EP1392969A1 - Fuel injection valve - Google Patents

Fuel injection valve

Info

Publication number
EP1392969A1
EP1392969A1 EP02742711A EP02742711A EP1392969A1 EP 1392969 A1 EP1392969 A1 EP 1392969A1 EP 02742711 A EP02742711 A EP 02742711A EP 02742711 A EP02742711 A EP 02742711A EP 1392969 A1 EP1392969 A1 EP 1392969A1
Authority
EP
European Patent Office
Prior art keywords
spray
fuel injection
injection valve
fuel
openings
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.)
Granted
Application number
EP02742711A
Other languages
German (de)
French (fr)
Other versions
EP1392969B1 (en
Inventor
Jörg HEYSE
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 EP1392969A1 publication Critical patent/EP1392969A1/en
Application granted granted Critical
Publication of EP1392969B1 publication Critical patent/EP1392969B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • 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
    • F02M51/0671—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 having an elongated valve body attached thereto
    • 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
    • F02M61/1853—Orifice plates
    • 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

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • a fuel injection system for an internal combustion engine which has an injector with a fuel jet setting plate which has first nozzle holes which are arranged along a first circle, and second nozzle holes which are arranged along a second circle.
  • the second circle has a diameter that is larger than that of the first circle.
  • the circles are arranged coaxially to a central axis of the adjustment plate.
  • Each hole axis of the second nozzle holes forms an acute angle with a reference plane that is perpendicular to the central axis of the valve body. The angle is smaller than that which is formed by each hole axis of the first nozzle holes with the reference plane.
  • atomized fuel injected through the first nozzle holes can be directed away from atomized fuel injected through the second nozzle hole.
  • the atomized fuel injected through the first nozzle holes does not interfere with the atomized fuel are injected through the second nozzle holes, which makes it possible to atomize the injected fuel appropriately.
  • a disadvantage of this prior art is that the nozzle hole spacing on an inflow side of the fuel jet setting plate is smaller than on an outside of the fuel jet setting plate facing a combustion chamber. As a result, the formation of a total injection jet, consisting of the individual fuel jets, is only possible in certain conditions. The distance of the nozzle holes must not fall below certain values, so that the stability and 'strength is ensured the Brennstoffstrahleinstellplatte.
  • a fuel injection valve for mixture-compressing, spark-ignition internal combustion engines with at least one row distributed over the circumference of the injection nozzle is known injection holes.
  • a jet-guided combustion process is implemented by forming a mixture cloud, at least one jet being ignited in.
  • Direction is directed to the spark plug.
  • Additional beams are provided, through which an at least approximately closed or coherent mixture cloud is formed.
  • the fuel injection system according to the invention with the characterizing features of the main claim has the advantage that the spray openings are evenly distributed over the surface of the Abspritzö Maschinenskalotte and also 'on the side facing the valve needle side of the Abspritzö Maschinenskalotte not occur at narrow intervals between the discharge orifices.
  • the strength of the spray opening cap is maximum.
  • Bores arranged in a flat disk are at a maximum distance from one another if the bores are evenly distributed over the disk and if the extended axes of adjacent bores are parallel to one another.
  • the spray orifices are arranged on a substantially hemispherical spray orifice cap.
  • the spray openings must be aligned so that the desired spray pattern is created.
  • the axes of the spray openings are therefore not parallel to one another. The alignment takes place in that the axes of the spray openings all intersect at a point on the side of the valve needle to the spray opening cap and the location of the spray opening on the spray opening cap determines the direction of the axis.
  • the spray orifices are moved apart so that the axes of adjacent spray orifices are spaced as far apart as possible as geometrical spatial lines, then a maximum strength of the spray orifice cap can be achieved. Since the orientation of a spray opening is then to a certain extent independent of the location of the spray opening on the spray opening cap, the spray openings can advantageously be distributed uniformly over the spray opening cap. The mistakes in the The formation of an overall spray pattern, consisting of individual fuel jets of the spray openings, which is produced by the spray openings being moved apart, is negligible.
  • the spray openings, whose axes intersect, are arranged mirror-symmetrically to the plane of symmetry and oriented so that an ellipse results in a beam cross section over all fuel jets of the spray openings.
  • a cross-section of the entire spray pattern that is elliptical across all fuel jets can be formed without all the spray orifices lying on a narrowly defined, essentially elliptical section of the surface of the spray orifice cap.
  • the spray openings can be evenly distributed over the spray opening cap.
  • the spray openings are arranged essentially in a circle around an axis of symmetry of the spray opening cap.
  • the axes of the spray orifices are tangent to a cylinder around the axis of symmetry and the fuel jets essentially form a cone at some distance from the spray orifice cap.
  • This advantageous embodiment also has the advantage over the prior art of a significantly greater strength of the spray opening cap.
  • FIG. 1 shows a schematic section through a first exemplary embodiment of a fuel injector designed according to the invention
  • FIG. 2b shows a cross section through the spray opening dome of FIG. 2a
  • FIG. 3a shows a first embodiment of a spray opening cap according to the invention in supervision for an in
  • FIG. 3b shows a cross section through the spray opening cap of FIGS. 3a and
  • Fig. 4 shows a further embodiment of a spray opening cap according to the invention in supervision for a conical overall jet pattern.
  • fuel injector 1 is designed in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • the fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
  • the 'fuel injector 1 comprises a nozzle body 2, is arranged in which a valve needle. 3
  • the valve needle 3. is in active connection with a valve closing body 4 which is connected to a valve body 5 on a valve seat arranged valve seat surface 6 cooperates to form a sealing seat.
  • the fuel injector 1 is an inwardly opening fuel injector 1 which has a plurality of openings 7.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a solenoid 10.
