Abstract: A multi-stage transmission for vehicle may an input shaft, an output shafts, first to fourth planetary gear devices transmitting rotary force between the input and output shafts, each of them having three rotary elements, and at least six shifting elements connected to the rotary elements of the planetary gear devices, wherein first rotary element of the first planetary gear device is permanently connected to the input shaft, second rotary element is installed to be fixable by any one of the shifting elements, and third rotary element is permanently connected to second rotary element of the second planetary gear device.

Abstract: A planetary gear train of an automatic transmission for a vehicle is provided. Ten or more forward speeds and one or more reverse speed are achieved by a planetary gear train of an automatic transmission for a vehicle. The vehicle includes an input shaft, an output shaft, four planetary gear sets respectively having three rotational elements, and six control elements to selectively connect the rotational elements and a transmission housing.

Abstract: A planetary gear train of an automatic transmission may include input shaft, output shaft, first planetary gear set including first to third rotation elements, second planetary gear set including fourth to sixth rotation elements, third planetary gear set including seventh to ninth rotation elements, fourth planetary gear set including tenth to twelfth rotation elements, and six control elements disposed at portions selectively connecting between the rotation elements and between the rotation elements and a transmission housing, wherein the input shaft is directly connected to the fourth rotation element and the eighth rotation element, the output shaft is directly connected to the eleventh rotation element, the tenth rotation element is directly connected to the third rotation element while being selectively connected to the seventh rotation element, the second rotation element is selectively connected to the sixth rotation element, and the first rotation element is directly connected to the transmission hou

Abstract: An automotive multistage transmission may include an input shaft and an output shaft, a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set each including three rotary members and transmitting torque between the input shaft and the output shaft, and at least six shifting members connected to the rotary members of the planetary gear sets.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving power from an engine, an output shaft outputting the power changed in speed, a first planetary gear set, a second planetary gear, a third planetary gear set, a fourth planetary gear set, a first rotating shaft, a second rotating shaft, a third rotating shaft, a fourth rotating shaft selectively connected with the first rotating shaft and simultaneously selectively connected with a transmission housing, a fifth rotating shaft selectively connected with the first rotating shaft and simultaneously directly connected with the input shaft, a sixth rotating shaft selectively connected with the third rotating shaft and simultaneously selectively connected with the transmission housing, a seventh rotating shaft selectively connected with the first rotating shaft, an eighth rotating shaft directly connected with the output shaft, and six friction elements.

Abstract: An automatic transmission (1) includes, in a transmission case (2), an input shaft (3), first to third planetary gear sets (PL1-PL3) of a single pinion type, a fourth planetary gear set (PL4) of a double pinion type, five frictional engagement elements (CL1, CL2, and B1-B3), and outputs (7, 8). The outputs (7, 8) are always engaged with a fourth ring gear (R4).

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft configured to output changed torque of the engine, a first planetary gear set including first, second, and third rotation elements, a second planetary gear set including fourth, fifth, and sixth rotation elements, a third planetary gear set including seventh, eighth, and ninth rotation elements, and a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements.

Abstract: A multi-stage transmission for a vehicle may include an input shaft, an output shaft, a first to fourth planetary gear devices disposed between the input shaft and the output shaft to transmit rotary force, each of the first to fourth planetary gear devices having three rotary elements, and at least six shifting elements connected to the rotary elements of the planetary gear devices, wherein a first rotary element of the first planetary gear device is continuously connected to the input shaft, a second rotary element of the first planetary gear device is installed to be fixable by one shifting element of the at least six shifting elements, and a third rotary element of the first planetary gear device is continuously connected to a second rotary element of the second planetary gear device.

Abstract: An automatic transmission includes nine rotatable shafts and four planetary gear sets, each with a first, second and third element. For the shifting of multiple forward gears and one reverse gear, seven shift elements are provided. The second element of the fourth planetary gear set forms the first shaft designed as a drive shaft, the second element of the third planetary gear set forms the second shaft designed as an output shaft, the first element of the fourth planetary gear set forms the third shaft, one element of the planetary gear set forms the fourth shaft, the third element of the third planetary gear set forms the sixth shaft, the second element of the second planetary gear set forms the eighth shaft. The third element of the second planetary gear set and the first element of the third planetary gear set are connected to each other as the fifth shaft.

