Torsional oscillation damper for internal combustion engine drive transmission has relatively rotatable primary and secondary elements with friction damping device between central part and central disc of secondary element

摘要

The oscillation damper (2) has a primary element (3) and a secondary element (4) which can rotate relative to one another on the peripheral direction, with a spring coupling between them. The secondary element has a central part (6) and a central disc (9.1,9.2), with limited relative rotation between them in the peripheral direction and a friction damping device (43.1,43.2) between the central part and the central disc.