Abstract: Systems and methods for operating a driveline system are disclosed and include a step-variable transmission. A continuously variable transmission (CVT) is coupled between an input source and the step-variable transmission. The CVT receives a first torque from the input source and outputs a second torque. The CVT has a plurality of planetary members in rolling contact with an inner race and an outer race. A radial distance between the planetary members and a drive-transmitting member corresponds to a transmission ratio of the CVT.

Abstract: A continuously variable transmission includes an input disk and output disk rotatable about a disk axis of rotation. An input ring member rotatable about an input axis of rotation engages the input disk at an input contact patch. An output ring member rotatable about an output axis of rotation engages the output disk at an output contact patch. A sum of a length of a first input contact patch vector extending from the input contact patch to the disk axis of rotation and a length of a first output contact patch vector extending from the output contact patch to the disk axis of rotation is greater than a length of at least one of a second input contact patch vector extending from the input contact patch to the input axis of rotation and a second output contact patch vector extending from the output contact patch to the output axis of rotation.

Abstract: In order for it to be also possible to transmit relatively high torques in an operationally reliable manner with low power loss and with a low or inexpensive design outlay in a bevel friction ring gear mechanism, consisting of at least two component transmissions which are configured as bevel friction ring gear mechanisms and have a first adjusting device for a friction ring of the first component transmission and a second adjusting device for a friction ring of the second component transmission, wherein the bevel friction ring gear mechanism has a regulating device for regulating an axial position of the friction rings, it is proposed that the regulating device has at least one first part regulating device with a first reference variable and a second part regulating device with a second reference variable which is separate from the first reference variable, wherein the first component transmission has the first part regulating device for regulating the position of the friction ring of the first component tra

Abstract: Embodiments are directed to a front end accessory drive (FEAD) and power modulating devices (PMD) which can be used in a FEAD. In one embodiment, a continuously variable transmission (CVT) is coupled directly to a crankshaft of a prime mover, and the CVT is used to regulate the speed and/or torque delivered to an accessory. A compound drive device includes a motor/generator subassembly cooperating with a CVT subassembly to provide a motor functionality with torque multiplication or division, or alternatively, a generator functionality with torque multiplication or division. In some embodiments, a FEAD includes a PMD having a sun shaft configured to couple to a sun of the PMD and to an electric motor component, such as an electrical armature or an electrical field. In one embodiment, the electrical armature the electrical field are placed concentrically and coaxially and configured to rotate relative to one another in opposite directions.

Abstract: A continuously variable gear can include an input shaft, a plurality of traction balls distributed radially around the axis, each traction ball is mounted on an axle passing there through, the axles are tiltable in the radial grooves in the housing and support plate. To control the position of the traction balls, the axles are guided in curved slots of a turnable iris plate. To control the axial placement of the traction balls, there is a rotatable input disc positioned adjacent to the traction balls, a rotatable output disc positioned adjacent to the traction balls opposite the input disc, and a pre-spanning ring around the traction balls such that each of the traction balls is making three-point contact with the input disc, the output disc and the pre-spanning ring, the contact surface of the pre-spanning ring having a specific curvature larger than the radius of the traction balls.

Abstract: A transmission is provided. The transmission includes an input portion drivingly engaged with a power source, a planetary gear, a continuously variable variator, and a clutching device. The planetary gear arrangement has a portion drivingly engaged with the input portion. The continuously variable variator includes a portion which is drivingly engaged with at least one of the planetary gear arrangement and the input portion. The clutching device may be selectively drivingly engaged with a portion of the continuously variable variator. The clutching device and the planetary gear arrangement facilitate a transition between at least two operating modes of the continuously variable variator.

Abstract: A system has a pump with a power input, a power source and a continuously variable transmission (CVT) coupled to the power source and to the power input of the pump. The CVT transmits power from the power source to the pump. The CVT comprises a plurality of planetary members in rolling contact with an inner race and an outer race. A radial distance between the planetary members and a drive-transmitting member corresponds to a transmission ratio of the CVT.

