Abstract: A hydraulic section (1) for actuating a vehicle clutch having a master cylinder (3), a slave cylinder (2) and a hydraulic line (4) which connects both cylinders and is divided into two line sections by a ventilating device (5). The line sections of the hydraulic line which act as a siphon (4a) and a riser (4b) are guided together to said ventilating device (5), such that they are spaced apart from one another, in a chamber which is formed from at least one of these ends.

Abstract: A hydraulic section (1) for actuating a vehicle clutch having a master cylinder (3), a slave cylinder (2) and a hydraulic line (4) which connects both cylinders and is divided into two line sections by a ventilating device (5). The line sections of the hydraulic line which act as a siphon (4a) and a riser (4b) are guided together to said ventilating device (5), such that they are spaced apart from one another, in a chamber which is formed from at least one of these ends.

Abstract: A slave cylinder and a release system, the slave cylinder being configured in particular as a CSC for a hydraulic system of a motor vehicle. While maintaining the axial extension of the working space of the piston axially moveable in the slave cylinder, the force for actuating the clutch is increased in that the pressure chamber is sealed by two sealing elements having different diameters, and in that at least one energy accumulator is disposed in the pressure chamber of the slave cylinder, the energy accumulator generating a preload on the clutch release bearing operative connected to the slave cylinder.

Abstract: The clutch system relates to an automatic friction clutch with a hydrostatically actuator-controlled clutch withdrawal. In such clutch release systems, a slave cylinder pressurized by a master cylinder in an engaged state is in connection with a reservoir (tank) via a connection opening uncovered by the master cylinder piston. To determine the opening deviations and location of the connection opening, it is proposed that actuation of master cylinder be velocity-dependent and pressure patterns of the hydrostatic clutch release system be evaluated.

Abstract: A hydraulic element, in particular for arranging in a pressure line between a master cylinder and a slave cylinder of a hydraulic clutch actuating arrangement, having a housing which has a master-cylinder-side hydraulic connection and a slave-cylinder-side hydraulic connection and which holds a valve arrangement, a simpler design is obtained in that the valve arrangement has two valve bodies which are mounted in a floating fashion in the housing and which can be moved relative to one another counter to the force of a spring.

Abstract: The invention relates to a joining arrangement for connecting a pipe to a system, especially a hydraulic clutch disengagement system. The joining arrangement comprises a joining member which can be fixed to a final section of the pipe and is to be connected to an opposite piece that is fastened to the system. The joining member positively embraces at least one radially prominent protrusion of the pipe for fastening purposes.

Abstract: A slave cylinder and a release system, the slave cylinder being configured in particular as a CSC for a hydraulic system of a motor vehicle. While maintaining the axial extension of the working space of the piston axially moveable in the slave cylinder, the force for actuating the clutch is increased in that the pressure chamber is sealed by two sealing elements having different diameters, and in that at least one energy accumulator is disposed in the pressure chamber of the slave cylinder, the energy accumulator generating a preload on the clutch release bearing operative connected to the slave cylinder.

Abstract: A hydraulic element, in particular for arranging in a pressure line between a master cylinder and a slave cylinder of a hydraulic clutch actuating arrangement, having a housing which has a master-cylinder-side hydraulic connection and a slave-cylinder-side hydraulic connection and which holds a valve arrangement, a simpler design is obtained in that the valve arrangement has two valve bodies which are mounted in a floating fashion in the housing and which can be moved relative to one another counter to the force of a spring.

Abstract: The clutch system relates to an automatic friction clutch with a hydrostatically actuator-controlled clutch withdrawal. In such clutch release systems, a slave cylinder pressurized by a master cylinder in an engaged state is in connection with a reservoir (tank) via a connection opening uncovered by the master cylinder piston. To determine the opening deviations and location of the connection opening, it is proposed that actuation of master cylinder be velocity-dependent and pressure patterns of the hydrostatic clutch release system be evaluated.

Abstract: A slave cylinder, especially for a hydraulic system of a motor vehicle, the slave cylinder including a housing with an outer tube and a fixing ring, and a guiding sleeve including an inner tube. The outer tube and the inner tube define a pressure chamber wherein a ring piston can be arranged in an axially displaceable manner, and the guiding sleeve includes a fixing plate which is pressed against the fixing ring. A seal is arranged in a sealing groove between the inner region and the fixing plate, and a device for exerting an axial force of the fixing ring on the fixing plate is arranged in the outer region of the fixing ring. An object of the invention is to prevent the seal between the housing and the inner tube from failing, or at least to reduce the probability thereof under high internal pressures.

