EP1045982B1 - Gicleur de carburant pour moteurs a combustion interne a auto-allumage - Google Patents

Gicleur de carburant pour moteurs a combustion interne a auto-allumage Download PDF

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Publication number
EP1045982B1
EP1045982B1 EP99947222A EP99947222A EP1045982B1 EP 1045982 B1 EP1045982 B1 EP 1045982B1 EP 99947222 A EP99947222 A EP 99947222A EP 99947222 A EP99947222 A EP 99947222A EP 1045982 B1 EP1045982 B1 EP 1045982B1
Authority
EP
European Patent Office
Prior art keywords
internal combustion
fuel
fuel injection
valve seat
spray hole
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
EP99947222A
Other languages
German (de)
English (en)
Other versions
EP1045982A1 (fr
Inventor
Axel Hockenberger
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 EP1045982A1 publication Critical patent/EP1045982A1/fr
Application granted granted Critical
Publication of EP1045982B1 publication Critical patent/EP1045982B1/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
    • F02M61/1806—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
    • F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
    • 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
    • F02M61/18—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
    • F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent

Definitions

  • the invention relates to a fuel injector for Self-igniting internal combustion engines of the genus Claim 1.
  • Such fuel injectors are, for example from DE 43 03 813 C1 and from the book publication: Bosch automotive paperback 22nd edition, 1995, pages 526 ff.
  • a fuel injection nozzle is known from document EP 809017 A1, the spray holes, which has a constricting area and have a widening area, these two Areas are connected by a cylindrical section. spiracles in this form, however, have the disadvantage that the implementation the fuel pressure at a speed not optimal he follows.
  • a fuel injection valve is from document DE-OS 2557772 known to have injection ports through which Fuel is injected into the combustion chamber of the internal combustion engine becomes.
  • the injection openings narrow from the inlet cross section to a narrowest cross section and then expand again in essentially conical up to the outlet cross section.
  • the narrowest cross section is, however, arranged near the inlet opening, so that here too the disadvantage occurs that the fuel pressure is not optimal can be converted into a speed and thus an optimal one Atomization is not guaranteed.
  • the object of the invention is to develop a fuel injection nozzle of the type described in the introduction in such a way that its efficiency in converting the fuel pressure into a speed of the fuel jet fed in and thereby the efficiency of the distribution of the fuel in the engine are increased.
  • the fuel injection nozzle is also intended to reduce NO x and particle values.
  • the spray hole cross section to the combustion chamber becomes particularly simple Way an optimal conversion of the pressure into a speed of the fuel jet and thus a high one Efficiency in the distribution of the fuel in the Internal combustion engine reached. While in the convergent Fuel injector area higher speeds will be generated in their divergent Part of creating a spray with small particles allows. This will be advantageous a shift in the range of maximum distribution away from the fuel injector due to higher Fuel jet speeds at fuel injector known from the prior art occurs through the divergent part of the Counteracted fuel injector. By an optimal Conversion of the pressure of the fuel jet into its speed also becomes the tendency to cavitation reduced.
  • the smallest spray hole cross section extends in an advantageous manner in axially central area of the spray hole opening, so that the divergent and the convergent spray hole area have approximately the same axial extent.
  • the Spray holes advantageously have one of the following Cross-sectional shapes on: a circular shape, one elliptical shape, a slit-like shape.
  • a nozzle body 10 has a bore 12, the Reason in a crest 13 at the injection end conical valve seat surface 14 is formed.
  • valve seat surface 14 from which the tip 13 penetrating spray holes 20 opening into the combustion chamber a correspondingly shaped closing cone acts 31 together at the tip of a valve needle 30.
  • the of a (not shown) closing spring loaded valve needle 30 has one in the input area of the Nozzle body 10 slidably guided guide section as well as a pressure shoulder in the Diameter stepped section, at its free Walls of the closing cone 31 are formed.
  • the next section the nozzle needle 30 has a smaller thickness than the width of the surrounding bore 12 so that it is a Annular gap surrounds the height in a manner known per se the pressure shoulder to one with a feed hole connected chamber (not shown) expanded is.
  • the spray hole 20 has one towards the combustion chamber of the internal combustion engine after the initial narrowing expanding cross-section.
  • a convergent part 21 is followed by a divergent part 22.
  • the spray hole 20 in this respect has the shape of a "Laval nozzle".
  • a Laval nozzle in the convergent area 21 the fuel injector at higher speeds of the fuel jet to be injected, whereas in the divergent part of the nozzle the generation of a Sprays with small particles are created.
  • An unwanted one Shift the range of the maximum distribution away from the nozzle due to the higher speed the fuel injection part is thus by means of the divergent Part 22 of the fuel injector counteracted.
  • the resulting "gentler" implementation the pressure of the fuel injection jet into its Speed reduces the tendency to cavitate Fuel injector.
  • Such a fuel injector can be very advantageously produced by spark erosion, the variation in the cross-sectional shape of the Spray hole 20 in a simple manner by varying the Parameters voltage, current and feed rate can be manufactured.
  • the cost of production such a spray hole 20 can be smaller be than conical known from the prior art Spray holes where the inlet cross section is larger than the outlet cross section. Because the entry openings in known from the prior art In many cases, additional fuel injectors hydroerosively rounded, the cost of manufacturing one with spray holes 20 described above equipped fuel injector even reduced as the time to round the entry openings reduced or the process can be omitted.

