Family of five-speed transmission mechanisms having three interconnected planetary gear sets

摘要

The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least five forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets, and four torque transmitting mechanisms. The fourth torque transmitting mechanism may be either a brake or a fourth clutch. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the planetary gear arrangement and an output member that is continuously connected with another of the planetary gear members. At least one other planetary gear member is continuously connected with the transmission housing. The three clutches and torque transmitting mechanism provide interconnections between various gear members and with the input, the output shaft, or the transmission housing, in some instances, and are operated in combinations of two to establish at least five forward speed ratios.