A clutch connects and disconnects a driving shaft, such as an engine crankshaft, to a driven shaft that provides output power. A clutch uses friction between two surfaces to transmit torque from the driving shaft to the driven shaft. When the clutch pedal is pressed, springs in the pressure plate disengage the clutch plates from the flywheel, disconnecting the driven shaft. Releasing the pedal engages the clutch plates between the flywheel and pressure plate using the springs, connecting the driven shaft. A single plate clutch has one clutch plate that connects the flywheel to the driven shaft through friction to transfer power.

1. * A PRESENTATION ON :-
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3.  • A CLUTCH is a mechanical 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.
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5.  • A clutch is designed with the following
requirements –
 Allow the vehicle to come to a stop while the
transmission remains in gear
 Allow the driver to smoothly take off from a
dead stop
 Allow the driver to smoothly change gears
 Must be able to transmit power and torque
without slipping
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6.  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 of automobile.
 Thus, clutch is nothing but a combination of
two friction surfaces.
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7.  It consists of o a driving member , a driven
member & an operating member -
 Driving Member
 Driven Members
 Operating members
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8. •Driving members- The driving member has a
flywheel which is mounted on the engine crankshaft.
A disc is bolted to flywheel which is known as
pressure plate or driving disc.
Driven members- The driven member is a disc called
clutch plate. This plate can slide freely to and fro on
the clutch shaft. •
Operating members - The operating member consists
of a pedal or lever which can be pressed to disengage
the driving and driven plate.
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9.  Single Plate Clutch
 Multi Plate Clutch
 Cone Clutch
 Centrifugal Clutch
 Semi-centrifugal Clutch
 Dog & Spline Clutch
 Vaccuum Clutch
 Hydraulic Clutch
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10. Primary Components –
Flywheel
Clutch Disc
Pressure Plate
Release Bearing
Secondary Components -
Pilot Bearing
Release Bearing
Fork Slave
Cylinder
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11.  Single plate clutch has only one clutch plate
that is mounted on the splines cut off the
driving shaft and the Flywheel is mounted on
the engine crankshaft and rotates with it.
 The force of friction is employed to start out
the driven shaft from zero rpm and make it
gradually to the proper speed without
excessive slipping of the friction surfaces.
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12.  Engine Shaft
 Flywheel
 Friction Lining
 Clutch Spring
 Clutch Plate
 Pressure Plate
 Clutch Pedal and
 Bearings
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13. Engine Shaft:
An engine shaft is a rotating shaft that converts one form
of motion into another. It is directly attached to the
engine mechanism by which clutch parameters act on it.
One is the driving shaft that is attached to the engine,
the other one is the driven shaft that will run in
conjunction with the driving shaft via a gearbox.
Flywheel:
Flywheels store energy by using a rotating wheel in
which energy stored increases as the square of the
angular velocity and only linearly with the moment of
inertia. The high angular velocities attained can result in
the material disintegrating due to the forces involved.
During engagement and disengagement, it acts as a
source of energy whenever required
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14. Friction Lining:
Friction Lining is a friction disc that assists the clutch in
starting and stopping the energy continuation between a
driven shaft and a drive shaft.
Friction linings have a low coefficient of friction so they
create quiet, stable, and smooth operations.material of
friction lining is asbestos, fiberglass, silicon dioxide.
Thrust Spring:
Helical-coil thrust-springs inserted between the pressure
plate and the cover. When in the mode of compression,
It provides necessary torque so that it loads the
pressure-plate against the driven-plate when the clutch
is engaged. It is made up of high tensile steel and nickel
chrome steel.
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15. Clutch Plate:
One clutch plate is used in a single plate clutch. It is one
of the main components of clutches. The clutch plate is a
thin disc-type metallic plate that has both side friction
linings. The frictional surface will provide the necessary
torque to transmit.
Pressure Plate:
The pressure plate creates pressure on clutch plates to
maintain proper contact between the surfaces of
flywheel and clutch plate by means of spring which are
attached to it. The pressure plate is generally made up of
cast iron.
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16. Clutch Pedal:
It is the operating parameter of the clutch by which the
driver operates the clutch. The driver has to press the
pedal when the gear is to be applied. It is a set of the
mechanical linkage which assists in the engagement and
disengagement of the clutch.
Release Bearings:
The release bearing also called throw-out bearing.it is
located around the input shaft at the back of the pressure
plate. Release bearing decreases the friction between the
release fork and the clutch pressure plate lever so wear
out of the pressure plate will be less. The bearing should
be lubricated properly. Mechanical bearings and
hydraulic bearings are types of release bearings
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18.  The pressure plate is bolted to the Flywheel
with the help of clutch springs because of the
splines cut on the shaft. It is free to slide on the
clutch shaft when the clutch pedal is operated.
 A single plate friction clutch consisting of two
flanges. One flange is strongly fitted to the
driving shaft, while the other is free to move
along the driven shaft due to splined
connection.
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19. The action force is provided by a spring which makes
forces the driven flange to move towards the driving
flange. The face of the drive flange is attached with the
help of friction material such as cork, leather, and
asbestos.
The pressure plate backed by the release levers attached
against the compression spring, so that the friction
linings on the clutch plates are free from Flywheel and
pressure plate.
When the pressure plate is released the compression
springs are free to move the pressure plate to the left
side make it bring in contact with the clutch.
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20. The pressure plate will moves to the left sliding to the
clutch plate on the splined cut on the hub along the
driven shaft until the friction lining will touch the
Flywheel cone.
The compression springs now cause the linings to be
gripped between the pressure plate and the Flywheel
and the friction between the linings Flywheel and
pressure plate causes the clutch plate to revolve the
driven shaft.
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21.  less expensive.
 Requires less maintenance
 Gears will shift in an easy
way due to the control
movement as
 More reliable
 Slippage is quite less.
 very less power loss
 Heat generation is less
 Very fast engagement and
disengagement
 The greater force
required to disengage
because the springs
have to be stiffer.
 Torque transmitting
capacity is very less as
compared to the
multi-plate clutch.
 Large space is
required in single
plate clutch.
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22.  Torque Transmission
 Vibrations Damping
 Gradual Engaging
 Heat Dissipation
 Dynamic Balancing
 Free Pedal Play
 Size
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