EP0890735B2 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

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Publication number
EP0890735B2
EP0890735B2 EP98109048.3A EP98109048A EP0890735B2 EP 0890735 B2 EP0890735 B2 EP 0890735B2 EP 98109048 A EP98109048 A EP 98109048A EP 0890735 B2 EP0890735 B2 EP 0890735B2
Authority
EP
European Patent Office
Prior art keywords
valve
combustion chamber
degree
spray holes
rounding
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
EP98109048.3A
Other languages
German (de)
English (en)
Other versions
EP0890735B1 (fr
EP0890735A3 (fr
EP0890735A2 (fr
Inventor
Karl Hofmann
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
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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0890735A2 publication Critical patent/EP0890735A2/fr
Publication of EP0890735A3 publication Critical patent/EP0890735A3/fr
Publication of EP0890735B1 publication Critical patent/EP0890735B1/fr
Application granted granted Critical
Publication of EP0890735B2 publication Critical patent/EP0890735B2/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
    • F02M61/168—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
    • 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
    • F02M61/184—Discharge orifices having non circular sections

Definitions

  • the invention relates to an internal combustion engine having a combustion chamber and a fuel injection valve comprising a displaceable in a valve body against the restoring force of a valve spring valve member having a valve sealing surface which cooperates with a arranged on the valve body valve seat, and having a plurality of valve seat disposed in the valve body spray holes whose Inlet openings are rounded.
  • Such a fuel injection valve for an internal combustion engine is, for example, from the EP 0 370 659 A1 out.
  • the rounding of the inlet openings of the injection holes is made possible that a larger amount of fuel can be injected through the injection holes in the combustion chamber of the internal combustion engine, since a narrowing of the fuel flowing through the injection holes, resulting in a sharp-edged inlet opening does not occur.
  • the shape of the jet sprayed through the spray holes can be changed by the rounded inlet openings.
  • the injection holes on their side facing the valve member have a different degree of rounding than on its side facing away from the valve member.
  • rounding degree is to be understood in each case as the radius of the rounding.
  • a large rounding degree means a rounding with a large radius, a small roundness a rounding with a small radius.
  • the rounding degrees of the inlet opening of the injection hole of the EP 0 370 659 A1 known fuel injection valve are chosen so that the best possible combustion in the combustion chamber can be achieved.
  • an injection valve for internal combustion engines which has a number of injection ports.
  • the injection ports have different rounding radii at the transition to the valve seat.
  • the radius of curvature hereby varies both over the circumference of the individual injection openings and at the angle which the injection openings enclose with the longitudinal axis of the injection valve.
  • the invention is therefore based on the object, an internal combustion engine with a combustion chamber and a fuel injection valve of the generic type such that an easy adjustment of the spray holes on a variety of conditions, in particular to various installation positions in combustion chambers and on a variety of combustion chamber shapes allows so that the combustion process is further improved.
  • the degree of rounding of the inlet openings of the injection holes is adapted to the arrangement of the injection holes in the valve body, to the installation position in a combustion chamber of the internal combustion engine and to the combustion chamber shape of the internal combustion engine.
  • the degree of rounding of the inlet opening of the injection hole which is further removed from a combustion chamber wall in the installed state, a greater degree of rounding than the inlet opening of a less distant from the combustion chamber wall spray hole.
  • injection holes may have the same degree of rounding, but it is also possible that all the injection holes have inlet openings with completely different degrees of rounding. In principle, a wide variety of combinations are conceivable with regard to the degree of rounding of the individual injection holes.
  • the inlet openings of one or more spray holes on their side facing the valve member have a different degree of rounding than on its side facing away from the valve member. It varies the degree of rounding not only from injection hole to injection hole, but also also depending on the position of the inlet openings relative to the valve member at each inlet opening of the individual injection holes.
  • a fuel injection valve for internal combustion engines shown in FIG Fig. 2 , Includes a piston-shaped valve member 41, which is axially displaceably guided in a bore 42 of a valve body 43.
  • the valve member 41 has at its one, the combustion chamber of an internal combustion engine (not shown) facing the end of a conical valve sealing surface 44, with which it cooperates with a conical valve seat 45 at the inwardly projecting closed end of the bore 42.
  • the valve body 43 is clamped with its combustion chamber remote end by means of a clamping nut 46 axially against a valve holding body 47, wherein between the end faces of the valve body 43 and the valve holding body 47 an intermediate disc 48 is clamped with a central opening.
  • valve member 41 At its end facing away from the valve seat 45, the valve member 41 via a pressure piece 49 which projects through the washer 48, of a coil spring 50 designed as a valve spring, which is supported on a stationary stop 51 which is arranged on the valve holding body 47, and on the Valve member 41 exerts a valve seat 45 toward directed force, acted upon by a spring force.
  • spray holes 53, 57 are provided in the wall of the valve body 43, which open into the combustion chamber of the internal combustion engine.
  • the high-pressure fuel supply takes place in a known manner via a formed between the shank of the valve member 41 and the wall of the bore 42 annular channel 54, which expands into a pressure chamber 55 into which a discharging from an injection pump, not shown, discharge line 56.
  • the inlet openings 60 of the injection holes 53, 57 curves 61, 62, 63, 64 with different radii, ie with different degrees of rounding.
  • the inlet opening 60 of the injection hole 57 has, for example, curves 61, 62 with a smaller degree of rounding than the inlet opening 60 of the injection hole 53.
  • the degrees of rounding of the inlet openings of the injection holes differ on their side facing the valve member from the roundness degrees of the inlet openings facing away from the respective valve member Pages.
  • the spray hole 53 shown on the right side 53 whose inlet opening has greater rounding degrees than those of the inlet opening of the injection hole 57 disposed at a position of the combustion chamber of the internal combustion engine, which has a greater distance from the combustion chamber wall than that of the injection port 57th
  • the rounded portions 63, 64 with greater degrees of rounding a stronger bundling of the fuel jet ejected through the injection hole 53 is made possible, which moreover has a greater length than is the case with the fuel jet ejected through the injection hole 57.
  • the formation of the inlet port 60 of the injection ports 53, 57 is selected depending on the installation position in the combustion chamber and the combustion chamber shape. It proves to be particularly advantageous that the curves 61, 62, 63, 64 in a particularly simple manner, for example by so-called HE rounding, i. hydroerosives rounds are produced.
  • HE rounding i. hydroerosives rounds are produced.
  • a fluid containing abrasive particles is forced with pressure through previously made holes in the valve body 43, whereby the edges of the inlet ports are rounded by grinding.
  • spray holes can be drilled and rounded and only then the remaining spray holes drilled and rounded.
  • the first drilled and rounded spray holes are then rounded more rounded in a further HE rounding process than the last drilled injection holes.
  • an optimum quantity distribution of the injected fuel can be adapted to the combustion chamber shape and to the installation position, wherein the beam shape can be selected practically freely by varying the degrees of rounding.