  • the magnet coil 10 is encapsulated in a coil housing 11 ′ and wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10.
  • the inner pole 13 and the outer pole 9 are separated from one another by a constriction 26 and connected to one another by a non-ferromagnetic connecting component 29.
  • the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
  • the plug contact 17 is surrounded by a plastic sheathing 18, which can be molded on the inner pole 13 ' .
  • the valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
  • a paired adjustment bracket 15 is used for stroke adjustment.
  • the armature 20 is located on the other side of the adjustment bracket 15. This armature is non-positively connected via a first flange 21 to the valve needle 3, which is connected to the first flange 21 by a weld seam 22 , A restoring spring 23 is supported on the first flange 21, which in the present design of the fuel injector 1 is preloaded by a sleeve 24.
  • Fuel channels 30a to 30b run in the valve needle guide 14, in the armature 20 and on the valve seat body 5.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel injector 1 is sealed by a seal 28 against a fuel line, not shown.
  • An annular damping element 32 which consists of an elastomer material, is arranged on the spray-side side of the armature '20. It's on one second ' flange 31, which is non-positively connected to the valve needle 3 via a weld 33.
  • the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 against its stroke direction in such a way that the valve closing body 4 is held in sealing contact with the valve seat 6.
  • the magnetic coil 10 When the magnetic coil 10 is excited, it builds up a magnetic field which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, the stroke being predetermined by a working gap 27 which is in the rest position between the inner pole 12 and the armature 20.
  • the armature 20 also takes the first flange 21, which is welded to the valve needle 3, in the lifting direction.
  • the valve closing body 4, which is connected to the valve needle 3, lifts off the valve seat surface 6 and the fuel is sprayed out through the spray openings 7.
  • the armature 20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23, as a result of which the first flange 21, which is connected to the valve needle 3, moves against the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, as a result of which the valve-closure member 4 is seated on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • FIG. 2a shows a spray opening cap 34 in a top view according to the prior art for an overall cross-sectional elliptical spray pattern.
  • the view corresponds to the view into the curvature of the injection opening cap 34 from the inside, viewed from the fuel injection valve 1.
  • Spray openings 35 are arranged approximately in a surface enclosed by an ellipse, and axes 36 defined by the orientation of the spray openings 35 intersect at an intersection 37.
  • FIG. 2 b shows a cross section through the spray opening cap 34 of FIG. 2 a with the spray openings 35, the axes 36 and the intersection 37.
  • the spray openings 35 must be arranged relatively close to one another in order to generate an overall jet image which is elliptical in cross section due to their orientation.
  • the injection openings 35 come very close. For manufacturing reasons, however, a minimum distance of one spray opening diameter must be maintained.
  • FIG. 3a shows a top view of the valve closing body 4 of the fuel injector 1 of FIG. 1 from a first embodiment of a spray opening dome 37 according to the invention for a cross-sectional overall jet pattern.
  • the spray opening cap 37 is made in one piece with the valve seat body 5 of FIG. 1.
  • the view corresponds to the view into the curvature of the spray opening cap 34 from the inside.
  • Spray openings 38 are arranged approximately uniformly in the spray opening cap 37 and axes 39 defined by the orientation of the spray openings 38 each intersect in pairs in a plane of symmetry 40 which is perpendicular to the plane of the spray opening cap 37, corresponding to the plane of the drawing.
  • FIG. 3b shows a cross section through the spray opening dome 37 of FIG. 3a with the spray openings 38 and the axes 39 in the plane of symmetry 40 of FIG. 3a.
  • the spray openings 38 are distributed more evenly and have a greater distance from one another, in particular on the inside of the spray opening cap 37.
  • the one from the Displacement of the spray openings -38 resulting errors in the overall spray pattern for close distances of the total injection spray to the spray nozzle dome 37 is negligible.
  • FIG. 4 shows a top view according to the view of FIG. 3a of a further embodiment of a spray opening cap 41 for a conical overall jet pattern.
  • the spray opening cap 41 has spray openings 42 arranged approximately in a circle.
  • the axes 43 defined by the orientation of the spray openings 42 lie against an imaginary cylinder in the center.
  • a direction of the jet cone center axis with respect to a fuel injector axis of 0 ° -70 °. be determined for the cone beam and an opening angle of 30 ° -100 °.
  • the spray openings 42 do not necessarily have to be arranged in a pitch circle, but can e.g. be evenly distributed in a grid pattern.
  • the invention is not limited to ⁇ the illustrated embodiments and can, for. B. can also be used to generate a hollow cone or fan beam.

Abstract

The invention relates to a fuel injection valve (1), especially for directly injecting fuel into a combustion chamber of an internal combustion engine. Said valve comprises a needle (3), a valve closing body (4) being arranged on the injection side end of said needle, co-operating with a valve face (6) formed on a valve seat body (5), in order to form a sealing seat. An injection opening cap (37), which is connected to the valve seat body (5) of the fuel injection valve (1) or embodied as a single element with the same, comprises at least three injection openings (38), and the extended axes (39) of the injection openings (38) do not all intersect each other.

Description

Brennstoffeinspritzventil Fuel injector
Stand der TechnikState of the art
Die Erfindung geht aus von eine Brennstoffeinspritzventil nach der Gattung des Hauptanspruchs .The invention relates to a fuel injector according to the preamble of the main claim.