Abstract: A transmission includes a drive shaft (1), an output shaft (2), a housing (G), a first planetary gear set (PR1), a second planetary gear set (PR2) and a third planetary gear set (PR3), and six shift elements, including a first brake (B1), a second brake (B2) along with a first clutch (K1), a second clutch (K2), a third clutch (K3, K3?, K3?, K3??) and a fourth clutch (K4, K4?). The shift elements are selectively actuated, by which nine forward gears and one reverse gear can be realized through different transmission ratios between the drive shaft (1) and the output shaft (2). Each planetary gear set (PR1, PR2, PR3) has a sun gear (S1, S2, S3), one planetary gear, one planetary carrier (PT1, PT2, PT3) and one ring gear (H1, H2, H3).

Abstract: A planetary gear train of an automatic transmission may include: an input shaft; an output gear; a first planetary gear set including first sun gear, first planet carrier, and first ring gear; a second planetary gear set including second sun gear, second planet carrier, and second ring gear; a third planetary gear set including third sun gear, third planet carrier, and third ring gear; a fourth planetary gear set including fourth sun gear, fourth planet carrier, and fourth ring gear; a first rotation shaft including the first sun gear; a second rotation shaft including the first planet carrier, the second ring gear, the third planet carrier, and the fourth ring gear; a third rotation shaft including the first and third ring gears; a fourth rotation shaft including the second sun gear and selectively connected to a transmission housing; a fifth rotation shaft including the second planet carrier, selectively connected to the first rotation shaft and to the third rotation shaft, and directly connected to the inp

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft to receive torque of an engine, an output shaft to output changed torque of the engine, a first planetary gear set including first, second, and third rotation elements, a second planetary gear set including fourth, fifth, and sixth rotation elements, a third planetary gear set including seventh, eighth, and ninth rotation elements, and a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft outputting changed torque of the engine, a first planetary gear set including first, second, and third rotation elements, a second planetary gear set including fourth, fifth, and sixth rotation elements, and a third planetary gear set including seventh, eighth, and ninth rotation elements.

Abstract: A system is provided for latching and draining a torque transmitting device. The system may include a clutch feed channel having an inlet portion and a clutch portion. The inlet portion is configured to provide hydraulic fluid from a pressurized source to the clutch portion. The clutch portion is configured to provide hydraulic fluid to a torque transmitting device. An inlet valve connects the inlet portion of the clutch feed channel to the clutch portion of the clutch feed channel. The inlet valve is configured to open to allow the hydraulic fluid to flow from the inlet portion to the clutch portion when the torque transmitting device is engaged. The inlet valve is configured to close and to trap hydraulic fluid within the torque transmitting device when the torque transmitting device is not actively pressurized. A multispeed transmission is also provided.

Abstract: An automatic transmission device for a vehicle includes a first planetary gear mechanism, a second planetary gear mechanism, a third planetary gear mechanism, a fourth planetary gear mechanism, an input shaft, an output shaft, six engaging elements including a first engaging element, a second engaging element, a first clutch, a second clutch, a third clutch and a brake, a first connection member, a second connection member, a third connection member, a fourth connection member, a fifth connection member, a sixth connection member, a seventh connection member, an eighth connection member, and a ninth connection member.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving power of an engine, an output shaft outputting shifted power, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first rotational shaft selectively connected with a transmission housing, a second rotational shaft, a third rotational shaft selectively connected with the transmission housing, a fourth rotational shaft directly connected with the input shaft to be continuously operated as an input element, a fifth rotational shaft selectively connected with the second rotational shaft, a sixth rotational shaft selectively connected with the second rotational shaft, a seventh rotational shaft directly connected with the output shaft to be continuously operated as an output element, an eighth rotational shaft selectively connected with the input shaft and the sixth rotational shaft, and six frictional elements.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft outputting changed torque of the engine, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first rotation shaft selectively connectable to the input shaft, a second rotation shaft directly connected to the input shaft, a third rotation shaft selectively connectable to a transmission housing, a fourth rotation shaft, a fifth rotation shaft selectively connectable to at least one of the second rotation shaft and the third rotation shaft, a sixth rotation shaft selectively connectable to the first rotation shaft, and directly connected to the output shaft, and a seventh rotation shaft selectively connectable to the transmission housing.

