# US 8,540,600 B2 · Multi-speed planetary transmission with three brakes and four clutches > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,600 B2 - Document ID: US8540600B2 - Status: Granted - Kind: B2 - Application number: 12/954,941 - Filed: 2010-11-29 - Published: 2011-09-08 - Granted: 2013-09-24 - Earliest claimed: 2010-03-03 - Assignees: GM Global Technology Operations LLC - Applicants: Alexander Filippovich Kraynev; Vladimir Konstantinovich Astashev; Konstantin Borisovich Salamandra; Madhusudan Raghavan - Inventors: Alexander Filippovich Kraynev; Vladimir Konstantinovich Astashev; Konstantin Borisovich Salamandra; Madhusudan Raghavan - Web page: https://patentgrep.com/patent/US8540600B2 ## CPC - F16H 3/44: using gears having orbital motion - 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 57/10: Braking arrangements - F16H 2200/006: the gear ratios comprising eight forward speeds - F16H 2200/0065: the gear ratios comprising nine forward speeds - F16H 2200/0069: the gear ratios comprising ten forward speeds - F16H 2200/0086: the gear ratios comprising two reverse speeds - F16H 2200/201: with three sets of orbital gears - F16H 2200/2046: with six engaging means - F16H 2200/2048: with seven engaging means - F16H 2200/2097: comprising an orbital gear set member permanently connected to the housing, e.g. a sun wheel permanently connected to the housing - F16H: GEARING ## Abstract A multi-speed transmission includes an input member, an output member, a stationary member, and a first and a second compound planetary gear set. The first compound planetary gear set has a first, a second, a third, a fourth, and a fifth member. The second compound planetary gear set has a first, a second, a third, and a fourth member. The first member of the second compound planetary gear set is continuously connected for common rotation with the output member. An interconnecting member continuously connects the first member of the first compound planetary gear set for common rotation with the second member of the second compound planetary gear set. The transmission has seven torque-transmitting mechanisms, including three brakes and four rotating-type clutches, that are engagable to establish up to fourteen forward speed ratios between the input member and the output member. ## Claims ### Claim 1 A multi-speed transmission comprising: an input member; an output member; a stationary member; a first and a second compound planetary gear set; wherein the first compound planetary gear set has a first, a second, a third, a fourth, and a fifth member; wherein the second compound planetary gear set has a first, a second, a third, and a fourth member; wherein the members of the planetary gear sets are sun gear members, ring gear members and carrier members; wherein the first member of the second compound planetary gear set is continuously connected for common rotation with the output member; an interconnecting member continuously connecting the first member of the first compound planetary gear set for common rotation with the second member of the second compound planetary gear set; and only seven torque-transmitting mechanisms, including three brakes and four rotating clutches; wherein each of the seven torque-transmitting mechanisms is selectively engagable to interconnect a respective one of the members of the first and the second compound planetary gear sets with the input member, the stationary member or a respective one of the members of the second compound planetary gear set, the seven torque-transmitting mechanisms being engagable in different combinations to establish up to fourteen forward speed ratios and a reverse speed ratio between the input member and the output member. ### Claim 2 (depends on 1) The multi-speed transmission of claim 1, wherein the input member is selectively connectable to the second and the third members of the first compound planetary gear set via engagement of a first and a second of the seven torque-transmitting mechanisms, respectively. ### Claim 3 (depends on 2) The multi-speed transmission of claim 2, wherein the first and the second torque-transmitting mechanisms are located axially adjacent one another with none of the planetary gear set members and none of the other torque-transmitting mechanisms there between. ### Claim 4 (depends on 1) The multi-speed transmission of claim 1, wherein the fourth and the fifth members of the first compound planetary gear set are selectively grounded to the stationary member via engagement of a third and a fourth of the seven torque-transmitting mechanisms, respectively. ### Claim 5 (depends on 4) The multi-speed transmission of claim 4, wherein the input member is selectively connectable to the second and the third members of the first compound planetary gear set via engagement of a first and a second of the seven torque-transmitting mechanisms, respectively; and wherein the first, the second, and the third torque-transmitting mechanisms are located axially adjacent one another with none of the planetary gear set members and none of the other torque-transmitting mechanisms therebetween. ### Claim 6 (depends on 1) The multi-speed transmission of claim 1, wherein the input member is selectively connected for common rotation with the third member of the second compound planetary gear set via engagement of a fifth of the seven torque-transmitting mechanisms. ### Claim 7 (depends on 1) The multi-speed transmission of claim 1, wherein the second member of the second compound planetary gear set is selectively connected for common rotation with the third member of the second planetary gear set via engagement of a sixth of the seven torque-transmitting mechanisms. ### Claim 8 (depends on 1) The multi-speed transmission of claim 1, wherein the fourth member of the second compound planetary gear set is grounded to the stationary member via engagement of a seventh of the seven torque-transmitting mechanisms. ### Claim 9 (depends on 1) The multi-speed