

– Changed the relevant requirements for failure of the full power steering control transmission (see 4.3.3.2, 4.3.3.2 of the 2021 Edition);

– Changed the relevant requirements for failure of the power source or power supply device of the full power steering control transmission (see 4.3.3.3, 4.3.3.3 of the 2021 Edition);

– Changed the relevant requirements for failure of the full power steering energy transmission (see 4.3.3.4, 4.3.3.4 of the 2021 Edition);

– Changed the relevant requirements for insufficient energy storage level of the energy accumulator (see 4.3.3.5 of the 2021 Edition); 4.3.3.5);

– Added relevant requirements for when the power source or power supply device of the control transmission fails when the energy transmission (or part of it) and the control transmission share the same power source or power supply device (see 4.3.3.6);

– Changed the relevant requirements for the warning signal of full power steering vehicles (see 4.4.2, 4.4.2 of the 2021 Edition);

– Changed the test requirements for measuring the steering force when the vehicle steering system fails (see 5.2.5.1, 5.2.5.1 of the 2021 Edition); – Added the test method for additional tests of the full power steering system (see 5.4);

– Added the requirements for the same type determination (see Chapter 6);

– Changed the relevant requirements for functional safety documentation and verification tests (see Appendix B);

– Added the requirements for the functional safety test report of the steering electronic control system (see Appendix C);

– Added the requirements for the functional safety description of the steering electronic control system (see Appendix D).

 

The second one replaces GB11557-2011 “Provisions for Preventing Driver Injury Caused by Motor Vehicle Steering Mechanisms”.

Compared with GB11557-2011, in addition to structural adjustments and editorial changes, the main technical changes are as follows:

– Changed the scope (see Chapter 1);

– Deleted the terms and definitions of vehicle type, steering control device type, steering shaft, steering column, and R point (see 3.1, 3.2, 3.11, 3.12, and 3.17 of the 2011 edition);

– Added the terms and definitions of steering control support device, Class B voltage circuit, and rechargeable energy storage system (see 3.9, 3.14, and 3.15);

– Changed the terms and definitions of steering control device, universal steering control device, airbag, steering control device rim, wheel hub, steering control device hub center, steering mechanism, passenger compartment, impact head shape, and curb mass (see 3.1, 3.2, 3.3, 3.4, 3.6, 3.7, 3.10, 3.11, 3.12, and 3.13 of the 2011 edition). 3.3, 3.4, 3.5, 3.6, 3.8, 3.9, 3.13, 3.14, 3.15, 3.16);

– Changed the general requirements for steering control devices (see Chapter 4);

– Changed the electrical safety requirements after the frontal fixed barrier impact test (see 5.2, 4.1.1 of the 2011 Edition);

– Changed the technical requirements for the horizontal force acting on the body module in the body module test (see 5.3, 4.2 of the 2011 Edition);

– Added the technical requirements for airbag deployment splashes in the body module test and headform impactor test (see 5.3, 5.4);

– Deleted the requirements for exemption from the body module test (see 4.2 of the 2011 Edition);

– The frontal fixed barrier impact test method has been changed (see 6.1, Appendix B of the 2011 edition);

– The method for testing the worst position in the human body module test has been added (see 6.2.2.2.1);

– The provisions for the center of gravity position and the moment of inertia of the transverse axis of the human body module have been added (see 6.2.2.3.1);

– The impact point of the headform impactor test has been deleted (see D.4.2.3 of the 2011 edition);

– The impact point at the midpoint of the shortest unsupported area on the rim of the steering control device has been added to the headform impactor test (see 6.3.4.2.3);

– The test method for hooking clothing or accessories has been added (see 6.4);

– The same type determination has been added (see Chapter 7).

To find out more about Chinese vehicle regulations and GB standards, please do not hesitate to contact the Institute for Global Automotive Regulatory Research.