Patent ID: 6082315
Filing Date: 2000-07-04
Classification: F01L

Abstract:
An electromagnetic actuator for an actuated valve mounted onto a cylinder head, the valve having a valve stem and a valve step tip, the actuator comprising:at least one pair of electromagnets, each pair of electromagnets further comprising an upper electromagnet and a lower electromagnet, wherein the upper and lower electromagnets of said pair are in a mirror relationship to each other about a central vertical axis, said lower electromagnet further having a channel disposed therein;an armature element disposed intermediate said upper and lower electromagnet, said armature element having a normally biased initial first position when said upper and lower electromagnets are off, a second fixed open position proximal said lower electromagnet when said lower electromagnet is energized, and a third fixed close position proximal said upper electromagnet when said upper electromagnet is energized;an armature shaft integrally attached to said armature element and extending vertically through said channel of said lower electromagnet;an tipper spring retainer assembled onto said armature shaft;a support member having a first end and a second end, said first end of said support member integrally attached Lo said upper spring retainer;a target disposed on said second end of said support member;an upper spring disposed intermediate said upper spring retainer and said lower electromagnet;a valve spring retainer mounted onto the valve stem;a valve spring disposed intermediate said valve spring retainer and the cylinder head; anda sensor having a cylindrical wall, said cylindrical wall encompassing said valve spring and defining a gap to receive said target.