Multi-speed transmission
View Patent ↗A transmission is provided having an input member, an output member, three planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes.
1. A transmission comprising:
an input member;
an output member;
first, second, and third planetary gear sets each having first, second and third members, wherein the input member is continuously interconnected to the third member of the third planetary gear set and the output member is continuously interconnected to the third member of the second planetary gear set;
a first interconnecting member continuously interconnecting the first member of the first planetary gear set with the first member of the second planetary gear set;
a second interconnecting member continuously interconnecting the second member of the first planetary gear set with the second member of the second planetary gear set;
a first torque transmitting mechanism selectively engageable to interconnect the second member of the second planetary gear set with the third member of the third planetary gear set;
a second torque transmitting mechanism selectively engageable to interconnect the third member of the first planetary gear set with the second member of the third planetary gear set;
a third torque transmitting mechanism selectively engageable to interconnect the first member of the first planetary gear set with the second member of the third planetary gear set;
a fourth torque transmitting mechanism selectively engageable to interconnect the first member of the first planetary gear set with the first member of the third planetary gear set;
a fifth torque transmitting mechanism selectively engageable to interconnect the first member of the third planetary gear set with the stationary element; and
a sixth torque transmitting mechanism selectively engageable to interconnect the second member of the second planetary gear set with the stationary element,
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.
2. The transmission of claim 1 wherein the first members are sun gears, the second members are carrier members, and the third members are ring gears.
3. A transmission comprising:
an input member;
an output member;
first, second, and third planetary gear sets each having a sun gear member, a carrier member and a ring gear member, wherein the input member is continuously interconnected to the ring gear member of the third planetary gear set and the output member is continuously interconnected to the ring gear member of the second planetary gear set;
a first interconnecting member continuously interconnecting the sun gear member of the first planetary gear set with the sun gear member of the second planetary gear set;
a second interconnecting member continuously interconnecting the carrier member of the first planetary gear set with the carrier member of the second planetary gear set;
a first torque transmitting mechanism selectively engageable to interconnect the carrier member of the second planetary gear set with the ring gear member of the third planetary gear set;
a second torque transmitting mechanism selectively engageable to interconnect the ring gear member of the first planetary gear set with the carrier member of the third planetary gear set;
a third torque transmitting mechanism selectively engageable to interconnect the sun gear member of the first planetary gear set with the carrier member of the third planetary gear set;
a fourth torque transmitting mechanism selectively engageable to interconnect the sun gear member of the first planetary gear set with the sun gear member of the third planetary gear set;
a fifth torque transmitting mechanism selectively engageable to interconnect the sun gear member of the third planetary gear set with the stationary element; and
a sixth torque transmitting mechanism selectively engageable to interconnect the carrier member of the second planetary gear set with the stationary element,
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.