关键词: 离合器踏板高度；离合器操纵装置；液压油流动阻力

Abstract: In the process of debugging and using a light truck, the clutch pedal combination height is sometimes high and sometimes low, and the clutch combination is not smooth. In order to solve the problem, we need to find out the cause of the problem and avoid it happening again in other models. The existing calculation method is to calculate the minimum separation stroke of the clutch pedal, and then compare with the total stroke of the clutch pedal, leaving a reasonable margin to obtain a comfortable clutch pedal engagement height. Obviously, this calculation method can not explain the fault phenomenon. It is also necessary to analyze the movement and force of all relevant parts and hydraulic oil in clutch control device. This paper starts with the flow resistance of the hydraulic oil in the clutch pipeline, finds out the cause of the fault by the method of test and theoretical calculation and analysis, and puts forward the method of troubleshooting. After practical application, it can solve the problem of abnormal clutch pedal combination height.

Key words: Clutch pedal height; Clutch control device; Hydraulic oil flow resistance