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5.1 Primary Inertia (mass)
Primary Flywheel
The primary flywheel is bolted to the engine
crankshaft. It is a steel stamped component with a
sufficient mass moment of inertia. In certain cases,
it could be made of cast iron. The ring gear is press
fitted on the flywheel to interface with the engine
starter.
The primary flywheel is bolted directly to the
crankshaft and contains the damping springs. The
secondary flywheel is fitted with a conventional
clutch cover and solid disc with a lower inertia,
improving the gear shifting.
There are two long curved springs between the
flywheels that absorb the engine vibrations. The
main advantage is a greater angular damping which
allows the maximum filtration.
A cover plate is welded to the primary flywheel
to form a chamber filled with low-friction grease
to help the springs move freely. The secondary
flywheel is made of special cast iron that can resist
the high thermal loads of the clutch.
Engine
Gearbox
DUAL MASS FLYWHEEL
Primary flywheel
Secondary flywheel
Clutch kit