GB24929-2010

Limit and measurement method of noise emitted by accelerating all-terrain vehicles

全地形车加速行驶噪声限值及测量方法

GB 24929-2010 é uma norma nacional chinesa obrigatória vigente: Limit and measurement method of noise emitted by accelerating all-terrain vehicles. Setor: Automotivo. Foco: Segurança de produtos. Entrada em vigor: 1 de jan. de 2011.

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 noise limits and measurement methods for accelerating all-terrain vehicles (ATVs). It is applicable to the type-approval and production consistency inspection of ATVs. This standard does not apply to off-highway ATVs or special-purpose ATVs. It covers vehicles powered by internal combustion engines, pure electric drives, and hybrid systems.

Requisitos técnicos

The standard establishes mandatory noise emission limits for ATVs during acceleration, categorized by engine displacement or motor power. For internal combustion engine vehicles, limits are tiered into two phases based on engine displacement (e.g., ≤50 mL, >50 and <175 mL, ≥175 mL). For pure electric vehicles, limits are determined by the maximum continuous power of the electric motor (e.g., ≤4 kW and >4 kW). For production consistency inspection, the noise limits are 1 dB(A) higher than the type-approval limits, and the measured noise value must not exceed the type-approval measured value plus 3 dB(A). Hybrid vehicles must be evaluated separately according to their respective power sources. Additionally, ATVs equipped with exhaust silencing systems containing fibrous sound-absorbing materials must comply with the relevant requirements specified in GB 16169-2005.

Métodos de ensaio

The testing procedure requires a specific measurement environment, including a flat, dry surface free of sound-reflecting objects within a 50m radius. Measurements must be conducted under specific meteorological conditions (no rain/snow, wind speed ≤3 m/s). Acoustic instruments must comply with GB/T 3785 for Type 1 precision sound level meters. The microphone is positioned 7.5m ± 0.2m from the track centerline and 1.2m ± 0.1m above ground. The test involves the vehicle accelerating between two lines (A-A' and B-B') with the throttle fully open. The approach speed and gear selection are strictly defined based on the powertrain type (internal combustion, electric, or hybrid). The final result is the average of four valid measurements, with 1 dB(A) subtracted to account for measurement uncertainty.

Perguntas frequentes

What products are regulated under GB 24929-2010?

GB 24929-2010 regulates the noise limits and measurement methods for accelerating all-terrain vehicles (ATVs), including those powered by internal combustion engines, pure electric drives, and hybrid systems. It does not apply to off-highway or special-purpose ATVs.

What are the differences between type-approval and production consistency noise limits?

For production consistency inspection, the noise limit is 1 dB(A) higher than the type-approval limit. Furthermore, the measured noise value during production consistency checks must not exceed the type-approval measured value plus 3 dB(A).

How is the test approach speed determined for electric ATVs?

For pure electric ATVs, the vehicle must approach the starting line (A-A') at a stable speed of either 50 km/h or 3/4 of its maximum speed, whichever is lower.

The summary above provides a high-level overview of GB 24929-2010. 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 24929-2010 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Proteção ambiental
CCS: Z32
ICS: 13.140
Órgão competente: Ministry of Ecology and Environment
Comitê técnico: Ministry of Ecology and Environment