Patent ID: 7670245
Filing Date: 2010-03-02
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; a first interconnecting member continuously connecting said third member of the first planetary gear set with the first member of the second planetary gear set, the third member of the third planetary gear set and the second member of the fourth planetary gear set; a second interconnecting member continuously connecting said second member of the first planetary gear set with the second member of the second planetary gear set; said first member of said first planetary gear set being continuously connected with a stationary member; 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.