EP1651860B1 - Soupape d'injection de carburant et procede de montage de cette soupape - Google Patents

Soupape d'injection de carburant et procede de montage de cette soupape Download PDF

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Publication number
EP1651860B1
EP1651860B1 EP20040738738 EP04738738A EP1651860B1 EP 1651860 B1 EP1651860 B1 EP 1651860B1 EP 20040738738 EP20040738738 EP 20040738738 EP 04738738 A EP04738738 A EP 04738738A EP 1651860 B1 EP1651860 B1 EP 1651860B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
filter element
support tube
fuel
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.)
Expired - Fee Related
Application number
EP20040738738
Other languages
German (de)
English (en)
Other versions
EP1651860A1 (fr
Inventor
Thomas Sebastian
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1651860A1 publication Critical patent/EP1651860A1/fr
Application granted granted Critical
Publication of EP1651860B1 publication Critical patent/EP1651860B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0667—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature acting as a valve or having a short valve body attached thereto
    • 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
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • F02M2200/505—Adjusting spring tension by sliding spring seats
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8061—Fuel injection apparatus manufacture, repair or assembly involving press-fit, i.e. interference or friction fit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/23—Screens
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/794—With means for separating solid material from the fluid
    • Y10T137/8085—Hollow strainer, fluid inlet and outlet perpendicular to each other

