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 transmission has an input member, an output member, at least 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 three to establish a plurality of forward gear ratios and at least one reverse gear ratio.

Abstract: Power generated by an engine is inputted to a carrier of a first planetary gear mechanism. Power generated by a motor is inputted to a sun gear of a second planetary gear mechanism. Power from a ring gear of the first planetary gear mechanism and power from a carrier of the second planetary gear mechanism are combined and transmitted to an axle of driving wheels. While power input from the engine to the carrier of the first planetary gear mechanism is maintained, rotation of a sun gear of the first planetary gear mechanism is restricted with a first clutch, a second clutch or a first brake. While power input from the motor to the sun gear of the second planetary gear mechanism is maintained, rotation of a ring gear of the second planetary gear mechanism is restricted with a second brake or a third clutch.

Abstract: A transmission with nine forward and one reverse gear comprises planetary gearsets, shafts and shift elements. A sun gear of a first gearset (P1) is connectable to a housing via a first brake (03) and couples the sun gear of the second gearset (P2). A carrier of the first gearset (P1) couples the ring gear of the fourth gearset (P4). A ring gear of first gearset (P1) is connectable to the housing by a second brake (04). The carrier of the second gearset (P2) couples the input which is connectable by clutch (15) to the fifth shaft (5). The fifth shaft (5) respectively couples the sun and ring gears of the fourth and third gearsets (P4, P3) and is connectable to a seventh shaft (7) by clutch (57). The seventh shaft (7) respectively couples the sun and ring gears of the third and the second gearsets (P3, P2).

Abstract: A transmission gearing arrangement includes four simple planetary gear sets arranged in two planes to reduce axial length. Six shift elements, including two input clutches, two output clutches, and two brakes, are engaged in combinations of three to establish nine forward speed ratios and one reverse speed ratio. The two output clutches may be assembled into a module suitable for testing before installation.

Abstract: Provided is a transmission for a hybrid electric vehicle that makes it possible to more effectively transmit the torque from an engine to an output shaft, provide sufficient power performance in WOT (wide open throttle) start, achieve excellent controllability without generating transmission shock by allowing modes to be naturally and smoothly switched, and improve acceleration response.

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.

Abstract: A transmission is has an input member, an output member, a first planetary gear set assembly, a second planetary gear set assembly, a plurality of coupling members and a plurality of torque transmitting devices. The second planetary gear set assembly is a stacked planetary gear set having a first, a second, a third, a fourth and a fifth member and the first planetary gear set assembly has a first, a second, a third and a fourth member. The torque transmitting devices include clutches and brakes.

Abstract: A gear assembly for a motor vehicle includes first clutch configured to selectively couple an input shaft to an output shaft and a second clutch configured to selectively couple the input shaft to a planetary gear train. When the first clutch is activated and the second clutch is not activated, the input torque is transmitted from the input shaft to the output shaft such that the output torque relative to the input torque is a first gear ratio. When the second clutch is activated and the first clutch is not activated, the input torque is transmitted from the input shaft to the output shaft through the planetary gear train such that the output torque relative to the input torque is a second gear ratio. When neither the first clutch nor the second clutch are activated, the input torque is not transmitted from the input shaft to the output shaft.

Abstract: Three methods of fabricating an intermediate, center or combination gear for a stacked planetary gear assembly are presented. A first method comprehends forming male splines on the outer surface of the inner (ring) gear and female splines on the inner surface of the outer (sun) gear. The gears are then heat treated and assembled. A second method comprehends broaching internal splines in the outer (sun) gear as well as end milling, broaching or polygon turning face splines on one end of the outer gear and an opposing, adjacent end of the inner (ring) gear. A third method includes fabricating and heat treating the inner and outer gears. A small area of the hardened case is then removed by, for example, machining. The gears are mated, heated rapidly by a pulse of electric current and upset in the heated region.

Abstract: Disclosed is a range shift mechanism in the form of a floating planetary gear assembly for a transfer case. The range shift mechanical according to the present invention can improve power efficiency and generate low noises by suppressing gear rotation in a high range mode of the range shift system.

