Clutch is an essential part of a transmission system in automobile also through the clutch we can control our vehicles even when vehicles are running.

1. CLUTCH

2. WHY DO WE NEED CLUTCH?
• Because engine run all the time but wheel don’t
• To stop car without killing the engine
• Transfer the power from engine to wheel
• Gradual engagement without sudden jerks

3. CLUTCH

4. WHAT IS CLUTCH?
• Clutch is a part of Transmission system
• Clutch is a mechanism which enables the rotary motion of one shaft
to be transmitted when desired to a second shaft

5. LOCATION OF CLUTCH

6. WORKING PRINCIPLE OF CLUTCH

7. FUNCTION OF CLUTCH
• Torque transmission
• Gradual engagement
• Heat dissipation
• To absorb shock and vibration during power transmission
• Disengage engine from transmission
• Release engine from transmission during gear shifts

8. TYPES OF CLUTCH
• Friction Clutch
• Fluid flywheel/Hydraulic Clutch
• Electromagnetic Clutch

9. FRICTION CLUTCH
DRY FRICTION WET FRICTION

10. DRY FRICTION CLUTCH
• Cone clutch
• Single plate clutch
• Multiplate clutch
• Centrifugal clutch

11. CONE CLUTCH
• WORKING

12. ADVANTAGE
• Normal force acting on the contact surfaces is larger than the axial
force.

13. DISADVANTAGE
• If the angle of cone is made smaller than about 20 deg. The male
cone tends to bind or join the female cone and it becomes difficult to
disengage the clutch.
• A small amount of wear on the cone surface results in a considerable
amount of the axial movement of the male cone for which it will be
difficult to allow

14. SINGLE PLATE CLUTCH
• WORKING

15. ADVANTAGE
• With the single plate clutch gear changing is easier than the cone
clutch because the pedal movement is less in this case.
• It does not suffer from disadvantage of cone clutch i.e binding of
cones etc. and hence it is more reliable.

16. DISADVANTAGE
• As compared to cone clutch the spring have to more stiff and this
means grater force required to be applied by the driver while
disengaging.

17. MULTIPLATE CLUTCH
• WORKING

18. CENTRIFUGAL CLUTCH
• WORKING

19. MAIN PARTS OF CLUTCH
• Fly wheel
• Clutch plate
• Pressure plate
• Springs
• Throw-out bearing

20. Flywheel
• Flywheel connected with the engine crank
• Clutch cover bolted with the flywheel
• Clutch turn with the flywheel

21. Clutch plate
• material= steel
• Mounted on splined hub
• Friction facing material- asbestos
• And non asbestos

22. Pressure plate
• Material- high tensile gray iron
• The pressure plate should also have sufficient mass and thermal
conductivity

23. SPRING
• The stiffness of the clutch springs should be the maximum
• Spring material- steel
• Used to absorb shock and vibration during initial contact

24. THROW-OUT BEARING
• The clutch pedal is connected either mechanically or hydraulically to a
fork mechanism which loops around the throw-out bearing
• When the clutch pedal is pressed, the fork pushes on the throw-out
bearing and it slides along the layshaft putting pressure on the
innermost edges of the diaphragm springs
• This leads to disengage of clutch

25. EXPLODED VIEW OF CAR CLUTCH

26. CLUTCH PLATE LINING AND MATERIAL
• Clutch disc/plate- Steel
• Clutch lining- Asbestos and copper wire grit, ceramics
• Rivets- Aluminums-copper
• Springs- Steel
• Hub- Steel

27. ACCIDENTAL CASES OF CLUTCH
• Burning a Clutch
• Clutch Slipping

28. BURNING A CLUTCH
• When clutch is not totally engaged with the flywheel
• Resting a foot on the clutch pedal during normal drive

29. CLUTCH SLIPPING
• Diaphragm spring has weakened
• Wearing down the friction material on the clutch plate
• The clutch is not properly engaged with the flywheel
• Under heavy load accelerating in a high gear or up a hill
• Do this long result a burning a clutch

30. THANK YOU