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 and three electric machines serving interchangeably as motors or generators. The three motor/generators are operable in a coordinated fashion to yield an EVT with a continuously variable range of speeds (including reverse).

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 six selectable torque-transfer devices, which may include a dog clutch. The selectable torque transfer devices are engaged singly or combinations of two to yield an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.

Abstract: A planetary gear unit PR and a clutch C3 for outputting reduced speed rotation and a clutch C1 for connecting and disconnecting input of rotation of an input shaft to a sun gear S2 are located on one axial side of a planetary gear unit PU, and a clutch C2 for connecting and disconnecting input of rotation of the input shaft to the carrier CR2 is located on the axially opposite of the planetary gear unit PU. By doing so, as compared to a case wherein, for example, a clutch C1 and clutch C2 are both located between a pair of planetary gear units PR and PU, the planetary gear units PR and PU can be located more closely together, and the member that transmits the reduced speed rotation from planetary gear unit PR to planetary gear unit PU can be made shorter. Further, compared to the case wherein, for example, the clutches C1, C2, C3 are located on one axial side of the planetary gear units, the construction of the oil lines is simplified.

Abstract: The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, up to five selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.

Abstract: In a contra rotating propeller engine propeller blade assemblies are provided which rotate in opposite directions as a result of association with an epicyclic gear assembly acting as a differential gearbox. A carrier is provided to drive one propeller blade assembly. Actuators are provided to cause pitch angle adjustment of the respective propeller blades of the assemblies. These actuators, are secured upon a stationary structure and act through actuator rods and appropriate mechanisms to cause such angular pitch adjustment. Rotational de-couplers are provided to rotationally isolate the actuators whilst an actuator rod part acts across the assemblies and a rotational de-coupler to de-couple contra rotation between the assemblies whilst still allowing axial displacement for adjustment of the other propeller blade assembly.

Abstract: An electromagnetic selection device of a two-stage planetary gear set (1) having one input shaft (2) and one output shaft (3), one sun gear (8), one ring gear (11), one planet carrier (10) with planetary gears (9), one transmission housing (6) and one sliding sleeve (14) for switching one first gear in which the ring gear (11) can be coupled with the housing (6) and one second gear in which the ring gear (11) can be coupled with the sun gear (8), the sliding sleeve (14) being movable by way of one electromagnet consisting of magnet coils (22, 23) and one armature (24). It is proposed that the armature (24) be situated rotatably, but axially fixed, upon the sliding sleeve (14).

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms and three interconnecting members. The powertrain includes an engine that is selectively connectable to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members, the input shaft and the transmission housing, and are operated in combinations of two to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: The system includes at least two power disc elements, each mounted for rotation on a central shaft which is typically fixed. The first power disc element includes a first peripheral gear portion by which the first power disc element may be turned by an input assembly. The first power disc element has a second gear portion which may have a substantially smaller diameter than the outside diameter thereof. A second power disc portion has a plurality of outer drive gears mounted for rotation to mate with the second peripheral gear portion on the first power disc element. A central gear, which may be substantially larger than the outer drive gears, is positioned to mate with the outer drive gear in the the second power disc element. The second power disc element drives an output assembly.

Abstract: The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and up to five selectable torque-transfer devices, and possibly a dog clutch. The selectable torque transfer devices are engaged singly or combinations of two to yield an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.

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

Abstract: An automatic transmission having first and second groups of successive forward-drive positions for outputting a rotary motion a speed of which is higher than the speed of a rotary motion received from an input member, the first group being established by an engaging action of a first input clutch while the second group being established by an engaging action of a second input clutch, or first and second groups of successive forward-drive positions for reducing the speed of the rotary motion received from the input member, the first and second groups being established by an engaging action of a first and second input clutches respectively. The successive operating positions of the first group have respective speed ratios different from those of the second group. The automatic transmission is shiftable to a selected one of the successive operating positions of a selected one of the first and second groups.

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

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

Abstract: A two-mode compound-split hydro-mechanical powertrain employs a hydro-mechanical continuously variable transmission having two hydraulic units, at least two torque-transmitting mechanisms, and a planetary gear arrangement for combining the output of an engine and the two hydraulic units into a single output mechanism.

