ABS（Anti-lock Brake System）中文意为“防抱死制动系统”，是一种汽车安全装置。它的主要作用是防止在紧急刹车时车轮被锁死，从而提高车辆的制动稳定性和安全性。
ABS的工作原理是通过控制制动系统中的液压压力，对车轮进行周期性的制动和释放，使车轮始终保持在滚动状态，而不是被锁死。这样，车辆可以在各种路况下获得更好的制动效果，避免因为车轮锁死而导致的失控或侧翻事故。
以下是ABS系统的组成部分和工作过程：
1. 传感器：安装在车轮上的传感器检测车轮的速度和制动压力。
2. 控制器：接收传感器的信号并计算出最佳的制动策略。
3. 制动器：根据控制器的指令调整制动压力，对车轮进行制动和释放。
4. 液压系统：将制动压力从主制动缸传递到各轮的制动分泵。
以下是一个简单的ABS系统示意图：
``` 传感器 / \\ / \\ ---------------------------| |----------------------------- | 液压系统 | | 液压系统 | | | | | -------------------| | ------------------- | | 控制器 | | | | 控制器 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |