Abstract: A gear train of an automatic transmission for a vehicle includes first and second shifting sections and a plurality of friction members, wherein: the first shifting section includes first and second simple planetary gear sets forming a first input path for directly receiving an input shaft rotation speed and an intermediate output path for outputting a reduced speed of the first shifting section; and the second shifting section includes third and fourth simple planetary gear sets forming a first intermediate input path for variably receiving an input shaft rotation speed, a second intermediate input path for receiving the reduced speed of the first shifting section through the intermediate output path and also for variably receiving an input shaft rotation speed, and a final output path for outputting a modified speed of the second shifting section.

Abstract: A power train of an automatic transmission realizing seven forward speeds and three reverse speeds includes an input shaft, a transmission case, a speed reduction unit including an output unit, a first clutch, a second clutch, a second brake, a third brake, and a fourth brake. The output unit generates seven forward speeds and three reverse speeds at the shift speed output member by operations of the first and second variable input members and third and fourth variably stopped members in response to operation of the clutches and brakes.

Abstract: A power train of an automatic transmission realizes nine forward speeds and two reverse speeds. In the power train of this invention, an output unit selectively receives reduced rotation speed from a speed reduction unit or selectively receives rotation speed of an input shaft and generates the nine forward speeds and two reverse speeds by operation of five clutches and three brakes.

Abstract: A transmission includes planetary gearsets, shafts and shifting elements. A carrier of gearset (RS4) and the input shaft couple forming shaft (1). A carrier of gearset (RS3) and the output shaft couple forming shaft (2). A sun gear of gearsets (RS1, RS4) couple forming shaft (3). The carriers of gearsets (RS1, RS2) respectively form shafts (4, 8). A ring gear of gearset (RS2) and a sun gear of gearset (RS3) couple forming shaft (5). A ring gear of gearsets (RS1, RS3) couple forming shaft (6). A sun gear of gearset (RS2) and a ring gear of gearset (RS4) couple forming shaft (7). Element (A) is located in a direction of power flow between shaft (3) and the transmission housing, element (B) between shaft (4) and the housing, element (C) between shafts (1, 5), element (D) between shafts (2, 6) or (6, 8), element (E) between two of shafts (5, 7, 8).

Abstract: A control apparatus for a vehicular drive system including a continuously-variable transmission portion, and a step-variable transmission portion, the continuously variable transmission portion having a differential mechanism operable to distribute an output of an engine to a first electric motor and a power transmitting member, and a second electric motor disposed in a power transmitting path between the power transmitting member and a drive wheel of a vehicle, the step-variable transmission portion constituting a part of the power transmitting path, the control apparatus includes a differential-state limiting device provided in the differential mechanism for limiting an operation of the continuously-variable transmission portion, and an electric-motor control device to control a drive-force assisting operation to drive the vehicle during a shifting action of the step-variable transmission portion, differently depending upon whether the continuously-variable transmission portion is placed in a continuously-v

Abstract: A multistep automatic transmission having an input shaft, an output shaft, three planetary gearsets and five shifting elements. A sun gear of the third planetary gearset is affixed above the first shifting element to a transmission housing. The input shaft is bound to a sun gear of the second planetary gearset and is bound above the second shifting element with a sun gear of the first planetary gearset and/or by way of the fifth shifting element with a link of the first planetary gearset. The output shaft is bound together with the internal gear of the first planetary gearset and one of the links of the second or third planetary gearset. The second planetary gearset is located in the middle of the three planetary gearsets and is placed beside the third planetary gearset. The second and fifth shifting elements are placed between the first and second planetary gearsets.

Abstract: A multi-speed transmission is provided that includes three planetary gear sets and seven torque-transmitting mechanisms with various fixed interconnections to provide seven forward speed ratios and one reverse speed ratio. The first planetary gear set is a dual sun planetary and the torque-transmitting mechanism engagement schedule is designed so that, in the reverse speed ratio, a predetermined speed ratio is achieved at the second sun gear member in the dual sun planetary and the input member, and, in the first forward speed ratio, the same magnitude predetermined speed ratio is achieved between the second sun gear member and the input member, but with the second sun gear member rotating in an opposite direction as in the reverse speed ratio.

Abstract: A vehicular automatic transmission is provided with a reduction planetary gear for reducing and outputting an inputted rotation of an input shaft, first and third clutches for enabling the transmission of a reduced rotation reduced through the reduction planetary gear, a planetary gear unit having second and third sun gears to which the reduced rotation is transmitted by the first and third clutches and a fourth clutch for enabling the transmission of the inputted rotation to the second sun gear. The fourth clutch is linked to the second sun gear of the planetary gear unit via output side members, i.e., a clutch drum and a link member, of the third clutch to commonly use as the output side members. Thereby, the automatic transmission may be compactly built.

Abstract: A transmission with a planetary gearset including planetary gears supported on a carrier, with a disk clutch or brake including a disk carrier which, via an integral cylindrical portion, is fixed to a shaft that supports the disk carrier, such that the carrier rotates on the cylindrical portion and the carrier is supported by a first axial bearing on the disk carrier and a second axial bearing on a sun gear, which engages the planetary gears, and with an oil supply for lubricating and/or cooling bearings, disk clutch and/or brake components. The first axial bearing includes rollers guided in a cage and first check-disk adjacent the carrier and a second check-disk rollers. The first check-disk flanged disk with a section for rollers of the first axial bearing and with a cylindrical section offset from the rolling section.

Abstract: A power train of an automatic transmission that realizes seven forward speeds and two reverse speeds includes a first planetary gear set a second planetary gear set; a third planetary gear set an input shaft; an output gear; and a transmission case. A third planet carrier is fixedly connected to a first ring gear, a second ring gear is fixedly connected to the a planet carrier, a long-pinion-side ring gear acts as an input element by being fixedly connected to the input shaft, and a second planet carrier acts as an output element by being fixedly connected to the output gear. Also, a second ring gear is variably connected to the input shaft via a first clutch, a first sun gear is variably connected to the first planet carrier via a second clutch, the second sun gear is variably connected to the first sun gear via a third clutch, and the short-pinion-side ring gear is variably connected to the transmission case via a first brake.

Abstract: A transmission device (3) for a vehicle with an electric machine (26) that is arranged in a housing (11) is described. The electric machine (26) can be placed in active connection with a rotating component (13, 28) that can be guided in the power flow of the transmission device such that a level of torque that can be generated by the electric machine (26) can be transmitted to the component (13, 28). At least one electric component (45; 45Y) that comprises power electronics for the electric machine (26) is arranged in a cross-sectional area inside the housing (11) that is perpendicular to the longitudinal axis of the electric machine (26) and is located directly adjacent to the electric machine (26).

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, up to five 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 four 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: 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, up to five 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 four 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: An automatic transmission including a mechanical reduction gear connected to an input shaft that generates a decelerated rotation smaller than a rotation of the input shaft from a decelerated rotating member and a compound planetary gear for shifting with a first element, a second element, a third element, a fourth element, and a fifth element.

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 up to five selectable torque-transfer devices, and possibly 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.

Abstract: An automatic transmission having a start-up clutch assembly includes a transmission housing, an input drive shaft, and an output drive shaft. An input planetary gear assembly is also included that has a sun gear and a ring gear, with a plurality of planet gears disposed therebetween, the ring gear operatively connected to the input drive shaft. A start-up clutch is operatively disposed between the transmission housing and the sun gear and is adapted to allow the sun gear to freely rotate when the start-up clutch is disengaged so that no torque is transferred. The start-up clutch is further adapted to engage and hold the sun gear stationary so that torque is fully transferred. The start-up clutch is further still adapted to provide a varying and controllable slipping interaction between the disengaged and engaged positions at vehicle start-up thereby providing the vehicle with a smooth transition from stationary to moving.

Abstract: A power train of a 7-speed transmission for a vehicle is provided which comprises a first, a second, and a third single-pinion planetary gear set on an input shaft. A first ring gear and a second planetary carrier, a second ring gear and a third planetary carrier, a third ring gear and a first planetary carrier are respectively fixedly connected. A first brake selectively connects a first sun gear to a transmission case, a second sun gear is fixedly connected to the input shaft to operate always as an input element, and a third brake selectively connects a third sun gear to the transmission case.