Abstract: An electrically variable transmission includes an input member to receive power from an engine about a primary axis; an output member connected to a transfer member for transmitting power to a secondary axis; first and second motor/generators; first and second torque transfer devices; and first and second planetary gear sets each having first, second and third members. The input member is continuously connected to the first member of the first gear set, and the output member is continuously connected to the first member of the second gear set. The first motor/generator is continuously connected to the second member of the first gear set. The second motor/generator is continuously connected with the third member of the first or second gear set. The transfer member is positioned between the first and second motor/generators.

Abstract: A portable power tool with a housing, a motor having a motor output member, a driven member and a transmission. The transmission, which is located in the housing, is configured to receive a rotary input from the motor output member and to produce a rotary output that is transmitted to the output spindle. The transmission has a plurality of planetary transmission stages, each of which including a ring gear, a planet carrier and a plurality of planet gears that are supported by the planet carrier for meshing engagement with the ring gear. The transmission further includes at least one member that may be configured in a first condition, which renders at least one of the planetary transmission stages operable in an active mode, and a second condition, which renders at least one of the planetary transmission stages operable in an inactive mode. The transmission is operable in at least three overall speed reduction ratios.

Abstract: A multi-speed transmission assembly for a rotary power tool. The transmission assembly includes a plurality of transmission stages, with at least two of the transmission stages employing a movable reduction element that permits the transmission stage to be operated in an active mode and an inactive mode. The movable reduction elements are coupled to a switching mechanism that switches the reduction elements in a predetermined manner to provide at least three-gear reduction or speed ratios.

Abstract: This invention is a mechanical gearbox for every vehicle or machinery that needs one. It works on the grounds of the differential gear as a way to obtain mechanical addition or subtraction of the motion of two different shafts. Inside this mechanism an input-shaft-motion subdivision take place over other different shafts, which speeds are recombined together by differential gears, returning over an output-shaft a wide-range of selectable speeds with their proportional torque (transmission ratios).

Abstract: The multi-step reduction gear includes a drive shaft and an output shaft, having three single rod planetary gears, seven rotating shafts and six shifting elements, whose selective engagement realizes seven forward gears and one reverse gear, the drive takes place through a shaft, connected with the sun wheel of the first planetary gears. The output takes place through a shaft in connection with the annulus of the second planetary gear and the annulus of the third planetary gears. A shaft is connected with the rod of the first planetary gears; a shaft is connected with the rod of the second planetary gears and the rod of the third planetary gears; a shaft is connected with the annulus of the first planetary gear set; a shaft is connected with the sun wheel of the third planetary gears; a shaft is connected with the sun wheel of the second planetary gears.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms and three interconnecting members. The powertrain includes an engine that is selectively connectable to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members, the input shaft and the transmission housing, and are operated in combinations of two to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: The transmission 10 is constructed so that, in the first transmission portion 36, the rotation of the input shaft 16 is outputted to the second transmission portion 38 via the first intermediate output path M1 and the second intermediate output path M2 accelerated and rotated with respect to the first intermediate output path M1, and, in the second transmission portion 38, the first rotary element RE1 (S2 and S3) is selectively connected to the first driven gear CG1B via the first clutch C1 and is selectively connected to the second driven gear CG2B via the third clutch C3, the second rotary element RE2 (CA1 and CA2) are selectively connected to the first driven gear CG1B via the second clutch C2 and are selectively connected to the transmission case 12 operating as a non-rotating member via the first brake B1, the third rotary element RE3 (R1, R2 and CA3) is connected to the output gear 28 operating as an output rotating member, the fourth rotary element RE4 (S1) is selectively connected to the transmission

Abstract: A hybrid powertrain incorporates an engine, two motor/generator units and three planetary gearsets along with three torque-transmitting mechanisms to provide a two-mode compound-split electrically variable transmission.

