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WO2000023707A1 - Fuel injection nozzle for internal combustion engines with self-ignition - Google Patents

Fuel injection nozzle for internal combustion engines with self-ignition Download PDF

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Publication number
WO2000023707A1
WO2000023707A1 PCT/DE1999/002204 DE9902204W WO0023707A1 WO 2000023707 A1 WO2000023707 A1 WO 2000023707A1 DE 9902204 W DE9902204 W DE 9902204W WO 0023707 A1 WO0023707 A1 WO 0023707A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel injection
seat surface
valve seat
injection nozzle
internal combustion
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.)
Ceased
Application number
PCT/DE1999/002204
Other languages
German (de)
French (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
Priority to BR9917602-5A priority Critical patent/BR9917602A/en
Priority to EP99947222A priority patent/EP1045982B1/en
Priority to JP2000577405A priority patent/JP2002527678A/en
Priority to KR1020007006475A priority patent/KR100627745B1/en
Priority to DE59908951T priority patent/DE59908951D1/en
Publication of WO2000023707A1 publication Critical patent/WO2000023707A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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 Kraf material injection nozzle for self-igniting internal combustion engines according to the preamble of claim 1.
  • Such fuel injection nozzles are known, for example, from DE 43 03 813 Cl and from the book publication: Bosch Automotive Pocket Book 22nd Edition, 1995, pages 526 ff.
  • the spray holes are cylindrical.
  • the conversion of the fuel pressure into a speed of the injected fuel jet takes place within a small range, which results in high efficiency losses.
  • 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 of the internal combustion engine widens again after an initial narrowing, an optimal conversion of the pressure into a speed of the fuel jet and thus a high efficiency in the distribution of the fuel in the internal combustion engine is achieved in a particularly simple manner. Namely, while higher speeds are generated in the convergent area of the fuel injection nozzle, the generation of a spray with small particles is made possible in its divergent part. This advantageously shifts the range of the maximum distribution away from the fuel injector due to higher speeds of the fuel jet, which occurs in the fuel injector known from the prior art, by the divergent part of the Counteracted fuel injector. By optimally converting the pressure of the fuel jet into its speed, this also reduces the tendency to cavitation.
  • the smallest spray hole cross-section advantageously extends in the axially central region of the spray hole opening, so that the divergent and the convergent spray hole region have approximately the same axial extent.
  • such a fuel injection nozzle can be produced particularly cost-effectively, for example by spark erosion.
  • the spray holes advantageously have one of the following cross-sectional shapes: a circular shape, an elliptical shape, a slit-like shape.
  • FIG. 1 shows a longitudinal sectional view of the lower region of a fuel injection valve according to the invention and FIG. 2 shows an enlarged detail, designated II in FIG. 1, of the fuel injection nozzle shown in FIG. 1.
  • a nozzle body 10 has a bore 12, the base of which is formed in a dome 13 at the end on the injection side as a conical valve seat surface 14.
  • a correspondingly shaped closing cone 31 at the tip of a valve needle 30 interacts with this valve seat surface 14, from which the spray holes 20 penetrate the tip 13 and open into the combustion chamber.
  • the valve needle 30, which is loaded by a closing spring (not shown), has a guide section which is displaceably guided in the inlet-side region of the nozzle body 10 and a subsequent section which is offset in diameter via a pressure shoulder and on the free walls of which the closing cone 31 is formed.
  • the following section of the nozzle needle 30 has a smaller thickness than the width of the surrounding bore 12, so that it is surrounded by an annular gap which is expanded in a manner known per se at the pressure shoulder to form a chamber (not shown) connected to a feed bore.
  • the spray hole 20 has a cross section widening towards the combustion chamber of the internal combustion engine after the initial narrowing.
  • a convergent part 21 follows a divergent part 22.
  • the spray hole 20 has the shape of a "Laval nozzle".
  • Laval nozzle As with a Laval nozzle, higher speeds of the fuel jet to be injected are generated in the convergent region 21 of the fuel injection nozzle, whereas in the divergent part of the nozzle a spray with small particles is produced.
  • An undesirable shift of the range of the maximum distribution away from the nozzle due to the higher speed of the fuel injection part is thus counteracted by means of the divergent part 22 of the fuel injection nozzle.
  • the resulting "gentler" conversion of the pressure of the fuel injection jet into its speed reduces the tendency of the fuel injection nozzle to cavitate.
  • Such a fuel injector can be produced in a very advantageous manner by spark erosion, wherein the variation in the cross-sectional shape of the spray hole 20 can be produced in a simple manner by varying the parameters voltage, current intensity and feed rate.
  • the cost of producing such a spray hole 20 can be lower than in the case of conical spray holes known from the prior art, in which the inlet cross section is larger than the outlet cross section. Since the inlet openings in fuel injection nozzles known from the prior art are in many cases additionally rounded off hydroerosively, the costs for producing a fuel injection nozzle equipped with spray holes 20 described above can even be reduced because the time to round the entry openings can be 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)

