纯电动大客车电动液压助力转向系统的助力研究  

Research on Assist Steering of Electro Hydraulic Power Steering System of Electric Vehicle

作　　者：刘文光[1] 何仁[1] 游专[1] 陈峰[1] 张中帆 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013 [2]常隆客车有限公司,江苏无锡214432

出　　处：《液压与气动》2014年第4期38-40,44,共4页Chinese Hydraulics & Pneumatics

基　　金：江苏省科技成果转化资金项目(BA2010050);江苏省汽车工程重点实验室开放基金项目(QC201003);江苏大学人才基金资助项目(11JDG077)

摘　　要：针对纯电动大客车电动液压助力转向系统受轮胎气压、车速的影响,依据汽车操纵动力学、多刚体动力学,建立考虑车速和轮胎气压的动态转向力矩模型,利用模糊PID控制因车速和轮胎气压变化对转向助力的影响,并对汽车电动液压转向助力系统的数据进行实验分析。实验结果表明,通过车速和轮胎气压调节转向助力的油压,能实现助力大小的自适应变化,提高了汽车行驶的稳定性和转向轻便性。For the change of tire pressure or speed impacting the assist steering of the electro hydraulic power steering system （EHPS） of the electric vehicle,according to the vehicle handling dynamics and multi-body dynamics,the dynamic steering torque model considered the change of the speed and tire pressure was established.The fuzzy PID control method was used to control the assist steering of EHPS.Experiment data of EHPS was analyzed.The results show that adjusting the oil pressure of EHPS by speed and tire pressure can achieve the adaptive change of the assist steering.This method can enhance the stability of the driving vehicle and steering portability.

关 键 词：车速 轮胎气压 转向助力 电动液压助力转向系统 

分 类 号：TH137[机械工程—机械制造及自动化] U463.4[机械工程—车辆工程]