Abstract: A hydraulic circuit for controlling a hybrid clutch and an automatic transmission of a motor vehicle. The circuit includes an electrically-powered hydraulic pump to supply the hybrid clutch and the automatic transmission with a hydraulic medium. A pressure booster is connected downstream of the hydraulic pump and includes a pressure booster slave cylinder and a pressure booster master cylinder. A hydraulic line segment extends between the pressure booster and the hybrid clutch, with the pressure booster master cylinder connected with a hybrid clutch slave cylinder to actuate the hybrid clutch. An oil feed device is connected with the pressure booster slave cylinder and fed by it with the hydraulic medium for refilling the hydrostatic line segment with the hydraulic medium.

Abstract: Apparatus for the active stabilization of the rolling of a vehicle that has at least two axles that each have at least two wheels. The axles are each equipped with a transverse stabilizer that is hydraulically actuated by a directional control valve. The transverse stabilizers are operated by respective hydraulic motors. A pressure supply pump applies different hydraulic pressure levels through respective pressure limiting valves. The directional control valve is actuated hydraulically by a directly controlled control valve.

Abstract: An electrohydraulic control device that includes at least one hydraulic actuator element, at least one sensor element, and at least one electronic control unit. The actuator element and the sensor element are combined in a hydraulically sealed hydraulic control device that is separated from the electronic control unit and that has a common power and signal terminal for connecting lines to connect the actuator element and the sensor element to the electronic control unit.

Abstract: To disengage a clutch using the clutch actuation in the event of a failure of the system, having pedal force-assisted pressurization of the hydraulic system, composed of two hydraulic circuits, a master cylinder and a slave cylinder being essentially disposed in the first circuit, and an electromotor-driven pump being in the second circuit, and the two circuits communicating with one another in a mutually controllable fashion via a valve block having a pressure slide valve and a pressure-valve spring, an emergency release mechanism is provided in the hydraulic system.

Abstract: A hydraulic system for supplying hydraulic fluid to a wet clutch, including a pump that transports the hydraulic fluid from an oil reservoir to the wet clutch through a control valve that is operated electromechanically, in particular by means of a solenoid. The control valve is a selector valve, and includes a valve position in which a pressure side of the pump is connected to a suction side of the pump, or alternatively, to the oil reservoir.

Abstract: A positive-displacement pump having an eccentrically positioned internal ring gear and pinion within a pump housing. Pressurized operating fluid is provided by the pump to actuate an actuation piston of a clutch unit, such as a double clutch unit. The clutch unit is drivingly coupled with the pump for movement between engaged and disengaged positions. At least one throughbore is provided in the pump housing within which throughbore the clutch actuation piston is guided.

Abstract: An active roll stabilization system of a vehicle having an axle with at least two wheels, wherein the axle is provided with a roll stabilizer that is actuated by means of a hydraulic device. The hydraulic device is actuated and controlled by at least one pressure control valve with a preselected pressure level by a pressure supply device, such as a pump. In order to reduce the costs for producing such an active roll stabilization system, the pressure control valve is pilot-operated by a pressure control pilot valve.

Abstract: A multiple clutch assembly for use in the power train of a motor vehicle between a prime mover and a change-speed transmission. A hub is coupled to a pumping device for an operating fluid. The pumping device is located radially outwardly of two coaxial, interfitted input shafts of the transmission. Each of the transmission shafts is associated with a discrete one of two clutches. The placing of the pump radially outwardly of the input shafts of the transmission contributes to simplicity and lower cost of the multiple clutch assembly.

Abstract: An active roll stabilization system of a vehicle having an axle with at least two wheels, wherein the axle is provided with a roll stabilizer that is actuated by means of a hydraulic device. The hydraulic device is actuated and controlled by at least one pressure control valve with a preselected pressure level by a pressure supply device, such as a pump. In order to reduce the costs for producing such an active roll stabilization system, the pressure control valve is pilot-operated by a pressure control pilot valve.

Abstract: A fluid delivery device, such as a geared machine or a gear pump, with a housing having at least one supply chamber and a displacement unit arranged within the supply chamber. The displacement unit serves to supply a medium to at least one pressure chamber provided within the housing. A pressure plate is arranged between the pressure chamber and the housing, and the pressure plate is uncoupled from the housing by at least one spacer element that is arranged between the pressure plate and the housing to provide a fluid delivery device that operates more quietly than conventional fluid delivery devices.

Abstract: A solenoid valve device, in particular a hydraulic valve device, has a solenoid element which is movable from a non-energized retracted state into an energized extended state, the working stroke of the solenoid element from its retracted state into its extended state including a constant magnetic force working stroke and an idle stroke in which the magnetic force is not constant, but decreases over the stroke.

Abstract: To disengage a clutch using the clutch actuation in the event of a failure of the system, having pedal force-assisted pressurization of the hydraulic system, composed of two hydraulic circuits, a master cylinder and a slave cylinder being essentially disposed in the first circuit, and an electromotor-driven pump being in the second circuit, and the two circuits communicating with one another in a mutually controllable fashion via a valve block having a pressure slide valve and a pressure-valve spring, an emergency release mechanism is provided in the hydraulic system.

Abstract: A multiple clutch assembly for use in the power train of a motor vehicle between a prime mover and a change-speed transmission. A hub is coupled to a pumping device for an operating fluid. The pumping device is located radially outwardly of two coaxial, interfitted input shafts of the transmission. Each of the transmission shafts is associated with a discrete one of two clutches. The placing of the pump radially outwardly of the input shafts of the transmission contributes to simplicity and lower cost of the multiple clutch assembly.

Abstract: A fluid delivery device, such as a geared machine or a gear pump, with a housing having at least one supply chamber and a displacement unit arranged within the supply chamber. The displacement unit serves to supply a medium to at least one pressure chamber provided within the housing. A pressure plate is arranged between the pressure chamber and the housing, and the pressure plate is uncoupled from the housing by at least one spacer element that is arranged between the pressure plate and the housing to provide a fluid delivery device that operates more quietly than conventional fluid delivery devices.

Abstract: A gearing, particularly for use in a gear pump which can be utilized in the power train of a motor vehicle, has a housing, a rotary internal gear in the housing, and a spur gear driven by a prime mover, mating with the internal gear and defining with the latter a crescent-shaped chamber for forcible conveying of a fluid, such as lubricant, from an inlet communicating with one end portion to an outlet communicating with the other end portion of the chamber. In order to avoid turbulent flow of fluid in the chamber, the latter is substantially filled by a composite insert. Such insert can comprise several crescent-shaped fillers with at least one seal between them, or two one-piece or composite fillers which are disposed end-to-end as seen in the circumferential direction of the internal gear and are separated from each other by an abutment which is secured to or of one piece with the housing.

Abstract: A gearing, particularly for use in a gear pump which can be utilized in the power train of a motor vehicle, has a housing, a rotary internal gear in the housing, and a spur gear driven by a prime mover, mating with the internal gear and defining with the latter a crescent-shaped chamber for forcible conveying of a fluid, such as lubricant, from an inlet communicating with one end portion to an outlet communicating with the other end portion of the chamber. In order to avoid turbulent flow of fluid in the chamber, the latter is substantially filled by a composite insert. Such insert can comprise several crescent-shaped fillers with at least one seal between them, or two one-piece or composite fillers which are disposed end-to-end as seen in the circumferential direction of the internal gear and are separated from each other by an abutment which is secured to or of one piece with the housing.