Patent ID: 8365625

Claim:
A double clutch transmission comprising: first and second clutches (K 1 , K 2 ) each comprising an input side connected to a drive shaft (w_an) and an output side connected to a respective one of a first and a second transmission input shaft (w_k 1 , w_k 2 ) coaxially arranged with respect to one another; at least first and second countershafts (w_v 1 , w_v 2 ) supporting toothed idler gearwheels ( 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ); toothed fixed gearwheels ( 1 , 2 , 3 , 4 , 5 , 6 ) being supported on the first and the second transmission input shafts (w_k 1 , w_k 2 ) in a rotationally fixed manner, the fixed gearwheels ( 1 , 2 , 3 , 4 , 5 , 6 ) engaging with at least one of the idler gearwheels ( 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ); a plurality of coupling devices (A, B, C, D, E, F, G, H, I, J, K, L) for connecting an idler gearwheel ( 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ) to one of the first and the second countershafts (w_v 1 , w_v 2 ) in a rotationally fixed manner; one output gear ( 20 , 21 ) being provided on each of the first and the second countershafts (w_v 1 , w_v 2 ), and each of the output gears ( 20 , 21 ) being coupled to gearing of an output shaft (w_ab); a first at least one shift element (M) for connecting two of the toothed idler gearwheels in a rotationally fixed manner so that a plurality of power shifting forward gears ( 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ) and at least one reverse gear (R 1 , R 2 , R 3 , R 4 ) can be shifted; five gear planes being provided and comprise at least four dual gear planes ( 7 - 13 , 8 - 14 , 9 - 15 , 10 - 16 , 11 - 17 , 12 - 18 ), and for each dual gear plane ( 7 - 13 , 8 - 14 , 9 - 15 , 10 - 16 , 11 - 17 , 12 - 18 ) an idler gearwheel ( 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ) of each of the first and the second countershafts (w_v 1 , w_v 2 ) is associated with a fixed gearwheel ( 1 , 2 , 3 , 4 , 5 , 6 ) of one of the first and the second transmission input shafts (w_k 1 , w_k 2 ); at least one idler gearwheel ( 8 , 9 , 10 , 11 , 14 , 15 , 16 , 17 , 18 ), in each of the dual gear planes ( 7 - 13 , 8 - 14 , 9 - 15 , 10 - 16 , 11 - 17 , 12 - 18 ), is utilized for at least two gears such that a first at least one power shifting winding path gear is shiftable via the first at least one shift element (M or N).