Aus der DE 198 27 219 AI ist ein Brennstoffeinspritzsystem für eine Brennkraftmaschine bekannt, welche einen Injektor mit einer Brennstoffstrahleinstellplatte aufweist, welche erste Düsenlöcher besitzt, die entlang eines ersten Kreises angeordnet sind, sowie zweite Düsenlöcher, die entlang eines zweiten Kreises angeordnet sind. Der zweite Kreis hat einen Durchmesser, der größer als derjenige des ersten Kreises ist. Die Kreise sind dabei koaxial zu einer Mittelachse der Einstellplatte angeordnet. Jede Lochachse der zweiten Düsenlöcher bildet einen spitzen Winkel mit einer Referenzebene, die senkrecht zur Mittelachse des Ventilkörpers ist. Der Winkel ist kleiner als derjenige, der durch jede Lochachse der ersten Düsenlöcher mit der Referenzebene gebildet wird. Daher können BrennstoffZerstäubungen, die durch die ersten Düsenlöcher eingespritzt werden, weg von den BrennstoffZerstäubungen gerichtet werden, die durch die zweiten Düsenlöcher eingespritzt werden. Als Ergebnis stören die BrennstoffZerstäubungen, die durch die ersten Düsenlöcher eingespritzt werden, nicht die BrennstoffZerstäubungen, die durch die zweiten Düsenlöcher eingespritzt werden, was es ermöglicht, eingespritzten Brennstoff geeignet zu zerstäuben.From DE 198 27 219 AI, a fuel injection system for an internal combustion engine is known which has an injector with a fuel jet setting plate which has first nozzle holes which are arranged along a first circle, and second nozzle holes which are arranged along a second circle. The second circle has a diameter that is larger than that of the first circle. The circles are arranged coaxially to a central axis of the adjustment plate. Each hole axis of the second nozzle holes forms an acute angle with a reference plane that is perpendicular to the central axis of the valve body. The angle is smaller than that which is formed by each hole axis of the first nozzle holes with the reference plane. Therefore, atomized fuel injected through the first nozzle holes can be directed away from atomized fuel injected through the second nozzle hole. As a result, the atomized fuel injected through the first nozzle holes does not interfere with the atomized fuel are injected through the second nozzle holes, which makes it possible to atomize the injected fuel appropriately.
Nachteilig an diesem Stand der Technik ist, daß der Düsenlochabstand auf einer Zuflußseite der Brennstoffstrahleinstellplatte kleiner ist, als auf einer einem Brennraum zugewandten Außenseite der Brennstoffstrahleinstellplatte . Dadurch ist die Bildung eines Gesamteinspritzstrahles, bestehend aus den einzelnen Brennstoffstrahlen, nur in betim ten Vorgaben möglich. Der Abstand der Düsenlöcher darf bestimmte Werte nicht unterschreiten, damit die Stabilität und' Festigkeit der Brennstoffstrahleinstellplatte gewährleistet ist.A disadvantage of this prior art is that the nozzle hole spacing on an inflow side of the fuel jet setting plate is smaller than on an outside of the fuel jet setting plate facing a combustion chamber. As a result, the formation of a total injection jet, consisting of the individual fuel jets, is only possible in certain conditions. The distance of the nozzle holes must not fall below certain values, so that the stability and 'strength is ensured the Brennstoffstrahleinstellplatte.
Aus der DE 198 04 463 AI ist ein Brennstoffeinspritzventil für gemischverdichtende, fremdgezündete Brennkra tmaschinen mit wenigstens einer Reihe über den Umfang der Einspritzdüse verteilt angeordneten Einspritzlöchern bekannt. Durch eine gezielte Einspritzung von Brennstoff über die Einspritzlöcher wird ein strahlgeführtes Brennverfahren durch Bildung einer Gemischwolke realisiert, wobei wenigstens ein Strahl zur Zündung in . Richtung auf die Zündkerze gerichtet ist. Weitere Strahlen sind vorgesehen, durch die eine wenigstens annähernd geschlossene bzw. zusammenhängende Gemischwolke- gebildet wird.From DE 198 04 463 AI a fuel injection valve for mixture-compressing, spark-ignition internal combustion engines with at least one row distributed over the circumference of the injection nozzle is known injection holes. Through a targeted injection of fuel through the injection holes, a jet-guided combustion process is implemented by forming a mixture cloud, at least one jet being ignited in. Direction is directed to the spark plug. Additional beams are provided, through which an at least approximately closed or coherent mixture cloud is formed.
Bei diesem Stand der Technik sind die Einspritz löcher mit ihren verlängerten Achsen auf der Seite des BrennstoffZulaufs auf einen gemeinsamen Schnittpunkt der Achsen gerichtet. Eine optimale Festigkeit des Abspritzabschnitts, der von den Einspritzlöchern durchdrungen wird, kann nicht erreicht werden.In this prior art, the injection holes with their extended axes on the side of the fuel feed are directed to a common intersection of the axes. Optimal strength of the injection section, which is penetrated by the injection holes, cannot be achieved.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgerαäße Brennstoffeinspritzsystem mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß die Abspritzöffnungen gleichmäßig über der Oberfläche der Abspritzöffnungskalotte verteilt sind und auch' auf der der Ventilnadel zugewandten Seite der Abspritzöffnungskalotte keine zu engen Abstände zwischen den Abspritzöffnungen auftreten . Die Festigkeit der Abspritzöffnungskalotte ist maximal .In contrast, the fuel injection system according to the invention with the characterizing features of the main claim has the advantage that the spray openings are evenly distributed over the surface of the Abspritzöffnungskalotte and also 'on the side facing the valve needle side of the Abspritzöffnungskalotte not occur at narrow intervals between the discharge orifices. The strength of the spray opening cap is maximum.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterentwicklungen des im Hauptanspruch angegebenen Brennstof feinspritzsyste s möglich .The measures listed in the subclaims permit advantageous further developments of the fuel injection system specified in the main claim.