Abstract: A multi-stage transmission for a vehicle may include an input shaft and an output shaft, a first planetary gear device, a second planetary gear device, a third planetary gear device, and a fourth planetary gear device provided between the input shaft and the output shaft so as to transfer a torque and each including three rotating elements, and at least six shifting elements connected to the rotating elements of the first to fourth planetary gear devices.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving rotary power of an engine, an output gear outputting the rotary power with rotary speed changed, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first rotating shaft, a second rotating shaft, a third rotating shaft, a fourth rotating shaft selectively connected with the third rotating shaft and a transmission housing simultaneously, a fifth rotating shaft selectively connected with the first rotating shaft and the input shaft simultaneously, a sixth rotating shaft, a seventh rotating shaft selectively connected with the sixth rotating shaft and the transmission housing simultaneously, an eighth rotating shaft selectively connected with the sixth rotating shaft and the output gear simultaneously, and six friction elements.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft into which power of an engine is input, an output shaft that outputs shifted power, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first rotational shaft selectively connected to a transmission housing, a second rotational shaft directly connected to the input shaft, a third rotational shaft selectively connected to the transmission housing, a fourth rotational shaft selectively connected to the first rotational shaft and the second rotational shaft, a fifth rotational shaft, a sixth rotational shaft selectively connected to the first rotational shaft, a seventh rotational shaft directly connected to the output shaft, and selectively connected to the fifth rotational shaft, an eighth rotational shaft, and six friction elements.

Abstract: A planetary gear train of an automatic transmission for a vehicle is provided. The planetary gear train includes an input shaft that receives an engine torque, an output shaft that outputs a shifted torque, and planetary gear sets. Additionally, shafts are connected with respective rotational elements. The planetary gear train thus improves power delivery performance and reduces fuel consumption by achieving nine forward speed stages using a minimum number of constituent elements.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft configured to output changed torque of the engine, a first planetary gear set including first, second, and third rotation elements, a second planetary gear set including fourth, fifth, and sixth rotation elements, a third planetary gear set including seventh, eighth, and ninth rotation elements, and a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements.

Abstract: A multiple speed power transmission including: an input shaft, an output shaft, a first gearing assembly imposing a fixed linear speed relationship among five shafts, a second gearing assembly imposing a fixed linear speed relationship among three shafts, two clutches, and four brakes capable of producing nine forward speed ratios and one reverse speed ratio when clutches and brakes are applied in combinations of two.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft outputting changed torque, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first rotation shaft selectively connected to a transmission housing, a second rotation shaft, a third rotation shaft selectively connected to the transmission housing, a fourth rotation shaft directly connected to the input shaft, a fifth rotation shaft, a sixth rotation shaft selectively connected to the second rotation shaft or the fifth rotation shaft, a seventh rotation shaft selectively connected to the input shaft, and an eighth rotation shaft directly connected to the output shaft, and selectively connected to the sixth rotation shaft.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft outputting changed torque, a first planetary gear set, a second planetary gear set, a third planetary gear set including, a fourth planetary gear set, a first rotation shaft, a second rotation shaft selectively connected to a transmission housing, a third rotation shaft selectively connected to the transmission housing, a fourth rotation shaft selectively connected to the second shaft or the third shaft, a fifth rotation shaft directly connected to the input shaft, a sixth rotation shaft, a seventh rotation shaft selectively connected to the transmission housing, and an eighth rotation shaft selectively connected to the sixth rotation shaft, and directly connected to the output shaft.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft outputting changed torque, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first rotation shaft, a second rotation shaft directly connected to the input shaft, a third rotation shaft, a fourth rotation shaft selectively connected to the first rotation shaft or the second rotation shaft, a fifth rotation shaft selectively connected to a transmission housing, a sixth rotation shaft selectively connected to the transmission housing, a seventh rotation shaft selectively connected to the first rotation shaft, and an eighth rotation shaft directly connected to the output shaft, and selectively connected to the first rotation shaft.

