Wonsik Lim

A Study on the Speed-based Active Compensation of the Kiss-Point of Dry-type Clutch Equipped with Automated Manual Transmission

Abstract : Clutch torque control is the key to the ride comfort improvement of a vehicle equipped with AMT (automated manual transmission). For such control, the torque transfer starting point, known as the “kiss point,” should be indicated or at least estimated to compensate for the clutch torque. The kiss point changes due to wear, high temperature, and fatigue; as such, it should be estimated while the vehicle is being driven. In this study, the method of kiss point active estimation for an AMT vehicle with a dry-type clutch was devised. The kiss point is learned while the engine is in an idle state and while the transmission is at a neutral gear position. It is determined when the input shaft of the transmission starts to rotate by slowly engaging the clutch. The noise of the shaft speed signal during the slow engagement process is filtered for accurate control. The kiss point estimation at various clutch engagement speeds was analyzed via a vehicle test. Key words : Kiss-Point(키스 포인트), Touch point(접촉점), Automated manual transmission(자동화수동변속기), Dry-type clutch(건식클러치), Estimation(추정), Heavy duty vehicle(중 부하 차량)