EP1402176B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1402176B1
EP1402176B1 EP02742710A EP02742710A EP1402176B1 EP 1402176 B1 EP1402176 B1 EP 1402176B1 EP 02742710 A EP02742710 A EP 02742710A EP 02742710 A EP02742710 A EP 02742710A EP 1402176 B1 EP1402176 B1 EP 1402176B1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injection
injection valve
fuel
protection screen
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
EP02742710A
Other languages
German (de)
English (en)
Other versions
EP1402176A1 (fr
Inventor
Günter DANTES
Detlef Nowak
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 EP1402176A1 publication Critical patent/EP1402176A1/fr
Application granted granted Critical
Publication of EP1402176B1 publication Critical patent/EP1402176B1/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
    • 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
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating 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
    • 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
    • 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
    • F02M2200/06—Fuel-injection apparatus having means for preventing coking, e.g. of fuel injector discharge orifices or valve needles
    • 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
    • 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
    • F02M61/168—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
    • 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 is based on a fuel injection valve according to the preamble of the main claim.
  • a Fuel injector includes the fuel in one combustion chamber formed by a piston / cylinder construction injected, and with a protruding into the combustion chamber Spark plug is provided.
  • the fuel injection valve is with at least one row over the circumference of the Fuel injector arranged distributed Provided injection holes. Through a targeted injection of fuel through the injection holes becomes one beam-guided combustion process by forming a Mixture cloud realized with at least one jet.
  • a disadvantage of the above-mentioned document known fuel injection valve is in particular the Coking of the ejection openings, which thereby clog and the flow through the fuel injector diminish impermissibly. This leads to malfunctions the internal combustion engine.
  • WO 95/17595 A1 is a fuel injection valve with a Zerstäubungssieb for the supply of internal combustion engines with fuel or fuel-gas mixtures known.
  • the sputtering sieve provides a protective shield against icing, plugging and deposits chemical substances inside the fuel injection valve represents.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that a downstream of the Spray openings arranged Flammschutzsieb the Temperature of the flame front of the blowing mixture cloud reduced so much in the area of the injection openings, that no fuel precipitate on the valve seat body can, whereby a growth of the injection openings through Coking residue is avoided.
  • the flameproof screen is made of a Wire mesh produced by means of a Mounting ring is attached to the valve seat body.
  • the Flammtiksieb is also produced from a sheet, which by drilling, punching or etching with openings can be provided.
  • a further advantage is that the fastening ring the Flame protection screen in a direction of flow of the fuel surmounted axially, since thereby the flameproof screen before the in Combustion chamber is shielded and circulating flow Fuel can not precipitate on the flameproof screen.
  • Fig. 1 shows in an excerpted sectional view Embodiment of an inventive Fuel Injector 1.
  • the fuel injector 1 is in the form of a fuel injection valve 1 for Fuel injection systems of mixture compression, spark-ignited internal combustion engines running.
  • the Fuel injector 1 is suitable for direct Injecting fuel into a not shown Combustion chamber 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 for example via a weld 41 in operative connection with a valve closing body 4, the arranged with a valve seat body 5 on a Valve seat surface 6 cooperates to a sealing seat.
  • Fuel injection valve 1 is in Embodiment to an inwardly opening Fuel injection valve 1, which over two Spray openings 7 has.
  • the valve closing body 4 of the inventively designed Fuel injection valve 1 has a nearly spherical Shape up. As a result, an offset-free, gimbaled Valve needle guide achieved for a precise Operation of the fuel injection valve 1 provides.
  • the valve seat body 5 of the fuel injection valve 1 is For example, cup-shaped and carries by his Form for valve needle guide at.
  • the valve seat body 5 is while in a spray-side recess 34 of the nozzle body 2 used and by means of a weld 35 with the Nozzle body 2 connected.
  • the nozzle body 2 is by a seal 8 against a Outer pole 9 acting as an actuator for the valve needle 3 Magnetic coil 10 sealed.
  • the magnetic coil 10 is in one Coil housing 11 encapsulated and on a bobbin 12th wound, which at an inner pole 13 of the magnetic coil 10th is applied.
