电控发动机自诊断系统原理及测试技术

Principle and Testing Technique of Self-Diagnosis System in Power-operated Engines

汽车上的电子控制部件越来越多,涉及到发动机、底盘和车辆行驶控制技术等方面。当其中的某一元件发生了故障,仅从其外表或依靠传统的检测工具很难去检查,现代新型的发动机管理系统中都设有自诊断功能,称为“车载故障诊断”,该系统的任务是不断监测车辆异常之处,从中找出故障。

There are more and more power-operated parts on buses,relating to engine,chassis and steering technology,etc.When a part breaks down,it is difficult to check with usual methods.Some modern engines' management system generally bring the self -diagnosis function,called″Onboard Breakdown Diagnosis″,with task of constantly monitoring the abnormalities and finding out the breakdowns.