Patent Number: 6,308,667

Title: Actuator for engine valve with tooth and socket armature and core for providing position output and/or improved force profile

Abstract: An electrically actuated engine valve provides an armature having one or more teeth extending outward from the armature along the actuation axis to be received by corresponding sockets in the cores of opposed electromagnets. The teeth do not restrain the movement of the armature but in approaching the cores provides a magnetic flux path that produces a more constant force of attraction during actuation of the valve. This enables the valves to overcome initial opposing forces such as caused by pressure on the valve heads to which the armature is attached and provides a path of inductive coupling between the opposed coils that can reveal armature position providing a method of accurately controlling armature seating speed.

Inventors: Tsai; Hong (Farmington Hills, MI), Xiang; Youqing (Canton, MI)

Assignee: Visteon Global Technologies, Inc.

International Classification: F01L 9/04 (20060101); F01L 009/04 (); F16K 031/06 ()

Expiration Date: 10/30/2018