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US 2006/0154777 A1Published application
Planetary manual transmission
AssigneeGeneral Motors Corporation
InventorsRaymond Haka, Madhusudan Raghavan
Life of this patent
Estimating the term…
Abstract
A powertrain has a power transmission including a pair of planetary gearsets. The planetary gearsets are selectively interconnectible with an input shaft through a plurality of synchronizer mechanisms to provide ten forward speed ratios and two reverse speed ratios.
Claims5
A power transmission comprising:
- a first planetary gearset having a first member, a second gear member, and a third member;
- a second planetary gearset having a first gear member, a second gear member, and a third member;
- an input shaft;
- an output shaft;
- a first synchronizer mechanism for selectively interconnecting a first member of both of said planetary gearsets with said input shaft and for interconnecting said input shaft with a second member of said second planetary gearset;
- a second synchronizer mechanism for selectively interconnecting a second member of said first planetary gearset with said input shaft and for selectively interconnecting a second member of said first planetary gearset with a stationary member of said transmission;
- a third synchronizer mechanism for selectively interconnecting a third member of said first planetary gearset with said second member of said second planetary gearset, and for selectively interconnecting said third member of said first planetary gearset with said stationary member;
- and
- means for interconnecting a third member of said second planetary gearset with said output shaft wherein said synchronizer mechanisms are selectively engageable to provide at least six forward speed ratios and a reverse speed ratio between said input shaft and said output shaft.
6 more elements
A power transmission comprising:
- and input shaft;
- an output shaft;
- a first planetary gear set having first, second, and third members, a second planetary gearset having first, second, and third members;
- a first torque-transmitting mechanism selectively interconnecting said input shaft with both said first member of said first planetary gearset and said first member of said second planetary gearset, or with said second member of said second planetary gearset;
- a second torque-transmitting mechanism selectively interconnecting said input shaft with said second member of said first planetary gearset, or with said third member of said first planetary gearset;
- a third torque-transmitting mechanism selectively interconnecting said second member of said first planetary gearset with a transmission housing, or selectively interconnecting said third member of said first planetary gearset with said transmission housing;
- a fourth torque-transmitting mechanism selectively interconnecting said third member of said first planetary gearset with said third member of said second planetary gearset or with said second member of said second planetary gearset;
- a fifth torque-transmitting mechanism selectively interconnecting said output shaft with said third member of said second planetary gearset or with said second member of said second planetary gearset;
- and
- said five torque-transmitting mechanisms being engaged in combinations of two to establish at least six forward speed ratios and one reverse speed ratio through said planetary gearsets between said input shaft and said output shaft.
7 more elements
Dependencies are inferred from the claim text.