Multi-speed transmission with external drive gearsets
View Patent ↗A transmission is provided having an input member, an output member, three planetary gear sets, two external 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. Each of the external gear sets includes first and second gears. The torque transmitting devices include clutches and brakes.
1. A transmission comprising:
an input member;
an output member;
a first, second and third planetary gear sets each having a first, second and third member;
a first and second torque transfer assembly each having a first member and a second member;
a first interconnecting member continuously interconnecting the first member of the first torque transfer assembly directly to the second member of the first planetary gear set;
a second interconnecting member continuously interconnecting the third member of the first planetary gear set directly to the second member of the second planetary gear set;
a third interconnecting member continuously interconnecting the first member of the second planetary gear set directly to the first member of the third planetary gear set;
a fourth interconnecting member continuously interconnecting the second member of the third planetary gear set directly to the first member of the second torque transfer assembly; and
six torque transmitting mechanisms each selectively engageable to interconnect at least one of the first members, second members, third members of the first, second and third planetary gear sets, first members and second members of the first and second torque transfer assemblies with at least one other of the first members, second members, third members of the first, second and third planetary gear sets, the first members and the second members of the first and second torque transfer assemblies and a stationary member, and wherein the six torque transmitting mechanisms are each selectively engageable in combinations of at least three to establish at least ten 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 six torque transmitting mechanisms is selectively engageable to interconnect the second member of the first planetary gear set with at least one of the first member of the second planetary gear set and first member of the third planetary gear set.
3. The transmission of claim 2 wherein a second of the six torque transmitting mechanisms is selectively engageable to interconnect the second member of the first torque transfer assembly with the second member of the second torque transfer assembly.
4. The transmission of claim 3 wherein a third of the six torque transmitting mechanisms is selectively engageable to interconnect the first member of the first planetary gear set and the input member with at least one of the first member of the second torque transfer assembly and the second member of the third planetary gear set.
5. The transmission of claim 4 wherein a fourth of the six torque transmitting mechanisms is selectively engageable to interconnect at least one of the first member of the second torque transfer assembly and the second member of the third planetary gear set with the third member of the second planetary gear set.
6. The transmission of claim 5 wherein a fifth of the six torque transmitting mechanisms is selectively engageable to interconnect the third member of the first planetary gear set and the second member of the second planetary gear set with the stationary member.
7. The transmission of claim 6 wherein a sixth of the six torque transmitting mechanisms is selectively engageable to interconnect the third member of the second planetary gear set with the stationary member.
8. The transmission of claim 1 wherein the input member is continuously interconnected with the first member of the first planetary gear set and wherein the output member is continuously interconnected with the third member of the third planetary gear set.
9. The transmission of claim 1 wherein the first member of the first planetary gear set and the first member of the third planetary gear set, the third members of the second planetary gear sets are sun gears, the second members of the first, second and third planetary gear sets are carrier members and the third members of the first and third planetary gear sets and the first member of the second planetary gear set are ring gears.
10. The transmission of claim 1 wherein the stationary member is a transmission housing.
11. The transmission of claim 1 wherein the first and the second members of the first and the second torque transfer assemblies each include a first and a second sprocket.
12. The transmission of claim 11 wherein the first and the second torque transfer assemblies each further comprise a third member, wherein the third member is a chain for coupling the first and the second sprocket to transfer torque there between.
