EP1559906A2 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

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Publication number
EP1559906A2
EP1559906A2 EP05001507A EP05001507A EP1559906A2 EP 1559906 A2 EP1559906 A2 EP 1559906A2 EP 05001507 A EP05001507 A EP 05001507A EP 05001507 A EP05001507 A EP 05001507A EP 1559906 A2 EP1559906 A2 EP 1559906A2
Authority
EP
European Patent Office
Prior art keywords
fuel injection
valve
injection valve
groove
seat
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.)
Withdrawn
Application number
EP05001507A
Other languages
German (de)
French (fr)
Other versions
EP1559906A3 (en
Inventor
Guenther Hohl
Detlef Nowak
Marco Vorbach
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 EP1559906A2 publication Critical patent/EP1559906A2/en
Publication of EP1559906A3 publication Critical patent/EP1559906A3/en
Withdrawn legal-status Critical Current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
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus 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
    • 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
    • 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
    • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other

Definitions

  • the invention is based on a fuel injection valve according to the preamble of the main claim.
  • valve closing body acts with a valve seat body to a sealing seat together.
  • the Spray opening is formed ringpaltförmig.
  • the Tear-off edge protrudes unprotected from combustion chamber gases directly into the combustion chamber.
  • a disadvantage of the above-mentioned document known fuel injection valve is in particular that in the area of the spoiler edge, in particular in the Spray opening, can easily form deposits.
  • the Abspritzgeometrie of the sprayed Fuel is affected unfavorably.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the formation of disturbing Deposits in the area of the injection opening by simple Medium is greatly reduced.
  • valve closing body widens in Spout-side region conical, conical in cross-section to the discharge end on. This allows the groove in simply arranged in the fuel injection valve become.
  • Another advantage is that the sealing seat immediately the groove adjoins. As a result, the stall edge can be very be arranged close to the sealing seat and the fuel with already high speed at the spoiler edge sweep past.
  • the stall can be ensured.
  • the groove by grinding produce. This allows the groove to be very simple, accurate and be produced inexpensively.
  • FIG. 1 example of a generic Fuel injection valve 1 is in the form of a Fuel injection valve 1 for fuel injection systems of mixture-compacting, externally ignited Internal combustion engine running.
  • the Fuel injector 1 is particularly suitable for direct injection of fuel into one illustrated combustion chamber of an internal combustion engine.
  • the fuel injection valve 1 consists of a Nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 has a discharge side Valve-closing body 4, which with one on one Valve seat body 5 arranged valve seat surface 6 to a Tight fit together.
  • In the fuel injection valve 1 is it in the exemplary embodiment to an inward opening fuel injection valve 1, which via a Spray opening 7 has.
  • the nozzle body 2 is through a Seal 8 against an outer pole 9 of a magnetic coil 10th sealed.
  • the magnetic coil 10 is in a coil housing 11 encapsulated and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the Solenoid 10 is connected via an electrical line 19 of one via an electrical plug contact 17 can be fed electrical current.
  • the plug contact 17 is of a Plastic casing 18 surrounded, the inner pole 13th can be injected.
  • the valve needle 3 is in a valve needle guide fourteenth guided, which is designed disk-shaped. to Stroke adjustment is a paired shim 15. An the other side of the dial 15 is the Anchor 20. This is about a first flange 21 with the Valve needle 3 in conjunction, which by a weld 22 is connected to the first flange 21. On the first Flange 21 is supported by a helical return spring 23 which in the present design of the Fuel injection valve 1 by a sleeve 24 Bias is brought.
  • the armature 20 and a Guide element 36 extend fuel channels 30, 31 and 32nd
  • the fuel is via a central fuel supply 16 supplied and filtered by a filter element 25.
  • the Fuel injection valve 1 is through a rubber ring 28th against a not shown Fuel distribution line and by a seal 37 against sealed a cylinder head, not shown.
  • annular damping element 33 On the discharge side of the armature 20 is a annular damping element 33, which consists of a Elastomer material consists, arranged. It lies on one second flange 34, which via a weld 35th cohesively connected to the valve needle 3.
  • the armature 20 drops sufficient reduction of the magnetic field by the pressure of the Return spring 23 from the inner pole 13, causing the with the valve needle 3 in communication first flange 21st moved against the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, causing the Valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • Fig. 2 shows a schematic section of the Embodiment of the invention Fuel injection valve 1 in the discharge side area.
  • the fuel injection valve 1 opens to the outside.
  • the Valve-closing body 4 is integral with the valve needle 3 executed and widens conically or in Cross-section conical in the direction of injection.
  • the valve closing body 4 a first surface 41 which is coaxial and perpendicular to a Center axis 43 of the valve needle 3 is formed.
  • a conical or frustoconical design possible.
  • the surface 42 is in Cross-section straight and arranged so that the Spray-side end of the fuel injection valve. 1 expanded conically against the spray direction.
  • the second Surface 42 extends from the valve closing body 4 to the valve seat body 5 via the injection opening 7, which as an annular gap between the valve seat body 5 with the Valve seat surface 6 and the valve closing body 4 is formed is.
  • a groove 38 is in the embodiment shown in the embedded second surface 42.
  • the cone-shaped in Abspritzterrorism widening surface of the Valve closing body 4 opposite valve seat surface. 6 also widens conically. At the downstream End of the opposite, tapered surface of valve closing body 4 and valve seat surface 6 is the groove 38 arranged.
  • the groove 38 has a trough-like shape in cross-section and is in the embodiment in equal parts respectively partially in the valve seat body 5 and in the valve closing body. 4 arranged.
  • the groove 38 is immediately downstream of the Seating seat arranged.
  • the fuel flows when open Sealing seat from the spray opening 7, wherein on by two Steps 40 formed stall edges 39, of which one on the valve closing body 4 and one on Valve seat body 5 is formed, the fuel flow interrupted.
  • the stall edges 39 and the region of Stall edges 39 are not through the groove 38 from shown combustion chamber away, in the Fuel injection valve 1 set back. at closed sealing seat are the stall edges 39 in Embodiment at the same height of the injection opening. 7 arranged.
  • the invention is not limited to that shown Embodiment limited.
  • the features of the embodiment may be in any Be combined with each other.

