EP1834080B1 - Soupape d'injection de carburant pour des moteurs a combustion interne - Google Patents

Soupape d'injection de carburant pour des moteurs a combustion interne Download PDF

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Publication number
EP1834080B1
EP1834080B1 EP05818956A EP05818956A EP1834080B1 EP 1834080 B1 EP1834080 B1 EP 1834080B1 EP 05818956 A EP05818956 A EP 05818956A EP 05818956 A EP05818956 A EP 05818956A EP 1834080 B1 EP1834080 B1 EP 1834080B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
knobs
fuel
injection
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.)
Not-in-force
Application number
EP05818956A
Other languages
German (de)
English (en)
Other versions
EP1834080A1 (fr
Inventor
Marco Reuter
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 EP1834080A1 publication Critical patent/EP1834080A1/fr
Application granted granted Critical
Publication of EP1834080B1 publication Critical patent/EP1834080B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M61/1846—Dimensional characteristics of discharge orifices
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
    • 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
    • F02M2200/9038—Coatings

Definitions

  • Fuel injectors as are preferably used for direct injection and auto-ignition internal combustion engines are exposed at its injection-side end, which projects into the combustion chamber, high temperatures, such as those resulting from combustion. Remaining in or near the injection port fuel residues after injection, they may coke through the high temperatures during combustion, so that a corresponding coking layer can form in the injection port or in the region of the exit of the injection port. Over time, this coking layer leads to a narrowing of the injection opening and thus to a change in the injection characteristic and the injected quantity.
  • US 5058810 describes a fuel injection valve wherein the outlet opening is arranged on the outside of the housing.
  • the fuel injection valve according to the invention has the advantage that the injection openings of the fuel injection valve are reliably protected against coking.
  • the injection openings are provided with a plurality of nubs. These nubs are designed in size and shape so that the so-called lotus effect is formed, which reliably prevents an accumulation of material of various kinds.
  • possibly forming residues in the injection openings are removed by the passing fuel in the subsequent injections, so that an unchanged surface of the injection openings is permanently provided.
  • the knobs have a substantially conical shape, so that any depositing coking particles attach only to the tip of the conical nubs and thus only very low adhesion forces between the particles and the dimpled surface is formed. As a result, these particles are easily removed again by the passing fuel and can not accumulate permanently.
  • the nubs can either be the same or have different diameters and heights, which are then preferably stochastically distributed. The diameter of the nubs is preferably 1 to 10 .mu.m, wherein the height of the nubs is preferably in the same order of magnitude.
  • FIG. 1 is a longitudinal section through a fuel injection valve according to the invention shown schematically.
  • the fuel injection valve has a housing 1, which comprises a valve body 3.
  • a bore 5 is formed, which is bounded at its combustion-chamber end by a conical valve seat 8.
  • a valve needle 7 is arranged longitudinally displaceable, which is guided in a guide portion 107 in the bore 5.
  • the valve needle 7 tapers to form a pressure shoulder 12, merges into a shaft region 207 and finally ends at its valve seat facing end in a conical sealing surface 9.
  • a pressure chamber 11 is formed, which is filled via an inlet channel 17 with fuel at high pressure.
  • valve seat 8 a plurality of injection openings 15 are formed, which open into the combustion chamber of the internal combustion engine when the fuel injection valve is installed in a corresponding internal combustion engine.
  • the valve needle 7 cooperates with its sealing surface 9 with the valve seat 8 in such a way that upon contact of the valve needle 7 on the valve seat 8, the pressure chamber 11 is separated from the injection ports 15, while lifted from the valve seat 8 valve needle 7, a fuel flow from the Pressure chamber 11 takes place to the injection openings 15, is injected by the fuel into the combustion chamber of the internal combustion engine.
  • FIG. 2 shows an enlargement of FIG. 1 in the region of the valve seat 8, wherein the area in FIG. 1 denoted by II.
  • the enlarged illustrated injection port 15 has in its inside a plurality of nubs 20 which line the inside.
  • the knobs 20 can continue on the end face 103 of the valve body 3, especially in the area surrounding the outlet openings of the injection openings 15. But it can also be provided to provide the entire surface of the fuel injection valve, which projects into the combustion chamber, with nubs 20.
  • the surface of the injection port 15 gets dirt-repellent properties, which are known as the so-called lotus effect. Dirt or soot particles that deposit on this surface touch the surface only at the tip of the dimples 20, so that only very low adhesion forces between the dirt particle and the surface are present. The dirt or soot particles can then easily be entrained by the fuel flow which flows through the injection opening 15 during the injection, so that no deposits of such particles occur, and the injection opening 15 remains unchanged over the entire service life of the injection valve.
  • FIG. 3a shows the section of III designated by FIG. 2 in an enlarged view.
  • the nubs 20 here have a conical shape and have a diameter d, which is preferably in the range of 1 to 10 microns.
  • the height of the knobs 20 moves in the same order of magnitude, the knobs 20 are arranged very close and between the individual knobs 20 no or very little space is available.
  • FIG. 3b shows a further embodiment in which the studs 20 have a slightly different shape and are rounded.
  • the height of the individual knobs h 1 , h 2 may be different, so that, for example, a stochastic distribution of heights is given. Likewise, it may be provided to distribute the knobs 20 either evenly over the surface or stochastically to distribute, resulting in a non-uniform arrangement of pimples.
  • nubs can be done with different methods. For example, the coating with a corresponding material that forms such a knob-like structure when cured, or the treatment of the surface with a laser or with a sputtering process.
  • knobs in a rounded shape or in the form of cones, other shapes are conceivable such as, for example, pyramids or other tips, which are formed according to dense and small, to prevent the addition of soot and other dirt particles.

