Patent ID: 7584728

Claim:
A method for operating an oil flow control valve in a combustion engine, said oil flow control valve having an input side for receiving a supply oil pressure from an oil supply, said oil flow control valve being provided for affecting a cam phaser disposed at an output side of said oil flow control valve and comprising a spool disposed in a spool housing with cam phaser ports for feeding oil to and from said cam phaser, the method comprising the step of synchronising a displacement of said spool in said housing with combustion demands, and synchronising movement of said spool with oil pressure characteristics on the output side of the oil flow control valve, wherein said oil pressure characteristics on the output side of the oil flow control valve that exceed said supply oil pressure cause movement of said spool to block said cam phaser ports, and wherein said oil pressure characteristics on the output side of the oil flow control valve that are below said supply oil pressure cause movement of said spool to open said cam phaser ports.