波形诊断技术在K3发动机故障判断上的应用研究

发布时间：2018-05-19 04:27

  本文选题：电控发动机 + 传感器　； 参考：《吉林大学》2016年硕士论文

【摘要】：随着汽车电子控制信息技术的飞速发展,现代电控发动机内部结构越来越复杂,面临电控发动机故障的复杂性和信号的多变性,获得准确故障参数和信息更加困难,发生的故障更加繁杂,意味着对电控系统故障维修诊断难度增加,对发动机诊断技术提出更高的要求,以往传统单一的电控系统故障检测诊断技术或维修方法无法满足当前电控发动机故障维修诊断的需要,为提高电控发动机的检测、诊断速度和维修水平,以实现快速、准确判断发动机故障原因,将波形分析和故障诊断技术相结合应用到发动机故障诊断过程中具有重大的意义。本文以K3电控发动机(1.3L)为研究对象,对K3发动机常见的故障类型和故障原因进行阐述,对传感器和执行器的典型故障产生机理进行分析,按照发动机电控系统故障原因诊断程序和试验方法,采用DISⅡ示波器、X431电脑故障诊断仪和K3发动机故障模拟试验台组建试验平台,利用示波器存贮多次测试的传感器和执行器正常和异常波形进行对比分析,重点针对传感器和执行器的几个典型故障进行波形诊断分析研究,对执行器和传感器输出的正常和异常波形以及记录的故障现象进行分析,得出故障原因与波形异常变化之间的对应关系和规律,进而提出波形诊断分析技术在K3发动机故障诊断上应用的可行性。
[Abstract]:With the rapid development of automotive electronic control information technology, the internal structure of modern electronic control engine is becoming more and more complex, and it is more difficult to obtain accurate fault parameters and information because of the complexity of fault and the variability of signal. The faults occurred are more complicated, which means that it is more difficult for the maintenance and diagnosis of the electronic control system, and higher requirements for the engine diagnosis technology are put forward. In order to improve the detection, diagnosis speed and maintenance level of electronic control engine, the traditional single fault detection and diagnosis technology or maintenance method can not meet the need of fault maintenance diagnosis of electronic control engine. It is of great significance to accurately judge the cause of engine fault and apply waveform analysis and fault diagnosis technology to the process of engine fault diagnosis. In this paper, the common fault types and causes of K3 engine are described, and the typical fault generation mechanism of sensors and actuators is analyzed. According to the fault diagnosis program and test method of engine electronic control system, a test platform was constructed by using DIS 鈪，

本文编号：1908717