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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 fuel injection valve has an actuator and valve closure body (4) interacting with valve seat (6) to provide a sealing seat. The valve seat body (5) has a discharge opening (7) which has at the downstream end flow discharge edges (39) running in a groove (38). The sealing seat directly adjoins the groove. The groove can be disposed partially in the valve closure body and partially in the valve seat body. When the sealing seat is closed the flow discharge edges are arranged at the same height.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Hauptanspruchs.The invention is based on a fuel injection valve according to the preamble of the main claim.

Beispielsweise ist aus der DE 101 52 415 A1 ein nach außen öffnendes Brennstoffeinspritzventil mit einem kegelförmigen Ventilschließkörper bekannt. Der Ventilschließkörper wirkt mit einem Ventilsitzkörper zu einem Dichtsitz zusammen. Die Abspritzöffnung ist ringspaltförmig ausgebildet. Der austretende Brennstoff strömt in der Abspritzöffnung zwischen Ventilsitzkörper und Ventilschließkörper aus der Abspritzöffnung, wobei die Brennstoffströmung am abspritzseitigen Ende des Ventilschließkörpers und des Ventilsitzkörpers abrupt an einer Abrisskante abreist. Die Abrisskante ragt ungeschützt vor Brennraumgasen unmittelbar in den Brennraum hinein.For example, from DE 101 52 415 A1 an outward opening fuel injector with a cone-shaped Valve closing body known. The valve closing body acts with a valve seat body to a sealing seat together. The Spray opening is formed ringpaltförmig. Of the escaping fuel flows in the spray orifice between valve seat body and valve closing body of the Spray opening, wherein the fuel flow at discharge-side end of the valve closing body and the Abruptly valve seat body abrupt at a spoiler edge. The Tear-off edge protrudes unprotected from combustion chamber gases directly into the combustion chamber.

