Automotive Manual Transmission Clutch System Modeling for Foot Effort Hysteresis Characteristics Prediction

자동차 수동 변속기 클러치 시스템의 답력 이력 특성 예측 모델

  • Lee, Byoung-Soo (Faculty of Mechanical and Automotive Engineering, Keimyung University)
  • 이병수 (계명대학교 기계자동차공학부)
  • Published : 2008.09.01


A typical clutch system for automotive manual transmissions transfers hydraulic pressure generated by driver's pedal manipulation to the clutch diaphragm spring. The foot effort history during the period of push is different than the period of the clutch pedal's return. The effort or load difference is called clutch foot effort hysteresis. It is known that the hysteresis is caused by friction. The frictional force and moment are produced between various component contact points such as between the rubber seal and the inner wall inside the hydraulic cylinder and between the diaphragm spring and the pressure plate, etc. Understanding the clutch pedal foot effort hysteresis is essential for a clutch release system design and analysis. The dynamic model for a clutch release system is developed for the foot effort hysteresis prediction and a simulation analysis is performed to propose a tool for analysing a clutch system.


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