transmission of claim 1, wherein the three brakes are band brakes which are selectively engagable to connect different respective members of the compound planetary gear sets to the stationary member. ### Claim 10 (depends on 1) The multi-speed transmission of claim 1, wherein the first, the second, the third, the fourth, and the fifth members of the first compound planetary gear set are a first carrier member, a first sun gear member, a second sun gear member, a first ring gear member and a second ring gear member, respectively; wherein the first carrier member rotatably supports a stepped pinion gear having a relatively small diameter portion that meshes with the first ring gear member and the second sun gear member, and having a relatively large diameter portion that meshes with the first sun gear member and the second ring gear member; wherein the first, the second, the third, and the fourth members of the second compound planetary gear set are a second carrier member, a third ring gear member, a third sun gear member, and a fourth ring gear member, respectively; wherein the second carrier member rotatably supports a third and a fourth set of pinion gears; wherein the third set of pinion gears meshes with the third ring gear member and the third sun gear member; and wherein the fourth set of pinion gears meshes the third set of pinion gears and the fourth ring gear member. ### Claim 11 (depends on 1) The multi-speed transmission of claim 1, wherein the input member is selectively connected to the second member of the first compound planetary gear set via engagement of a first of the seven torque-transmitting mechanisms; wherein the input member is selectively connected to the third member of the first compound planetary gear set via engagement of a second of the seven torque-transmitting mechanisms; wherein the fourth member of the first compound planetary gear set is selectively grounded to the stationary member via engagement of a third of the seven torque-transmitting mechanisms; wherein the fifth member of the first compound planetary gear set is selectively grounded to the stationary member via engagement of a fourth of the seven torque-transmitting mechanisms; wherein the input member is selectively connected for common rotation with the third member of the second compound planetary gear set via engagement of a fifth of the seven torque-transmitting mechanisms; wherein the second member of the second compound planetary gear set is selectively connected for common rotation with the third member of the second planetary gear set via engagement of a sixth of the seven torque-transmitting mechanisms; and wherein the fourth member of the second compound planetary gear set is grounded to the stationary member via engagement of a seventh of the seven torque-transmitting mechanisms. ### Claim 12 (depends on 11) The multi-speed transmission of claim 11, wherein one of the up to fourteen forward speed ratios is determined only by the second compound planetary gear set when only the third, the fourth, and the fifth torque-transmitting mechanisms are engaged. ### Claim 13 (depends on 11) The multi-speed transmission of claim 11, wherein one of the up to fourteen forward speed ratios is established by torque flow from the first compound planetary gear set to the second compound planetary gear set when the seventh torque-transmitting mechanism is engaged and either one of the first and the second torque-transmitting mechanism and one of the third and the fourth torque-transmitting mechanism or both of the first and the second torque-transmitting mechanisms are engaged. ### Claim 14 (depends on 11) The multi-speed transmission of claim 11, wherein one of the up to fourteen forward speed ratios is established by only the first compound planetary gear set when the sixth torque-transmitting mechanism is engaged and either one of the first and the second torque-transmitting mechanisms and one of the third and the fourth torque-transmitting mechanisms or both of the first and the second torque-transmitting mechanisms are engaged. ### Claim 15 (depends on 11) The multi-speed transmission of claim 11, wherein one of the up to fourteen forward speed ratios is established with rotational speed summation at the second compound planetary gear set when the fifth torque-transmitting mechanism is engaged and either one of the first and the second torque-transmitting mechanism and one of the third and the fourth torque-transmitting mechanism or both of the first and the second torque-transmitting mechanisms are engaged. ### Claim 16 A multi-speed transmission comprising: an input member; an output member; a stationary member; a first and a second compound planetary gear set; wherein the first compound planetary gear set has a first, a second, a third, a fourth, and a fifth member; wherein the second compound planetary gear set has a first, a second, a third, and a fourth member; wherein the first, the second, the third, the fourth, and the fifth members of the first compound planetary gear set are a first carrier member, a first sun gear member, a second sun gear member, a first ring gear member and a second ring gear member, respectively; wherein the first carrier member rotatably supports a stepped pinion gear having a relatively small diameter portion that meshes with the first ring gear member and the second sun gear member, and a relatively large diameter portion that meshes with the first sun gear member and the second ring gear member; wherein the first, the second, the third, and the fourth members of the second compound planetary gear set are a second carrier member, a third ring gear member, a third sun gear member, and a fourth ring gear member, respectively; wherein the second carrier member rotatably supports a third and a fourth set of pinion gears; wherein the third set of pinion gears meshes with the third ring gear member and the third sun gear member; wherein the fourth set of pinion gears meshes the third set