Abstract

The invention relates to a fuel injection nozzle for internal combustion engines with self-ignition, comprising a nozzle body (10). A conical valve seat surface (14) is formed at the injection end of a borehole (12), nozzle holes (20) extending from this valve seat surface. The inventive nozzle also comprises a valve needle (30) which opens in the opposite direction to the flow of fuel, against a closing force, and which is displaceably guided in the entry area of the borehole (12) facing away from the injection end. The valve needle has a closing cone (31) at its end facing towards the valve seat surface (14), said closing cone interacting with the valve seat surface (14). The invention is characterised in that the nozzle hole cross-section becomes wider again towards the combustion chamber of the internal combustion engine after an initial narrowing.

Description

Kraftstoffeinspritzdüse für selbstzündende BrennkraftmaschinenFuel injection nozzle for self-igniting internal combustion engines

Stand der TechnikState of the art

Die Erfindung betrifft eine Kraf stoffeinspritzdüse für selbstzündende Brennkraftmaschinen nach der Gattung des Anspruchs 1.The invention relates to a Kraf material injection nozzle for self-igniting internal combustion engines according to the preamble of claim 1.

Derartige Kraftstoffeinspritzdusen sind beispielsweise aus der DE 43 03 813 Cl sowie aus der Buchveröffentlichung: Bosch Kraftfahrtechnisches Taschenbuch 22. Auflage, 1995, Seiten 526 ff bekannt.Such fuel injection nozzles are known, for example, from DE 43 03 813 Cl and from the book publication: Bosch Automotive Pocket Book 22nd Edition, 1995, pages 526 ff.

Bei derartigen Kraftstoffeinspritzdüsen sind die Spritzlöcher zylindrisch ausgebildet. Die Umsetzung des Kraftstoffdrucks in eine Geschwindigkeit des eingespritzten Kraftstoffstrahls geschieht dabei innerhalb eines kleinen Bereiches, wodurch hohe Wirkungsgradverluste entstehen. Aufgabe der Erfindung ist es, eine Kraftstoffeinspritz- düse der eingangs beschriebenen Art derart weiterzubilden, daß ihr Wirkungsgrad bei der Umsetzung des Kraft - stoffdrucks in eine Geschwindigkeit des eingespeisten KraftstoffStrahls und dadurch der Wirkungsgrad der Verteilung des Kraftstoffs im Motor erhöht werden. Durch die Kraftstoffeinspritzdüse sollen auch NOx und Partikelwerte reduziert werden.In such fuel injection nozzles, the spray holes are cylindrical. The conversion of the fuel pressure into a speed of the injected fuel jet takes place within a small range, which results in high efficiency losses. 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.

Vorteile der ErfindungAdvantages of the invention

Diese Aufgabe wird bei einer Kraftstoffeinspritzdüse für selbstzündenderennkraftmaschinen der gattungsgemäßen Art mit den Merkmalen des Anspruchs 1 gelöst .This object is achieved in a fuel injection nozzle for auto-ignition internal combustion engines of the generic type with the features of claim 1.

