Family of multi-speed planetary transmissions with a stationary planetary member and input clutches

摘要

A family of power transmissions has a plurality of family members each of which have three planetary gearsets (20,30,40), each having three members, and six torque transmitting mechanisms (50,52,54,56,58,60). An output shaft is continuously interconnected with at least one planetary member (24). An input shaft (17) is selectively interconnected with respective planetary members through at least two of the torque transmitting mechanisms (50,52). One member of the second planetary gearset (34) and one member of the third planetary gearset (49) are continuously interconnected, and another member of the third planetary gearset (44) is continuously interconnected with a transmission housing (62). The remaining torque transmitting mechanisms provide selective interconnections between two planetary members or between a planetary member and the housing, the input shaft (17), and the output shaft (19). The torque transmitting mechanisms are selectively engaged in combinations of four to establish at least seven forward speeds and one reverse speed. <IMAGE>