of pinion gears and the fourth ring gear member; wherein the second carrier member of the second compound planetary gear set is continuously connected for common rotation with the output member; an interconnecting member continuously connecting the first carrier member of the first planetary gear set for common rotation with the third ring gear member of the second planetary gear set; seven selectively engagable torque-transmitting mechanisms; wherein the input member is selectively connectable to the first sun gear member of the first compound planetary gear set via engagement of a first of the seven torque-transmitting mechanisms; wherein the input member is selectively connectable to the second sun gear member of the first compound planetary gear set via engagement of a second of the seven torque-transmitting mechanisms; wherein the first ring gear member of the first compound planetary gear set is selectively grounded to the stationary member via engagement of a third of the seven torque-transmitting mechanisms; wherein the second ring gear member of the first compound planetary gear set is selectively grounded to the stationary member via engagement of a fourth of the seven torque-transmitting mechanisms; wherein the input member is selectively connected for common rotation with the third sun gear member of the second compound planetary gear set via engagement of a fifth of the seven torque-transmitting mechanisms; wherein the third ring gear member of the second compound planetary gear set is selectively connected for common rotation with the third sun gear member of the second compound planetary gear set via engagement of a sixth of the seven torque-transmitting mechanisms; and wherein the fourth ring gear member of the second compound planetary gear set is grounded to the stationary member via engagement of a seventh of the seven torque-transmitting mechanisms, the seven torque-transmitting mechanisms being engagable in different combinations to establish up to fourteen forward speed ratios and a reverse speed ratio between the input member and the output member. ### Claim 17 (depends on 1) The multi-speed transmission of claim 1, wherein the seven torque-transmitting mechanisms are engaged in different combinations of three to establish said up to fourteen forward speed ratios and said reverse speed ratio between the input member and the output member. ### Claim 18 A multi-speed transmission comprising: an input member; an output member; a stationary member; a first and a second compound planetary gear set; wherein the first compound planetary gear set has a first, a second, a third, a fourth, and a fifth member; wherein the second compound planetary gear set has a first, a second, a third, and a fourth member; wherein the members of the planetary gear sets are sun gear members, ring gear members and carrier members; wherein the first member of the second compound planetary gear set is continuously connected for common rotation with the output member; an interconnecting member continuously connecting the first member of the first compound planetary gear set for common rotation with the second member of the second compound planetary gear set; seven torque-transmitting mechanisms, including three brakes and four rotating clutches; wherein each of the seven torque-transmitting mechanisms is selectively engagable to interconnect a respective one of the members of the first and the second compound planetary gear sets with the input member, the stationary member or a respective one of the members of the second compound planetary gear set, the seven torque-transmitting mechanisms being engagable in different combinations to establish up to fourteen forward speed ratios and a reverse speed ratio between the input member and the output member; wherein the fourth and the fifth members of the first compound planetary gear set are selectively grounded to the stationary member via engagement of a third and a fourth of the seven torque-transmitting mechanisms, respectively; wherein the input member is selectively connectable to the second and the third members of the first compound planetary gear set via engagement of a first and a second of the seven torque-transmitting mechanisms, respectively; and wherein the first, the second, and the third torque-transmitting mechanisms are located axially adjacent one another with none of the planetary gear set members and none of the other torque-transmitting mechanisms therebetween. ### Claim 19 (depends on 18) The multi-speed transmission of claim 18, wherein the second member of the second compound planetary gear set is selectively connected for common rotation with the third member of the second planetary gear set via engagement of a sixth of the seven torque-transmitting mechanisms. ### Claim 20 (depends on 18) The multi-speed transmission of claim 18, wherein the first, the second, the third, the fourth, and the fifth members of the first compound planetary gear set are a first carrier member, a first sun gear member, a second sun gear member, a first ring gear member and a second ring gear member, respectively; wherein the first carrier member rotatably supports a stepped pinion gear having a relatively small diameter portion that meshes with the first ring gear member and the second sun gear member, and having a relatively large diameter portion that meshes with the first sun gear member and the second ring gear member; wherein the first, the second, the third, and the fourth members of the second compound planetary gear set are a second carrier member, a third ring gear member, a third sun gear member, and a fourth ring gear member, respectively; wherein the second carrier member rotatably supports a third and a fourth set of pinion gears; wherein the third set of pinion gears meshes with the third ring gear member and the third sun gear member; and wherein the fourth set of pinion gears meshes the third set of pinion gears and the fourth ring gear member.