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US 6,786,845 B1Granted
Multi-speed power transmission
AssigneeGeneral Motors Corporation
InventorRaymond J. Haka
Life of this patent
Estimating the term…
Abstract
A multi-speed planetary transmission having mechanical clutches and two simple planetary gearsets. The mechanical clutches are operated between the transmission input shaft and output shaft to control powerpaths through the planetary gearsets in a manner to establish ten forward speed ratios and one reverse speed ratio. One of said mechanical clutches being operable to selectively interconnect two members of one of the planetary gearsets to another of said mechanical clutches both independently and simultaneously.
Claims5
A multi-speed transmission comprising:
- an input shaft;
- an output shaft;
- a first simple planetary gearset includes ring gear means, a planet carrier assembly member;
- and a sun gear member;
- a second simple planetary gearset includes a ring gear member, a planet carrier assembly member, and sun gear means, said planet carrier assembly member being continuously connected with said output shaft;
- a first mechanical clutch means selectively interconnecting said input shaft with said ring gear means, said planet carrier assembly member, and sun gear member of said first planetary gearset;
- a second mechanical clutch means selectively independently interconnecting each of said ring gear means, said planet carrier assembly member, and said sun gear member of said first planetary gearset with a transmission housing;
- a third mechanical clutch means selectively connectible with said ring gear means and said planet carrier assembly member of said first planetary gearset;
- a fourth mechanical clutch means independently selectively connecting said third mechanical clutch with said ring gear member and said sun gear means of said second planetary gearset;
- a fifth mechanical clutch means independently selectively connecting said ring gear member and said sun gear means of said second planetary gearset with said housing;
- all five said mechanical clutches each having a neutral position;
- said first, third, and fourth mechanical clutch means being rotating type torque transmitting mechanisms, said second and fifth mechanical clutch means being stationary type torque transmitting mechanisms and
- said five mechanical clutch means being selectively positionable to establish interconnections through and between said first and second planetary gearsets, and said transmission housing to establish ten forward speed ratios and one reverse speed ratio between said input shaft and said output shaft.
10 more elements
Dependencies are inferred from the claim text.