Abstract: The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and four or five selectable torque-transfer devices. The selectable torque transfer devices are engaged singly or in combinations of two to yield an EVT with a continuously variable range of speeds (including reverse) and three mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms and a grounded planetary gear member. The powertrain includes an engine and torque converter that is continuously connected to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members and the transmission housing, and are operated in combinations of four to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms, two interconnecting members, and a grounded planetary gear member. The powertrain includes an engine that is selectively connectable to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members, the input shaft and the transmission housing, and are operated in combinations of three to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms and three fixed interconnecting members. The powertrain includes an engine that is selectively connectable to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members, the input shaft and the transmission housing, and are operated in combinations of three to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward torque ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms, and two interconnecting members, one of which is grounded. The powertrain includes an engine that is selectively connectable to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members, the input shaft and the transmission housing, and are operated in combinations of three to establish at least eight forward torque ratios and at least one reverse speed ratio.

Abstract: A multiple stage transmission of a planetary design having first, second and third planetary gear sets (P1, P2, P3), at least first, second, third, fourth, fifth and sixth rotatable shafts (1, 2, 3, 4, 5, 6), first and second brakes (03, 04) and first, second, third and fourth clutches (14, 15, 36, 56). Selective engagement of the planetary gear sets (P1, P2, P3), the rotatable shafts (1, 2, 3, 4, 5, 6), the brakes (03, 04) and the clutches (14, 15, 36, 56) produces different reduction ratios between the drive shaft and the driven shaft such that eight forward gears and at least one reverse gear is achieved.

Abstract: A multiple stage transmission of a planetary design having first, second and third planetary gear sets (P1, P2, P3), at least first, second, third, fourth, fifth and sixth rotatable shafts (1, 2, 3, 4, 5, 6), first and second brakes (03, 04) and first, second third and fourth clutches (14, 15, 36, 56). Selective engagement of the planetary gear sets (P1, P2, P3), the rotatable shafts (1, 2, 3, 4, 5, 6), the brakes (03, 04) and the clutches (14, 15, 36, 56) produces different reduction ratios between the drive shaft and the driven shaft such that seven or eight forward gears and at least one reverse gear is achieved.

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

Abstract: A multiple stage transmission of a planetary design having first, second and third planetary gear sets (P1, P2, P3), at least first, second, third, fourth, fifth sixth rotatable shafts (1, 2, 3, 4, 5, 6), first and second brakes (03, 04)and first, second, third and fourth clutches (14, 15, 36, 56). Selective engagement of the planetary gear sets (P1, P2, P3), the rotatable shafts (1, 2, 3, 4, 5, 6,), the brakes (03, 04) and the clutches (14, 15, 36, 56) produces different reduction ratios between the drive shaft and the driven shaft such that at least seven forward gears and at least one reverse gear are achieved.

Abstract: A gear unit for the drive of a rotating tube is provided with a drive shaft and a power distributing gear unit stage that is configured as a helical gear unit with an intermediate shaft having mounted thereon two helical pinions. A load-summing gear unit stage with a take-off shaft is operated downstream of the gear unit stage. In this connection, the take-off shaft is on the central axis of the driven rotating tube. The load-summing gear unit stage is comprised of two parallel operated planetary gear units each having a sun gear, planetary gears each disposed on a respective planetary axle, a hollow gear and a common planet carrier that is configured as a single piece and connected with the take-off shaft. The planetary axles of both planetary gear units in the common planet carrier are spaced from one another and offset from one another.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms, two interconnecting members, and a grounded planetary gear member. The powertrain includes an engine that is selectively connectable to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members, the input shaft and the transmission housing, and are operated in combinations of three to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms and two interconnecting members, one of which is grounded. The powertrain includes an engine that is selectively connectable to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members, the input shaft and the transmission housing, and are operated in combinations of three to establish at least eight forward speed ratios and at least one reverse speed ratio.

Abstract: A portable power tool with a housing, a motor having a motor output member, a driven member and a transmission. The transmission, which is located in the housing, is configured to receive a rotary input from the motor output member and to produce a rotary output that is transmitted to the output spindle. The transmission has a plurality of planetary transmission stages, each of which including a ring gear, a planet carrier and a plurality of planet gears that are supported by the planet carrier for meshing engagement with the ring gear. The transmission further includes at least one member that may be configured in a first condition, which renders at least one of the planetary transmission stages operable in an active mode, and a second condition, which renders at least one of the planetary transmission stages operable in an inactive mode. The transmission is operable in at least three overall speed reduction ratios.