Abstract: The invention relates to a joining arrangement for connecting a pipe to a system, especially a hydraulic clutch disengagement system. The joining arrangement comprises a joining member which can be fixed to a final section of the pipe and is to be connected to an opposite piece that is fastened to the system. The joining member positively embraces at least one radially prominent protrusion of the pipe for fastening purposes.

Abstract: The piston in the master cylinder of a hydraulic system of the kind that is used particularly in motor vehicles is made of a duroplastic polymer material.

Abstract: In a hydraulic system (1) for motor vehicles in particular, comprising a master cylinder (4), a slave cylinder (5) and a hydraulic medium line (15) connecting the two, the flexibility and hydraulic rigidity are improved by the fact that the hydraulic medium line (15) includes at least two sections (16, 17, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30) having different wall thicknesses. A feeder line or hydraulic medium line with an inert inner material layer and a transfer device with two interconnected pipes running in parallel are also disclosed.

Abstract: A clutch-actuating device for a clutch in a motor vehicle power train has an actuator motor driving an actuating member and a transfer mechanism which transmits the movement of the actuating member to a clutch release element that is movable against an opposing force of a clutch spring to displace the clutch from a closed position to an open position. The transfer mechanism has a first movement range in which the movement of the actuating member in the opening direction of the clutch does not displace the clutch from its closed position, and a second movement range in which the movement of the actuating member causes a displacement of the clutch. The transfer mechanism has an interval of loose play, which is used up within the first range.

Abstract: A power train for use in motor vehicles has a friction clutch including a housing which rotates with the output shaft of the engine and a clutch disc which transmits torque to the input shaft of a change-speed transmission in the engaged condition of the clutch. The clutch can be engaged and/or disengaged by one or more slave cylinders which is or are rotatably mounted on and is or are being held against axial movement relative to the clutch housing. At least one release bearing can be installed between the piston(s) of the slave cylinder(s) and the diaphragm spring of the friction clutch, and a second bearing is or can be installed between the slave cylinder housing(s) and the clutch housing.

Abstract: A clutch-actuating device for a clutch in a motor vehicle power train has an actuator motor driving an actuating member and a transfer mechanism which transmits the movement of the actuating member to a clutch release element that is movable against an opposing force of a clutch spring to displace the clutch from a closed position to an open position. The transfer mechanism has a first movement range in which the movement of the actuating member in the opening direction of the clutch does not displace the clutch from its closed position, and a second movement range in which the movement of the actuating member causes a displacement of the clutch. The transfer mechanism has an interval of loose play, which is used up within the first range.

Abstract: In a hydraulic system (1) for motor vehicles in particular, comprising a master cylinder (4), a slave cylinder (5) and a hydraulic medium line (15) connecting the two, the flexibility and hydraulic rigidity are improved by the fact that the hydraulic medium line (15) includes at least two sections (16, 17, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30) having different wall thicknesses. A feeder line or hydraulic medium line with an inert inner material layer and a transfer device with two interconnected pipes running in parallel are also disclosed.

Abstract: The piston of a master cylinder in the power train of a motor vehicle is made, at least in part, of a thermosetting plastic material and cooperates with one or more annular seals to ensure that a source of hydraulic fluid is communicatively connected with the chamber in the housing of the master cylinder when the piston is moved by one or more springs or otherwise in a sense to increase the volume of the chamber. When a pedal or another actuator causes the piston to expel pressurized fluid from the master cylinder into a slave cylinder, the seal or seals cooperates or cooperate with the housing and/or with the piston of the master cylinder to seal the source from the chamber of the master cylinder. The slave cylinder can actuate the friction clutch between the prime mover and the transmission in the power train of the motor vehicle.

Abstract: The piston in the master cylinder of a hydraulic system of the kind that is used particularly in motor vehicles is made of a duroplastic polymer material.

Abstract: An hydraulic system that includes a master cylinder, a slave cylinder, a fluid conduit extending between the cylinders, and a pressure relief valve within the conduit between the cylinders. The pressure relief valve includes at least one port that is closed by an elastic member that overlies the port and that opens when fluid pressure acting through the port exceeds a predetermined level to cause the elastic member to open the port.