Abstract: A torsional vibration damper for incorporation into the torque transmission path between two components or subassemblies, especially for a hydrodynamic coupling device, includes at least two disk-like damper members. Each damper member has a radially outward coupling region and a radially inward coupling region, and at least one deformation region extending between the radially outward coupling region and the radially inward coupling region. Each deformation region is elastically deformable at least in some areas to permit a relative circumferential movement between the radially outward coupling region and the radially inward coupling region.

Abstract: A suspension system for motor vehicles includes level regulation for adjusting a predetermined height of the vehicle body. At least one piston-cylinder unit of the suspension system includes a work cylinder, a piston rod and a damping piston having damping valves. A pump is arranged between an oil reservoir and the piston-cylinder unit via corresponding inlet and outlet lines.

Abstract: A pressure operated valve is provided including an adjusting device, a spring and a vent connection. The adjusting device is axially movably arranged in a pressure chamber defined in the valve and comprises a valve body and a pressure intensifier. A space between the valve body and valve face defines a valve passage cross section. The spring is operatively arranged for holding the pressure intensifier in a floating arrangement in the pressure chamber. The pressure intensifier has a first side exposed to a pressure in the pressure connection opening and a second side facing away from the pressure connection opening. The second side of the pressure intensifier and the adjusting device define a low pressure chamber within the pressure chamber. The vent connection is an inflow restrictor arranged between the lower pressure chamber and a space having a lower pressure than the low pressure chamber.

Abstract: The actuation device includes a pressure medium force cylinder arrangement by means of which the friction clutch can be actuated via a release member. A measuring member of a measuring arrangement detecting an actual release is in tractive force driving engagement with an associated mating member whose position represents the actual release along a measurement path, which engagement is essentially free from play.

Abstract: An actuation device for a friction clutch which is arranged in the drivetrain of a motor vehicle between a drive unit and a transmission arrangement includes a pressure medium force cylinder arrangement for actuating the friction clutch via a release member having a release bearing arrangement. A measuring arrangement detects an actual release state, i.e., an instantaneous position of the release member. A control/regulating valve arrangement is connected with a pressure medium source, a pressure compensation opening, and with the pressure medium force cylinder arrangement. The pressure medium force cylinder arrangement is actuated depending on the actual release state and on a desired release state.

Abstract: The friction clutch comprises a clutch disk arrangement which can be brought into frictional engagement with associated friction surfaces by the action of a movably mounted thrust plate arrangement. The actuation device includes a pressure medium force cylinder arrangement by means of which the friction clutch can be actuated by an actuating member; a measuring arrangement detects an actual actuation. A control/regulating valve arrangement is connected with a pressure medium source, with a pressure compensation opening or a pressure compensation reservoir and with the pressure medium force cylinder arrangement, by means of which control/regulating valve arrangement the pressure medium force cylinder arrangement can be actuated depending on the actual actuation and on a reference actuation which can be predetermined. According to one aspect of the invention the measuring arrangement detects an adjusting path of at least one thrust plate of the thrust plate arrangement as actual actuation.

Abstract: A hydraulically damping engine bearing includes fluid-filled chambers defined at least partially by an elastic wall. A dividing wall with a diaphragm divides the chambers. The diaphragm is deflectable in a limited manner and defines an intermediate space with the dividing wall. At least one channel is arranged through the dividing wall for connecting the chambers. A bearing characteristic is adjustable by changing the rigidity of the diaphragm such that the diaphragm works against a gas volume enclosed in the intermediate space when the diaphragm as a low rigidity and the diaphragm rests at least partially at a stop on the dividing wall when the diaphragm as a high rigidity. A switch is arranged for opening a flow connection to the atmosphere or a pressure accumulator for aerating the intermediate space.

Abstract: An actuation device for a friction clutch arranged in a drivetrain of a motor vehicle between a drive unit and a transmission in a housing having a pressure medium force cylinder arrangement arranged in the housing, which preferably comprises a pressure medium force ring cylinder. The friction clutch can be actuated by means of this pressure medium force cylinder arrangement via a release bearing arrangement which is movable coaxial to the friction clutch. A measuring arrangement associated with the release bearing arrangement or a release bearing arrangement side of the pressure medium force cylinder arrangement or friction clutch detects an actual release with a plurality of measurement receivers arranged in the housing so as to be distributed about the clutch axis.

Abstract: Torque transmission unit includes an input shaft and an output shaft with a torsion damping device functionally arranged between the input shaft and an output shaft. A shift clutch is also operatively arranged between the input shaft and the output shaft for selectively varying the torque transmitted from the input shaft to the output shaft. The torsion damping device has at least a primary mass and a secondary mass, the primary mass being effectively connected to the input shaft and the secondary mass being effectively connected to the output shaft. The torque transmission unit further comprises an electric machine with a stator and a rotor effectively connected to the input shaft. At least one of the shift clutch and the torsion damping device is arranged within an annular space delimited by the rotor and the stator of the electric machine.

