EP1481157B1 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

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Publication number
EP1481157B1
EP1481157B1 EP02795039A EP02795039A EP1481157B1 EP 1481157 B1 EP1481157 B1 EP 1481157B1 EP 02795039 A EP02795039 A EP 02795039A EP 02795039 A EP02795039 A EP 02795039A EP 1481157 B1 EP1481157 B1 EP 1481157B1
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EP
European Patent Office
Prior art keywords
intermediate ring
fuel injection
armature
injection valve
fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02795039A
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German (de)
French (fr)
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EP1481157A1 (en
Inventor
Klaus Noller
Martin Buehner
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP1481157A1 publication Critical patent/EP1481157A1/en
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    • 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
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering

Definitions

  • the invention is based on a fuel injection valve according to the preamble of the main claim.
  • a disadvantage is in particular the complex design with an additional component. Also, the large area Elastomer ring unfavorable for the course of the magnetic field and complicates the closing of the field lines and thus the Achieving high tightening forces during the opening movement of the Fuel injector.
  • a fuel injection valve according to the preamble of claim 1 is described in document DE 199 50761 A.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the armature against the Intermediate ring and the damping element against rotation is arranged without further components are needed. The other functions such as debouncing the anchor and the valve needle and the discharge of fuel from the Sealing element remain unaffected.
  • the intermediate ring is advantageously in one Recess, which in a drain-side end of the Anchor is formed.
  • a variant provides, the anchor and the Intermediate ring in a simple and cost-effective manner Weld directly to each other.
  • Another advantage is that the interlocking or interconnected components anchor and intermediate ring by the static friction which exists between the damping element and the intermediate ring prevails, against rotation on the Valve needle are arranged.
  • the fuel injection valve 1 is in the form of a Fuel injection valve 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 is connected to the valve closing body 4 in Operative connection, with a on a valve seat body. 5 arranged valve seat surface 6 to a sealing seat interacts.
  • the fuel injection valve 1 acts it is in the exemplary embodiment to an inwardly opening Fuel injection valve 1, which via a Spray opening 7 has.
  • the nozzle body 2 is through a Seal 8 against the 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 a line 19 from a via an electrical plug-in contact 17 can be supplied electrical Electricity excited.
  • 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 a Anchor 20. This is about a first flange 21st non-positively connected to the valve needle 3 in conjunction, which by a weld 22 with the first flange 21 connected is.
  • On the first flange 21 is supported Return spring 23 from which in the present design of Fuel injection valve 1 by a sleeve 24 Bias is brought.
  • Fuel channels 30a to 30c In the valve needle guide 14, in Anchor 20 and the valve seat body 5 extend Fuel channels 30a to 30c. The fuel gets over one supplied central fuel supply 16 and by a Filter element 25 filtered.
  • the fuel injection valve 1 is by a seal 28 against a not further sealed illustrated fuel line.
  • a annular damping element 32 On the discharge side of the armature 20 is a annular damping element 32, which consists of a Elastomer material consists, arranged. It lies on one second flange 31, which frictionally with the Valve needle 3 is connected.
  • 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. 2A shows in an excerpted sectional view of a enlarged view of the area IIA in Fig. 1.
  • the intermediate ring 33 is shaped or arranged that the armature 20 against rotation on the Valve needle 3 is mounted and only more axially in the frame the anchor stops, which by the first flange 21 and can be formed, the second flange 31 can move.
  • the number of edges 34 six, as shown in Fig. 2B, which is a sectional view along that in Fig. 2A with IIB-IIB indicated line shows, can be seen.
  • the intermediate ring 33 on the damping element 32 which consists of an elastomeric material, is the static friction between the intermediate ring 33 and the Damping element 32 so large that they are not can twist against each other.
  • Fig. 3 shows a second embodiment of a inventive design of the Fuel injection valve 1 in the same view as FIG. 2A. Same components are with matching Provided with reference numerals.
  • the weld 39 can extend over the entire circumference of the intermediate ring 33. It You can also apply multiple welds to individual points for example, between the fuel channels 30a, be limited.
  • the invention is not limited to those shown Embodiments limited and z. B. also for outward opening fuel injectors 1 or others Anchor shapes, such as flat anchors suitable.

