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US 8,511,189 B2Granted
Dual clutch multi-speed transmission
AssigneeGM Global Technology Operations LLC
InventorsCraig S. Ross, Malcolm Kirkwood
Life of this patent
Estimating the term…
Abstract
A transmission includes an input member, an output transfer gear, first and second interconnecting members, a layshaft, a reverse member, a plurality of co-planar gear sets, and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and a plurality of forward speed ratios between the input member and the output transfer gear.
Claims20
A transmission comprising:
- an input shaft;
- an output;
- a first intermediate shaft;
- a second intermediate shaft concentric with the first intermediate shaft;
- a dual clutch assembly selectively engageable to couple the input shaft with one of the first and second intermediate shafts;
- a countershaft;
- an idler shaft;
- a first selectable set of gears selectively connectable for common rotation with the first intermediate shaft and intermeshing with a first set of gears connected for common rotation with the countershaft to form a first plurality of co-planar gear sets;
- a second selectable set of gears selectively connectable for common rotation with the second intermediate shaft and intermeshing with a second set of gears connected for common rotation with the countershaft to form a second plurality of co-planar gear sets;
- a first gear connected for common rotation with the second intermediate shaft and intermeshing with a first selectable gear selectively connectable for common rotation with the countershaft to form a first co-planar gear set;
- a second gear connected for common rotation with the second intermediate shaft and intermeshing with a second selectable gear selectively connectable for common rotation with the idler shaft to form a second co-planar gear set;
- a third gear connected for common rotation with the idler shaft and intermeshing with a fourth gear connected for common rotation with the countershaft for transferring torque from the idler shaft to the countershaft;
- and
- a transfer gear connected to the countershaft for transferring torque from the countershaft to the output.
11 more elements
A transmission comprising:
- an input shaft;
- an output;
- a first intermediate shaft;
- a second intermediate shaft concentric with the first intermediate shaft;
- a dual clutch assembly selectively engageable to couple the input shaft with one of the first and second intermediate shafts;
- a countershaft;
- an idler shaft;
- a first co-planar gear set having a first gear connected for common rotation with the second intermediate shaft and intermeshing with a second gear selectively connectable for common rotation with the countershaft;
- a second co-planar gear set having a first gear selectively connectable for common rotation with the first intermediate shaft and intermeshing with a second gear connected for common rotation with the countershaft;
- a third co-planar gear set having a first gear selectively connectable for common rotation with the second intermediate shaft and intermeshing with a second gear connected for common rotation with the countershaft;
- a fourth co-planar gear set having a first gear selectively connectable for common rotation with the first intermediate shaft and intermeshing with a second gear connected for common rotation with the countershaft;
- a fifth co-planar gear set having a first gear selectively connectable for common rotation with the second intermediate shaft and intermeshing with a second gear connected for common rotation with the countershaft;
- a sixth co-planar gear set having a first gear connected for common rotation with the second intermediate shaft and intermeshing with a second gear selectively connectable for common rotation with the idler shaft;
- a first transfer gear connected for common rotation with the idler shaft and intermeshing with a second transfer gear connected for common rotation with the countershaft for transferring torque from the idler shaft to the countershaft;
- and
- a third transfer gear connected to the countershaft for transferring torque from the countershaft to the output, and
- wherein the transmission is operable to provide at least five forward gear ratios and one reverse gear ratio between the input shaft and the output.
14 more elements
Dependencies are inferred from the claim text.