Abstract: An automatic transmission is provided having an input member, an output member, four 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 be either clutches or brakes.

Abstract: A transmission is provided having an input member, an output member, four 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 are clutches and a brake.

Abstract: A transmission of the present invention has an input member, an output member, four 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. The torque transmitting devices are selectively engageable in combinations of at least three to establish at least ten forward speed ratios and at least one reverse speed ratio.

Abstract: An automatic transmission is provided having an input member, an output member, four 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 be either clutches or brakes.

Abstract: An output side transfer member 103 of a second clutch C-2 extends around the outer circumferences of the output side transfer members 101, 102 of the third and first clutches C-3, C-1, the output side transfer member 104 (or 13, 101) of a fourth clutch C-4 and the output side transfer member 101 of a third clutch C-3 are linked to a sun gear S2, the output side transfer member 104 (or 13, 101) of a fourth clutch C-4, an output side transfer member 101 of a third clutch C-3, and a sun gear S2, which rotate integrally, are disposed radially inward with respect to the output side transfer member 102 of the first clutch C-1. Thereby, it becomes possible to reduce the diameter of the output side transfer member 104 (or 13, 101) of the fourth clutch C-4, to reduce the weight and inertia, and to improve the controllability of the automatic transmission 1.

Abstract: An automatic transmission includes a first planetary gear set; a second planetary gear set; a third planetary gear set; an input shaft; an output shaft; and five friction elements. A first ring gear is constantly locked. A third sun gear is connected with a first sun gear to define a first rotating member, and a second sun gear is connected with a first carrier to define a second rotating member. The input shaft is constantly connected with the first rotating member, and the output shaft is constantly connected with a third carrier.

Abstract: A transmission is provided having an input member, an output member, four 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 at least one brake.

Abstract: A transmission is provided having an input member, an output member, four 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 a brake.

Abstract: A sun gear of a first planetary gear train is connected to an input shaft. A carrier 9 of the first planetary gear train is connected to a sun gear of a second planetary gear train and to a first pump/motor. A ring gear of the first planetary gear train is connected to a second pump/motor, and a ring gear of the second planetary gear train is connected to an output shaft. A first clutch is provided for engaging and disengaging a carrier of the second planetary gear train and the ring gear of the first planetary gear train with and from each other, and a second clutch is provided for engaging and disengaging the carrier of the second planetary gear train and a fixed end with and from each other.

Abstract: An output side transfer member 103 of a second clutch C-2 extends around the outer circumferences of the output side transfer members 101, 102 of the third and first clutches C-3, C-1, the output side transfer member 104 (or 13, 101) of a fourth clutch C-4 and the output side transfer member 101 of a third clutch C-3 are linked to a sun gear S2, the output side transfer member 104 (or 13, 101) of a fourth clutch C-4, an output side transfer member 101 of a third clutch C-3, and a sun gear S2, which rotate integrally, are disposed radially inward with respect to the output side transfer member 102 of the first clutch C-1. Thereby, it becomes possible to reduce the diameter of the output side transfer member 104 (or 13, 101) of the fourth clutch C-4, to reduce the weight and inertia, and to improve the controllability of the automatic transmission 1.

Abstract: A transmission is provided with a reverse input split mode and, preferably, a reverse low fixed speed ratio which provides sufficient reverse grade performance while allowing motor size and planetary and transmission ratios to be optimized for fuel economy or other design criteria. Engine-on reverse performance is improved, reducing dependence on the battery and electric motors to meet reverse grade performance requirements.

Abstract: The transmission has a plurality of members that can be utilized in a powertrain to provide nine forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets having six torque-transmitting devices and five fixed interconnections. The powertrain includes an engine and torque converter that are continuously connected to at least one of the planetary gear members, and an output member that is continuously connected with another one of the planetary gear members. The six torque-transmitting devices provide interconnections between various gear members, the transmission housing and the input member, and are operated in combinations of two to establish at least nine forward speed ratios and at least one reverse speed ratio.

Abstract: A transmission is provided having an input member, an output member, four 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 a brake.

Abstract: A transmission is provided having an input member, an output member, four 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.

Abstract: The present invention provides an eight speed automatic transmission for motor vehicles having three planetary gear sets, four friction clutches, a friction brake, a band brake and an optional overrunning clutch. The eight speed transmission according to the present invention exhibits good gear ratio progression and high efficiency due to its excellent gear mesh efficiency, low spin losses and low pinion speeds.

Abstract: An automatic transmission is provided having an input member, an output member, four 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 be either clutches or brakes.

