The Application Research Of Waveform Diagnosis Technology On K3 Engine Fault Diagnosis

With the rapid development of automobile electronic control information technology, the internal structure of modern electronic control engine is more and more complex.In face of the complexity of the electronically controlled engine failureand and the thepolytropy of the signal, obtaining the accurate fault parameters andinformation becomes more difficult.the more complex fault means more difficult to diagnose the fault of the electronic control system.In the meantime,it requires the higher request to the Engine diagnostic technique.the traditional diagnosis techniques or repair methods for electronic control system fault can not meet the need of the current electronic control system fault diagnosis.In order to improve the detection, diagnosis,and the maintenance level of the electronic-controlled engine, to Achieve the rapid and accurate judgment of engine failure reasons.Combining the waveform analysis with the fault diagnosis technology is of great significance in the engine fault diagnosis process.This paper Aims at the K3 electronic-controlled engine(1.3 L) as research object, Common failure types and failure reason of K3 engine The typical failure mechanism of sensor and actuator are analyzed According to the process of engine electronic controlsystem fault diagnosis and test methods Using DISⅡ oscilloscope, X431 computer fault diagnosis instrument and K3 engine fault simulation test bench to build the test platform.Using oscillograph which can put the normal and abnormal waves of sensors and actuators in storage to analyz.Focus on several typical sensor and actuator fault waveform diagnosis analysis and the The caused fault phenomenon to research to reach the conclusion the ause of the problem and the corresponding relationship between waveform changes and regularity.Diagnostic analysis and waveform technology in K3 application feasibility of engine fault diagnosis.