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 (1)

  1. Moteur à combustion interne avec une chambre de combustion et un injecteur de carburant qui comprend un corps de soupape (43) dans lequel est disposé, contre la force de rappel d'un ressort de soupape (50), un organe de soupape mobile (41) qui, par une surface d'étanchéité de soupape (44), coopère avec un siège de soupape (45) disposé sur le corps de soupape, avec en dessous du siège de soupape (45) dans le corps de soupape (43) plusieurs trous d'injection dont les ouvertures d'entrée (60) sont arrondies, une partie des trous d'injection (53) présentant au moins un degré d'arrondi différent du reste des trous d'injection (57), les ouvertures d'entrée (60) des trous d'injection individuels (53, 57) de l'injecteur de carburant présentant, sur leur face en regard de l'organe de soupape (41), un degré d'arrondi différent de celui sur leur face opposée à l'organe de soupape (41),
    caractérisé en ce que
    le degré d'arrondi des trous d'injection (53, 57) est adapté à la disposition des trous d'injection (53, 57) dans le corps de soupape (43), à la position de montage dans une chambre de combustion du moteur à combustion interne et à la forme de la chambre de combustion du moteur à combustion interne de telle sorte que le degré d'arrondi de l'ouverture d'entrée (60) du trou d'injection (53) qui, dans la direction du jet de carburant injecté, est plus éloigné d'une paroi de la chambre de combustion dans l'état monté, présente un degré d'arrondi supérieur à l'ouverture d'entrée (60) d'un trou d'injection (57) moins éloigné de la paroi de la chambre de combustion.
EP98109048.3A 1997-07-11 1998-05-19 Soupape d'injection de combustible Expired - Lifetime EP0890735B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19729827 1997-07-11
DE19729827A DE19729827A1 (de) 1997-07-11 1997-07-11 Kraftstoffeinspritzventil

Publications (4)

Publication Number Publication Date
EP0890735A2 EP0890735A2 (fr) 1999-01-13
EP0890735A3 EP0890735A3 (fr) 2001-10-10
EP0890735B1 EP0890735B1 (fr) 2006-10-18
EP0890735B2 true EP0890735B2 (fr) 2014-09-10

