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US 2003/0228951 A1Published application
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 engageable between said first selectively engageable input clutch and a first and second of said rotatable planetary members;
- a second synchronizer clutch selectively engageable between said second selectively engageable clutch, and a third and a fourth of said rotatable planetary members;
- a third synchronizer clutch selectively connectible between said output shaft and said fourth and a fifth of said rotatable planetary members;
- a fourth synchronizer clutch selectively connectible between a ground member and said second and a sixth of said rotatably planetary members;
- 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.
9 more elements
Dependencies are inferred from the claim text.