GB21670-2025

Technical requirements and testing methods for passenger car braking systems

乘用车制动系统技术要求及试验方法

GB 21670-2025 é uma norma nacional chinesa obrigatória vigente: Technical requirements and testing methods for passenger car braking systems. Setor: Eletrônicos. Foco: Segurança de produtos. Entrada em vigor: 1 de jan. de 2026.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard specifies the technical requirements and testing methods for braking systems of passenger cars (Category M1 vehicles as defined in GB/T 15089). It applies to the structural, functional, and performance requirements of service, emergency, and parking braking systems, including advanced systems like Electric Transmission Braking Systems (ETBS) and electric regenerative braking systems. It is mandatory for all M1 category vehicle manufacturers seeking type approval in China.

Requisitos técnicos

The standard outlines comprehensive requirements across several domains. It defines the structural and functional requirements for braking equipment, ensuring resistance to vibration, corrosion, and electromagnetic interference. It mandates that braking systems must provide graduated/modulatable braking and specifies the functional safety requirements for electronic control systems, referencing GB/T 34590. For system characteristics, it details the requirements for hydraulic transmission systems, including warning devices for pressure differentials and fluid levels. It introduces specific requirements for ETBS, covering energy storage devices, power supply, and aging effects, ensuring emergency braking performance even under electrical failures. Manufacturers must ensure that ETBS maintains braking performance after multiple full actuations without energy supply. The standard also specifies requirements for electric regenerative braking systems (both Type A and Type B), including default deceleration limits when releasing the accelerator pedal and the interaction with anti-lock braking systems (ABS). It mandates that M1 vehicles must be equipped with ABS and defines the conditions for emergency braking signals and braking lamp activation. Additionally, it includes normative appendices for functional safety documentation, hazard analysis, and risk assessment, aligning with international automotive safety standards. It also covers testing requirements for vehicles equipped with temporary spare wheels/tires.

Métodos de ensaio

The standard prescribes a rigorous set of testing methods, including: - Static Inspections: Verification of documentation, component integrity, wear adjustment, and warning signal functionality. - Type 0 Tests (Cold Braking): Evaluating basic braking performance with both power disconnected and connected, under both empty and loaded conditions. - Type I Tests (Fade and Recovery): Assessing braking performance after repeated heating cycles and subsequent recovery. - ABS Tests: Measuring adhesion coefficient utilization on low and high-friction surfaces, including split-friction (μ-split) and transition (μ-jump) road tests. - Failure Tests: Simulating various system failures (e.g., hydraulic leaks, electrical faults, sensor malfunctions) to verify emergency braking performance. - ETBS Specific Tests: Evaluating energy storage performance, power supply capacity, and response times under specific fault conditions.

Perguntas frequentes

What products are regulated under GB 21670-2025?

GB 21670-2025 regulates the braking systems of Category M1 vehicles (passenger cars) as defined in GB/T 15089. This includes vehicles with internal combustion engines, electric vehicles, and hybrid vehicles equipped with various braking technologies like ETBS and regenerative braking.

Are there any updates from the previous version of GB 21670?

Yes, GB 21670-2025 replaces GB 21670-2008. Key updates include the addition of requirements for Electric Transmission Braking Systems (ETBS), emergency braking signals, temporary spare wheel testing, and enhanced functional safety requirements for electronic control systems. It also modifies testing methods for regenerative braking and ABS.

How does GB 21670-2025 address functional safety?

The standard includes normative appendices (A, B, C) that mandate functional safety documentation, hazard analysis, and risk assessment in accordance with GB/T 34590. Manufacturers must submit detailed safety concepts and verification plans to prove compliance.

The summary above provides a high-level overview of GB 21670-2025. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 21670-2025 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Segurança
CCS: T24
ICS: 43.040.40
Órgão competente: Ministry of Industry and Information Technology
Comitê técnico: National Technical Committee on Automobiles of Standardization Administration of China

Relações

Substitui:GB 21670-2008