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US 10,330,065 B2Granted
Direct magnetically controlled inlet valve for fuel pump
AssigneeStanadyne, Inc.
InventorRobert G. Lucas
Life of this patent
Estimating the term…
Abstract
An inlet valve assembly for a fuel pump comprises a valve assembly inflow path and valve assembly outflow path; a magnetic valve member situated in an intermediate flow path fluidly linking the inflow path and the outflow path; a magnetic pole adjacent the valve member; and a selectively energizable coil for generating a magnetic flux directly magnetically coupling the pole and the valve member; whereby the valve member opens and closes fluid communication between the inflow path and the outflow path in response to the energized state of the coil.
Claims19
A fuel pump comprising a pump housing, a fuel inlet connection on the housing for delivering feed fuel into an inlet flow path in the housing;
- a pumping chamber and associated pumping piston in the housing for receiving feed fuel from the inlet flow path through an inlet valve assembly, increasing the fuel pressure, and delivering fuel at said increased pressure to a discharge flow path;
- an outlet connection on the housing, in fluid communication with the discharge flow path through an outlet valve;
- wherein the inlet valve assembly includes a valve member directly magnetically coupled to an electromagnetic coil, whereby the coil is selectively energizable to generate a magnetic flux circuit directly through the inlet valve member, thereby selectively applying or removing a magnetic force to said valve member to respectively close and open a sealing face of said valve member against a mating sealing surface in said inlet flow path;
- and wherein the magnetic flux circuit passes through said sealing surface and said sealing face across a magnetic gap between said sealing surface and said sealing face, with sufficient magnetic force to close the sealing face of the inlet valve member against said sealing surface.
1 more element
An inlet valve assembly for a fuel pump, comprising:
- a valve assembly inflow path and valve assembly outflow path;
- a magnetic valve member having a sealing face confronting a spaced apart sealing surface situated in an intermediate position fluidly linking the inflow path and the outflow path;
- a magnetic pole magnetically coupled to said sealing surface, with the sealing surface confronting the sealing face of the valve member across a magnetic gap in said fluidly linking flow path;
- and
- a selectively energizable electromagnetic coil around said pole, for closing the sealing face of the valve member against said sealing surface by generating a magnetic flux circuit directly magnetically coupling the pole and the sealing face of the valve member through said magnetic gap with sufficient magnetic force to close the sealing face of the inlet valve member against said sealing surface;
- whereby the valve member opens and closes fluid communication between the inflow path and the outflow path in response to a respective de-energized and energized state of the coil.
3 more elements
A fuel pump comprising:
- a pump housing;
- a fuel inlet connection on the housing for delivering feed fuel into an inlet flow path in the housing;
- a pumping chamber and associated pumping piston in the housing for receiving feed fuel from the inlet flow path through an inlet valve assembly, increasing the fuel pressure, and delivering fuel at said increased pressure to a discharge flow path;
- an outlet connection on the housing, in fluid communication with the discharge flow path through an outlet valve;
- an inlet valve assembly including a valve member directly magnetically coupled to an electromagnetic coil, whereby the coil is selectively energizable to generate a magnetic flux circuit directly through the inlet valve member, thereby selectively applying or removing a magnetic force to said valve member to respectively close and open a sealing face of said valve member against a mating sealing surface in said inlet flow path;
- and wherein the magnetic flux circuit passes through said sealing surface and said sealing face;
- and the inlet valve assembly includes a central magnetic pole coaxially situated within and including one end projecting from the coil, a portion of the inlet flow path passes radially through the pole and through the projection of the pole into a central bore, in the projection of the pole, that opens at said one end of the projection.
4 more elements
An inlet valve assembly for a fuel pump, comprising:
- a valve assembly inflow path and valve assembly outflow path;
- a magnetic valve member having a sealing face confronting a spaced apart sealing surface situated in an intermediate position fluidly linking the inflow path and the outflow path;
- a magnetic pole confronting the sealing face of the valve member;
- and a selectively energizable coil for closing the face of the valve member against said sealing surface by generating a magnetic flux circuit directly magnetically coupling the magnetic pole and the face of the valve member;
- whereby the valve member opens and closes fluid communication between the inflow path and the outflow path in response to the a respective de-energized and energized state of the coil and wherein the magnetic pole is a cylinder coaxially situated within and includes one end projecting from an electromagnetic coil, and a portion of the valve assembly inflow path passes radially through the magnetic pole and through the projection of the magnetic pole into a central bore, in the projection of the magnetic pole, which that opens at said one end of the projection.
2 more elements
Dependencies are inferred from the claim text.