GB24550-2024

Protection of motor vehicle for pedestrians in the event of a collision

汽车对行人的碰撞保护

GB 24550-2024 est une norme nationale chinoise obligatoire en vigueur : Protection of motor vehicle for pedestrians in the event of a collision. Secteur : Électronique. Thème principal : Sécurité des produits. Entrée en vigueur : 1 janv. 2025.

L’applicabilité dépend du périmètre du produit, de la voie de certification, des avis des autorités et des règles de transition. Demandez une traduction ou vérifiez la source avant d’utiliser cette fiche pour une décision de conformité.

Aperçu de conformité

Cet aperçu n’est actuellement disponible qu’en anglais.

Champ d’application

This standard applies to M1 and N1 category vehicles, establishing mandatory technical requirements for pedestrian protection in the event of a collision. It specifically excludes certain vehicles where the driver's seat R point is positioned before the front axle center transverse plane with specific distance and mass criteria. Manufacturers of passenger cars and light commercial vehicles must ensure compliance with these updated safety regulations. The standard references GB 15084 for related terminology.

Exigences techniques

The standard specifies legform test requirements based on the vehicle's lower bumper height. For vehicles with a lower bumper height under 425mm, lower legform tests are mandatory, evaluating knee ligament extensions (MCL, ACL, PCL) and tibia dynamic bending moments. Manufacturers must ensure that specific dynamic extension and bending moment limits are not exceeded during impact. For headform impact tests, the regulation divides the bonnet top area and windscreen test area into zones for both child and adult headforms. The primary metric is the Head Injury Criterion (HIC), which must not exceed specified limits for at least two-thirds of the combined test area. Manufacturers are required to define and map HIC 1000 and HIC 1700 zones accurately on the vehicle's top view. Additionally, vehicles equipped with variable ride height systems must undergo further evaluation if the front axle height changes significantly at city driving speeds. These specific test points must also meet the legform and headform performance criteria.

Méthodes d’essai

The standard outlines comprehensive testing procedures using specialized impactors, including lower legform, upper legform, child headform, and adult headform. Tests are conducted at specific impact velocities and precise angles relative to the vehicle's longitudinal vertical plane. Impactors must undergo rigorous static and dynamic calibration procedures before testing to ensure measurement accuracy. The evaluation also includes defining specific measurement points on the vehicle's front structure, referencing ISO 3784 and ISO 6487 for measurement techniques.

Questions fréquentes

What products are regulated under GB 24550-2024?

It regulates M1 and N1 category vehicles (passenger cars and light commercial vehicles) regarding pedestrian collision protection, with specific exclusions based on driver seat position and vehicle mass.

Are there any updates from the previous version of GB 24550-2024?

Yes, this version replaces GB/T 24550-2009. Key changes include updated lower legform test requirements, modified impactor specifications, and the addition of same-type evaluation and standard implementation rules.

When does GB 24550-2024 take effect?

The standard is implemented on January 1, 2025. New vehicle type approvals must comply immediately upon implementation, while previously approved models have a 25-month grace period.

The summary above provides a high-level overview of GB 24550-2024. To ensure complete compliance for your vehicles entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 24550-2024 today to access all detailed parameters, impactor calibration procedures, and testing diagrams.

Indications d’applicabilité

Type: Sécurité
CCS: T09
ICS: 43.020
Autorité compétente: Ministry of Industry and Information Technology
Comité technique: National Technical Committee on Automobiles of Standardization Administration of China

Relations

Remplace:GB/T 24550-2009