Patent ID: 6321702
Filing Date: 2001-11-27
Classification: F01L

Abstract:
A system for controlling a gas exchange valve for internal combustion engines, which system comprises:a housing, a movable valve member (3) in said housing, which, on an end close to a combustion chamber of the engine, has a valve sealing face (7), said valve sealing face cooperates with a valve seat (9) in order to control an inlet or outlet cross section to or from the combustion chamber of the engine and on an end remote from the combustion chamber said movable valve has a working piston (11) which defines at least one hydraulic working chamber (21) which is alternatingly filled with a pressure fluid and discharged of said fluid to move the valve member (3) in an opening and closing direction, whereby the supply pressure of the pressure fluid supplied for the actuation of the gas exchange valve member (3) is adjusted as a function of current operating parameters of the engine during the operation of the engine, wherein the supply pressure of the valve control device is adjusted step wise during the operation of the engine as a function of engine operating parameters.