Patent ID: 7097584

Claim:
A dual clutch transmission ( 25 ) for a motor vehicle, the dual clutch transmission ( 25 ) comprising; a first transmission input shaft ( 20 ) to which a first gear stage is assigned and a second transmission input shaft ( 22 ) to which a second gear stage is assigned, wherein one of the first and the second transmission shafts is an outer hollow transmission input shaft ( 22 ) and the other of the first and the second transmission shafts is an inner transmission shaft ( 20 ) coaxial enclosed within the outer hollow transmission input shaft ( 22 ); a synchronization device ( 26 ) is located within the transmission for synchronization of rotational speeds of the first and the second gear stages upon shifting from one of the gear stages assigned to one transmission input shaft to another of the gear stages assigned to the other of the transmission input shafts during one of acceleration and deceleration; the synchronization device ( 26 ) including at least first and second planetary gear sets ( 30 , 40 ) and a braking facility ( 50 ), the first and the second planetary gear sets ( 30 , 40 ) are axially adjacent one another and are placed essentially coaxially to and in functional connection with the first and the second input shafts ( 20 , 22 ); and a first component ( 34 ; 42 ) of each of the first and the second planetary gear sets ( 30 , 40 ) is one of coupled with or couplable with the first transmission input shaft ( 20 ), a second component ( 32 ; 44 ) of each of the first and the second planetary gear sets ( 30 , 40 ) is one of coupled with and couplable with the second transmission input shaft ( 22 ), and a third component ( 36 ; 46 ) of each of the first and the second planetary gear sets ( 30 , 40 ) is couplable to a brake facility ( 50 ), supported by a transmission housing wall, by which the synchronization device can be braked.