MULTI-SPEED TRANSMISSION

摘要

A multiple speed transmission includes an input member, an output member, a plurality of planetary gearsets, a plurality of interconnecting members and a plurality of torque-transmitting mechanisms. Each of the plurality of planetary gearsets includes a sun gear, a ring gear, and a carrier member with pinion gears. The input member is continuously interconnected with at least one member of one of the plurality of planetary gear sets, and the output member is continuously interconnected with another member of one of the plurality of planetary gear sets. At least eight forward speeds and one reverse speed are achieved by the selective engagement of the plurality of torque-transmitting mechanisms.

主权项

1. A multiple speed transmission, comprising:
an input member; an output member; first, second, third and fourth planetary gearsets each having first, second and third members; a plurality of interconnecting members each connected to at least one of the first, second, third, and fourth planetary gearsets; a first torque-transmitting mechanism selectively engageable to interconnect the first member of the first planetary gearset and the first member of the second planetary gearset with a stationary member; a second torque-transmitting mechanism selectively engageable to interconnect the second member of the first planetary gearset with the stationary member; a third torque-transmitting mechanism selectively engageable to interconnect the third member of the third planetary gearset with the first member of the third planetary gearset and the first member of the fourth planetary gearset; a fourth torque-transmitting mechanism selectively engageable to interconnect the third member of the first planetary gearset and the third member of the fourth planetary gearset with the third member of the second planetary gearset; and a fifth torque-transmitting mechanism selectively engageable to interconnect the third member of the second planetary gearset with the first member of the third planetary gearset and the first member of the fourth planetary gearset; wherein the torque-transmitting mechanisms are selectively engageable in combinations of at least three to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member.