The invention discloses a speed limit control method for an electric automobile. The methodwhich comprises the following steps: S1, measuring and collecting vehicle speed information, and filtering the vehicle speed by using a low-pass filter; S2, determining the state mode of an automobile drive control system, when the automobile drive control system is in a driving mode, performing S3; and whenthe automobile drive control system is in a reversing mode, performing S4; S3, carrying out calculating to obtain a whole vehicle driving allowable driving torque under the driving speed limiting working condition, and adjusting a driver request torque according to the whole vehicle driving allowable driving torque to realize driving speed limitation; and S4, carrying out calculating to obtain awhole vehicle reversing allowable driving torque under a reversing speed limiting working condition, and adjusting the driver request torque according to the whole vehicle reversing allowable drivingtorque to realize reversing speed limiting. According to the method, limitation of the torque allowed to be output under the speed limiting working condition is achieved, a problem that a driver still requests high torque to cause overspeed under the condition that the vehicle is about to overspeed is solved, the vehicle overspeed condition is effectively avoided, and the safety in the vehicle running process is improved.
本发明揭示了一种电动汽车限速控制方法,包括如下步骤:S1、测量采集车速信息,使用低通滤波器对车速进行滤波处理;S2、判断汽车驱动控制系统的状态模式,当处于行车模式时,跳转进入S3,当处于倒车模式时,跳转进入S4;S3、计算获得行车限速工况下的整车行车允许驱动扭矩,并据此对驾驶人员请求扭矩进行调整,实现行车车速限制;S4、计算获得倒车限速工况下的整车倒车允许驱动扭矩,并据此对驾驶人员请求扭矩进行调整,实现倒车车速限制。本发明的方法实现了在限速工况下对允许输出的扭矩的限制,考虑到驾驶人员在车辆即将超速的情况下仍然请求较高扭矩导致超速的问题,有效地避免了车辆超速的情况,提升了车辆行驶过程中的安全性。
Speed limit control method for electric automobile
电动汽车限速控制方法
2020-05-12
Patent
Electronic Resource
Chinese
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