Patent ID: 7231843

Claim:
A dual clutch transmission ( 11 ) with a dual clutch ( 1 ) in which an output side of a first clutch (K 1 ) is connected with a hollow first drive shaft ( 4 ) and an output side of a second clutch (K 2 ) is connected with a second drive shaft ( 3 ) coaxial arranged in the hollow first drive shaft ( 4 ), each of the first and second drive shafts ( 3 , 4 ) has a fixed gear ( 5 , 6 ), the transmission ( 11 ) has two countershafts ( 7 , 8 ) and a first of the two countershafts ( 8 ) is a hollow shaft within which a coaxial countershaft ( 7 ) is rotationally mounted, each of the two countershafts ( 7 , 8 ) has a fixed gear ( 9 , 10 ), and the fixed gear ( 6 ) of the hollow first drive shaft ( 4 ) meshes with the fixed gear ( 9 ) of the coaxial countershaft ( 7 ) and the fixed gear ( 5 ) of the coaxial second drive shaft ( 3 ) meshes with the fixed gear ( 10 ) of the hollow countershaft ( 8 ); wherein transmission output shaft ( 17 ) is coaxially aligned with the first and the second drive shafts ( 3 , 4 ), the two countershafts ( 7 , 8 ) each have one or more of idler and/or fixed gears which mesh with one of an idler or a fixed gear of the transmission output shaft ( 17 ), and each of the idler gears of the transmission ( 11 ) are rotationally fixed with at least one of the transmission output shaft ( 17 ) and the two countershafts ( 7 , 8 ) by one of a plurality of coupling devices (A-B; C-D; E-F; G-H), the two countershafts ( 7 , 8 ) are rotationally connectable with one another by a first coupling device (C-D), and an idler gear ( 13 ), of the hollow countershaft ( 8 ), meshes with a fixed gear ( 15 ) of the transmission output shaft ( 17 ).