Nachteilig bei dem aus der obengenannten Druckschrift bekannten Brennstoffeinspritzventil ist insbesondere, daß sich im Bereich der Abrisskante, insbesondere in der Abspritzöffnung, leicht Ablagerungen bilden können. Insbesondere die Abspritzgeometrie des abgespritzten Brennstoffes wird dabei unvorteilhaft beeinflußt. A disadvantage of the above-mentioned document known fuel injection valve is in particular that in the area of the spoiler edge, in particular in the Spray opening, can easily form deposits. In particular, the Abspritzgeometrie of the sprayed Fuel is affected unfavorably.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Brennstoffeinspritzventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß die Bildung von störenden Ablagerungen im Bereich der Abspritzöffnung durch einfache Mittel stark vermindert wird.The fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the formation of disturbing Deposits in the area of the injection opening by simple Medium is greatly reduced.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterentwicklungen des im Hauptanspruch angegebenen Brennstoffeinspritzventils möglich.By the measures listed in the dependent claims are advantageous developments of the main claim specified fuel injector possible.

Vorteilhafterweise weitet sich der Ventilschließkörper im abspritzseitigen Bereich kegelförmig, im Querschnitt konisch bis zum abspritzseitigen Ende auf. Dadurch kann die Nut in einfacher Weise im Brennstoffeinspritzventil angeordnet werden.Advantageously, the valve closing body widens in Spout-side region conical, conical in cross-section to the discharge end on. This allows the groove in simply arranged in the fuel injection valve become.

Von Vorteil ist außerdem, daß der Dichtsitz unmittelbar an die Nut angrenzt. Dadurch kann die Strömungsabrisskante sehr nahe am Dichtsitz angeordnet werden und der Brennstoff mit bereits hoher Geschwindigkeit an der Abrisskante vorbeistreichen.Another advantage is that the sealing seat immediately the groove adjoins. As a result, the stall edge can be very be arranged close to the sealing seat and the fuel with already high speed at the spoiler edge sweep past.

Durch die stufenförmige Ausbildung der Abrisskanten in der Nut kann der Strömungsabriss sichergestellt werden.Due to the step-shaped design of the tear-off edges in the Groove, the stall can be ensured.

Vorteilhaft ist es zudem, die Nut durch Schleifen zu erzeugen. Dadurch kann die Nut sehr einfach, genau und kostengünstig hergestellt werden.It is also advantageous, the groove by grinding produce. This allows the groove to be very simple, accurate and be produced inexpensively.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Fig. 1
einen schematischen Schnitt durch ein Beispiel eines gattungsgemäß ausgestalteten Brennstoffeinspritzventils und
Fig. 2
einen schematischen Schnitt des Ausführungsbeispiels des erfindungsgemäßen Brennstoffeinspritzventils im abspritzseitigen Bereich.
An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description. Show it:
Fig. 1
a schematic section through an example of a generic designed fuel injector and
Fig. 2
a schematic section of the embodiment of the fuel injection valve according to the invention in the discharge side region.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Nachfolgend wird ein Ausführungsbeispiel der Erfindung beispielhaft beschrieben. Übereinstimmende Bauteile sind dabei mit übereinstimmenden Bezugszeichen versehen.Hereinafter will be an embodiment of the invention described by way of example. Matching components are while provided with matching reference numerals.

Bevor anhand der Fig. 2 ein bevorzugtes erfindungsgemäßes Ausführungsbeispiel näher beschrieben wird, soll zum besseren Verständnis der Erfindung zunächst anhand von Fig. 1 ein gattungsgemäßes Brennstoffeinspritzventil bezüglich seiner wesentlichen Bauteile kurz erläutert werden.Before with reference to FIG. 2, a preferred inventive Embodiment described in more detail, is intended to better understanding of the invention initially with reference to FIG. 1 with respect to a generic fuel injection valve its essential components are briefly explained.

