发动机自动熄火的故障维修.doc

摘 要 　　电控发动机与化油器式发动机最大的不同在燃油供给系。电控发动机的燃油供给系取消了化油器，却增加了不少电子自动控制装置。其中包括许多传感器，执行元件和ECU。 电控发动机不仅要完成化油器所要完成的任务，而且要完成化油器难以完成的任务。例如，使可燃混合气的空燃比浓度能控制在所需要的范围内。化油器式发动机油路和电路划分的非常清楚，互相影响不大。而电控发动机燃油供给系统增加了电子控制部分，这就使得油路和电路相互联系，它不仅影响发动机燃油系的工作，而且还影响发动机的正常运行。由于电控发动机电子控制装置的增加，这就使发动机的整个结构(包括电控系)更为复杂现代的轿车发动机大多是电子控制燃油喷射型的汽油发动机，熄火的原因很多，首先要分析熄火的症状。汽车发动机经过长期的使用后或者人为的原因导致发动机熄火，那是什么原因导致发动机熄火呢？那就要我们带着问题来探研问题的所在，从中认我们知道发动机为什么熄火，这样我们才可以以后避免发动机熄火后带给我们的麻烦，防范于未然。 关键词: 发动机 熄火 诊断分析 检测 维修 故障原因 Abstract Electronic-controlled engine and the biggest different type of carburetors engine fuel supply in the department. Fuel supply of electronic-controlled engine is cancelled the carburetor, but increased many electronic control device. Including many sensors, actuators and ECU. Not only must complete carburetor electronic-controlled engine to complete tasks, and to complete the carburetor difficult tasks. For example, the air-fuel mixture than concentration can control in need. Carburetor type engine oil and circuit partitioning of very clear, and influence each other. While electronic-controlled engine fuel supplying system increases the electronic control section, this makes oil and circuit connected, it not only affects the engine fuel, but also affects the normal operation of the engine. Due to the electronic control unit of electronic-controlled engine, which makes the whole structure of engine control (including) is more complex. Modern car engines are mostly electronic fuel injection control of gasoline engine flameout, for many reasons, you must first remove analysis of symptoms. The car engine after long-term use of or cause, what is the engine flameout caused by engine flameout? Then we took questions to exploring the question, we know why deny engine flameout, so we can avoid engine stalled after the trouble, after brings us iridology. Keywords:engine flameout maintenance fault diagnosis analysis目 录 第一章 1 第章 发动机的概述 .1 发动机的简介 .2 发动机的工作原理 .3 常见发动机的结构 第章 发动机的检修 .1 发动机的拆卸 .2 发动机的安