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

Abstract

A fuel injector, in particular for the direct injection of fuel into the combustion chamber of an internal combustion engine, includes a valve needle, which cooperates with a valve seat surface to form a sealing seat, and an armature engaging with the valve needle. The armature is arranged on the valve needle in an axially movable manner and damped by a damping element made of an elastomer. Arranged between the armature and the damping element is an intermediate ring, and the damping element rests on a flange that is connected to the valve needle by force locking. Due to the intermediate ring, the armature is supported on the valve needle in a twist-proof manner.

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.

Es ist bereits aus der US 4,766,405 ein Brennstoffeinspritzventil bekannt, das einen mit einer Ventilnadel verbundenen Ventilschließkörper, der mit einer an einem Ventilsitzkörper ausgebildeten Ventilsitzfläche zu einem Dichtsitz zusammenwirkt, aufweist. Zur elektromagnetischen Betätigung des Brennstoffeinspritzventils ist eine Magnetspule vorgesehen, die mit einem Anker zusammenwirkt, der mit der Ventilnadel kraftschlüssig verbunden ist. Um den Anker und die Ventilnadel ist eine zusätzliche Masse zylinderförmig vorgesehen, die über eine Elastomerschicht mit dem Anker verbunden ist.It is already known from US 4,766,405 Fuel injection valve known, the one with a Valve needle connected valve closing body, with a valve seat surface formed on a valve seat body a sealing seat cooperates, has. to electromagnetic actuation of the Fuel injection valve is provided a solenoid, which interacts with an anchor, with the valve needle positively connected. To the anchor and the Valve needle is an additional mass cylindrical provided, which has an elastomeric layer with the anchor connected is.

Nachteilig ist dabei insbesondere die aufwendige Bauform mit einem zusätzlichen Bauteil. Auch ist der großflächige Elastomerring ungünstig für den Verlauf des Magnetfelds und erschwert das Schließen der Feldlinien und somit das Erreichen hoher Anzugskräfte bei der Öffnungsbewegung des Brennstoffeinspritzventils.A disadvantage is in particular the complex design with an additional component. Also, the large area Elastomer ring unfavorable for the course of the magnetic field and complicates the closing of the field lines and thus the Achieving high tightening forces during the opening movement of the Fuel injector.

Ein Brennstoffeinspritzventil gemäß dem Oberbegriff des Anspruchs 1 ist im Dokument DE 199 50761 A beschrieben. A fuel injection valve according to the preamble of claim 1 is described in document DE 199 50761 A.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Brennstoffeinspritzventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß der Anker gegenüber dem Zwischenring und dem Dämpfungselement verdrehsicher angeordnet ist, ohne daß weitere Bauteile benötigt werden. Die weiteren Funktionen wie die Entprellung des Ankers und der Ventilnadel und die Ableitung des Brennstoffs aus dem Dichtelement bleiben unbeeinflußt.The fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the armature against the Intermediate ring and the damping element against rotation is arranged without further components are needed. The other functions such as debouncing the anchor and the valve needle and the discharge of fuel from the Sealing element remain unaffected.

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.

Der Zwischenring liegt vorteilhafterweise in einer Ausnehmung, welche in einer ablaufseitigen Stirnseite des Ankers ausgebildet ist.The intermediate ring is advantageously in one Recess, which in a drain-side end of the Anchor is formed.

Durch die Ausbildung von Kanten an dem Zwischenring kann in einfacher Weise ein Eingriff des Zwischenrings in die durch die Ausnehmung angeschnittenen Brennstoffkanäle erzielt werden, so daß der Zwischenring punktuell an den so gebildeten Ecken anliegt und sich nicht mehr gegenüber dem Anker verdrehen kann.Due to the formation of edges on the intermediate ring can in easy way, an engagement of the intermediate ring in the through achieved the recess cut fuel channels be so that the intermediate ring punctually to the so formed corners and no longer facing the Can twist anchor.

Eine Ausführungsvariante sieht vor, den Anker und den Zwischenring in einfacher und kostengünstiger Weise durch Schweißen direkt miteinander zu verbinden.A variant provides, the anchor and the Intermediate ring in a simple and cost-effective manner Weld directly to each other.

Von Vorteil ist weiterhin, daß die ineinandergreifenden oder miteinander verbundenen Bauteile Anker und Zwischenring durch die Haftreibung, welche zwischen dem Dämpfungselement und dem Zwischenring herrscht, verdrehsicher an der Ventilnadel angeordnet sind. Another advantage is that the interlocking or interconnected components anchor and intermediate ring by the static friction which exists between the damping element and the intermediate ring prevails, against rotation on the Valve needle are arranged.

