Abstract: An automatic transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may be either clutches or brakes.

Abstract: A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes. The torque transmitting devices are selectively engageable in combinations of at least three to establish at least eleven forward speed ratios and at least one reverse speed ratio.

Abstract: A multi-speed transmission having four gearsets, eight shafts and six shifting elements. The sun gear of gearset (P2) couples, via shaft (5) and brake (05), the housing (G), and, via clutch (15) the drive shaft. The carriers of gearsets (P2, P3) communicate, via shaft (4) and brake (04), with housing (G), and the sun gear of gearset (P3) communicates, via shaft (8) and clutch (18), with the drive shaft. The ring gears of gearsets (P2, P3) communicate, via shaft (6), with the ring gear of gearset (P4) and the sun gear of gearset (P1). The ring gear of gearset (P4) and the sun gear of gearset (P1) are connected with one another. The sun gear of gearset (P4) communicates, via shaft (3) and brake (03), with housing (G). The carriers of gearsets (P1, P4) communicate, via shaft (7) and clutch (17), with the drive shaft and the output shaft couples the ring gear of gearset (P1).

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.

Abstract: A front wheel drive 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 a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting devices include clutches and brakes arranged within a transmission housing. Each of the clutches and the brakes are located within specific areas defined by the planetary gear sets and the housing walls.

Abstract: One implementation of a six-speed transmission includes a first gearset including first and second planetary gearsets each having a number of teeth. The transmission also has a second gearset including a third planetary gearset operably associated with the first and second planetary gearsets. The third planetary gearset has an equal number of teeth with respect to one of the first and second planetary gearsets. The transmission also has a first plurality of shift elements operably associated with the first and second planetary gearsets, each of the first plurality of shift elements being movable between a released state and an applied state to selectively engage at least one of the first and second planetary gearsets. The transmission also has a second plurality of shift elements operably associated with the third planetary gearset, each of the second plurality of shift elements being movable between a released state and an applied state to selectively engage the third planetary gearset.

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.

Abstract: A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes. The torque transmitting devices are selectively engageable in combinations of at least three to establish at least ten forward speed ratios and at least one reverse speed ratio.

Abstract: A bicycle comprising a frame and at least one wheel attached to the frame, the frame further comprising a receiver, a first planetary gear transmission disposed in the receiver, the wheel having a hub, a second planetary gear transmission disposed in the hub, and an endless member for transmitting a torque trained between the first planetary gear transmission and the second planetary gear transmission.

Abstract: An eight-gear transmission comprises an input shaft, an output shaft, four planetary gear sets and five gear shifting elements.

Abstract: An automatic transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may be either brakes or clutches. Eight forward speeds or gear ratios and reverse are achieved by engaging various combinations of the brakes and clutches.

Abstract: A planetary gear mechanism for a bicycle, and more particularly to a planetary gear mechanism comprising a first planetary mechanism connected coaxially in series to a second planetary mechanism, which second planetary mechanism is connected coaxially in series to a third planetary mechanism, the second planetary mechanism output is a step up in speed from the first planetary mechanism output, the third planetary mechanism output is a step up in speed from the second planetary mechanism output.

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.

Abstract: A gear train of an automatic transmission for a vehicle may include four planetary gear sets with three clutches and two brakes and realizes eight forward speeds, and the gear train of an automatic transmission for a vehicle may minimize the number of friction elements, simplify the scheme of an transmission, and enhance transmitting power efficiency and fuel efficiency. The four planetary gear sets may include 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, and a fourth planetary gear set including a fourth sun gear, a fourth planet carrier, and a fourth ring gear.

Abstract: A multi-speed automatic transmission of a planetary design for a motor vehicle, the transmission comprises an input shaft (AN) and an output shaft (AB); first, second, third and fourth planetary gear sets (RS1, RS2, RS3, RS4); and at least third, fourth, fifth, sixth, seventh and eighth rotatable shafts (3, 4, 5, 6, 7, 8) and first, second, third, fourth and fifth shifting elements (A, B, C, D, E) whose selective engagement defines different gear ratios between the input shaft (AN) and the output shaft (AB) such that eight forward gears and at least one reverse gear can be implemented. When shifting from one forward gear into one of a successive higher and a successive lower forward gear, only a single one of the first, the second, the third, the fourth and the fifth shift elements is disengaged and only a single one of the first, the second, the third, the fourth and the fifth shift elements is engaged.

