EP1425508B1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP1425508B1
EP1425508B1 EP02747214A EP02747214A EP1425508B1 EP 1425508 B1 EP1425508 B1 EP 1425508B1 EP 02747214 A EP02747214 A EP 02747214A EP 02747214 A EP02747214 A EP 02747214A EP 1425508 B1 EP1425508 B1 EP 1425508B1
Authority
EP
European Patent Office
Prior art keywords
armature
valve
valve needle
fuel injection
damping element
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 - Lifetime
Application number
EP02747214A
Other languages
German (de)
English (en)
Other versions
EP1425508A1 (fr
Inventor
Andreas Glaser
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 EP1425508A1 publication Critical patent/EP1425508A1/fr
Application granted granted Critical
Publication of EP1425508B1 publication Critical patent/EP1425508B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
    • 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
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • a disadvantage is in particular the complex design with an additional component. Also, the large-area elastomer ring is unfavorable for the course of the magnetic field and makes it difficult to close the field lines and thus the achievement of high attraction forces in the opening movement of the fuel injection valve.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that a damping element dampens the armature and the valve needle radially against each other by a hollow cylindrical elastomeric part pushed onto the valve needle and the two components are inserted together in a recess of the armature. As a result, both the needle bouncer and the bounce bouncer are effectively damped.
  • the surfaces of the damping element are vulcanized to produce better adhesion between the elastomeric damping element and the metallic components valve needle and armature.
  • FIG. 1 An illustrated in Fig. 1 embodiment of an inventively designed fuel injector 1 is carried out in the form of a fuel injection valve for fuel injection systems of mixture-compression, spark-ignited internal combustion engines.
  • the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is in operative connection with the valve closing body 4, which cooperates with a arranged on a valve seat body 5 valve seat surface 6 to a sealing seat.
  • the fuel injection valve 1 in the exemplary embodiment is an inwardly opening fuel injection valve 1 which has an injection opening 7.
  • the nozzle body 2 is sealed by a seal 8 against the outer pole 9 of a magnetic coil 10.
  • the magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the inner pole 13 and the outer pole 9 are separated from each other by a constriction 26 and connected to each other by a non-ferromagnetic connecting member 29.
  • the magnetic coil 10 is energized via a line 19 from a via an electrical plug contact 17 can be supplied with electric current.
  • the plug contact 17 is surrounded by a plastic casing 18, which may be molded on the inner
  • valve needle 3 is guided in a valve needle guide 14, which is designed disk-shaped.
  • armature 20 On the other side of the dial 15 is the armature 20. This is connected via a first flange 21 frictionally with the valve needle 3 in connection, which is connected by a weld 22 with the first flange 21.
  • a return spring 23 On the first flange 21, a return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by a sleeve 24 to bias.
  • a second flange 31 is arranged, which by means of a weld 33 frictionally with the valve needle 3 is in communication and serves as a lower anchor stop.
  • the armature 20 and the valve seat body 5 run fuel channels 30a to 30c.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel injection valve 1 is exhausted by a seal 28 against a fuel line, not shown.
  • the fuel injection valve 1 in a recess 34 of the armature 20 on a damping element 32 which is formed as a hollow cylinder and is penetrated by the valve needle 3.
  • the damping element 32 may consist of an elastomer, for example of rubber, which by vulcanization so with the armature 20th on the one hand and the valve needle 3 on the other hand is in frictional connection, that the axial movements of said components are mutually attenuated, whereby Ankeranschlagspreller both when opening in the upper and closing the fuel injector 1 in the lower stroke position of the armature 20 can be avoided.
  • the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 counter to its stroke direction so that the valve closing body 4 is held on the valve seat 6 in sealing engagement. Upon energization of the solenoid coil 10, this builds up a magnetic field, which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, wherein the stroke is determined by a located in the rest position between the inner pole 12 and the armature 20 working gap 27.
  • the armature 20 takes the first flange 21, which is welded to the valve needle 3, also in the stroke direction with.
  • the valve closing body 4 communicating with the valve needle 3 lifts off from the valve seat surface 6 and the fuel is sprayed off through the injection opening 7.
  • the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 from the inner pole 13, whereby the valve connected to the needle 3 in communication first flange 21 moves against the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, whereby the valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • FIG. 2 shows in an excerpted sectional view an enlarged view of the region II in FIG. 1.
  • the armature 20 is shown with the damping element 32 and For the sake of clarity, the illustration of the other components located in this area has been dispensed with.
  • the fuel injection valve 1 in its preferred embodiment has a damping element 32, which is arranged in an axial recess 34 of the armature 20.
  • the damping element 32 is formed as a hollow cylinder and preferably made of an elastomer material, such as rubber.
  • the damping element 32 is provided with vulcanized layers 35a and 35b, which rest against the recess 34 of the armature 20 and the valve needle 3 and by pressure and static friction forces for an elastic connection between Armature 20 and valve needle 3 provide.
  • the damping element 32 is limited in its axial length only by the axial length of the recess 34 of the armature 20. The selection of the length and the wall thickness of the damping element 32 is carried out mainly according to the aspects of manufacturing and assembly technology and durability in continuous operation.
  • the movements of the armature 20 and the valve needle 3 can be effectively mutually damped, whereby Ankerpreller be avoided on the first sleeve 21 when opening the fuel injection valve 1 and the second sleeve 31 when closing the fuel injection valve 1.
  • the movement of the valve needle 3 is damped, so that on the other hand omitted valve needle preller in the sealing seat.
  • the dynamics of the fuel injection valve 1 improves, so that shorter opening and closing times in conjunction with faster switching cycles and smaller and more accurate Zumeßmengen can be realized.
  • the invention is not limited to the illustrated embodiment and z. B. also suitable for outward opening fuel injectors 1.

