The embodiment of the invention discloses a vehicle speed control method and device for low-speed running of an electric vehicle, and the method comprises the steps: controlling the vehicle to start and move in a static state of the vehicle, and calculating and determining a first vehicle speed based on the rotating speed of a driving motor, the rotating speed of driving wheels and the rotating speed of driven wheels; if the first vehicle speed is lower than the set speed threshold value, first integral torque is determined through integral control, and the first integral torque serves as total driving torque to control the vehicle to run; if the first vehicle speed is not lower than the set speed threshold, calculating and determining a second vehicle speed based on the rotating speed of the driving motor; and performing variable-speed integral control based on the second vehicle speed, and determining a total driving torque based on a variable-speed integral control result to control the vehicle to run. According to the scheme, low-speed running of the vehicle is divided into different control stages, control of the different control stages can adapt to the problems that a sensor is inaccurate, starting resistance changes and the like under the low-speed running working condition to a certain degree, and low-speed stable running of the vehicle is achieved.

    本申请实施例公开了一种电动汽车低速行驶的车速控制方法及装置,方法包括:在车辆静止状态下控制车辆起步移动,并基于驱动电机转速、驱动轮转速和从动轮转速计算确定第一车速;若第一车速低于设定速度阈值,采用积分控制确定第一积分扭矩,并将第一积分扭矩作为总驱动扭矩控制车辆运行;若第一车速不低于设定速度阈值,基于驱动电机转速计算确定第二车速;基于第二车速进行变速积分控制,并基于变速积分控制的结果确定总驱动扭矩控制车辆运行。上述方案将车辆的低速行驶分别为不同的控制阶段,不同控制阶段的控制能够在一定程度上适应低速行驶工况下传感器不准确、起步阻力变化等问题,实现车辆的低速稳定行驶。


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    Title :

    Vehicle speed control method and device for low-speed driving of electric vehicle


    Additional title:

    一种电动汽车低速行驶的车速控制方法及装置


    Contributors:
    WANG YUAN (author) / DU YI (author) / WANG XIAOBIN (author) / ZHANG SHUNKAI (author)

    Publication date :

    2024-04-30


    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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