EP1913252A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1913252A1
EP1913252A1 EP06777975A EP06777975A EP1913252A1 EP 1913252 A1 EP1913252 A1 EP 1913252A1 EP 06777975 A EP06777975 A EP 06777975A EP 06777975 A EP06777975 A EP 06777975A EP 1913252 A1 EP1913252 A1 EP 1913252A1
Authority
EP
European Patent Office
Prior art keywords
sealing body
fuel injection
injection valve
valve
valve according
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.)
Granted
Application number
EP06777975A
Other languages
German (de)
English (en)
Other versions
EP1913252B1 (fr
Inventor
Ferdinand Reiter
Christof Vogel
Chris Louis
Gerald Scheday
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 EP1913252A1 publication Critical patent/EP1913252A1/fr
Application granted granted Critical
Publication of EP1913252B1 publication Critical patent/EP1913252B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F02M51/0671—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
    • F02M61/168—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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • a fuel injection valve is known, the one surrounded by a hfegnetspule core, an armature through which a valve seat with a fixed valve seat ch fundamentalITY is actuated by means of a welded to the anchor connection pipe, a tubular metal intermediate part with its one end with an armature facing the end of the core and with its other end with a tubular connecting part by welding is tightly connected, and at least one JVkgnetspule cross bügeiförmige Leite ele- umiasst, with its valve the valve body facing end with the connecting part and with its other end is connected to the core by welding.
  • the welding takes place in each case two overlapping components of the fuel injection valve in a cross-sectional reduction of one of the two parts to be welded.
  • the fiction, contemporary fuel injector with the characterizing ⁇ ferkmalen the main claim has the advantage that between the valve body, a valve sleeve and a lVkgnetspule a reliable seal by a fuel-resistant elastomer is axially possible.
  • This seal is preferably made of rubber in cross-section quadrangular sealing body, which has the advantage that the sealing body used is simple and inexpensive.
  • Another advantage is that the sealing body within the fuel injection valve has only a small footprint, which is further reduced by the fact that the sealing body is clamped and pressed in the installed state after the Mmtage.
  • the sealing body is particularly advantageous to insert the sealing body in the region between an underside of a coil carrier accommodating the jaw coil, an outer surface of a valve sleeve and a radially extending shoulder of the valve housing. Ln completely built-in condition, the Dichtgro ⁇ er fills this Aufhahme Scheme largely and guaranteed by its direct body contact with these valve components a safe and reliable seal.
  • the sealing body ultimately has an elliptical or egg-shaped cross-section in the compressed state.
  • the coil carrier can ideally have on its underside a circumferential collar or a plurality of nubs distributed over the circumference, which delimit the receiving area of the sealing body radially outwards.
  • FIG. 1 shows a schematic section through an embodiment of a fiction, designed according to fuel injection valve.
  • Figure 2 is a schematic partial section through the fiction, designed according to fuel injector in the section IV in Figure 1 with a not yet pressed sealing body
  • Figure 3 is an enlarged view of the sealing body in cross section
  • Figure 4 is a schematic partial section through the fiction, designed according to fuel injector in the field of Section IV in Figure 1 with a pressed after the Mmtage in the installed state sealing body.
  • FIG. Figure 1 shows a schematic sectional view of a longitudinal section through an embodiment of a fiction, designed according to fuel injector 1, which is particularly suitable for injecting BrennstofFin not shown suction pipe of an internal combustion engine.
  • the fuel injection valve 1 includes a JVkgnetspule 2, which is wound on a bobbin 3.
  • the bobbin 3 is in a topflörmigen valve housing 4, which serves as lVkgnettopf the electromagnetic circuit, encapsulated.
  • the bobbin 3 is penetrated by a valve sleeve 5, which is designed tubular.
  • a valve sleeve 5 On the outflow side of an arranged in the valve sleeve 5 inner pole 6, an armature 7 is arranged, which is connected to a valve needle 8.
