The main function of a car clutch disc (friction disc) is to transfer torque and rotational power from the engine flywheel Torque Transmission: It grips the rotating engine flywheel (via the pressure plate's clamping force) so engine rotation passes directly into the gearbox and wheels.
• Power Disconnection: When you press the clutch pedal, the pressure lifts off, allowing the disc to spin independently. This breaks power flow so you can safely shift gears or stop without stalling.• Smooth Engagement: Its friction linings and wave (cushioning) springs let the engine and transmission lock up gradually rather than slamming together vio• Vibration and Shock Damping: Built-in torsional coil springs absorb crankshaft vibrations, sudden power spikes, and driveline shocks to protect the gears and keep the ride smooth.