某轿车离合器不平整度引起的爬行抖动研究

某轿车采用双离合变速器,在起步爬行工况存在明显的整车抖动现象,并且导致变速器异响。本文通过试验分析手段发现整车抖动频率与发动机转速、输入轴转速以及转速差相关,结合离合器颤振的发生机理和发生条件,得出离合器执行过程中压力变化引起的颤振是整车爬行抖动的主要原因,离合器压力变化主要与本身结构参数—离合器不平整度(MGF)相关,通过整车试验方法和主观评价方法分析不同的离合器MGF值对整车抖动的影响,从而获得最优MGF值,有效解决该车抖动问题。

The Study on Creeping Judder Caused by Clutch Unevenness

An obvious judder phenomenon happens when the vehicle with dual clutch transmission is creeping,which leads to abnormal noise of the transmission.By means of test analysis,it is found that the frequency of vehicle judder is related to engine speed,input shaft speed and speed difference.According to the mechanism and conditions of clutch judder,it is concluded that the main cause of vehicle creeping judder is the clutch pressure change which mainly related to body structure parameters-clutch unevenness(MGF).The influence of different clutch MGF values on vehicle judder is analyzed by vehicle test method and subjective evaluation method.The optimal MGF value is obtained and the vehicle judder problem is effectively solved.