Abstract: The hydrodynamic coupling comprises a pump wheel and a turbine wheel arranged rotatably coaxially in relation to the pump wheel in a hydrodynamic fluid cycle. With the pump wheel a housing (4) is connected fast in rotation, through which an internal combustion engine drives the pump wheel. A controllable bridge-over clutch having a torsional vibration damper (1) is connected into the torque transmission path between the housing and a drive-output shaft coupled with the turbine wheel. The torsional vibration damper (1) comprises two damper units (2, 6, 10 and 3, 7, 11, 12) connected in series with one another into the torque transmission path.

Abstract: The clutch disc for a motor-vehicle friction clutch has a hub which defines an axis of rotation and from which there projects substantially radially a hub disc so as to be secured against rotation. On the hub there is mounted, so as to be rotatable through a limited angle of rotation, a friction lining carrier which comprises two side parts which are arranged on axially opposite sides of the hub disc and which are non-rotatably connected to each other and to the carrier. In the rotational path between the side parts and the hub disc there are arranged springs which are subjected to pressure during the relative movement of the friction lining carrier and the hub. Axially on both sides of the hub disc friction rings are arranged between the hub disc and the adjacent side parts. Between one of the two friction rings and the adjacent side part there is provided a pressure ring from which there project substantially radially several arms which are stiff in the circumferential direction of the pressure ring.

Abstract: The clutch disc for a motor vehicle friction clutch comprises a hub with side discs arranged axially on both sides of its hub flange and connected with friction linings into one unit. The side discs are rotatable in relation to the hub disc by the stressing of springs. An under-load friction damper comprises two control discs arranged axially on both sides of the hub disc, one of which comprises axial tabs which pass through openings of the hub disc. The other control disc is guided non-rotatably but axially displaceably on the tabs. Friction rings are arranged axially between the side discs on the one part and the control discs on the other. The friction force is generated by a dished spring which is clamped axially resiliently in between the axial tabs of the one control disc and the axially movable other control disc utilized as pressure disc. An idling friction damper is accommodated between the side discs protected radially within the zone radially defined by the tabs.

Abstract: The clutch disc for a motor vehicle friction clutch includes a hub (3) having a radially protruding hub flange (7), and two side plates (9, 11) rigidly connected together and limitedly rotatably mounted on the hub (3) on axially opposite sides of the hub flange (7). Compression springs of a torsion spring damper are arranged in windows of the hub flange (7) and of the side plates (9, 11). An idling operation friction damper (51, 59) and a load operation friction damper (99, 103, 105, 107) are arranged between the two side plates (9, 11). A control element (29) renders the two friction dampers effective in alternation. The control element (29) comprises two ring parts (31, 33) connected to rotate with one another. A friction ring (51) and a presser spring (59) of the idling friction damper are accommodated between the two ring parts (31, 33).