Patent ID: 6736750
Filing Date: 2004-05-18
Classification: F16H

Abstract:
A power transmission comprising:an input shaft; an output shaft; a 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 continuously interconnecting said first member of said first planetary gearset with said first member of said second planetary gearset; a second interconnecting member continuously interconnecting said second member of said first planetary gearset with said first member of said third planetary gearset; a third interconnecting member continuously interconnecting said second member of said second planetary gearset with said second member of said third planetary gearset; said third member of one of said planetary gearsets being continuously interconnected with said transmission housing; said output shaft being continuously interconnected with at least one member of one of said planetary gearsets; and six torque-transmitting mechanisms being selectively engaged in combinations two to establish at least seven forward speed ratios and one reverse speed ratio within said planetary gearsets between said input shaft and said output shaft where either: said first torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said third planetary gearset, said second torque-transmitting mechanism selectively interconnecting said input shaft and said third interconnecting member, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said second planetary gearset, said fourth torque-transmitting mechanism selectively interconnecting said third member of said third planetary gearset with said third interconnecting member, said fifth torque-transmitting mechanism selectively interconnecting said transmission housing with said third member of said third planetary gearset, and said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said third interconnecting member, 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 second 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 transmission housing with said second interconnecting member, and said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said third member of said third planetary gearset, 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 second 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 third planetary gearset with said second interconnecting member, said fifth torque-transmitting mechanism selectively interconnecting said transmission housing with said first interconnecting member, said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said third member of said third planetary gearset, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said second planetary gearset, said second torque-transmitting mechanism selectively interconnecting said input shaft with said third 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 transmission housing with said third member of said second planetary gearset, and said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said third interconnecting member, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said first interconnecting member said second torque-transmitting mechanism selectively interconnecting said input shaft with said second interconnecting member, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said second planetary gearset, said fourth torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said third planetary gearset, said fifth torque-transmitting mechanism selectively interconnecting said third member of said third planetary gearset with said second interconnecting member, and said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said first interconnecting member, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said first interconnecting member, said second torque-transmitting mechanism selectively interconnecting said input shaft with said third 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 second interconnecting member with said output shaft, said fifth torque-transmitting-mechanism selectively interconnecting said second interconnecting member with said third interconnecting member, and said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said first interconnecting member, or 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 interconnecting member, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said second 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 first interconnecting member, and said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said second interconnecting member, or said first toque-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 interconnecting member, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said second 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 third interconnecting member, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said first interconnecting member, said second torque-transmitting mechanism selectively interconnecting said input shaft with said second interconnecting member, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third interconnecting member, said fourth torque-transmitting mechanism selectively interconnecting said third member of said second planet gearset with said output shaft, said fifth torque-transmitting mechanism selectively interconnecting said transmission housing with said second interconnecting member, said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said third interconnecting member, or 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 second planetary gearset, said third torque-transmitting mechanism selectively interconnecting said third member of said second planetary gearset with said output shaft, said fifth torque-transmitting mechanism selectively interconnecting said transmission housing with said second interconnecting member, and said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said first interconnecting member, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said first interconnecting member, said second torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said second planetary gearset, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third interconnecting member, said fourth torque-transmitting mechanism selectively interconnecting sad third member of said second planetary gearset with said second interconnecting member, said fifth torque-transmitting mechanism selectively interconnecting said third interconnecting member with said output shaft, and said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said third interconnecting member, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said first 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 first interconnecting member with said output shaft, said fourth torque-transmitting mechanism selectively interconnecting said second interconnecting member with said output shaft, said fifth torque-transmitting mechanism selectively interconnecting said second interconnecting member with said third interconnecting member, 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 member of said first planetary gearset, said second torque-transmitting mechanism selectively interconnecting said input shaft with said second interconnecting member, 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 first planetary gearset with said third interconnecting member, said fifth torque-transmitting mechanism selectively interconnecting said transmission housing with said third interconnecting member, and said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said third member of said first planetary gearset, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said first 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 second interconnecting member, 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 first planetary gearset with said output shaft, and said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said first interconnecting member, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said first interconnecting member, said second torque-transmitting mechanism selectively interconnecting said input shaft with said third member of said second planetary gearset, said third torque-transmitting mechanism selectively interconnecting said input shaft with said third interconnecting member, said fourth torque-transmitting mechanism selectively interconnecting said first interconnecting member with said output shaft, said fifth torque-transmitting mechanism selectively interconnecting said second interconnecting member with said output shaft, and said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said second interconnecting member, or said first torque-transmitting mechanism selectively interconnecting said input shaft with said first 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 second interconnecting member, said fourth torque-transmitting mechanism selectively interconnecting said third member of said first planetary gearset with said third interconnecting member, said fifth torque-transmitting mechanism selectively interconnecting said second interconnecting member with said third interconnecting member, and said sixth torque-transmitting mechanism selectively interconnecting said transmission housing with said third member of said first planetary gearset.