Multi-speed transmission

摘要

A transmission includes an input and output member, four planetary gear sets each having first, second and third members, five interconnecting members continuously interconnecting members of the four planetary gear sets and six torque transmitting mechanisms selectively engageable to interconnect one of the first members, second members, and third members with at least one of another of the first members, second members, third members, and a stationary member. 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.

主权项

1. A transmission comprising:
an input member; an output member; first, second, third and fourth planetary gear sets each having first, second and third members, and wherein the output member is directly connected with the first member of the second planetary gear set; a first interconnecting member continuously interconnecting the second member of the first planetary gear set directly with the third member of the second planetary gear set; a second interconnecting member continuously interconnecting the third member of the first planetary gear set directly with the second member of the second planetary gear set; a third interconnecting member continuously interconnecting the second member of the second planetary gear set directly with the first member of the fourth planetary gear set; a fourth interconnecting member continuously interconnecting the second member of the third planetary gear set directly with the third member of the fourth planetary gear set; a fifth interconnecting member continuously interconnecting the third member of the third planetary gear set directly with the second member of the fourth planetary gear set; and six torque transmitting mechanisms each selectively engageable to interconnect a respective one of the first members, second members, and third members of the first, second, third, and fourth planetary gear sets directly with another respective one of the first members, second members, and third members of the first, second, third, and fourth planetary gear sets, or a stationary member, and 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.