Abstract: The transmission includes input and output shafts, gearsets (RS1, RS2, RS3, RS4), shafts (1, 2, 3, 4, 5, 6, 7, 8), and elements (A, B, C, D, E). A carrier of gearset (RS4) couples the input shaft forming shaft (1). A carrier of gearset (RS3) couples the output shaft forming shaft (2). Sun gears of gearsets (RS1, RS4) couple forming shaft (3). Ring gears of gearsets (RS1, RS2) respectively form shafts (4, 8). A carrier and sun gear respectively of gearsets (RS2, RS3) couple forming shaft (5). A carrier and ring gear respectively of gearsets (RS1, RS3) couple forming shaft (6). Sun and ring gears respectively of gearsets (RS2, RS4) couple forming shaft (7). In the power flow, elements (A, B) are respectively between (3, 4) and a housing, element (C) between (1, 5), element (D) between either (2, 8) or (6, 8), shifting element (E) between two of (5, 7, 8).

Abstract: A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes.

Abstract: A 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 a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting devices include clutches and brakes arranged within 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 a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting devices include clutches and brakes arranged within a transmission housing.

Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide eight forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets having five torque-transmitting mechanisms, three fixed interconnections and a grounded 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, 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 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 a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting devices include clutches and brakes arranged within a transmission housing.

Abstract: A transmission having gearsets (RS1-RS4), shafts (1-8) and shifting elements (A-E). A carrier of gearset (RS4) and an input shaft forming shaft (1), a carrier of gearset (RS3) and an output shaft form shaft (2), sun gears of gearsets (RS3, RS4) form shaft (3). A ring gear of gearset (RS1) forms shaft (4). Ring and sun gears respectively of gearsets (RS2, RS1) couple as shaft (5), a carrier of gearset (RS1) and a ring gear of gearset (RS3) form shaft (6), sun and ring gears respectively of gearsets (RS2, RS4) couple as shaft (7). A carrier of gearset (RS2) forms shaft (8). Located in the flow of power: elements (A, B) are respectively between shafts (3, 4) and a housing, element (C) between shafts (5, 1), element (D) between shafts (8, 2) or (8, 6) and element (E) between two of shafts (5, 7, 8).

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 a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting devices include clutches and brakes arranged within a transmission housing.

Abstract: A transmission having input and output shafts, gearsets (RS1-RS4), shafts (1-8) and elements (A-E). Carriers of gearsets (RS4, RS3) are respectively connected to the input and the output forming shafts (1, 2). Sun gears of gearsets (RS1, RS4) are coupled forming shaft (3). The ring gear and a carrier respectively of gearsets (RS1, RS2) form shafts (4, 8). Ring gears of gearsets (RS2, RS4) respectively couple sun gears of gearsets (RS3, RS2) forming shafts (5, 7). A carrier of gearset (RS1) and a ring gear of gearset (RS3) are connected forming shaft (6). In the power flow, elements (A, B) are respectively arranged between shafts (3, 4) and a transmission housing, element (C) between shafts (5, 1), element (D) between shafts (8, 2) or (8, 6), and element (E) between two of shafts (5, 7, 8).

Abstract: An automatic transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and a brake.

Abstract: A transmission includes four planetary gearsets and five torque transmitting devices operative to provide eight forward speed ratios. At least one of the torque transmitting devices is engaged during two different speed ratios. The torque transmitting device includes a piston partially defining two separate and independently pressurizable chambers. Accordingly, the transmission enables both chambers to be pressurized for speed ratios in which a high torque capacity is required of the torque transmitting device, and only one of the chambers to be pressurized for speed ratios in which a low torque capacity is required of the torque transmitting device.

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

Abstract: A transmission having input and output shafts, planetary gearsets (RS1, RS2, RS3, RS4), and additional shafts and shifting elements. A ring gear of set (RS4) and the input shaft define shaft (1). A carrier of (RS3) and the output define shaft (2). The sun gears of (RS1, RS4) define shaft (3). A ring gear of (RS1) forms shaft (4). A ring gear of (RS2) and a sun gear of (RS3) define shaft (5). A carrier of (RS1) and a ring gear of (RS3) form shaft (6). A sun gear of (RS2) and a carrier of (RS4) define shaft (7). A carrier of (RS2) forms shaft (8). A first element (A) couples shaft (3) to the transmission housing. A second element (B) couples shaft (4) to the housing. A third element (C) couples shafts (1, 5) to one another. A fourth element (D) couples shafts (2, 8) or (6, 8) to one another. A fifth element (E) couples shafts (5, 7), (7, 8) or (5, 8) to one another.

