Abstract: A hydraulic valve for a cam phaser, the hydraulic valve comprising: a bushing including a piston that is movable in a bore along a longitudinal direction; a supply connection for feeding a hydraulic fluid; a first operating connection and a second operation connection; and a first tank drain connection and a second tank drain connection configured to drain the hydraulic fluid, wherein a first check valve is associated with the first operating connection and a second check valve is associated with the second operating connection, and the first operating connection and the second operating connection are connectable through at least one of the first check valve and the second check valve alternatively with each other or with the supply connection or with the first tank drain connection or with the second tank drain connection by moving the piston, wherein the hydraulic valve includes five switching positions,

Abstract: A hydraulic valve for a cam phaser, the hydraulic valve comprising: a bushing including a piston that is movable in a bore along a longitudinal direction; a supply connection for feeding a hydraulic fluid; a first operating connection and a second operation connection; and a first tank drain connection and a second tank drain connection configured to drain the hydraulic fluid, wherein a first check valve is associated with the first operating connection and a second check valve is associated with the second operating connection, and the first operating connection and the second operating connection are connectable through at least one of the first check valve and the second check valve alternatively with each other or with the supply connection or with the first tank drain connection or with the second tank drain connection by moving the piston, wherein the hydraulic valve includes five switching positions,

Abstract: A cartridge valve including a hydraulic bushing including at least one connection which is configured as a slotted hole extending over a defined portion of a circumference of the hydraulic bushing with respect to a longitudinal axis of the hydraulic bushing and which is protected by a screen insert inserted into the slotted hole. According to the invention the slotted hole includes a receiving groove that is configured at least over a portion of a circumference of the slotted hole, and the screen insert is arrangeable so that its outer edge is at least partially supported between a shoulder configured in the receiving groove and a cover tongue of the receiving groove wherein the cover tongue is arranged opposite to the shoulder.

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: The invention relates to a cartridge valve including a hydraulic bushing including at least one connection which is configured as a slotted hole extending over a defined portion of a circumference of the hydraulic bushing with respect to a longitudinal axis of the hydraulic bushing and which is protected by a screen insert inserted into the slotted hole. According to the invention the slotted hole includes a receiving groove that is configured at least over a portion of a circumference of the slotted hole, and the screen insert is arrangeable so that its outer edge is at least partially supported between a shoulder configured in the receiving groove and a cover tongue of the receiving groove wherein the cover tongue is arranged opposite to the shoulder.

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, wherein the supply connection is hydraulically connected with the first hydraulic displacement cavity in the low range of the hydraulic pressure, wherein the hydraulic piston c

Abstract: A releasable check valve for use with very high system pressures. The check valve is formed such that the poppet piston is relatively smooth-running and that good action and a long service life of the seals are obtained, wherein the receiving bore has essentially the same diameter in the region of the inserts and between the inserts. A spacer bushing is arranged axially between the inserts, in which bushing the piston collar can move separating the two annular spaces on both sides of it fluidically from each other. The bore can be machined from one side, so that the inserts are centered precisely with respect to one another and the poppet piston is guided precisely. This reduces the risk of jamming and the risk of an uneven load on the seals.