Abstract: A power-shiftable multi-stage transmission in planetary design, between a drive shaft and an output shaft, in particular an automatic transmission for a vehicle. The multi-stage transmission has two parallel shaft sections, six shift elements, at least two spur-gear stages and three planetary gear sets, each of which has one sun gear, one ring gear, and one planet carrier having a plurality of planetary gears. The planet carrier is united in a carrier, and the two shaft sections can be connected to one another via the at least two spur-gear stages. Different transmission ratios between the drive shaft and the output shaft can be implemented by selective engagement of the six shift elements such that a plurality of forward gears, in particular nine forward gears, and at least one reverse gear, can be implemented.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft outputting changed torque, a first planetary gear set including first, second, and third rotation elements, a second planetary gear set including fourth, fifth, and sixth rotation elements, a compound planetary gear set formed by combining third and fourth planetary gear sets and including seventh, eighth, ninth, and tenth rotation elements, a fifth planetary gear set including eleventh, twelfth, and thirteenth rotation elements, and six friction elements disposed between at least one rotation element among thirteen rotation elements and another rotation element or the input shaft, or between at least one rotation element among the thirteen rotation elements and a transmission housing.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft outputting changed torque, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first rotation shaft, a second rotation shaft directly connected to the output shaft, a third rotation shaft selectively connected to a transmission housing, a fourth rotation shaft selectively connected to the first rotation shaft, a fifth rotation shaft selectively connected to the first rotation shaft, a sixth rotation shaft, a seventh rotation shaft directly connected to the input shaft, and an eighth rotation shaft selectively connected to the first rotation shaft, the sixth rotation shaft, or the transmission housing.

Abstract: A multi-ratio transmission with nine forward and one reverse gear. Sun gears of first and third gearsets (P1, P3) are couplable, via brake (04), a housing. Carrier of third gearset (P3) and sun gear of second gearset (P2) are couplable, via clutch (13), to input shaft or coupled, via brake (03), housing. Input shaft detachably couples, via clutch (16), ring gear of third gearset (P3), and, via clutch (18), carrier of second gearset (P2) and detachably couples, via clutch (78), ring gear of fourth gearset (P4). Ring gear of second gearset (P2) and carrier of first gearset (P2, P1) are connected to one another. Output shaft couples carrier and ring gear of the fourth and first gearsets (P4, P1) to one another. The sun gear of fourth gearset (P4) is coupled to the housing.

Abstract: A family of transmission gearing arrangements provides ten forward speed ratios and one reverse speed ratios by selective engagement of shift elements in various combinations. Four simple planetary gear sets are provided, each having a sun gear, a planet carrier, and a ring gear. One carrier is coupled to the input. At least one planetary gear set provides an underdrive speed relationship between a shaft extending from the carriers of that gear set and the output. At least two brakes and four clutches provide selective coupling between other shafts in the transmission.

Abstract: A transmission includes a transmission mechanism. The transmission mechanism includes a planetary gear mechanism and a fixing element. A ring gear is provided with a first gear meshing with an output gear on an output member and a second gear meshing with a plurality of pinion gears. The output gear and the first gear include helical gears meshing with each other. The second gear and the plurality of pinion gears include helical gears meshing with each other. Helix angles of the output gear and the first gear and helix angles of the second gear and the plurality of pinion gears are set so that a thrust force generated in a case where the output gear and the first gear rotate and a thrust force generated in a case where the second gear and the plurality of pinion gears rotate are directed towards each other.

Abstract: An automatic transmission that shifts power applied to an input member and outputs the shifted power to an output member, the automatic transmission including a first planetary gear mechanism, a third planetary gear mechanism, a compound planetary gear mechanism, a first clutch, a second clutch, a third clutch, a fourth clutch a first brake, and a second brake.

