Patent ID: 6418892
Filing Date: 2002-07-16
Classification: F01L

Abstract:
Apparatus for controlling a plurality of engine valves arranged for reciprocating movement along mutually parallel respective axes, the apparatus comprising as many actuators as there are valves, each actuator having:an armature of ferromagnetic material secured to a valve push-rod, at least one return spring having one end bearing against the push-rod and having its opposite end bearing against stationary anchor means that are adjustable in position relative to a case of the actuator, electromagnet means in the case for moving the armature in linearly along the axis of the respective valve , whereby adjustment of the anchor means in the direction of the reciprocating movement enables to set a rest position of said armature, wherein the anchor means comprise a toothed wheel rotatable about the axis of a respective one of said push-rods and in abutment against the case, and a spring bearing cup that is prevented from rotating and that has a helical connection with the respective toothed wheel, said spring for forcing the toothed wheel into contact with the case and wherein passage means are provided parallel to said axes to pass a rotary adjustment tool for turning the toothed wheel of the respective actuator.