Multi-speed transmission

摘要

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 at least nine forward gear ratios and one reverse gear ratio.

主权项

1. A transmission comprising:
an input member; an output member; first, second, third and fourth planetary gear sets each haying first second and third members; a first interconnecting member continuously interconnecting the third member of the first planetary gear set with the second member of the fourth 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 first member of the first planetary gear set with the third member of the second planetary gear set; a fourth interconnecting member continuously interconnecting the second 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 second planetary gear set with the third member of the fourth planetary gear set; 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 a stationary member, wherein the six torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member, wherein the input member is continuously connected for common rotation with the third member of the fourth planetary gear set and the first member of the second planetary gear set, wherein the output member is continuously connected for common rotation with the second member of the first planetary gear set and the third member of the third planetary gear set, and wherein the third member of the first planetary gear set, the third member of the fourth planetary gear set, the first member of the second planetary gear set, and the first member of the third planetary gear set are sun gears; wherein the second members of the first, second, third, and fourth planetary gear sets are carrier members; and wherein the first member of the first planetary gear set, the first member of the fourth planetary gear set, the third member of the second planetary gear set, and the third member of the third planetary gear set are ring gears.