  • the valve needle 8 is in operative connection with a ball valve in the exemplary embodiment of the invention, which forms a sealing seat 11 with a valve 11. Downstream of the sealing seat, at least one Abspritzöffiiung 13 is formed, from which the BrennstofFin the suction pipe not shown is injected.
  • the armature 7 is acted upon in the resting state of the fuel injection valve 1 by a return spring 14 with a force such that the fuel injection valve 1 is kept closed by the pressure of the valve chsted emotionss 10 on the valve 11 itzharm.
  • Return spring 14 is disposed in a recess 15 of the armature 7 and the inner pole 6 and is brought by a EinsteHhülse 16 to bias.
  • a cup-shaped filter element 17 is preferably pressed into the valve sleeve 5.
  • the fuel which is supplied via a central fuel supply 18, flows through the fuel injection valve 1 through a feed pipe 24, the recess 15 and flows to the valve body 11 and the injection opening 13.
  • the fuel injection valve 1 is provided in the region of the central fuel supply 18 with a seal 19. Another seal 20 seals the connection, not shown, between the fuel injection valve 1 and the intake manifold.
  • the JVkgnetspule 2 is energized via a line from a via an electrical plug contact 21 feedable electrical current.
  • the plug-in contact 21 is part of an electrical connector plug 22 made of plastic, which can be molded with a plastic extrusion on the valve housing 4, on the valve sleeve 5 and on the supply pipe 24.
  • the fuel injection valve 1 is closed as soon as the JVkgnetspule 2 exciting current is turned off and the JVkgnetfeld degraded so far that the return spring 14 the armature 7 deprives from the inner pole 6, whereby the valve needle 8 moves in the outflow direction and the valve chambamatichan 10 on the valve itzmati 11 touches down.
  • valve sleeve 5 is designed tubular. Between the valve housing 4, coil support 3 and valve sleeve 5 is fiction, according to a sealing body 25 made of an elastomeric material, preferably made of rubber, which represents a reliable sealing of the valve sleeve 5 relative to the valve housing 4.
  • FIG 2 shows a schematic partial section through the fiction, designed according to the fuel injector 1 in the region of the section IV in Figure 1 with a not yet pressed sealing body 25.
  • the sealing body 25 is square-shaped and trapezoidally similar in cross section. The installation of the sealing body 25 is carried out such that the sealing body 25 is inserted into the region between a bottom 27 of the bobbin 3, an outer vvrtelflache 28 of the valve sleeve 5 and a radially extending shoulder 29 of the valve housing 4. While the valve housing 4 is already fastened or held on the valve sleeve 5, the coil carrier 3 with the IV coil 2 is pushed into the valve housing 4 only after the introduction of the sealing body 25. At this line point, the sealing body 25 is in an unstressed state with a annular contour and a rectangular cross-section, as shown in Figure 3, before.
  • the sealing body 25 rather extends with its inner side 30 slightly inclined to the longitudinal axis of the fuel injection valve 1 and thus inclined to Mintelftambae 28 of the valve sleeve 5 and the outer side 31 of the sealing body 25. Therefore, the cross section of the sealing body 25 also describes no ideal trapezoid, but he has only close to this form.
  • the bobbin 3 facing upper side 32 of the sealing body 25 extends obliquely inclined to the longitudinal axis of the fuel injection valve 1, e.g.
  • the edges of the sealing body 25 are e.g. rounded, the radii of all rounded edges may be different.
  • the bobbin 3 has on its underside 27 on a radially encircling collar 12 which is arranged radially outside of the sealing body 25 and which rests in a clamped state of the sealing body 25 on the shoulder 29 of the valve housing 4 ( Figure 4).
  • a plurality of knobs may also be mounted radially symmetrically on the underside 27 of the coil carrier 3.
  • FIG. 4 shows a schematic partial section through the fuel injection valve 1 designed according to the invention in the region of the section IV in FIG. 1 with a sealing body 25 compressed in the installed state after the installation.
  • the elastomer material of the sealing body 25 moves largely radially outwards .
  • the secondary differs slightly in others
  • the invention is not limited to the illustrated embodiment. In particular, any combinations of the different ⁇ ferkmale possible.

