公路车辆车速表和里程表系统

[中文适用范围]： 本推荐做法旨在为行业技术人员提供车辆车速表系统精度和偏移量要求以及里程表系统精度要求的概述。本文件涵盖的车速表和里程表系统集成到车辆的电气和电子系统中，由 OEM@ 直接组装到车辆中，并使用来自至少一个车轮的旋转数据，该数据被适当地转换为纵向车辆速度和行驶距离信息。该标准仅限于新（制造）汽车@轻型卡车@和中型卡车上的子午线轮胎。可以使用用于测量车辆速度和行驶距离的其他方法，只要它们满足本文的性能建议。任何当地市场监管要求都必须满足并应取代本文件。维修零件超出了本建议实践的范围。 [外文原描述]： This recommended practice is intended to provide industry technical personnel with an overview of vehicle speedometer system accuracy and offset requirements and odometer system accuracy requirements. Speedometer and odometer systems covered by this document are integrated into a vehicle's electrical and electronics system, assembled directly into the vehicle by the OEM, and use rotational data from at least one vehicle wheel that is appropriately converted into longitudinal vehicle speed and distance traveled information. This standard is limited to radial ply tires on new (as manufactured) cars, light trucks, and medium duty trucks. Other methods for measuring vehicle speed and distance traveled may be used provided they meet the performance recommendations herein. Any local market regulatory requirements must be met and shall supersede this document. Service parts are beyond the scope of this recommended practice.Cross Reference: