Clutch

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Clutch

  1. 1. Functions  Allows the driver to couple /uncouple the engine from the transmission while shifting gears/ starting vehicle from rest
  2. 2. Clutch components- Pressure Plate     Applies pressure to the clutch disc for the transfer of torque to the transmission Pressure is generated by spring (static) pressure The pressure plate, when coupled with the clutch disc and flywheel, makes and breaks the flow of power from the engine to the transmission there are two types of pressure plates, the coil spring-type and the diaphragmtype, the latter is used most often
  3. 3. Pressure Plate- diaphragm type    It consists of a pressed steel cover, a pressure plate with a machined flat surface, and the diaphragm spring The centre portion of the diaphragm spring is slit into numerous fingers that act as release levers The advantages of a diaphragm type pressure plate assembly are its compactness, lower weight, fewer moving parts, less effort to engage, reduces rotational imbalance by providing a balanced force around the pressure plate and less chances of clutch slippage
  4. 4. Pressure Plate- diaphragm type Assembly Exploded view
  5. 5. Pressure Plate- coil spring type      The pressure plate is backed by a number of coil springs and housed with them in a pressed-steel cover bolted to the flywheel The springs push against the cover The pressure of the clutch is applied to the disc using coil springs Uses levers to engage and disengage the clutch disc The coil spring design by nature will require more pedal effort to engage and disengage the clutch
  6. 6. Pressure Plate- coil spring type Assembly Exploded view
  7. 7. Clutch components- Clutch disc  Consists of a metal disc covered with a frictional facing  The lining is made of a woven or molded non-organic material that also contains particles of soft metal such as aluminum or brass  a series of radial grooves in the lining's face enhances the grip between the flywheel and the disc  A splined hub in the center of the disc mates with the transmission's input shaft  A group of torsional springs located dampens driveline shock and vibration .
  8. 8. Clutch components-Throw-out bearing    The throw-out bearing, or clutch release bearing is located between the clutch fork and the pressure plate fingers It only operates when the clutch pedal is depressed When the driver steps on the clutch pedal, the throw-out bearing applies force to the fingers of the spinning pressure plate to release the clutch When the clutch pedal is released, the bearing sits idle and does not contact the pressure plate fingers Clutch components
  9. 9. Clutch operation
  10. 10. Multi disc Clutch    Increase in torque capacity without increase in size Used in heavy vehicles where more torque is required Used in two wheelers where there is limited space

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