The clutch connects and disconnects the engine from the gearbox (transmission) allowing smooth gearchange and control of the engine power.
A clutch plate (driven plate) is coated on both sides with a hard wearing high friction material. This is situated between the engine flywheel and a spring loaded pressure plate. The spring/pressure can be released by depressing the clutch pedal.
While driving, the whole clutch assembly can be turning at very high speeds. To allow a non rotating clutch pedal to control the rotating clutch assembly a clutch release bearing uses a fork acting on a thrust face
The clutch has to transmit the engine power to the wheels allowing the vehicle to move. The torque of the engine is transferred by the clutch system relying entirely on the contact friction between 2 faces. A slipping clutch occurs when the friction is too low (often due to clutch wear) or engine torque is too high (during rapid acceleration)
The torque capacity (how much power can be transmitted without slipping) depends upon:
In order to use greater engine torque in high performance vehicles a multi-face clutch may be used compared to the single plate clutch system adopted on most cars.
A car clutch is engaged/disengaged using the left most "clutch" pedal.
The clutch pedal is depressed to disengage the engine from the gearbox and drive train while changing gears. Once the gear is selected, the clutch pedal is released and the engine is once-again linked via the drive train
The clutch operation can be actuated by:
Alternator service for North East England
Dual-Mass Flywheels are fitted in many light commercial vehicles covering very high mileages requiring regular clutch replacement.
New clutches fitted to most makes of cars using the recommended clutch kits