Abstract: A multi-speed automatic planetary transmission for a motor vehicle having an input shaft (AN), an output shaft (AB), four planetary gearsets (RS1, RS2, RS3, RS4), at least eight rotatable shafts (1, 2, 3, 4, 5, 6, 7, 8), and five shifting elements (A, B, C, D, E), the selective engagement of which produces different transmission ratios between the input shaft (AN) and the output shaft (AB), such that eight forward gears and at least one reverse gear are possible. Further, it is possible to connect an electric machine (12) as generator and/or drive, to the fifth shaft (5) by means a drive connection.

Abstract: The 8-gear multi-step transmission comprises a drive input shaft (AN), a drive output shaft (AB), four planetary gearsets (RS1, RS2, RS3, RS4), eight rotary shafts (1, 2, 3, 4, 5, 6, 7, 8) and five shift elements (A, B, C, D, E). An internal gear (HO1) of the first planetary gearset (RS1) and the drive input shaft (AN) are connected to one another as the first shaft (1). A carrier (ST4) of the fourth gearset (RS4) and the drive output shaft (AB) are connected to one another as the second shaft (2). A sun gear (SO2) of the second gearset (RS2), and a sun gear (SO3) of the third gearset (RS3) are connected to one another as the third shaft (3). An internal gear (HO2) of the second gearset (RS2) forms the fourth shaft (4). An internal gear (HO3) of the third gearset (RS3) forms the fifth shaft (5). A carrier (ST2) of the second gearset (RS2) and an internal gear (HO4) of the fourth gearset (RS4) are connected to one another as the sixth shaft (6).

Abstract: A multi-speed transmission has input and output shafts, gearsets (RS1, RS2, RS3, RS4), shafts (1, 2, 3, 4, 5, 6, 7, 8), and shifting elements (A, B, C, D, E). A carrier of gearset (RS4) and the input shaft couple as shaft (1). A carrier of gearset (RS3) and the output shaft couple as shaft (2). Sun gears of gearsets (RS1, RS4) couple as shaft (3). Ring gears of coupled gearsets (RS1, RS2) respectively form shafts (4, 8). Sun gears of gearsets (RS2, RS3) couple as shaft (5). A carrier of gearset (RS1) and a ring gear of gearset (RS3) couple as shaft (6). A carrier of gearset (RS2) and a ring gear of gearset (RS4) couple as shaft (7). Arranged within the power flow: elements (A, B) are respectively between shaft (3, 4) and a transmission housing; element (C) between shafts (1, 5); element (D) between either shafts (2, 8) or (6,8); element (E) between two of shafts (5, 7, 8).

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

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 four selectable torque-transfer devices. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and 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: A eight-speed powertrain of an automatic transmission for a vehicle combining four simple planetary gear set with a plurality of clutches and brakes to realize seventh forward speed or eighth forward speed and two reverse speeds can improve power delivery performance and reduce fuel consumption.

Abstract: The transmission has an input and output shaft, planetary gearsets, rotatable shafts, and shifting elements. A carrier of the gearset (RS4) and the input shaft are coupled to form the shaft (1). A ring gear of the gearset (RS2), a carrier of the gearset (RS3), and the output shaft are coupled to form a shaft (2). A sun gear of the gearset (RS1) and a sun gear of the gearset (RS4) are coupled to form shaft (3). A ring gear of the gearset (RS1) forms the shaft (4). A sun gear of the gearset (RS3) and a carrier of the gearset (RS2) are coupled to form the shaft (5). A carrier of the gearset (RS1) and a ring gear of the gearset (RS3) are coupled to form the shaft (6). A ring gear of the gearset (RS4) forms the shaft (7). A sun gear of the gearset (RS2) forms the shaft (8).

Abstract: An eight-gear gearbox comprises an input shaft, an output shaft, four planetary gear sets, eight rotatable shafts and five shifting elements.

Abstract: A front wheel drive 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 a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting devices include clutches and brakes arranged within a transmission housing.

Abstract: A front wheel drive 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 a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting devices include clutches and brakes arranged within a transmission housing.