Ein in Fig. 1 dargestelltes Beispiel eines gattungsgemäßen 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 example of a generic Fuel injection valve 1 is in the form of a Fuel injection valve 1 for fuel injection systems of mixture-compacting, externally ignited Internal combustion engine running. The Fuel injector 1 is particularly suitable for direct injection of fuel into one illustrated combustion chamber of an internal combustion engine.

Das Brennstoffeinspritzventil 1 besteht aus einem Düsenkörper 2, in welchem eine Ventilnadel 3 angeordnet ist. Die Ventilnadel 3 weist abspritzseitig einen Ventilschließkörper 4 auf, der mit einer auf einem Ventilsitzkörper 5 angeordneten Ventilsitzfläche 6 zu einem Dichtsitz zusammenwirkt. Bei dem Brennstoffeinspritzventil 1 handelt es sich im Ausführungsbeispiel um ein nach innen öffnendes Brennstoffeinspritzventil 1, welches über eine Abspritzöffnung 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 einen Abstand 26 voneinander getrennt und miteinander durch ein nicht ferromagnetisches Verbindungsbauteil 29 verbunden. Die Magnetspule 10 wird über eine elektrische 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 injection valve 1 consists of a Nozzle body 2, in which a valve needle 3 is arranged. The valve needle 3 has a discharge side Valve-closing body 4, which with one on one Valve seat body 5 arranged valve seat surface 6 to a Tight fit together. In the fuel injection valve 1 is it in the exemplary embodiment to an inward opening fuel injection valve 1, which via a Spray opening 7 has. The nozzle body 2 is through a Seal 8 against an outer pole 9 of a magnetic coil 10th sealed. The magnetic coil 10 is in a coil housing 11 encapsulated and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10. Of the Inner pole 13 and the outer pole 9 are separated by a distance 26th separated from each other and not by one another ferromagnetic connecting member 29 connected. The Solenoid 10 is connected via an electrical line 19 of one via an electrical plug contact 17 can be fed electrical current. The plug contact 17 is of a Plastic casing 18 surrounded, the inner pole 13th can be injected.

Die Ventilnadel 3 ist in einer Ventilnadelführung 14 geführt, welche scheibenförmig ausgeführt ist. Zur Hubeinstellung dient eine zugepaarte Einstellscheibe 15. An der anderen Seite der Einstellscheibe 15 befindet sich der Anker 20. Dieser steht über einen ersten Flansch 21 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 spiralförmige Rückstellfeder 23 ab, welche in der vorliegenden Bauform des Brennstoffeinspritzventils 1 durch eine Hülse 24 auf Vorspannung gebracht wird.The valve needle 3 is in a valve needle guide fourteenth guided, which is designed disk-shaped. to Stroke adjustment is a paired shim 15. An the other side of the dial 15 is the Anchor 20. This is about a first flange 21 with the Valve needle 3 in conjunction, which by a weld 22 is connected to the first flange 21. On the first Flange 21 is supported by a helical return spring 23 which in the present design of the Fuel injection valve 1 by a sleeve 24 Bias is brought.

In der Ventilnadelführung 14, im Anker 20 und an einem Führungselement 36 verlaufen Brennstoffkanäle 30, 31 und 32. Der Brennstoff wird über eine zentrale Brennstoffzufuhr 16 zugeführt und durch ein Filterelement 25 gefiltert. Das Brennstoffeinspritzventil 1 ist durch einen Gummiring 28 gegen eine nicht weiter dargestellte Brennstoffverteilerleitung und durch eine Dichtung 37 gegen einen nicht weiter dargestellten Zylinderkopf abgedichtet.In the valve needle guide 14, the armature 20 and a Guide element 36 extend fuel channels 30, 31 and 32nd The fuel is via a central fuel supply 16 supplied and filtered by a filter element 25. The Fuel injection valve 1 is through a rubber ring 28th against a not shown Fuel distribution line and by a seal 37 against sealed a cylinder head, not shown.