Dadurch, daß sich der Spritzlochquerschnitt zum Brennraum der Brennkraftmaschine nach einer anfänglichen Verengung wieder erweitert, wird auf besonders einfache Weise eine optimale Umsetzung des Drucks in eine Geschwindigkeit des KraftstoffStrahls und damit ein hoher Wirkungsgrad bei der Verteilung des Kraftstoffs in der Brennkraftmaschine erreicht. Während nämlich im konvergenten Bereich der Kraftstoffeinspritzdüse höhere Geschwindigkeiten erzeugt werden, wird in ihrem divergenten Teil die Erzeugung eines Sprays mit kleinen Partikeln ermöglicht. Hierdurch wird auf vorteilhafte Weise einer Verschiebung des Bereichs der maximalen Verteilung weg von der Kraftstoffeinspritzdüse aufgrund höherer Geschwindigkeiten des KraftstoffStrahls , die bei aus dem Stand der Technik bekannten Kraftstoffeinspritzdüse auftritt, durch den divergenten Teil der Kraftstoffeinspritzdüse entgegengewirkt. Durch eine optimale Umsetzung des Drucks des KraftstoffStrahls in seine Geschwindigkeit wird hierdurch auch die Kavitationsneigung vermindert. Der kleinste Spritzlochquerschnitt erstreckt sich dabei in vorteilhafter Weise im axial mittigen Bereich der Spritzlochöffnung, so daß der divergente und der konvergente Spritzlochbereich etwa die gleiche axiale Erstreckung aufweisen.Due to the fact that the spray hole cross section to the combustion chamber of the internal combustion engine widens again after an initial narrowing, an optimal conversion of the pressure into a speed of the fuel jet and thus a high efficiency in the distribution of the fuel in the internal combustion engine is achieved in a particularly simple manner. Namely, while higher speeds are generated in the convergent area of the fuel injection nozzle, the generation of a spray with small particles is made possible in its divergent part. This advantageously shifts the range of the maximum distribution away from the fuel injector due to higher speeds of the fuel jet, which occurs in the fuel injector known from the prior art, by the divergent part of the Counteracted fuel injector. By optimally converting the pressure of the fuel jet into its speed, this also reduces the tendency to cavitation. The smallest spray hole cross-section advantageously extends in the axially central region of the spray hole opening, so that the divergent and the convergent spray hole region have approximately the same axial extent.

Darüber hinaus ist eine solche Kraftstoffeinspritzdüse beispielsweise durch Funkenerosion besonders kostengünstig herzustellen.In addition, such a fuel injection nozzle can be produced particularly cost-effectively, for example by spark erosion.

Was die Ausbildung der Spritzlöcher betrifft, so sind die unterschiedlichsten Ausführungsformen denkbar. Die Spritzlöcher weisen vorteilhafterweise eine der folgenden Querschnittsformen auf: eine kreisrunde Form, eine elliptische Form, eine schlitzartige Form.With regard to the formation of the spray holes, the most varied of embodiments are conceivable. The spray holes advantageously have one of the following cross-sectional shapes: a circular shape, an elliptical shape, a slit-like shape.

Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstands der Erfindung sind der Zeichnung, der Beschreibung und den Ansprüchen entnehmbar .Further advantages and advantageous configurations of the object of the invention can be found in the drawing, the description and the claims.

Zeichnungdrawing

In der Zeichnung zeigen:The drawing shows:

Fig. 1 eine Längsschnittdarstellung des unteren Bereichs eines erfindungsgemäßen Kraftstoffein- spritzventils und Fig. 2 eine in Fig. 1 mit II bezeichnete Detailvergrößerung der in Fig. 1 dargestellten Kraftstoffeinspritzdüse .1 shows a longitudinal sectional view of the lower region of a fuel injection valve according to the invention and FIG. 2 shows an enlarged detail, designated II in FIG. 1, of the fuel injection nozzle shown in FIG. 1.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Ein Düsenkörper 10 weist eine Bohrung 12 auf, deren Grund in einer Kuppe 13 am einspritzsseitigen Ende als konische Ventilsitzfläche 14 ausgebildet ist.A nozzle body 10 has a bore 12, the base of which is formed in a dome 13 at the end on the injection side as a conical valve seat surface 14.

