DUAL MASS CLUTCH SYSTEM

摘要

A dual mass flywheel and clutch system (2) for minimizing torsional vibration levels during engine start-up and during low speed engine operation where the rotational moment of inertia of a clutch input assembly (29) is minimized to raise the torsional natural frequency of the dual mass clutch system above the engine firing frequency when the clutch is disengaged to reduce the level of torsional vibration during engine start-up. After engine start-up, the dual mass clutch system is engaged and the torsional natural frequency of the clutch system returns to a lower frequency due to the rotation of the clutch output assembly (37) thereby effectively reducing the torsional vibration levels in the vehicle driveline in a normal manner.