EP1358404B1 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

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Publication number
EP1358404B1
EP1358404B1 EP02704618A EP02704618A EP1358404B1 EP 1358404 B1 EP1358404 B1 EP 1358404B1 EP 02704618 A EP02704618 A EP 02704618A EP 02704618 A EP02704618 A EP 02704618A EP 1358404 B1 EP1358404 B1 EP 1358404B1
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EP
European Patent Office
Prior art keywords
fuel injection
injection valve
fuel
adapter
valve according
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
EP02704618A
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German (de)
French (fr)
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EP1358404A1 (en
Inventor
Ferdinand Reiter
Ottmar Martin
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP1358404A1 publication Critical patent/EP1358404A1/en
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Publication of EP1358404B1 publication Critical patent/EP1358404B1/en
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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/045—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the combustion chamber
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

Definitions

  • the invention is based on a fuel injection valve according to the preamble of claim 1.
  • Fuel injection valves is a valve tube as Basic body of the fuel injection valve of three parts educated.
  • a core and a valve seat carrier are about one non-magnetic intermediate piece hydraulically tight with each other connected, wherein at least two joining and Connection points are necessary.
  • From DE 195 03 821 A1 is a fuel injection valve known in which the number of components of the valve tube is reduced, so that the number of connection and Joint is reduced.
  • the entire valve tube is off made of magnetically conductive material, so that on Magnetically non-conductive spacers are dispensed with can.
  • a disadvantage of the known from DE 195 03 821 A1 Fuel injection valve is that the housing shape this fuel injector for some applications in the direct fuel injection is not suitable because they is too short in view of the existing installation situation and not sufficiently sealed against the engine compartment.
  • EP-A-0 781 916 a Fuel injection valve for supplying fuel an internal combustion engine is known, which is connected to a inlet-side cylindrical portion of an inner pole an extension sleeve having an inner comprising a tubular part for the fuel supply, which is formed by an outer housing. Through the inner tubular part, the fuel is supplied while the electrical contact for contacting the magnetic coil is formed on the outside of the molded housing.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the individual lines, the electrical supply as well as the supply with Secure fuel in a fuel injector extending adapter are guided so that the unit as Total component against the pressure in the intake manifold and / or in Combustion chamber is sealed. This also makes it easier the installation, since the supply lines more accessible and all are arranged in one place.
  • Another advantage is that the adapter of two easy producible tubular, nestable hollow body is constructed.
  • Another advantage is that the adapter before the Welding on the fuel injector positive fit can be plugged, what the final assembly facilitated.
  • Fig. 1 shows in a fragmentary, schematic Sectional view a longitudinal section through a Embodiment of an inventively designed Fuel injection valve 1.
  • 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 comprises a nozzle body 2, in which a valve needle 3 is arranged.
  • the Valve needle 3 is connected to a 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 nozzle body 2 is by a seal 8 against the outer pole 9 of a Magnetic circuit sealed.
  • a solenoid 10 is in one Coil housing 11 encapsulated and on a bobbin 12th wound, which at an inner pole 13 of the magnetic circuit is applied.
  • the inner pole 13 and the outer pole 9 are connected by a Split 26 separated from each other and rely on a Connecting component 29 from.
  • the magnetic coil 10 is connected via a Line 19 of a via an electrical plug contact 17th energized electric current.
  • the line 19 is according to the invention in an adapter 18, which has a inlet end 34 of the fuel injection valve. 1 plugged and with the fuel injector 1 in the area the magnetic coil 10 is preferably welded, arranged.
  • the line 19 is preferably via a connector 41st electrically connected to the magnetic coil 10.
  • the fuel is supplied via a central fuel supply 16, in a guided parallel to the line 19 recess 36 of the adapter 18 is formed, supplied and in inflow-side end 34 of the fuel injection valve 1 filtered by a filter element 25.
  • the Fuel injection valve 1 is through a first seal 28th against a cylinder head not shown as well by a second seal 37 against one also not sealed sealed fuel line.
  • the adapter 18 consists of two in one another tubular hollow bodies 42 and 43, wherein the inner Hollow body 42 'the fuel from the not shown Fuel line from the central fuel supply 16 to Filter element 25 leads, while the outer hollow body 43 the Line 19 and the inner hollow body 42 receives.
  • 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.
  • the inlet side of the sealing seat is a guide plate 35th designed for a central orientation of the Valve needle 3 ensures and thus tilting the Valve needle 3 and subsequent inaccuracies in the counteracts metered amount of fuel.
  • a guide plate 35th designed for a central orientation of the Valve needle 3 ensures and thus tilting the Valve needle 3 and subsequent inaccuracies in the counteracts metered amount of fuel.
  • 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 operatively connected 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.
  • the sealing of the adapter 18 against the pressure of the Combustion chamber or the intake manifold takes place during assembly of the fuel injection valve 1 to three different Species.
  • the from the nozzle body 2 and the Outside pole 9 of the magnetic coil 10 formed housing of the Fuel injection valve 1 assembled and means the interposed seal 8 against the outer Pressure sealed.
  • the connection between the coil housing 11 and the inner pole 9 is preferably carried out by welding, as well as the connection between the coil housing 11 and the adapter 18.
  • the coil housing 11 may be integrally formed with the adapter 18, so that a Joint less occurs.
  • the seals 8, 28 and 37 are preferably as O-rings executed, the cost-effective and resistant to influences as heat or solution behavior of the fuel produced are.
  • One between the inner hollow body 42 and the outer hollow body 43 formed recess 45 and other occurring column 40 are filled with a sealant 39 filled and thus also sealed.
  • Fig. 2 shows in a further, only partially cut schematic view of the inventively designed Fuel injection valve 1.
  • the invention is not limited to those shown Embodiments limited and z. B. also for Fuel injection valves 1 with magnetostrictive or piezoelectric actuators 10 and any types of Fuel injectors 1 applicable.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Anspruchs 1.The invention is based on a fuel injection valve according to the preamble of claim 1.

