Patent ID: 6425841
Filing Date: 2002-07-30
Classification: F16H

Abstract:
A power transmission comprising:a transmission housing; an engine driven input shaft; an output shaft; a dedicated planetary gear set having a first member continuously connected with said engine driven input shaft, a second member continuously connected with said transmission housing, and a third member; first and second selectively engageable torque transmitting mechanisms operatively connected with said third member of said dedicated planetary gear set; third and fourth selectively engageable torque transmitting mechanisms operatively connected with said engine driven input shaft; a fifth selectively engageable torque transmitting mechanism; a second planetary gear set having a first member operatively connected with both said first and third torque transmitting mechanisms, a second member operatively connected with said second and fourth torque transmitting mechanisms, and a third member continuously connected with said output shaft; a third planetary gear set having a first member continuously connected with one of said first member of said second planetary gear set and said second member of said second planetary gear set, a second member continuously connected with said second member of said second planetary gear set when said first member of said third planetary gear set is connected with said first member of said second planetary gear set, and operatively connected with said fifth torque transmitting mechanism when said member of said third planetary gear set is connected with said second member of said second planetary gear set, and a third member being operatively connected with said fifth torque transmitting mechanism when said first member of said third planetary gear set is connected with said first member of said second planetary gear set and said second member of said third planetary gear set is connected with said second member of said second planetary gear set and continuously connected with said output shaft when said first member of said third planetary gear set is connected with said second member of said second planetary gear set and said second member of said third planetary gear set is connected with said fifth torque transmitting mechanism; and said first, second, third, and fourth torque transmitting mechanisms being rotating devices, and said fifth torque transmitting mechanism being a stationary device, and said torque transmitting mechanisms being selectively engaged in combinations of two to establish at least six forward drive ratios and at least one reverse drive ratio between said engine driven input shaft and said output shaft.