Mit dieser Ventilsitzfläche 14, von der die Kuppe 13 durchsetzende und im Brennraum mündende Spritzlöcher 20 ausgehen, wirkt ein entsprechend geformter Schließkegel 31 an der Spitze einer Ventilnadel 30 zusammen. Die von einer (nicht dargestellten) Schließfeder belastete Ventilnadel 30 hat einen im eingangsseitigen Bereich des Düsenkörpers 10 verschiebbar geführten Führungsabschnitt sowie einen daran über eine Druckschulter im Durchmesser abgesetzten Folgeabschnitt, an dessen freie Wände der Schließkegel 31 angeformt ist. Der Folgeabschnitt der Düsennadel 30 hat eine geringere Dicke als die Weite der umgebenden Bohrung 12, so daß ihn ein Ringspalt umgibt, der auf an sich bekannte Weise in Höhe der Druckschulter zu einer mit einer Zuführbohrung verbundenen (nicht dargestellten) Kammer erweitert ist .A correspondingly shaped closing cone 31 at the tip of a valve needle 30 interacts with this valve seat surface 14, from which the spray holes 20 penetrate the tip 13 and open into the combustion chamber. The valve needle 30, which is loaded by a closing spring (not shown), has a guide section which is displaceably guided in the inlet-side region of the nozzle body 10 and a subsequent section which is offset in diameter via a pressure shoulder and on the free walls of which the closing cone 31 is formed. The following section of the nozzle needle 30 has a smaller thickness than the width of the surrounding bore 12, so that it is surrounded by an annular gap which is expanded in a manner known per se at the pressure shoulder to form a chamber (not shown) connected to a feed bore.

Wie aus Fig. 1 und insbesondere aus Fig. 2 hervorgeht, weist das Spritzloch 20 einen zum Brennraum der Brennkraftmaschine sich nach anfänglicher Verengung wieder erweiternden Querschnitt auf. Einem konvergenten Teil 21 folgt ein divergenter Teil 22. Das Spritzloch 20 weist insofern die Form einer "Laval-Düse" auf. Wie bei einer Laval-Düse werden in dem konvergenten Bereich 21 der Kraftstoffeinspritzdüse höhere Geschwindigkeiten des einzuspritzenden KraftstoffStrahls erzeugt, wohingegen im divergenten Teil der Düse die Erzeugung eines Sprays mit kleinen Partikeln entsteht. Eine unerwünschte Verschiebung des Bereichs der maximalen Verteilung weg von der Düse aufgrund der höheren Geschwindigkeit des Kraftstoffeinspritzteils wird somit mittels des divergenten Teils 22 der Kraftstoffeinspritzdüse entgegengewirkt. Die hierdurch entstehende "sanftere" Umsetzung des Drucks des Kraftstoffeinspritzstrahls in seine Geschwindigkeit reduziert die Kavitationsneigung der Kraftstoffeinspritzdüse .As can be seen from FIG. 1 and in particular from FIG. 2, the spray hole 20 has a cross section widening towards the combustion chamber of the internal combustion engine after the initial narrowing. A convergent part 21 follows a divergent part 22. The spray hole 20 has the shape of a "Laval nozzle". As with a Laval nozzle, higher speeds of the fuel jet to be injected are generated in the convergent region 21 of the fuel injection nozzle, whereas in the divergent part of the nozzle a spray with small particles is produced. An undesirable shift of the range of the maximum distribution away from the nozzle due to the higher speed of the fuel injection part is thus counteracted by means of the divergent part 22 of the fuel injection nozzle. The resulting "gentler" conversion of the pressure of the fuel injection jet into its speed reduces the tendency of the fuel injection nozzle to cavitate.

