21 / 34
19
8.3 Flexible flywheel
The crankshaft bends under the force of the strong
combustions inside the engine cylinders. This
generates an axis wobbling on the flywheel, which
is bolted to the end of the crankshaft. Stress occurs
between the bearings and the crankshaft, generating
vibrations. If not filtered, the result is a roaring noise
caused by the engine, a flywheel axial vibration and
a potential increased vibration on the clutch pedal.
System without flexible flywheel
Flexible flywheel, view from the crankshaft side
System with flexible flywheel
Flexible flywheel, view from the clutch side
The flexible flywheel filters the axial vibrations
transmitted through the engine crankshaft. This is
achieved by adding a flexible plate at the engine
side of the flywheel mass. Deformation of the
crankshaft continues, but is not transmitted to the
flywheel thanks to the flexible plate.
l
Reduced engine noise at high engine speeds
l
Reduced bending stress on crankshaft
l
Reduced level of vibration on the clutch pedal