Landscapes

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

Claims (4)

  1. Injecteur de carburant (1), notamment injecteur de carburant (1) pour systèmes d'injection de moteurs à combustion interne, doté d'un aiguille de soupape (3) coopérant avec une surface de siège de soupape (6) pour former un siège d'étanchéité et d'un induit (20) s'engageant sur l'aiguille de soupape (3), l'induit (20), présentant un évidement (34) le traversant, étant mobile axialement sur le aiguille de soupape (3), et amorti par un élément amortisseur (32) en élastomère,
    caractérisé en ce que
    l'élément amortisseur (32) cylindrique creux pourvu d'une première et d'une deuxième couche vulcanisée est disposé de telle manière dans l'évidement (34) de l'induit (20) et sur l'aiguille de soupape (3) traversant l'élément amortisseur que la première couche vulcanisée est reliée par complémentarité de force à l'évidement de l'induit et que la deuxième couche vulcanisée est reliée par complémentarité de force à l'aiguille de soupape (3) de sorte celle-ci est reliée à l'induit (20) par l'élément amortisseur (32) en direction radiale.
  2. Injecteur de carburant selon l'une des revendications 1,
    caractérisé en ce que
    l'aiguille de soupape (3) peut être poussée avec l'élément amortisseur (32) dans l'évidement (34) de l'induit (20).
  3. Injecteur de carburant selon l'une des revendications 1 à 2,
    caractérisé en ce qu'
    une longueur axiale de l'élément amortisseur (32) est inférieure ou égale à une longueur axiale de l'évidement (34) de l'induit (20).
  4. Injecteur de carburant selon l'une des revendications 1 à 3,
    caractérisé en ce que
    l'induit (20) présente au moins un canal de carburant axial (30a).
EP02747214A 2001-08-20 2002-06-12 Injecteur de carburant Expired - Lifetime EP1425508B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10140795 2001-08-20
DE10140795A DE10140795A1 (de) 2001-08-20 2001-08-20 Brennstoffeinspritzventil
PCT/DE2002/002148 WO2003018994A1 (fr) 2001-08-20 2002-06-12 Injecteur de carburant

Publications (2)

Publication Number Publication Date
EP1425508A1 EP1425508A1 (fr) 2004-06-09
EP1425508B1 true EP1425508B1 (fr) 2006-03-08

Family

ID=7696035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02747214A Expired - Lifetime EP1425508B1 (fr) 2001-08-20 2002-06-12 Injecteur de carburant

Country Status (7)

Country Link
US (1) US6869034B2 (fr)
EP (1) EP1425508B1 (fr)
JP (1) JP2005500471A (fr)
KR (1) KR20040027900A (fr)
AT (1) ATE319928T1 (fr)
DE (2) DE10140795A1 (fr)
WO (1) WO2003018994A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004293308A (ja) * 2003-03-25 2004-10-21 Hitachi Unisia Automotive Ltd 燃料噴射弁
RU2526002C2 (ru) * 2010-05-25 2014-08-20 Борис Константинович Зуев Электроуправляемая форсунка
US9346074B2 (en) 2010-09-13 2016-05-24 Nordson Corporation Conformal coating applicator and method
DE102012202253A1 (de) * 2012-02-15 2013-08-22 Robert Bosch Gmbh Brennstoffeinspritzventil
RU2563052C1 (ru) * 2012-03-23 2015-09-20 Борис Константинович Зуев Электроуправляемая форсунка
DE102012205580A1 (de) * 2012-04-04 2013-10-10 Robert Bosch Gmbh Halter zur Befestigung einer Komponente an einer Brennkraftmaschine, Lagerbuchse für solch einen Halter und Brennstoffeinspritzanlage
EP2703633A1 (fr) * 2012-08-28 2014-03-05 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
DE102012215779A1 (de) 2012-09-06 2014-03-06 Robert Bosch Gmbh Einspritzventil
RU2519538C1 (ru) * 2012-10-29 2014-06-10 Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации Электрогидравлическая форсунка для дизеля
US9228550B2 (en) 2013-03-11 2016-01-05 Stanadyne Llc Common rail injector with regulated pressure chamber

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US63173A (en) * 1867-03-26 Beims of hats
US4766405A (en) * 1987-04-14 1988-08-23 Allied Corporation Dynamic energy absorber
US5299776A (en) * 1993-03-26 1994-04-05 Siemens Automotive L.P. Impact dampened armature and needle valve assembly
DE19756103A1 (de) * 1997-12-17 1999-06-24 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19849210A1 (de) 1998-10-26 2000-04-27 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19950761A1 (de) * 1999-10-21 2001-04-26 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10043085A1 (de) * 2000-09-01 2002-03-14 Bosch Gmbh Robert Brennstoffeinspritzventil

Also Published As

Publication number Publication date
EP1425508A1 (fr) 2004-06-09
JP2005500471A (ja) 2005-01-06
US6869034B2 (en) 2005-03-22
US20040035955A1 (en) 2004-02-26
KR20040027900A (ko) 2004-04-01
ATE319928T1 (de) 2006-03-15
WO2003018994A1 (fr) 2003-03-06
DE10140795A1 (de) 2003-03-06
DE50206027D1 (de) 2006-05-04

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