HYDRAULIC VALVE FOR CAM PHASER

摘要

A hydraulic valve, in particular for a cam phaser of a cam shaft, the hydraulic valve including a supply connection with a check valve for supplying a hydraulic fluid; at least one first operating connection and a second operating connection; at least one first tank outlet and a second tank outlet for draining the hydraulic fluid; a piston that is moveable in a bore hole along a longitudinal direction of the bore hole for distributing the hydraulic fluid from the supply connection to the first operating connection and/or the second operating connection and for conducting the hydraulic fluid from the first operating connection to the second operating connection and from the first operating connection to the first tank outlet and/or from the second operating connection to the second tank outlet; and a sleeve that is arranged in the piston moveable relative to the piston in the longitudinal direction.

主权项

1. A hydraulic valve for a cam phaser of a cam shaft, the hydraulic valve comprising:
a supply connection with a check valve for supplying a hydraulic fluid; at least one first operating connection and a second operating connection; at least one first tank outlet and a second tank outlet for draining the hydraulic fluid; a piston that is moveable in a bore hole along a longitudinal direction of the bore hole distributing the hydraulic fluid from the supply connection to at least one of the at least one first operating connection and the second operating connection and for conducting the hydraulic fluid from the at least one first operating connection to the second operating connection and from the at least one first operating connection to the at least one first tank outletor from the second operating connection to the second tank outlet; and
a sleeve that is arranged in the piston moveable relative to the piston in the longitudinal direction, wherein a first fluid path from the at least one first operating connection to the second operating connection is controlled by a movement of the sleeve in the longitudinal direction caused by a pressure difference of the hydraulic fluid in the supply connection and at the at least one first operating connection.