Braking force control system of electric vehicle
    4.
    发明授权
    Braking force control system of electric vehicle 失效
    电动车制动力控制系统

    公开(公告)号:US5716108A

    公开(公告)日:1998-02-10

    申请号:US534698

    申请日:1995-09-27

    摘要: A braking force control system of an electric vehicle includes a regenerative-controllable motor for driving driven wheels, wheel cylinders for braking non-driven wheels, respectively, and a master cylinder connected to a brake pedal for producing a master cylinder pressure in proportion to a depression amount of the brake pedal. A mechanical braking force control unit is further provided in a working fluid passage from the master cylinder and the wheel cylinders. The mechanical braking force control unit includes a proportioning valve and a free-piston cylinder arranged in parallel with each other in the working fluid passage. The proportioning valve is operated to output a wheel cylinder pressure to the wheel cylinders when the depression amount of the brake pedal is no more than a given value. On the other hand, the free-piston cylinder is operated to output a wheel cylinder pressure to the wheel cylinders when the depression amount of the brake pedal is more than the given value. A motor control unit is further provided to perform a regenerative control of the motor for achieving a regenerative braking force which is equal to a difference between a target total braking force derived based on the depression amount of the brake pedal and a mechanical braking force derived based on the wheel cylinder pressure outputted from the mechanical braking force control unit.

    摘要翻译: 电动车辆的制动力控制系统包括用于驱动从动轮的再生可控电动机,用于非驱动轮制动的车轮缸和连接到制动踏板的主缸,用于与主缸压力成比例地产生 制动踏板的抑制量。 机械制动力控制单元还设置在从主缸和轮缸的工作流体通道中。 机械制动力控制单元包括在工作流体通道中彼此平行布置的配比阀和自由活塞缸。 操作比例阀,当制动踏板的下压量不大于给定值时,将轮缸压力输出到轮缸。 另一方面,当制动踏板的踩踏量大于给定值时,自由活塞气缸被操作以向轮缸输出轮缸压力。 还设置有电动机控制单元,用于对电动机进行再生控制,以实现再生制动力,该再生制动力等于基于制动踏板的下压量导出的目标总制动力与基于制动踏板的机械制动力 在从机械制动力控制单元输出的轮缸压力上。