Abstract: A plate-link chain, in particular a toothed plate-link chain, made up of a plurality of plates that form sets of plates which are connected to neighboring sets of plates with a hinged connection. One rocker member of a hinged connection is connected to the plates of a set of plates through a connection opening, and two rocker members of neighboring sets of plates form the hinged connection. The rocker members can roll against each other at a roller profile, and the set of plates includes at least one guide plate. The rocker member includes a guide profile that is connected to a rocker profile through a first connecting profile and a second connecting profile. The guide plate has at least one connection opening which has an undercut or recess in the region of the first and/or second connecting profile.

Abstract: A power-split transmission having several ranges of transmission ratios with continuously variable speed reductions. A drive shaft is connected to two shafts of a variable speed drive unit via a distributor gear whose shafts are in turn connected with the input shafts of a parallel gearbox via respective clutches. Two ranges of ratios only differ from each other through the reduction of the input shaft of the parallel gearbox and their output shafts. An additional embodiment includes a variable speed drive unit, a first planetary drive that is connected with a drive shaft, an input shaft of the variable speed drive unit and a connecting shaft, as well as a second planetary drive that is connected with the connecting shaft of the output shaft of the variable speed drive unit, and an output shaft and an electric motor that is nonrotatably connected with the connecting shaft.

Abstract: A continuously variable power-branched transmission for a motor vehicle, including an input shaft, a variable speed drive unit having pairs of conical disks and a continuously variable transmission ratio, a gear system, and an output shaft. Two control clutches connect the variable speed drive unit and the gear system so that when going through the entire transmission ratio range of the power-branched transmission the adjustment range of the variable speed drive unit is passed through a plurality of times. The transmission also includes rotational speed sensors and a controller that determines whether a change in rotational speed is triggered by a change in the transmission ratio, and when it is not triggered by a change in the transmission ratio, the controller adjusts the variable speed drive unit so that the change in rotational speed not triggered by a change in the transmission ratio is compensated.

Abstract: A plate link chain for a motor vehicle drive system. A number of link plates are hingedly connected by pairs of rocker members that extend transversely to the longitudinal direction of the chain. Curved contact surfaces are located on each of the rocker members and link plates, along which contact surfaces the rocker members and link plates contact each other to transmit power. The rocker members also include curved pitch surfaces along which rocker member pairs roll against each other to transmit power. The rocker members are shaped asymmetrically in the height direction and about a cross section plane extending in the longitudinal direction of the chain. Contact surfaces are provided on each of the upper and lower contact surface areas in the height direction of the rocker members.

Abstract: A drive train of a motor vehicle with an internal combustion engine, a torque converter and a transmission, wherein a separation clutch is provided between the internal combustion engine and the torque converter. In order to be able to perform a creeping process at a certain creeping velocity, the separation clutch is operated slipping. This way, the gearing of the startup process can be configured long, even when using a so-called hard torque converter, without having to tolerate a creeping velocity, which is too high.

Abstract: The input rotational speed of a belt-driven conical-pulley transmission is determined by measuring a wheel rotational speed and the transmission ratio and by calculating the input rotational speed therefrom. In order to ascertain the slipping of a CVT transmission, the rate of change in the transmission ratio is drawn upon, or an acoustic parameter of the transmission is used. In the fluid control system, a valve is used whose opening cross-section is controlled according to the one differential pressure. In order to oil the conical discs, injection holes of an injection tube are used that passes through a slot provided in a slide rail resting against a strand of a flexible torque transmitting member of a conical disc flexible drive.

Abstract: A power-branched continuously variable transmission having an input shaft and an output shaft, and a power divider transmission that divides the torque of the input shaft between two torque transmission paths. One path is connected to the output shaft. A variable speed drive unit connects the transmission paths with each other, and a start-up converter is located in one of the torque transmission paths between the power divider transmission and the variable speed drive unit.

Abstract: A method for regulating or controlling the transmission ratio of an automatic power-branched transmission. Power is transmitted through a shaft driven by an engine, a variable speed drive, a gear transmission, a driven shaft, and at least two control clutches. The variable speed drive and the gear transmission are connected to each other in such a way that the regulating range of the variable speed drive is traversed in one direction within a first range of transmission ratios, and is traversed in the opposite direction within a second range of transmission ratios during traversing of the entire range of transmission ratios. The shifting strategies result in reduced wear of the endless belt device and allow for comfortable changing between the transmission ratio ranges.

Abstract: A hydraulic system including a multi-flow hydraulic pressure supply unit, especially a dual-flow hydraulic pressure supply unit, such as a pump, by which a volumetric flow of pressurized fluid is supplied to a hydraulic-fluid-operated device. A valve arrangement is provided either for switching between the individual pump flows or for interconnecting the individual pump flows.

Abstract: A hydraulic system including a multi-flow hydraulic pressure supply unit, especially a dual-flow hydraulic pressure supply unit, such as a pump, by which a volumetric flow of pressurized fluid is supplied to a hydraulic-fluid-operated device. A valve arrangement is provided either for switching between the individual pump flows or for interconnecting the individual pump flows.

Abstract: A power-split transmission having several ranges of transmission ratios with continuously variable speed reductions. A drive shaft is connected to two shafts of a variable speed drive unit via a distributor gear whose shafts are in turn connected with the input shafts of a parallel gearbox via respective clutches. Two ranges of ratios only differ from each other through the reduction of the input shaft of the parallel gearbox and their output shafts. An additional embodiment includes a variable speed drive unit, a first planetary drive that is connected with a drive shaft, an input shaft of the variable speed drive unit and a connecting shaft, as well as a second planetary drive that is connected with the connecting shaft of the output shaft of the variable speed drive unit, and an output shaft and an electric motor that is nonrotatably connected with the connecting shaft.

