The invention relates to a fuel evaporation leakage diagnosis method and device, a vehicle and a storage medium. According to the method, a fuel evaporation leakage diagnosis system is adopted and comprises a first on-off valve arranged between an engine intake manifold and a first end of an activated carbon canister, a second on-off valve arranged between a carbon canister ash filter and a second end of the activated carbon canister, and a pressure sensor arranged between a fuel tank and a third end of the activated carbon canister, the method comprises: acquiring a current working condition of a vehicle; if the current working condition is the preset stable working condition, the first on-off valve and the second on-off valve are controlled to be in a normally-closed state, and the current oil pressure change value of the pressure sensor is obtained; and if the current oil pressure change value is not in the preset oil pressure change interval, it is judged that fuel evaporation leakage exists. Therefore, by using the two-way check valve and the pressure sensor, the fuel evaporation leakage can be diagnosed at any time, the problems that in the prior art, the cost is high, and the fuel evaporation leakage is limited by the vehicle working condition and the external environment are solved, and the applicability is enhanced.
本申请涉及一种燃油蒸发泄露诊断方法、装置、车辆及存储介质。该方法采用燃油蒸发泄露诊断系统,该系统包括设置于发动机进气歧管和活性炭罐的第一端之间的第一通止阀、设置于炭罐灰滤器和活性炭罐的第二端之间的第二通止阀、设置于燃油箱和活性炭罐的第三端之间的压力传感器,其中,方法包括:获取车辆的当前工况;若当前工况为预设稳定工况,则控制第一通止阀和第二通止阀均处于常闭状态,并获取压力传感器的当前油压变化值;若当前油压变化值未处于预设油压变化区间,则判定存在燃油蒸发泄露。由此,通过使用双通止阀和压力传感器,可以随时对燃油蒸发泄露进行诊断,解决了现有技术成本较高,且受限于车辆工况和外界环境的问题,增强适用性。
Fuel evaporation leakage diagnosis method and device, vehicle and storage medium
燃油蒸发泄露诊断方法、装置、车辆及存储介质
2025-01-21
Patent
Electronic Resource
Chinese
IPC: | F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / 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 |
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