A method for diagnosing a fuel leak of a vehicle includes: measuring a pressure of a fuel tank by a pressure sensor in a closed state of a fuel system during a start-up shutdown of the vehicle (i.e. When the vehicle is shut down); measuring an internal temperature of the fuel tank through a temperature sensor; and diagnosing, by the controller, whether a leak has occurred by performing different leak diagnoses according to the pressure condition of the fuel tank. Thereby, when a pressure value of the fuel tank obtained when the pressure of the fuel tank is measured is at an atmospheric pressure level, the controller performs a first leakage diagnosis; when the pressure value is higher than the positive pressure, the controller performs a second leakage diagnosis; and when the pressure value is lower than the negative pressure, the controller performs a third leakage diagnosis.

    本发明涉及一种用于诊断车辆的燃料泄漏的方法,包括:在车辆的启动关闭期间(即当车辆关闭时),在燃料系统的关闭状态下通过压力传感器测量燃料箱的压力;通过温度传感器测量燃料箱的内部温度;以及通过根据燃料箱的压力条件执行不同的泄漏诊断,通过控制器诊断是否发生泄漏。由此,当当在测量燃料箱的压力时获得的燃料箱的压力值在大气压水平时,控制器执行第一泄漏诊断;当压力值高于正压时,控制器执行第二泄漏诊断;以及当压力值低于负压时,控制器执行第三泄漏诊断。


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    Title :

    METHOD FOR DIAGNOSING FUEL LEAKAGE OF VEHICLE


    Additional title:

    用于诊断车辆燃料泄漏的方法


    Contributors:

    Publication date :

    2022-10-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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