Patent ID: 8166842

Claim:
A dual-clutch transmission comprising: first and second clutches (K 1 , K 2 ) having input sides connected to a drive input shaft (w_an) and output sides that are respectively connected to one of first and second transmission input shafts (w_K 1 , w_K 2 ) arranged coaxially with one another; at least two countershafts (w_vorgelege 1 , w_vorgelege 2 ) rotatably supporting toothed idler gearwheels ( 01 , 02 , 03 , 04 , 05 , 06 , 07 , 08 ); toothed fixed gearwheels ( 12 , 13 , 14 , 15 ) being connected in a rotationally fixed manner to one of the first and the second transmission input shafts (w_K 1 , w_K 2 ) and engaging at least some of the idler gearwheels ( 01 , 02 , 03 , 04 , 05 , 06 , 07 , 08 ); a plurality of coupling devices (A-B, C-D, E-F, G-H), each coupling at least one of the idler gearwheels ( 01 , 02 , 03 , 04 , 05 , 06 , 07 , 08 ) to one of the first and the second countershafts (w_vorgelege 1 , w_vorgelege 2 ) in a rotationally fixed manner; a respective drive output gearwheel ( 09 , 10 ) being fixed to each of the first and the second countershafts (w_vorgelege 1 , w_vorgelege 2 ) and coupled with a drive output shaft (w_ab); at least one shifting element (I) for engaging the first and the second transmission input shafts (w_K 1 , w_K 2 ) such that at least eight shift-under-load forward gears ( 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ) and at least one reverse gear (R 1 , R 2 ) are engagable; and four gearwheel planes ( 01 - 05 , 02 - 06 , 03 - 07 , 04 - 08 ) being arranged such that at least one shift-under-load winding gear is engagable with the shifting element (I).