Von Vorteil ist es , die Abspritzöffnungen auf der Abspritzöffnungskalotte so anzuordnen und zu orientieren, daß die durchschnittlichen j eweiligen Abstände benachbarter Achsen maximal sind .It is advantageous to arrange and orient the spray openings on the spray opening cap in such a way that the average respective distances between adjacent axes are maximum.
In einer flachen Scheibe angeordnete Bohrungen haben dann untereinander einen maximalen Abstand, wenn die Bohrungen über die Scheibe gleichmäßig verteilt werden und wenn die verlängerten Achsen benachbarter Bohrungen zueinander parallel sind. Bei Brennstoffeinspritzventilen werden die Abspritzöffnungen jedoch auf einer im wesentlichen halbkugelförmigen Abspritzöffnungskalotte angeordnet. Weiterhin müssen die Abspritzöffnungen so ausgerichtet werden, daß das gewünschte Strahlbild entsteht. Die Achsen der Abspritzöffnungen sind daher nicht zueinander parallel. Die Ausrichtung erfolgt, indem die Achsen der Abspritzöffnungen sich alle in einem Punkt auf der Seite der Ventilnadel zu der Abspritzöffnungskalotte schneiden und der Ort der Abspritzöffnung auf der Abspritzöffnungskalotte die Richtung der Achse bestimmt. Werden die Abspritzöffnungen auseinander gerückt, so daß die Achsen benachbarter Abspritzöffnungen betrachtet als geometrische Raumlinien einen möglichst großen Abstand aufweisen, so kann eine maximale Festigkeit der Abspritzöffnungskalotte erreicht werden. Da die Ausrichtung einer Abspritzöffnung bis zu einem gewissen Maß dann unabhängig von dem Ort der Abspritzöffnung auf der Abspritzöffnungskalotte ist, können die Abspritzö fnungen vorteilhaft gleichmäßig auf der Abspritzöffnungskalotte verteilt werden. Die Fehler in der Bildung eines Gesamtstrahlbildes, bestehend aus einzelnen Brennstoffstrahlen der Abspritzöffnungen, der durch das Auseinanderrücken der Abspritzöffnungen entsteht, ist vernachlässigbar .Bores arranged in a flat disk are at a maximum distance from one another if the bores are evenly distributed over the disk and if the extended axes of adjacent bores are parallel to one another. In the case of fuel injection valves, however, the spray orifices are arranged on a substantially hemispherical spray orifice cap. Furthermore, the spray openings must be aligned so that the desired spray pattern is created. The axes of the spray openings are therefore not parallel to one another. The alignment takes place in that the axes of the spray openings all intersect at a point on the side of the valve needle to the spray opening cap and the location of the spray opening on the spray opening cap determines the direction of the axis. If the spray orifices are moved apart so that the axes of adjacent spray orifices are spaced as far apart as possible as geometrical spatial lines, then a maximum strength of the spray orifice cap can be achieved. Since the orientation of a spray opening is then to a certain extent independent of the location of the spray opening on the spray opening cap, the spray openings can advantageously be distributed uniformly over the spray opening cap. The mistakes in the The formation of an overall spray pattern, consisting of individual fuel jets of the spray openings, which is produced by the spray openings being moved apart, is negligible.
In einer günstigen Ausführungsform schneiden sich jeweils maximal zwei Achsen und die Schnittpunkte der sich schneidenden Achsen liegen auf einer auf der Ebene der Abspritzöffnungskalotte senkrecht stehenden Symmetrieebene . Die Abspritzöffnungen, deren Achsen sich schneiden, sind spiegelsymmetrisch zu der Symmetrieebene angeordnet und so orientiert, daß sich eine Ellipse in einem Strahlquerschitt über alle Brennstoffstrahlen der Abspritzöffnungen ergibt.In a favorable embodiment, a maximum of two axes intersect each other and the intersection points of the intersecting axes lie on a plane of symmetry that is perpendicular to the plane of the spray opening cap. The spray openings, whose axes intersect, are arranged mirror-symmetrically to the plane of symmetry and oriented so that an ellipse results in a beam cross section over all fuel jets of the spray openings.
Vorteilhaft kann ein im Querschnitt des Gesamtstrahlbildes über alle Brennstoffstrahlen elliptischer Strahlquerschitt gebildet werden, ohne daß alle Abspritzöffnungen auf einem, eng umgrenzten, im wesentlichen elliptischen Ausschnitt der Oberfläche der Abspritzöffnungskalotte liegen. Die Abspritzöffnungen können gleichmäßig über die Abspritzöffnungkalotte verteilt werden.Advantageously, a cross-section of the entire spray pattern that is elliptical across all fuel jets can be formed without all the spray orifices lying on a narrowly defined, essentially elliptical section of the surface of the spray orifice cap. The spray openings can be evenly distributed over the spray opening cap.
In einer weiteren günstigen Ausführungsform sind die Abspritzöffnungen im wesentlichen kreisförmig um eine Symmetrieachse der Abspritzöffnungskalotte angeordnet. Die Achsen der Abspritzöffnungen legen sich tangential an einen Zylinder um die Symmetrieachse an und die Brennstoffstrahlen formen in einigem Abstand von der Abspritzöffnungskalotte im wesentlichen einen Kegel.In a further favorable embodiment, the spray openings are arranged essentially in a circle around an axis of symmetry of the spray opening cap. The axes of the spray orifices are tangent to a cylinder around the axis of symmetry and the fuel jets essentially form a cone at some distance from the spray orifice cap.
Auch bei dieser günstigen Ausführungsform besteht gegenüber dem Stand der Technik der Vorteil einer deutlich größeren Festigkeit der Abspritzöffnungskalotte.This advantageous embodiment also has the advantage over the prior art of a significantly greater strength of the spray opening cap.
