Abstract: A thrust plate assembly having a housing which can be fastened to a flywheel for common rotation about an axis of rotation. A pressure plate is axially displaceable in the housing and is fixed with respect to rotation relative to the housing and is pressed in the direction of the flywheel by an energy accumulator. A wear adjustment device, with at least one adjustment element which is pretensioned in a wear adjustment direction, is arranged in the support path of the energy accumulator. Further, at least one play sensor arrangement is provided for detecting wear occurring during operation. The at least one play sensor arrangement has a locking element with a counter-engagement formation engaging with the engagement formation at the at least one adjustment element. Further, the locking element has a locking engagement formation which engages or is engageable in a detachable manner with a counter-locking engagement formation, the latter preferably being stationary with respect to the pressure plate.

Abstract: A method for manufacturing a piston, wherein the piston includes a piston body with through-channels for fluid which are covered by valve disks on supporting bodies with valve support surfaces. The piston body is constructed in one piece in a disk-shaped manner by press stamping. Starting from a base body of the piston, the raised areas of the piston body on one side of the piston are formed as depressions on the axially opposite side. The piston has at least one support for the valve disks whose axial height is adapted to the height of the support surfaces. The support on both sides of the piston is stamped from the base body of the piston and the valve support surfaces and the support are machined in the same manufacturing step on a common plane.

Abstract: A hydrodynamic coupling device includes an impeller wheel with an impeller shell and a vane arrangement and a turbine wheel with a turbine shell and vane arrangement. The vane arrangements of the impeller wheel and the turbine wheel form a hydrodynamic circuit. A lockup clutch is constructed with an axially movable piston for transmitting torque by the application of pressure in the direction of a primary flange of a clutch housing via at least one friction facing provided axially between the piston and the primary flange. The lockup clutch has a torsional vibration damper with a drive-side transmission element and a driven-side transmission element which is movable relative to the latter, each of which is provided with driving means for elastic elements.

Abstract: A clutch disk for a motor vehicle, in which a centering force is applied between the input parts and the output parts in operating states in which the input parts, relative to the output parts, carry out a wobbling movement or undergo a radial displacement, a spring element arranged between one cover plate and the hub disk and which is centered directly or indirectly at the cover plate or hub disk. A bearing ring is arranged with an outer contour between the spring tongues and the bearing region of the hub. The inner contour of a structural component part of the one coverplate is arranged at a distance from this outer contour for determining the movement play of the spring tongues of the spring element.

Abstract: A vibration damper with variable damping force, including a cylinder, a piston and a piston rod arranged in the cylinder so as to be axially movable, an adjustable damping valve connected between the piston rod and the cylinder, and controlled as a function of a spring deflection path, a device for controlling the adjustable damping valve, and additional damping valves arranged to have a damping effect on the piston independent of the controlling device.

Abstract: An actuating drive for actuating a friction clutch and an automated shift transmission, having valve units which enable a switching operation, on the one hand, of the friction clutch, and on the other hand, of the shift transmission. It is possible for a change to the switching state at the friction clutch to be triggered by a gear selection device. The valve unit that is assigned to the friction clutch is assigned a switching device which has a link between the actuating cylinder for the slot selection and the hydraulic circuit that is connected to the actuating cylinder for actuating the friction clutch and enables the driving, as required, of one or the other actuating cylinder.

Abstract: A flywheel arrangement with a drive-side transmission element and a driven-side transmission element which is rotatable relative to the drive-side transmission element includes at least one annular added mass fastened to at least one of the transmission elements. In order to produce the added mass, a blank formed from strip material is shaped in its longitudinal direction to form a ring, so that the corresponding ends of the blank are directed toward one another with a predetermined intermediate gap and are fixed in this position relative to one another by a retaining mechanism.

Abstract: A torsional vibration damper having a plurality of transmission elements which are rotatable relative to one another about a common axis of rotation. A movement which is conducted to one of the transmission elements can be conducted to the other transmission element by a coupling device which acts in an articulated manner at one of the transmission elements via at least one coupling member. Further, at least one guide path is associated with the coupling device in at least one other transmission element. A thrust element connected with the coupling member for transmitting a movement with a component in the circumferential direction to the transmission element can be guided along this guide path.

Abstract: A hydrodynamic coupling device includes a hydrodynamic circuit having at least an impeller wheel and a turbine wheel and a lockup clutch having an axially movable piston and a torsional vibration damper. The torsional vibration damper has a drive-side transmission element and a driven-side transmission element which is rotatable relative to the latter, each of which is provided with driving means for elastic elements of the torsional vibration damper. A first driving device is provided at a radial outer area of the turbine wheel. For an arrangement of the elastic elements substantially radially outside of the impeller wheel, the first driving device extends beyond this impeller wheel. The second driving device has at least one area radially outside of the elastic elements which receives a friction facing or which serves as a friction surface for the friction facing.

Abstract: A hydrodynamic torque converter with a converter circuit comprising an impeller, a turbine and a stator, wherein the stator is held by an axial bearing arrangement in the converter housing at a predetermined relative distance from the impeller and the turbine. The axial bearing arrangement has a grooved sliding bearing at each axial side of the stator. In at least one of the sliding bearings, the grooves are formed through only a part of the entire radial length of the sliding bearing.

