摘要
对电动汽车真空助力系统进行建模仿真,分析了踏板行程与真空度消耗关系、不同真空度条件下助力器的输出性能关系、真空泵响应是否满足助力器等问题,仿真结果显示,助力器输出力与踏板输入力相协调,符合制动要求。真空泵抽速、启停真空度、罐体大小与真空助力器的需求搭配合理。制动主缸液压压力满足制动强度需求。在连续制动时,真空罐内真空度变化规律性好,每次制动前真空罐真空度环境一致。
The article studied the modeling and simulation of the vacuum booster system of electric vehicles,and analyzed the relationship between pedal stroke and vacuum consumption,the relationship between the output performance of the booster under different vacuum conditions,and whether the response of the vacuum pump meets the booster.The simulation results show that the output force is coordinated with the pedal input force and meets the braking requirements.The vacuum pumping speed,start-stop vacuum degree,tank size and vacuum booster requirements are reasonably matched.The hydraulic pressure of the brake master cylinder meets the requirements of braking intensity.During continuous braking,the vacuum degree in the vacuum tank changes regularly,and the vacuum degree environment of the vacuum tank is consistent before each braking.
出处
《时代汽车》
2021年第1期72-74,共3页
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关键词
电动汽车
真空助力
制动
仿真
electric vehicle
vacuum assist
braking
simulation
