Device for operating a gas exchange valve of an internal combustion engine
AssigneeDaimlerChrysler AG
InventorsThomas Stolk, Alexander Von Gaisberg
Life of this patent
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Abstract
In a device for operating a gas exchange valve of an internal combustion engine having an electromagnetic actuator including a valve opening magnet and a valve closing magnet, between which there is arranged an armature which, together with an opening spring, engages a valve stem against the force of a closing spring, and a hydraulic play-compensating element is arranged in the valve operating force transmission structure, the hydraulic play-compensating element is installed in the transmission structure together with a mechanical adjusting element providing for minimal valve play when the engine is shut down.
Claims6
A device for operating a gas exchange valve with a valve stem of an internal combustion engine, having an operating mechanism with an electromagnetic actuator including a valve opening magnet and a valve closing magnet arranged in axially spaced relationship, an armature movably disposed between said valve opening and closing magnets, a valve opening spring acting on said valve stem in a valve opening direction and a valve closing spring acting on said valve stem in a valve closing direction against the force of said valve opening spring and a hydraulic play-compensating element arranged in said device for adjustment of the play in said operating mechanism, and a mechanical play-compensating element selected and installed in said operating mechanism during assembly of said device so as to provide minimal valve play when said internal combustion engine is not operating.
Dependencies are inferred from the claim text.