Patent ID: 6530858
Filing Date: 2003-03-11
Classification: F16H

Abstract:
A family of transmissions having a plurality of family members comprising:an input shaft; an output shaft; a transmission housing; a planetary gear arrangement comprising a first planetary gearset having a first member, a second member, and a third member, a second planetary gearset having a first member, a second member, and a third member, a third planetary gearset having a first member, a second member, and a third member, five selectively engageable torque transmitting mechanisms, and an interconnecting member continuously interconnecting said first member of said first planetary gearset with said first member of said second planetary gearset, said first member of said third planetary gearset being continuously interconnected with said transmission housing, said input shaft being continuously interconnected with one of said members of one of said planetary gearsets, and said output shaft being continuously interconnected with another of said members of one of said planetary gearsets; a first of said torque transmitting mechanisms being selectively engageable to interconnect one of said members of said first planetary gearset with one of a group consisting of said input shaft, said output shaft, a member of said second planetary gearset, and a member of said third planetary gearset; a second of said torque transmitting mechanisms being selectively engageable to interconnect one of said members of said second planetary gearset with one of a group consisting of said input shaft, said output shaft, a member of said first planetary gearset, and a member of said third planetary gearset; a third of said torque transmitting mechanisms being selectively engageable to interconnect one member of said third planetary gearset with one of a group consisting of said input shaft, said output shaft, a member of said first planetary gearset, a member of said second planetary gearset, and said interconnecting member; a fourth of said torque transmitting mechanisms being selectively engageable to interconnect one of a group consisting of one member of one of said planetary gearsets with one of a group consisting of said interconnecting member, and another member of one of said planetary gearsets; a fifth of said torque transmitting mechanisms being selectively engageable to interconnect one of a group consisting of one member of one of said planetary gearsets with one of a group consisting of another member of one of said planetary gearsets and said transmission housing; and said five torque transmitting mechanisms being selectively engaged in combinations of three to establish at least six forward speed ratios and one reverse speed ratio between said input shaft and said output shaft.