# US 2013/0157799 A1 · Multi-speed transmission having three planetary gear sets > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0157799 A1 - Document ID: US20130157799A1 - Status: Published application - Kind: A1 - Application number: 13/769,652 - Filed: 2013-02-18 - Published: 2013-06-20 - Earliest claimed: 2010-10-20 - Assignees: GM Global Technology Operations LLC - Inventors: James M. Hart; James B. Borgerson - Web page: https://patentgrep.com/patent/US20130157799A1 ## CPC - F16H 3/666: {with intermeshing orbital gears (F16H3/663 takes precedence)} - F16H 3/62: Gearings having three or more central gears (F16H3/68 - F16H3/78 take precedence) - F16H 3/66: composed of a number of gear trains without drive passing from one train to another - F16H 3/663: {with conveying rotary motion between axially spaced orbital gears, e.g. a stepped orbital gear or Ravigneaux} - F16H 2200/0052: the gear ratios comprising six forward speeds - F16H 2200/2007: with two sets of orbital gears - F16H 2200/201: with three sets of orbital gears - F16H 2200/2043: with five engaging means - F16H: GEARING ## Abstract A transmission includes 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. ## Claims ### Claim 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 first member of the first planetary gear set and the output member is continuously interconnected to the third member of the third planetary gear set; a first interconnecting member continuously interconnecting the second member of the first planetary gear set with the first member of the second 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 third member of the first planetary gear set with the first member of the third planetary gear set; and five torque transmitting mechanisms each selectively engageable to interconnect at least one of the first, second and third members of the first, second and third planetary gear sets with at least one other of the first, second, third members 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. ### Claim 2 (depends on 1) The transmission of claim 1 wherein a first of the five torque transmitting mechanisms is selectively engageable to interconnect the first member of the first planetary gear set with the second member of the third planetary gear set. ### Claim 3 (depends on 2) The transmission of claim 2 wherein a second of the five torque transmitting mechanisms is selectively engageable to interconnect the second member of the first planetary gear set and the first member of the second planetary gear set with the second member of the third planetary gear set. ### Claim 4 (depends on 3) The transmission of claim 3 wherein a third of the five torque transmitting mechanisms is selectively engageable to interconnect the third member of the first planetary gear set, the first member of the third planetary gear set, and the second member of the second planetary gear set with the stationary member. ### Claim 5 (depends on 4) The transmission of claim 4 wherein a fourth of the five torque transmitting mechanisms is selectively engageable to interconnect the third member of the second planetary gear set with the stationary member. ### Claim 6 (depends on 5) The transmission of claim 5 wherein a fifth of the five torque transmitting mechanisms is selectively engageable to interconnect the second member of the third planetary gear set with the stationary member. ### Claim 7 (depends on 6) The transmission of claim 6 wherein the first member of the first planetary gear set, the third member of the second planetary gear set, and the first member of the third planetary gear set are sun gears, the first and second planetary gear sets include a carrier member that includes the second member of the first planetary gear set, the first member of the second planetary gear set, and the first interconnecting member, and the second planetary gear set includes a ring gear that includes the third member of the first planetary gear set, the first member of the second planetary gear set, and the second interconnecting member, the second member of the fourth planetary gear set is a carrier member, and the third member of the fourth planetary gear set is a ring gear. ### Claim 8 (depends on 1) The transmission of claim 1 wherein the first member of the first planetary gear set, the third member of the second planetary gear set and the first member of the third planetary gear set are sun gears, the second member of the first planetary gear set, the first member of the second planetary gear set, and the second member of the third planetary gear set are carrier members, and the third member of the first planetary gear set, the second member of the second planetary gear set, and the third member of the third planetary gear set are ring gears. ### Claim 9 (depends on 8) The transmission of claim 8 wherein the transmission includes a common carrier member and a common ring gear, the common carrier member including the carrier members of the first and second planetary gear sets and the first interconnecting member, and the common ring gear including the ring gears of the first and second planetary gear sets and the second interconnecting member. ### Claim 10 (depends on 9) The transmission of claim 9 wherein the first planetary gear set includes a set of long pinion gears rotatably supported by the common carrier member and meshes with each of the sun gear of the first planetary gear set and the common ring gear. ### Claim 11 (depends on 10) The transmission of claim 10 wherein the second planetary gear set includes a set of short pinion gears rotatably supported by the common carrier member and meshes with each of the sun gear of the second planetary gear set and the set of pinion gears of the first planetary gear set. ### Claim 12 (depends on 11) The transmission of claim 11 wherein the first planetary gear set is disposed between the second and the third planetary gear sets and the first, second, and fifth of the five torque transmitting mechanisms are disposed between the first planetary gear set and the third planetary gear set. ### Claim 13 (depends on 12) The transmission of claim 12 wherein the third and fourth torque transmitting mechanisms are disposed at a first end of the transmission adjacent the second planetary gear set. ### Claim 14 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 first member of the first planetary gear set and the output member is continuously interconnected to the third member of the third planetary gear set; three interconnecting members each selectively engageable to interconnect one of the first, second and third members of the first, second and third planetary gear sets with one other of the first, second, third members of the first, second and third planetary gear sets; a first 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 second torque transmitting mechanism selectively engageable to interconnect the first interconnecting member with the second member of the third planetary gear set; a third torque transmitting mechanism selectively engageable to interconnect at least one of the second interconnecting member and the third interconnecting member with a stationary member; a fourth torque transmitting mechanism selectively engageable to interconnect the third member of the second planetary gear set with the stationary member; a fifth torque transmitting mechanism selectively engageable to interconnect the second 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. ### Claim 15 (depends on 14) The transmission of claim 14 wherein a first of the three interconnecting members continuously interconnect the