Multi-speed transmission having three planetary gear sets
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 include clutches and brakes.
1. A transmission comprising:
an input member;
an output member;
first, second and third planetary gear sets each having a sun gear, a carrier member, and a ring gear, wherein the input and output members are each interconnected to at least one of the first, second, and third planetary gear sets;
a first interconnecting member continuously interconnecting the carrier member of the first planetary gear set with the carrier member of the second planetary gear set;
a second interconnecting member continuously interconnecting the ring gear of the first planetary gear set with the ring gear of the second planetary gear set and with the sun gear of the third planetary gear set; and
five torque transmitting mechanisms each selectively engageable to interconnect at least one of the sun gears, carrier members, and ring gears of the first, second and third planetary gear sets with at least one other of the sun gears, carrier members, and ring gears and a stationary member, and
wherein the torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least six 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 a first of the five torque transmitting mechanisms is selectively engageable to interconnect the sun gear of the first planetary gear set with the carrier member of the third planetary gear set.
3. The transmission of claim 2 wherein a second of the five torque transmitting mechanisms is selectively engageable to interconnect the carrier member of the first planetary gear set and the carrier member of the second planetary gear set with the carrier member of the third planetary gear set.
4. The transmission of claim 3 wherein a third of the five torque transmitting mechanisms is selectively engageable to interconnect the ring gear of the first planetary gear set, the sun gear of the third planetary gear set, and the ring gear of the second planetary gear set with the stationary member.
5. The transmission of claim 4 wherein a fourth of the five torque transmitting mechanisms is selectively engageable to interconnect the sun gear of the second planetary gear set with the stationary member.
6. The transmission of claim 5 wherein a fifth of the five torque transmitting mechanisms is selectively engageable to interconnect the carrier member of the third planetary gear set with the stationary member.
7. The transmission of claim 1 wherein the input member is continuously interconnected to the sun gear of the first planetary gear set.
8. The transmission of claim 1 wherein the output member is continuously interconnected to the ring gear of the third planetary gear set.
9. A transmission comprising:
an input member;
an output member;
first, second and third planetary gear sets each having a sun gear, a carrier member, and a ring gear, wherein the input and output members are each interconnected to at least one of the first, second, and third planetary gear sets;
two interconnecting members each connecting at least one of the sun gears, carrier members, and ring gears of the first, second and third planetary gear sets with at least another one of the sun gears, carrier members, and ring gears and a stationary member, and
a first torque transmitting mechanism selectively engageable to interconnect the sun gear of the first planetary gear set with the carrier member of the third planetary gear set;
a second torque transmitting mechanism selectively engageable to interconnect the carrier member of the first planetary gear set and the carrier member of the second planetary gear set with the carrier member of the third planetary gear set;
a third torque transmitting mechanism selectively engageable to interconnect the ring gear of the first planetary gear set, the sun gear of the third planetary gear set, and the ring gear of the second planetary gear set with the stationary member;
a fourth torque transmitting mechanism selectively engageable to interconnect the sun gear of the second planetary gear set with the stationary member; and
a fifth torque transmitting mechanisms is selectively engageable to interconnect the carrier member of the third planetary gear set with the stationary member, and
wherein the torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least six forward speed ratios and at least one reverse speed ratio between the input member and the output member.
10. The transmission of claim 9 wherein a first of the two interconnecting members continuously interconnect the carrier member of the first planetary gear set with the carrier member of the second planetary gear set.
11. The transmission of claim 10 wherein a second of the two interconnecting members continuously interconnects the ring gear of the first planetary gear set, the ring gear of the second planetary gear set, and the sun gear of the third planetary gear set.