Abstract: A friction clutch with at least one flywheel mass and a clutch housing with which there is associated a pressing arrangement for a pressing plate which is provided for the action of pressure on one side of a clutch disk the opposite side of which is supported on a counter pressure surface. Furthermore, a disengager is provided by which, upon its movement, the pressing arrangement can be functionally connected with or separated from the clutch disk. The disengager is connected by a disengagement mechanism to the pressing plate by which the movement of the disengager can be transformed into an axial movement of the pressing plate.

Abstract: A torque converter has a converter housing which is connectable with a drive shaft, a turbine wheel having a turbine wheel shell and a turbine wheel hub arranged in the converter housing so as to be rotatable about an axis of rotation and which is connectable with a converter driven shaft. A lockup clutch is provided for optional coupling of the turbine wheel with the converter housing. A torsional vibration damper arrangement in a force flow path between the converter housing and the turbine wheel hub, includes the following: a first transmission arrangement, a and second transmission arrangement rotatable about the axis of rotation with and with respect to the first transmission arrangement and with respect to the first transmission arrangement, a coupling arrangement having a torque-transmitting connection with the first transmission arrangement by a first coupling area and a torque-transmitting connection with the second transmission arrangement by a second coupling area.

Abstract: A torque converter having a fluid vibration damping arrangement (70) for damping torsional vibrations which lead to relative torsion between an input and an output side of the torsional vibration damper by means of fluid contained in the interior (24) of the casing (12). The fluid vibration damping arrangement is implemented by at least one first blade-like projection, which is coupled in a rotationally fixed manner to a turbine impeller shell (28) of the turbine impeller (26), and extends substantially axially away from said shell and toward the clutch element (44), and at least one second blade-like projection, which is coupled in a rotationally fixed manner to the clutch element (44), preferably attached to the latter, and extends substantially axially away from the latter and toward the turbine impeller (26). The at least one first blade-like projection (74) and the at least one second blade-like projection (72) overlapping in the axial direction in certain regions.

Abstract: A torsional vibration damper is provided with a drive-side transmission element which engages with a driven-side transmission element via a planetary gear set. The planetary gear set includes a planet wheel mounted on a planet carrier. The planet wheel engages another element of the planetary gear set such as a ring gear. The planet wheel has a toothing at its outer circumference which engages a toothing of the ring gear. The toothing of at least one of the planet wheel and the ring gear is made from a material which obviates the requirement of lubricating the toothing engagement between the planet wheel and the ring gear.

Abstract: A process for manufacturing a molded piston ring for a piston in a piston-cylinder unit from a material which can be molded in a master mold. The surfaces of the piston in contact with the piston ring are provided with a separating agent which substantially prevents adhesive contact between the piston and piston ring. The piston is placed in the master mold including a shaping piece which at least partially contacts the circumferential surface of the piston. As a result of piston ring material being pressed in at the contact point or contact points of the shaping piece an expansion zone is formed at the piston which is free from the piston ring material.

Abstract: A quick fastener for mounting a hydraulic cylinder to a casing, whereby the hydraulic cylinder has a fastening device, and the casing has mounting structures in the casing wall. The mounting structures act in concert with the fastening device so that the hydraulic cylinder can be mounted to the casing wall without using tools. The fastening device includes primarily a fastening nose and a catch spring with a catch nose, as well as, a stop collar or groove. The mounting structures include at least one opening in the casing wall that have contours into which the fastening nose as well as the catch spring with the catch nose can be inserted. The advantage of this quick fastener lies in the simple sealing of the chambers on both sides of the casing wall, with a simple assembly, by inserting, in the direction of the axle of the hydraulic cylinder, and the swinging or positioning, as desired, of the hydraulic cylinder into the mounting position.

Abstract: An arrangement of foot operated elements for a motor vehicle includes a first element with a power booster for operating a brake and a second element with a second power booster for operating a clutch of the motor vehicle. The second power booster for actuating the clutch release is arranged adjacent the power booster for actuating the brake device. The power booster for the clutch has a linear guide which guides the second element, which is an actuating push rod by which the second power booster for the clutch can be operated directly. The second power booster for the clutch further has a servo device which further reduces the actuating forces and/or the operating paths for actuating the clutch.

Abstract: A hydrodynamic torque converter has a converter circuit which is formed of an impeller wheel, a turbine wheel and a stator wheel. A driver for a piston of a lockup clutch is provided at the turbine wheel. The piston is rotatable in the circumferential direction and displaceable in the axial direction. The driver has at least one projection projecting in the direction of an associated recess in the piston in order to produce a connection forming a positive engagement in the circumferential direction while allowing a relative movement of the piston in the axial direction. The projection has at least two legs which are arranged at a distance from one another and extend at a predetermined angle relative to the circumferential direction. These legs are connected with one another, at least at their free ends, by a stiffener and have transmission surfaces at their sides remote of the stiffener.

Abstract: The invention is directed to a plate clutch with improved heat removal characteristics. For this purpose, additional axial and radial aerating openings are arranged in the torque-transmitting teeth of the clutch housing.

Abstract: A torque converter comprises a converter housing that has a plurality of connection areas on one axial side. The converter housing is connectable in rotation-proof fashion relative to a crank shaft at connection points located in the connection areas. The converter housing has a plurality of radially extending hollows arranged in the circumferential direction at a distance from each other on the aforementioned axial side. A first distance between one of the hollows and the hollow directly adjacent to it in one circumferential direction is different from a second distance between the one of the hollows and the hollow directly adjacent to it in the other opposing circumferential direction.