Patent ID: 7651434
Filing Date: 2010-01-26
Classification: F16H

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