为确保行车安全以及发挥汽车高速行驶能力，汽车必须保证能够及时减速和在最短距离内停车，并且还要能够可靠地停放于坡道之上。这样，就要求汽车制动系统必须处在良好的工作状态。一旦发现有故障，必须立即排除，以免发生事故，造成不必要的损失。1驻车制动系统（手制动）的常 To ensure driving safety and high-speed car driving, the car must ensure that it can be decelerated in time and parked within the shortest distance, and that it can be parked reliably on a ramp. In this way, the car brake system must be in good working condition. Once found faulty, must be immediately ruled out to avoid accidents, resulting in unnecessary losses. 1 parking brake system (hand brake) often