Abstract: A power train of an automatic transmission includes an input shaft connected to a torque converter; an output gear; a transmission case; a first planetary gear set including a first operating member fixedly connected to the input shaft, a second operating member fixedly connected to the transmission case, and a third operating member; a second planetary gear set including a fourth operating member selectively connected to the third operating member, a fifth operating member selectively connected to the input shaft, second or third operating members, a sixth operating member selectively connected to the input shaft or transmission case, a seventh operating member selectively connected to the transmission case, and an eighth operating member acting as an output element, wherein the second planetary gear set outputs ten forward speeds and two reverse speeds; and a plurality of friction members selectively connecting the operating members, input shaft, or transmission case.

Abstract: A drive system includes a planetary gear system. An input is affixed to a sun gear of the planetary gear system to rotate therewith and an output is affixed to the output ring gear to rotate therewith. A first brake system is selectively operable to rotationally lock an output ring gear of the planetary gear system, and a second brake system is selectively operable to rotationally lock the planet carrier of the planetary gear system. Rotary-wing aircraft implementations of the drive system are also disclosed.

Abstract: A multi-speed transmission has four planetary gear sets and five torque-transmitting mechanisms packaged in at least one of six possible zones within the transmission casing.

Abstract: An output side transfer member 103 of a second clutch C-2 extends around the outer circumferences of the output side transfer members 101, 102 of the third and first clutches C-3, C-1, the output side transfer member 104 (or 13, 101) of a fourth clutch C-4 and the output side transfer member 101 of a third clutch C-3 are linked to a sun gear S2, the output side transfer member 104 (or 13, 101) of a fourth clutch C-4, an output side transfer member 101 of a third clutch C-3, and a sun gear S2, which rotate integrally, are disposed radially inward with respect to the output side transfer member 102 of the first clutch C-1. Thereby, it becomes possible to reduce the diameter of the output side transfer member 104 (or 13, 101) of the fourth clutch C-4, to reduce the weight and inertia, and to improve the controllability of the automatic transmission 1.

Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide eight forward speed ratios and one reverse speed ratio. The transmission includes three planetary gear sets, six torque-transmitting devices, one fixed interconnection and a grounded member. The powertrain includes an engine and torque converter that is continuously connected to one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The six torque-transmitting devices provide interconnections between various gear members, and the transmission housing, and are operated in combinations of three to establish eight forward speed ratios and one reverse speed ratio.

Abstract: A transmission of the present invention has an input member, an output member, four 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. The torque transmitting devices are selectively engageable in combinations of at least three to establish at least ten forward speed ratios and at least one reverse speed ratio.

Abstract: There is provided an automatic transmission comprising a first shaft capable of receiving torque from an engine, and four planetary gear sets arranged coaxially on the first shaft and in series in an axial direction of the first shaft. Each of the four planetary gear sets has a single sun gear and a single ring gear. Further, the automatic transmission comprises an output wheel arranged coaxially on the first shaft, and capable of outputting torque transmitted from the engine through some of the four planetary gear sets. The output wheel is arranged between two of the four planetary gear sets. Accordingly, the noise or vibration from the planetary gear sets in the automatic transmission may be reduced, while the overall length of the first shaft may be made shorter, and the overall size of the automatic transmission may be made smaller.

Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide eight forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets, five torque-transmitting devices, two grounded members and three fixed interconnections. The powertrain includes an engine and torque converter that is continuously connected to one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The five torque-transmitting devices provide interconnections between various gear members, and the transmission housing, and are operated in combinations of two to establish eight forward speed ratios and one reverse speed ratio.

Abstract: A transmission is provided having an input member, an output member, four 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.

Abstract: An eight speed automatic 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 three clutches and three brakes.

Abstract: An electrically-variable transmission is provided with first and second motor/generators and three planetary gear sets. The planetary gear sets have continuous interconnections, and selective connections via a plurality of torque-transmitting mechanisms, that provide three forward electrically-variable modes. Preferably, the planetary gear sets are characterized by effective gear ratios such that a substantially equal maximum torque is required from each of the motor/generators during the three forward electrically-variable modes for a given torque on the input member. This allows the first and second motor/generators to be substantially equal in size.

