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US 2014/0235400 A1Published application
Multi-speed transmission having three planetary gear sets
AssigneeGM Global Technology Operations LLC
InventorsJames M. Hart, James B. Borgerson
Life of this patent
Estimating the term…
Abstract
A transmission includes an input member, an output member, three planetary gear sets, a coupling member 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.
Claims31
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 first member of the second planetary gear set;
- a second interconnecting member continuously interconnecting the third member of the first planetary gear set with the second member of the second planetary gear set;
- a third interconnecting member continuously interconnecting the third member of the first planetary gear set with the first member of the third planetary gear set;
- and
- five torque transmitting mechanisms each selectively engageable to interconnect at least one of the first, second and third members of the first, second and third planetary gear sets 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 six 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;
- an interconnecting member interconnecting the third member of the first planetary gear set with the first member of the third planetary gear set;
- a first torque transmitting mechanism selectively engageable to interconnect the first member of the first planetary gear set with the second member of the third planetary gear set;
- a second torque transmitting mechanism selectively engageable to interconnect the first interconnecting member with the second member of the third planetary gear set;
- a third torque transmitting mechanism selectively engageable to interconnect at least one of the second interconnecting member and the third interconnecting member with a stationary member;
- a fourth torque transmitting mechanism selectively engageable to interconnect the third member of the second planetary gear set with the stationary member;
- a fifth torque transmitting mechanism selectively engageable to interconnect the second member of the third planetary gear set with the stationary member, and
- wherein the torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least six forward speed ratios and at least one reverse speed ratio between the input member and the output member.
7 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, wherein the input member is continuously interconnected to the first member of the first planetary gear set and the output member is continuously interconnected to the third member of the third planetary gear set;
- an interconnecting member interconnecting the third member of the first planetary gear set with the first member of the third planetary gear set;
- a first torque transmitting mechanism selectively engageable to interconnect the first member of the first planetary gear set with the second member of the third planetary gear set;
- a second torque transmitting mechanism selectively engageable to interconnect the first interconnecting member with the second member of the third planetary gear set;
- a third torque transmitting mechanism selectively engageable to interconnect at least one of the second interconnecting member and the third interconnecting member with the stationary member;
- a fourth torque transmitting mechanism selectively engageable to interconnect the third member of the second planetary gear set with the stationary member;
- a fifth torque transmitting mechanism selectively engageable to interconnect the second member of the third planetary gear set with the stationary member, and
- wherein the torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least six forward speed ratios and at least one reverse speed ratio between the input member and the output member.
7 more elements
Dependencies are inferred from the claim text.