Abstract: A planetary-gear-type multiple-step transmission including a stationary member, an input rotary member, an output rotary member, and first and second transmission units. The first transmission unit transmits a rotary motion from an input rotary member to the second transmission unit through first and second intermediate transmitting paths such that a speed of the rotary motion transmitted through the second intermediate transmitting path is lower than that of the rotary motion transmitted through the first intermediate transmitting path. The second transmission unit constitutes first, second, third, fourth and fifth rotary elements, each of which is provided by at least one of sun gears, carriers and ring gears of three planetary gear sets. The first rotary element is selectively connected to the second intermediate transmitting path, while being selectively connected to the stationary member. The second rotary element is selectively connected to the first intermediate transmitting path.

Abstract: In a planetary reduction gear device of a starter, a planet carrier forms gear shafts and planetary gears are rotatably supported by the gear shafts through bearings. The planet carrier further forms waste shafts projecting in a direction same as that of the gear shafts. The waste shafts are arranged on a circle having a center coincident with a rotation axis of the clutch outer portion at regular intervals in a circumferential direction. The circle on which the waste shafts are arranged has a diameter different from that of a circle on which the gear shafts are arranged. A speed reduction ratio can be changed by mounting planetary. gears having a gear specification different from that of the planetary gears supported on the gear shafts on the waste shafts. The planet carrier can be integrally formed with a clutch outer portion of a one-way clutch.

Abstract: A speed transmission apparatus containing a first rotary crankcase, a double planetary gearset, a first rotation transmission arranged at an intermediate output of the first gearset, a second rotation transmission arranged at an intermediate input of the second gearset, a first intermediate shaft arranged in one of the first and second transmissions, a first electric compression brake acting on the first intermediate shaft and capable of modifying a rotational speed thereof, a computer electrically connected to the first compression brake, and an electrical connection capable of being provided between the first compression brake and a second compression brake whereof the effect is to accelerate the second intermediate shaft by the braking effect exerted on the first intermediate shaft by the first compression brake.

Abstract: A six-speed transmission includes an input shaft, an output shaft, and a planetary gear arrangement having first, second and third planetary gear sets, each planetary gear set having first, second and third members. First and second interconnecting members continuously interconnect members of the planetary gear sets. The six torque-transmitting mechanisms are engaged in combinations of two to establish six forward speed ratios and at least one reverse speed ratio between the input shaft and the output shaft. The second and third sun gears hold the reaction torque in the first through fourth speeds, resulting in low planetary gear loading, which provides small gear sets, reduced clutch loading, reduced internal speeds, and low losses.

Abstract: A multi-speed transmission assembly for a rotary power tool. The transmission assembly includes a plurality of transmission stages, with at least two of the transmission stages employing a movable reduction element that permits the transmission stage to be operated in an active mode and an inactive mode. The movable reduction elements are coupled to a switching mechanism that switches the reduction elements in a predetermined manner to provide at least three-gear reduction or speed ratios.

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

Abstract: A control system and control method for an automotive vehicle having a multiple-ratio automatic transmission having two gearsets arranged in series relationship for delivering vehicle engine power to vehicle traction wheels, each gearset being controlled using friction elements that establish multiple torque flow paths, each gearset being characterized by at least two ratios, which define an overall transmission ratio, synchronous shifting of the gearsets effecting at least one swap-upshift and at least one swap-downshift in the overall transmission ratio, the control system compensating during a swap-shift progression for dynamic interaction between the gearsets.

Abstract: A continuously variable transmission apparatus, has: an input shaft; a toroidal-type continuously variable transmission; a first rotation transmission shaft; a first planetary-gear-type transmission; a second planetary-gear-type transmission; a second rotation transmission shaft; an output shaft; a first power transmission mechanism; a second power transmission mechanism; and a switching mechanism, wherein, in a state where the power transmission through the first power transmission mechanism is allowed and the power transmission through the second power transmission mechanism is cut off, in accordance with the control of the transmission ratio of the toroidal-type continuously variable transmission, the output shaft be stopped while leaving the input shaft rotating.