Landscapes

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

Claims (7)

  1. Soupape d'injection de carburant pour moteurs à combustion interne, comprenant un boîtier (1) dans lequel est réalisée au moins une ouverture d'injection (15) présentant une ouverture d'entrée et une ouverture de sortie, à travers laquelle du carburant peut être injecté dans une chambre de combustion du moteur à combustion interne, l'ouverture de sortie étant disposée au niveau du côté extérieur du boîtier (1 ; 3), caractérisée en ce que le côté intérieur de l'au moins une ouverture d'injection (15) est pourvu de boursouflures (20).
  2. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que l'ouverture d'injection (15) est réalisée sous forme d'alésage dans le boîtier (1 ; 3).
  3. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que les boursouflures (20) présentent une forme essentiellement conique.
  4. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que les boursouflures (20) présentent des diamètres (d) différents.
  5. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que les boursouflures (20) présentent des hauteurs (h1 ; h2) différentes.
  6. Soupape d'injection de carburant selon la revendication 1, 4 ou 5, caractérisée en ce que les boursouflures (20) sont réparties de manière non uniforme sur la paroi de l'ouverture d'injection (15).
  7. Soupape d'injection de carburant selon la revendication 1 ou 4, caractérisée en ce que les boursouflures (20) présentent un diamètre (d) de 1 à 10 µm.
EP05818956A 2004-12-29 2005-12-06 Soupape d'injection de carburant pour des moteurs a combustion interne Not-in-force EP1834080B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004063165A DE102004063165A1 (de) 2004-12-29 2004-12-29 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/EP2005/056530 WO2006072521A1 (fr) 2004-12-29 2005-12-06 Soupape d'injection de carburant pour des moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1834080A1 EP1834080A1 (fr) 2007-09-19
EP1834080B1 true EP1834080B1 (fr) 2010-10-27

Family

ID=35717511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05818956A Not-in-force EP1834080B1 (fr) 2004-12-29 2005-12-06 Soupape d'injection de carburant pour des moteurs a combustion interne

Country Status (4)

Country Link
EP (1) EP1834080B1 (fr)
AT (1) ATE486212T1 (fr)
DE (2) DE102004063165A1 (fr)
WO (1) WO2006072521A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011007876A1 (de) * 2011-04-21 2012-10-25 Robert Bosch Gmbh Komponente, insbesondere eines Kraftstoffeinspritzsystems, mit einer Oberfläche
DE102012206913A1 (de) * 2012-04-26 2013-10-31 Robert Bosch Gmbh Vorrichtung zur Einspritzung von Kraftstoff und Verfahren zur Herstellung einer derartigen Vorrichtung
JP6897164B2 (ja) * 2017-03-03 2021-06-30 株式会社Ihi 燃料噴射弁
DE102018217598A1 (de) * 2018-10-15 2020-04-16 Continental Automotive Gmbh Kraftstoffinjektor sowie Verfahren zum Herstellen eines Düsenkörpers für einen Kraftstoffinjektor
JP2021050742A (ja) * 2021-01-04 2021-04-01 株式会社Ihi 燃料噴射弁

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT214617Z2 (it) * 1988-06-23 1990-05-09 Weber Srl Ugello per una valvola di dosatura e di polverizzazione del carburanteper un dispositivo di alimentazione di un motore a combustione interna
DE4200709A1 (de) 1992-01-14 1993-07-15 Bosch Gmbh Robert Kraftstoffeinspritzduese fuer brennkraftmaschinen
CN1144943C (zh) * 1995-03-29 2004-04-07 罗伯特·博施有限公司 尤其用于喷油嘴的孔板
DE19951014A1 (de) * 1999-07-02 2001-01-04 Bosch Gmbh Robert Brennstoffeinspritzventil
US6848635B2 (en) * 2002-01-31 2005-02-01 Visteon Global Technologies, Inc. Fuel injector nozzle assembly with induced turbulence
DE10350548A1 (de) * 2003-10-29 2005-06-02 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004020175A1 (de) 2004-04-24 2005-11-17 Robert Bosch Gmbh Kraftstoffeinspritzdüse für Diesel-Brennkraftmaschinen

Also Published As

Publication number Publication date
DE502005010456D1 (de) 2010-12-09
EP1834080A1 (fr) 2007-09-19
DE102004063165A1 (de) 2006-07-13
WO2006072521A1 (fr) 2006-07-13
ATE486212T1 (de) 2010-11-15

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