13. A transmission comprising:
an input member;
an output member;
a first, second and third planetary gear sets each having a first, second, and third member, wherein the input member is continuously interconnected with the first member of the first planetary gear set and wherein the output member is continuously interconnected with the third member of the third planetary gear set;
a first and a second co-planar gear set each having a first member and a second member;
a first interconnecting member continuously interconnecting the first member of the first co-planar gear set with the second member of the first planetary gear set;
a second interconnecting member continuously interconnecting the third member of the first planetary gear set with the second member of the second planetary gear set;
a third interconnecting member continuously interconnecting the first member of the second planetary gear set with the first member of the third planetary gear set;
a fourth interconnecting member continuously interconnecting the second member of the third planetary gear set with the first member of the second co-planar gear set;
a first torque transmitting mechanism selectively engageable to interconnect the second member of the first planetary gear set with at least one of the first member of the second planetary gear set and first member of the third planetary gear set;
a second torque transmitting mechanism selectively engageable to interconnect the second member of the first co-planar gear set with the second member of the second co-planar gear set;
a third torque transmitting mechanism selectively engageable to interconnect the first member of the first planetary gear set and the input member with at least one of the first member of the second co-planar gear set and the second member of the third planetary gear set;
a fourth torque transmitting mechanism selectively engageable to interconnect at least one of the first member of the second co-planar gear set and the second member of the third planetary gear set with the third member of the second planetary gear set;
a fifth torque transmitting mechanism selectively engageable to interconnect the third member of the first planetary gear set and the second member of the second planetary gear set with the stationary member;
a sixth torque transmitting mechanism selectively engageable to interconnect the third member of the second planetary gear set with the stationary member, and
wherein the torque transmitting mechanisms are each selectively engageable in combinations of at least three to establish at least ten forward speed ratios and at least one reverse speed ratio between the input member and the output member.
14. The transmission of claim 13 wherein the first member of the first planetary gear set and the first member of the third planetary gear set, the third members of the second planetary gear sets are sun gears, the second members of the first, second and third planetary gear sets are carrier members and the third members of the first and third planetary gear sets and the first member of the second planetary gear set are ring gears.
15. The transmission of claim 13 wherein the stationary member is a transmission housing.
16. The transmission of claim 13 wherein the first and the second members of the first and the second co-planar gear sets are a first and a second intermeshing gears.
17. The transmission of claim 13 wherein the first and the second members of the first and the second co-planar gear sets are a first and a second sprockets.
18. The transmission of claim 17 wherein the first and the second co-planar gear sets each further comprise a third member, wherein the third member is a chain for coupling the first and second sprockets to transfer torque there between.
19. A transmission comprising:
an input member;
an output member;
a first, second and third planetary gear sets each having a sun gear, carrier member, and ring gear, wherein the input member is continuously interconnected with the sun gear of the first planetary gear set and wherein the output member is continuously interconnected with the ring gear of the third planetary gear set;
a first and second co-planar gear set each having a first gear and a second gear;
a first interconnecting member continuously interconnecting the first gear of the first co-planar gear set with the carrier member of the first planetary gear set;
a second interconnecting member continuously interconnecting the ring gear of the first planetary gear set with the carrier member of the second planetary gear set;
a third interconnecting member continuously interconnecting the ring gear member of the second planetary gear set with the sun gear of the third planetary gear set;
a fourth interconnecting member continuously interconnecting the carrier member of the third planetary gear set with the first gear of the second co-planar gear set;
a first torque transmitting mechanism selectively engageable to interconnect the carrier member of the first planetary gear set with at least one of the ring gear of the second planetary gear set and sun gear of the third planetary gear set;
a second torque transmitting mechanism selectively engageable to interconnect the second gear of the first co-planar gear set with the second gear of the second co-planar gear set;
a third torque transmitting mechanism selectively engageable to interconnect the sun gear of the first planetary gear set and the input member with at least one of the first gear of the second co-planar gear set and the second carrier of the third planetary gear set;
a fourth torque transmitting mechanism selectively engageable to interconnect at least one of the first gear of the second co-planar gear set and the carrier member of the third planetary gear set with the sun gear member of the second planetary gear set;
a fifth torque transmitting mechanism selectively engageable to interconnect the ring gear of the first planetary gear set and the carrier member of the second planetary gear set with the stationary member;
a sixth torque transmitting mechanism selectively engageable to interconnect the sun gear member of the second planetary gear set with the stationary member, and
wherein the torque transmitting mechanisms are each selectively engageable in combinations of at least three to establish at least ten forward speed ratios and at least one reverse speed ratio between the input member and the output member.
20. The transmission of claim 19 wherein the stationary member is a transmission housing.