second member of the first planetary gear set with the first member of the second planetary gear set. ### Claim 16 (depends on 15) The transmission of claim 15 wherein a second of the three interconnecting members continuously interconnects the third member of the first planetary gear set with the second member of the second planetary gear set. ### Claim 17 (depends on 16) The transmission of claim 16 wherein a third of the three interconnecting members continuously interconnects the third member of the first planetary gear set with the first member of the third planetary gear set. ### Claim 18 (depends on 17) The transmission of claim 17 wherein the first member of the first planetary gear set, the third member of the second planetary gear set, and the first member of the third planetary gear set are sun gears, the first and second planetary gear sets include a carrier member that includes the second member of the first planetary gear set, the first member of the second planetary gear set, and the first interconnecting member, and the second planetary gear set includes a ring gear that includes the third member of the first planetary gear set, the first member of the second planetary gear set, and the second interconnecting member, the second member of the fourth planetary gear set is a carrier member, and the third member of the fourth planetary gear set is a ring gear. ### Claim 19 (depends on 17) The transmission of claim 17 wherein the first member of the first planetary gear set, the third member of the second planetary gear set and the first member of the third planetary gear set are sun gears, the second member of the first planetary gear set, the first member of the second planetary gear set, and the second member of the third planetary gear set are carrier members, and the third member of the first planetary gear set, the second member of the second planetary gear set, and the third member of the third planetary gear set are ring gears. ### Claim 20 (depends on 19) The transmission of claim 19 wherein the transmission includes a common carrier member and a common ring gear, the common carrier member including the carrier members of the first and second planetary gear sets and the first interconnecting member, and the common ring gear including the ring gears of the first and second planetary gear sets and the second interconnecting member. ### Claim 21 (depends on 20) The transmission of claim 20 wherein the first planetary gear set includes a set of long pinion gears rotatably supported by the common carrier member and meshes with each of the sun gear of the first planetary gear set and the common ring gear. ### Claim 22 (depends on 21) The transmission of claim 21 wherein the second planetary gear set includes a set of short pinion gears rotatably supported by the common carrier member and meshes with each of the sun gear of the second planetary gear set and the set of long pinion gears of the first planetary gear set. ### Claim 23 (depends on 24) The transmission of claim 24 wherein the first planetary gear set is disposed between the second and the third planetary gear sets and the first, second, and fifth of the five torque transmitting mechanisms are disposed between the first planetary gear set and the third planetary gear set. ### Claim 24 (depends on 23) The transmission of claim 23 wherein the third and fourth torque transmitting mechanisms are disposed at a first end of the transmission adjacent the second planetary gear set. ### Claim 25 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 first member of the first planetary gear set and the output member is continuously interconnected to the third member of the third planetary gear set; a first interconnecting member continuously interconnecting the second member of the first planetary gear set with the first member of the second 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 third member of the first planetary gear set with the first member of the third planetary gear set; a first 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 second torque transmitting mechanism selectively engageable to interconnect the first interconnecting member with the second member of the third planetary gear set; a third torque transmitting mechanism selectively engageable to interconnect at least one of the second interconnecting member and the third interconnecting member with the stationary member; a fourth torque transmitting mechanism selectively engageable to interconnect the third member of the second planetary gear set with the stationary member; a fifth torque transmitting mechanism selectively engageable to interconnect the second 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. ### Claim 26 (depends on 25) The transmission of claim 25 wherein the first member of the first planetary gear set, the third member of the second planetary gear set, and the first member of the third planetary gear set are sun gears, the first and second planetary gear sets include a carrier member that includes the second member of the first planetary gear set, the first member of the second planetary gear set, and the first interconnecting member, and the second planetary gear set includes a ring gear that includes the third member of the first planetary gear set, the first member of the second planetary gear set, and the second interconnecting member, the second member of the fourth planetary gear set is a carrier member, and the third member of the fourth planetary gear set is a ring gear. ### Claim 27 (depends on 25) The transmission of claim 25 wherein the first member of the first planetary gear set, the third member of the second planetary gear set and the first member of the third planetary gear set are sun gears, the second member of the first planetary gear set, the first member of the second planetary gear set, and the second member of the third planetary gear set are carrier members, and the third member of the first planetary gear set, the second member of the second planetary gear set, and the third member of the third planetary gear set are ring gears. ### Claim 28 (depends on 27) The transmission of claim 27 wherein the transmission includes a common carrier member and a common ring gear, the common carrier member including the carrier members of the first and second planetary gear sets and the first interconnecting member, and the common ring gear including the ring gears of the first and second planetary gear sets and the second interconnecting member. ### Claim 29 (depends on 28) The transmission of claim 28 wherein the first planetary gear set includes a set of long pinion gears rotatably supported by the common carrier member and meshes with each of the sun gear of the first planetary gear set and the common ring gear. ### Claim 30 (depends on 29) The transmission of claim 29 wherein the second planetary gear set includes a set of short pinion gears rotatably supported by the common carrier member and meshes with each of the sun gear of the second planetary gear set and the set of long pinion gears of the first planetary gear set. ### Claim 31 (depends on 30) The transmission of claim 30 wherein the first planetary gear set is disposed between the second and the third planetary gear sets and the first, second, and fifth of the five torque transmitting mechanisms are disposed between the first planetary gear set and the third planetary gear set. ### Claim 32 (depends on 31) The transmission of claim 31 wherein the third and fourth torque transmitting mechanisms are disposed at a first end of the transmission adjacent the second planetary gear set.