EP2829719A1 - Elektromagnetisches Ventil - Google Patents

Elektromagnetisches Ventil Download PDF

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Publication number
EP2829719A1
EP2829719A1 EP13177653.6A EP13177653A EP2829719A1 EP 2829719 A1 EP2829719 A1 EP 2829719A1 EP 13177653 A EP13177653 A EP 13177653A EP 2829719 A1 EP2829719 A1 EP 2829719A1
Authority
EP
European Patent Office
Prior art keywords
valve
armature
electromagnetic
upper face
electromagnetic valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13177653.6A
Other languages
English (en)
French (fr)
Inventor
Philippe Barbier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delphi International Operations Luxembourg SARL
Original Assignee
Delphi International Operations Luxembourg SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Delphi International Operations Luxembourg SARL filed Critical Delphi International Operations Luxembourg SARL
Priority to EP13177653.6A priority Critical patent/EP2829719A1/de
Publication of EP2829719A1 publication Critical patent/EP2829719A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059

Definitions

  • This disclosure relates to electromagnetic valves and has particular, but not exclusive application, to electromagnetic valves for a fuel injector, such as for, but not limited to, automotive applications.
  • Known fuel injectors generally comprise member such as a valve needle slidable within a bore to control flow of fuel.
  • the valve needle is arranged to lift away from a valve seat to allow fuel under pressure from a supply passage to be dispensed in a combustion space/chamber. Conversely to close the valve the needle is forced onto the valve seat.
  • a valve member may be generally slidably located to control flow of fuel.
  • movement of the valve needle/member movement is provided by electromagnetic (solenoid) actuation means.
  • the movable valve member will include an armature portion, and in typical designs this armature is attached to a valve needle or valve stem (portion).
  • Movement of the valve member is provided by electromagnetic attraction of the armature towards the actuator, typically against an actuator spring acting in the opposite direction.
  • the attraction force applied at the peripheral edge of a valve armature is in the order of 30N, whilst the valve stem is urged toward down by the actuator spring with a force in the order of 20 N.
  • an electromagnetic valve including a valve member located within a valve body, and adapted to move in slidable manner within a bore defined in the valve body, movement of the valve member selectively allowing fluid/fuel flow within said electromagnetic valve.
  • the valve body may include a central longitudinal axis.
  • the valve member may operatively be connected to a valve armature, such that activation/deactivation of the valve armature provides the slidable movement of said valve member.
  • the valve armature may be generally of cylindrical form having an upper face and a lower face wherein the valve body includes an armature chamber within which the valve armature is located. A substantial portion of said upper face of the valve armature may be sloped outwardly from the central axis and/or wherein the side wall of the armature chamber and/or the valve armature is sloped.
  • the upper face of the valve armature may be convex.
  • the upper face of the valve armature may be of conically form.
  • the upper face of the valve armature may be curved.
  • the electromagnetic valve may include an angle ( ⁇ ) between the upper face of the valve armature and a horizontal plane being between 1° - 9°.
  • the angle ( ⁇ ) may be between 3° - 7°.
  • the angle ( ⁇ ) may be between 4° - 6°.
  • the side wall of the armature chamber and/or the valve armature may be sloped.
  • a fuel injector includes an electromagnetic valve.
  • FIG. 1 shows a conventional portion of an electromagnetic valve 10.
  • the electromagnetic valve 10 includes a valve member 14 located within a valve body 16, and adapted to move in a slidable manner within a bore define in the valve body 16.
  • the valve body 16 includes a central longitudinal axis L.
  • the movement of the valve member 14 selectively allows fluid/fuel flow within the electromagnetic valve 10.
  • the valve member 14 is operatively connected to a valve armature 12, such that an activation/deactivation of such valve armature 12 provides the movement of the valve member 14.
  • the valve armature 12 is generally of cylindrical form having an upper face 18 and a lower face 20.
  • the valve body 16 includes an armature chamber 28 within which the valve armature 12 is located.
  • the valve armature 12 is located below an electromagnetic actuator 22 which includes a fixed core 24, an excitation coil 26 and a return spring 30.
  • an electromagnetic actuator 22 provides an electromagnetic attraction (force) on the valve armature 12 to provide an upwards force and movement of the valve member 14 against the force of the spring 30.
  • FIG. 2 shows a portion of an electromagnetic valve 10 according to one embodiment of the invention.
  • the electromagnetic valve 10 includes a valve member 14 located within a valve body 16, and adapted to move in a slidable manner within a bore define in the valve body 16.
  • the valve body 16 includes a central longitudinal axis L.
  • the movement of the valve member 14 is selectively allowing fluid/fuel flow within the electromagnetic valve 10.
  • the valve member 14 is operatively connected to a valve armature 12, such that an activation/deactivation of the valve armature 12 provides the movement of the valve member 14.
  • the valve armature 12 and the valve member 14 are shown as one piece, they may alternatively embodied in two pieces.
  • the valve armature 12 is generally of cylindrical form having an upper face 18 and a lower face 20.
  • the valve body 16 includes an armature chamber 28 within valve armature 12 is located.
  • the valve armature 12 is located below an electromagnetic actuator 22 which includes a fixed core 24, an excitation coil 26 and a return spring 30.
  • Such electromagnetic actuator 22 allows the movement of the valve member 14 by electromagnetic attraction of the valve armature 12.
  • the lower face 20 of the valve armature is generally conical in form.
  • the upper face 18 of the valve armature 12 is sloped outwardly from the central axis L.
  • upper face 18 of the valve armature 12 can be convex in shape, curved in shape or having a conically form sloping upwards.
  • Such shape of the upper face 18 of the valve armature 12 allows an efficient draining of the fuel/liquid between the upper face 18 of the valve armature 12 and the electromagnetic actuator 22.
  • the magnetic force coming from the electromagnetic actuator 22 is now applying mostly on the center area of the armature.
  • Such shape of the upper face 18 of the valve armature 12 gives also benefits to have a higher level of stiffness, thus less deformable, deformation being due to magnetic force.
  • the global benefit of such electromagnetic valve 10 is that the valve motion is better, thus valve is quicker (closing and opening phases).
  • the fuel delivery in a combustion chamber is better controlled, especially on small quantities like pilot injections.
  • the outward slope from the central axis L of the upper face 18 of the valve armature 12 may be defined by an angle ⁇ between the upper face 18 of the valve armature 12 and a horizontal plane.
  • the value of the angle ⁇ is within the interval 1° - 9°.
  • a tradeoff could be applied on the angle ⁇ and so a reduced interval of the angle ⁇ within 3° - 7° can be applied.
  • the angle ⁇ can vary within the interval 4° - 6°.
  • Figure 3 shows an embodiment similar to that of figure 2 , where a substantial portion of the side wall of the armature chamber 28 and/or the side wall of the valve armature 12 is sloped, at least along a substantial portion thereof.
  • the slope is such that the diameter of the chamber armature 28 narrows towards the lower/distal portion(s) thereof.
  • the side wall of the armature chamber 28 and the side wall of the valve armature may be substantially parallel. This gives the benefit of better flow of the fuel by avoiding sharp corners.
EP13177653.6A 2013-07-23 2013-07-23 Elektromagnetisches Ventil Withdrawn EP2829719A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13177653.6A EP2829719A1 (de) 2013-07-23 2013-07-23 Elektromagnetisches Ventil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13177653.6A EP2829719A1 (de) 2013-07-23 2013-07-23 Elektromagnetisches Ventil

