The invention discloses an electric vehicle parking gear control method and system, and the method comprises the steps that a shifter transmits a first control signal that a parking gear switch is turned on and a gear request is a parking gear to a vehicle control unit through a CAN bus when the parking gear is pressed to be placed into the parking gear; after receiving the first control signal, the vehicle control unit judges whether the vehicle has a braking request, whether the vehicle speed is smaller than a preset speed and whether the motor speed is smaller than the preset speed; if yes,the vehicle control unit sends a P-gear locking request control signal; the parking gear controller outputs a high level through a hard wire to drive the motor to lock the motor speed reducer, and sends a control signal that the parking gear lock state is locked through a CAN bus; and the vehicle control unit responds to the gear position to enter the parking gear, and sends a control signal thatthe gear state is the parking gear through the CAN bus. Reliable P-gear control can be achieved in the electric automobile, the parking reliability is improved, and the safety of the automobile in the gear shifting and starting process is improved.
本发明公开了一种电动汽车驻车挡控制方法及系统,该方法包括:当驻车挡被按下以置入驻车挡时,换挡器通过CAN总线向整车控制器发送驻车挡开关状态为开启、且挡位请求为驻车挡的第一控制信号;整车控制器接收到第一控制信号后,判断车辆是否有制动请求、车辆车速是否小于预设速度、电机转速是否小于预设转速;若是,则整车控制器发送P挡锁止请求控制信号;驻车挡控制器通过硬线输出高电平驱动电机锁止电机减速器,并通过CAN总线发送驻车挡锁状态为锁止的控制信号;整车控制器响应挡位置入驻车挡,并通过CAN总线发送挡位状态为驻车挡的控制信号。本发明能够在电动汽车中实现可靠的P挡控制,增加驻车可靠性,提升车辆换挡、启动过程中的安全性。
Electric vehicle parking gear control method and system
电动汽车驻车挡控制方法及系统
30.06.2020
Patent
Elektronische Ressource
Chinesisch
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