重型车流量控制式ECHPS操控性与节能性研究  

The Research of Heavy-Duty Vehicles in Terms of Maneuverability and Energy Efficiency

作　　者：周泽磊[1] 江浩斌[1] 钱洋[1] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《机械设计与制造》2014年第10期88-91,共4页Machinery Design & Manufacture

基　　金：江苏省属高校自然科学研究重大项目(11KJA580001)

摘　　要：目前应用于重型商用车辆的传统液压助力转向(HPS)系统,普遍存在转向轻便性与路感之间的矛盾和燃油消耗大等问题。为了兼顾重型商用车辆的操控性与节能性,提出一种旁通流量控制式电控液压助力转向(ECHPS)系统。建立了ECHPS机械和液压子系统模型及整车三自由度动力学模型,从能量流角度研究了ECHPS系统能量消耗。通过分析转向系统可变助力特性的设计要求,设计了抛物线型ECHPS可变助力特性。仿真结果表明:与传统HPS系统相比,所提出的ECHPS不仅同时满足了低速时的转向轻便性和高速时的良好路感,实现了良好的操稳性,且节能效果较好。A bypass flow-controlled ECHPS was introduced, for the problem of poor load feeling in high speed and high energy consumption caused by HPS with fixed assist characteriztics applied in heavy commercial vehicles. Mechanical and hydraulic subsystem models for bypass flow-controlled ECHPS and 3-DOF whole vehicle model were established. Energy consumption of the ECHPS system was analyzed based on energy flow, the energy consumption model was established. The parabolic alterable assist characteristics of the steering system was designed by analysing the requirements. The results show that, compared with conventional HPS system, the proposed ECHPS could not meet the low speed steering agility and good road feel at high speed, and achieve a good energy efficiency.

关 键 词：重型车辆 旁通流量控制 可变助力特性 节能性 

分 类 号：TH16[机械工程—机械制造及自动化] U463.4[机械工程—车辆工程]