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 Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils,
Fig. 2A
einen schematischen Längsschnitt durch das erfindungsgemäße Brennstoffeinspritzventil im Bereich IIA in Fig. 1,
Fig. 2B
einen schematischen Schnitt entlang der Linie IIB-IIB in Fig. 2A, und
Fig. 3
einen schematischen Längsschnitt durch ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils im Bereich IIA in Fig. 1.
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
a schematic section through an embodiment of an inventively designed fuel injector,
Fig. 2A
3 shows a schematic longitudinal section through the fuel injection valve according to the invention in the area IIA in FIG. 1,
Fig. 2B
a schematic section along the line IIB-IIB in Fig. 2A, and
Fig. 3
a schematic longitudinal section through a further embodiment of a fuel injection valve according to the invention in the area IIA in Fig. 1st

Beschreibung der AusführungsbeispieleDescription of the embodiments

Bevor anhand der Figuren 2A, 2B und 3 Ausführungsbeispiele eines erfindungsgemäßen Brennstoffeinspritzventils 1 näher beschrieben werden, soll zum besseren Verständnis der Erfindung zunächst anhand von Fig. 1 ein Brennstoffeinspritzventil bezüglich seiner wesentlichen Bauteile kurz erläutert werden.Before with reference to Figures 2A, 2B and 3 embodiments a fuel injection valve 1 according to the invention closer should be described for better understanding of Invention first with reference to FIG. 1 a Fuel injector with respect to its essential Components are explained briefly.

Das Brennstoffeinspritzventil 1 ist in der Form eines Brennstoffeinspritzventils 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. The fuel injection valve 1 is in the form of a Fuel injection valve 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 steht mit dem Ventilschließkörper 4 in Wirkverbindung, 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 den 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 injection valve 1 consists of a Nozzle body 2, in which a valve needle 3 is arranged. The valve needle 3 is connected to the valve closing body 4 in Operative connection, with a on a valve seat body. 5 arranged valve seat surface 6 to a sealing seat interacts. When the fuel injection valve 1 acts it is in the exemplary embodiment to an inwardly opening Fuel injection valve 1, which via a Spray opening 7 has. The nozzle body 2 is through a Seal 8 against the 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 through a constriction 26th separated from each other and not by one another ferromagnetic connecting member 29 connected. The Solenoid 10 is connected via a line 19 from a via an electrical plug-in contact 17 can be supplied electrical Electricity excited. 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 ein 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 30c. 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 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 a Anchor 20. This is about a first flange 21st non-positively connected to the valve needle 3 in conjunction, which by a weld 22 with the first flange 21 connected is. On the first flange 21 is supported Return spring 23 from which in the present design of Fuel injection valve 1 by a sleeve 24 Bias is brought. In the valve needle guide 14, in Anchor 20 and the valve seat body 5 extend Fuel channels 30a to 30c. The fuel gets over one supplied central fuel supply 16 and by a Filter element 25 filtered. The fuel injection valve 1 is by a seal 28 against a not further sealed illustrated fuel line.

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 kraftschlüssig mit der Ventilnadel 3 verbunden ist. Erfindungsgemäß weist das Brennstoffeinspritzventil 1 zwischen dem Dämpfungselement 32 und dem Anker 20 einen Zwischenring 33 auf, welcher so ausgebildet und angeordnet ist, daß ein Verdrehen des Ankers 20 während des Betriebs des Brennstoffeinspritzventils 1 unterbunden wird. Eine detaillierte Darstellung und Beschreibung der erfindungsgemäßen Maßnahmen ist den Fig. 2A und 2B sowie Fig. 3 zu entnehmen.On the discharge side of the armature 20 is a annular damping element 32, which consists of a Elastomer material consists, arranged. It lies on one second flange 31, which frictionally with the Valve needle 3 is connected. According to the invention that Fuel injection valve 1 between the damping element 32nd and the armature 20 on an intermediate ring 33, which is so is formed and arranged that a rotation of the armature 20 during operation of the fuel injection valve 1 is prevented. A detailed presentation and Description of the measures according to the invention is shown in FIG. 2A and 2B and FIG. 3.

