Patent ID: 7448290

Claim:
A twin clutch transmission for a motor vehicle with a) at least seven forward gears which are shiftable under load and at least one reverse gear, comprising: b) two concentric intermediate shafts ( 14 , 15 ) which are arranged co-axially with a transmission axis (X-X) and which can be engaged selectively with an input shaft ( 11 ) via a twin clutch ( 13 ) including first and second clutches K 1 , K 2 , one of the intermediate shafts ( 15 ) being a hollow shaft connected to the first clutch K 1 and, the other ( 14 ) extending through the hollow shaft ( 15 ) and being connected to the second clutch (K 2 ), c) first and second countershafts ( 16 , 26 ) arranged parallel to the transmission axis (X-X), d) the input shaft ( 11 ) extending coaxially with the transmission axis (X-X), e) a transmission output shaft ( 12 ) extending coaxially with the transmission axis (X-X), f) the transmission including four interim transmission stages for establishing at least a lowest forward gear between the input shaft ( 11 ) and the output shaft ( 12 ) and g) for establishing at least a second lowest forward gear only two transmission stages being disposed between the input shaft ( 11 ) and the output shaft ( 12 ), and h) for at least the lowest forward gear and the second lowest forward gear the power being transmitted via at least one identical gear ( 28 , 38 ), the lowest forward gear in the power path between the transmission input shaft ( 11 ) and the transmission output shaft ( 12 ) including two interconnected gears ( 34 , 35 ) which are rotatable together about the transmission axis (X-X), in the lowest forward gear one ( 35 ) of the interconnected gears ( 34 , 35 ) receiving the drive torque from one counter shaft ( 16 ) and the other gear ( 34 ) transmitting the drive torque to the other countershaft ( 26 ), and in another forward gear at least one of the interconnected gears ( 34 , 35 ) transmitting the drive torque between a countershaft ( 16 , 26 ) and the transmission output shaft ( 12 ) which extends co-axially with the transmission axis (X-X).