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US 2007/0179009 A1Published application
Multi speed transmission
AssigneeGM Global Technology Operations LLC
InventorsMatthieu Rihn, Herve Schreiber
Life of this patent
Estimating the term…
Abstract
A transmission is provided having a planetary gearset having respective first, second, and third members, and a compound gearset having respective first, second, third, fourth, and fifth members. The transmission also includes a plurality of selectively engageable torque transmitting devices configured to selectively interconnect selected members of the planetary gearset and the compound gearset for unitary rotation thereby to provide a plurality of forward speed ratios and at least one reverse speed ratio between an input member and an output member.
Claims9
A transmission comprising:
- an input member;
- an output member;
- a stationary member;
- a planetary gearset having respective first, second, and third members;
- a compound gearset having respective first, second, third, fourth, and fifth members;
- said first member of said planetary gearset being continuously operatively connected to said input member for unitary rotation therewith;
- said first member of said compound gearset being continously operatively connected to said output member for unitary rotation therewith;
- first, second, third, fourth, fifth, sixth, and seventh torque transmitting devices being operative to selectively connect members of said planetary gearset and said compound gearset with said stationary member or with other members of said planetary gearset or said compound gearset to provide at least seven forward speed ratios.
5 more elements
A transmission comprising:
- an input member;
- an output member;
- a stationary member;
- a planetary gearset including a first sun gear member, a first ring gear member, and a first planet carrier member;
- a compound gearset including a second sun gear member, a third sun gear member, a second ring gear member, a third ring gear member;
- a second planet carrier member, a first planetary pinion member rotatably connected with respect to the second planet carrier member and meshingly engaged with said second sun gear member and said second ring gear member, and a second planetary pinion member rotatably connected with respect to the second planet carrier member and meshingly engaged with said third sun gear member, said first planetary pinion member, and said third ring gear member;
- said first sun gear member being continuously operatively connected to said input member;
- said third ring gear member being continuously operatively connected to said output member;
- and
- first, second, third, fourth, fifth, sixth, and seventh torque transmitting devices being operative to selectively connect members of said planetary gearset and said compound gearset with said stationary member or with other members of said planetary gearset or said compound gearset to provide at least seven forward speed ratios.
7 more elements
A transmission comprising:
- an input member;
- an output member;
- a stationary member;
- a planetary gearset including a first sun gear member, a first ring gear member, and a first planet carrier member;
- a compound gearset including a second sun gear member, a third sun gear member, a second ring gear member, a third ring gear member;
- a second planet carrier member, a first planetary pinion member rotatably connected with respect to the second planet carrier member and meshingly engaged with said second sun gear member and said second ring gear member, and a second planetary pinion member rotatably connected with respect to the second planet carrier member and meshingly engaged with said third sun gear member, said first planetary pinion member, and said third ring gear member;
- said first sun gear member being continuously operatively connected to said input member;
- said third ring gear member being continuously operatively connected to said output member;
- a first torque transmitting device being configured to selectively couple said first ring gear member with said stationary member;
- a second torque transmitting device being configured to selectively couple said first planet carrier member with said stationary member;
- a third torque transmitting device being configured to selectively couple said first planet carrier member and said second sun gear member for unitary rotation;
- a fourth torque transmitting device being configured to selectively couple said first ring gear member and said second ring gear member for unitary rotation;
- a fifth torque transmitting device being configured to selectively couple said first planet carrier member and said third sun gear member for unitary rotation;
- a sixth torque transmitting device being configured to selectively couple said input member and said first sun gear member with said third sun gear member for unitary rotation;
- and a seventh torque transmitting device being configured to selectively couple said input member and said first sun gear member with said second planet carrier member for unitary rotation.
12 more elements
Dependencies are inferred from the claim text.