Bei bekannten elektromagnetisch betätigbaren Brennstoffeinspritzventilen ist ein Ventilrohr als Grundkörper des Brennstoffeinspritzventils aus drei Teilen gebildet. Ein Kern und ein Ventilsitzträger sind über ein unmagnetisches Zwischenstück hydraulisch dicht miteinander verbunden, wobei mindestens zwei Füge- und Verbindungsstellen notwendig sind.In known electromagnetically actuated Fuel injection valves is a valve tube as Basic body of the fuel injection valve of three parts educated. A core and a valve seat carrier are about one non-magnetic intermediate piece hydraulically tight with each other connected, wherein at least two joining and Connection points are necessary.

Aus der DE 195 03 821 A1 ist ein Brennstoffeinspritzventil bekannt, bei dem die Anzahl der Bauteile des Ventilrohrs verringert ist, so daß auch die Anzahl der Verbindungs- und Fügestellen reduziert ist. Das gesamte Ventilrohr ist aus magnetisch leitendem Material hergestellt, so daß auf magnetisch nicht leitende Zwischenstücke verzichtet werden kann.From DE 195 03 821 A1 is a fuel injection valve known in which the number of components of the valve tube is reduced, so that the number of connection and Joint is reduced. The entire valve tube is off made of magnetically conductive material, so that on Magnetically non-conductive spacers are dispensed with can.

Nachteilig an dem aus der DE 195 03 821 A1 bekannten Brennstoffeinspritzventil ist, daß sich die Gehäuseform dieses Brennstoffeinspritzventils für einige Anwendungsfälle bei der direkten Brennstoffeinspritzung nicht eignet, da sie im Hinblick auf die vorhandene Einbausituation zu kurz ist und nicht gegen den Motorraum genügend abgedichtet ist. A disadvantage of the known from DE 195 03 821 A1 Fuel injection valve is that the housing shape this fuel injector for some applications in the direct fuel injection is not suitable because they is too short in view of the existing installation situation and not sufficiently sealed against the engine compartment.

Weiterhin ist aus der EP-A-0 781 916 ein Brennstoffeinspritzventil zur Zufuhr von Brennstoff an eine Brennkraftmaschine bekannt, welches an einem zulaufseitigen zylindrischen Abschnitt eines Innenpols eine Verlängerungshülse aufweist, welche einen inneren rohrförmigen Teil für die Brennstoffzufuhr umfaßt, welcher durch ein äußeres Gehäuse umformt ist. Durch das innere rohrförmige Teil wird der Brennstoff zugeführt, während der elektrische Kontakt zur Kontaktierung der Magnetspule außen an dem überformten Gehäuse angeformt ist.Furthermore, from EP-A-0 781 916 a Fuel injection valve for supplying fuel an internal combustion engine is known, which is connected to a inlet-side cylindrical portion of an inner pole an extension sleeve having an inner comprising a tubular part for the fuel supply, which is formed by an outer housing. Through the inner tubular part, the fuel is supplied while the electrical contact for contacting the magnetic coil is formed on the outside of the molded housing.