Abstract: A transmission is provided having an input member, an output member, three planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting devices include clutches and brakes arranged within a transmission housing.

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

Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide eight forward speed ratios and one reverse speed ratio. The transmission includes four planetary gear sets having five torque-transmitting mechanisms, three fixed interconnections and a grounded 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, 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: On an input shaft are provided in order from a side of an engine a torque converter with a lock-up clutch, a first planetary gear set as a multiplying mechanism, a counter drive gear outputting a rotational drive force to a countershaft, a second planetary gear set as a speed-change element, a third planetary gear set as a speed-change element. Accordingly, there can be provided an automatic transmission for six forward speeds with plural planetary gear sets, clutches and brakes that can properly reduce a clutch capacity and restrain gear noises with its compact and light-weighted structure.

Abstract: A powertrain incorporates a multi-speed planetary transmission having four planetary gearsets and seven torque-transmitting mechanisms. The planetary gearsets are interconnected and controlled by the torque-transmitting mechanisms in combinations of two, such that eight forward speeds and three reverse speeds are developed between an input shaft and an output shaft of the transmission.

Abstract: A powertrain includes an engine with an engine output member and a transmission with two motor/generators and a transmission input member operatively connected to the engine output member. A control unit is configured to selectively cause a device to resist or prevent rotation of the input member in response to the existence of certain conditions, such as the engine not supplying torque to the transmission and the transmission being in reverse operating mode. Resisting or preventing rotation of the input member improves transmission performance when only the motor/generators are supplying torque to propel the vehicle. A corresponding method is also provided.

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 two-mode, compound-split, electro-mechanical transmission utilizes an input member for receiving power from an engine, and an output member for delivering power from the transmission. First and second motor/generators are operatively connected to an energy storage device through a control for interchanging electrical power among the storage device. The transmission employs three planetary gear sets that cooperate with a plurality of torque transmitting devices to provide two distinct gear trains or power paths corresponding to two modes of electrically variable operation in which the speed ratio between the input member and the output member varies with the speed of at least one of the motor/generators. The torque transmitting devices are selectively engageable to provide six discrete, fixed speed ratios.

Abstract: Durability and power transmission efficiency are enhanced in a six-speed powertrain of an automatic transmission by a scheme that includes first to forth planetary gearsets. The first planetary gearset includes a first sun gear, first ring gear, and first carrier. The second planetary gearset includes a second sun gear, a second ring gear, and a second carrier. The third planetary gearset includes operational elements of a third sun gear, a third ring gear, and a third carrier. The fourth planetary gearset includes a fourth sun gear, a fourth ring gear, and a fourth carrier. The powertrain also includes an input shaft, an output gear, and a transmission case.

Abstract: Durability and power transmission efficiency are enhanced in a six-speed powertrain of an automatic transmission by a scheme that includes first to forth planetary gearsets. The first planetary gearset includes a first sun gear, first ring gear, and first carrier. The second planetary gearset includes a second sun gear, a second ring gear, and a second carrier. The third planetary gearset includes operational elements of a third sun gear, a third ring gear, and a third carrier. The fourth planetary gearset includes a fourth sun gear, a fourth ring gear, and a fourth carrier. The powertrain also includes an input shaft, an output gear, and a transmission case.

Abstract: The powertrain includes an arrangement of three single planetary gearsets of which operational elements are wisely interconnected to one another via two clutches and to the transmission via three brakes so as to form six forward speeds and one reverse speed, to be adaptable to a rear wheel drive vehicle.

Abstract: A multiple stage transmission in planetary design comprises three planetary gear sets (P1, P2, P3), at least six rotatable shafts (1, 2, 3, 4, 5, 6), at least six shifting elements (03, 04, 13, 16, 45, 56), the drive shaft (1) is permanently connected with the spider of the first planetary gear set (P1) and, via one clutch (16), with the shaft (6) which is connected with the sun gears of the second planetary gear sets (P2) and connectable, via the clutch (56), with the, the driven shaft (2) being connected with the spider of the third planetary gear set (P3), the shaft (3) is permanently connected with the sun gear of the third planetary gear set (P3) and the ring gear of the second planetary gear set (P), via one clutch (13) connectable with the drive shaft (1) and, via one brake (03), attachable to the housing (G) and the sun gear of the first planetary gear set (P1) being non-rotatably connected via one shaft (0) with the housing (G).