Abstract: A multi-stage automatic transmission comprises a drive input shaft (AN), a drive output shaft (AB), three planetary gearwheel assemblies (RS1, RS2, RS3) arranged next to one another in series and five shift control elements (A to E). A sun gearwheel (SO3) of the third planetary gearwheel assembly (RS3) can be fixed relative to a transmission housing (GG) by the first shift control element (A). The drive input shaft (AN) is connected to a sun gearwheel (SO2) of the second planetary gearwheel assembly (RS2) and can be connected via the second shift control element (B) to a sun gearwheel (SO1) of the first planetary gearwheel assembly (RS1) and/or via the fifth shift control element (E) to a web (ST1) of the first planetary gearwheel assembly (RS1).

Abstract: A drive train (1, 30) for a hybrid vehicle, in which an internal combustion engine (2) is drive-technologically connected to a disengagement clutch (4) whose output side is connected to a transmission input shaft (7), which is connected to an input element (8, 38) of an automatic transmission (17, 36), and in which the transmission input shaft (7) can be driven by an electric machine (5) and itself drives a hydraulic pump (6), which is drive-technologically arranged after the disengagement clutch (4) and before a shiftable starting element (F) of the automatic transmission (17, 36).

Abstract: A multi-stage automatic transmission comprises a drive input shaft (AN), a drive output shaft (AB), three planetary gearwheel assemblies (RS1, RS2, RS3) arranged next to one another in series and five shift control elements (A to E). A sun gearwheel (SO3) of the third planetary gearwheel assembly (RS3) can be fixed relative to a transmission housing (GG) by the first shift control element (A). The drive input shaft (AN) is connected to a sun gearwheel (SO2) of the second planetary gearwheel assembly (RS2) and can be connected via the second shift control element (B) to a sun gearwheel (SO1) of the first planetary gearwheel assembly (RS1) and/or via the fifth shift control element (E) to a web (ST1) of the first planetary gearwheel assembly (RS1).

Abstract: The family of transmissions 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 family members include three planetary gear sets having seven torque-transmitting mechanisms and three interconnecting members. The powertrain includes an engine that is selectively connectable 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, the input shaft and 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 powertrain includes an arrangement of three single planetary gearsets to form six operational elements, among which a first operational element that always operates as an input element. A second operational element selectively operates as an input element and a stationary element. A third operational element selectively operates as an input element. A fourth operational element selectively operates as a stationary element. A fifth operational element always operates as an output element. A sixth operational element selectively operates as a stationary element.

Abstract: A multi-step transmission comprises an input and output shaft arranged in a housing, three spider supported planetary gear sets, seven rotatable shafts; six switch elements; input occurs via a shaft, in connection with the planet carrier of the first planetary gear set, output occurs via a shaft, in connection with the planet carrier of the second planetary gear set and the planet carrier of the third planetary gear set; a shaft is in connection with the sun gear of the first planetary gear set; a shaft is in connection with the ring gear of the second planetary gear set and the ring gear of the third planetary gear set; a shaft is in connection with the sun gear of the third planetary gear set; a shaft is in connection with the ring gear of the first planetary gear set; a shaft is connected to the sun gear of the second planetary gear set.

Abstract: A six-speed powertrain includes a simple planetary gearset having three operational elements and a compound planetary gearset having four operational elements. Regarding the four operational elements of the compound planetary gearset, two of them are variably connected to an input shaft where one of the two is variable connected to a transmission case, another one always acts as an output element, and the other one variably receives torque from the simple planetary gearset at a reduce speed.

Abstract: A multi-stage automatic transmission comprises a drive input shaft (AN), a drive output shaft (AB), three planetary gearwheel assemblies (RS1, RS2, RS3) arranged next to one another in series and five shift control elements (A to E). A sun gearwheel (SO3) of the third planetary gearwheel assembly (RS3) can be fixed relative to a transmission housing (GG) via the first shift control element (A). The drive input shaft (AN) is connected to a sun gearwheel (SO2) of the second planetary gearwheel assembly (RS2) and can be connected via the second shift control element (B) to a sun gearwheel (SO1) of the first planetary gearwheel assembly (RS1) and via the fifth shift control element (E) to a web (ST1) of the first planetary gearwheel assembly (RS1).

