丰田凌志发动机电控系统故障诊断与检修.doc

毕业设计(论文)
丰田凌志400发动机电控系统故障的诊断与检修
目录
摘要……………………………………………………………………………2
关键词…………………………………………………………………………2
绪论………………………………………………………………………3
……………………………………………3
…………………………………………………3
2. 电控发动机的概述………………………………………………………4
………………………………………4
………………………………………………5
3. 丰田凌志400电控发动机典型和疑难故障诊断…………………………6
……………………………………………6
……………………………………7
………………………………………………8
……………………………………………9
………………………………………………………10
………………………………………………………………11
………………………………………………………………12
………………………………………………………………13
………………………………………………………………13
…………………………………………………………………………15
丰田凌志400发动机电控系统故障的诊断与检修
摘要
发动机是汽车的重要组成,是车辆运行的动力来源。随着其自动化程度的不断提高、其结构也变得越来越复杂,因此发动机故障发生的频率增大,其诊断难度也不断提高。这样就使得发动机成为汽车故障诊断与检测的重点对象,由于我国汽车工业发展较晚,汽车电子与发达国家差距很大,所以进行汽车故障诊断技术的研究对于改善和提高我国的汽车检测诊断技术非常重要。
汽车发动机故障诊断方法的研究是随着汽车技术不断进步而逐步完善的过程,因此建立科学、系统、合理、完善的汽车故障诊断体系,已成为目前汽车故障诊断的必然要求和技术发展的必然趋势。然而,目前关于发动机故障自诊断系统设计的方法很多,但是在详细分类讨论各自方法的实施和综合对比不同方法的优缺点这一领域还是空白,本论文目的就是填充这一空白,完善汽车故障诊断体系,具有一定的理论价值,同时也便于查阅,具有一定的参考价值。
关键字:电控发动机故障诊断诊断思路
Abstract
Engines are the main assembly of motor vehicles, are important power sources for vehicles. With its continuous improvement of working performance and the level of automation, vehicles' structures also ing more and plicated,moreover, extremely poor working conditions increase engine failure incidence,which means that, also increase the difficulty to fault diagnosis. So the probability of engine failure is also growing, that lead to more difficult of its diagnosis. This makes automotive engine to be the important object of fault diagnosis and detection. With the rapid development puter and software technology, the degree of modern automotive electronics continues to improve greatly, not only optimized vehicle performance greatly, but plicated the vehicle control system's structure and function. However, once the control system took place fault diagnosis and repair