Zeichnungdrawing
Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen: .Fig. 1 einen schematischen Schnitt durch ein erstes Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventil s,Embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description. Show it: .Fig. 1 shows a schematic section through a first exemplary embodiment of a fuel injector designed according to the invention,
Fig. 2a -eine Abspritzöffnungskalotte in Aufsicht nach dem Stand der Technik für ein im Querschnitt elliptisches Gesamtstrahlbild in Aufsicht von dem Brennstoffeinspritzventil aus,2a a spray opening cap in supervision according to the prior art for a cross-sectional elliptical overall spray pattern in supervision from the fuel injection valve,
Fig. 2b einen Querschnitt durch die Abspritzöffnungskalotte der Fig. 2a,2b shows a cross section through the spray opening dome of FIG. 2a,
Fig. 3a eine erste erfindungsgemäße Ausführung einer Abspritzöffnungskalotte in Aufsicht für ein im3a shows a first embodiment of a spray opening cap according to the invention in supervision for an in
Querschnitt elliptisches Gesamtstrahlbild,Cross section of elliptical overall jet pattern,
Fig. 3b einen Querschnitt durch die Abspritzöffnungskalotte der Fig. 3a und3b shows a cross section through the spray opening cap of FIGS. 3a and
Fig. 4 eine weitere erfindungsgemäße Ausführung einer Abspritzöffnungskalotte in Aufsicht für ein kegelförmiges Gesamtstrahlbild.Fig. 4 shows a further embodiment of a spray opening cap according to the invention in supervision for a conical overall jet pattern.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Ein in Fig. 1 dargestelltes erstes Ausführungsbeispiel eines • erfindungsgemäßen Brennstoffeinspritzventils 1 ist in der Form eines Brennstoffeinspritzventils 1 für Brennstoffeinspritzanlagen von gemischverdichtenden, fremdgezündeten Brennkraftmaschinen ausgeführt. Das Brennstoffeinspritzventil 1 eignet' sich insbesondere zum direkten Einspritzen von Brennstoff in einen nicht dargestellten Brennraum einer Brennkraftmaschine.An illustrated in Fig. 1 a first embodiment of the invention • fuel injector 1 is designed in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines. The fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
Das ' Brennstoffeinspritzventil 1 besteht aus einem Düsenkörper 2 , in welchem eine Ventilnadel 3 angeordnet ist . Die Ventilnadel 3 . steht mit einem Ventilschließkörper 4 in Wirkverbihdung, der mit einer auf einem Ventilsi tzkörper 5 angeordneten Ventilsitzfläche 6 zu einem Dichtsitz zusammenwirkt. Bei dem Brennstoffeinspritzventil 1 handelt es sich im Ausführungsbeispiel um ein nach innen öffnendes Brennstoffeinspritzventil 1, das über mehrere Abspritzö fnungen 7 verfügt. Der Düsenkörper 2 ist durch eine Dichtung 8 gegen einen Außenpol 9 einer Magnetspule 10 abgedichtet. Die Magnetspule 10 ist in einem Spulengehäuse 11 ' gekapselt und auf einen Spulenträger 12 gewickelt, welcher an einem Innenpol 13 der Magnetspule 10 anliegt. Der Innenpol 13 und der Außenpol 9 sind durch eine Verengung 26 voneinander getrennt und miteinander durch ein nicht ferromagnetisches Verbindungsbauteil 29 verbunden. Die Magnetspule 10 wird über eine Leitung 19 von einem über einen elektrischen Steckkontakt 17 zuführbaren elektrischen Strom erregt. Der Steckkontakt 17 ist von einer Kunststoffummantelung 18 umgeben, die am Innenpol 13 angespritzt sein 'kann.The 'fuel injector 1 comprises a nozzle body 2, is arranged in which a valve needle. 3 The valve needle 3. is in active connection with a valve closing body 4 which is connected to a valve body 5 on a valve seat arranged valve seat surface 6 cooperates to form a sealing seat. In the exemplary embodiment, the fuel injector 1 is an inwardly opening fuel injector 1 which has a plurality of openings 7. The nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a solenoid 10. The magnet coil 10 is encapsulated in a coil housing 11 ′ and wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10. The inner pole 13 and the outer pole 9 are separated from one another by a constriction 26 and connected to one another by a non-ferromagnetic connecting component 29. The magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17. The plug contact 17 is surrounded by a plastic sheathing 18, which can be molded on the inner pole 13 ' .
Die Ventilnadel 3 ist in einer Ventilnadelführung 14 _ geführt, welche scheibenförmig ausgeführt ist. Zur Hubeinstellung dient eine zugepaarte Einstellschelbe 15. An, der anderen Seite der Einstellschelbe 15 befindet sich der Anker 20. -Dieser steht über einen ersten Flansch 21 kraftschlüssig mit der Ventilnadel 3 in Verbindung, welche durch eine Schweißnaht 22 mit dem ersten Flansch 21 verbunden ist. Auf dem ersten Flansch 21 stützt sich eine Rückstellfeder 23 ab, welche in der vorliegenden Bauform des Brennstoffeinspritzventils 1 durch eine Hülse 24 auf Vorspannung gebracht wird. In der Ventilnadelführung 14, im Anker 20 und am Ventilsitzkörper 5 verlaufen Brennstoffkanäle 30a bis 30b. Der Brennstoff wird über eine zentrale Brennstoffzufuhr 16 zugeführt und durch ein Filterelement 25 gefiltert. Das Brennstoffeinspritzventil 1 ist durch ' eine Dichtung 28 gegen eine nicht weiter dargestellte Brennstoffleitung abgedichtet.The valve needle 3 is guided in a valve needle guide 14, which is disc-shaped. A paired adjustment bracket 15 is used for stroke adjustment. The armature 20 is located on the other side of the adjustment bracket 15. This armature is non-positively connected via a first flange 21 to the valve needle 3, which is connected to the first flange 21 by a weld seam 22 , A restoring spring 23 is supported on the first flange 21, which in the present design of the fuel injector 1 is preloaded by a sleeve 24. Fuel channels 30a to 30b run in the valve needle guide 14, in the armature 20 and on the valve seat body 5. The fuel is supplied via a central fuel supply 16 and filtered by a filter element 25. The fuel injector 1 is sealed by a seal 28 against a fuel line, not shown.
