Abstract: A hydraulic valve for a pivot motor adjustment device of a camshaft, the hydraulic valve including a valve housing with a longitudinal axis and a valve piston that is axially moveable in the valve housing along the longitudinal axis, wherein a first operating connection of the valve housing and a second operating connection of the valve housing is openable and closable by the valve piston, wherein the first operating connection and the second operating connection are axially offset from one another; and a supply connection of the valve housing, wherein the supply connection supplies the hydraulic valve with hydraulic fluid fed by a feed device, wherein the hydraulic fluid flows through the hydraulic valve on different paths defined by a flowable channel system of the valve piston.

Abstract: A rotary actuator including a hydraulic valve including a borehole with shoulders, and a first operating connection and a second operating connection originating from the borehole, wherein a pressure balanced hollow piston is arranged axially movable in the borehole, wherein the hollow piston is fitted with a first outer diameter in a borehole section in a sealing manner, wherein the hollow piston includes the following axially subsequent to the first outer diameter: an enveloping surface with a large outer diameter in an axial portion of the first operating connection, and an enveloping surface with a small outer diameter in an axial portion of the second operating connection, wherein an inlet edge and an outlet edge extends from each of the first enveloping surface and the second enveloping surface, wherein the two inlet edges are oriented away from one another and the two outlet edges are oriented towards one another.

Abstract: A connecting rod for a two stage variable compression in an internal combustion engine, the connecting rod including a combustion piston pin support eye that is arranged offset relative to an axis in an eccentrical component which is pivotable about the axis in a first direction of rotation through a first hydraulic displacement cavity and pivotable in a second direction of rotation through a second hydraulic displacement cavity, wherein a hydraulic valve is arranged in the connecting rod, wherein the hydraulic valve includes a hydraulic supply connection at which a hydraulic pressure is applied, wherein the hydraulic pressure moves a hydraulic piston against a force of a preload of a spring, wherein the hydraulic piston remains in a stable low pressure position in a low range of the hydraulic pressure due to the preload of the spring.

Abstract: A central valve for a pivot motor actuator, the central valve including a housing tube including a first operating connection, a supply connection, a second operating connection and a tank drain connection; a piston enveloped by the housing tube and moveable relative to the housing tube, wherein the first operating connection is connected with the supply connection and the second operating connection is connected with the tank drain connection in a first position of the piston, wherein the piston is positioned in a center position in a second position, and wherein the second operating connection is connected with the supply connection and the first operating connection is connected with the tank drain connection in a third position of the piston, wherein the piston includes at least one first check valve on its outside.

Abstract: The invention relates to a central valve for a pivot motor actuator. A housing tube of the central valve includes radial recesses for operating connections. A piston of the central valve has a center position. In the center position both radial recesses are covered by annular bars of the piston towards the tank drain connection by overlaps. Thus, pressure spikes from the operating connections to the check valves are strongly throttled.

Abstract: A sealing device (12) for a camshaft adjuster (1) which is driveable using a belt and has a distributing valve (8) with a piston, wherein the sealing device (12) has a first securing portion (13) rigidly arrangeable on the camshaft adjuster (1), a second securing portion (14) rigidly arrangeable on the piston side, and a flexible membrane portion (15) arranged between the first securing portion (13) and the second securing portion (14), and a camshaft adjuster (1) having a having a stator (3) which, based on a combustion engine, is driveable using a belt, and a rotor (4) with limited twistability relative to the stator (3), wherein a twisting can be effected hydraulically, and a distributing valve (8) with a piston for the purpose of freeing up or blocking the pathway for a hydraulic medium or altering a through-flow direction, wherein the camshaft adjuster (1) has a sealing device (12) of the type whose first securing portion (13) is rigidly arranged on the camshaft adjuster (1) and whose second securing por

Abstract: The invention relates to an oscillating motor adjuster with a stator (1), a rotor (8) which is positioned within the stator (1) and is displaceable relative to the stator (1) on a first rotor connection (11) by hydraulic pressure in a first direction, and relative to the stator (1) on a second rotor connection (13) by hydraulic pressure in a second direction, a central valve (12) which projects through a hub (7) of the rotor (8) and is inserted into a camshaft (18), wherein the central valve (12) has a first working connection (A) and, at an axial distance from the first working connection (A), a second working connection (B), and wherein the first working connection (A) is connected to the first rotor connection (11) and the second working connection (B) to the second rotor connection (13).

Abstract: A valve timing control device for an internal combustion engine. The valve timing control device includes a rotor connected to a camshaft and having a plurality of vanes. A stator is engaged with the rotor, and includes a plurality of webs. Pressure chambers are provided between each of the webs and vanes. A centering slot is provided on the stator and/or the rotor. A pressure medium control valve is disposed in one of the vanes of the rotor, and is configured to not only selectively lock and unlock the position of the rotor relative to the stator, but is also configured such that pressure medium in the pressure chambers is veritable through the centering slot and thereafter through the pressure medium control valve.

