| US 7,490,526 B2 | ||
| Dual clutch powershift transmission with transfer shaft | ||
| John R. Forsyth, Washington, Mich. (US) | ||
| Assigned to Magna Powertrain USA, Inc., Troy, Mich. (US) | ||
| Filed on Apr. 17, 2007, as Appl. No. 11/736,329. | ||
| Claims priority of provisional application 60/802454, filed on May 22, 2006. | ||
| Prior Publication US 2007/0266810 A1, Nov. 22, 2007 | ||
| Int. Cl. F16H 3/08 (2006.01) | ||
| U.S. Cl. 74—330 [74/331] | 40 Claims |
| 1. A dual-clutch transmission for use in a motor vehicle having an engine and a driveline, comprising:
a first input shaft selectively drivable by the engine;
a second input shaft selectively drivable by the engine;
a first engine clutch operable to establish a releasable drive connection between the engine and the first input shaft;
a second engine clutch operable to establish a releasable drive connection between the engine and the second input shaft;
an output shaft adapted for connection to the driveline;
a first constant-mesh gearset being driven by the first input shaft, the first gearset including a first gear fixed to one
of the first input shaft and the output shaft and a second gear rotatably supported on the other of the first input shaft
and the output shaft;
a second constant-mesh gearset being driven by the second input shaft;
a third constant-mesh gearset being selectively driven by the first gearset or the second gearset, wherein the third gearset
drives the output shaft;
a first shift clutch operable to releasably drivingly couple the first gearset and the third gearset; and
a second shift clutch operable to releasably drivingly couple the second gearset and the third gearset.
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