Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least ten forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and seven selective couplers. The seven selective couplers may include three clutches and four brakes.

Abstract: An automatic transmission has a one-side clutch and an other-side clutch in an axial direction, the one-side clutch and the other-side clutch being aligned in the axial direction on an axis of a power transmission shaft. These clutches respectively include: drum sections; hub sections; friction plates that are engaged in an axially slidable manner between the drum sections and the hub sections; and pistons that press the friction plates. The friction plates in the one-side and other-side clutches are arranged in parallel in the axial direction. The pistons in the one-side clutch and the other-side clutch are arranged on one sides in the axial direction of the friction plates and are arranged such that axial positions thereof overlap. The piston in the other-side clutch penetrates the friction plate in the one-side clutch in the axial direction.

Abstract: An automatic transmission having three planetary rows, which includes an input element and an output element. The input element is fixedly connected to the second sun gear, the output element is fixedly connected to the third planetary carrier, the second planetary carrier is fixedly connected to the third gear ring, the first gear ring is fixedly connected to the third planetary carrier. When the brake is engaged, the elements connected with the brake are braked accordingly. The first rear sun gear is connected to the input element, the second planetary carrier is connected to the third gear ring, and the second clutch is selectively engaged to connect with any two of the second sun gear, the second gear ring and the second planetary carrier, so as to make the second planetary row rotate overall.

Abstract: A transmission having five planetary gearsets and seven shift elements for achieving various ratios between drive and output shafts. A forward gearset has three shafts. Two intermediate gearsets have four shafts. Two main gearsets have at least four shafts. Depending on the shift states of the second and third shift elements, the forward gearset can generate two rotational speeds at the output side, which transfer from a forward gearset shaft to an intermediate gearset shaft. Depending on the shift states of the first to fifth shift elements, the intermediate gearset can generate eight rotational speeds at the output side, which pass from another intermediate gearset shaft to a main gearset shaft. Depending on the shift states of the seven shift elements, the main gearset can generate up to fourteen forward and two reverse gears at the output side, which are transferred by another main gearset shaft to the output shaft.

Abstract: The disclosure provides a driving device of a vehicle, wherein even if a power storage device is fully charged, the driving device is capable of applying a corresponding decelerating force to a driving wheel. The driving device of the vehicle includes a motor as a driving source, a first planetary gear mechanism connected to the motor, a second planetary gear mechanism connected to the first planetary gear mechanism, and a differential mechanism connected with driving wheels from the second planetary gear mechanism, and further includes a brake detachably connecting a ring gear of the second planetary gear mechanism to a fixed-side member, and a lock mechanism capable of locking the differential mechanism.

Abstract: A transmission for a motor vehicle wherein the drive shaft (An) is rotationally fixedly connectable by the first shift element (K1) to the first shaft (1) and by the second shift element (K2) to the second shaft (2). The second shaft (2) is rotationally fixedly connectable by the fifth shift element (B2) to the housing (3). The third shaft (4) is rotationally fixedly connected to the third gear set element of the second planetary gear set (RS2) and to the first gear set element of the third planetary gear set and is rotationally fixedly connectable by the sixth shift element (B1) to the housing (3). The second gear set element of the third planetary gear set (RS3) is rotationally fixedly connected to the output shaft (Ab), and the third gear set element of the third planetary gear set (RS3) is rotationally fixedly connected to the second shaft (2).

Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include four clutches and two brakes.

Abstract: A shifting device includes a first shifting element operable to establish a torque-proof, positive-locking connection between a first element and a second element. A second shifting element is operable to establish a torque-proof, positive-locking connection between the second element and a third element. The first element is coupled to the third element such that displacement of the first element by a common actuating element in one of a first and a second displacement direction provides rectified displacement of the third element. The third element is coupled to the first element such that displacement of the third element by the common actuating element in one of the first and second displacement directions provides rectified displacement of the first element. The second element is fixed in position in both the first and second displacement directions. A related transmission is also provided.