Abstract: A dual clutch planetary transmission (1) having at least four planetary gear sets (P1 to P4), at least two frictional shifting elements (K1, K2) for the shifting into different power paths in a power flow, and a plurality of shape-fit, shifting elements (A, B1, B2, D, E1, E2, F) for the attainment of various ratio stages for the power paths. The frictional shifting elements (K1, K2) and the shape-fit, shifting elements (A, B1, B2, D, E1, E2, F) are so positioned between shafts (S1, ST1, HR1, S2, ST2, HR2, S3, ST3, HR3, S4, ST4, HR4) of the planetary gear sets (P1 to P4), a housing (2), a transmission input shaft (3) and a transmission output shaft (4) that gear stage change, at least in a lower gear range (1 to 6), can be accomplished free of interruption in traction. At least one of the frictional shifting elements (K1, K2) is a clutch.

Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets having seven torque-transmitting mechanisms, four fixed interconnections, and a stationary (grounded) member. The powertrain includes an engine and torque converter that is selectively connected to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members and with the transmission housing, and are operated in combinations of two to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: A multi-speed transmission with forward and reverse gears having input and output shafts, planetary gearsets, rotatable shafts and control elements. The input shaft can be detachably connected to shaft (6) by clutch (16); clutch (13) to shaft (3), and clutch (14) to shaft (4). The shaft (6) is permanently connected to the sun gear of the second planetary gearset and the sun gear of the third planetary gearset. Shaft (3) is permanently connected to the carrier of the second planetary gearset and the ring gear of the third planetary gearset; coupled to the housing via brake (03). Shaft (4) is permanently connected to the sun gear of the first planetary gearset and can be coupled to the housing via the brake (04).

Abstract: A vehicular automatic transmission including a first planetary gear device and a first set of frictional coupling elements, which can be supported by a pump housing via first and second retainer rings, at predetermined axial positions within the pump housing, during assembling of the automatic transmission. The first retainer ring is fixed to a radially inner spline-fitting part of a cylindrical extending portion of the pump housing, while the second retainer ring is fitted in a first circumferential groove formed in a ring gear of the first planetary gear device and a second circumferential groove formed in the inner circumferential surface of a splined cylindrical portion of a first hub splined to the outer circumferential surface of the ring gear and the radially inner portions of the first set of frictional coupling elements. The automatic transmission is manufactured by assembling a subassembly with respect to a stationary cylindrical housing to which the pump housing is fixed.

Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets having seven torque-transmitting mechanisms and three fixed interconnections. The powertrain includes an engine and torque converter that is continuously connected to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members and with the transmission housing, and are operated in combinations of two to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including three or four differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, seven or eight selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and up to six mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.

Abstract: A transmission is provided having an input member, an output member, four 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 a brake.

Abstract: An automatic transmission having first and second groups of successive forward-drive positions for outputting a rotary motion a speed of which is higher than the speed of a rotary motion received from an input member, the first group being established by an engaging action of a first input clutch while the second group being established by an engaging action of a second input clutch, or first and second groups of successive forward-drive positions for reducing the speed of the rotary motion received from the input member, the first and second groups being established by an engaging action of a first and second input clutches respectively. The successive operating positions of the first group have respective speed ratios different from those of the second group. The automatic transmission is shiftable to a selected one of the successive operating positions of a selected one of the first and second groups.

Abstract: The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, three electric machines serving interchangeably as motors or generators and up to three brakes. The three motor/generators are operable in a coordinated fashion to yield an EVT with a continuously variable range of speeds (including reverse). One of the brakes enables series hybrid operation.

Abstract: A transmission is provided having an input member, an output member, four 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.

Abstract: A power train of an automatic transmission attains eight forward speeds and one reverse speed. The power train includes first, second, and third planetary gear sets, four clutches, and two brakes. The first planetary gear set generates a reduced rotational speed, the second planetary gear set generates a reverse rotational speed, and the third planetary gear set generates the eight forward speeds and the one reverse speed by using the reduced rotational speed, the reverse rotational speed, and a rotational speed of an input shaft.

Abstract: A multi-speed transmission has three planetary gear sets and six torque-transmitting mechanism packaged in various ones of five zones within a transmission cavity. Each planetary gear set has a ring gear member, a sun gear member and a carrier member that rotatably supports a plurality of pinion gears that intermesh with both the sun gear member and the ring gear member. Certain members are continuously connected for common rotation. Specifically, an interconnecting member continuously interconnects for common rotation the carrier member of the first planetary gear set, the sun gear member of the second planetary gear set and the ring gear member of the third planetary gear set. Additionally, the sun gear member of the first planetary gear set is grounded to the transmission casing via a radially-extending structural member.