Landscapes

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

Abstract

L'invention concerne une soupape d'injection de carburant (1) comprenant une bobine d'excitation (2) qui coopère avec un induit (7) qui est soumis à l'action d'un ressort de rappel (14) et qui forme une partie de soupape à mouvement axial en association avec une aiguille d'injection (8). Un corps de fermeture de soupape (10) est prévu sur l'aiguille d'injection (8) et forme un siège étanche avec un corps de siège de soupape (11). En outre, un manchon de soupape (5) à paroi mince ou la bobine d'excitation (2) comporte un élément d'étanchéification fiable constitué d'un corps étanche (25) qui est disposé en dessous de la bobine d'excitation (2). La section transversale dudit corps étanche (25) est quadrangulaire, en particulier trapézoïde, et ce corps étanche s'étend entre la bobine d'excitation (2) et une cage de soupape (4). A l'état monté, le corps étanche (25) est encastré et serré. Ainsi, à l'état serré, le corps étanche (25) présente une section transversale ellipsoïdale ou ovoïde.
EP06777975.1A 2005-08-04 2006-07-26 Soupape d'injection de carburant Active EP1913252B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005037319A DE102005037319A1 (de) 2005-08-04 2005-08-04 Brennstoffeinspritzventil
PCT/EP2006/064660 WO2007014887A1 (fr) 2005-08-04 2006-07-26 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1913252A1 true EP1913252A1 (fr) 2008-04-23
EP1913252B1 EP1913252B1 (fr) 2017-09-13

Family

ID=37003371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06777975.1A Active EP1913252B1 (fr) 2005-08-04 2006-07-26 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US8770498B2 (fr)
EP (1) EP1913252B1 (fr)
JP (1) JP4741670B2 (fr)
DE (1) DE102005037319A1 (fr)
WO (1) WO2007014887A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4897728B2 (ja) * 2008-03-18 2012-03-14 株式会社ケーヒン 電磁式燃料噴射弁
DE102009000872B4 (de) * 2009-02-16 2018-05-30 Robert Bosch Gmbh Einspritzventil
DE102012204305A1 (de) * 2012-03-19 2013-09-19 Robert Bosch Gmbh Dicht umspritztes Bauelement und Verfahren zum Erstellen eines solchen Bauelements
EP2940286A1 (fr) * 2014-05-01 2015-11-04 Delphi International Operations Luxembourg S.à r.l. Filtre d'injecteur de carburant

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4003227C1 (en) 1990-02-03 1991-01-03 Robert Bosch Gmbh, 7000 Stuttgart, De EM fuel injection valve for IC engine - has two overlapping parts welded together as narrowed section of one part
JP2521825Y2 (ja) * 1991-02-28 1997-01-08 愛三工業株式会社 燃料噴射装置
JPH0849624A (ja) * 1994-06-01 1996-02-20 Zexel Corp 電磁式燃料噴射弁の燃料侵入防止装置
US5918818A (en) * 1996-05-22 1999-07-06 Denso Corporation Electromagnetically actuated injection valve
JPH1144275A (ja) 1997-07-03 1999-02-16 Zexel Corp 燃料噴射装置用ソレノイドバルブ
DE19744739A1 (de) * 1997-10-10 1999-04-15 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19808067A1 (de) * 1998-02-26 1999-09-02 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
JPH11280592A (ja) * 1998-03-25 1999-10-12 Unisia Jecs Corp フューエルインジェクタ
JP2003269290A (ja) 2002-03-19 2003-09-25 Denso Corp 燃料噴射弁
JP3945357B2 (ja) * 2002-09-18 2007-07-18 株式会社デンソー 燃料噴射装置
DE10332348A1 (de) * 2003-07-16 2005-02-03 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004047179A1 (de) * 2004-09-29 2006-03-30 Robert Bosch Gmbh Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007014887A1 *

Also Published As

Publication number Publication date
US8770498B2 (en) 2014-07-08
JP2009508030A (ja) 2009-02-26
DE102005037319A1 (de) 2007-02-08
WO2007014887A1 (fr) 2007-02-08
US20090179091A1 (en) 2009-07-16
EP1913252B1 (fr) 2017-09-13
JP4741670B2 (ja) 2011-08-03

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