Definitions

  • the invention relates to a fuel injection valve according to the preamble of claim 1 and a method for assembling a fuel injection valve according to claim 8.
  • the US 5,356,079 describes a filter retaining assembly with a flat or cup-shaped filter medium which is held on an annular mounting frame, preferably of fuel-tolerant plastic.
  • the mounting frame has a nose circumferentially and surrounds the inlet end of the fuel inlet nozzle.
  • the nose in the mounting frame snaps into a circumferential groove on the outer edge of the Brennscherinlivesstutzens and thus fixes the Filter medium at the fuel inlet port.
  • a similar filter holder for a cup-shaped filter medium is also off US 2003/0155447 known.
  • a fuel injector in which a fuel filter is made in one piece with a retaining collar.
  • the retaining collar extends radially beyond the fuel inlet port and has a nose outside of the fuel inlet port.
  • the circumferential nose of the retaining collar forms, together with a groove on the outer circumference of the fuel inlet nozzle a latching connection, by which the fuel filter is fixed defined.
  • a disadvantage of the from the DE 43 25 842 A1 known fuel injection valve is in particular the high production costs incurred for fixing the filter either on the adjusting sleeve or on the fuel inlet. Furthermore, filters and adjusting sleeve made of different materials, which occur at the contact surfaces mainly on the plastic of the filter Abspanungen and abrasion, which can lead to malfunction of the fuel injection valve by the deposition of the particles.
  • the fuel injection valve according to the invention with the features of claim 1 and the inventive method for mounting a fuel injection valve with the features of claim 7 have the advantage of a fast and cost-effective production and assembly and a chip-free and reliable fixation of the filter element in the fuel injection valve.
  • the filter element is pressed with an outer contour of a support tube of the fuel injection valve wherein the press fit of the filter element is effected by the mounting of an extension sleeve whose inner diameter is slightly smaller than an outer diameter of the filter element.
  • the outer contour of the support tube has grooves, in which a Glasmaschinebuchstoffum mousseung the filter element is pressed under pressure.
  • a further advantage is that the grooves can be introduced in a simple manner by turning or by means of a forming steel in the support tube.
  • the filter element is advantageously pot-shaped as conventional filter elements produced from a fabric material and a Glasmaschinebuchstoffum mousseung.
  • Fig. 1 shows for better understanding of the inventive measures first in a sectional, schematic sectional view of a longitudinal section through a fuel injection valve 1 according to the prior art, which is particularly suitable for injecting fuel into a suction pipe of an internal combustion engine, not shown.
  • the fuel injection valve 1 comprises a magnetic coil 2 which is wound on a bobbin 3.
  • the bobbin 3 is encapsulated in a valve housing 4 and closed by a cover 5.
  • a contact lug 6 is formed at the bobbin 3.
  • the bobbin 3 is penetrated by a valve sleeve 7, which is designed tubular and comprises therein a spread or welded support tube 8, which serves as the inner pole of the magnetic coil 2.
  • a valve sleeve 7 As the outer pole of the solenoid coil 2, for example, the valve housing 4 serve.
  • an armature 9 is arranged, which is formed integrally with a valve needle 10.
  • through-flow openings 11 are provided, which guide the fuel injector 1 flowing through the fuel to a sealing seat.
  • a ring filter 12 may be arranged for filtering the fuel.
  • the valve needle 10 is preferably by welding in operative connection with a spherical valve closure member 13 in the embodiment, which forms a sealing seat with a valve seat body 14. Downstream of the sealing seat, at least one spray-discharge opening 15 is formed in a spray-disk 34, from which the fuel is injected into the suction pipe (not shown).
  • the armature 9 is in the idle state of the fuel injection valve 1 by a return spring 16 so acted upon, that the fuel injection valve 1 is kept closed by the pressure of the valve closing body 13 on the valve seat body 14.
  • the return spring 16 is arranged in a recess 17 of the armature 9 and the support tube 8 and is brought by an adjusting sleeve 18 to bias.
  • a cup-shaped filter element 19 is preferably pressed into the valve sleeve 7.
  • the filter element 19 is provided with a brass ring 20, which allows a secure hold of the filter element 19 in the fuel injector 1.
  • the fuel which is supplied through a central fuel supply 22, flows through the fuel injection valve 1 through the recess 17 and the throughflow openings 11 to the sealing seat and to the injection opening 15.
  • Fig. 1B shows in an excerpted sectional view the in Fig. 1A with IB designated section of the in Fig. 1A shown fuel injector 1.
  • the same components are provided with matching reference numerals. A repetitive description of already known components can be dispensed with.
  • the filter element 19 is cup-shaped and consists of a filter 21, which preferably consists of a fabric material 24, and a brass ring 20 for fixing the filter element 19 in the fuel injector 1.
  • a filter 21 which preferably consists of a fabric material 24, and a brass ring 20 for fixing the filter element 19 in the fuel injector 1.
  • the brass ring 20 is preferably designed as a deep-drawn part. The brass ring 20 and the complex sealing of the injection mold cause high production costs of the filter element 19 with the brass ring 20th
  • Fig. 2A shows a schematic sectional view of an embodiment of a filter element 19, which is suitable for equipping a fuel injection valve 1 designed according to the invention.
  • the filter element 19 is cup-shaped similar to the known filter elements 19. It consists of a fabric material 24 which is provided with a fiberglass extrusion coating 25.
  • the assembly of the filter element 19 is carried out according to the invention, as in Fig. 2B shown on the inner pole serving as support tube 8 of the fuel injection valve 1.
  • Fig. 2B shown on the inner pole serving as support tube 8 of the fuel injection valve 1.
  • At an inflow end 26 of the support tube 8 are grooves 27 provided in an outer contour 28 of the support tube 8, which can be produced for example by means of turning or by a mild steel in a simple manner.
  • the filter element 19 is attached to these grooves 27 in the area of the glass fiber plastic extrusion coating 25.
  • the filter element 19 is supported on a shoulder 29 of the support tube 8.
  • the plugged-on filter element 19 has a slightly larger diameter than the support tube 8.
  • an extension sleeve 30, which serves, for example, the connection to a fuel distributor not shown, the outer diameter of the filter element 19 is calibrated to the inner diameter of the extension sleeve 30, which is slightly smaller than the outer diameter of the filter element 19.
  • the filter element 19 is pressed into the grooves 27 of the support tube 8 in the region of the fiberglass extrusion coating 25.
  • a secure hold of the filter element in the fuel injection valve 1 is ensured even with strong temperature fluctuations.
  • the fuel injection valve 1 can be produced by the measures according to the invention in a simple manner by the elimination of the brass ring 20 cheaper without increasing the cost of other components.
  • the invention is not limited to the illustrated embodiment and suitable for any construction of fuel injectors 1, z. B. for fuel injection valves 1 for direct injection or fuel injectors 1 with connection to a common rail system.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (7)