Publications (1)

Publication Number Publication Date
EP2829719A1 true EP2829719A1 (de) 2015-01-28

Family

ID=48856528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13177653.6A Withdrawn EP2829719A1 (de) 2013-07-23 2013-07-23 Elektromagnetisches Ventil

Country Status (1)

Country Link
EP (1) EP2829719A1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5307997A (en) * 1993-03-12 1994-05-03 Siemens Automotive L.P. Fuel injector swirl passages
EP0798459A2 (de) * 1996-03-30 1997-10-01 LUCAS INDUSTRIES public limited company Einspritzdüse
US20050189512A1 (en) * 2004-02-27 2005-09-01 Takashi Kaneko Electromagnetic valve gear
DE102004033280A1 (de) * 2004-07-09 2006-02-02 Robert Bosch Gmbh Einspritzventil zur Kraftstoffeinspritzung
DE102008040068A1 (de) * 2008-07-02 2010-01-07 Robert Bosch Gmbh Konkave Luftspaltbegrenzung bei Magnetventil
DE102008040073A1 (de) * 2008-07-02 2010-01-07 Robert Bosch Gmbh Luftspaltbegrenzung bei Magnetventil
DE102011004640A1 (de) * 2011-02-24 2012-08-30 Robert Bosch Gmbh Steuerventil für einen Kraftstoffinjektor sowie Kraftstoffinjektor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5307997A (en) * 1993-03-12 1994-05-03 Siemens Automotive L.P. Fuel injector swirl passages
EP0798459A2 (de) * 1996-03-30 1997-10-01 LUCAS INDUSTRIES public limited company Einspritzdüse
US20050189512A1 (en) * 2004-02-27 2005-09-01 Takashi Kaneko Electromagnetic valve gear
DE102004033280A1 (de) * 2004-07-09 2006-02-02 Robert Bosch Gmbh Einspritzventil zur Kraftstoffeinspritzung
DE102008040068A1 (de) * 2008-07-02 2010-01-07 Robert Bosch Gmbh Konkave Luftspaltbegrenzung bei Magnetventil
DE102008040073A1 (de) * 2008-07-02 2010-01-07 Robert Bosch Gmbh Luftspaltbegrenzung bei Magnetventil
DE102011004640A1 (de) * 2011-02-24 2012-08-30 Robert Bosch Gmbh Steuerventil für einen Kraftstoffinjektor sowie Kraftstoffinjektor

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