Abstract: A sealing device (12) for a camshaft adjuster (1) which is driveable using a belt and has a distributing valve (8) with a piston, wherein the sealing device (12) has a first securing portion (13) rigidly arrangeable on the camshaft adjuster (1), a second securing portion (14) rigidly arrangeable on the piston side, and a flexible membrane portion (15) arranged between the first securing portion (13) and the second securing portion (14), and a camshaft adjuster (1) having a having a stator (3) which, based on a combustion engine, is driveable using a belt, and a rotor (4) with limited twistability relative to the stator (3), wherein a twisting can be effected hydraulically, and a distributing valve (8) with a piston for the purpose of freeing up or blocking the pathway for a hydraulic medium or altering a through-flow direction, wherein the camshaft adjuster (1) has a sealing device (12) of the type whose first securing portion (13) is rigidly arranged on the camshaft adjuster (1) and whose second securing por

Abstract: The invention provides a method for mounting a friction disc on a rotor. The friction disc is reduced in diameter by means of a pair of pliers. The friction disc has an inner ring part and an outer ring part joined together by means of crossarms. The friction disc is inserted with reduced diameter into a depression of the rotor by sliding the inner ring part axially with respect to the outer ring part. The tension on the pair of pliers is relieved to allow the diameter of the friction disc to expand in the depression of the rotor. The friction disc can then be secured in the rotor by means of a central screw.

Abstract: The invention relates to a hydraulic valve for an oscillating motor adjuster that utilizes camshaft alternating torques by means of non-return valves for more rapid adjustment. The non-return valve that is not used for the respective rotation is additionally closed by means of the piston of the hydraulic valve.

Abstract: A rotary actuator including a hydraulic valve including a borehole with shoulders, and a first operating connection and a second operating connection originating from the borehole, wherein a pressure balanced hollow piston is arranged axially movable in the borehole, wherein the hollow piston is fitted with a first outer diameter in a borehole section in a sealing manner, wherein the hollow piston includes the following axially subsequent to the first outer diameter: an enveloping surface with a large outer diameter in an axial portion of the first operating connection, and an enveloping surface with a small outer diameter in an axial portion of the second operating connection, wherein an inlet edge and an outlet edge extends from each of the first enveloping surface and the second enveloping surface, wherein the two inlet edges are oriented away from one another and the two outlet edges are oriented towards one another.

Abstract: A valve timing control device for an internal combustion engine. The valve timing control device includes a rotor connected to a camshaft and having a plurality of vanes. A stator is engaged with the rotor, and includes a plurality of webs. Pressure chambers are provided between each of the webs and vanes. A centering slot is provided on the stator and/or the rotor. A pressure medium control valve is disposed in one of the vanes of the rotor, and is configured to not only selectively lock and unlock the position of the rotor relative to the stator, but is also configured such that pressure medium in the pressure chambers is veritable through the centering slot and thereafter through the pressure medium control valve.

Abstract: A valve train comprises a double camshaft with an inner camshaft and an outer camshaft. The two camshafts are preferably designed coaxially. By means of a rotatory change in position of the inner camshaft to the outer camshaft, the angular position of at least one cam of the inner camshaft is adjusted or set relative to a cam of the outer camshaft. The cams are divided into sets that can occupy variable cam positions relative to one another. Various configurations of a camshaft adjuster are provided for this purpose.

Abstract: The invention relates to an oscillating-motor camshaft adjuster having a hydraulic valve, which has two working ports. These two working ports each have a standard opening axially adjacent to one another and an opening for the utilization of pressure peaks as a consequence of camshaft alternating torques. A hydraulic pressure can be guided from a supply port to the working port to be loaded, while the working port to be relieved of pressure is guided to a tank port. In order to also keep the control performance high in the case of internal combustion engines with very greatly fluctuating camshaft alternating torques, it is proposed according to the invention that a position of hydraulic valve can be controlled proportionally, in which the pressure peaks of the working port to be relieved of pressure are blocked relative to the supply port and the working port that is to be loaded.

Abstract: A valve timing control apparatus for a combustion engine according to which a rotational member, such as a sprocket, is driven by said combustion engine, a rotor is mechanically coupled with a camshaft for controlling opening and closing of cylinder valves of said combustion engine, a first configuration is provided in which the rotor is locked to the rotational member; and a second configuration is provided in which the rotor is unlocked from said rotational member. In another aspect an operating method of said valve timing control apparatus for adjusting a valve timing of a combustion engine is provided. The apparatus controls a relative rotation between a camshaft and an output shaft, which can either be prevented or permitted.

Abstract: The invention provides a method for mounting a friction disc on a rotor. The friction disc is reduced in diameter by means of a pair of pliers. The friction disc has an inner ring part and an outer ring part joined together by means of crossarms. The friction disc is inserted with reduced diameter into a depression of the rotor by sliding the inner ring part axially with respect to the outer ring part. The tension on the pair of pliers is relieved to allow the diameter of the friction disc to expand in the depression of the rotor. The friction disc can then be secured in the rotor by means of a central screw.

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: The invention relates to a vane-type motor cam phaser with a rotor and a camshaft. Between this rotor and the camshaft, a friction disc is braced axially by means of a central screw. Accordingly, this friction disc transmits a drive torque in a frictionally engaged manner. For pivoting the rotor in two oppositely lying directions of rotation, at least two oil channels (A, B) run through the camshaft and a hub of the rotor. At least the one oil channel (A or B) is sealed hydraulically radially inward by an inner ring part of the friction disc and radially outward by an outer ring part of the friction disc. The inner ring part and the outer ring part are joined to each other by means of a crossarm.

Abstract: A valve timing control apparatus for a combustion engine according to which a rotational member, such as a sprocket, is driven by said combustion engine, a rotor is mechanically coupled with a camshaft for controlling opening and closing of cylinder valves of said combustion engine, a first configuration is provided in which the rotor is locked to the rotational member; and a second configuration is provided in which the rotor is unlocked from said rotational member. In another aspect an operating method of said valve timing control apparatus for adjusting a valve timing of a combustion engine is provided. The apparatus controls a relative rotation between a camshaft and an output shaft, which can either be prevented or permitted.