Abstract: A four gearing-arrangement transmission having six shift-elements cooperatively engaging in combinations of three to provide nine forward speeds and one reverse speed. The transmission having a first gearing-arrangement with an end-gear fixedly coupled to a ground. A second gearing-arrangement with one end-gear fixedly coupled to an input and the other end-gear fixedly coupled to an interior-gear of the first gearing-arrangement. A third gearing-arrangement having an interior-gear fixedly coupled to an output. A fourth gearing-arrangement having a fourth interior-gear fixedly coupled to the input.

Abstract: The current invention discloses a multi-mode electro-mechanical variable speed transmission. The transmission includes an input shaft, an output system, planetary gear set having at least three braches each represents a co-axial rotating member, two electric machines along with the associated controllers for the electric machines, and a clutch. The first branch couples to the first electric machine with a constant speed ratio; the second branch couples to the output system with a constant speed ratio; and the third branch couples to the input shaft with a constant speed ratio; the second electric machine selectively couples to two different the branches of the planetary gear set with two different constant speed ratios, respectively. The multi-mode electro-mechanical variable speed transmission is capable of providing multiple operation modes including two electric drive modes and two power split operation modes.

Abstract: A planetary gear train of an automatic transmission for a vehicle is disclosed. The planetary gear train provides ten forward speed stages and one reverse speed stage by combining four planetary gear sets with seven control elements. The planetary gear train includes an input shaft, an output shaft, four planetary gear sets, eight shafts interconnecting rotation elements of the four planetary gear sets, four clutches, and three brakes for controlling operation of the planetary gear train. The planetary gear train is configured to have a gear ratio span greater than 10.0 while securing linearity of step ratios of shift stages.

Abstract: The present disclosure provides a planetary gear train of an automatic transmission for a vehicle. The planetary gear train may include: an input shaft receiving torque of an engine; an output shaft outputting 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 third planetary gear set including seventh, eighth, and ninth rotation elements; and a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements. The planetary gear train provides advantages of improving power delivery performance and fuel economy by achieving at least ten forward speed stages and one reverse speed stage.

Abstract: Disclosed herein is an automatic transmission (1) including first and second planetary gear sets (PL1) and (PL2). The first planetary gear set (PL1) has a first sun gear (S1) to which power from a power source (4) is input via an input shaft (3), and a first ring gear (R1) engaged with a first brake (B1). The second planetary gear set (PL2) has a second ring gear (R2) always engaged with a first carrier (C1), a second sun gear (S2) engaged with a second brake (B2), and a second carrier (C2) engaged with an output (output gear (7)). The automatic transmission is configured to engage the first and second brakes in a first gear to allow the power from the power source to be transmitted to the output via the input shaft and the first and second planetary gear sets.

Abstract: The present disclosure provides a planetary gear train of an automatic transmission for a vehicle. The planetary gear train 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 third planetary gear set including seventh, eighth, and ninth rotation elements; 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, first, second, third, and fourth planetary gear devices disposed between the input shaft and the output shaft to transmit rotary force, each of the first, second, third, and 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 multistage transmission, in particular for a motor vehicle, is provided at least structurally for selecting at least twelve forward transmission gears with different step-up ratios. This multistage transmission has four operatively interconnected planetary gear stages, a transmission input shaft for attaching to an internal combustion engine, a transmission output shaft, for attaching to drive wheels, four clutch units, each of which includes two clutch elements, and three brake units, each of which includes one clutch element.

Abstract: The present disclosure is directed to clutches and pistons used therein. A multi-plate clutch includes a shaft configured to provide rotational movement about a central axis of the clutch, a drum, wherein the drum comprises an inner surface with a plurality of splines formed therein and an opening about the central axis configured to receive the shaft, a plurality of ring-shaped discs configured to engage with the splines and a piston, wherein the piston comprises a plurality of protrusions on an outer circumferential surface of the piston configured to engage with the splines and an opening about the central axis configured to receive the shaft.

