Patent ID: 6186100
Filing Date: 2001-02-13
Classification: F01L

Abstract:
An engine valve assembly for an internal combustion engine having a cylinder head, the engine valve assembly comprising:an engine valve having a valve head portion and a valve axle portion, the valve axle being slidably mounted within the cylinder head;an armature having an armature axle portion linked to the valve axle portion of the engine valve;an actuator housing assembled onto the cylinder head;an electromagnetic actuator disposed within the actuator housing and having a pair of first and second electromagnets, each of the first and second electromagnets being vertically extended with respect to an axis direction of the armature axle portion and being contacted on the actuator housing; anda pair of first and second spring members, the first spring member biasing the engine valve toward a valve open direction and the second spring member biasing the engine valve toward a valve closure direction so that the engine valve is open and closed according to a cooperation of forces exerted by the pair of first and second electromagnets and the pair of first and second spring members, the actuator housing taking an engine oil structure having at least one oil passage through which an engine oil external to the valve assembly is supplied to the actuator housing and at least one oil outlet hole through which the engine oil in the oil passage is caused to flow onto a slidable portion of movable members of the valve assembly of the valve axle portion of the engine valve and the armature and taking an oil heating structure, the oil heating structure being enabled to heat the oil within the oil passage due to a heat transfer action thereof by means of a simultaneous power supply to the pair of first and second electromagnets before an initialization operation of the valve assembly.