An der abspritzseitigen Seite des Ankers 20 ist ein ringförmiges Dämpfungselement 33, welches aus einem Elastomerwerkstoff besteht, angeordnet. Es liegt auf einem zweiten Flansch 34 auf, welcher über eine Schweißnaht 35 stoffschlüssig mit der Ventilnadel 3 verbunden ist. On the discharge side of the armature 20 is a annular damping element 33, which consists of a Elastomer material consists, arranged. It lies on one second flange 34, which via a weld 35th cohesively connected to the valve needle 3.

Im Ruhezustand des Brennstoffeinspritzventils 1 wird der Anker 20 von der Rückstellfeder 23 entgegen seiner Hubrichtung so beaufschlagt, daß der Ventilschließkörper 4 an der Ventilsitzfläche 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 druckbehaftet zugeführte Brennstoff wird durch die Abspritzöffnung 7 in den nicht dargestellten Brennraum abgespritzt.In the idle state of the fuel injection valve 1 is the Anchor 20 of the return spring 23 against its Lifting direction acted upon so that the valve closing body. 4 held on the valve seat 6 in sealing contact becomes. Upon energization of the solenoid 10, this builds Magnetic field, which the armature 20 against the spring force the return spring 23 is moved in the stroke direction, wherein the stroke by a in the rest position between the inner pole 12 and the armature 20 located working gap 27 is specified. The armature 20 takes the first flange 21, which with the Valve needle 3 is welded, also in the stroke direction with. The standing with the valve needle 3 in connection Valve closing body 4 lifts off from the valve seat surface 6, and the pressurized fuel supplied by the Spray opening 7 in the combustion chamber, not shown hosed.

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 turned off, the armature 20 drops sufficient reduction of the magnetic field by the pressure of the Return spring 23 from the inner pole 13, causing the with the valve needle 3 in communication first flange 21st moved against the stroke direction. The valve needle 3 is thereby moved in the same direction, causing the Valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve 1 is closed.

Fig. 2 zeigt einen schematischen Schnitt des Ausführungsbeispiels des erfindungsgemäßen Brennstoffeinspritzventils 1 im abspritzseitigen Bereich. Das Brennstoffeinspritzventil 1 öffnet nach außen. Der Ventilschließkörper 4 ist mit der Ventilnadel 3 einstückig ausgeführt und erweitert sich kegelförmig bzw. im Querschnitt konisch in Abspritzrichtung. An seinem abspritzseitigen Ende weist der Ventilschließkörper 4 eine erste Fläche 41 auf, die koaxial und rechtwinklig zu einer Mittelachse 43 der Ventilnadel 3 ausgebildet ist. Alternativ ist auch eine kegel- oder kegelstumpfförmige Ausbildung möglich. Im radialen Außenbereich der Fläche 41 geht diese in eine zweite Fläche 42 über. Die Fläche 42 ist im Querschnitt geradlinig und so angeordnet, daß sich das abspritzseitige Ende des Brennstoffeinspritzventils 1 entgegen der Abspritzrichtung konisch erweitert. Die zweite Fläche 42 erstreckt sich vom Ventilschließkörper 4 bis auf den Ventilsitzkörper 5 über die Abspritzöffnung 7, welche als Ringspalt zwischen dem Ventilsitzkörper 5 mit der Ventilsitzfläche 6 und dem Ventilschließkörper 4 ausgebildet ist. Eine Nut 38 ist im gezeigten Ausführungsbeispiel in der zweiten Fläche 42 eingelassen. Die der sich kegelförmig in Abspritzrichtung aufweitenden Fläche des Ventilschließkörpers 4 gegenüberliegende Ventilsitzfläche 6 weitet sich ebenfalls kegelförmig auf. Am stromabwärtigen Ende der sich gegenüberliegenden, konisch zulaufenden Fläche von Ventilschließkörper 4 und Ventilsitzfläche 6 ist die Nut 38 angeordnet.Fig. 2 shows a schematic section of the Embodiment of the invention Fuel injection valve 1 in the discharge side area. The fuel injection valve 1 opens to the outside. Of the Valve-closing body 4 is integral with the valve needle 3 executed and widens conically or in Cross-section conical in the direction of injection. At his discharge-side end, the valve closing body 4 a first surface 41 which is coaxial and perpendicular to a Center axis 43 of the valve needle 3 is formed. alternative is also a conical or frustoconical design possible. In the radial outer region of the surface 41 this goes in a second surface 42 via. The surface 42 is in Cross-section straight and arranged so that the Spray-side end of the fuel injection valve. 1 expanded conically against the spray direction. The second Surface 42 extends from the valve closing body 4 to the valve seat body 5 via the injection opening 7, which as an annular gap between the valve seat body 5 with the Valve seat surface 6 and the valve closing body 4 is formed is. A groove 38 is in the embodiment shown in the embedded second surface 42. The cone-shaped in Abspritzrichtung widening surface of the Valve closing body 4 opposite valve seat surface. 6 also widens conically. At the downstream End of the opposite, tapered surface of valve closing body 4 and valve seat surface 6 is the groove 38 arranged.

