摘要
为了兼顾装备E-ECHPS助力转向系统的大客车的操纵稳定性与节能性,设计了基于按需功率匹配的E-ECHPS助力转向系统助力特性。通过试验测量了驾驶员偏好的方向盘转矩,通过仿真得到了不同车速下的转向阻力矩变化规律。根据后向按需功率匹配原理,得到了所需克服的转向阻力矩与电磁转差离合器(ESC)输入电流之间的关系,通过改变ESC输入电流进而改变液压泵转速,以实现输出助力跟随转向阻力矩的变化。与传统的HPS相比,具有按需功率匹配助力特性的E-ECHPS实现了良好的操纵稳定性和节能性。同时,将该助力特性与传统助力特性进行对比,结果表明,基于按需功率匹配的助力特性对地面附着系数的变化具有良好的跟随性,增强了车辆的操纵安全性。
In order to balance stability and energy saving of bus with E-ECHPS system, designed a power-assisted charocteristic of E-ECHPS system based on power matching Measured the steering wheel torque of drivers＇preference, and through the analysis of models of vehicle and steeringtorque resistance to obtain the steering torque resistance in d^erent speed. Gaining the relationship between steering torque resistance and electromagnetic slip clutch （ESC） input current by offer matching of power matching The speed of Hydaulic pump is changed by imput current of ESC, it makes the output power followed by the change of steering torque resistance. Compared with traditional HPS, E-ECHPS with this power-assisted characteristic has good stability and energy savingpe（farmance. Meanwhile, compared with traditional characteristic by simulation, the characteristic shows good following to random variation of surface friction coefficient that can enhance manoeuvring safety.
出处
《机械设计与制造》
北大核心
2017年第5期145-148,共4页
Machinery Design & Manufacture
基金
国家自然科学基金项目(51275211)
江苏省科技成果转化专项资金项目(BR2015168)
江苏大学高级人才科研启动基金资助项目(15JDG093)
江苏省高校自然科学基金(14KJB580003)
