The invention discloses a leakage monitoring method for a vehicle evaporation system, and the method comprises the steps: controlling a vehicle to enter a post-operation stage after a leakage diagnosis condition is recognized to be satisfied; whether the first oil tank pressure meets a preset oil tank leakage-free condition or not is recognized; when the first oil tank pressure meets the preset oil tank leakage-free condition, the FTIV valve is kept in the closed state; judging whether the vehicle evaporation system leaks based on the theoretical relative pressure of the oil tank; when the first oil tank pressure does not meet the preset oil tank leakage-free condition, an FTIV valve is opened; acquiring actual oil tank pressure; and judging whether the vehicle evaporation system leaks based on the actual fuel tank pressure. Through joint use of the theoretical oil tank relative pressure and the actual oil tank pressure, the problem that leakage fault judgment is not accurate enough in the prior art can be solved.

    本申请公开了一种车辆蒸发系统的泄漏监测方法,包括:在识别到泄漏诊断条件满足后,控制车辆进入后运行阶段;识别第一油箱压力是否满足预设有的油箱无泄漏条件;当第一油箱压力满足预设有的油箱无泄漏条件时,保持FTIV阀为关闭状态;基于理论油箱相对压力判断车辆蒸发系统是否发生泄漏;当第一油箱压力不满足预设有的油箱无泄漏条件时,打开FTIV阀;获取实际油箱压力;基于实际油箱压力判断车辆蒸发系统是否发生泄漏。本申请通过理论油箱相对压力和实际油箱压力的共同使用,能够解决相关技术中泄露故障判断不够准确的问题。


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    Titel :

    Leakage monitoring method for vehicle evaporation system


    Weitere Titelangaben:

    一种车辆蒸发系统的泄漏监测方法


    Beteiligte:
    LYU DUAN (Autor:in) / TIAN LIANGYUN (Autor:in)

    Erscheinungsdatum :

    2023-03-07


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02B INTERNAL-COMBUSTION PISTON ENGINES , Brennkraftmaschinen mit innerer Verbrennung mit Verdrängerwirkung / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF



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