Back to results
US 8,506,442 B2Granted
Multi-speed transmission
AssigneeGM Global Technology Operations LLC
InventorsEdward W. Mellet, James M. Hart, Andrew W. Phillips
Life of this patent
Estimating the term…
Abstract
A transmission is provided having an input member, an output member, at least four 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 actuatable in combinations of two to establish a plurality of forward gear ratios and one reverse gear ratio.
Claims20
A transmission comprising:
- an input member;
- an output member;
- first, second, third and fourth 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 the third member of the third planetary gear set;
- a third interconnecting member continuously interconnecting the third member of the first planetary gear set with the third member of the fourth planetary gear set;
- a fourth interconnecting member continuously interconnecting the third member of the second planetary gear set with the second member of the third planetary gear set;
- a fifth interconnecting member continuously interconnecting the first member of the fourth planetary gear set with a stationary member;
- and
- six 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 the stationary member, and
- wherein the six torque transmitting mechanisms are selectively engageable in combinations of at least two to establish a plurality of forward speed ratios and at least one reverse speed ratio between the input member and the output member.
8 more elements
A transmission comprising:
- an input member;
- an output member;
- first, second, third and fourth planetary gear sets each having first, second and third members, wherein the third member of the second planetary gear set rotatable supports a first and a second set of planet gears;
- 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 the third member of the third planetary gear set;
- a third interconnecting member continuously interconnecting the third member of the first planetary gear set with the third member of the fourth planetary gear set;
- a fourth interconnecting member continuously interconnecting the third member of the second planetary gear set with the second member of the third planetary gear set;
- a fifth interconnecting member continuously interconnecting the first member of the fourth planetary gear set with a stationary member;
- and
- six 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 the stationary member, and
- wherein the six torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least ten 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.