Patent ID: 7354376
Filing Date: 2008-04-08
Classification: F16H

Abstract:
1. A transmission comprising: an input member; an output member; a stationary member; a planetary gearset having respective first, second, and third members; a compound gearset having respective first, second, third, and fourth members; said first member of said planetary gearset being continuously operatively connected to said input member for unitary rotation therewith; said second member of said planetary gearset being continuously grounded to said stationary member; said first member of said compound gearset being continuously operatively connected to said output member for unitary rotation therewith; first, second, third, fourth, fifth, and sixth torque transmitting devices being operative to selectively connect members of said planetary gearset and said compound gearset with said stationary member or with other members of said planetary gearset or said compound gearset to provide at least eight forward speed ratios; wherein said first torque transmitting device is configured to selectively couple said third member of said planetary gearset with said second member of said compound gearset for unitary rotation; wherein said second torque transmitting device is configured to selectively couple said third member of said compound gearset with said stationary member; wherein said third torque transmitting device is configured to selectively couple said fourth member of said compound gearset with said stationary member; wherein said fourth torque transmitting device is configured to selectively couple said third member of said planetary gearset and said fourth member of said compound gearset for unitary rotation; wherein said fifth torque transmitting device is configured to selectively couple said first member of said planetary gearset and said fourth member of said compound gearset for unitary rotation; and wherein said sixth torque transmitting device is configured to selectively couple said input member and said first member of said planetary gearset with said third member of said compound gearset for unitary rotation.