Abstract: Presented is a hydraulic coupling for an actuating system for actuating a motor vehicle clutch. The hydraulic coupling includes a socket part defining an internal recess, a plug part configured for insertion into the socket part, a locking element that engages with the plug part and the socket part in an assembled state of the hydraulic coupling and which holds the plug part and the socket part captively together, a damping element that is configured for damping undesirable vibrations, with the damping element being supported on the locking element, and a support element disposed between the damping element and the locking element and extending around the entire circumference of the damping element.

Abstract: A hydraulic actuation apparatus for a motor vehicle clutch includes a master cylinder, a slave cylinder, a hydraulic line forming a main fluid channel connecting the master cylinder to the slave cylinder to form a pressure space, and a damping member arranged in the pressure space for attenuating pressure pulses. The damping member includes a connection channel connected to the main fluid channel and a fluid guide directing fluid from the main fluid channel into the connection channel. The damping member or other hydraulic operating component is preferably formed integrally with the hydraulic line, and is preferably injection molded plastic.

Abstract: A hydraulic cylinder includes a housing having a fluid connection for connecting to a hydraulic system and an after-running connection for connecting to a fluid after-running vessel, and a piston which is axially displaceable in the housing to define a variable pressure space having a gas collecting portion, the piston being fixed against rotation in the housing and having at least one after-running groove which is oriented substantially toward the gas collecting portion. A primary seal arranged in the housing and receiving the piston therethrough is bridged by the after-running groove when the piston is in an extended end position, whereby the gas collecting portion of the pressure space communicates with the after-running connection when the piston is in the extended end position.

Abstract: A hydraulic cylinder includes a housing having a fluid connection for connecting to a hydraulic system and an after-running connection for connecting to a fluid after-running vessel, and a piston which is axially displaceable in the housing to define a variable pressure space having a gas collecting portion, the piston being fixed against rotation in the housing and having at least one after-running groove which is oriented substantially toward the gas collecting portion. A primary seal arranged in the housing and receiving the piston therethrough is bridged by the after-running groove when the piston is in an extended end position, whereby the gas collecting portion of the pressure space communicates with the after-running connection when the piston is in the extended end position.

Abstract: A hydraulic actuation apparatus for a motor vehicle clutch includes a master cylinder, a slave cylinder, a hydraulic line forming a main fluid channel connecting the master cylinder to the slave cylinder to form a pressure space, and a damping member arranged in the pressure space for attenuating pressure pulses. The damping member includes a connection channel connected to the main fluid channel and a fluid guide directing fluid from the main fluid channel into the connection channel. The damping member or other hydraulic operating component is preferably formed integrally with the hydraulic line, and is preferably injection molded plastic.

Abstract: A release arrangement for a hydraulically actuated clutch in a motor vehicle has an energy accumulator connected with a hydraulic system. The energy accumulator is connected with a pedal via a kinematic arrangement which adapts the pedal forces to the pedal path. It is possible to adapt the boosting force characteristic to the required pedal force curve in a very precise manner. This leads to a boosting force that possibly increases the depressing force, but primarily increases the force in the boosting area following the dead center of the kinematic arrangement. The characteristic of the boosting force curve over the pedal path can be adapted to the respective operating system in the motor vehicle without major structural alterations.

Abstract: A release arrangement for a hydraulically actuated clutch in a motor vehicle has an energy accumulator connected with a hydraulic system. The energy accumulator is connected with a pedal via a kinematic arrangement which adapts the pedal forces to the pedal path. It is possible to adapt the boosting force characteristic to the required pedal force curve in a very precise manner. This leads to a boosting force that possibly increases the depressing force, but primarily increases the force in the boosting area following the dead center of the kinematic arrangement. The characteristic of the boosting force curve over the pedal path can be adapted to the respective operating system in the motor vehicle without major structural alterations.

Abstract: In a master/slave cylinder system for clutches or brakes, primary seals have bevels which interact with similar bevels of formations on housings of the respective cylinders. Along with the lowest possible friction in the region of the sealing lips, this permits carrying out uncomplicated pressure/negative-pressure filling in the case of the master cylinder. The primary seals slide by the wedge of effects in the direction of the pressure on the bevels of the annular formations and reduce the annular bearing face of the sealing lip in a frictionally optimized manner.