Abstract: Multiple gear transmission comprising input and output shafts (1, 2), three planetary sets (P1, P2, P3), six rotatable shafts (1, 2, 3, 4, 5, 6) and six shifting elements (03, 04, 05, 14, 16, 56). Selective engagement of the shifting elements produces seven forward and two reverse gears. The input shaft is connected with the sun gear of the first planetary set (P1), the output shaft with the web of the second planetary set (P2), the third shaft (3) with the sun gears of second and third planetary sets (P2, P3), one shaft (4) connects the web of the first planetary set (P1) with the ring gear of the third planetary set (P3), one shaft (5) is connected with the ring gear of the first planetary set (P1), one shaft (6) connects the web of the third planetary set (P3) with the ring gear of the second planetary set (P2).

Abstract: The family of transmissions 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 family members include three planetary gear sets having seven torque-transmitting mechanisms and two fixed interconnecting members and a grounded member. The powertrain includes an engine that is selectively connectable 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, the input shaft and the transmission housing, and are operated in combinations of three to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: A powertrain incorporates an engine and a multi-speed transmission to provide at least six forward speed ratios and as many as eight forward speed ratios. The transmission incorporates three planetary gearsets and six torque-transmitting mechanisms for six speeds or seven speeds, and seven torque-transmitting mechanisms for eight speeds.

Abstract: A multistage transmission with a drive shaft (3) is connected with a shiftable primary planetary gear set (10), having an output shaft (4), connected with a shiftable principal planetary gear set (20) and being provided with a plurality of shifting elements (A to F), via selective closings of at least six forward gear stages, without group shifting, can be attained. One output element of the primary planetary gear set (10), via a first shifting element (A), can be connected with a first input element of the principal planetary gear set (20) and via a second shifting element (B) can be connected with a second input element of the principal planetary gear set (20). The input drive shaft (3) is, via a fifth shifting element (E), connectable with a third input element of the principal planetary gear set (20).

Abstract: A powertrain includes a power transmission having an input shaft continuously connected directly between an engine and a planetary gear member of a first planetary gearset. Another member of the planetary gearset is selectively grounded by a torque transmitting mechanism to establish a reaction member during the launch of a vehicle incorporating the powertrain. The reaction member is established during both the lowest forward drive ratio and the reverse drive ratio. A third member of the planetary gearset transmits the torque from the input shaft, as modified by the planetary gearset, to other planetary gearsets in down stream power flow arrangement with the first planetary gearset.

Abstract: A multi-stage automatic transmission possesses an input drive shaft (AN), an output drive shaft (AB), three single planetary gear sets (RS1, RS2, RS3) as well as five shifting elements (A to E), by means of the pairwise selective closure of which, an entry speed of rotation of the input drive shaft (AN) can be transmitted to the output drive shaft (AB) without group shifting. A sun gear (SO3) of the third planetary gear set (RS3) can be set motionless by the first shifting element (A) on the transmission housing (GG). The input drive shaft (AN) is bound to a sun gear (SO2) of the second planetary gear set (RS2) and by means of the second shifting element (B) can be connected with a sun gear (SO1) of the first planetary gear set (RS1) and/or by means of the fifth shifting element (E) with a spider (ST1) of the first planetary gear set (RS1).

Abstract: The invention relates to a multi-step gear, comprising a drive shaft (1) linked with a front-mounted gear train (VS), an output shaft (2) linked with a rear-mounted gear train (NS), and maximally seven shift elements (A, B, C, D, E, D?, A?) through the selective shifting of which at least seven forward gears can be shifted without group shifts. The front-mounted gear train (VS) is formed by a front-mounted planetary gear (VS1) or maximally two non-shiftable front-mounted planetary gears (VS2) coupled with the first front-mounted planetary gear (VS1). The rear-mounted gear train (NS) is configured as a two-stage/four-shaft transmission with two shiftable rear-mounted planetary gears (NS1, NS2) and four free shafts. The first free shaft of said two-stage/four-shaft transmission is linked with the first shift element (A), the second free shaft with the second and third shift elements (B, C), the third free shaft with the fourth and fifth shift element (D, E) and the fourth free shaft with the output shaft (2).