Abstract: A transmission for a vehicle may include 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 elements, and a plurality of friction members, in which the friction members are connected to at least one or more of the rotary elements of the planetary gear sets and control rotation of the rotary elements.

Abstract: The present invention relates to a powertrain for an automatic transmission. The powertrain for an automatic transmission consisting of an input shaft, an output shaft and first to third planetary gear sets comprises: first to seventh actuating elements constituting the first to third planetary gear sets; and shifting elements including first to fourth clutches and first and second brakes, wherein at least two of the shifting elements are actuated so that the first to seventh actuating elements are driven or restrained, thereby implementing eight forward speed and two reverse speed ratios.

Abstract: A family of transmission gearing arrangements produces nine forward and one reverse speed ratio by selective engagement of various combinations of three clutches or brakes. Each transmission gearing arrangement includes a front shiftable gearing arrangement configured to establish a variety of speed ratios between an intermediate shaft and an input shaft. These speed ratios include a reverse speed ratio, a zero speed ratio, two underdrive ratios, and a direct ratio. Each transmission also includes a rear shiftable gearing arrangement configured to selectively establish particular speed relationships among the input shaft, the intermediate shaft, and an output shaft.

Abstract: A transmission for a vehicle includes first, second, third and fourth planetary gear set, and a plurality of friction members. Each planetary gear set includes three rotating elements. The friction elements selectively and operably connect the rotating elements of the planetary gear sets to control rotation of the rotating elements. The transmission improves fuel efficiency by increasing the number of gears and enhances driving stability of the vehicle using an operating point in a low RPM range of the engine.

Abstract: A family of transmission gearing arrangements provides a plurality of forward speed ratios and one or more reverse speed ratios by selective engagement of shift elements in various combinations. Three simple planetary gear sets are located on the input axis. One of the simple planetary gear sets may have either a split-ring arrangement in which two ring gears are provided with one carrier and one sun gear, or a split-sun arrangement in which two sun gears are provided with one carrier and one ring gear.

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 them 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 and variably connected to a second rotary element of the first planetary gear device, the second rotary element 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 and variably connected to a third rotary element of the third planetary gear device.

Abstract: A multi-gear transmission having a housing, planetary gearsets, shafts and shifting elements. Input shaft (1) is connected or can couple the sun gear of gearset (RS3), and can couple the sun gear of gearset (RS1) and the carrier of gearset (RS1) and can couple the sun gear of gearset (RS2). Output shaft (2) is connected directly to the ring gear of gearset (RS4) and is connected or couple indirectly the carrier of gearset (RS3). The sun gear and the carrier of gearset (RS1) and the sun gear of gearset (RS4) can in each case couple the housing. The ring gear of gearset (RS1) is connected to the carrier of gearset (RS4) and is or can couple the ring gear of gearset (RS2), and the carrier of gearset (RS2) and the ring gear of the third planetary gearset (RS3) are or can be connected to one another.

Abstract: A transmission has one drive shaft, one output shaft, one housing, a first planetary gear set, a second planetary gear set, and a third planetary gear set, six shift elements, including a first brake, a second brake, a first clutch, a second clutch, a third clutch, and a fourth clutch. The shift elements selectively actuated, by which nine forward gears and one reverse gear are realized through different transmission ratio relationships between the drive shaft and the output shaft. Each planetary gear set features at least one sun gear, one planetary gear, one planetary carrier, and one ring gear. The drive shaft and the output shaft are arranged in a manner axially offset to each other, and the drive shaft is connectable to the sun gear of the first planetary gear set through the first clutch and to the first brake and the ring gear of the second planetary gear set through the second clutch. The ring gear of the second planetary gear set and the first brake are also connected to each other.

Abstract: A multi-stage transmission in which carrier of first gear set is connected to ring gear of fourth gear set, ring gear of first gear set and carrier of second gear set can be coupled to housing via first brake or to drive shaft via first clutch. Sun of first gear set and sun of second gear set can be coupled to housing via second brake. Sun of third gear set and sun of fourth gear set can be coupled to housing via third brake. Drive shaft can be coupled to ring gear of second gear set via second clutch. Ring gear of third gear set and carrier of fourth gear set can be coupled to drive shaft via third clutch, and output shaft is connected to carrier of third gear set.

