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US 2011/0034288 A1Published application
Multi-speed transmission having three planetary gear sets
AssigneeGM Global Technology Operations LLC
InventorsAndrew W. Phillips, Scott H. Wittkopp, James M. Hart, Clinton E. Carey
Life of this patent
Estimating the term…
Abstract
A transmission is provided having an input member, an output member, three planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes.
Claims18
A transmission comprising:
- an input member;
- an output member;
- first, second and third planetary gear sets each having first, second and third members;
- a first interconnecting member continuously interconnecting the first member of the first planetary gear set with the second member of the second planetary gear set;
- a second interconnecting member continuously interconnecting the second member of the first planetary gear set with a stationary member;
- a third interconnecting member continuously interconnecting the first member of the second planetary gear set with the second member of the third planetary gear set;
- and
- four torque transmitting mechanisms each selectively engageable to interconnect at least one of the first, second, and third members with at least one other of the first, second, third members and a stationary member, and
- wherein the torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least five forward speed ratios and at least one reverse speed ratio between the input member and the output member.
6 more elements
A transmission comprising:
- an input member;
- an output member;
- first, second and third planetary gear sets each having first, second and third members;
- a first interconnecting member continuously interconnecting the second member of the first planetary gear set with the third member of the second planetary gear set;
- a second interconnecting member continuously interconnecting the first member of the second planetary gear set and the second member of the third planetary gear set with the output member;
- and
- four torque transmitting mechanisms each selectively engageable to interconnect at least one of the first, second, and third members with at least one other of the first, second, third members and a stationary member, and
- wherein the torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least five forward speed ratios and at least one reverse speed ratio between the input member and the output member.
5 more elements
A transmission comprising:
- first, second and third planetary gear sets each having a sun gear, a carrier member and a ring gear;
- an input member continuously connected for common rotation with the ring gear of the third planetary gear set;
- an output member continuously connected for common rotation with the ring gear of the first planetary gear set and to carrier member of the second planetary gear set;
- a first interconnecting member continuously interconnecting the ring gear member of the first planetary gear set with the carrier member of the second planetary gear set;
- a second interconnecting member continuously interconnecting the carrier member of the first planetary gear set with a stationary member;
- a third interconnecting member continuously interconnecting the ring gear of the second planetary gear set with the carrier member of the third planetary gear set;
- a first torque transmitting mechanism selectively engageable to interconnect the ring gear of the third planetary gear set and the input member with the sun gear member of the third planetary gear set;
- a second torque transmitting mechanism selectively engageable to interconnect the sun gear of the second planetary gear set with the sun gear of the third planetary gear set;
- a third torque transmitting mechanisms is selectively engageable to interconnect the sun gear of the first planetary gear set with the sun gear of the third planetary gear set;
- and
- a fourth torque transmitting mechanisms is selectively engageable to interconnect the sun gear of the second planetary gear set with the carrier member of the first planetary gear set and the stationary member, and
- wherein the torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least five forward speed ratios and at least one reverse speed ratio between the input member and the output member.
9 more elements
A transmission comprising:
- first, second and third planetary gear sets each having a sun gear, a carrier member and a ring gear;
- an input member continuously connected for common rotation with the ring gear of the third planetary gear set;
- an output member continuously connected for common rotation with the ring gear member of the second planetary gear set and to carrier member of the third planetary gear set;
- a first interconnecting member continuously interconnecting the carrier member of the first planetary gear set with the sun gear member of the second planetary gear set;
- a second interconnecting member continuously interconnecting the ring gear of the second planetary gear set and the carrier member of the third planetary gear set with the output member;
- a first torque transmitting mechanism selectively engageable to interconnect the sun gear of the first planetary gear set with the ring gear of the third planetary gear set and the input member;
- a second torque transmitting mechanism selectively engageable to interconnect the carrier member of the first planetary gear set and the sun gear of the second planetary gear set with the sun gear of the third planetary gear set;
- a third torque transmitting mechanism selectively engageable to interconnect the sun gear of the first planetary gear set with the sun gear member of the third planetary gear set;
- and
- a fourth torque transmitting mechanism selectively engageable to interconnect the carrier member of the second planetary gear set with a stationary member,
- wherein the torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least five forward speed ratios and at least one reverse speed ratio between the input member and the output member.
8 more elements
Dependencies are inferred from the claim text.