Electromagnetic valve actuating system
AssigneeIsuza Ceramics Research Institute Company, Inc.
InventorHideo Kawamura
Life of this patent
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Abstract
An apparatus for driving valve by electromagnetic force, for an engine capable of being installed in a narrower space due to the interfering object or narrow arrangement pitch of a supply/exhaust valve, comprises: a fixed magnetic pole which is wound with the primary coils and which is opposingly disposed embracing the secondary coils in the perpendicular direction to the reciprocating direction of the secondary coils; an air gap adjacent with a tip end of the fixed magnetic pole and provided in the middle of a magnetic flux path generated from the primary coil; a movable element adapted to be made of magnetic substance, to move freely reciprocating in the air gap, to form part of the magnetic flux path, and to contain the secondary coils.
Claims25
An apparatus for driving a supply/exhaust valve by an electromagnetic force acting between a primary coil and a secondary coil, the primary coil being fixed on an engine and generating magnetic flux, the secondary coil capable of reciprocating movement induced by said flux and being connected to a supply/exhaust valve, comprising:
- a fixed magnetic member wound with the primary coil and opposing the secondary coil in a perpendicular direction to a reciprocating direction of the secondary coil;
- and
- a movable element including a magnetic substance, capable of reciprocating in an air gap defined adjacent to an end of said fixed magnetic member, and provided in a middle of a magnetic flux path generated by the primary coil, said movable element forming a part of the magnetic flux path, and containing the secondary coil.
An apparatus comprising:
- a valve having a stem and an end member;
- an element coupled to said valve, having at least one coil arranged in approximate concentricity about the stem;
- a first at least one electromagnet arranged to oppose the end member;
- and
- a second at least one electromagnet arranged to oppose movement of the element in the direction of the valve stem, wherein the second at least one electromagnet provides a speed adjustment of said valve by inducing a current in the at least one coil.
An apparatus comprising:
- a valve having a stem;
- and
- an element coupled to said valve, having at least one coil arranged in approximate concentricity about the stem, said element including a composite material formed of magnetic substance powder and plastic, in which the at least one coil is fixed.
A system comprising:
- a first valve unit including
- a first valve having a first stem,
- a first element coupled to the first valve, having a first at least one coil arranged in approximate concentricity about the first stem, and
- a first at least one electromagnet having a first radial width and a first arcuate shape arranged to oppose the first element;
- and
- a second valve unit including
- a second valve having a second stem,
- a second element coupled to the second valve, having a second at least one coil arranged in approximate concentricity about the second stem,
- a second at least one electromagnet having a second radial width and a second arcuate shape arranged to oppose the second element,
- a spacing between said first valve unit and said second valve unit being less than a sum of the first and second radial widths.
A system comprising:
- a first valve unit including
- a first valve having a first stem and a first end member,
- a first element coupled to the first valve, having a first at least one coil arranged in approximate concentricity about the first stem,
- a first at least one electromagnet having a first radial width and a first arcuate shape arranged to oppose the first element,
- a second at least one electromagnet having a second radial width and a second arcuate shape and arranged to oppose the first end member;
- and
- a second valve unit including
- a second valve having a second stem and a second end member,
- a second element coupled to the second valve, having a second at least one coil arranged in approximate concentricity about the second stem,
- a third at least one electromagnet having a third radial width and a third arcuate shape arranged to oppose the second element, and
- a fourth at least one electromagnet having a fourth radial width and a fourth arcuate shape and arranged to oppose the second end member,
- a spacing between said first valve unit and said second valve unit being less than a sum of the first and third radial widths, and
- the spacing being less than a sum of the second and fourth radial widths.
Dependencies are inferred from the claim text.