SYSTEM AND METHOD FOR VARIABLE ACTUATION OF A VALVE OF AN INTERNAL COMBUSTION ENGINE, WITH A DEVICE FOR DAMPENING PRESSURE OSCILLATIONS

A system for variable actuation of an engine valve of an internal-combustion engine, comprises a master piston (16) and a slave piston (21), which drives the engine valve (7) and is hydraulically driven by said master piston (16) by means of a volume of pressurized fluid (C). The system further comprises an electrically operated control valve (24), which controls a communication of the volume of pressurized fluid (C) with a lower pressure environment (23). A device (D) for dampening pressure oscillations is connected to the volume of pressurized fluid (C) and comprises an additional volume adapted for receiving fluid from the volume of pressurized fluid (C) only when, following upon oscillations of the pressure in the volume of pressurized fluid (C), the pressure exceeds a maximum threshold value, which is higher than a mean pressure value that is set up in the volume of pressurized fluid (C).