Dual clutch transmission
AssigneeZF Friedrichshafen AG
InventorWolfgang Rieger
Life of this patent
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Abstract
A dual-clutch transmission comprising clutches with input sides coupled to an input shaft and output sides respectively coupled to two transmission input shafts. Toothed idler gearwheels are mounted to rotate on countershafts while toothed fixed gearwheels are connected to the first and the second transmission input shafts and engage with the idler gearwheels. Coupling devices are provided for connecting the idler gearwheels to the countershaft, and drive output gearwheels are fixed to the countershafts and couple an output shaft, while a shifting element couples the input shafts such that eight forward gears and at least one reverse gear can be engaged. Four wheel planes are arranged in the transmission such that at least one winding gear can be engaged by the shifting element.
Claims20
A dual-clutch transmission comprising:
- first and second clutches (K1, K2) 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_K1, w_K2) arranged coaxially with one another;
- at least two countershafts (w_vorgelege1, w_vorgelege2) 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_K1, w_K2) 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_vorgelege1, w_vorgelege2) in a rotationally fixed manner;
- a respective drive output gearwheel (09, 10) being fixed to each of the first and the second countershafts (w_vorgelege1, w_vorgelege2) 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_K1, w_K2) such that at least eight shift-under-load forward gears (1, 2, 3, 4, 5, 6, 7, 8) and at least one reverse gear (R1, R2) 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).
Dependencies are inferred from the claim text.