Family

ID=7835445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98109048.3A Expired - Lifetime EP0890735B2 (fr) 1997-07-11 1998-05-19 Soupape d'injection de combustible

Country Status (4)

Country Link
US (1) US5992766A (fr)
EP (1) EP0890735B2 (fr)
JP (1) JP4154033B2 (fr)
DE (2) DE19729827A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19914719C2 (de) * 1999-03-31 2001-05-03 Siemens Ag Vorrichtung zum hydroerosiven Runden von Einlaufkanten der Spritzlochkanäle in einem Düsenkörper
DE19931890A1 (de) * 1999-07-08 2001-01-18 Siemens Ag Düsenkörper für eine Kraftstoffeinspritzdüse mit optimierter Spritzlochkanalgeometrie
JP4189714B2 (ja) * 2000-08-03 2008-12-03 株式会社デンソー 燃料噴射装置
DE10156020A1 (de) * 2001-11-15 2003-07-17 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10219608A1 (de) * 2002-05-02 2003-11-20 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10330256A1 (de) † 2003-07-04 2005-01-20 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102004062008A1 (de) * 2004-12-23 2006-07-13 Robert Bosch Gmbh Kraftstofffilter mit Auslassöffnungen, die vorzugsweise mit einem hydroerosiven Verfahren bearbeitet sind
US7572997B2 (en) * 2007-02-28 2009-08-11 Caterpillar Inc. EDM process for manufacturing reverse tapered holes
EP2333307A4 (fr) * 2008-09-24 2013-03-13 Toyota Motor Co Ltd Soupape d'injection de carburant pour moteur à combustion interne et son procédé de fabrication
WO2019030078A1 (fr) * 2017-08-08 2019-02-14 Robert Bosch Gmbh Buse d'injecteur de carburant
DE102019202073A1 (de) 2019-02-15 2020-08-20 Robert Bosch Gmbh Verfahren zum Herstellen einer Einspritzdüse zum Einspritzen von Kraftstoff in einen Brennraum einer Brennkraftmaschine und Düsenanordnung mit einer Einspritzdüse

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58106167A (ja) † 1981-12-21 1983-06-24 Hino Motors Ltd 内燃機関の燃料噴射ノズル

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
DE2557772A1 (de) * 1975-12-20 1977-06-23 Kloeckner Humboldt Deutz Ag Brennstoffeinspritzventil
JPS6049262U (ja) * 1983-09-14 1985-04-06 日産自動車株式会社 デイ−ゼル機関用燃料噴射弁
US4578164A (en) * 1983-08-24 1986-03-25 Nissan Motor Co., Ltd. Method of electrolytically finishing spray-hole of fuel injection nozzle
JPH0267459A (ja) * 1988-08-31 1990-03-07 Nippon Denso Co Ltd 燃料噴射ノズル
GB8827107D0 (en) * 1988-11-19 1988-12-21 Lucas Ind Plc Fuel injection nozzle
JPH0494452A (ja) * 1990-08-08 1992-03-26 Nissan Motor Co Ltd 燃料噴射ノズル
JPH0583367U (ja) * 1992-04-20 1993-11-12 日産ディーゼル工業株式会社 直噴式ディーゼルエンジンの燃料噴射ノズル
DE19507188C1 (de) * 1995-03-02 1996-08-14 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
EP0809017A1 (fr) * 1996-05-22 1997-11-26 Steyr-Daimler-Puch Aktiengesellschaft Injecteur de carburant à deux étages pour moteurs à combustion interne

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58106167A (ja) † 1981-12-21 1983-06-24 Hino Motors Ltd 内燃機関の燃料噴射ノズル

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LONG ZHANG, TADASHI TSURUSHIMA, TAKAHIRO UEDA,: "Measurement of Liquid Phase Penetration of Evaporating", SAE 971645, 31 December 1997 (1997-12-31) - 31 December 1997 (1997-12-31), pages 87 - 93 †
S. KAMPMANN, B. DITTUS, P. MATTES, M. KIRNER: "The Influence of Hydro Grinding at VCO Nozzles on the Mixture Preparation in a DI Diesel Engine", SAE 960867, 26 February 1996 (1996-02-26) - 29 February 1996 (1996-02-29) †

Also Published As

Publication number Publication date
US5992766A (en) 1999-11-30
EP0890735B1 (fr) 2006-10-18
EP0890735A3 (fr) 2001-10-10
EP0890735A2 (fr) 1999-01-13
JPH1193806A (ja) 1999-04-06
DE19729827A1 (de) 1999-01-14
JP4154033B2 (ja) 2008-09-24
DE59813768D1 (de) 2006-11-30

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