The invention provides an electric four-wheel drive type single motor fault limp control method and system, and the method comprises the following steps: after a vehicle is started, a vehicle control unit (VCU) detects whether a four-wheel drive power system has a fault or not; when it is detected that a single front motor system or a single rear motor system breaks down, the vehicle speed is intelligently adjusted according to the ramp working condition, and a limp mode is started; after the limping mode is entered, the allowable maximum rotating speed n1 of the single front motor or the single rear motor is calculated and input to a vehicle control unit; the vehicle control unit VCU obtains driving information of the current vehicle and calculates the maximum rotating speed allowed by a normal motor corresponding to the dynamic gradient; calculating the rotating speed n2 of the corresponding fault motor under the maximum rotating speed; n1 and n2 are compared and smaller, and the maximum vehicle speed V of the whole vehicle capable of supporting driving at the moment is calculated; and the vehicle control unit VCU coordinates the driving system and the braking system to control the maximum vehicle speed to be V.

    本发明提供了一种电动四驱车型单电机故障的跛行控制方法及系统,其中,所述方法包括以下步骤:车辆启动后,整车控制器VCU检测四驱动力系统是否存在故障;当检测到单前电机或单后电机系统存在故障时,根据坡道工况智能调整车速,进入跛行模式;进入跛行模式后,计算单前电机或单后电机允许的最大转速n1并输入给整车控制器;整车控制器VCU获取当前车辆的行驶信息,计算动态坡度对应正常电机允许的最大转速;计算最大转速下对应故障电机的转速n2;比较n1和n2大小并取小,计算此时整车能支持行驶的最大车速V;整车控制器VCU协调驱动系统及制动系统控制最高车速为V。


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    Title :

    Limp control method and system for single motor fault of electric four-wheel drive vehicle


    Additional title:

    一种电动四驱车型单电机故障的跛行控制方法及系统


    Contributors:
    YOU DAOLIANG (author) / YANG KEWEN (author) / GUO MINGJUN (author) / XU SHIHUA (author) / LUO XUWEI (author)

    Publication date :

    2025-04-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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