Static test method for vehicle failure diagnosis by expert system

摘要

The present invention relates to an automobile by an expert system which diagnoses a failure of an idle mechanism during start-up of an engine of an automobile equipped with an electronic control unit and provides the cause, analysis, confirmation, inspection, and solution of the failure. It relates to an idle test method for troubleshooting. The present invention accurately sets the data and the normal reference values, which are the criteria for the failure determination of parts and sensors, in each failure diagnosis step, and compares the measured values at each step with the data and the normal reference values, such as an expert diagnoses an automobile. It is to determine the presence and to clearly indicate the treatment instructions for the malfunction. The idle test method for vehicle failure diagnosis by the expert system according to the present invention includes the adjustment of the idle switch, the measurement of the voltage of the cooling water temperature sensor, the measurement of the battery terminal voltage and the inspection of the charging device, the measurement of the vibration sensor voltage of the engine, the fuel pressure. Measurement, angular velocity measurement of engine speed sensor, injector surge measurement, ignition primary voltage and current measurement, vacuum degree measurement, motor position sensor voltage measurement, etc.Coolant temperature sensor vibration sensor, engine speed sensor, motor position sensor Through the various sensors, etc., and save the measured value or if there is an error in the measured value to determine whether there is an abnormality and check the location to solve the failure of the abnormal part.