Die Nut 38 weist im Querschnitt eine wannenartige Form auf und ist im Ausführungsbeispiel zu gleichen Teilen jeweils teilweise im Ventilsitzkörper 5 und im Ventilschließkörper 4 angeordnet. Die Nut 38 ist unmittelbar stromabwärtig des Dichtsitzes angeordnet. Der Brennstoff strömt bei geöffnetem Dichtsitz aus der Abspritzöffnung 7, wobei an durch zwei Stufen 40 gebildeten Strömungsabrisskanten 39, von denen jeweils eine am Ventilschließkörper 4 und eine am Ventilsitzkörper 5 ausgebildet ist, die Brennstoffströmung abreißt. Die Strömungsabrisskanten 39 und der Bereich der Strömungsabrisskanten 39 sind durch die Nut 38 vom nicht dargestellten Brennraum weg, in das Brennstoffeinspritzventil 1 zurückversetzt. Bei geschlossenem Dichtsitz sind die Strömungsabrisskanten 39 im Ausführungsbeispiel auf gleicher Höhe der Abspritzöffnung 7 angeordnet.The groove 38 has a trough-like shape in cross-section and is in the embodiment in equal parts respectively partially in the valve seat body 5 and in the valve closing body. 4 arranged. The groove 38 is immediately downstream of the Seating seat arranged. The fuel flows when open Sealing seat from the spray opening 7, wherein on by two Steps 40 formed stall edges 39, of which one on the valve closing body 4 and one on Valve seat body 5 is formed, the fuel flow interrupted. The stall edges 39 and the region of Stall edges 39 are not through the groove 38 from shown combustion chamber away, in the Fuel injection valve 1 set back. at closed sealing seat are the stall edges 39 in Embodiment at the same height of the injection opening. 7 arranged.

Beispielsweise kann die Nut 38 in einfacher Weise durch Schleifen des Dichtsitzes erzeugt werden.For example, the groove 38 in a simple manner Grinding the sealing seat are generated.

Die Erfindung ist nicht auf das dargestellte Ausführungsbeispiel beschränkt. The invention is not limited to that shown Embodiment limited.

Die Merkmale des Ausführungsbeispiels können in beliebiger Weise miteinander kombiniert werden.The features of the embodiment may be in any Be combined with each other.

Claims (8)

