我国汽车转向新国标发布：支持线控转向 删除机械连接强制要求

Core Points - The new national standard GB 17675-2025 for automotive steering systems has been officially released and will replace the previous standard GB 17675-2021 starting from July 1, 2026 [1][6] - The primary revision of the new standard addresses new technologies such as steer-by-wire (SBW) and electric power steering (EPS), removing mandatory mechanical connection requirements [1][6] Summary by Category Standard Information - The new standard was published on December 2, 2025, and will be implemented on July 1, 2026 [2] - It is classified under safety standards and is overseen by the Ministry of Industry and Information Technology [2][7] - The standard was drafted by multiple automotive companies, including NIO, Li Auto, Xpeng, BYD, Geely, Xiaomi, Huawei, Toyota, and Mercedes-Benz [2][7] Safety Requirements - The new standard emphasizes enhanced safety requirements, particularly for the redundancy capabilities of steering systems in case of failure [3][7] - It introduces functional safety terminology and verification methods, requiring electronic control systems to meet ISO 26262 functional safety levels [3][7] - Specific requirements for fully powered steering systems include vehicle safety status, degradation requirements, and energy management systems [3][7] Technological Changes - The fully powered steering system eliminates mechanical connections and relies on energy for steering operations, necessitating new alarm methods for battery aging and performance issues [3][7] - Current models utilizing steer-by-wire technology include Infiniti Q50, Zhiji L6, NIO ET9, and Tesla Cybertruck, with NIO ET9 being the first mass-produced model in China to implement full steer-by-wire without mechanical redundancy [3][7]