Abstract: A multi-speed transmission includes multiple planetary gear sets having members representable by a three-node lever and a five-node lever, with each node representing at least one of the members of the planetary gear sets. The transmission includes seven torque-transmitting mechanisms including three rotating clutches selectively connecting nodes of the three-node lever to nodes of the five-node lever, one rotating clutch selectively connecting the input member with a node of the five-node lever and three brakes grounding selective nodes of the five-node lever to a stationary member. The torque-transmitting mechanisms are engagable in different combinations to provide at least eight forward speed ratios and a reverse speed ratio between an input member and an output member, and there are preferably five alternate forward speed ratios such that there are five different combinations of nine forward speed ratios operable in progression with single-transition shifts between each forward speed ratio.

Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets having seven torque-transmitting mechanisms and three fixed interconnections. The powertrain includes an engine and torque converter that is continuously connected to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members and with the transmission housing, and are operated in combinations of two to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least six forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having up to seven torque-transmitting mechanisms and two interconnecting members. The powertrain includes an engine that is selectively or continuously connectable to at least one of the planetary gear members and an output shaft that is continuously connected with another one of the planetary gear members. The torque-transmitting mechanisms provide interconnections between various gear members, the input shaft and the transmission housing, and are operated in combinations to establish at least six forward speed ratios and at least one reverse speed ratio.

Abstract: A multi-stage automatic transmission for a motor vehicle with standard drive has one overdrive front-mounted gearset (VS) which is connected with one input shaft (AN), a multi-member main gearset connected with one output shaft (AB) and connectable with one output element of the front-mounted gearset (VA), the same as six shifting elements (A, B, C, D, E, F) by the selective paired closing of which preferably eight forward gears can be engaged without range shifting. The main gearset comprises three rear-mounted gearsets (NS1, NS2, NS3) whose three sun gears (SO_NS1, SO_NS2, SO_NS3) are interconnected and can be connected with the output element of the front-mounted gearset (VS) and with the input shaft (AN). One web (ST_NS1) of the first rear-mounted gearset (NS1) is fixable and connectable with the input shaft (AN).

Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide at least seven forward speed ratios and one reverse speed ratio. The transmission includes three planetary gear sets having seven torque-transmitting mechanisms and two fixed interconnections. The powertrain includes an engine and torque converter that is continuously connected to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members and with the transmission housing, and are operated in combinations of three to establish at least seven forward speed ratios and at least one reverse speed ratio.

Abstract: A planetary gear mechanism that follows or precedes a transmission, and consists of a housing, a sun wheel, at least two planet wheels, a planet arm, and a gear ring. There is a locking device for the housing, the gear ring, and a power take-off, and a locking device for the housing, the planet arm, and the power take-off.

Abstract: A transmission can be provided which achieves multiple speeds while maintaining good balance of gear ratio steps between gears by having a first clutch which selectively connects a first intermediate output member and a fourth rotating element RE4 together, a second clutch which selectively connects an input shaft and a second rotating element RE2 together, a third clutch which selectively connects the first intermediate output member and a first rotating element RE1 together, a fourth clutch which selectively connects the input shaft and the first rotating element RE1 together, a fifth clutch which selectively connects a second intermediate output member and the first rotating element RE1 together, a first brake which selectively holds the first rotating element RE1 to a transmission case, and a second brake which selectively holds the second rotating element RE2 to the transmission case.

Abstract: A transmission is provided having a planetary gearset having respective first, second, and third members, and a compound gearset having respective first, second, third, fourth, and fifth members. The transmission also includes a plurality of selectively engageable torque transmitting devices configured to selectively interconnect selected members of the planetary gearset and the compound gearset for unitary rotation thereby to provide a plurality of forward speed ratios and at least one reverse speed ratio between an input member and an output member.

Abstract: A multi-speed transmission has three planetary gear sets and six torque-transmitting mechanism packaged in various ones of five zones within a transmission cavity. Each planetary gear set has a ring gear member, a sun gear member and a carrier member that rotatably supports a plurality of pinion gears that intermesh with both the sun gear member and the ring gear member. Certain members are continuously connected for common rotation. Specifically, an interconnecting member continuously interconnects for common rotation the carrier member of the first planetary gear set, the sun gear member of the second planetary gear set and the ring gear member of the third planetary gear set. Additionally, the sun gear member of the first planetary gear set is grounded to the transmission casing via a radially-extending structural member.

Abstract: The electrically variable transmission (EVT) family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, three electric machines serving interchangeably as motors or generators and at least one brake. The three motor/generators are operable in a coordinated fashion to yield an EVT with a continuously variable range of speeds (including reverse). One of the brakes enables series hybrid operation.

Abstract: The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and six selectable torque-transfer devices, which may include a dog clutch. The selectable torque transfer devices are engaged singly or combinations of two to yield an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.