本SAE推荐实践提出了用于道路使用的机动车辆制动系统的性能要求，分为以下几类:轻型卡车和公共汽车:6001-10 000 lb(2700-4500 kg)gvw；卡车和公共汽车:超过10 000磅（4500公斤）的gvw；牵引超过10 000磅（4500公斤）gvw的车辆的车辆组合。可接受的性能要求基于从SAE J786a（1978年3月）适用章节获得的数据。本推荐做法的目的是确定以下方面的最低制动系统性能要求:3.1受车速影响的冷制动器的制动能力。3.2受车速和占空比影响的热制动器的制动能力。3.3踏板力（气压）要求——最大允许值。3.4制动稳定性。3.5湿式制动器的制动能力和恢复。3.6紧急制动系统的制动能力。3.7组合车辆的制动有效性分布。

This SAE Recommended Practice presents performance requirements for the brake systems of motor vehicles intended for roadway use and falling into the following classifications: Light trucks and buses: 6001-10 000 lb (2700-4500 kg) gvw; Truck and bus: Over 10 000 lb (4500 kg) gvw; combination of vehicles towing vehicles over 10 000 lb (4500 kg) gvw. Acceptable performance requirements are based on data obtained from applicable sections of SAE J786a (March, 1978). The purpose of this recommended practice is to establish the minimum brake system performance requirements with regard to: 3.1 Stopping ability--of cold brakes, as affected by vehicle speed. 3.2 Stopping ability--of hot brakes, as affected by vehicle speed and duty cycle. 3.3 Pedal force (air pressure) requirements--maximum allowable. 3.4 Brake stability. 3.5 stopping ability and recovery of wet brakes. 3.6 Stopping ability of emergency brake system. 3.7 Brake effectiveness distribution for vehicles in combination.