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 Abspritzöffnung 7 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 is held in sealing engagement with the valve seat 6. at Excitation of the magnetic coil 10 builds this a magnetic field, which the armature 20 against the spring force of Return spring 23 moves in the stroke direction, wherein the stroke through one in the rest position between the inner pole 12 and the Anchor 20 working gap 27 is given. Of the Anchor 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 fuel is sprayed through the ejection opening 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 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. 2A zeigt in einer auszugsweisen Schnittdarstellung eine vergrößerte Ansicht des Bereichs IIA in Fig. 1.Fig. 2A shows in an excerpted sectional view of a enlarged view of the area IIA in Fig. 1.

Dargestellt ist ein Teil der Ventilnadel 3, der damit verschweißte zweite Flansch 31 sowie der untere Teil des Ankers 20 mit dem darin verlaufenden Brennstoffkanal 30a. Auf dem zweiten Flansch 31 liegt das Dämpfungselement 32 auf. Erfindungsgemäß weist das in Fig. 2A dargestellte erste Ausführungsbeispiel einen Zwischenring 33 auf, welcher zwischen einer ablaufseitigen Ankerfläche 35 und dem Dämpfungselement 32 angeordnet ist.Shown is a part of the valve needle 3, the so welded second flange 31 and the lower part of Anchor 20 with the fuel channel 30a extending therein. On the second flange 31, the damping element 32 is located on. According to the invention, the first shown in Fig. 2A Embodiment, an intermediate ring 33, which between a drain-side anchor surface 35 and the Damping element 32 is arranged.

Bedingt durch die geringe Haftreibung zwischen dem metallischen Anker 20 und dem ebenfalls metallischen Zwischenring 33 könnte sich der Anker 20 ohne die erfindungsgemäßen Maßnahmen unkontrolliert während des Betriebs des Brennstoffeinspritzventils 1 verdrehen. Durch die Rotationen treten mit der Zeit Abnutzungserscheinungen auf, welche zu einer Veränderung des Hubweges des Ankers 20, des Hubs der Ventilnadel 3 oder sogar zum Verklemmen des Ankers 20 mit nachfolgenden Funktionsstörungen des Brennstoffeinspritzventils 1 führen können.Due to the low static friction between the metallic anchor 20 and the likewise metallic Intermediate ring 33 could be the armature 20 without the inventive measures uncontrolled during the Turn operation of the fuel injection valve 1. By The rotations will wear over time which leads to a change in the stroke of the armature 20, the stroke of the valve needle 3 or even to jam the Ankers 20 with subsequent malfunctions of Fuel injector 1 can lead.

Erfindungsgemäß ist daher der Zwischenring 33 so geformt bzw. angeordnet, daß der Anker 20 verdrehsicher auf der Ventilnadel 3 gelagert ist und sich nur mehr axial im Rahmen der Ankeranschläge, welche durch den ersten Flansch 21 und den zweiten Flansch 31 gebildet werden, bewegen kann.According to the invention, therefore, the intermediate ring 33 is shaped or arranged that the armature 20 against rotation on the Valve needle 3 is mounted and only more axially in the frame the anchor stops, which by the first flange 21 and can be formed, the second flange 31 can move.

Dabei weist der Zwischenring 33 bei dem in Fig. 2A und 2B dargestellten Ausführungsbeispiel eine mehrkantige Form auf, welche durch das Entfernen von Segmenten aus dem ursprünglich runden Zwischenring 33 hervorgeht. Im vorliegenden ersten Ausführungsbeispiel beträgt die Anzahl von Kanten 34 sechs, wie aus Fig. 2B, welche eine geschnittene Darstellung entlang der in Fig. 2A mit IIB-IIB bezeichneten Linie zeigt, ersichtlich ist. In this case, the intermediate ring 33 in the in Figs. 2A and 2B illustrated embodiment on a polygonal shape, which by removing segments from the originally round intermediate ring 33 is apparent. in the present first embodiment, the number of edges 34 six, as shown in Fig. 2B, which is a sectional view along that in Fig. 2A with IIB-IIB indicated line shows, can be seen.