Abstract: A drivetrain for a vehicle includes front and rear axles and a transfer case including two planetary gear sets and four clutches. The first member of the first planetary gear set is continuously connected with the first member of the second planetary gear set and the rear axle. The third member of the first planetary gear set is continuously connected to the second member of the second planetary gear set and the front axle through a transfer chain. An input is selectively connectable with the first member of the first planetary gear set through a first clutch, connectable with the second member of the first planetary gear set through a second clutch, and connectable with the third member of the first planetary gear set through a third clutch. A fourth clutch selectively connects the third member of the second planetary gear set with ground.

Abstract: A differential power coupling for generating forward and reverse motions and allowing stopping of the rotation for a vehicle using a rotational power supply to power a variable speed transmission having first and second outputs. The power coupling uses a rotational outside gear with an outside face coupled to the first power supply, a rotational support body coupled to the second power supply and adapted to rotate axles of differential gears around a central axis, and at least one differential gear rotationally mounted on the axle attached to the rotational support body and coupled to the inside face. The differential gear is further coupled to the output shaft and adapted to create a fully variable rotation of the outputs shaft including forward, reverse and stopped rotation.

Abstract: A transfer case is provided for a vehicle having front and rear axles. The transfer case includes a planetary gear set with first, second and third members. The first member is continuously connected with the front axle and the second member is continuously connected with the rear axle. An input shaft is selectively connectable with the first, second or third member. The transfer case provides rear-wheel drive when the second member is connected with the input shaft, all-wheel drive when the third member is connected with the input shaft, and front-wheel drive when the first member is connected with the input shaft. It is important that the specific members of the planetary gear set be chosen so the absolute value of the torque of the third member is equal to the sum of the absolute value of the torques of the first and second members.

Abstract: A multi-speed transmission with an input shaft (1) and an output shaft (2) with two spur gear speeds (ST1, ST2) that are connected tightly on the input side with the input shaft (1) and generate two output rotational speeds (n1, n2), with a main gearset that is connected with the output shaft (2) and is constructed as a two webbed four shaft transmission with two coupled, shiftable planetary gearsets (RS1, RS2) to which the output rotational speeds (n1, n2) of the spur gear speeds (ST1, ST2) are transferable through several shifting elements (A to E) through their selective closing to the clutch of at least six forward gears and can be shifted without group shifting. A total of six shifting elements (A to F) are provided. The output rotational speed (n1) of the first spur gear speed (ST1) is transferable through the sixth shifting element (F) to the second shaft of the main gearset, and at least eight forward gears and maximally two reverse gears are shiftable.

Abstract: A gearbox unit having an input and output, first and second superposition gears designed as three-shaft planetary gears wherein the first shafts of the first superposition gears are connected against torsion with the input on the second shafts of the superposition gears are connected and secured against torsion with the gear output. A variable change-speed gear is arranged between the third shafts of the superposition gears and a mechanism provided for controlling the speed ratio thereof. The first and second planet wheels of one of the superposition gears mesh in pairs with each other and one of the wheels meshes with the ring gear. The second planet wheel meshes with the first planet wheel and with the sun gear. The other of the two superposition gears has individual planet wheels between the respective sun wheel and ring gear.

Abstract: An automatic speed change apparatus including an input shaft, an intermediate shaft and an output shaft arranged in parallel. The input shaft is coupled to the intermediate shaft by counter gear sets providing first, second and third drive paths. The input shaft is provided with clutches for engaging or disengaging the second and third drive paths and with a brake. The intermediate shaft is provided with a clutch, a brake and a one-way clutch for engaging, disengaging or braking the first and third drive path and with planetary gear sets. The first drive path is coupled to a ring gear, the second drive path is coupled to sun gears, and the third drive path is coupled to a planetary carrier. A planetary carrier and a ring gear are connected to the intermediate shaft, and the intermediate shaft is coupled to the output shaft by a fourth counter gear set.

Abstract: A planetary gear drive includes a thin, elastically resilient internal gear arranged within an annular housing, in which there is also a carrier that is rotatably supported by a pair of tapered roller bearings. A sun gear located concentrically within a cylindrical portion of the carrier is arranged so that the sun gear is capable of floating movement perpendicular to the drive axis. Any uneven meshing caused by error in the assembly or manufacture of the gears is automatically cancelled by radial elastic deformation of the internal gear and the floating movement of the sun gear, reducing backlash. Moreover, the use of two tapered roller bearings makes it possible to increase the moment capacity of the planetary gear drive.