Patent ID: 6648789
Filing Date: 2003-11-18
Classification: F16H

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