Patent ID: 9267399
Filing Date: 2016-02-23
CPC Classification: F01L

Claim Text:
1. A control valve of a camshaft adjuster, wherein hydraulic medium flows through the control valve for control of the camshaft adjuster, the control valve comprising an intake connection (P), several working connections (A, B), a pin connection (Pin) and a tank connection (T) and a hollow cylindrical housing with several openings, a control piston which is axially movable in the housing, an internal casing surface of the housing guides the control piston, and the control piston is axially positioned in order to thus control the flow of hydraulic medium between the said connections (P, T, A, B, Pin) through the openings, the hollow cylindrical housing has first, second, and third pin openings which are axially spaced apart from one another, said pin openings are connected to the pin connection (Pin) in a fluid-conducting manner, wherein the first and second ones of the pin openings are connected in each case in first and second axial positions of the control piston to the tank connection (T) in a fluid-conducting manner and the third pin opening is not connected in a third axial position of the control piston to the tank connection (T) in a fluid-conducting manner.