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 planetary gear train may include an input shaft, an output shaft, first and second planetary gear sets each having three rotation elements, a first rotation shaft directly connected to one rotation element of the second planetary gear set and selectively connected to the input shaft, a second rotation shaft directly connected to one rotation element of the first planetary gear set and another rotation element of the second planetary gear set, and directly connected to the output shaft, a third rotation shaft directly connected to another rotation element of the first planetary gear set and the remaining rotation element of the second planetary gear set, and selectively connected to the input shaft and/or selectively connected to a transmission housing, and a fourth rotation shaft directly connected to the remaining rotation element of the first planetary gear set, and selectively connected to the input shaft through two paths and/or selectively connected to the transmission housing.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque, an output shaft disposed in parallel with and apart from the input shaft, a first planetary gear set having at least three rotation elements, a second planetary gear set having at least three rotation elements, a first rotation shaft, a second rotation shaft, a third rotation shaft, and a fourth rotation shaft.

Abstract: A planetary gear train may include an input shaft, an output shaft, first and second planetary gear sets each having three rotation elements, a first rotation shaft directly connected to one rotation element of the first planetary gear set and one rotation element of the second planetary gear set, and selectively connected to the input shaft, a second rotation shaft directly connected to another rotation element of the second planetary gear set and directly connected to the output shaft, a third rotation shaft directly connected to another rotation element of the first planetary gear set and the remaining rotation element of the second planetary gear set, and selectively connected to the input shaft and/or selectively connected to a transmission housing, and a fourth rotation shaft directly connected to the remaining rotation element of the first planetary gear set, and selectively connected to the input shaft through two paths and/or selectively connected to the transmission housing.

Abstract: A vehicular automatic transmission includes three single pinion planetary gear sets and a plurality of engagement elements. A plurality of gears is selectively established by three of the plurality of engagement elements being engaged and three of the plurality of engagement elements being released. One of the plurality of engagement elements is a dedicated reverse engagement element that is engaged when a reverse gear is established and is released when a forward gear is established.

Abstract: A powertrain includes a first electric motor, a second electric motor and a transmission. The first electric motor includes an interchangeable winding set to provide the required power for the specific propulsion configuration utilized to propel the vehicle, i.e., a hybrid propulsion configuration or a full electric propulsion configuration. The transmission is operable in different powerflows to support operation of the powertrain in either of the hybrid propulsion configuration or the full electric propulsion configuration. The same powertrain may be used for either the hybrid propulsion configuration or the full electric propulsion configuration by switching the specific winding set installed into the first electric motor.

Abstract: A planetary gear train of an automatic transmission for a vehicle include: an input shaft; an output shaft; a first compound planetary gear set combining first and second planetary gear sets and firstly changing torque input through one input path and two variable input paths into six speeds; a second compound planetary gear set combining third and fourth planetary gear sets, secondly changing the six speeds a rotation speed of the input shaft input through one variable input path into eleven forward speeds and reverse speed, and finally outputting the changed rotation speed; and friction members including clutches interposed between two rotation shafts or between a rotation shaft and the input shaft, and brakes interposed between a rotation shaft and a transmission housing.

Abstract: A transmission assembly may include a first clutch and a second clutch. The second clutch may include a clutch pack, a pressure chamber, a first piston, and a second piston. The first piston may be configured to push against the clutch pack when pressurized fluid is directed into the pressure chamber. The second piston may be configured to push against the first piston when pressurized fluid is directed into the pressure chamber at a time when the first clutch is unactuated and inhibited from pushing against the first piston at a time when the first clutch is actuated.