An der abspritzseitigen Seite des Ankers '20 ist ein ringförmiges Dämpfungselement 32, welches aus einem Elastomerwerkstoff besteht, angeordnet. Es liegt auf einem zweiten 'Flansch 31 auf, welcher über eine Schweißnaht 33 kraftschlüssig mit der Ventilnadel 3 verbunden ist.An annular damping element 32, which consists of an elastomer material, is arranged on the spray-side side of the armature '20. It's on one second ' flange 31, which is non-positively connected to the valve needle 3 via a weld 33.
Im Ruhezustand des Brennstoffeinspritzventils 1 wird der Anker 20 von der Rückstellfeder 23 entgegen seiner Hubrichtung so beaufschlagt, daß der Ventilschließkörper 4 am Ventilsitz 6 in dichtender Anlage gehalten wird. Bei Erregung der Magnetspule 10 baut diese ein Magnetfeld auf, welches den Anker 20 entgegen der Federkraft der Rückstellfeder 23 in Hubrichtung bewegt, wobei der Hub durch einen in der Ruhestellung zwischen dem Innenpol 12 und dem Anker 20 befindlichen Arbeitsspalt 27 vorgegeben ist. Der Anker 20 nimmt den ersten Flansch 21, welcher mit der Ventilnadel 3 verschweißt ist, ebenfalls in Hubrichtung mit. Der mit der Ventilnadel 3 in Verbindung stehende Ventilschließkörper 4 hebt von der Ventilsitzfläche 6 ab, und der ' Brennstoff wird durch die Abspritzöffnungen 7 abgespritzt.In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 against its stroke direction in such a way that the valve closing body 4 is held in sealing contact with the valve seat 6. When the magnetic coil 10 is excited, it builds up a magnetic field which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, the stroke being predetermined by a working gap 27 which is in the rest position between the inner pole 12 and the armature 20. The armature 20 also takes the first flange 21, which is welded to the valve needle 3, in the lifting direction. The valve closing body 4, which is connected to the valve needle 3, lifts off the valve seat surface 6 and the fuel is sprayed out through the spray openings 7.
Wird der Spulenstrom abgeschaltet,- fällt der Anker 20 nach genügendem Abbau des Magnetfeldes durch den Druck der Rückstellfeder 23 vom Innenpol 13 ab, wodurch sich der mit der Ventilnadel 3 in Verbindung stehende erste Flansch 21 entgegen der Hubrichtung bewegt. Die Ventilnadel 3 wird dadurch in die gleiche Richtung bewegt, wodurch der Ventilschließkörper 4 auf der Ventilsitzfläche 6 aufsetzt und das Brennstoffeinspritzventil 1 geschlossen wird.If the coil current is switched off, the armature 20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23, as a result of which the first flange 21, which is connected to the valve needle 3, moves against the stroke direction. The valve needle 3 is thereby moved in the same direction, as a result of which the valve-closure member 4 is seated on the valve seat surface 6 and the fuel injection valve 1 is closed.
Fig. 2a zeigt zur Verdeutlichung eine Abspritzöffnungs- kalotte 34 in Aufsicht nach dem Stand der Technik für ein im Querschnitt elliptisches Gesamtstrahlbild. Die Ansicht entspricht dem Blick in die • Wölbung der Abspritzöffnungskalotte 34 von innen, von dem Brennstoffeinspritzventil 1 aus betrachtet. Abspritzöffnungen 35 sind ungefähr in einer von einer Ellipse umschlossenen Fläche angeordnet und durch die Orientierung der Abspritzöffnungen 35 definierte Achsen '36 schneiden sich in einem Schnittpunkt 37. Fig. 2b zeigt einen Querschnitt durch die Abspritzöffnungskalotte 34 der Fig. 2a mit den Abspritzöffnungen 35, den Achsen 36 und dem Schnittpunkt 37.For clarification, FIG. 2a shows a spray opening cap 34 in a top view according to the prior art for an overall cross-sectional elliptical spray pattern. The view corresponds to the view into the curvature of the injection opening cap 34 from the inside, viewed from the fuel injection valve 1. Spray openings 35 are arranged approximately in a surface enclosed by an ellipse, and axes 36 defined by the orientation of the spray openings 35 intersect at an intersection 37. FIG. 2 b shows a cross section through the spray opening cap 34 of FIG. 2 a with the spray openings 35, the axes 36 and the intersection 37.
Wie gut zu erkennen ist, müssen die Abspritzöffnungen 35 relativ nahe aneinander angeordnet werden, um durch ihre Orientierung ein im Querschnitt ellipsenför iges Gesamtstrahlbild zu erzeugen. Insbesondere auf der dem Brennstoffeinspritzventil 1 zugewandten Oberseite der Abspritzöffnungskalotte 34 kommen sich die Abspritzöffnungen 35 dabei sehr nahe. Aus fertigungstechnischen Gründen muß jedoch ein Mindestabstand von einem Abspritzöffnungs- durchmesser eingehalten werden.As can be clearly seen, the spray openings 35 must be arranged relatively close to one another in order to generate an overall jet image which is elliptical in cross section due to their orientation. In particular, on the upper side of the injection opening cap 34 facing the fuel injection valve 1, the injection openings 35 come very close. For manufacturing reasons, however, a minimum distance of one spray opening diameter must be maintained.
