The invention provides a leakage diagnosis method for an oil tank evaporation system of a hybrid electric vehicle and the hybrid electric vehicle, and the leakage diagnosis method for the oil tank evaporation system of the hybrid electric vehicle comprises the following steps: driving an engine to rotate by utilizing a motor, and opening a carbon canister control valve so as to enable the oil tank evaporation system to establish negative pressure; the motor stops driving the engine to rotate, the carbon canister control valve is closed, a pressure maintaining test is conducted on the oil tank evaporation system, and if the pressure of the oil tank evaporation system does not exceed a preset threshold value within a preset time period, it is determined that the oil tank evaporation system passes leakage fault detection. By means of the configuration, the motor drives the engine to build negative pressure, the engine does not need to be started and run at an idle speed, the influence on oil consumption is avoided, diagnosis after parking can be achieved, sufficient diagnosis time is provided, small leakage faults can be detected, and the laws and regulations higher than the existing national sixth standard can be met.

    本发明提供一种混动汽车的油箱蒸发系统泄漏诊断方法及混动汽车,所述混动汽车的油箱蒸发系统泄漏诊断方法包括:利用所述电机驱动所述发动机转动,并开启所述炭罐控制阀,以使油箱蒸发系统建立负压;所述电机停止驱动所述发动机转动,并关闭所述炭罐控制阀,对所述油箱蒸发系统进行保压测试,若在预设时段内,所述油箱蒸发系统的压力不超出预设阈值,则确定所述油箱蒸发系统通过泄漏故障检测。如此配置,通过电机驱动发动机来建立负压,不需要发动机起动并怠速运行,避免了对油耗产生影响,可实现停车后进行诊断,有充分的诊断时间,可以实现对小泄漏故障的检测,能够满足比现有国六标准更高的法规要求。


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    Title :

    Fuel tank evaporation system leakage diagnosis method of hybrid electric vehicle and hybrid electric vehicle


    Additional title:

    混动汽车的油箱蒸发系统泄漏诊断方法及混动汽车


    Contributors:
    XIE YUEXIAO (author) / TONG JUANJUAN (author) / LIU CHAOYONG (author) / ZHU WEIJIE (author) / LI LEI (author) / ZHANG LINING (author)

    Publication date :

    2024-10-15


    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 / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen




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