Abstract: The present disclosure relates to a multi-stage transmission for a vehicle that includes four planetary gear devices and six shifting elements, and each of the planetary gear devices include three rotary elements selectively connected to the six shifting elements, preferably so that the multi-stage transmission provides at least ten forward shifting stages and at least one reverse shifting stage with a relatively small number of parts and a simple configuration. In this configuration, an engine may be operated at desired operation points, to improve the fuel efficiency of the vehicle and improve the quietness of the vehicle.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft outputting changed torque, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first rotation shaft, a second rotation shaft directly connected to the input shaft, a third rotation shaft, a fourth rotation shaft selectively connected to the first rotation shaft or the second rotation shaft, a fifth rotation shaft selectively connected to a transmission housing, a sixth rotation shaft selectively connected to the transmission housing, a seventh rotation shaft selectively connected to the first rotation shaft, and an eighth rotation shaft directly connected to the output shaft, and selectively connected to the first rotation shaft.

Abstract: A multi-stage transmission for a vehicle may include an input shaft, an output shaft, first to fourth planetary gear devices disposed between the input shaft and the output shaft to transmit rotary force, each of the first to fourth planetary gear devices having three rotary elements, and at least six shifting elements connected to the rotary elements of the planetary gear devices.

Abstract: A control for a multi-speed automatic vehicle transmission is provided. Electrical and hydraulic components are provided, including pressure control or “trim” valve systems in fluid communication with shift valves and electrohydraulic actuators to selectively engage and disengage the transmission clutches or other shift mechanisms. Pressure switches are provided for the trim valves and shift valves. The fluid connections between the trim valve systems and the shift valve systems are configured to reduce the total number of valves and fluid passages required and to reduce the size of at least one of the valves. Clutch blocking features are provided. Power off limp home and reduced engine load at stop features are provided in all forward ranges, and control of double transition shifts is also provided.

Abstract: An automated manual transmission includes an input shaft for receiving a rotational force from a power source, a first output shaft and a second output shaft arranged parallel to the input shaft and draw out power, a first planetary gear device and a second planetary gear device arranged on the input shaft, a plurality of driving gears arranged on the input shaft to receive power through the first planetary gear device or the second planetary gear device, a plurality of driven gears arranged on the first output shaft or the second output shaft so as to form different shift stages, respectively, by meshing with the plurality of driving gears, a first brake provided for converting a state of coupling one rotational element of the first planetary gear device, and a second brake provided for converting a state of coupling one rotational element of the second planetary gear device.

Abstract: A hybrid transmission for a motor vehicle including a heat engine and electric drive machine, including two primary shafts respectively connected to the heat engine and electric machine, each supporting at least one intermediate drive on a first secondary shaft connected to wheels via a differential and a second secondary shaft sending motion of a primary shaft to the differential. A first coupling between the two primary shafts can occupy at least three positions of: the heat engine is uncoupled from the drive train connecting the electric machine to the wheels, or coupled by the second secondary shaft; the primary shaft connected to the heat engine is coupled to the first secondary shaft to drive the wheels with or without support of the electric machine; the primary shaft connected to the heat engine is coupled to the primary shaft connected to the electric machine, to add respective torques thereof.

Abstract: A multi-stage transmission having eight forward and one reverse gear includes planetary gearsets, shafts and shift elements. The sun gear of gearset (P1) couples shaft (3), which can couple, via brake (03), the housing and couples the ring gear of gearset (P3). The input shaft couples the carrier of gearset (P1) and can couple, via clutch (15), shaft (5), which couples the ring and sun gears of respective gearsets (P2, P3). The ring gear of gearset (P1) couples shaft (6) and the sun gear of gearset (P2). Shaft (8) couples the carrier and sun gear of respective gearsets (P3, P4). Shaft (4) couples the carrier of gearset (P4) and can couple, via brake (04), the housing. The input shaft couples the ring gear of gearset (P4) and, via clutch (27), couples shaft (7), which couples the carrier of gearset (P2). Clutch (56, 67, 57) engages to block gearset (P2).

Abstract: A power transmission system of a hybrid electric vehicle includes an input shaft a first planetary gear set disposed on the input shaft while having a first sun gear, a first planetary carrier, and a first ring gear, a second planetary gear set having a second sun gear, a second planetary carrier, and a second ring gear, a third planetary gear set having a third sun gear, a third planetary carrier, and a third ring gear, first to sixth rotation shafts and three friction elements selectively connect the respective rotation shafts to each other or selectively connect the respective rotation shafts to the transmission housing.