Um das Verdrehen des Ankers 20 gegenüber dem Zwischenring 33 zu verhindern, ist es weiterhin notwendig, diesen in den Anker 20 in eine Ausnehmung 35 einzutiefen. Diese ist in Fig. 2A in einer abströmseitigen Stirnseite 36 des Ankers 20 erkennbar. Dabei ist der Durchmesser der Ausnehmung 35 etwas kleiner als der ursprüngliche Durchmesser des Zwischenrings 33 vor der Anbringung der Kanten 34. Dadurch werden die in dem Anker 20 ausgebildeten Brennstoffkanäle 30a angeschnitten, so daß Eckpunkte 37 gebildet werden, an welchen die Kanten 34 des Zwischenrings 33 punktuell anliegen. Dadurch, daß je eine Ecke 38 des Zwischenrings 33 in einen solchermaßen angeschnittenen Brennstoffkanal 30a eingreift, kann sich der Zwischenring 33 gegenüber dem Anker 20 nicht verdrehen.To the rotation of the armature 20 relative to the intermediate ring 33rd It is still necessary to prevent this in the Anchor 20 into a recess 35. This is in Fig. 2A in a downstream end face 36 of the armature 20th recognizable. The diameter of the recess 35 is something smaller than the original diameter of the intermediate ring 33 before attaching the edges 34. This will be the in the armature 20 formed fuel channels 30a cut so that vertices 37 are formed on which the edges 34 of the intermediate ring 33 punctually issue. Characterized in that one corner 38 of the intermediate ring 33rd in a thus-cut fuel channel 30a engages, the intermediate ring 33 opposite the armature 20 do not twist.

Da der Zwischenring 33 andererseits an dem Dämpfungselement 32 anliegt, welches aus einem Elastomerwerkstoff besteht, ist die Haftreibung zwischen dem Zwischenring 33 und dem Dämpfungselement 32 so groß, daß sich diese nicht gegeneinander verdrehen können.On the other hand, because of the intermediate ring 33 on the damping element 32 is applied, which consists of an elastomeric material, is the static friction between the intermediate ring 33 and the Damping element 32 so large that they are not can twist against each other.

Fig. 3 zeigt ein zweites Ausführungsbeispiel einer erfindungsgemäßen Ausgestaltung des Brennstoffeinspritzventils 1 in gleicher Ansicht wie Fig. 2A. Gleiche Bauteile sind dabei mit übereinstimmenden Bezugszeichen versehen.Fig. 3 shows a second embodiment of a inventive design of the Fuel injection valve 1 in the same view as FIG. 2A. Same components are with matching Provided with reference numerals.

Im Gegensatz zu dem in den Fig. 2A und 2B dargestellten ersten Ausführungsbeispiel wird die Verdrehfixierung des Ankers 20 gegenüber dem Zwischenring 33 im vorliegenden zweiten Ausführungsbeispiel durch zumindest eine Schweißstelle 39, vorzugsweise eine umlaufende Schweißnaht, erzielt. Dies hat den Vorteil einer einfachen und kostengünstigen Herstellung. Die Schweißstelle 39 kann dabei über den gesamten Umfang des Zwischenrings 33 verlaufen. Es können auch mehrere Schweißstellen auf einzelne Punkte, beispielsweise zwischen den Brennstoffkanälen 30a, beschränkt sein. In contrast to that shown in Figs. 2A and 2B First embodiment, the Verdrehfixierung of Armature 20 relative to the intermediate ring 33 in the present second embodiment by at least one Weld 39, preferably a circumferential weld, achieved. This has the advantage of a simple and cost-effective production. The weld 39 can extend over the entire circumference of the intermediate ring 33. It You can also apply multiple welds to individual points for example, between the fuel channels 30a, be limited.

Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt und z. B. auch für nach außen öffnende Brennstoffeinspritzventile 1 oder andere Ankerformen, beispielsweise Flachanker, geeignet.The invention is not limited to those shown Embodiments limited and z. B. also for outward opening fuel injectors 1 or others Anchor shapes, such as flat anchors suitable.

Claims (9)

