Patent ID: 6767306
Filing Date: 2004-07-27
Classification: F16H

Abstract:
A 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; a first interconnecting member continuously interconnecting said first member of said first planetary gear set with said first member of said second planetary gear set; said first member of said third planetary gear set being continuously connected with a stationary member; a first torque-transmitting mechanism selectively interconnecting a member of said first planetary gear set with a member of said third planetary gear set; a second torque-transmitting mechanism selectively interconnecting a member of said second planetary gear set with a member of said third planetary gear set; a third torque-transmitting mechanism selectively interconnecting a member of said third planetary gear set with a member of said second planetary gear set, the pair of members interconnected by said third torque-transmitting mechanism being different from the pair of members interconnected by said second torque-transmitting mechanism; a fourth torque-transmitting mechanism selectively interconnecting a member of said first planetary gear set with a member of said second or third planetary gear set, the pair of members interconnected by said fourth torque-transmitting mechanism being different from the pair of members interconnected by said first torque-transmitting mechanism; a fifth torque-transmitting mechanism selectively interconnecting a member of said first planetary gear set with a member of said second or third planetary gear set or with said stationary member, the pair of members interconnected by said fifth torque-transmitting mechanism being different from the pairs of members interconnected by said first and fourth torque-transmitting mechanisms, respectively; and a sixth torque-transmitting mechanism selectively interconnecting a member of said first, second or third planetary gear set with another member of said first or third planetary gear set, or with said stationary member, the pair of members interconnected by said sixth torque-transmitting mechanism being different from the pairs of members interconnected by said first, second, third, fourth and fifth torque-transmitting mechanisms, respectively; said torque-transmitting mechanisms being engaged in combinations of three to establish at least seven forward speed ratios and at least one reverse speed ratio between said input shaft and said output shaft.