Abstract: A planetary transmission having a continuously variable transmission ratio. Two sun wheels with sun wheel outer circumferential surfaces are rotatable coaxially at different rotational speeds and coaxially spaced from each other. A ring wheel is coaxial with the sun wheels and has a radially inner circumferential surface. Planet wheels having planet wheel outer circumferential surfaces are in frictional contact with the ring wheel inner circumferential surface and the sun wheel outer circumferential surfaces. The sun wheel outer circumferential surfaces, the planet wheel outer circumferential surfaces, and the ring wheel inner circumferential surface are so shaped that when there is axial displacement of the ring wheel relative to the sun wheels, tilting of the axes of rotation of the planet wheels relative to the axis of rotation of the sun wheels occurs. The transmission ratio between the sun wheels changes in opposite directions.

Abstract: A plate-link chain for a motor vehicle drive system. The chain includes a number of link plates hingedly connected with each other by rocker members that extend transversely to the longitudinal direction of the plate-link chain and are positioned in openings of the link plates. Curved contact surfaces are located on each of the rocker members and link plates, along which contact surfaces the rocker members and link plates are in contact with each other to transmit power. The rocker members are shaped asymmetrically in the height direction and are provided in contacting pairs. The link plate openings include at least one inwardly-curved region that is located above a contact point line extending through contact points of contacting rocker members of adjacent rocker member pairs that roll against each other.

Abstract: A plate-link chain for a motor vehicle drive system including conical pulleys. The chain includes a number of link plates hingedly connected with each other by rocker members. The rocker members extend transversely to the longitudinal direction of the plate-link chain and are situated in openings in the link plates. The rocker members have end faces for frictional contact with conical surfaces of disks of a belt-driven conical-pulley transmission, and the rocker member end faces are configured so that contact between the rocker member end faces and the conical surfaces of the disks takes place in the upper region of the end faces, relative to the height direction of the rocker members.

Abstract: A plate-link chain for a motor vehicle drive system including conical pulleys. The chain includes a number of link plates hingedly connected with each other by rocker members. The rocker members extend transversely to the longitudinal direction of the chain and within openings in the link plates. The rocker members and link plates bear against each other along curved contact surfaces to transmit power. Rocker member pairs roll against each other on facing curved rolling surfaces at a contact point that moves from an upper area above the center of mass of the rocker member cross section to a lower area below it. The ratio of the distance from the end of the upper area to the center of mass and the distance from the end of the lower area to the center of mass lies in a range of from about 1.1 to about 2.

Abstract: A branched power transmission having several transmission ratio ranges with a steplessly adjustable transmission ratio. A drive shaft is connected to both shafts of a variable speed unit through a distributor transmission, which shafts in turn are connected with the input shafts of a parallel gearbox through respective clutches. Two transmission ratio ranges differ from each other through the transmission ratio of an input shaft of the parallel gearbox and its output shaft. Additionally, the power-producing transmission can include an electrical machine. A further embodiment includes a variable speed unit, a first planetary transmission connected with a drive shaft, the input shaft of the variable speed unit and a connecting shaft, and a second planetary transmission that is connected with the connecting shaft of the output shaft of the variable speed unit and an output shaft, and an electrical machine that is non-rotatably connected with the connecting shaft.

Abstract: A continuously variable power-branched transmission for a motor vehicle, including an input shaft, a variable speed drive unit having pairs of conical disks and a continuously variable transmission ratio, a gear system, and an output shaft. Two control clutches connect the variable speed drive unit and the gear system so that when going through the entire transmission ratio range of the power-branched transmission the adjustment range of the variable speed drive unit is passed through a plurality of times. The transmission also includes rotational speed sensors and a controller that determines whether a change in rotational speed is triggered by a change in the transmission ratio, and when it is not triggered by a change in the transmission ratio, the controller adjusts the variable speed drive unit so that the change in rotational speed not triggered by a change in the transmission ratio is compensated.

Abstract: A plate-link chain for a motor vehicle drive system. The chain includes a plurality of link plates articulatingly connected with each other by rocker members. The rocker members extend transversely to the longitudinal direction of the plate-link chain. The chain includes curved contact surfaces formed on the rocker members and on the link plates, along which the rocker members and link plates are in contact with each other to transmit force. The respective contact surfaces have a width that extends transversely to the longitudinal direction of the plate-link chain, and when considered in a side view running transversely to the width and in the longitudinal direction of the plate-link chain, they have an arc length. The contact surfaces have at least three regions along the arc length with different curvatures.

Abstract: A plate-link chain for a motor vehicle drive system. The chain includes a number of link plates hingedly connected with each other by rocker members that extend transversely to the longitudinal direction of the plate-link chain and are positioned in openings of the link plates. Curved-shaped contact surfaces are located on each of the rocker members and link plates, along which contact surfaces the rocker members and link plates are in contact with each other to transmit power. The rocker members are shaped asymmetrically in the height direction of the rocker members, relative to a cross section extending in the longitudinal direction of the plate-link chain. The link plate openings include at least one region that is curved in an inward direction, to prevent incorrect orientation of the rocker members during assembly of the chain.

Abstract: A method for altering the coupling torque of a coupling in the drive train of a vehicle with an automatic gearbox and/or automatic coupling in a creep drive mode of a vehicle. According to the invention, the coupling torque is altered according to at least one variable, the parameter of the vehicle describing the creep drive mode thereof.