Abstract: A cam phaser including an electromagnetically actuated hydraulic valve; and a hollow piston inserted in a borehole and longitudinally movable by an electromagnet so that a hydraulic fluid is distributed to operating connections associated with pressure cavities of the cam phaser, wherein a first operating connection branches off from a borehole directly adjacent to the electromagnet, wherein the hollow piston includes a circumferential bar with a control edge oriented towards the electromagnet so that a cavity within the borehole is defined on one side by the circumferential bar and on another side by the electromagnet, wherein a drain opening extends from the cavity, wherein the drain opening hydraulically connects the cavity with a drain channel leading towards a tank drain, wherein the bar is movable into a direction expanding the first operating connection in the flow cross section by a force of the electromagnet that is loaded with electrical current.

Abstract: A cam phaser including an electromagnetically actuated hydraulic valve; and a hollow piston inserted in a borehole and longitudinally movable by an electromagnet so that a hydraulic fluid is distributed to operating connections associated with pressure cavities of the cam phaser, wherein a first operating connection branches off from a borehole directly adjacent to the electromagnet, wherein the hollow piston includes a circumferential bar with a control edge oriented towards the electromagnet so that a cavity within the borehole is defined on one side by the circumferential bar and on another side by the electromagnet, wherein a drain opening extends from the cavity, wherein the drain opening hydraulically connects the cavity with a drain channel leading towards a tank drain, wherein the bar is movable into a direction expanding the first operating connection in the flow cross section by a force of the electromagnet that is loaded with electrical current.

Abstract: A hydraulic valve for oscillating-motor camshaft adjuster is provided. The valve has a bush and a hollow piston with a piston bottom. The piston is axially movable within the bush by means of an actuator against the force of a screw-type pressure spring. The actuator is applied to the piston bottom. A sleeve secured in the bush is disposed inside the hollow piston and can be displaced relative to the piston. The wall of this sleeve has at least one through-opening, which leads to at least one opening of the hollow piston, which opening can guide a supply pressure (P) applied inside the sleeve alternatively to two sets of pressure chambers of the oscillating-motor camshaft adjuster. The sleeve has a sleeve bottom that seals off the inside space of hollow piston.

Abstract: A device for coupling a piston to an annular disc, in particular to a captive C-washer/swash plate or to a pivot ring of the working unit of a reciprocating-piston machine, preferably of a compressor of the air-conditioning system of a motor vehicle, having a piston bridge which is assigned to the piston and sliding shoes which are assigned to the annular disc, wherein the piston bridge engages at least partially around or over the annular disc and is in sliding engagement with the annular disc by means of the sliding shoes, is characterized in that the piston bridge is of two-layer design at least on the side facing towards the piston. The invention also relates to a reciprocating-piston machine having a device according to the invention.

Abstract: The invention relates to a solenoid valve that is to be mounted leaktight and in a simple manner. Provided according to the invention is a first housing part with a tool engagement portion for screwing of a second housing part into an inner thread of a receptacle. The two housing parts are joined immovably to each other. The first housing part has a tensile strength that is greater than a tensile strength of second housing part.

Abstract: The invention relates to a hydraulic valve for oscillating-motor camshaft adjuster The valve has a bush and a hollow piston with a piston bottom. The piston is axially movable within the bush by means of an actuator against the force of a screw-type pressure spring. The actuator is applied to the piston bottom. A sleeve secured in the bush is disposed inside the hollow piston and can be displaced relative to the piston. The wall of this sleeve has at least one through-opening, which leads to at least one opening of the hollow piston, which opening can guide a supply pressure (P) applied inside the sleeve alternatively to two sets of pressure chambers of the oscillating-motor camshaft adjuster. The sleeve has a sleeve bottom that seals off the inside space of hollow piston.

Abstract: The invention relates to a camshaft insert for a camshaft, which can be, in particular, a composite camshaft. In this case, the camshaft insert bears an oscillating motor adjuster. An accumulator that can be loaded by means of a spring force is disposed inside camshaft insert. Alternatively, the accumulator can also be disposed in the camshaft.

Abstract: The invention relates to a solenoid valve that is to be mounted leaktight and in a simple manner. Provided according to the invention is a first housing part with a tool engagement portion for screwing of a second housing part into an inner thread of a receptacle. The two housing parts are joined immovably to each other. The first housing part has a tensile strength that is greater than a tensile strength of second housing part.

Abstract: A device for coupling a piston to an annular disc, in particular to a captive C-washer/swash plate or to a pivot ring of the working unit of a reciprocating-piston machine, preferably of a compressor of the air-conditioning system of a motor vehicle, having a piston bridge which is assigned to the piston and sliding shoes which are assigned to the annular disc, wherein the piston bridge engages at least partially around or over the annular disc and is in sliding engagement with the annular disc by means of the sliding shoes, is characterized in that the piston bridge is of two-layer design at least on the side facing towards the piston. The invention also relates to a reciprocating-piston machine having a device according to the invention.

Abstract: The invention relates to a non-return valve for a pump, in particular a fuel pump, with a housing (2) in which a valve seat (3) is embodied, a closing body (4) and a cage element. The closing body (4) is arranged within the cage element, whereby the cage body is embodied in two pieces. The cage element comprises a guide element (5) and a stop element (6), such that a functional separation of the regions of the cage element with various functions is possible.

Abstract: An inlet or outlet valve for a pump comprises a closing body (3) pretensioned by a spring element (4). The closing body (3) can open or close a passage on a valve seat (2). The valve also comprises a guide element (5) for guiding the closing body (3). Inside the guide element (5), the closing body (3) is guided at least on a first guiding area (9) and a second guiding area (10).

Abstract: An inlet or outlet valve for a pump comprises a closing body (3) pretensioned by a spring element (4). The closing body (3) can open or close a passage on a valve seat (2). The valve also comprises a guide element (5) for guiding the closing body (3). Inside the guide element (5), the closing body (3) is guided at least on a first guiding area (9) and a second guiding area (10).

Abstract: The invention relates to a non-return valve for a pump, in particular a fuel pump, with a housing (2) in which a valve seat (3) is embodied, a closing body (4) and a cage element. The closing body (4) is arranged within the cage element, whereby the cage body is embodied in two pieces. The cage element comprises a guide element (5) and a stop element (6), such that a functional separation of the regions of the cage element with various functions is possible.