Plate Type Clutches consists
of set of friction plates & steel
plates that are pressed under the spring
load & transmits the power from engine
to gearbox and subsequently to drive wheels.
This clutch is an arrangement of plates
stacked in alternating fashion, one geared
on the inside to the engine, and next
geared on the outside to the transmission
input shaft. Whether wet or dry, the plates
are squeezed together by a spring, causing
friction buildup between the plates until
they rotate as a single unit, driving
the transmission directly. Know
Two Wheeler Clutches
Centrifugal Clutch is
based on the principle of centrifugal
force. This clutch uses a combination
of friction Discs (like brake shoe) and
floater (outer) to transfer power from
the engine to the drive wheels. In all
centrifugal clutches, centrifugal force
works against spring tension to determine
whether the clutch is engaged or not.
At low rpm, the spring tension is greater
than the centrifugal force and the clutch
spins freely. As the engine speed increases,
the centrifugal force begins to overcome
the spring tension and at one point of
time friction discs get engaged with floater
and transmit the power.
Manual Transmission are characterized
by gear ratios which are selectable by
engaging pairs of gears inside the transmission.
Manual Transmission is a type of transmission
used in automotive applications. Manual
Transmissions often feature a driver-operated
clutch and a movable gear selector, although
some do not. Most automobile manual transmissions
allow the driver to select any gear at
any time, but some, such as those commonly
mounted on motorcycles and some types
of race cars, only allow the driver to
select the next- highest or lower gear
Transmission Four Wheeler Clutches
Transmission also accomplish
the same thing as Manual Transmission
But it does in different way. The
automatic transmission’s primary
job is to allow the engine to operate
in its narrow range of speeds while
providing a wide range of output speeds.
In place of clutch, Auto Transmission
uses a torque converter & same
set of gear produces all of the different
gear ratios to obtain varying speed
of vehicle.There are two big difference
between an automatic transmission
and manual transmission:
There is no clutch pedal in an
automatic transmission car.
no gear shift in an automatic
transmission car. Once you put
the transmission into drive, everything
else is automatic.
The clutch friction Disc,
also called as friction lining, consists
of a splined round metal plate covered with
friction material (lining). The splines
in the center of the clutch Disc mesh with
the splines on the input shaft of the manual
transmission. This makes the input shaft
and Disc turn together. However, the Disc
is free to slide back and forth on the shaft.
Base & Paper Base Clutch Friction Disc
cork base clutch friction
Disc is made of heat–resistant non-asbestos
cork, cotton fibers and copper wires moulded
together. Grooves are cut into the friction
material to aid cooling and release of the
clutch Disc. In some cases, rivets are used
to bond the friction material to both sides
of the metal body of the Disc.
The paper base clutch friction
Disc is made of heat–resistant cellulose,
cotton fibers and copper wires moulded together.
Cellulose is used to prolong life of the
clutch and provide more torsional strength.
Paper CFD has more life than cork base friction
material as it possess :-