- A clutch connects and disconnects two rotating shafts, allowing a vehicle to start from rest, change gears smoothly, and stop while in gear. - It operates using friction between two surfaces - the clutch disc connects to the engine flywheel and the pressure plate connects to the transmission. Pressing the clutch pedal disengages the surfaces and allows them to spin independently. - The main parts are the flywheel, pressure plate, clutch disc, and pedal/fork. A single plate clutch has one disc while a multi-plate clutch stacks multiple alternating discs to increase torque capacity.

2. • ACLUTCH
is amechanical device that engages and disengages the power transmission,
especially from driving shaft to driven shaft.
• In the simplest application, clutches connect and disconnect two rotating shafts. In
these
devices, one shaft is typically attached to an engine or other power unit (driving
member) while the other shaft (the driven member) provides output for work.

3. PURPOSE
• Aclutch isdesigned with the following
requirements
– Allow the vehicle to come to astop while the transmission
remains ingear
– Allow the driver to smoothly take off from adead stop
– Allow the driver to smoothly changegears
– Must be able to transmit power and torque without slipping

4. PRINCIPLE OF CLUTCH
 It operates on the principle of FRICTION.
 When two surfaces are brought in contact and are
held against each other due to friction between
them, they can be used to transmit power.
 If one is rotated, then other also rotates. One
surface is connected to engine and other to the
transmission system ofautomobile.
 Thus,clutch is nothing but acombination of two
friction surfaces.

5. MAIN PARTS OF A CLUTCH
• It consistsof
o adriving member
o adriven member
o an operating member
• The driving member has a flywheel which is mounted on the engine crankshaft.
A disc is bolted to flywheel which is known aspressure plate or driving disc.
• The driven member is adisc called clutch plate. This plate can slide freely to and
fro on the clutch shaft.
• The operating member consists of a pedal or lever which can be pressed to
disengage the driving and driven plate.

7. TYPES OF CLUTCH
Clutc
h
Positiv
e
Clutch
Frictio
n
Clutch
Plate Or
Disc
Clutch
Single
plate
clutch
Multiplate
Clutch
Con
e
Clutc
h
Centrifug
al
Clutch

8. COMPONENTS OF A CLUTCH
Primary Components
o Flywheel
o Clutch Disc
o Pressure Plate
o Release Bearing
Secondary Components
o Pilot Bearing
o Release Bearing
o Fork Slave
o Cylinder

9. CLUTCH TERMS
•Clutch disengaged(Clutch pedal pressed)
Theclutch is disengagedwhen
– Starting theengine
– Shifting thegear
– Stopping thevehicle and
– Idling theengine
• Clutch engaged
– Clutch pedal isreleased

10. SINGLE PLATE CLUTCH
• It hasonlyoneclutchplatewhichismountedonthesplinesof the clutchshaft.
• Theflywheelismountedonthe enginecrankshaftandrotateswith it.
• Thepressureplateisbolted to the flywheelthroughclutch springs.It isfree
to slideontheclutchshaftwhenthe clutch pedalisoperated.

11. Components of SINGLE PLATE CLUTCH
(Bolted to flywheel – Applies the
spring force to clamp the friction
disk to the flywheel)
(Clutch fork pushes T/O bearing
to release rotating clutch)
(Bolted to crankshaft)
(Throw-out bearing allows to push
on rotating clutchfingers)
( Pilot Bearing in the centre of flywheel supports the end of the input shaft )
(Friction Disc splined to transmission to the input shaft)

12. WORKING : SINGLE PLATE CLUTCH

14. MULTI PLATE CLUTCH
• AMulti plate clutch consistsof anumberof clutch plate,insteadof onlyone
clutchplateasinthe caseof singleclutchplate.
• Theincreasednumber of friction surfacesobviously increasesthe capacityof
the clutch to transmit torque.
• Theplatesarealternately fitted tothe engineshaft andgearboxshaft.
• Eachof the alternate plate slidesin groovesonthe flywheel andthe other
slideson splineson the pressureplate.

15. Components of MULTI PLATE CLUTCH

16. WORKING : MULTIPLATE CLUTCH

17. WORKING : MULTI PLATE CLUTCH
 When the Clutch is ENGAGED:
o When the clutch pedal is not pressed, The thrust springs do not move due to which the stiffness
provided by these springs maintains the pressure over the pressure plate having friction lines on
its innersurface.
o Due to this pressure over the pressure surface the frictional contact between the friction linesof
pressure plate and the friction lines of multiple clutch plates is maintained due to which frictional
force is applied over the flywheel.
o Due to this frictional force the frictional contact between the multiple clutch plates and the
flywheel is maintained which in turn finally provides clutch engagement.
 When the Clutch is DISENGAGED:
o When the clutch pedal is pressed the fulcrum attached at its inner end rotates due which the inner
splined sleeve through which the pressure plate is attached moves outward which in turn applies
pressure over the thrust springs.
o Due to this force the thrust springs moves which in turn release pressure over the pressure plate and
finally the frictional force between pressure plate, clutch plate and the flywheel is removed.
o Due to this removal of the frictional force, frictional contact between the pressure plate, clutch
plate flywheel breaks and finally the disengagement of the clutch is obtained.

18. SINGLE
PLATE
• Consists of Single
Plate.
• Torque
Transmitting
Capacity is less.
• Heat Generation is
less.
• Coefficient of friction
is high.
MULTI
PLATE
• Consists of Multiple Plates
• Torque Transmitting
Capacity is more.
• Heat Generation is more.
• Coefficient of friction is low.

19. MADE BY :
Shruti Mandaokar
(17070123102)
Praneta Sharma
(17070123096)
Smit Shah (17070123090)
GUIDED BY :
Sir Shreesh V Dhavle
Department of
Mechanical
Engineering