Diaphragm spring
| Item | Description |
|---|---|
| 1 | Clutch release bearing |
| 2 | Diaphragm spring tongues |
Role of the diaphragm spring
The diaphragm spring acts as a transfer element between the clutch cover and the pressure plate.
Function of the diaphragm spring
A spring steel disc which has multiple slots and is slightly tapered towards the middle connects the clutch cover to the pressure plate. As a result of the preload of the spring steel disc, the pressure plate is pressed against the clutch disc when the clutch is engaged. To disengage, the release bearing presses against the pressure plate diaphragm spring tongues and pulls the pressure plate back and releases the clutch disc from the flywheel.
This design produces the greatest contact forces at the pressure point. If the clutch pedal is pressed beyond this point, the pressing forces are reduced by a diaphragm spring rather than coil springs.