Nachteilig an dem aus der EP-A-0 781 916 bekannten Brennstoffeinspritzventil ist dabei, dass die Umspritzung des Brennstoffeinspritzventils zum Schutz des rohrförmigen Teils sowie der angeformte Anschluß für die elektrische Leitung in der Herstellung aufwendig und daher teuer sind. Der außen angeformte Anschlußstecker ist zudem bei beengten Einbaulagen problematisch. A disadvantage of the known from EP-A-0 781 916 Fuel injector is doing that the encapsulation the fuel injection valve for protecting the tubular Part and the molded connection for the electrical Lead in the production consuming and therefore expensive. The externally molded connector is also included cramped mounting positions problematic.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Brennstoffeinspritzventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß die einzelnen Leitungen, die die elektrische Versorgung sowie die Versorgung mit Brennstoff sichern, in einem das Brennstoffeinspritzventil verlängernden Adapter so geführt sind, daß die Einheit als Gesamtbauteil gegen den Druck im Saugrohr und/oder im Brennraum abgedichtet ist. Dadurch erleichtert sich außerdem der Einbau, da die Zuleitungen leichter zugänglich und alle an einer Stelle angeordnet sind.The fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the individual lines, the the electrical supply as well as the supply with Secure fuel in a fuel injector extending adapter are guided so that the unit as Total component against the pressure in the intake manifold and / or in Combustion chamber is sealed. This also makes it easier the installation, since the supply lines more accessible and all are arranged in one place.

Erfindungsgemäß ist die Brennstoffzufuhr in dem einen Hohlkörper, die elektrische Leitung in einer zwischen dem einen und dem anderen Hohlkörper ausgebildeten Ausnehmung vorgesehen, wodurch die elektrische Leitung einfach und geschützt gegen Beschädigungen verlegbar ist.According to the invention, the fuel supply in the one Hollow body, the electric wire in one between the one and the other hollow body trained recess provided, whereby the electrical line easy and protected against damage can be laid.

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

Von Vorteil ist auch, daß der Adapter aus zwei einfach herstellbaren rohrförmigen, ineinandersteckbaren Hohlkörpers aufgebaut ist.Another advantage is that the adapter of two easy producible tubular, nestable hollow body is constructed.

Von Vorteil ist außerdem, daß der Adapter vor der Verschweißung auf das Brennstoffeinspritzventil formschlüssig aufsteckbar ist, was die Endmontage erleichtert.Another advantage is that the adapter before the Welding on the fuel injector positive fit can be plugged, what the final assembly facilitated.

Ebenso ist von Vorteil, daß beliebige Brennstoffeinspritzventile mit dem erfindungsgemäßen Adapter versehen werden können. It is also advantageous that any Fuel injection valves with the adapter according to the invention can be provided.

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 Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils, und
Fig. 2
einen schematischen Teilschnitt durch das erfindungsgemäße Brennstoffeinspritzventil.
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 embodiment of an inventively designed fuel injector, and
Fig. 2
a schematic partial section through the fuel injection valve according to the invention.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Fig. 1 zeigt in einer ausschnittsweisen, schematisierten Schnittdarstellung einen Längsschnitt durch ein Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils 1.Fig. 1 shows in a fragmentary, schematic Sectional view a longitudinal section through a Embodiment of an inventively designed Fuel injection valve 1.

