The invention discloses a vehicle leakage diagnosis method and device in a power-on stage, equipment and a storage medium, and relates to the technical field of vehicle control. The vehicle leakage diagnosis method in the power-on stage comprises the steps that when a vehicle is in the power-on stage, a diagnosis state control signal is obtained; judging whether the diagnosis state control signal is in a preset diagnosis parameter range or not; when the diagnosis state control signal is within the preset diagnosis parameter range, air is pumped into the fuel evaporation system; and according to the pump current signal of the fuel evaporation system after the air is pumped, whether the vehicle has a leakage fault or not is judged. The timing of carbon tank control valve leakage diagnosis is judged in the mode of obtaining a diagnosis state control signal in the vehicle power-on stage, air is pumped into a fuel evaporation system when diagnosis needs to be carried out, and the leakage condition of a carbon tank control valve is diagnosed according to a pump current signal. And the situation that the leakage condition is not accurately judged by using the manifold vacuum degree due to the uncertain operation time of the hybrid vehicle engine is avoided.
本申请公开了一种上电阶段车辆泄漏诊断方法、装置、设备及存储介质,涉及车辆控制技术领域。上电阶段车辆泄漏诊断方法包括:在车辆处于上电阶段时,获取诊断状态控制信号;判断诊断状态控制信号是否处于预设诊断参数范围;在诊断状态控制信号处于预设诊断参数范围内时,向燃油蒸发系统内泵入空气;根据泵入空气后燃油蒸发系统的泵电流信号,判断车辆是否发生泄漏故障。通过在车辆上电阶段通过获取诊断状态控制信号的方式判断进行碳罐控制阀泄漏诊断的时机,在需要进行诊断时向燃油蒸发系统内泵入空气并根据泵电流信号对碳罐控制阀的泄漏状况进行诊断,避免混动车辆发动机运行时间不确定导致使用歧管真空度判断泄漏状况不够准确。
Vehicle leakage diagnosis method, device and equipment in power-on stage and storage medium
上电阶段车辆泄漏诊断方法、装置、设备及存储介质
2024-11-22
Patent
Electronic Resource
Chinese
IPC: | F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
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