Fig. 3a zeigt in Aufsicht von dem Ventilschließkörper 4 des Brennstoffeinspritzventil 1 der Fig. 1 aus eine erste erfindungsgemäße Ausführung einer Abspritzöffnungskalotte 37 für ein im Querschnitt elliptisches Gesamtstrahlbild. Die Abspritzöffnungskalotte 37 ist mit dem Ventilsitzkörper 5 der Fig. 1 einstückig- ausgeführt . Die Ansicht entspricht dem Blick in die Wölbung der Abspritzöffnungskalotte 34 von innen. Abspritzöffnungen 38 sind ungefähr gleichmäßig in der Abspritzöffnungskalotte 37 angeordnet und durch die Orientierung der Abspritzöffnungen 38 definierte Achsen 39 schneiden sich jeweils paarweise in einer Symmetrieebene 40, die zu der Ebene der Abspritzöffnungskalotte 37, entsprechend der Zeichenebene, senkrecht steht.3a shows a top view of the valve closing body 4 of the fuel injector 1 of FIG. 1 from a first embodiment of a spray opening dome 37 according to the invention for a cross-sectional overall jet pattern. The spray opening cap 37 is made in one piece with the valve seat body 5 of FIG. 1. The view corresponds to the view into the curvature of the spray opening cap 34 from the inside. Spray openings 38 are arranged approximately uniformly in the spray opening cap 37 and axes 39 defined by the orientation of the spray openings 38 each intersect in pairs in a plane of symmetry 40 which is perpendicular to the plane of the spray opening cap 37, corresponding to the plane of the drawing.
Fig. 3b zeigt einen Querschnitt durch die Abspritzöffnungskalotte 37 der Fig. 3a mit den Abspritzöffnungen 38 und den Achsen 39 in der Symmetrieebene 40 der Fig. 3a.FIG. 3b shows a cross section through the spray opening dome 37 of FIG. 3a with the spray openings 38 and the axes 39 in the plane of symmetry 40 of FIG. 3a.
Durch die vorteilhafte erfindungsgemäße Anordnung und Orientierung der Abspritzöffnungen 38 ist es möglich, die Festigkeit der Abspritzöf nungskalotte 37 zu erhöhen. Die Abspritzöffnungen 38 sind gleichmäßiger verteilt und haben insbesondere an der Innenseite der Abspritzöffnungskalotte 37 einen größeren Abstand zueinander. Der aus der Verschiebung der Abspritzöffnungen -38 resultierende Fehler des Gesamtstrahlbildes für nahe Abstände des Gesamteinspritzstrahles zu der Abspritzö fnungskalotte 37 ist demgegenüber vernachlässigbar.Due to the advantageous arrangement and orientation of the spray openings 38 according to the invention, it is possible to increase the strength of the spray nozzle 37. The spray openings 38 are distributed more evenly and have a greater distance from one another, in particular on the inside of the spray opening cap 37. The one from the Displacement of the spray openings -38 resulting errors in the overall spray pattern for close distances of the total injection spray to the spray nozzle dome 37 is negligible.
In Fig. 4 ist in Aufsicht entsprechend der Ansicht der Fig. 3a eine weitere erfindungsgemäße Ausführung einer Abspritzöffnungskalotte 41 für ein kegelförmiges Gesamtstrahlbild dargestellt. Die Abspritzöffnungskalotte 41 weist ungefähr kreisförmig angeordnete Abspritzöffnungen 42 auf. Die durch die Orientierung der Abspritzöffnungen 42 definierten Achsen 43 legen sich mittig an einen gedachten Zylinder an.FIG. 4 shows a top view according to the view of FIG. 3a of a further embodiment of a spray opening cap 41 for a conical overall jet pattern. The spray opening cap 41 has spray openings 42 arranged approximately in a circle. The axes 43 defined by the orientation of the spray openings 42 lie against an imaginary cylinder in the center.
Für ein kegelförmiges Gesamtstrahlbild werden hierdurch dieselben Vorteile erreicht, wie zuvor bereits geschildert. Insbesondere kann eine Richtung der Strahlkegelmittelachse gegenüber einer Brennstoffeinspritzventilachse von 0°-70° . für den Kegelstrahl bestimmt werden und ein Öffnungswinkel von 30°-100°. Auch müssen die Abspritzöffnungen 42 nicht zwingend in einem Teilkreis angeordnet sein, sondern können z.B. gleichmäßig rasterförmig verteilt sein.In this way, the same advantages as previously described are achieved for a conical overall jet image. In particular, a direction of the jet cone center axis with respect to a fuel injector axis of 0 ° -70 °. be determined for the cone beam and an opening angle of 30 ° -100 °. The spray openings 42 do not necessarily have to be arranged in a pitch circle, but can e.g. be evenly distributed in a grid pattern.
Die Erfindung ist nicht auf ■ die dargestellten Ausführungsbeispiele beschränkt und kann z. B. auch zur Erzeugung eines Hohlkegel oder Fächerstrahls verwendet werden. The invention is not limited to ■ the illustrated embodiments and can, for. B. can also be used to generate a hollow cone or fan beam.