Abstract: The present disclosure provides a multi-ratio scalable transmission system for multiple vehicle configurations. The system includes an input disposed along a first axis configured to receive torque from a variable speed propulsion device and an output disposed along a second axis and coupled to the input. The system further includes a selectably engageable clutch coupled between the input and output and a planetary unit coupled to both the input and the output, where the planetary unit includes at least one planetary gearset and a brake. The system is configurable based on a particular vehicle configuration such that the first axis and second axis can be coaxial or non-coaxial.

Abstract: A multi-gear transmission of a vehicle having a housing in which four planetary gearsets and a plurality of shafts and shifting elements are arranged. The drive input shaft can couple the sun gears of gearsets (RS1, RS3) and the carrier of gearset (RS1) and can be connected indirectly to the carrier of gearset (RS2). The drive output shaft couples the ring gear of gearset (RS4) and is connected directly or can be indirectly connected to the carrier of gearset (RS3), the sun gear and carrier of gearset (RS1) and the sun gear of gearset (RS4) can be connected to the housing. The ring gear of gearset (RS1) couples the carrier of gearset (RS4) and can be or is connected to the sun gear of gearset (RS2), and the ring gear of gearset (RS2) and the ring gear of gearset (RS3) are, or can be, connected to one another.

Abstract: A planetary gear train of an automatic transmission for a vehicle include: an input shaft; an output shaft; a first compound planetary gear set combining first and second planetary gear sets and firstly changing torque input through one input path and two variable input paths into six speeds; a second compound planetary gear set combining third and fourth planetary gear sets, secondly changing the six speeds a rotation speed of the input shaft input through one variable input path into eleven forward speeds and reverse speed, and finally outputting the changed rotation speed; and friction members including clutches interposed between two rotation shafts or between a rotation shaft and the input shaft, and brakes interposed between a rotation shaft and a transmission housing.

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 brakes actuatable in combinations of two to establish a plurality of forward gear ratios and one reverse gear ratio.

Abstract: A two-step multi-step transmission in which a first planetary gear set (1) has two radially nested transmission sub-assemblies. The first planetary gearset has an inner sun gear (11), inner planetary gears (12), an outer sun gear (14) which is rotationally fixed to the inner ring gear (13), outer planetary gears (15), an outer ring gear (16), and a carrier (17) on which the inner planetary gears (12) and the outer planetary gears (15) are mounted. The inner ring gear (13) and the outer sun gear (14), respectively, are rotationally fixed to a second, traditionally designed planetary gear set (2) and can be locked via a brake (42).

Abstract: A transmission ratio step of a stepped transmission which can couple at least two parallel transmission shafts. Multiple transmission ratios can be implemented with the ratio steps. A planetary gear set, comprising three components, is located coaxial with a first shaft. A first component is connected to and driven by an input supplied along the first axis, and a second component meshes with at least one spur gear, each of which is placed on a further axis that is parallel to the first axis. A first transmission ratio can be engaged by fixing a third component of the planetary gear set, and a second transmission ratio can be implemented by connecting either the third or the second transmission component to the drive supplied along the first axis. At least one the transmission ratio steps is utilized in a stepped transmission of a motor vehicle transmission.

Abstract: An automated manual transmission for a vehicle includes an input shaft and an output shaft disposed parallel to each other, a controller and a plurality of external gear trains, planetary gear devices and friction elements. Each external gear train comprises two external gears coaxially and respectively provided on the input and output shafts, and selectively engaged with each other to form a series of gear stages. Each planetary gear device selectively connects one of the two external gears in a corresponding external gear train such that a state of transmitting rotating force to a shaft, on which the selected external gear is provided, can be changed. Each friction element controls rotation of a rotational element of a corresponding planetary gear device. The controller controls the friction elements in accordance with driving conditions of the vehicle, thereby shifting the gear stages.

Abstract: A planetary gear train of an automatic transmission may include: a first shaft; a second shaft parallel with the first shaft; a first gear set on the first shaft including a first element selectively connected to the first shaft, a second element selectively connected to the first shaft and a transmission housing, and a third element; a second gear set on the second shaft including a fourth element operably connected to the first element and selectively connected to the first shaft, a fifth element connected to the third element and directly connected to an output gear, and a sixth element selectively connected to the first shaft and selectively connected to the housing; three transfer gears; and frictional elements including clutches selectively connecting the first shaft to elements of the first and second gear sets and brakes selectively connecting elements of the first and second gear sets to the housing.