Abstract: A friction-plate lubricating device for an automatic transmission that includes a friction engagement element with a plurality of friction plates in which outer friction plates and inner friction plates are alternately disposed; a hub with splines engaged with teeth formed on an inner circumference of the inner friction plates, the hub having the splines on an outer circumference thereof and having uneven portions formed on an inner circumference thereof; and a nozzle that discharges lubricant to the uneven portions. Recesses of the uneven portions serve as oil reservoirs in which the lubricant gathers, and through-holes are formed in bottom surfaces of the recesses. The lubricant discharged from the nozzle is collected in the oil reservoirs formed by the recesses so as to be supplied to the plurality of friction plates of the friction engagement element through the through-holes.

Abstract: A method for controlling a coast down downshift that is produced in an automatic transmission by disengaging an off-going control element and engaging an oncoming control element, including the steps of determining a first desired pressure magnitude of the off-going control element and a first desired pressure magnitude of the oncoming control element, executing the current downshift using said first desired pressure magnitudes, determining during execution of the current downshift corrections of said first desired pressure magnitudes that occur during the current downshift, determining a second desired pressure magnitude of the off-going control element and a second desired pressure magnitude of the oncoming control element, using said corrections and the second desired pressure magnitude to determine a subsequent desired pressure magnitude of the off-going control element and a subsequent desired pressure magnitude of the oncoming control element, and executing a downshift using said subsequent desired pres

Abstract: System comprising an epicyclic arrangement. In some embodiments, the epicyclic arrangement can comprise: a first input element; a second input element fixed to an input drive shaft; a carrier that includes at least a portion that is disposed axially between the first and second input elements, the carrier being connected to an output member; and planets associated with the carrier. Some embodiments of the present systems comprise a housing in which the epicyclic arrangement is disposed; and/or fluid contained within the housing.

Abstract: Inventive embodiments are directed to components, subassemblies, systems, and/or methods for continuously variable accessory drives (CVAD). In one embodiment, a skew-based control system is adapted to facilitate a change in the ratio of a CVAD. In another embodiment, a skew-based control system includes a skew actuator coupled to a carrier member. In some embodiments, the skew actuator is configured to rotate a carrier member of a CVT. Various inventive traction planet assemblies can be used to facilitate shifting the ratio of a CVT. In some embodiments, the traction planet assemblies include legs configured to cooperate with the carrier members. In some embodiments, a traction planet assembly is operably coupled to the carrier members. Embodiments of a shift cam and traction sun are adapted to cooperate with other components of the CVT to support operation and/or functionality of the CVT. Among other things, shift control interfaces for a CVT are disclosed.

Abstract: A medium pressure control device of a continuously variable transmission includes a pump unit capable of switching a discharge volume of an operating medium to a control system, which controls a contacting surface pressure of rotation members and a transmitting member and the transmission ratio by a pressure of the operating medium, in plural stages; and a transmission ratio control unit that controls the control system and relatively delays a transmission shift when the discharge volume of the operating medium to the control system by the pump unit switches from a relatively small volume to a relatively large volume with the transmission shift.

Abstract: A power-branched transmission, particularly for agricultural vehicles such as tractors or similar, includes a stepped planetary gear which is disposed between an input shaft and an output shaft and is used for dividing the power supplied at the input shaft onto a mechanical power branch and a hydraulic power branch. The hydraulic power branch is formed by two hydraulically interconnected, identical hydrostatic axial piston engines which can be selectively operated as a pump or an engine, can be swiveled within a predefined pivoting angle, and can be connected to the input shaft or the stepped planetary gear in a different manner via two respective clutches so as to cover different operating ranges or running steps. In order to obtain better efficiency in such a power-branched transmission, the two hydrostatic axial piston engines are configured as wide-angle hydrostats that are provided with a minimum pivoting angle range of 45°.

Abstract: A shift control system of an automatic transmission and a method thereof include controlling the off-going and on-coming clutches according to hydraulic pressures of the off-going and on-coming clutches calculated based on a flare amount when a flare occurs, controlling the on-coming clutch according to hydraulic pressure of the on-coming clutch calculated based on a shifting time interval when the flare does not occur and the shifting time interval is smaller than or equal to a predetermined time interval, and controlling the off-going and on-coming clutches according to hydraulic pressures of the off-going and on-coming clutches calculated based on an excess rate of change of a turbine speed when the shifting time interval is larger than a predetermined time interval.