Abstract: A release arrangement for a hydraulically actuated clutch in a motor vehicle has an energy accumulator connected with a hydraulic system. The energy accumulator is connected with a pedal via a kinematic arrangement which adapts the pedal forces to the pedal path. It is possible to adapt the boosting force characteristic to the required pedal force curve in a very precise manner. This leads to a boosting force that possibly increases the depressing force, but primarily increases the force in the boosting area following the dead center of the kinematic arrangement. The characteristic of the boosting force curve over the pedal path can be adapted to the respective operating system in the motor vehicle without major structural alterations.

Abstract: In a cylinder for a hydraulic system, a seal has a sealing bead clamped between a housing of the cylinder and a supporting part which holds the sealing bead in a deformed state by pretensioning. The seal is reliably held in its intended position by the supporting part and, therefore, pressure fluctuations in the pressure space do not cause a relative movement of the seal and wear of the sealing bead.

Abstract: A release arrangement for a hydraulically actuated clutch in a motor vehicle has an energy accumulator connected with a hydraulic system. The energy accumulator is connected with a pedal via a kinematic arrangement which adapts the pedal forces to the pedal path. It is possible to adapt the boosting force characteristic to the required pedal force curve in a very precise manner. This leads to a boosting force that possibly increases the depressing force, but primarily increases the force in the boosting area following the dead center of the kinematic arrangement. The characteristic of the boosting force curve over the pedal path can be adapted to the respective operating system in the motor vehicle without major structural alterations.

Abstract: In a master/slave cylinder system for clutches or brakes, primary seals have bevels which interact with similar bevels of formations on housings of the respective cylinders. Along with the lowest possible friction in the region of the sealing lips, this permits carrying out uncomplicated pressure/negative-pressure filling in the case of the master cylinder. The primary seals slide by the wedge of effects in the direction of the pressure on the bevels of the annular formations and reduce the annular bearing face of the sealing lip in a frictionally optimized manner.

Abstract: A throttle device for use with a hydraulic adjustment devices that have an input cylinder and an output cylinder and a hydraulic line filled with fluid connecting the output cylinder and the input cylinder, is arranged in the hydraulic line for establishing various throttle resistances to the flow of the fluid in both flow directions through the hydraulic line. The throttle device includes a disk with at least one boring and/or at least one passage channel. The disk moves back and forth, as the fluid flows, in both flow directions, and thereby strikes against a first stop in one direction and against a second stop in the other direction. The throttle device in the form of a disk in the movement space which is a transition from the hydraulic line to the supply line of the cylinder in its diameter, with a stop disk secured in the hydraulic line forming the second stop is economically advantageous. The disk that acts as the valve is distinguished by its low cost.

Abstract: A hydraulic actuation device for the adjustment of units in motor vehicles includes a piston-cylinder unit with a housing and a piston displaceably arranged in the cylinder portion of the housing and/or in a guide sleeve in the housing. The piston-cylinder unit may be a slave cylinder or a master cylinder. The cylinder has a connection channel along one of its surface lines with an outer channel wall which is located in a portion of the connection channel located farthest from a center axis of the cylinder. The outer channel wall approximately follows a straight line and has an angle of inclination relative to the center axis which is greater than zero and preferably equal to or greater than a maximum installation angle of the installed position of the housing. The described arrangement of the deaeration bore hole at the highest possible location in the pressure space of the cylinder is advantageous for a deaeration of the hydraulic system for repairs and servicing.

Abstract: A seal element, in particular an elastomer gasket for use in hydraulic annular cylinders, such as in clutches, with a radially outer and a radially inner seal lip, characterized by the fact that the seal lips are axially offset in relation to one another.

Abstract: A cylinder for pressure media, in particular a hydraulic master or slave cylinder in motor vehicles, having a bleed element which can be screwed into an aperture in the cylinder casing and which bleed element is sealed against the casing. The bleed element is functionally connected in the vicinity of that end inserted in the casing to a round sealing element, which is pressed axially against a shoulder in the aperture.

Abstract: A hydraulically actuated clutch release system for a motor vehicle friction clutch, including a piston-cylinder unit oriented concentrically to a transmission input shaft, whereby the cylinder is fastened to the transmission housing, and has the cylinder chamber for the piston between an inner and an outer cylinder shell. The piston itself is guided inside a guide element surrounded by the outer cylinder shell. The outer cylinder shell, next to the guide element, has at least one retaining member which can be brought into contact with the guide element, and through which retaining member the guide element can be secured against participation in the movement of the piston during the engagement and release of the clutch. In this case, when there is a change in the axial position of the piston caused by wear in the friction clutch, the action of the retaining member can be suppressed for a displacement of the guide element.