Abstract: A planetary gear train of an automatic transmission may include: a first shaft receiving engine torque; a second parallel shaft; a first planetary gear set on the first shaft including a first element engaging the first shaft and a transmission housing, a second element engaging the first shaft and the transmission housing, and a third output element; a second planetary gear set on the second shaft, and including a fourth element engaging the first element, a fifth element connected to the third element and directly connected to an output gear, and a sixth element connected to the first shaft and engaging the first element; three transfer gears; and frictional elements including four clutches connecting the first and second elements to the first shaft and connecting the first element to the fourth and sixth elements, and two brakes connecting the first and second elements to the transmission housing.

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. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes actuatable in combinations of two to establish at least ten forward gear ratios and one reverse gear ratio.

Abstract: A method for controlling a transmission includes the following steps: applying a first assist clutch to interconnect a first stationary member to a first planetary gear set of the transmission; applying a second assist clutch to interconnect a second stationary member to a second planetary gear set of the transmission, wherein the second planetary gear set is coupled to the output member of the transmission; applying a primary clutch to interconnect the first planetary gear set to a third stationary member; reducing a first pressure applied to the first assist clutch of the transmission by a first pressure calibration value; determining whether a gear lash has occurred; and reducing a second pressure applied to the second assist clutch of the transmission.

Abstract: A control apparatus for an automatic transmission includes a vehicle speed detector and a controller. The vehicle speed detector is configured to detect a vehicle speed. The controller is configured to set one of a plurality of gear change stages according to a running condition of a vehicle and configured to select one of a plurality of engagement combination states of a plurality of engagement mechanisms to achieve, according to the vehicle speed detected by the vehicle speed detector, at least one gear change stage out of the plurality of gear change stages in a case in which the controller sets the at least one gear change stage. The at least one gear change stage has the plurality of engagement combination states to achieve the at least one gear change stage.

Abstract: A planetary gear train of an automatic transmission may include an input shaft, an output shaft, a compound planetary gear set disposed on the output shaft, and including a first rotation element selectively connected to the input shaft through two paths respectively having an externally-meshed gear and operated as a selective fixed element, a second rotation element selectively connected to the input shaft through one path having an externally-meshed gear and operated as a selective fixed element, a third rotation, element connected to the output shaft, and a fourth rotation element selectively connected to the input shaft through one path having an externally-meshed gear, three transfer gears forming the externally-meshed gears, and friction elements provided with clutches selectively connecting the first, second, and fourth rotation elements to the input shaft and brakes selectively connecting the first and second rotation elements to a transmission housing.

Abstract: A transmission gearing arrangement produces ten forward speed ratios and four reverse speed ratio by selective engagement of three shift elements in various combinations. Some embodiment includes four simple planetary gear sets and seven shift elements of which three or four are brakes. Another embodiment includes two axis transfer gear pairs in place of one of the planetary gear sets. One of the brakes is used only in reverse and may be a latch.

Abstract: A family of transmission gearing arrangements produces at least nine forward speed ratios and one reverse speed ratio by selective engagement of three shift elements in various combinations. Each disclosed transmission includes four planetary gear sets, three brakes, and either three or four clutches. One embodiment produces twelve forward speed ratios and two reverse speed ratios. Another embodiment produces thirteen forward speed ratios.

Abstract: An automatic transmission includes an input shaft, an output member, a first planetary gear system, a second planetary gear system, a third planetary gear system, a fourth planetary gear system, and an engagement mechanism. The input shaft is configured to be rotated with power of a driving source relative to the transmission case. The output member is to output rotation of the input shaft using multiple gear-shifting. The multiple gear-shifting is provided by setting at least three of first to third clutches and first to third brakes in a connection state.