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: An exemplary embodiment of the present invention provides a power train for a hybrid vehicle can achieve three or more fixed gear ratio modes where a vehicle is driven at a fixed gear ratio, such as shift stages of common transmission, only by the driving force of an engine without driving a motor generator, as well as an electric vehicle mode, which is the basic drive modes of a hybrid vehicle, and two or more power division modes including an input division mode and a composite mode, thereby driving the vehicle with high efficiency in accordance with traveling conditions of the vehicle and improving fuel efficiency.

Abstract: A hybrid drive system configured with a power split device that performs a differential operation with at least three rotating elements including an input rotating element, a reaction force rotating element, and an output rotating element that is connected to the output member so that driving force is transmitted. A reduction gear that performs a differential operation with at least four rotating elements including an input rotating element, a stationary element, a first output rotating element, and a second output rotating element. A control portion selects an operating mode of the hybrid drive system, from among a first split mode, and a second split mode.

Abstract: A planetary gear train of an automatic transmission may include: an input shaft; an output shaft parallel with the input shaft; a first planetary gear set on the input shaft including a first, second and third rotation elements, the first selectively connected to the input shaft, and the third selectively connected to the input shaft; a second planetary gear set on the output shaft including a fourth, fifth and sixth rotation elements, the first selectively connected to the input shaft through two gear ratio paths and selectively connected to a transmission housing, the fifth selectively connected to the input shaft and the transmission housing, and the sixth connected to the second rotation element and directly connected to the output shaft; four transfer gears; and frictional elements including 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 a sun gear, a carrier member supporting a plurality of planet pinion gears and a ring gear member. The torque transmitting devices may include clutches and brakes. The torque transmitting devices are selectively engageable in combinations of at least three to establish a plurality forward speed ratios and at least one reverse speed ratio.

Abstract: A motor vehicle multi-stage planetary transmission which has a housing that accommodates four planetary gear sets (P1, P2, P3, P4), shafts (2-9), three clutches (K1, K2, K3) and three brakes (B1, B2, B3) whose selective actuation implements various transmission ratios between drive and output shafts. The carriers of gear sets (P1, P2) are connected by shaft (4), the ring gear of gear set (P2) can be fixed to the housing, via shaft (5), by actuating brake (B1). A ring gear of gear set (P1) and a sun gear of gear set (P2) are coupled by shaft (6) which can be connected, via clutch (K1), to the drive shaft. A sun gear of gear set (P1) can be fixed, via brake (B2), to the housing and can be coupled, by clutch (K2), to drive shaft. The first and second clutches (K1, K2) are startup elements which initiate startup procedures.

Abstract: A brake assembly includes first and second brakes, a gearset including first and second members, a hub held against rotation, the first brake selectively producing a connection between the hub and the first member, the second brake selectively producing a connection between the hub and the second member, and a support secured to a transmission case and the hub, the support formed with brake-apply circuits, each circuit corresponding to one of the brakes.

Abstract: An apparatus includes an electro-mechanical transmission including a transmission output shaft and first and second transmission input shafts selectively coupleable for rotation with a first torque generative device. A planetary gear set including first, second and third members and a reduction gear set selectively coupling the first transmission input shaft for rotation with the first member and selectively coupling the second transmission input shaft for rotation with the third member. A first gear set input shaft is selectively coupled for rotation with the first transmission input shaft and coupled for rotation with the reduction gear set. A second gear set input shaft is selectively coupleable for rotation with the second transmission input shaft and coupled for rotation with the reduction gear set. A second torque generative device is coupleable for rotation with one of the first and second gear set input shafts.

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. 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 between the input member and the output member.

Abstract: A transmission for a hybrid electric vehicle may include an input element, an output element, a first motor generator, a second motor generator, a first planetary gear set where the input element, the output element, and the first motor generator may be connected, a second planetary gear set where the output element and the second motor generator may be connected, a third planetary gear set, and a first clutch and a second clutch.

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 first, second and third members. The torque transmitting devices include clutches and brakes.

Abstract: The invention concerns an automatic transmission of planetary structure, comprising a drive input shaft (AN), a drive output shaft (AB), first, second, third and fourth planetary gear sets (RS1, RS2, RS3, RS4) and six shifting element (A, B, C, D, E, F). By the selective engagement of three of a total of six shifting elements (A to F), ten forward gears and up to two reverse gears can be engaged without range shifts.

Abstract: A gear train of an automatic transmission for vehicles has the advantages of simplifying structures of the automatic transmission and improving power delivery performance and fuel economy as a consequence of realizing at least nine forward speeds and one reverse speed by combining three simple planetary gear sets with four clutches and three brakes.