  • the inner pole 13 and the outer pole 9 are connected by a Split 26 separated from each other and rely on a Connecting component 29 from.
  • the magnetic coil 10 is connected via a Line 19 of a via an electrical plug contact 17th energized electric current.
  • the plug contact 17 is surrounded by a plastic sheath 18, the Inner pole 13 may be molded.
  • the valve needle 3 is in a valve needle guide fourteenth guided, which is designed disk-shaped. to Stroke adjustment is a paired shim 15.
  • An the other side of the dial 15 is a Anchor 20. This is about a first flange 21st non-positively connected to the valve needle 3 in conjunction, which by a weld 22 with the first flange 21 connected is.
  • On the first flange 21 is supported Return spring 23 from which in the present design of Fuel injection valve 1 by a sleeve 24 Bias is brought.
  • a second flange 31st Downstream of the armature 20 is a second flange 31st arranged, which serves as a lower anchor stop. He is over a weld 33 frictionally with the valve needle. 3 connected. Between the armature 20 and the second flange 31 is an elastic intermediate ring 32 for damping Anchor bouncers when closing the fuel injector 1 arranged.
  • the fuel injection valve 1 at the Valve seat body 5, which in a recess 34 of the Nozzle body 2 arranged and for example by means of a Weld 35 is connected to this, a flameproof screen 37, which downstream of the ejection openings. 7 is attached by means of a fastening ring 38. It diminished by its arrangement downstream of the Spray holes 7 the coking tendency and bows so Malfunction of the fuel injection valve 1 by Clogging of the ejection openings 7 and an impermissible Reduction of the fuel flow before. Of the discharge-side part of the fuel injection valve 1 with the measures according to the invention is closer in Fig. 2 illustrated and explained.
  • the armature 20 drops sufficient reduction of the magnetic field by the pressure of the Return spring 23 on the first flange 21 from the inner pole thirteenth from, causing the valve needle 3 against the stroke direction emotional. As a result, the valve closing body 4 is placed on the Valve seat surface 6, and the fuel injection valve. 1 will be closed. The armature 20 sits on the through the second flange 31 formed anchor stop.
  • Fig. 2 shows in an excerpted sectional view of the in Fig. 1 denoted by II section of the in Fig. 1st illustrated embodiment of an inventive designed fuel injection valve. 1
  • valve seat body 5 in the embodiment at a no further illustrated combustion chamber facing the outer end face 39 a fastening ring 38 through which a Flammtiksieb 37 on the downstream side of the Valve seat body 5 is fixed.
  • the fastening ring can doing so for example by means of a weld 40 am Valve seat body 5 to be fixed and relies on a Paragraph 43 of the valve seat body 5 from.
  • the coking of Spray openings 7 can be reduced. Because the diameter of the Spray openings 7 is typically about 100 microns, is the risk that the ejection openings 7 by coking with clog the time and thus the flow rate inadmissible is severely restricted, relatively large. This is in particular by the high temperatures during ignition the injected into the combustion chamber mixture cloud, since thereby components of the fuel at the top of the Deposit fuel injector 1.
  • the flameproof screen 37 By attachment of the flameproof screen 37, the surface temperature in the Exit region of the spray openings 7 so far reduced be that the ejection openings 7 not through Coking residues can grow.
  • the flameproof screen 37 which thus has the function of a flame retardant, prevents the spread of the flame front in the area between the flameproof screen 37 and the valve seat body 5.
  • the above mentioned flame retardance function of the Flammschutzsiebes 37 can by a corresponding Shape of the valve seat body 5 and the Mounting ring 38 are supported.
  • the Flammtiksieb closes, as already explained, the Exit region of the ejection openings 7 against the combustion chamber from, whereby a Abspritz Scheme 44 delimited against this becomes.
  • the mounting ring 38 is shaped so that it Shape of the valve seat body 5 in the region of the injection area 44 continues in Abspritzides, so that in total gives a funnel-shaped shape of the Abspritz Schemes.
  • attachment ring 38 projects beyond the flameproof screen 37 in the axial direction, so that in addition to the Flame retardant function of the flameproof screen 37 also the Mounting ring 38 a shielding function against the downstream end 42 of the fuel injection valve. 1 takes over, since he has the Flammtiksieb 37 against the Combustion chamber flows, which are tangent to the To circulate fuel injector 1 in the combustion chamber, shields.
  • the flameproof screen 37 preferably consists, as in FIG. 3 represented, from a network of metal wires, it is however, also conceivable, a correspondingly shaped sheet, such as shown in Fig. 4, e.g. by drilling, punching or Etching to provide openings.
  • the invention is not limited to those shown Embodiments limited and for any construction of fuel injection valves 1 applicable.