Abstract: A multi-stage automatic transmission comprises a drive input shaft (AN), a drive output shaft (AB), three planetary gearwheel assemblies (RS1, RS2, RS3) arranged next to one another in series and five shift control elements (A to E). A sun gearwheel (SO3) of the third planetary gearwheel assembly (RS3) can be fixed relative to a transmission housing (GG) by means of the first shift control element (A). The drive input shaft (AN) is connected to a sun gearwheel (SO2) of the second planetary gearwheel assembly (RS2) and can be connected via the second shift control element (B) to a sun gearwheel (SO1) of the first planetary gearwheel assembly (RS1) and/or via the fifth shift control element (E) to a web (ST1) of the first planetary gearwheel assembly (RS1).

Abstract: A multi-step gear including a drive shaft linked with a non-shiftable front-mounted gear train, an output shaft linked with a shiftable rear-mounted gear train with four free shafts, and shift elements for selective shifting without group shifts. The first free shaft of the rear gear train is linked with a first shift element, the second free shaft with second and third shift elements, the third free shaft with fourth and fifth shift elements and the fourth free shaft with the output shaft. With six shift elements, the first or third free shaft of the rear-mounted gear is additionally linked with a sixth shift element. With seven shift elements, the third free shaft is additionally linked with a sixth shift element and the first free shaft is additionally linked with a seventh shift element.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide six forward speed ratios and a reverse speed ratio. The transmission family members include three planetary gear sets having five torque-transmitting mechanisms, two fixed interconnections, and one grounded planetary gear member. 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 five torque-transmitting mechanisms provide interconnections between various gear members, the fixed interconnections, the input shaft, the output shaft, and the transmission housing, and are operated in combinations of two to establish six forward speed ratios and one reverse speed ratio.

Abstract: The family of transmissions 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 family members include three 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 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 transmission assembly includes a stationary housing and a first section having a coupling member. The first section further includes a first planetary gear assembly, a second planetary gear assembly, and a third planetary gear assembly operatively disposed in the stationary housing. Each of the planetary gear assemblies includes a ring gear, at least one planet carrier having at least one planet gear, and a sun gear. The sun gears of at least the first and second planetary gear assemblies are operatively connected to the coupling member. The first section also includes an input member operatively connected to the third planetary gear assembly to drive the first section. A first stationary clutch operatively connects the coupling member to the stationary housing. A second stationary clutch operatively connects at least one of the planet carrier and the ring gear of the first planetary gear assembly to the stationary housing.

Abstract: A multi-step reduction gear having a drive shaft (1) connected to a front-mounted gear group (VS) having switch elements (A, B, C, D, E) which is connected to a rear-mounted gear group (NS) having switch elements (M, H, L) by a spacer shaft (2) rotating at an output speed (nvs) of the front-mounted gear group (VS). An input speed (n) of the drive shaft (1) can be transmitted to an output shaft (3) for at least seven forward gears wherein a change from one gear to the next highest or next lowest gear only requires a disconnection of one switch element and a connection of one other switch element.

Abstract: A power transmission has three planetary gearsets, which are selectively controlled by five torque-transmitting mechanisms to establish six forward speed ratios and one reverse speed ratio for the transmission. The torque-transmitting mechanisms include piston mechanisms, which are slidably disposed within members of the transmission housing including a front end cover, a rear end cover, and a shell interconnecting the front end cover and the rear end cover.

Abstract: A multiple speed transmission capable of producing five underdrive gear ratios, one direct drive ratio, four overdrive ratios, and four reverse ratios includes four interconnected planetary gearsets, multi-plate clutches and brakes controlling the gearset elements, and a coupler that changes between forward drive and reverse drive by holding and releasing alternate gearset components against rotation on the transmission case. The transmission in combination with a single-speed transfer case having either an on-demand transfer clutch, or a full-time all-wheel drive system, are formed in an integrated package.

Abstract: A power transmission includes three interconnected planetary gearsets and five selectively engageable torque-transmitting mechanisms. The planetary gearsets and torque-transmitting mechanisms are disposed within a transmission housing. The torque-transmitting mechanisms are selectively engageable to provide six forward speed ratios and one reverse speed ratio in the planetary gearsets between an input shaft and an output shaft.

Abstract: A power transmission has three planetary gearsets, which are interconnected and also having at least one member continuously drivingly connected with an input shaft. Two of the planetary gearsets are connected with an output shaft. Five torque-transmitting mechanisms are disposed between two end walls and an outer housing, which define four spaces within the power transmission. The torque-transmitting mechanisms are disposed within two or more of the four spaces or combinations of two of the spaces.