Abstract: A coupling device is designed with a flywheel mass which faces a drive and is operatively connected, such that they rotate together, to a driver which acts on the drive. A holder is provided on the flywheel mass, which holder faces the driver and is provided with a tooth system. The driver has an axial attachment, which is likewise designed with a tooth system at its end which faces the holder, in which case at least one tooth of the tooth system is pressed, with radial prestressing, into the tooth gap between in each case two teeth of the tooth system of the holder.

Abstract: A fluid clutch includes a first transmission element and a second transmission element which is rotatable about an axis of rotation with respect to the first transmission element. Torque transmission surfaces of the first and the second transmission elements are located opposite one another in a working fluid region in which torque transmission coupling can be made selectively between the first and the second transmission elements by means of fluid. A valve arrangement can be actuated for selectively making and breaking a fluid flow connection between a fluid storage region and the working fluid region, in order respectively to allow and prevent the ingress of fluid from the fluid storage region into the working fluid region and a braking apparatus can generate a braking force acting on the second transmission element. Two components are movable with respect to one another within a limited range of movement by the transmission of braking force to the second transmission element.

Abstract: A freewheel unit intended especially for the stator of a hydrodynamic torque converter, allows first and second elements to rotate relative to each other around a rotational axis essentially in only one direction. A locking element carrier extends in the circumferential direction around the rotational axis and comes at least one first locking element which extends away from this carrier toward the first element in a first circumferential direction. At least one first locking element can come to rest against at least one blocking surface provided on the first element to prevent any relative rotation between the first element and the locking element carrier in one direction of relative rotation.

Abstract: An actuation device for a friction clutch arranged in the drive train of a motor vehicle includes an engagement/disengagement arrangement having a pressure fluid cylinder and a pressure fluid piston axially displaceably arranged therein. The engagement/disengagement arrangement is operatively connected to a pressure fluid source via a control valve which is actuatable as a function of a first control parameter representing a required value and a second control parameter representing an actual value of the axial position of the pressure fluid piston. The control valve being actuated by an electromagnetic positioning device.

Abstract: A torsional vibration damping device in the drive train of a motor vehicle has two coaxial cover plates which are rotationally connected and are kept at a distance apart. The two coaxial cover plates rotate about a common axis of rotation within a certain angular range relative to a coaxial internally located part arranged between the two cover paltes and the cover plates are elastically connected to the internally located part by a spring element which is effective in the circumferential direction. The cover plates are held apart by distance pieces applied transversely to the circumferential direction. Each distance piece has a joint region where the distance piece is connected to the cover plate and a connecting region which traverses the distance between the cover plates. The radial distance between the joint region and the axis of rotation differs from the radial distance between the connecting region and the axis of rotation.

Abstract: A double clutch assembly comprising a first clutch area for the optional production of a torque-transmitting connection between a drive element and a first driven element, a second clutch area for the optional production of a torque-transmitting connection between the drive element and a second driven element, and a common engaging/disengaging mechanism, by means of which the first clutch area and the second clutch area can be actuated to produce or to nullify the torque-transmitting condition.

Abstract: A torsional vibration damper, particularly for a drivetrain in a motor vehicle, having a substantially disk-shaped flywheel mass element having a friction surface for cooperating with friction facings of a friction clutch and a damper element arrangement communicating with the flywheel mass element, wherein the flywheel mass element is produced from a sheet metal material.

Abstract: A hydrodynamic coupling device includes a housing arrangement and a turbine wheel rotatably arranged in the housing arrangement for rotation about an axis of rotation. The turbine wheel has a turbine wheel shell carries a plurality of turbine wheel blades in its radially outer region and is connected to a turbine wheel hub in its radially inner region. The tubine wheel shell has a connecting portion connecting the radially outer region to the radially inner region. The turbine wheel shell further includes a reinforcing arrangement in its connecting portion.

Abstract: Spring strut with a pneumatic spring and an oscillation damper which can be adjusted as a function of the support pressure. The pneumatic spring has a spring space bounded by a U-type bellows, which spring space is pneumatically connected to a damping device which can be adjusted as a function of a support pressure. A component which having a duct connects the spring space and the damping device is embodied without a hose and is integrated in the spring strut in such a way that it does not form any essential surface change in an unrolling piston associated with the U-type bellows and the unrolling piston forms at least a part of this duct.

Abstract: Damping-valve body, in particular for a piston-cylinder unit filled with damping fluid, having separate passages for two directions of flow, at least some of the passages having an outlet opening that is at least partially covered by at least one valve disk. Each passage has a rib that extends radially, relative to a first direction of flow of the damping fluid, from a boundary wall of the passage and bears a valve support surface for the at least one valve disk.

Abstract: A drive arrangement for a motor vehicle, which has at least one internal combustion engine and a down-line clutch, via which the internal combustion engine can be connected to an output drive shaft. An electric machine is provided and includes a rotor and a stator, wherein the rotor can be coupled to a drive train formed by the internal combustion engine, the clutch and the output drive shaft by at least one switchable interlocking device.