Abstract: A family of transmissions produces at least eight forward and one reverse speed ratio by selective engagement of various combinations of three clutches or brakes. Each transmission includes two fixed gearing arrangements that establish fixed speed relationships between an input shaft, and output shaft, and four other elements. Specifically, the input shaft is constrained to rotate at a speed between that of the first and second elements while the output shaft is constrained to rotate at a speed between that of the third and fourth elements. Additional gearing, clutches, and brakes establish specified selective speed relationships among these elements.

Abstract: A proposition is to provide a power transmitting mechanism for a hybrid vehicle having improved energy utilization efficiency. A power transmitting mechanism for the hybrid vehicle using powers of the engine and the motor/generator in a combined manner, the mechanism includes an engine drive shaft coupled to an engine output shaft via a main clutch; a motor output shaft of a motor/generator rotatably supported separately from the engine drive shaft; a drive shaft brake releasing/fixing the engine drive shaft; a motor-brake releasing/fixing the motor output shaft; and a planetary gear mechanism.

Abstract: A transmission for a hybrid electric vehicle may include an input element, an output element, first and second motor generators, a first planetary gear set, a second planetary gear set, a first clutch and a second clutch, wherein a first rotary elements of the first and second planetary gear sets may be connected with the output element, a second rotary element and a third rotary element of the first planetary gear set may be connected with the input element and the first motor generator, respectively, a second rotary element of the second planetary gear set may be connected with the second motor generator, a third rotary element of the second planetary gear set may be switched by the first clutch, and a fourth rotary element of the first planetary gear set and the second rotary element of the second planetary gear set may be switched by the second clutch.

Abstract: A family of transmissions produces at least eight forward and one reverse speed ratio by selective engagement of various combinations of three clutches or brakes. Each transmission includes two fixed gearing arrangements that establish fixed speed relationships between an input shaft, and output shaft, and four other elements. Specifically, the input shaft is constrained to rotate at a speed between that of the first and second elements while the output shaft is constrained to rotate at a speed between that of the third and fourth elements. Additional gearing, clutches, and brakes establish specified selective speed relationships among these elements.

Abstract: The invention concerns an automatic transmission of planetary structure, comprising a drive input shaft (AN), a drive output shaft (AB), first, second, third and fourth planetary gear sets (RS1, RS2, RS3, RS4) and six shifting element (A, B, C, D, E, F). By the selective engagement of three of a total of six shifting elements (A to F), ten forward gears and up to two reverse gears can be engaged without range shifts.

Abstract: A transmission includes an input member, an output member, a plurality of torque-transmitting mechanisms that are selectively engageable to establish at least four forward speed ratios and at least one reverse speed ratio between the input member and the output member, and one or more latches associated with one or more of the torque-transmitting mechanisms. The one or more latches engages the respective torque-transmitting mechanisms during or prior to a start event.

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: A transmission includes an input member, an output member, three planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. A first interconnecting member continuously interconnects the third member of the first planetary pear set with the second member of the second planetary gear set. A second interconnecting member continuously interconnects the third member of the second planetary sear set with the third member of the third planetary gear set. The torque transmitting devices include three clutches and two brakes.

Abstract: A family of transmission gearing arrangements produces up to ten forward and one reverse speed ratios by selective engagement of various combinations of three or four clutches. Each disclosed transmission includes four planetary gear sets and six clutches. Two of the clutches can be brakes.

Abstract: An automatic transmission is disclosed providing eight forward ratios and one reverse ratio wherein the first forward ratio is selected by engaging exactly one friction brake using an electro-mechanical actuator. An operating method is disclosed for a vehicle having a transmission with this characteristic. The disclosed operating method permits the engine to be shut off to save fuel while the vehicle is stationary and then to start moving before an engine driven pump creates hydraulic pressure to engage the clutches.

Abstract: A transmission includes an input and output member, two planetary gear set assemblies each having first, second, third, and fourth members, one interconnecting members continuously interconnecting a member of the first planetary gear set assembly with a member of the second planetary gear set assembly and six torque transmitting mechanisms selectively engageable to interconnect one of the first members, second members, third members, and fourth members with at least one of the input member and a stationary member. The torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member.

