TWO-MASS TYPE FLYWHEEL

摘要

PROBLEM TO BE SOLVED: To provide a two-mass flywheel type vibration damper mechanism disposed between an internal combustion engine and a power transmission device capable of achieving damping effect matched to different vibration and noise states based on different operation conditions, and reducing a device manufacturing cost. SOLUTION: A first flywheel mass comprises two thin metal plate molded parts, and the two thin metal plate molded parts form a spring receiving chamber. Viscous medium is filled in at least part of the chamber. The first flywheel mass further has a concentric circular additive mass protruded in an axial direction in an outer circumferential range of it. A second flywheel mass is protruded in an axial direction at least partly into the range of the circular additive mass.