Patent ID: 7089896
Filing Date: 2006-08-15
Classification: F01L

Abstract:
1. A device for controlling gas exchange valves in a combustion cylinder of an internal combustion engine, comprising: hydraulic valve positioners, each of which is assigned to one of the gas exchange valves, each of the hydraulic valve positioner including a positioning piston and hydraulic working chambers, the positioning piston being for actuating one of the gas exchange valves and for delimiting the hydraulic working chambers, a first working chamber of the hydraulic working chambers being for actuating an assigned gas exchange valve in a closing direction and for being continuously fillable by a pressurized fluid, a second working chamber of the hydraulic working chambers being for actuating the assigned gas exchange valve in an opening direction and for being alternately fillable and emptiable by the pressurized fluid via first and second electrical control valves; wherein a second working chamber of a second valve positioner of a pair of valve positioners is fillable via a second working chamber of a first valve positioner, the second working chamber of the second valve positioner communicating with the first control valve following a predetermined stroke of the positioning piston of the first valve positioner in an opening direction of the assigned gas exchange valve.