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US 6,663,528 B1Granted
Dual clutch planetary manual transmission with switched output
AssigneeGeneral Motors Corporation
InventorRaymond James Haka
Life of this patent
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Abstract
A power transmission has two selectively engageable input clutches, four selectively manipulatable synchronizer clutches, and a planetary gearset. The input clutches and the synchronizer clutches are manipulated to establish at least seven forward power paths and a reverse power path between an input shaft and an output shaft. Interchanges between adjacent speed ratios are controlled by preselecting the synchronizer condition and then interchanging the selectively engageable input clutches.
Claims6
A power transmission comprising;
- an input shaft;
- an output shaft;
- a first selectively engageable input clutch;
- a second selectively engageable input clutch;
- a planetary gear arrangement comprising:
- at least six rotatable planetary members;
- a first synchronizer clutch selectively engaging said first selectively engageable input clutch with each of a first and second of said rotatable planetary members individually
- a second synchronizer clutch selectively engaging said second selectively engageable clutch with each of a third and a fourth of said rotatable planetary members individually
- a third synchronizer clutch selectively connecting said output shaft with each of said fourth and a fifth of said rotatable planetary members individually
- a fourth synchronizer clutch selectively connecting a ground member with each of said second and a sixth of said rotatably planetary members individually and
- said first and second selectively engageable input clutches and said four synchronizer clutches being engaged in a plurality of combinations to establish seven forward speed ratios and one reverse speed ratio between said input shaft and said output shaft.
8 more elements
Dependencies are inferred from the claim text.