Landscapes

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

Claims (8)

  1. Injecteur de carburant (1) pour injecter directement du carburant dans une chambre de combustion d'un moteur à combustion interne comprenant un actionneur (10), une aiguille de soupape qui peut être commandée par l'actionneur (10) pour commander un corps de fermeture de soupape (4) qui forme un siège d'étanchéité conjointement avec une surface de siège de soupape (6) formée sur un corps de siège de soupape (5), avec au moins une ouverture d'éjection (7) formée dans le corps de siège de soupape (5),
    caractérisé en ce que
    l'extrémité de sortie (42) de l'injecteur de carburant (1), comporte une grille pare-flammes (37) qui protège les ouvertures d'éjection (7) par rapport à la chambre de combustion du moteur à combustion interne, et
    la grille pare-flammes (37) est montée à l'extrémité de sortie de l'injecteur de carburant (1) à l'aide d'une bague de fixation (38) formée en prolongement de la forme du corps de siège de soupape (5) en direction d'éjection dans la région d'une zone d'éjection (44).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la bague de fixation (38) est fixée au corps de siège de soupape (5) par un cordon de soudure (40).
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    par rapport à la chambre de combustion la grille pare-flammes (37) délimite une zone d'éjection (44) située entre le support de corps de soupape (5) et la grille pare-flammes (37).
  4. Injecteur de carburant selon l'une des revendications 1 à 3,
    caractérisé en ce que
    la grille pare-flammes (37) est un tamis de fils métalliques.
  5. Injecteur de carburant selon l'une des revendications 1 à 3,
    caractérisé en ce que
    la grille pare-flammes (37) est une tôle dans laquelle sont pratiquées des ouvertures.
  6. Injecteur de carburant selon la revendication 5,
    caractérisé en ce que
    les ouvertures sont pratiquées dans la tôle par matriçage, par perçage ou par gravure.
  7. Injecteur de carburant selon l'une des revendications 1 à 6,
    caractérisé en ce que
    la bague de fixation (38) s'appuie sur un épaulement (43) du corps de siège de soupape (5).
  8. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    la bague de fixation (38) est formée de telle manière qu'elle dépasse axialement la grille pare-flammes (37) dans une direction de sortie.
EP02742710A 2001-06-22 2002-05-07 Soupape d'injection de carburant Expired - Lifetime EP1402176B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10130206 2001-06-22
DE10130206A DE10130206A1 (de) 2001-06-22 2001-06-22 Brennstoffeinspritzventil
PCT/DE2002/001629 WO2003001053A1 (fr) 2001-06-22 2002-05-07 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1402176A1 EP1402176A1 (fr) 2004-03-31
EP1402176B1 true EP1402176B1 (fr) 2005-04-27

