Patent ID: 6247432
Filing Date: 2001-06-19
Classification: F01L

Abstract:
An engine valve assembly for an internal-combustion engine, comprising(a) an engine valve having open and closed positions and a first oscillating mass;(b) a closing spring connected to said valve and urging said valve into said closed position;(c) an electromagnetic actuator operating said valve and including(1) a first and a second electromagnet having a first and second pole face, respectively; said first and second pole faces being oriented toward one another and defining a space therebetween;(2) an armature movable back and forth in said space between said first and second pole faces; and(3) a guide bar affixed to said armature; said guide bar having an end oriented toward said valve and defining therewith a valve clearance when said valve is in said closed position and said armature is in contact with one of said first and second electromagnets; said armature and said guide bar together having a second oscillating mass; said second oscillating mass being at least twice said first oscillating mass; and(d) an opening spring connected to said guide bar and urging said armature and said guide bar toward said valve.