Abstract: A power train for a hybrid vehicle may include: a first planetary gear set that includes at least four rotary elements; a second planetary gear set that includes at least three rotary elements one of which is connected with at least one of the rotary elements of the first planetary gear set; a first clutch that is configured to connect/disconnect a rotary element of the first planetary gear set with/from a rotary element of the second planetary gear set; and a first brake that is provided to restrain rotation of a rotary element of the second planetary gear set, wherein at least two or more independent power sources and an output element are connected to the rotary elements of the first planetary gear set and the second planetary gear set.

Abstract: A vehicle multi-speed automatic transmission which comprises an input shaft (AN) and an output shaft (AB); first, second, third and fourth planetary gear sets (RS1, RS2, RS3, RS4); 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, in combinations of three engaged shifting elements, defines different gear ratios, between the input shaft (AN) and the output shaft (AB), for implementing eight forward gears and at least one reverse gear. When shifting from one forward gear into a successive higher or 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: A power transmission system of a hybrid electric vehicle may include an input shaft, a first planetary gear set having a third rotation element fixedly connected to the input shaft and a second rotation element fixedly connected to a first motor/generator, a second planetary gear set having a fourth rotation element selectively connected to the second rotation element, a fifth rotation element directly connected to the first rotation element, and a sixth rotation element fixedly connected to a second motor/generator, an output gear connected to the fifth rotation element, a first clutch selectively connecting the second rotation element with the fourth rotation element, a second clutch adapted to selectively connect the third rotation element with the second motor/generator, a first brake interposed between the fourth rotation element and a transmission housing, and a second brake interposed between the sixth rotation element and the 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. Each of the clutches and the brakes are located within specific areas defined by the planetary gear sets and the housing walls.

Abstract: An exemplary embodiment of the present invention provides a power train for a hybrid vehicle can achieve three or more fixed gear ratio modes where a vehicle is driven at a fixed gear ratio, such as shift stages of common transmission, only by the driving force of an engine without driving a motor generator, as well as an electric vehicle mode, which is the basic drive modes of a hybrid vehicle, and two or more power division modes including an input division mode and a composite mode, thereby driving the vehicle with high efficiency in accordance with traveling conditions of the vehicle and improving fuel efficiency.

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 first, second and third members. The torque transmitting devices include clutches and brakes.

Abstract: A transmission for a hybrid electric vehicle may include an input element where rotation power may be inputted and an output element from which the rotation power may be outputted, a first motor generator and a second motor generator, a first planetary gear set where the input element, the output element, and the first motor generator may be connected, a second planetary gear set that may be a multiple planetary gear set where the output element and the second motor generator may be connected and that includes at least four or more rotary elements, and a first clutch and a second clutch.

Abstract: An automatic planetary transmission comprising a drive input shaft (AN), a drive output shaft (AB), first, second, third and fourth planetary gearsets (RS1,RS2,RS3, RS4) and six shifting elements (A, B, C, D, E, F). By the selectively engagement, in each case, three of the six shifting elements (A, B, C, D, E, F), ten forward gears and up to two reverse gears can be engaged without any range shifts.

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: 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: A planetary gear assembly includes a ring gear configured for connection to a rotor of an electric motor when in a first position and configured for connection to a housing of the electric motor when in a second position, a sun gear configured for connection to the housing when the ring gear is in the first position and configured for connection to the rotor when the ring gear is in the second position, and a plurality of planet gears configured to mesh with the ring gear and the sun gear.

Abstract: A transmission comprising a first compound planetary gear set having a first brake engaged with a sun gear, a second compound planetary gear set having a second brake engaged with a ring gear, the first compound planetary gear set and the second planetary gear set axially engagable through a first clutch and a second clutch, and the transmission input and transmission output disposed coaxially and configured to input and output torque from the same side of the transmission.

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: An automatic transmission includes an input shaft rotatable by power from a driving source. A transmission unit is capable of changing a speed of rotation of the input shaft to any one of speeds at gears. The transmission unit includes at least one planetary gear mechanism having three elements. An output member outputs the transferred power with a speed changed by the transmission unit. A transfer mechanism switches between a transfer state of power between a motor connection element and the output member and an open state of no transfer of power. The transfer mechanism is in the transfer state in a low-speed gear range and in the open state in a high-speed gear range.