  1. Soupape d'injection de carburant (1) pour des installations d'injection de carburant de moteurs à combustion interne comprenant une bobine magnétique (10), un tube support (8) servant de pôle interne de la bobine magnétique (10) et un élément filtrant (19), l'élément filtrant (19) étant fixé sur un contour extérieur (28) du tube support (8) de la soupape d'injection de carburant (1),
    caractérisée en ce
    qu'un ajustement serré entre l'élément filtrant (19) et le tube support (8) est réalisé par le montage d'une douille de prolongement (30) qui présente un diamètre intérieur qui est légèrement inférieur à un diamètre extérieur de l'élément filtrant (19).
  2. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    le contour extérieur (28) du tube support (8) présente des rainures (27).
  3. Soupape d'injection de carburant selon la revendication 2,
    caractérisée en ce que
    les rainures (27) sont pratiquées dans le tube support (8) par tournage ou en utilisant un acier profilé.
  4. Soupape d'injection de carburant selon l'une quelconque des revendications 1 à 3,
    caractérisée en ce que
    le tube support (8) présente, du côté de la sortie d'écoulement des rainures (27), un épaulement (29).
  5. Soupape d'injection de carburant selon la revendication 4,
    caractérisée en ce que
    l'élément filtrant (19) s'appuie sur l'épaulement (29).
  6. Soupape d'injection de carburant selon l'une quelconque des revendications 1 à 5,
    caractérisée en ce que
    l'élément filtrant (19) se compose d'un filtre en forme de pot (21) constitué d'un matériau en tissu (24) et d'un surmoulage de plastique renforcé par des fibres de verre (25).
  7. Procédé de montage d'une soupape d'injection de carburant (1) pour des installations d'injection de carburant de moteurs à combustion interne comprenant une bobine magnétique (10), un tube support (8) servant de pôle interne de la bobine magnétique (10) et un élément filtrant (19), l'élément filtrant (19) étant fixé sur un contour extérieur (28) du tube support (8) de la soupape d'injection de carburant (1), comprenant les étapes de procédé suivantes :
    - fabrication d'un filtre en forme de pot (21) à partir d'un matériau en tissu (24),
    - surmoulage du filtre (21) avec un surmoulage de plastique renforcé par des fibres de verre (25),
    - introduction de rainures (27) dans le contour extérieur (28) du tube support (8) de la soupape d'injection de carburant (1),
    - enfichage de l'élément filtrant (19) sur le contour extérieur (28) du tube support (8),
    - montage d'une douille de prolongement (30) dont le diamètre intérieur est légèrement inférieur à un diamètre extérieur de l'élément filtrant (19), et
    - pressage du surmoulage de plastique renforcé par des fibres de verre (25) de l'élément filtrant (19) avec les rainures (27) du contour extérieur (28) du tube support (8) par la pression de montage de la douille de prolongement (30).
EP20040738738 2003-07-30 2004-06-19 Soupape d'injection de carburant et procede de montage de cette soupape Expired - Fee Related EP1651860B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003134785 DE10334785A1 (de) 2003-07-30 2003-07-30 Brennstoffeinspritzventil und Verfahren zu dessen Montage
PCT/DE2004/001289 WO2005014999A1 (fr) 2003-07-30 2004-06-19 Soupape d'injection de carburant et procede de montage de cette soupape

Publications (2)

Publication Number Publication Date
EP1651860A1 EP1651860A1 (fr) 2006-05-03
EP1651860B1 true EP1651860B1 (fr) 2012-09-05

Family

ID=34088949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040738738 Expired - Fee Related EP1651860B1 (fr) 2003-07-30 2004-06-19 Soupape d'injection de carburant et procede de montage de cette soupape

