汽车专业毕业论文.pdf

北京工业职业技术学院毕业论文用纸

题目：电控系统的故障诊断

函授站: 西安城市交通技师学院

专业班级: 汽车检测与维修14 高汽2 班日期：2016 年10 月

前言-----------------------------------------------------

关键词：波形分析故障诊断点火峰值

With the rapid development of automobile electronic information technology, Auto fit with a growing number of electronic devices, whic in today's automobile fault diagnosis presented new challenges. How to

fast, accurate diagnosis of automotive electronic control system, is

the modern challenges faced by many automotive maintenance staff.

The first known, on the fault diagnosis of electric control system

there are basically four ways: multimeter diagnosis, diagnostic fault

codes, data flow analysis and waveform analysis. At present, China's

automobile repair industry on the use of decoders has been widespread,

most maintenance staff have mastered the use of a decoder to fault

diagnosis. However, accurate fault diagnosis of automobile only decoder is not enough. Maintenance experience knows that, most of the vast number decoder can only be resolved when the dashboard ' fault light ' light

failure detected by the system when, but the problem is the system fault light to be lit and fault code existence, such as sensors and actuato in automotive electronic control system in use for a long time wear,

corrosion, ageing, during deformation. Their performance also variation, electronic control units often cannot determine at this time they fai In addition, even if ' fault light ' light decoder when read out of the

trouble code, sometimes it's difficult to tell a complex electronic

control system fault, oscilloscope features in using detection devic at this time to wave the suspect parts test, it can be detected so that maintenance personnel quickly understand is part of work performance

to quickly isolate the failing component.