波形分析在电控发动机故障诊断中的应用

Application of Waveform Analysis in Fault Diagnosis of Automotive Electronic Control Engine

汽车电子设备的有些信号变化速率非常快,许多故障信号是间歇的,时有时无,这就需要仪器的测试速度要高于故障信号的速度,数字示波器完全可以胜任这个速度,且比其他的汽车检测仪还快,高取样速度可以精确详实地显示输入、输出元件的状况,不仅如此,也可以显现出元件或线路的噪声或间歇性故障。通过数字示波器可以观察到汽车电子系统是如何工作的,电控发动机的传感器与执行器的信号波形能够如实反映动态的全过程,同时也呈现出某种变化规律,将这些规律总结出来进行波形分析,可以快速找到发动机故障部位甚至故障原因。

Some signal rate of automotive electronics equipment changes very fast, and many fault signals are intermittent, which requires the test equipment run faster than the speed of fault signals. Digital oscilloscope can be fully competent with this rate, and also it runs faster than any other car tester. Its high sampling speed can precisely display input and output components of the situation, besides, it also shows noise or intermittent fault that the components or line make. How the automotive electronic system works can be observed through digital oscilloseope, the signal waveforms that sensor and actuator of electronically controlled engine happens can truly reflect the dynamics of the whole process, while also appears to be a change in laws. Summary of these laws and thus a waveform analysis can help to find the fault position in the engine quickly, or even the cause of the malfunction.