Working principle of automobile clutch
The clutch is located in the flywheel housing between the engine and the gearbox. The clutch assembly is fixed on the rear plane of the flywheel with screws. The output shaft of the clutch is the input shaft of the gearbox. During the driving of the car, the driver can step on or release the clutch pedal as needed to temporarily disengage and gradually engage the engine and the transmission to cut off or transfer the power input from the engine to the transmission.
The working principle of the clutch The friction between the active part and the driven part of the clutch surface, or use liquid as the transmission medium (hydraulic coupling), or use magnetic transmission (electromagnetic clutch) to transmit torque, so that the two They can be temporarily separated and gradually joined together, allowing the two parts to rotate with each other during transmission. At present, a friction clutch (referred to simply as a friction clutch) pressed by a spring is widely used in automobiles. The torque generated by the engine is transmitted to the driven plate through the friction between the flywheel and the contact surface of the pressure plate and the driven plate. When the driver depresses the clutch pedal, the large end of the diaphragm spring drives the pressure plate to move backward through the transmission of the mechanical parts. At this time, the driven part is separated from the active part. The friction clutch should be able to meet the following basic requirements: (1) Ensure that the maximum torque transmitted by the engine can be transmitted, and that there is a certain torque residual force. (2) When it can be separated, it can be completely separated, soft when it is joined, and has good heat dissipation ability. (3) The inertia of the driven part should be as small as possible. In this way, when the clutch is shifted, the rotation speed of the part connected to the input shaft of the transmission is relatively easy to change, thereby reducing the impact between the gears. (4) It has the ability to mitigate the impact in the direction of rotation and attenuate the vibration in this direction, and the noise is small. (5) The pressure plate pressure and the friction coefficient of the friction plate change little, and the work is stable. (6) Easy operation and convenient maintenance.
The flywheel of the engine is the active part of the clutch. The driven disc and hub with friction plates are connected to the driven shaft (that is, the input shaft of the transmission) by splines. When the clutch is engaged, the disc friction plate of the driven disc and the rear end surface of the flywheel are pressed by the spring force, and the engine power is transmitted through the friction of the surfaces of the two.
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