The transmission of power from the engine to the gearbox is carried out by means of a clutch. It works solely by friction, and this can be imagined as follows: two adjacent surfaces clamp a third and hold it with such force that it must rotate with them. The main thing is that this connection can be broken at any time, otherwise both parts could be screwed together. Let's call these parts: a flywheel and a pressure plate under spring load are permanently connected to the engine. A driven disk is clamped between them, which is permanently connected to the gearbox shaft.
Another important function is performed by the central clutch release module (with clutch release bearing): When the clutch pedal is depressed by the clutch cable, the central clutch release piston is pressed against the pressure plate by hydraulic pressure and to a certain extent assumes the force of the pressure plate spring. As a result of this, the driven disk is released from its forced position and can rotate freely between the pressure disk and the flywheel. The power flow from the engine to the gearbox is interrupted.
If the clutch pedal is released again, then the Belleville spring again presses the driven disk against the flywheel, the free movement of the disks disappears. All three parts again represent a strong power connection. The power flow can be transferred from the motor to the drive.
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