Patent ID: 6773371
Filing Date: 2004-08-10
Classification: F16H

Abstract:
transmission-comprising:an input shaft; an output shaft; a stationary transmission housing; a first planetary gearset having first, second, and third members; a second planetary gearset having first, second, and third members; a third planetary gearset having first, second, and third members; a first interconnecting member for interconnecting said first member of said first planetary gearset with said first member of said second planetary gearset; a second interconnecting member continuously interconnecting a second member of said first planetary gearset with said second member of said second planetary gearset; a third interconnecting member continuously interconnecting a first member of said third planetary gearset with a member selected from a group consisting of said second member of said second planetary gearset and said third member of said second planetary gearset; a member of said first planetary gearset being continuously interconnected with said transmission housing; said output shaft being continuously connected with at least one member of one of said planetary gearsets; and six torque-transmitting mechanisms being selectively engageable in combinations of two to establish at least seven forward speed ratios and one reverse speed ratio within said transmission wherein: said first torque transmitting mechanism selectively interconnecting said input shaft with said second interconnecting member, said second torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said first planetary gearset, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said third planetary gearset, said fourth torque-transmitting mechanism selectively interconnecting said second interconnecting member with said output shaft, said fifth a torque-transmitting mechanism selectively interconnecting said third interconnecting member with said output shaft and said sixth torque-transmitting mechanism selectively interconnecting said second interconnecting member with said transmission housing, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said second interconnecting member, said second torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said first planetary gearset, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said third planetary gearset, said fourth torque-transmitting mechanism selectively interconnecting said second interconnecting member with said output shaft, said fifth torque-transmitting mechanism selectively interconnecting said third interconnecting member with said output shaft and said sixth torque-transmitting mechanism selectively interconnecting said third member of said first planetary gearset with said transmission housing, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said second interconnecting member, said second torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said first planetary gearset, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said third planetary gearset, said fourth torque-transmitting mechanism selectively interconnecting said third member of said first planetary gearset with said second interconnecting member, said fifth torque-transmitting mechanism selectively interconnecting said second interconnecting member with said output shaft, and said sixth torque-transmitting mechanism selectively interconnecting said third interconnecting member with said output shaft, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said second interconnecting member, said second torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said first planetary gearset, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said third planetary gearset, said fourth torque-transmitting mechanism selectively interconnecting said second interconnecting member with said third interconnecting member, said fifth torque-transmitting mechanism selectively interconnecting said second interconnecting member with said output shaft, and said sixth torque-transmitting mechanism selectively interconnecting said third interconnecting member with paid output shaft, or said first torque transmitting mechanism selectively interconnecting said input shaft with said second interconnecting member, said second torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said first planetary gearset, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said third planetary gearset, said fourth torque-transmitting mechanism selectively interconnecting said second interconnecting member with said output shaft, said fifth torque-transmitting mechanism selectively interconnecting said third member of said first planetary gearset with said third interconnecting member, and said sixth torque-transmitting mechanism selectively interconnecting said third interconnecting member with said output shaft, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said second interconnecting member, said second torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said third planetary gearset, said third torque-transmitting mechanism selectively interconnecting said second interconnecting member with said output shaft, said fourth torque-transmitting mechanism selectively interconnecting said third member of said first planetary gearset with said output shaft, said fifth torque-transmitting mechanism selectively interconnecting said third member of said first planetary gearset with said third member of said third planetary gearset, and said sixth torque-transmitting mechanism selectively interconnecting said third member of said third planetary gearset with said output shaft, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said third interconnecting member, said second torque-transmitting mechanism selectively interconnecting said input shaft with said first interconnecting member, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said third planetary gearset, said fourth torque-transmitting mechanism selectively interconnecting said first interconnecting member with said output shaft, said fifth torque-transmitting mechanism selectively interconnecting said third member of said second planetary gearset with said output shaft, and said sixth torque-transmitting mechanism selectively interconnecting said first interconnecting member with said housing, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said third interconnecting member, said second torque-transmitting mechanism selectively interconnecting said input shaft with said first interconnecting member, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said third planetary gearset, said fourth torque-transmitting mechanism selectively interconnecting said first interconnecting member with said third interconnecting member, said fifth torque-transmitting mechanism selectively interconnecting said first interconnecting member with said output shaft, and said sixth torque-transmitting mechanism selectively interconnecting said third member of said second planetary gearset with said output shaft, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said first interconnecting member, said second torque transmitting mechanism selectively interconnecting an said input shaft with said third member of said third planetary gearset, said third torque-transmitting mechanism selectively interconnecting said first interconnecting member with said output shaft, said fourth torque-transmitting mechanism selectively interconnecting said third member of said second planetary gearset with said third member of said third planetary gearset, said fifth torque-transmitting mechanism selectively interconnecting said third member of said second planetary gearset with said output shaft, and said sixth torque-transmitting mechanism selectively interconnecting said third member of said third planetary gearset with said output shaft.