Brennstoffeinspritzventil (1) mit einem Aktor, einem mit dem Aktor in Wirkverbindung stehenden Ventilschließkörper (4), der mit einer an einem Ventilsitzkörper (5) angeordneten Ventilsitzfläche (6) zu einem Dichtsitz zusammenwirkt, und einer im Ventilsitzkörper (5) angeordneten Abspritzöffnung (7),
dadurch gekennzeichnet, daß am stromabwärtigen Ende der Abspritzöffnung (7) in einer Nut (38) verlaufende Strömungsabrisskanten (39) angeordnet sind.Fuel injection valve (1) having an actuator, a valve-closing body (4) operatively connected to the actuator, which cooperates with a valve seat surface (6) arranged on a valve seat body (5) to form a sealing seat, and an ejection opening (7) arranged in the valve seat body (5) )
characterized in that at the downstream end of the ejection opening (7) in a groove (38) extending flow separation edges (39) are arranged. Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, daß das Brennstoffeinspritzventil (1) nach außen öffnet.Fuel injection valve according to claim 1,
characterized in that the fuel injection valve (1) opens to the outside. Brennstoffeinspritzventil nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß sich der Ventilschließkörper (4) im abspritzseitigen Bereich kegelförmig, im Querschnitt konisch bis zum abspritzseitigen Ende aufweitet.Fuel injection valve according to claim 1 or 2,
characterized in that the valve closing body (4) in the discharge-side region conically widens in cross-section conically up to the discharge end. Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß der Dichtsitz unmittelbar an die Nut (38) angrenzt. Fuel injection valve according to one of the preceding claims,
characterized in that the sealing seat immediately adjacent to the groove (38). Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß die Strömungsabrisskanten (39) durch zumindest eine Stufe (40) der Nut (38) gebildet ist.Fuel injection valve according to one of the preceding claims,
characterized in that the flow separation edges (39) are formed by at least one step (40) of the groove (38). Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß die Nut (38) teilweise im Ventilschließkörper (4) und teilweise im Ventilsitzkörper (5) angeordnet ist.Fuel injection valve according to one of the preceding claims,
characterized in that the groove (38) is arranged partially in the valve closing body (4) and partially in the valve seat body (5). Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß bei geschlossenem Dichtsitz die Strömungsabrisskanten (39) auf gleicher Höhe angeordnet sind.Fuel injection valve according to one of the preceding claims,
characterized in that the flow separation edges (39) are arranged at the same height when the sealing seat is closed. Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß die Nut (38) durch Schleifen erzeugt ist.Fuel injection valve according to one of the preceding claims,
characterized in that the groove (38) is generated by grinding.
EP05001507A 2004-01-28 2005-01-26 Fuel injection valve Withdrawn EP1559906A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004004169 2004-01-28
DE200410004169 DE102004004169A1 (en) 2004-01-28 2004-01-28 Fuel injector

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EP1559906A2 true EP1559906A2 (en) 2005-08-03
EP1559906A3 EP1559906A3 (en) 2007-02-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2613396A (en) * 2021-12-02 2023-06-07 Delphi Tech Ip Ltd Fuel injector suitable for gaseous fuel

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10152415A1 (en) 2001-10-24 2003-06-18 Bosch Gmbh Robert Fuel injector

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3740462A1 (en) * 1987-11-28 1989-06-08 Bosch Gmbh Robert Method for finishing valve needles for fuel-injection nozzles
JP2819702B2 (en) * 1989-12-12 1998-11-05 株式会社デンソー Fuel injection valve
US5522550A (en) * 1992-06-10 1996-06-04 Robert Bosch Gmbh Injection nozzle for internal combustion engines
DE29504898U1 (en) * 1995-03-23 1996-07-25 FEV Motorentechnik GmbH & Co. KG, 52078 Aachen Valve nozzle
JPH1137016A (en) * 1997-07-18 1999-02-09 Zexel Corp Fuel injection nozzle
AUPQ708100A0 (en) * 2000-04-20 2000-05-18 Orbital Engine Company (Australia) Proprietary Limited Deposit control in fuel injector nozzles
US20040256494A1 (en) * 2003-06-03 2004-12-23 Varble Daniel L. Outwardly-opening fuel injector
DE102004053351B4 (en) * 2004-11-04 2007-06-14 Siemens Ag Valve for injecting fuel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10152415A1 (en) 2001-10-24 2003-06-18 Bosch Gmbh Robert Fuel injector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2613396A (en) * 2021-12-02 2023-06-07 Delphi Tech Ip Ltd Fuel injector suitable for gaseous fuel
GB2613396B (en) * 2021-12-02 2024-03-20 Delphi Tech Ip Ltd Fuel injector suitable for gaseous fuel

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DE102004004169A1 (en) 2005-08-18

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