Family

ID=7689116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02742710A Expired - Lifetime EP1402176B1 (fr) 2001-06-22 2002-05-07 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US7014129B2 (fr)
EP (1) EP1402176B1 (fr)
JP (1) JP2004521254A (fr)
KR (1) KR100853642B1 (fr)
DE (2) DE10130206A1 (fr)
WO (1) WO2003001053A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10314670A1 (de) * 2003-04-01 2004-10-14 Robert Bosch Gmbh Verfahren zur Herstellung und Befestigung einer Lochscheibe
US7124963B2 (en) * 2004-11-05 2006-10-24 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
JP4511960B2 (ja) * 2005-01-26 2010-07-28 株式会社ケーヒン 燃料噴射弁
JP4502829B2 (ja) * 2005-01-27 2010-07-14 株式会社ケーヒン 燃料噴射弁
JP4502828B2 (ja) * 2005-01-27 2010-07-14 株式会社ケーヒン 燃料噴射弁
JP4490840B2 (ja) * 2005-01-28 2010-06-30 株式会社ケーヒン 燃料噴射弁
US7669789B2 (en) * 2007-08-29 2010-03-02 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US20090057446A1 (en) * 2007-08-29 2009-03-05 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US20090090794A1 (en) * 2007-10-04 2009-04-09 Visteon Global Technologies, Inc. Low pressure fuel injector
US9822969B2 (en) * 2010-11-30 2017-11-21 General Electric Company Fuel injector having tip cooling
WO2012086006A1 (fr) * 2010-12-20 2012-06-28 トヨタ自動車株式会社 Injecteur de carburant
US20140116391A1 (en) * 2012-10-31 2014-05-01 Electro-Motive Diesel, Inc. Fuel system having an injector blocking member
JP5983795B2 (ja) * 2015-02-09 2016-09-06 株式会社デンソー 燃料噴射弁
DE102015225055A1 (de) * 2015-12-14 2017-06-14 Robert Bosch Gmbh Kraftstoffinjektor
DE102015226769A1 (de) * 2015-12-29 2017-06-29 Robert Bosch Gmbh Brennstoffeinspritzventil
GB2552673B (en) * 2016-08-02 2020-02-19 Delphi Tech Ip Ltd SCR doser spray atomization
US10865754B2 (en) * 2017-04-05 2020-12-15 Progress Rail Services Corporation Fuel injector having needle tip and nozzle body surfaces structured for reduced sac volume and fracture resistance

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030668A (en) * 1976-06-17 1977-06-21 The Bendix Corporation Electromagnetically operated fuel injection valve
JP3512807B2 (ja) * 1993-12-21 2004-03-31 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 霧化シーブおよび霧化シーブを備えた燃料噴射弁
DE4435270A1 (de) 1994-10-01 1996-04-04 Bosch Gmbh Robert Brennstoffeinspritzvorrichtung
US5765750A (en) * 1996-07-26 1998-06-16 Siemens Automotive Corporation Method and apparatus for controlled atomization in a fuel injector for an internal combustion engine
DE19804463B4 (de) 1998-02-05 2006-06-14 Daimlerchrysler Ag Kraftstoffeinspritzsystem für Ottomotoren
DE19900231A1 (de) 1999-01-07 2000-07-20 Deutsch Zentr Luft & Raumfahrt Verbrennungsmotor
DE10130685A1 (de) * 2001-06-26 2003-01-02 Bosch Gmbh Robert Brennstoffeinspritzventil

Also Published As

Publication number Publication date
KR100853642B1 (ko) 2008-08-25
WO2003001053A1 (fr) 2003-01-03
US7014129B2 (en) 2006-03-21
EP1402176A1 (fr) 2004-03-31
US20040099243A1 (en) 2004-05-27
DE10130206A1 (de) 2003-02-06
KR20030023760A (ko) 2003-03-19
JP2004521254A (ja) 2004-07-15
DE50202925D1 (de) 2005-06-02

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