Claims

Ansprüche Expectations
1. Brennstoffeinspritzventil (1), insbesondere zum direkten Einspritzen von Brennstoff in einen Brennraum einer1. Fuel injection valve (1), in particular for injecting fuel directly into a combustion chamber
Brennkraftmaschine, mit einer Ventilnadel (3) , die an ihrem abspritzseitigen Ende einen Ventilschließkörper (4) aufweist, der mit einer Ventilsitzfläche (6), die an einem Ventilsitzkörper (5) ausgebildet ist, zu einem Dichtsitz zusammenwirkt, und einer mit dem Ventilsitzkörper (5) des Brennstoffeinspritzventils (1) verbundenen oder mit diesem einstückig ausgebildeten Abspritzöffnungskalotte (37,41), dadurch gekennzeichnet, daß die Abspritzöffnungskalotte (37,41) zumindest drei Abspritzöffnungen (38,42) aufweist, wobei verlängerte Achsen (39,43) der Abspritzöffnungen (38,42) sich nicht alle schneiden.Internal combustion engine, with a valve needle (3) which has a valve closing body (4) at its spray-side end, which cooperates with a valve seat surface (6), which is formed on a valve seat body (5), to form a sealing seat, and one with the valve seat body ( 5) of the fuel injection valve (1) connected to or integrally formed with this spray opening cap (37,41), characterized in that the spray opening cap (37,41) has at least three spray openings (38,42), with extended axes (39,43) Spray openings (38, 42) do not all intersect.
2. Brennstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die Abspritzöffnungen (38,42) auf der Abspritzöffnungskalotte (37,41) so angeordnet und orientiert sind, daß die durchschnittlichen jeweiligen Abstände benachbarter Achsen (39,43) maximal sind.2. Fuel injection valve according to claim 1, characterized in that the spray openings (38,42) on the spray opening cap (37,41) are arranged and oriented so that the average respective distances between adjacent axes (39,43) are maximum.
3. Brennstoffeinspritzventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß -sich jeweils maximal zwei Achsen (39) schneiden. 3. Fuel injection valve according to claim 1 or 2, characterized in that -second intersect a maximum of two axes (39).
4. Brennstoffeinspritzventil nach Anspruch 3, dadurch gekennzeichnet, daß die Schnittpunkte der sich schneidenden Achsen (39) auf einer auf der Ebene der Abspritzöffnungskalotte (37) senkrecht stehenden Symmetrieebene (40) liegen.4. Fuel injection valve according to claim 3, characterized in that the intersection points of the intersecting axes (39) lie on a plane of symmetry (40) which is perpendicular to the plane of the spray opening cap (37).
5. Brennstoffeinspritzventil nach Anspruch 4, dadurch gekennzeichnet, daß die Abspritzöffnungen (38), deren Achsen (39) sich schneiden, spiegelsymmetrisch zu der Sy rαetrieebene (40) angeordnet sind.5. Fuel injection valve according to claim 4, characterized in that the spray openings (38), whose axes (39) intersect, are arranged mirror-symmetrically to the Sy rαetrieebene (40).
6. Brennstoffeinspritzventil nach Anspruch 5, dadurch gekennzeichnet, daß die Abspritzöffnungen (38) so orientiert sind, daß sich eine Ellipse in einem Querschnitt eines Gesamtstrahlbildes über Brennstoffstrahlen der Abspritzöffnungen (28) ergibt.6. Fuel injection valve according to claim 5, characterized in that the spray openings (38) are oriented so that there is an ellipse in a cross section of an overall spray pattern over fuel jets of the spray openings (28).
7. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Abspritzöffnungen rasterförmig angeordnet sind.7. Fuel injection valve according to one of claims 1 to 6, characterized in that the spray openings are arranged in a grid.
8. Brennstoffeinspritzventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Abspritzöffnungen (41) im wesentlichen kreisförmig um eine Symmetrieachse der Abspritzöffnungskalotte (41) angeordnet sind.8. Fuel injection valve according to claim 1 or 2, characterized in that the spray openings (41) are arranged substantially circularly around an axis of symmetry of the spray opening cap (41).
9. Brennstoffeinspritzventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Abspritzöffnungen rasterförmig angeordnet sind.9. Fuel injection valve according to claim 1 or 2, characterized in that the spray openings are arranged in a grid.
10. Brennstoffeinspritzventil nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß die Achsen (43) der Abspritzöffnungen (40) sich tangential an einen Zylinder um die Symmetrieachse anlegen. 10. Fuel injection valve according to claim 8 or 9, characterized in that the axes (43) of the spray orifices (40) lie tangentially to a cylinder about the axis of symmetry.
11. Brennstoffeinspritzventil nach einem der Ansprüche 8 bis11. Fuel injection valve according to one of claims 8 to
10, dadurch gekennzeichnet, daß Brennstoffstrahlen der Abspritzöffnungen (40) in einigem10, characterized in that fuel jets of the spray openings (40) in some
Abstand vo der Abspritzöffnungskalotte (41) im wesentlichen einen Kegel als ein Gesamtstrahlbild über alleDistance from the spray opening dome (41) is essentially a cone as a total spray pattern over all
Brennstoffstrahlen formen. Shape fuel jets.
EP02742711A 2001-05-16 2002-05-07 Fuel injection valve Expired - Lifetime EP1392969B1 (en)

Applications Claiming Priority (3)

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DE10123859A DE10123859B4 (en) 2001-05-16 2001-05-16 Fuel injector
DE10123859 2001-05-16
PCT/DE2002/001630 WO2002097262A1 (en) 2001-05-16 2002-05-07 Fuel injection valve

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WO2002097262A1 (en) 2002-12-05
JP2004519624A (en) 2004-07-02
US7017839B2 (en) 2006-03-28
KR20030023701A (en) 2003-03-19
KR100853640B1 (en) 2008-08-25
DE50214169D1 (en) 2010-03-04
EP1392969B1 (en) 2010-01-13
DE10123859A1 (en) 2002-11-28
US20040026538A1 (en) 2004-02-12

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