Abstract: An automatic stepless transmission includes a driving shaft, a driving disk rotatable by the driving shaft, and a clutch assembly rotatable by the driving disk. Two parallel guiding slots are provided on the driving shaft. An eccentric plate with a notch is sleeved onto the driving shaft. A compressible resilient regulation mechanism is disposed between the notch and the driving shaft. The driving disk is installed on the eccentric plate via a bearing. The eccentric plate offsets in relation to the axis of the driving shaft, and at the same time the eccentric plate drives the driving disk offset. The automatic stepless transmission can compress or release the resilient regulation mechanism according to loads. The eccentricity between the eccentric plate and the driving shaft can therefore be adjusted, and the eccentric plate can drive the driving disk to move. Thus, the eccentricity of the driving disk can be regulated without manual work. The transmission has a simple structure and can be operated easily.

Abstract: A planetary roller transmission device has a rotatable input shaft and an output shaft on the same axis, a plurality of planetary rollers which are rollable around the outer periphery of a sun roller provided on the input shaft, an output ring which is provided integrally with the output shaft, inside which the planetary roller roll, and a shift ring which is provided to be movable in only along the axis and with which the planetary roller internally and rollably contacts. The position at which the sun roller contacts the planetary rollers by pressing the planetary rollers in an outer direction is located between a first position at which the output ring contacts the planetary roller, and a second position at which the shift ring contacts the planetary roller. The planetary roller transmission device also has an axial direction pressing member which moves along the axis due to a centrifugal force caused by the rotation of the input shaft.

Abstract: An automated clutch system for transferring torque from an engine to a change gear transmission is connected to a processing unit which uses various input parameters to calculate the grade on which the vehicle is operating and its current weight to determine an appropriate start gear to minimise clutch slip when the vehicle is launched from rest.

Abstract: A hydraulic control circuit is disclosed for a continuously variable transmission comprising a continuously variable ratio transmission unit (“variator”) 10, the circuit comprising a supply line 106 and means (which may take the form of a pump 110) for providing a flow of pressurised fluid in the supply line, means (which may comprise a pressure control valve 116) for generating a back pressure in the supply line, and at least one connection for feeding fluid from the supply line to a hydraulic actuator 100 acting on a movable torque transmission 23-37 element (which may comprise a roller 28) of the variator 10. The valve means 152 connected to the supply line allows pressure in the supply line to be selectively modified in response to rate of flow in the supply line.

Abstract: A hydraulic ram unit for a transmission of the toroidal-race, rolling-traction type. The ram is connected to the rollers of the transmission so that the position of the ram within its stroke is related to the angular setting of the rollers and so to the transmitted ratio. The ram pistons move within cylinders the inlet and outlet ports of which are located in the cylinder end walls, with the outlet ports axially protruding of the inlet ports. If a piston overshoots its normal stroke it tends first to restrict flow through the outlet port and then to contact and obstruct it, so creating firstly hydraulic and then contact forces to resist further overshoot, without substantially restricting the inlet port. Novel construction for the ram itself, and for the ram cylinders and casing are also described.

Abstract: A hydraulically, vacuumatically controlled infinitely variable speed drive transmission connecting an input shaft to an output shaft, comprising a plurality of sets of adhesion rollers mounted radially of the input and output shafts in diammetrically opposed relation to one another. The adhesion rollers are movable radially of input and output shafts under centrifugal force imparted thereto by the rotation of the aforesaid shafts. A pair of self-adjusting, floating disks are mounted to either side of said adhesion rollers and are engageable with said rollers at varying radial distances of the rollers from the axis of the input and output shafts whereby to vary the rate of rotation of said disks. The transmission further includes a planetary gear arrangement for coupling the input shaft to the output shaft and which is responsive to variations in the rate of rotation of the disks to cause the speed ratio between the input and output shafts to correspondingly vary.