An electro-hydraulic device for controlling a gas exchange valve for an internal combustion engine

A device 1 for controlling a gas exchange valve 2 for an internal combustion engine comprises: an electro-hydraulic valve actuator 36, means 13, 14 for influencing the valve actuator 36 in the opening direction of the gas exchange valve 2 by means of a fluid which is subjected to actuation pressure,...

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Bibliographische Detailangaben
Hauptverfasser: SIMON KIESER, UWE HAMMER, BJOERN SCHUETZ
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A device 1 for controlling a gas exchange valve 2 for an internal combustion engine comprises: an electro-hydraulic valve actuator 36, means 13, 14 for influencing the valve actuator 36 in the opening direction of the gas exchange valve 2 by means of a fluid which is subjected to actuation pressure, and means 20 for the controlled discharge of the fluid out of the valve actuator 36. In order to be able to reliably and precisely adjust the closing speed of the gas exchange valve 2 and thus the speed at which a valve disc 5 of the gas exchange valve 2 impinges upon the valve seat ring 6, there is included a means 20 for the controlled discharge of the fluid comprising a pressure-controlled restrictor clement 22 which can be influenced by a control pressure and the device 1 further comprises means 24, 25, 26 to regulate the control pressure to a predeterminable pressure value.