汽车电动助力转向系统改装技术研究  

Research of refit technology on electric power steering

作　　者：程寿国[1] 陈小龙[1] 

机构地区：[1]江阴职业技术学院机电系,江苏江阴214405

出　　处：《机电工程》2013年第3期314-317,共4页Journal of Mechanical & Electrical Engineering

摘　　要：为解决传统液压助力转向系统引起的易漏油、结构复杂、拆卸困难等问题,以一种轻型车为试验样车,将电动助力转向技术应用到试验样车的转向系统中,从而替换原有的液压助力转向系统。以试验样车为研究对象,分析了原车的液压助力转向系统与电动助力系统之间的区别与联系,参考原车液压助力转向曲线,并通过分析计算地面最大阻力矩、最大助力转矩等实车参数,建立了针对电动助力转向系统的助力曲线,并确定了电动助力转向系统中电动机、减速机构、控制器、扭矩传感器等关键部件的主要参数;将关键部件组装为电动助力转向系统,并对实验样车做了改装,对改装后的样车进行了蛇形路面试验,并采集了试验过程中的助力电流与人手转矩的对应关系曲线。研究结果表明:改装后的电动助力转向系统可实现随速助力,并有一定的路感,转矩脉动小,具有较好的转向平顺性。Aiming at resolving the problems of leaking, complicated structure, and not easy to assembling or disassembling on hydraulic power steering （HPS）system, a light vehicle acting was used as prototype vehicle, the electric power steering （EPS）technology was introduced to replacing the HPS. After the analysis of the prototype vehicle, the relationship between the hydraulic power steering system and the electric power steering system was established. The assistance characteristics curve of EPS was designed, and the key parameters of the motor,the gearbox, the ECU and the torque sensor of EPS were defined by references of the assistance characteristics curve of HPS, the analysis and calculation of the ground maximum moment resistance and the biggest assistance torque of HPS. The relations between the assistance curve and the manual torque were tested after the snake-like road experiment on the refitted vehicle with EPS. The results indicate that the EPS system can replace the traditional hydraulic steering system for its smooth operation, realize the of assistance power change by vehicle velocity, good ride comfort and good ride feeling.

关 键 词：电动助力转向系统 汽车 改装 液压助力转向系统 

分 类 号：TH39[机械工程—机械制造及自动化] U463.4[机械工程—车辆工程]