汽车无级变速器夹紧力动态安全系数控制研究  

Study on the Dynamic Safety Sactor Control of Clamping Force of Automotive Continuously Variable Transmission

作　　者：张伯俊[1] 王谦[1] 郝允志[2] 

机构地区：[1]天津职业技术师范大学,天津300222 [2]西南大学,重庆400715

出　　处：《机械传动》2015年第3期45-49,共5页Journal of Mechanical Transmission

摘　　要：安全系数法和滑移率法是汽车无级变速器夹紧力控制方法的两个极端。为了综合两者的优点,提出了基于动态安全系数的夹紧力控制方法。分析目标夹紧力影响因素和发动机转矩波动特性,根据传动系统发生转速突降时的发动机转矩变化趋势和变化范围来设定安全系数,论述了动态安全系数法的计算流程。对汽车由冰雪路面进入水泥路面的极端工况进行仿真,结果表明动态安全系数法能够保证转矩传递的可靠性。循环工况仿真结果表明,动态安全系数法使平均夹紧力降低约20%,实现节油约3%。Traditional constant safety factor method and novel slip-control method are extreme different methods of clamping force control strategy for continuously variable transmission（CVT）.To integrate advantages of both methods,clamping force control strategy base on dynamic safety factor is presented.Analysis of the theoretical clamping force relevant parameters and engine torque wave characteristics is carried out.The safety factor is determined according to engine torque variation trend and range.The calculating process of dynamic safety factor method is described.The simulation and experiment results show that,by adopting dynamic safety factor method,the transmission reliability is ensured.The performances of clamping-force and fuel efficiency are improved.Especially,the clamping force reduced about 20%,the economical efficiency increased about 3%.

关 键 词：无级变速器 夹紧力 安全系数 控制 

分 类 号：U463.2[机械工程—车辆工程]