Liberty Sport 2WD L4-2.4L VIN 1 (2002)
Flywheel: Description and Operation
DUAL MASS FLYWHEEL
Dual Mass Flywheel
DESCRIPTION
The Dual Mass Flywheel is used on the 2.4 1 engine (Fig. 4). The flywheel incorporates the ring gear around the outer circumference to mesh with the
starter to permit engine cranking. The primary flywheel side is bolted to the crankshaft. The secondary flywheel face serves as the driving member to
the clutch disc. Internal springs between the flywheels are use to dampen energy.
OPERATION
The flywheel serves to dampen the engine firing pulses. The heavy weight of the flywheel relative to the rotating mass of the engine components
serves to stabilize the flow of power to the remainder of the drivetrain. The crankshaft has the tendency to attempt to speed up and slow down in
response to the cylinder firing pulses.
The flywheel dampens these impulses by absorbing energy when the crankshaft speeds and releasing the energy back into the system when the
crankshaft slows down.
On a Dual Mass Flywheel the additional secondary mass coupled to the transmission lowers the natural frequency of the transmission rotating
elements. This decreases the transmission gear rattle. The damper springs between the two flywheel masses replace the clutch disc damper springs and
assist in a smooth transfer of torque to the transmission.
CAUTION:
The Dual Mass Flywheel is serviced as an assembly only and should never be taken apart.
