基于滑移率的CVT夹紧力控制策略研究-《郑州大学学报(工学版)》

文章信息/Info

Title:: Research on Clamping Force Control Strategy in CVT Based on Slip Ratio

Author(s):: Yuan Xiaohong; Chen Long; Wang Yiping; Hubei Provincial Key Laboratory of Modern Auto Parts Technology, Wuhan University of Technology, Wuhan, Hubei 430070

摘要:: 为了研究金属带式无级变速器的夹紧力控制问题,对传统的夹紧力控制策略进行改进.通过分析金属带与带轮的滑移机理,对滑移现象进行描述;研究滑移率对带轮传动的影响,并利用试验数据建立数学模型.利用AMESim和Simulink建立联合仿真模型,结合仿真结果对比新的控制策略与传统的控制策略.仿真结果表明:采用新的控制策略后,夹紧力降至原有的85％～90％;节气门开度从10％增加至50％的过程中,采用滑移控制的CVT的传动效率维持在80％～85％;在极限工况下,滑移率控制会产生一定程度的滑移率波动,需要进一步改善.

Abstract:: The clamping force control of continuously variable transmission was studied,and the traditional force control strategy was improved.The slip mechanism of metal belt and pulley was analyzed,with the description of the slip phenomenon.The influence of slip ratio on the belt wheel drive was studied,and the mathematical model was established by the test data.The combined simulation model based on AMESim and Simulink was established.Combined with simulation results,the new control strategy and the traditional control strategy are compared.The simulation results showed that the clamping force was reduced to the original 85％-90％ with the new control strategy.The new control strategy made transmission efficiency maintained between 80％ to 85％,with throttle opening increased from 10％ to 50％.In extreme conditions,the slip rate control would produce a certain degree of slip rate fluctuations,which might need further improvement.