洗衣厂洗涤及洗涤剂配制.pdf

汽车电子设备研究与维修毕业论文
目录
第一章概述 1
1
1
1
3
4
第二章电子点火系统的故障诊断 5
5
8
11
第三章电子点火系统故障诊断与维修实例 13
(采用无触点式点火系统)点火系统检查 13
13
总结 15
致谢 16
参考文献 17
摘要
现代汽车电子控制技术是汽车技术和电子技术的相结合,是现代工业发展与高新技术发展的产物,汽车电子化程度的高低从某种程度上反映了汽车水平的高低。目前,电子技术的应用已经深入到汽车的所有系统,使汽车的技术性能、经济性和舒适性都有了很大提高,而电子点火系统的应用能更好的提高汽车的动力性、燃油经济性、降低废气排放。本文介绍了现代电子点火系统的优点、分类、构造,系统分析了电子点火系统的常见故障,并结合实际分析了典型故障产生的原因,并给出了具体的故障排除方法。
关键词:电子点火系统; 故障分析; 排除
Abstract
the modern automobile electronic control technology is the automobile technology and the electronic technology unifies, was the modern industry development and the high technology and new technology development product, the puterization degree height has reflected the automobile level height from some kind of degree. At present, electronic technology's application already rated into automobile's all systems, caused automobile's technical performance, the efficiency fortableness had the very big enhancement, but the electron ignition system's application could better enhance automobile's power, the fuel oil efficiency, to reduce the exhaust gas discharge. This article introduced the modern electron ignition system's merit, the classification, the structure, the system analysis electron ignition system'mon breakdown, and unified has analyzed the reason which actually the typical breakdown produced, and has given the concrete trouble shooting method.
key word: Electron ignition system; ic induction type; Fault analysis; Trouble shooting
第一章绪论

传统点火系是靠断电触点来接通和切断点火线圈初级电流而使点火线圈此级产生高压电的,这种工作方式不可避免地存在以下的缺陷。
(1)高速易断火
(2)断电触点易烧蚀
(3)对火花塞积炭敏感
(4)起动性能差
(5)无线电干扰大

为了保证发动机在各种工况和使用条件下都可靠并适时点火,点火系统必须满足以下要求。
(1)能产生足以击穿火花塞间隙的电压
(2)点火系统所具有的点火的能量要充足
(3)点火系统控制的点火时间应适当。

电子点火系统又称为半导体点火系统或晶体管点火系统,它主要由点火电子组件、分电器及位于分电器内的点火信号发生器、点火线圈、火花塞等组成,如图所示。
1-火花塞;2-分电器;3-点火信号发生器;4-点火线圈;5-点火开关;