Patent ID: 7628725
Filing Date: 2009-12-08
Classification: F16H

Abstract:
1. A multi-speed transmission comprising: an input member; an output member; first, second, third and fourth planetary gear sets each having first, second and third members; said first member of said first planetary gear set being continuously connected with a stationary member; a first interconnecting member continuously connecting said third member of said first planetary gear set with said second member of said second planetary gear set, with said third member of said third planetary gear set and with said third member of said fourth planetary gear set; a second interconnecting member continuously connects said third member of said second planetary gear set with said second member of said third planetary gear set; and five torque-transmitting devices for selectively interconnecting said members of said planetary gear sets with said stationary member or with other members of said planetary gear sets, said five torque-transmitting devices being engaged in combinations of two to establish at least eight forward speed ratios and at least one reverse speed ratio between said input member and said output member.