新能源汽车的电控液压制动系统设计

Design of Electronic Hydraulic Braking System for New Energy Vehicles

为提升新能源汽车液压制动力矩的控制精度,提出一种电控系统,包括由电磁阀、蓄能器、柱塞泵和电机等组成的调压单元和由主液压缸、电控制动助力器等组成的建压单元。针对液压制动回路的结构特点,确立反馈调节流程和压力控制方案。通过测试得出液压缸有杆腔压力和伺服阀输出压力变化特性,结果表明,该电控系统能够将压力偏差控制在5%以内,有效降低压力的波动性。

In order to improve the control accuracy of hydraulic braking torque of new energy vehicles,an electronic control system is proposed,including a pressure regulating unit composed of solenoid valve,accumulator,plunger pump and motor and a pressure building unit composed of main hydraulic cylinder and electronic brake booster.According to the structural characteristics of hydraulic braking circuit,the feedback regulation process and pressure control scheme are established.The test results show that the electronic control system can control the pressure deviation within 5%and effectively reduce the pressure fluctuation.