Country Status (5)

Country Link
US (1) US7770812B2 (fr)
EP (1) EP1651860B1 (fr)
JP (1) JP4709753B2 (fr)
DE (1) DE10334785A1 (fr)
WO (1) WO2005014999A1 (fr)

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DE102007008863A1 (de) * 2005-08-26 2008-08-28 Robert Bosch Gmbh Brennstoffeinspritzventil
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US20090256009A1 (en) * 2008-04-10 2009-10-15 Perry Robert B Protection device for a lower guide system of a fuel injector
JP4628461B2 (ja) * 2008-10-24 2011-02-09 三菱電機株式会社 燃料噴射弁
US8460422B2 (en) * 2010-09-17 2013-06-11 Caterpillar Inc. Exhaust aftertreatment system, and engine service package having fuel filtering mechanism
US8413913B2 (en) * 2010-10-28 2013-04-09 International Engine Intellectual Property Company, Llc. Boundary edge filter of a unit fuel injector
DE102011089247A1 (de) * 2011-12-20 2013-06-20 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102012201940A1 (de) * 2012-02-09 2013-08-14 Robert Bosch Gmbh Ventil zum Zumessen eines strömenden Mediums
EP2811152B1 (fr) 2013-06-04 2018-04-18 Continental Automotive GmbH Filtre pour une soupape d'injection de fluide, soupape d'injection de fluide et procédé de fabrication d'un filtre destiné à une soupape d'injection de fluide
DE102013225834A1 (de) * 2013-12-13 2015-06-18 Robert Bosch Gmbh Brennstoffeinspritzventil
EP3076004B1 (fr) * 2015-04-02 2018-09-12 Continental Automotive GmbH Ensemble de soupape avec un élément de retenue de particules et soupape de fluide
LT6299B (lt) * 2015-09-04 2016-08-25 UAB "Aukšto slėgio filtravimo sprendimai" Didelio slėgio filtras skysčiui filtruoti turintis tvirtumo strypą ir to filtro panaudojimas kuro tiekimo sistemoje
DE102015217673A1 (de) 2015-09-15 2017-03-16 Continental Automotive Gmbh Einspritzvorrichtung zur Zumessung eines Fluids und Kraftfahrzeug mit einer derartigen Einspritzvorrichtung
EP3435100B1 (fr) 2017-07-24 2020-04-01 TDK-Micronas GmbH Procédé pour tester un dispositif électronique et un circuit d'interface associé
US10502112B2 (en) * 2017-09-14 2019-12-10 Vitesco Technologies USA, LLC Injector for reductant delivery unit having fluid volume reduction assembly
US10539057B2 (en) * 2017-09-14 2020-01-21 Vitesco Technologies USA, LLC Injector for reductant delivery unit having reduced fluid volume
US20190078488A1 (en) * 2017-09-14 2019-03-14 Continental Automotive Systems, Inc. Injector for reductant delivery unit having fluid volume reduction assembly
US10947880B2 (en) * 2018-02-01 2021-03-16 Continental Powertrain USA, LLC Injector for reductant delivery unit having fluid volume reduction assembly
US11098685B2 (en) * 2019-02-19 2021-08-24 Caterpillar Inc. Fuel injector assembly having external filter and method of making same
DE102019218092A1 (de) * 2019-11-22 2021-05-27 Robert Bosch Gmbh Elektromagnetische Betätigungseinrichtung
DE102021205042A1 (de) * 2021-05-18 2022-11-24 Robert Bosch Gesellschaft mit beschränkter Haftung Injektor mit integriertem Filter

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Also Published As

Publication number Publication date
JP4709753B2 (ja) 2011-06-22
EP1651860A1 (fr) 2006-05-03
DE10334785A1 (de) 2005-02-24
JP2007500301A (ja) 2007-01-11
US20070095745A1 (en) 2007-05-03
WO2005014999A1 (fr) 2005-02-17
US7770812B2 (en) 2010-08-10

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