Eine derartige Kraftstoffeinspritzdüse kann auf sehr vorteilhafte Weise durch Funkenerosion hergestellt werden, wobei die Variation der Querschnittsform des Spritzlochs 20 auf einfache Weise durch Variation der Parameter Spannung, Stromstärke und Vorschubgeschwindigkeit hergestellt werden kann. Die Kosten zur Erzeugung eines derartigen Spritzlochs 20 können geringer sein als bei aus dem Stand der Technik bekannten konischen Spritzlöchern, bei denen der Eintrittsquerschnitt größer ist als der Austrittsquerschnitt. Da die Eintrittsöffnungen bei aus dem Stand der Technik bekannten Kraftstoffeinspritzdüsen in vielen Fällen zusätzlich hydroerosiv gerundet werden, können die Kosten zur Herstellung einer mit oben beschriebenen Spritzlöchern 20 ausgestatteten Kraftstoffeinspritzdüse sogar reduziert werden, da die Zeit zum Runden der Eintrittsδffnungen reduziert bzw. der Vorgang weggelassen werden kann. Such a fuel injector can be produced in a very advantageous manner by spark erosion, wherein the variation in the cross-sectional shape of the spray hole 20 can be produced in a simple manner by varying the parameters voltage, current intensity and feed rate. The cost of producing such a spray hole 20 can be lower than in the case of conical spray holes known from the prior art, in which the inlet cross section is larger than the outlet cross section. Since the inlet openings in fuel injection nozzles known from the prior art are in many cases additionally rounded off hydroerosively, the costs for producing a fuel injection nozzle equipped with spray holes 20 described above can even be reduced because the time to round the entry openings can be reduced or the process can be omitted.

Claims

Patentansprüche claims Kraftstoffeinspritzdüse für selbstzündende Brennkraftmaschinen mit einem Düsenkörper (10) , bei dem am einspritzseitigen Ende einer Bohrung (12) eine konische Ventilsitzfläche (14) gebildet ist, von der Spritzlöcher (20) ausgehen, und mit einer gegen eine Schließkraft entgegen der KraftstoffStrömungsrichtung öffnenden Ventilnadel (30) , die in dem einspritzseitigen Ende abgewandten Eingangsbereich der Bohrung (12) verschiebbar geführt ist und an ihrem der Ventilsitzfläche (14) zugewandten Seite einen Schließkegel (31) aufweist, der mit der Ventilsitzfläche (14) zusammenwirkt, dadurch gekennzeichnet, daß sich der Spritzlochquerschnitt zum Brennraum der Brennkaftmaschine hin nach anfänglicher Verengung wieder erweitert.Fuel injection nozzle for self-igniting internal combustion engines with a nozzle body (10), in which a conical valve seat surface (14) is formed at the injection-side end of a bore (12), from which spray holes (20) extend, and with a valve needle (which opens against a closing force against the direction of fuel flow) 30), which is displaceably guided in the input region of the bore (12) facing away from the injection end and on its side facing the valve seat surface (14) has a closing cone (31) which interacts with the valve seat surface (14), characterized in that the The cross-section of the spray hole towards the combustion chamber of the cigarette machine was expanded again after the initial narrowing. Kraftstoffeinspritzdüse nach Anspruch 1, dadurch gekennzeichnet, daß die Querschnittsform der Spritzlöcher (20) eine der folgenden Formen auf- weist: kreisrunde Form, elliptische Form, schlitzartige Form.Fuel injection nozzle according to claim 1, characterized in that the cross-sectional shape of the spray holes (20) has one of the following shapes. shows: circular shape, elliptical shape, slit-like shape. 3. Kraftstoffeinspritzdüse nach Anspruch 1, dadurch gekennzeichnet, daß ein im Querschnitt kleinster Spritzlochbereich vorzugsweise in der Mitte der axialen Spritzlocherstreckung angeordnet ist. 3. Fuel injection nozzle according to claim 1, characterized in that a cross-sectionally smallest spray hole area is preferably arranged in the middle of the axial spray hole extension.
PCT/DE1999/002204 1998-10-15 1999-07-16 Fuel injection nozzle for internal combustion engines with self-ignition Ceased WO2000023707A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BR9917602-5A BR9917602A (en) 1998-10-15 1999-07-16 Fuel injector nozzle for self-ignition combustion engines
EP99947222A EP1045982B1 (en) 1998-10-15 1999-07-16 Fuel injection nozzle for internal combustion engines with self-ignition
JP2000577405A JP2002527678A (en) 1998-10-15 1999-07-16 Fuel injection nozzles for self-igniting internal combustion engines
KR1020007006475A KR100627745B1 (en) 1998-10-15 1999-07-16 Fuel Injection Nozzles for Self-ignition Engines
DE59908951T DE59908951D1 (en) 1998-10-15 1999-07-16 FUEL INJECTION NOZZLE FOR AUTO IGNITION ENGINES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19847460A DE19847460A1 (en) 1998-10-15 1998-10-15 Fuel injection valve nozzle with orifice at first converges then diverges to combustion chamber as circular elliptical or slot orifice section.
DE19847460.1 1998-10-15

