Industry News

The function and working principle of automobile Clutch System

2021-07-31

We usually refer to the clutch refers to manual transmission models, in fact, there is also a Clutch System inside the automatic transmission, but its structure and working principle and this has a big difference. The Clutch System is mainly composed of four parts: the active part, the driven part, the pressing part and the control mechanism. We usually say that the clutch belongs to the driven part. Its working principle is also very simple, is to rely on the principle of friction transfer engine power. When there is a gap between the driven disk and the flywheel, the flywheel can not drive the driven rotating, the clutch is in a state of separation; When the pressure force pushes the driven disc to the flywheel, the friction force of the flywheel surface to the driven disc surface drives the driven rotation, and the clutch is engaged. A diaphragm clutch is commonly used in cars today. 

The working process of Clutch System can be divided into separation process and engagement process. In the process of separation, the clutch pedal is pressed down, and the free clearance of the clutch is first eliminated in the free stroke, and then the separation clearance is generated in the working stroke, and the clutch is separated. In the process of engaging, gradually release the clutch pedal, pressure plate moving forward under the action of the pressure spring, the first to eliminate the separation gap, and in the pressure plate, driven disk and flywheel working surface enough pressure force; Then the separation bearing moves backward under the action of the return spring, creating a free clearance, and the clutch engages. 

The common faults of the Clutch System are clutch slip, clutch separation is not complete, the clutch abnormal sound, shaking when starting, etc., these faults need to disintegrate the Clutch System for maintenance. Its service life and the driver's operation and use habits have a great relationship, the gap is also very large, some can do hundreds of thousands of kilometers without replacement, some thirty twenty thousand kilometers on the replacement, it can also be said that the service life of the clutch is a driver driving level of an evaluation standard.