卡车和公共汽车轮胎的组合转弯和制动测试

[中文适用范围]： 本 SAE 推荐实践描述了一种测定重型卡车（VI、VII 和 VIII 级）轮胎在转弯和制动条件下的力和力矩特性的测试方法。这些属性是作为滑移角、法向力和滑移比的函数获得的。使用本文档中指定的顺序逐渐改变滑移角和法向力。在每次增量时，滑移率都会通过制动扭矩斜坡的应用而不断变化。这些数据适用于车辆动力学建模、研发比较评估以及制造质量控制。本文档旨在成为在理想机器上进行测试的一般指南，并且预计会根据每个客户的要求对其中推荐的协议进行修改。修改协议时必须小心谨慎，以确保保持数据的完整性。 [外文原描述]： This SAE Recommended Practice describes a test method for determination of heavy truck (Class VI, VII, and VIII) tire force and moment properties under combined cornering and braking conditions. The properties are acquired as functions of slip angle, normal force, and slip ratio. Slip angle and normal force are changed incrementally using a sequence specified in this document. At each normal force and slip angle increment , the slip ratio is continually changed by application of a braking torque ramp. The data are suitable for use in vehicle dynamics modeling, comparative evaluations for research and development purposes, and manufacturing quality control. This document is intended to be a general guideline for testing on an ideal machine. Users of this recommended practice may modify the recommended protocols to satisfy the needs of specific use-cases, e.g., reducing the recommended number of test loads and/or pressures for benchmarking purposes. However, due care is necessary when modifying the protocols to maintain data integrity.