What is the Principle of an Automotive Clutch?

[StMadelyn]

The working principle of an automotive clutch is as follows: 1. Disengagement when the clutch is depressed: When starting the vehicle, depressing the clutch pedal pulls the pressure plate backward, causing it to separate from the friction disc. At this point, the pressure plate does not contact the flywheel, so there is no relative friction. 2. Full engagement when the clutch is not depressed: During normal driving, the pressure plate presses against the friction disc of the flywheel, creating maximum friction between them. The input and output shafts maintain relative static friction, rotating at the same speed. 3. Partial engagement when the clutch is partially depressed: The friction between the pressure plate and the friction disc is less than in full engagement. The pressure plate and the friction disc on the flywheel are in a state of sliding friction, with the flywheel rotating faster than the output shaft. Part of the power transmitted from the flywheel is delivered to the gearbox. This state is equivalent to a soft connection between the engine and the drive wheels.