Patent ID: 6514170
Filing Date: 2003-02-04
Classification: F16H

Abstract:
A family of transmissions wherein each family member comprises: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 one of said planetary gear sets, said output shaft being continuously interconnected with another member of one of said planetary gear sets; a first interconnecting member continuously interconnecting said first member of said first planetary gear set and said first member of said second planetary gear set; a second interconnecting member continuously interconnecting said second member of said second planetary gear set and said first member of said third planetary gear set; a stationary transmission housing continuously connected with said second member of said first planetary gear set; a first torque-transmitting clutch selectively interconnecting a member of said first planetary gear set with said first interconnecting member, said second interconnecting member or a member of said second or third planetary gear sets; a second torque-transmitting clutch selectively interconnecting a member of said second planetary gear set with said first interconnecting member, said second interconnecting member or a member of said first or third planetary gear sets; a third torque-transmitting clutch selectively interconnecting a member of said third planetary gear set with said first interconnecting member, said second interconnecting member, or a member of said first or second planetary gear sets; a fourth torque-transmitting clutch selectively interconnecting a member of said first, second, or third planetary gear sets with another member of said first, second, or third planetary gear sets; a fifth torque-transmitting clutch selectively interconnecting a member of said first, second, or third planetary gear sets with said input shaft, said output shaft or a member of said first, second or third planetary gear sets; and said torque-transmitting clutches being engaged in combinations of two to establish at least six forward speed ratios and a reverse ratio between said input shaft and said output shaft.