  1. Fuel injection valve (1), in particular for the direct injection of fuel into the combustion chamber of an internal combustion engine, with a valve needle (3), which interacts with a valve seat surface (6) to form a sealing seat, and with an armature (20) acting on the valve needle (3), the armature (20) being axially movable on the valve needle (3) and damped by a damping element (32) consisting of an elastomer, the damping element (32) resting on a flange (31) which is non-positively connected to the valve needle (3), and an intermediate ring (33) being arranged between the armature (20) and the damping element (32), characterized in that the armature (20) is mounted on the valve needle (3) in a twist-proof manner by the intermediate ring (33).
  2. Fuel injection valve according to Claim 1, characterized in that the intermediate ring (33) has a polygonal form.
  3. Fuel injection valve according to Claim 2, characterized in that the number of edges (34) of the intermediate ring (33) is equal to the number of fuel channels (30a) in the armature (20).
  4. Fuel injection valve according to Claim 3, characterized in that the number of edges (34) is six.
  5. Fuel injection valve according to Claim 2, characterized in that the polygonal intermediate ring (33) is arranged at least partly in a recess (35) in an end face (36) on the downstream side of the armature (20).
  6. Fuel injection valve according to Claim 5, characterized in that the polygonal intermediate ring (33) engages with its corners (38) formed by the edges (34) in the fuel channels (30a) cut into by the recess (35).
  7. Fuel injection valve according to Claim 6, characterized in that the cut-into fuel channels (30a) bear with corner points (37) against the edges (34) of the intermediate ring (33).
  8. Fuel injection valve according to Claim 1, characterized in that the intermediate ring (33) is connected to the armature (20) by means of at least one welding location (39).
  9. Fuel injection valve according to one of Claims 1 to 8, characterized in that the intermediate ring (33) is held on the damping element (32) in a twist-proof manner by means of static friction.
EP02795039A 2002-02-26 2002-12-23 Fuel injection valve Expired - Lifetime EP1481157B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10208224A DE10208224A1 (en) 2002-02-26 2002-02-26 Fuel injector
DE10208224 2002-02-26
PCT/DE2002/004732 WO2003072928A1 (en) 2002-02-26 2002-12-23 Fuel injection valve

Publications (2)

Publication Number Publication Date
EP1481157A1 EP1481157A1 (en) 2004-12-01
EP1481157B1 true EP1481157B1 (en) 2005-08-24

Family

ID=27740426

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Application Number Title Priority Date Filing Date
EP02795039A Expired - Lifetime EP1481157B1 (en) 2002-02-26 2002-12-23 Fuel injection valve

Country Status (7)

Country Link
US (1) US7007870B2 (en)
EP (1) EP1481157B1 (en)
JP (1) JP4276954B2 (en)
KR (1) KR20040086443A (en)
AT (1) ATE302902T1 (en)
DE (2) DE10208224A1 (en)
WO (1) WO2003072928A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20030090A1 (en) 2003-02-21 2004-08-22 Magneti Marelli Powertrain Spa FUEL INJECTOR FOR AN INTERNAL COMBUSTION ENGINE.
DE102010021118A1 (en) * 2010-04-15 2011-10-20 Micro-Epsilon Messtechnik Gmbh & Co. Kg sensor
EP2851551B1 (en) * 2013-09-20 2016-05-25 Continental Automotive GmbH Fluid injection valve
WO2017207268A1 (en) * 2016-06-02 2017-12-07 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
DE102017207273A1 (en) 2016-06-30 2018-01-04 Robert Bosch Gmbh Valve for metering a fluid
US10119507B1 (en) * 2017-07-17 2018-11-06 GM Global Technology Operations LLC Rotating fuel injector assembly
DE102017222501A1 (en) * 2017-12-12 2019-06-13 Robert Bosch Gmbh Valve for metering a fluid
WO2022251503A1 (en) 2021-05-28 2022-12-01 Stanadyne Llc Fuel injector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4766405A (en) 1987-04-14 1988-08-23 Allied Corporation Dynamic energy absorber
DE19950761A1 (en) 1999-10-21 2001-04-26 Bosch Gmbh Robert Fuel injection valve has supporting ring between elastomeric ring and armature that supports elastomeric ring axially near opening of fuel channel in armature and radially on shoulder
DE10039078A1 (en) 2000-08-10 2002-02-21 Bosch Gmbh Robert Fuel injector
DE10118162B9 (en) 2001-04-11 2004-09-09 Robert Bosch Gmbh Fuel injector
DE10124743A1 (en) 2001-05-21 2002-11-28 Bosch Gmbh Robert Fuel injection valve for an internal combustion engine comprises an armature having an armature buffer sleeve inserted in a form-locking manner into an inner recess of an armature casing

Also Published As

Publication number Publication date
US7007870B2 (en) 2006-03-07
ATE302902T1 (en) 2005-09-15
DE10208224A1 (en) 2003-09-11
DE50204045D1 (en) 2005-09-29
JP4276954B2 (en) 2009-06-10
US20040155124A1 (en) 2004-08-12
KR20040086443A (en) 2004-10-08
WO2003072928A1 (en) 2003-09-04
EP1481157A1 (en) 2004-12-01
JP2005518497A (en) 2005-06-23

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