不同助力形式的制动系统制动性能仿真分析

Simulation Analysis of Braking Performance of Braking System with Different Power Assisted Forms

随着汽车电动化、智能化的发展,制动系统的助力形式发生了巨大变化。文中建立了搭载真空助力器、电动助力器和集成式制动系统的车辆模型,在驾驶员模式下和主动建压模式下进行动态仿真分析,对不同制动系统的车辆制动性能表现进行了对比分析。仿真结果表明,电动助力器和集成式制动系统主动建压可以减少驾驶员反应时间,制动距离也更短;在ABS作用时,集成式制动系统卡钳处管路压力波动更小,地面附着利用率更高;电动助力器和集成式制动系统的制动性能受控制逻辑和系统电压影响较大,特别是集成式制动系统对系统电压变化较为敏感。

With the development of electric and intelligent vehicles,the power assisted form of braking system has changed greatly.In this paper,the vehicle model equipped with vacuum booster,electric booster and integrated braking system is established.The dynamic simulation analysis is carried out in driver mode and active pressure building mode.The braking performance of vehicles with different braking systems is compared and analyzed.The simulation results show that the active pressure building of electric booster and integrated braking system are able to reduce the driver’s reaction time and shorten the braking distance.When ABS is triggered,the pipeline pressure fluctuation at the caliper of the integrated brake system is small,and the ground adhesion coefficient can be better utilized.The braking performance of electric booster and integrated braking system is greatly affected by control logic and system voltage.The integrated braking system is more sensitive to the voltage change of system.