Patent ID: 6768406
Filing Date: 2004-07-27
Classification: F01L

Abstract:
An apparatus for an internal combustion engine having a plurality of cylinders, comprising a plurality of engine valves which are rectilinearly axially movable along mutually parallel paths and a plurality of independently controllable actuators equal in number to a number of said plurality of engine valves, each of said actuators having:a valve push rod rectilinearly axially movable in a housing, an armature of ferromagnetic material fixed to the respective push rod and movable in the housing by an electromagnet having at least one coil mounted on a ferromagnetic circuit, and at least one valve return spring with an end bearing against the rod, wherein a pair of actuators allocated to two valves of a same type associated with a same single engine cylinder have a common E shaped ferromagnetic circuit with a middle branch which is common to two actuators and extends between the armatures, and two separate outer branches.