Abstract: Transmission comprising four planetary gear sets, shafts and six shift elements. Sun of first set is connected to fifth shaft, which is connected to sun of second set and is couplable to housing by second brake. Driveshaft is connectable by first clutch to fourth shaft connected to carrier of second set and is couplable by first brake to housing. Driveshaft is connectable by second clutch to seventh shaft connected to ring gear of second set and sun of third set, and is connectable by third clutch to eighth shaft connected to carrier of third set. Eighth shaft is connectable by fourth clutch to third shaft connected to ring gear of fourth set. Sixth shaft is connected to ring gear of third set and carrier of first set. Sun of fourth set is coupled to housing. Output shaft is connected to carrier of fourth set and ring gear of first set.

Abstract: A gear train may include an input shaft adapted to receive torque of an engine, an output shaft adapted to output changed torque, a first planetary gear set including a first sun gear, a first planet carrier, and a first ring gear as rotation elements thereof, a second planetary gear set including a second sun gear, a second planet carrier, and a second ring gear as rotation elements thereof, and a third planetary gear set including a third sun gear, a third planet carrier, and a third ring gear as rotation elements thereof.

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 each selectively engageable in combinations of at least three to establish a plurality of forward speed ratios and at least one reverse speed ratio.

Abstract: A transmission is provided having an input member, an output member, at least three planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. The torque transmitting devices include clutches and brakes actuatable in combinations of three to establish a plurality of forward gear ratios and at least one reverse gear ratio.

Abstract: A transmission having input and output shafts, shifting elements and planetary gearsets including sun and ring gears, planetary gearwheels and a carrier. The carrier of the first gearset is fixed to the input. The ring gear of the second gearset can be connected by a first shifting element to the housing and by a second shifting element to the carrier of the second gearset. The ring gear of the first gearset is fixed to the sun gear of the second gearset. The sun gear of the first gearset can be connected by a third shifting element to the housing, or is fixed to the sun gear of the second gearset and the ring gear of the first gearset can be connected by a third shifting element fixed to the housing. The shifting elements are arranged within the housing and accessible from outside the housing.

Abstract: A transmission has four planetary gear sets, four interconnecting members and six torque-transmitting mechanisms selectively engageable in different combinations of four to establish ten forward speed ratios. One of the six torque-transmitting mechanisms is a mechanical on-off clutch that engages to prevent rotation of a first member of a first of the planetary gear sets rotates in a first direction, and freewheels when the first member rotates in an opposing second direction. When engaged, the first member is grounded to a stationary member.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft outputting changed torque, a first planetary gear set including a first sun gear, a first planet carrier, and a first ring gear, a second planetary gear set including a second sun gear, a second planet carrier, and a second ring gear, a third planetary gear set including a third sun gear, a third planet carrier, and a third ring gear, a fourth planetary gear set including a fourth sun gear, a fourth planet carrier, and a fourth ring gear, a first rotation shaft, a second rotation shaft, a third rotation shaft, a fourth rotation shaft, a fifth rotation shaft, a sixth rotation shaft, a seventh rotation shaft, and an eighth rotation shaft.

Abstract: A planetary gear train of an auto transmission for a vehicle may include an input shaft, four planetary gear sets, eight rotational shafts and six friction elements. The rotational shafts connect rotation elements of corresponding first, second, third, and/or fourth planetary gear sets, and one or more rotational shafts are directly or selectively connected to an output shaft or a transmission housing. The six friction elements selectively connect the rotational shafts and selectively connect one or more rotational shafts with the transmission housing.

Abstract: The first planetary gear set is configured to integrally rotate by a first clutch. The first element is coupled with the fifth element. The second element is configured to be locked through a first brake to a stationary section and configured to be coupled through a second clutch with the ninth element. The third element is coupled with the input shaft. The fourth element is configured to be coupled through a third clutch with the ninth element. The sixth element is locked to the stationary section. The seventh element is configured to be locked through a second brake to the stationary section. The eighth element is coupled with an output shaft. The ninth element is coupled with the twelfth element. The tenth element is configured to be coupled through a fourth clutch with the output shaft. The eleventh element is coupled with the input shaft.