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In the D.M.F. with inner springs, small straight springs
are integrated in the drive plate. Less sensitive to the
centrifugal load, they are able to filter the vibrations.
For some extremely demanding applications and
especially on Rear Wheel Drive (R.W.D.) vehicles,
it is necessary to obtain an extremely low level of
vibration at gearbox entry level.
Valeo Long Travel Damper (L.T.D.) technology,
developed for automatic transmission damping, is
integrated in the D.M.F. to reach this target.
4 000 rpm
2 000 rpm
Curved
spring
Curved
spring
8. Dual Mass Flywheel
technology evolutions
Effective area
Effective area