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US09581629 A-371-Of-International 2000-06-20
US10/138,246 Continuation-In-Part US6644565B2 (en) 1998-10-15 2002-05-06 Fuel injection nozzle for self-igniting internal combustion engines

Publications (1)

Publication Number Publication Date
WO2000023707A1 true WO2000023707A1 (en) 2000-04-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/002204 Ceased WO2000023707A1 (en) 1998-10-15 1999-07-16 Fuel injection nozzle for internal combustion engines with self-ignition

Country Status (6)

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

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WO2007043820A1 (en) * 2005-10-13 2007-04-19 Jinmyung21 Co., Ltd. The injection nozzle structure of injector
US8544770B2 (en) 2007-06-26 2013-10-01 Delphi Technologies Spray hole profile

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DE10105674A1 (en) * 2001-02-08 2002-08-29 Siemens Ag Fuel injection nozzle for an internal combustion engine
JP3879909B2 (en) * 2001-03-29 2007-02-14 株式会社デンソー Fuel injection device
DE10124745A1 (en) * 2001-05-21 2003-03-27 Bosch Gmbh Robert Fuel injector
DE10360773A1 (en) * 2003-12-23 2005-07-28 Robert Bosch Gmbh Fuel injector
DE102004049280A1 (en) * 2004-10-09 2006-04-13 Robert Bosch Gmbh Fuel injector
DE102006013962A1 (en) * 2006-03-27 2007-10-04 Robert Bosch Gmbh Injection nozzle with injection channels and method for introducing channels
DE102008051365B4 (en) 2008-10-15 2010-07-01 L'orange Gmbh Fuel injection valve for internal combustion engines
JP5299293B2 (en) * 2010-01-19 2013-09-25 株式会社デンソー Fuel injection valve and manufacturing method thereof
AT511880B1 (en) * 2011-09-06 2013-12-15 Bosch Gmbh Robert WEAR-OPTIMIZED MANUFACTURE OF TAPPY SPRAY HOLES
EP2884090B1 (en) 2013-12-11 2018-02-21 Continental Automotive GmbH Nozzle body and fuel injection valve
JP6247167B2 (en) * 2014-06-24 2017-12-13 トヨタ自動車株式会社 Processing method of fuel injection valve
JP2017106418A (en) * 2015-12-11 2017-06-15 株式会社デンソー Fuel injection valve and its manufacturing method
CN110805513B (en) * 2018-08-05 2021-06-01 大连理工大学 Nozzle with torsional elliptical spray holes

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DE2557772A1 (en) * 1975-12-20 1977-06-23 Kloeckner Humboldt Deutz Ag FUEL INJECTION VALVE
JPH05231273A (en) * 1992-02-19 1993-09-07 Hino Motors Ltd Fuel injection nozzle and manufacture thereof
EP0809017A1 (en) * 1996-05-22 1997-11-26 Steyr-Daimler-Puch Aktiengesellschaft Two-stage fuel injection nozzel for internal combustion engine

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US8544770B2 (en) 2007-06-26 2013-10-01 Delphi Technologies Spray hole profile

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DE59908951D1 (en) 2004-04-29
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KR100627745B1 (en) 2006-09-26
KR20010033112A (en) 2001-04-25
EP1045982A1 (en) 2000-10-25
EP1045982B1 (en) 2004-03-24
BR9917602A (en) 2002-10-01

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