The invention relates to a pure electric vehicle overspeed control method and a device. The method comprises the steps that firstly, the real-time vehicle speed of a vehicle is collected; if the real-time vehicle speed is larger than or equal to a set value, the braking torque of a motor at the current rotating speed is distributed to a driving motor for braking; wherein a safe vehicle speed is greater than the set value; the values of the real-time vehicle speed and the safe vehicle speed are compared continuously; if the real-time vehicle speed is larger than or equal to the safe vehicle speed, the brake pedal opening degree is controlled to be increased, and the brake pedal opening degree is further increased along with increasing of the vehicle speed; wherein the safe vehicle speed ofthe vehicle is calculated according to a motor rotating speed and vehicle parameters. That is to say, under the condition of going down a long slope, even if the braking torque of the motor is distributed to the driving motor for braking, the situation that the vehicle speed continues to be increased exists, overspeed is effectively limited by controlling the brake pedal opening degree, and the problem that a vehicle is unsafe in the running process is solved.

    本发明涉及一种纯电动车辆超速的控制方法及装置,其首先是采集车辆的实时车速;若实时车速大于等于设定值,则将当前转速下电机的制动力矩分配给驱动电机进行制动;其中,安全车速>设定值;继续判断实时车速与安全车速的大小;若实时车速大于等于安全车速,则控制制动踏板开度增加,随着车速的增加进一步增加制动踏板开度;所述车辆的安全车速根据电机转速和车辆参数计算得到。即本发明在下长坡的情况下,即使将电机的制动力矩分配给驱动电机进行制动,也存在车速继续增加的情况,通过控制制动踏板的开度,有效限制超速,避免了车辆行驶中不安全的问题。


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    Title :

    Pure electric vehicle overspeed control method and device


    Additional title:

    一种纯电动车辆超速的控制方法及装置


    Contributors:
    LU JIAHUA (author) / MA YING (author) / GUO XIAORAN (author) / XIE JUNFENG (author)

    Publication date :

    2020-04-21


    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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