Patent ID: 6645115
Filing Date: 2003-11-11
Classification: F16H

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