Patent ID: 8038565
Filing Date: 2011-10-18
Classification: F16H

Abstract:
1. 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 input member is continuously interconnected to the third member of the fourth planetary gear set and wherein the output member is continuously interconnected to the third member of the third planetary gear set and the second member of the fourth planetary gear set; a first interconnecting member continuously interconnecting the first member of the first planetary gear set and the first member of the second planetary gear set with the second member of the third planetary gear set; a second interconnecting member continuously interconnecting the second member of the first planetary gear set with the third member of the second planetary gear set; six torque transmitting mechanisms, each selectively engageable to interconnect at least one of the first, second, and third members with at least another of the first, second, third members and a stationary member, and wherein the torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member, and wherein a plane is disposed perpendicular to an input member axis and between an end of the input member and the four planetary gear sets, and wherein the first planetary gear set is adjacent the imaginary plane and the third planetary gear set is remote from the imaginary plane, the second planetary gear set is adjacent the first planetary gear set and the fourth planetary gear set is disposed between the second planetary gear set and third planetary gear set.