Abstract: A compact longitudinal transmission has an input shaft rotatably supported in a front end wall, an output shaft rotatably supported in a rear end wall, and a housing interconnecting the front end wall and the rear end wall. Three planetary gearsets disposed within the housing are controlled by five torque-transmitting mechanisms including four friction disc or plate mechanisms and one band mechanism. The band mechanism being disposed radially outboard of the rearmost one of the planetary gearsets.

Abstract: A planetary gear assembly comprising a primary array (2) of co-axial planetary gear sets and a secondary array (3) of co-axial planetary gear sets, planetary gear set being provided with an associated gear engagement means (21), the arrangement being such that in use each planetary gear set and the associated gear engagement means are arranged for relative translational movement which is substantially parallel to the axis of the respective array of planetary gears and a rotational input drives a selected primary gear set which is engaged with the associated gear engagement means, the rotational output of the engaged primary gear set (2) being transmitted through the associated gear engagement means (21) to gear engagement means which is engaged with the associated selected secondary gear set (3), the output from the selected secondary gear set being transmitted to rotational output means (18, 49).

Abstract: A powertrain includes a power transmission having an input shaft continuously connected directly between an engine and a planetary gear member of a first planetary gearset. Another member of the planetary gearset is selectively grounded by a torque transmitting mechanism to establish a reaction member during the launch of a vehicle incorporating the powertrain. The reaction member is established during both the lowest forward drive ratio and the reverse drive ratio. A third member of the planetary gearset transmits the torque from the input shaft, as modified by the planetary gearset, to other planetary gearsets in down stream power flow arrangement with the first planetary gearset.

Abstract: A power transmission has a compound input gearset, a Ravigneaux gearset, five friction type torque-transmitting mechanisms, and a one-way type torque-transmitting mechanism selectively engageable to provide at least six forward speed ratios and one reverse speed ratio for the transmission. The input gearset includes a planet carrier, which is stationary within a transmission housing and connected with a stationary portion of the transmission housing. The planet carrier also includes a central support member which provides nonrotatable housings for the apply pistons for three of the friction type torque-transmitting mechanisms.

Abstract: An automatic transmission of a motor vehicle includes first, second and third planetary gear sets, two clutches and three brakes. A first-speed gear stage having the largest gear ratio is established when the first clutch and the first brake are engaged, a second-speed gear stage is established when the first clutch and the second brake are engaged, a third-speed gear stage is established when the first clutch and the third brake are engaged, a fourth-speed gear stage is established when the first clutch and the second clutch are engaged, a fifth-speed gear stage is established when the second clutch and the third brake are engaged, a sixth-speed gear stage is established when the second clutch and the second brake are engaged, and a seventh-speed gear stage is established when the second clutch and the first brake are engaged.

Abstract: A seven-speed planetary transmission incorporates three planetary gearsets and six torque-transmitting mechanisms. Each of the planetary gearsets is a simple type planetary gearset, three of the torque-transmitting mechanisms are rotating type torque-transmitting mechanisms commonly termed clutches, and three of the torque-transmitting mechanisms are stationary type torque-transmitting mechanisms commonly termed brakes. A one-way torque-transmitting mechanism is included to simplify the engagement of the first of the forward speed ratios as well as to simplify the ratio interchange between the first and second of the speed ratios.

Abstract: A dual input planetary transmission has at least two planetary gearsets, two input clutches, five synchronizer clutches, and two brake mechanisms. The planetary gearsets each have one member continuously interconnected with a transmission output shaft and at least one member selectively connectible with a transmission input shaft through the input clutches and at least of two of the synchronizer clutches. The synchronizer clutches also provide selective interconnections of members of one of the planetary gearsets with members of the other of the planetary gearsets. The input clutches are interchanged during a speed ratio interchange and at least one synchronizer clutch is manipulated to preselect the on-coming speed ratio. The input clutches, synchronizer clutches, and brake mechanisms are engaged in various combinations to establish at least six forward speed ratios and one reverse speed ratio.

Abstract: The family of transmissions 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 family members include three planetary gear sets having six torque-transmitting mechanisms and one fixed interconnection. Also, one planetary gear member is continuously connected with the transmission housing. 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 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 one reverse speed ratio.