The document discusses the clutch system and its functions. The clutch allows the engine to disengage from the transmission for shifting gears and stopping, and allows for smooth engagement between the engine and transmission. The location of the clutch depends on the type of drive - it is in the front for front-wheel drive vehicles and can be in the front, rear, or middle for rear-wheel drive vehicles. The clutch has four main functions: to disengage the engine from transmission, allow gear shifting, provide smooth engagement by slipping momentarily, and transmit power when fully engaged.

1. Clutch System

2. Clutch
Allow the engine to be
disengaged to the
transmission for shifting gears
and coming to stop.
Allow smooth engagement
of engine to transmission.

3. LOCATION OF A CLUTCH
Depending on the type of drive, the clutch changes
its location:
 Rear wheel drive
 Front engine
 Rear engine
 Mid engine
 Front wheel drive

4. FUNCTIONS OF THE CLUTCH
1. It can be disengaged (clutch pedal down). This allows
engine cranking and permits the engine to run freely
without delivering the power to the transmission.
2. While disengaged (clutch pedal down), it permits the driver
to shift the transmission into various gears. This allows the
driver to select the proper gear for the operating condition.
3. While engaging (clutch pedal moving up), the clutch slip
momentarily. This provide smooth engagement and lessen
the shock on gears, shafts and other drive train parts.
4. When engaged (clutch pedal up), the clutch transmit
power from the engine to the transmission. All slipping has
stop.

5. OPERATION OF CLUTCH
DISENGAGED
 When the engine is running, the flywheel is rotating.
The pressure plate is attached to the flywheel so the
pressure plate also rotates. This friction disc is
located between the two.
 When the clutch pedal is released, the driver has
push down on the clutch pedal. This action forces
the friction disc to move away to the pressure
plate. No power transmitted to the clutch.

6. ENGAGED
 When the driver releases the clutch pedal, power
can flow through the clutch. Spring in the clutches
forces the pressure plate against the friction disc.
This action clamps the friction disc against tightly
between the flywheel and the pressure plate.
 Now the pressure plate and the friction disc rotate
with the flywheel. The friction disc assembled on a
splined shaft that carries the rotary motion to the
transmission.

7. PURPOSE OF CLUTCH
1. When the transfer if power is to be cut, the clutch must
instantaneously and completely disconnect the engine
from the transmission.
2. When the transfer of power is to be started the clutch must
exhibit a certain degrees of sliding so that the engine and
transmission can be engaged gradually.
3. When the engine and the transmission have been securely
connected the clutch must transfer power without any lost
of strip.

16. Types of Clutches