The transmission of power from the engine to the gearbox is carried out by the 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 release bearing: when the clutch pedal is depressed, by actuating the clutch, it is pressed against the pressure plate 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 pedal is released again, the disc spring of the pressure plate presses the driven plate against the flywheel, the free movement of the discs disappears. All three parts are a strong power connection. The power flow can be transferred from the motor to the drive.
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