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    电控发动机的故障分析原因有哪些?
    2021-9-14 13:53:31

    一、故障码分析。(故障灯亮,宜采取先读码分析)

    1、 Fault code analysis. (if the fault light is on, it is advisable to read the code first for analysis)

    二、数据流分析。(着车状态,观察各传感器、执行器的动态变化和标准数据是否一致)

    2、 Data flow analysis. (observe whether the dynamic changes of each sensor and actuator are consistent with the standard data when driving)

    三、油压分析。(当故障现象和燃油系统相关时,宜采用)

    3、 Oil pressure analysis. (it should be used when the fault phenomenon is related to the fuel system)

    四、点火分析。(检查点火线圈、分火头、高压线及点火波形等)主要以替换方式来验证。

    4、 Ignition analysis. (check the ignition coil, distributor, high-voltage line and ignition waveform, etc.) it is mainly verified by replacement.

    五、尾气分析。(分析尾气的数据值和故障现象的关联)

    5、 Tail gas analysis. (analyze the correlation between data value of tail gas and fault phenomenon)

    14.JPG

    六、压力/真空分析。(正常57-71Kpa,怠速波动不应大于5Kpa)

    6、 Pressure / vacuum analysis. (normal 57-71kpa, idle speed fluctuation shall not be greater than 5kpa)

    七、温度分析。(来验证故障现象和温度的关系,如排气各缸温差不大于100度,水温表、传感器、空调系统及三元催化器的进排气温差等等,凡和温度相关联的)

    7、 Temperature analysis. (to verify the relationship between fault phenomenon and temperature, such as the temperature difference of each exhaust cylinder is not greater than 100 degrees, the temperature difference of inlet and exhaust of water temperature gauge, sensor, air conditioning system and three-way catalyst, etc., where it is related to temperature)

    八、电控、电脑电路的分析。(使用万用表、模拟器、模拟在线信号,观察对比前后变化;及应用示波器检查各传感器和电脑之间的信号变化关系)

    8、 Analysis of electronic control and computer circuit. (use multimeter, simulator and analog on-line signal to observe and compare the changes before and after; and use oscilloscope to check the signal change relationship between each sensor and computer)

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