Dual mass, DVA (dual mass vibration-damping flywheel), one mass integral with the crankshaft and the other on the gearbox mainshaft with an interposed flexible torsional damping system.The resonance points which, on the conventional system (rigid flywheel and dampened disc) are found at between 800 and 2200 rpm, have been moved to lower rotation speeds, outside of the operation range, thereby allowing improved damping of torsional vibrations and a reduction in noise.The clutch engagement mechanism, located between the dual flywheel and gearbox, consists of a rigid plate (unsprung) that improves gear manoeuvrability due to its reduced inertia.
1 - Crankshaft2 - Mass in one piece with the crankshaft3 - Mass in one piece with the gearbox main shaft4 - Flexible torsion damping system5 - Clutch plate6 - Thrust spring7 - Thrust bearing8 - Gearbox main shaft9 - Ring gear
