Patent ID: 7287634

Claim:
A torque transmission device ( 1 , 101 , 201 , 301 , 401 , 501 , 601 ) in a drive train of a motor vehicle for the transmission of torque between an internal combustion engine having a crankshaft ( 4 ) and a twin-clutch transmission comprising at least two transmission input shafts ( 2 , 3 ) with two friction clutches ( 10 , 11 ) wherein: each transmission input shaft ( 2 , 3 ) is coupleable to the crankshaft ( 4 ) via a friction clutch ( 10 , 11 ); each friction clutch ( 10 , 11 ) is provided with friction units ( 10 a , 11 a ) on a driving end and on a driven end that may act on each other a via an axial pressure along a rotational axis ( 2 a ) of at least one of the transmission input shafts ( 2 , 3 ) to form a frictional engagement; the friction units ( 10 , 11 a ) are formed of a plurality of friction partners ( 12 a , 12 b , 13 a , 13 b ) that alternate as layers in the axial direction on a driving side and on a driven side; the friction units ( 10 a , 11 a ) of each friction clutch ( 10 , 11 ) are acted on against a stop ( 15 a , 15 b ) via an actuation part ( 14 a , 14 b ) assigned to each friction unit; mounted with the actuation part ( 14 a , 14 b ) of each friction clutch ( 10 , 11 ) is an actuation device ( 50 a , 50 b , 150 a ) that is rotationally fixedly joined to a stationary housing part ( 56 ), an actuation bearing ( 16 a , 16 b ) being interposed therein, and acts axially on each particular actuation part ( 14 a , 14 b ); both friction clutches ( 10 , 11 ) are operated in wet operating mode; the friction clutches ( 10 , 11 ) are radially concentrically disposed with respect to each other; input part ( 10 b ) of the outer friction clutch ( 10 ) is rotationally connected to input part ( 11 b ) of the inner friction clutch ( 11 ) and is arranged to transmit torque to the input part ( 11 b ); and, input part ( 11 b ) of the inner friction clutch ( 11 ) is radially centered via the rotational connection of parts ( 10 b ) and ( 11 b ).