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

Claims (2)

  1. Gicleur de carburant pour moteurs à combustion interne à autoallumage, comportant un corps de buse (10) dans lequel une surface de siège de soupape (14), à partir de laquelle partent des trous d'injection (20) sous la forme de tuyères de Laval, est formée sur l'extrémité d'un alésage (12) côté injection, et une aiguille d'injecteur (30) s'ouvrant contre une force de serrage dans le sens opposé à l'écoulement du carburant, guidée de manière mobile dans la zone d'entrée de l'alésage (12) tournée dans la direction opposée à l'extrémité côté injection et présentant un cône de fermeture (31) sur son côté tourné vers la surface du siège de soupape (14), lequel cône coopère avec la surface de siège de soupape (14), la section transversale du trou d'injection s'élargissant à nouveau vers la chambre de combustion du moteur à combustion interne après s'être rétrécie au début,
    caractérisé en ce que
    la plus petite zone du trou d'injection (20) en coupe transversale est disposée au milieu de l'extension axiale du trou d'injection.
  2. Gicleur de carburant selon la revendication 1,
    caractérisé en ce que
    la forme de la coupe transversale des trous d'injection (20) présente l'une des formes suivantes : forme ronde, forme elliptique, forme fendue.
EP99947222A 1998-10-15 1999-07-16 Gicleur de carburant pour moteurs a combustion interne a auto-allumage Expired - Lifetime EP1045982B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19847460A DE19847460A1 (de) 1998-10-15 1998-10-15 Kraftstoffeinspritzdüse für selbstzündende Brennkraftmaschinen
DE19847460 1998-10-15
PCT/DE1999/002204 WO2000023707A1 (fr) 1998-10-15 1999-07-16 Gicleur de carburant pour moteurs a combustion interne a auto-allumage

Publications (2)

Publication Number Publication Date
EP1045982A1 EP1045982A1 (fr) 2000-10-25
EP1045982B1 true EP1045982B1 (fr) 2004-03-24

Family

ID=7884510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99947222A Expired - Lifetime EP1045982B1 (fr) 1998-10-15 1999-07-16 Gicleur de carburant pour moteurs a combustion interne a auto-allumage

Country Status (6)

Country Link
EP (1) EP1045982B1 (fr)
JP (1) JP2002527678A (fr)
KR (1) KR100627745B1 (fr)
BR (1) BR9917602A (fr)
DE (2) DE19847460A1 (fr)
WO (1) WO2000023707A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10105674A1 (de) * 2001-02-08 2002-08-29 Siemens Ag Kraftstoffeinspritzdüse für eine Brennkraftmaschine
JP3879909B2 (ja) * 2001-03-29 2007-02-14 株式会社デンソー 燃料噴射装置
DE10124745A1 (de) * 2001-05-21 2003-03-27 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10360773A1 (de) * 2003-12-23 2005-07-28 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004049280A1 (de) * 2004-10-09 2006-04-13 Robert Bosch Gmbh Brennstoffeinspritzventil
KR100742202B1 (ko) * 2005-10-13 2007-07-24 진명이십일 (주) 인젝터의 분사노즐 구조
DE102006013962A1 (de) * 2006-03-27 2007-10-04 Robert Bosch Gmbh Einspritzdüse mit Spritzkanälen sowie Verfahren zur Einbringung von Kanälen
GB0712403D0 (en) 2007-06-26 2007-08-01 Delphi Tech Inc A Spray Hole Profile
DE102008051365B4 (de) 2008-10-15 2010-07-01 L'orange Gmbh Kraftstoff-Einspritzventil für Brennkraftmaschinen
JP5299293B2 (ja) * 2010-01-19 2013-09-25 株式会社デンソー 燃料噴射弁およびその製造方法
AT511880B1 (de) * 2011-09-06 2013-12-15 Bosch Gmbh Robert Verschleissoptimierte herstellung von konischen spritzlöchern
EP2884090B1 (fr) 2013-12-11 2018-02-21 Continental Automotive GmbH Corps de buse et soupape d'injection de carburant
JP6247167B2 (ja) * 2014-06-24 2017-12-13 トヨタ自動車株式会社 燃料噴射弁の加工方法
JP2017106418A (ja) * 2015-12-11 2017-06-15 株式会社デンソー 燃料噴射弁及びその製造方法
CN110805513B (zh) * 2018-08-05 2021-06-01 大连理工大学 一种带扭转式椭圆形喷孔的喷嘴

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE631135C (de) * 1934-08-19 1936-06-12 Wanderer Werke Vorm Winklhofer Verfahren zur Herstellung von aus mehreren Teilen zusammengesetzten Dueseneinsaetzen
DE2557772A1 (de) * 1975-12-20 1977-06-23 Kloeckner Humboldt Deutz Ag Brennstoffeinspritzventil
JPH05231273A (ja) * 1992-02-19 1993-09-07 Hino Motors Ltd 燃料噴射ノズル及びその製造方法
EP0809017A1 (fr) * 1996-05-22 1997-11-26 Steyr-Daimler-Puch Aktiengesellschaft Injecteur de carburant à deux étages pour moteurs à combustion interne

Also Published As

Publication number Publication date
DE19847460A1 (de) 2000-04-20
KR20010033112A (ko) 2001-04-25
JP2002527678A (ja) 2002-08-27
DE59908951D1 (de) 2004-04-29
KR100627745B1 (ko) 2006-09-26
EP1045982A1 (fr) 2000-10-25
WO2000023707A1 (fr) 2000-04-27
BR9917602A (pt) 2002-10-01

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