Patent ID: 6743140
Filing Date: 2004-06-01
Classification: F16H

Abstract:
A multi-speed transmission comprising:an input shaft; an output shaft; 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 interconnecting said first member of said second planetary gear set with said first member of said third planetary gear set and with said output shaft; said first member of said fourth planetary gear set being continuously connected with said stationary member; a first input clutch selectively interconnecting said input shaft with said second or third member of said first or second planetary gear set; a second input clutch selectively interconnecting said input shaft with said second member of said third planetary gear set; a first, second, third and fourth torque-transmitting mechanism selectively interconnecting members of said first and second planetary gear sets with other members of said first and second planetary gear set; and a fifth, sixth, seventh and eighth torque-transmitting mechanism selectively interconnecting members of said third and fourth planetary gear sets with other members of said third and fourth planetary gear sets; said input clutches and torque-transmitting mechanisms being engaged in combinations of at least two to provide at least six forward speed ratios and a reverse speed ratio.