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 umfaßt einen Düsenkörper 2, in welchem eine Ventilnadel 3 angeordnet ist. Die Ventilnadel 3 steht mit einem 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 bevorzugten Ausführungsbeispiel um ein nach innen öffnendes Brennstoffeinspritzventil 1, welches über mindestens eine Abspritzöffnung 7 verfügt. Der Düsenkörper 2 ist durch eine Dichtung 8 gegen den Außenpol 9 eines Magnetkreises abgedichtet. Eine Magnetspule 10 ist in einem Spulengehäuse 11 gekapselt und auf einen Spulenträger 12 gewickelt, welcher an einem Innenpol 13 des Magnetkreises anliegt. Der Innenpol 13 und der Außenpol 9 sind durch einen Spalt 26 voneinander getrennt und stützen sich auf einem Verbindungsbauteil 29 ab. Die Magnetspule 10 wird über eine Leitung 19 von einem über einen elektrischen Steckkontakt 17 zuführbaren elektrischen Strom erregt. Die Leitung 19 ist dabei erfindungsgemäß in einem Adapter 18, der über ein zulaufseitiges Ende 34 des Brennstoffeinspritzventils 1 gesteckt und mit dem Brennstoffeinspritzventil 1 im Bereich der Magnetspule 10 vorzugsweise verschweißt ist, angeordnet. Die Leitung 19 ist vorzugsweise über eine Steckverbindung 41 elektrisch leitend mit der Magnetspule 10 verbunden.The fuel injection valve 1 comprises a nozzle body 2, in which a valve needle 3 is arranged. The Valve needle 3 is connected to a 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 preferred embodiment to an inward opening fuel injection valve 1, which over has at least one spray opening 7. The nozzle body 2 is by a seal 8 against the outer pole 9 of a Magnetic circuit sealed. A solenoid 10 is in one Coil housing 11 encapsulated and on a bobbin 12th wound, which at an inner pole 13 of the magnetic circuit is applied. The inner pole 13 and the outer pole 9 are connected by a Split 26 separated from each other and rely on a Connecting component 29 from. The magnetic coil 10 is connected via a Line 19 of a via an electrical plug contact 17th energized electric current. The line 19 is according to the invention in an adapter 18, which has a inlet end 34 of the fuel injection valve. 1 plugged and with the fuel injector 1 in the area the magnetic coil 10 is preferably welded, arranged. The line 19 is preferably via a connector 41st electrically connected to the magnetic coil 10.

Der Brennstoff wird über eine zentrale Brennstoffzufuhr 16, die in einer parallel zu der Leitung 19 geführten Ausnehmung 36 des Adapters 18 ausgebildet ist, zugeführt und im zulaufseitigen Ende 34 des Brennstoffeinspritzventils 1 durch ein Filterelement 25 gefiltert. Das Brennstoffeinspritzventil 1 ist durch eine erste Dichtung 28 gegen einen nicht weiter dargestellten Zylinderkopf sowie durch eine zweite Dichtung 37 gegen eine ebenfalls nicht weiter dargestellte Brennstoffleitung abgedichtet.The fuel is supplied via a central fuel supply 16, in a guided parallel to the line 19 recess 36 of the adapter 18 is formed, supplied and in inflow-side end 34 of the fuel injection valve 1 filtered by a filter element 25. The Fuel injection valve 1 is through a first seal 28th against a cylinder head not shown as well by a second seal 37 against one also not sealed sealed fuel line.

Der Adapter 18 besteht aus zwei ineinander geführten rohrförmigen Hohlkörpern 42 und 43, wobei der innere Hohlkörper 42' den Brennstoff aus der nicht dargestellten Brennstoffleitung von der zentralen Brennstoffzufuhr 16 zum Filterelement 25 führt, während der äußere Hohlkörper 43 die Leitung 19 und den inneren Hohlkörper 42 aufnimmt.The adapter 18 consists of two in one another tubular hollow bodies 42 and 43, wherein the inner Hollow body 42 'the fuel from the not shown Fuel line from the central fuel supply 16 to Filter element 25 leads, while the outer hollow body 43 the Line 19 and the inner hollow body 42 receives.

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.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.

Ein zweiter Flansch 31, welcher mit der Ventilnadel 3 über eine Schweißnaht 33 verbunden ist, dient als unterer Ankeranschlag. Ein elastischer Zwischenring 32, welcher auf dem zweiten Flansch 31 aufliegt, vermeidet Prellen beim Schließen des Brennstoffeinspritzventils 1.A second flange 31, which with the valve needle 3 via a weld 33 is connected, serves as the lower Armature stop. An elastic intermediate ring 32 which on the second flange 31 rests, avoids bouncing when Closing the fuel injection valve 1.

Zulaufseitig des Dichtsitzes ist eine Führungsscheibe 35 ausgebildet, die für eine mittige Ausrichtung der Ventilnadel 3 sorgt und somit einem Verkanten der Ventilnadel 3 und nachfolgenden Ungenauigkeiten in der zugemessenen Brennstoffmenge entgegenwirkt. In der Ventilnadelführung 14, im Anker 20 sowie in der Führungsscheibe 35 verlaufen Brennstoffkanäle 30a bis 30c.The inlet side of the sealing seat is a guide plate 35th designed for a central orientation of the Valve needle 3 ensures and thus tilting the Valve needle 3 and subsequent inaccuracies in the counteracts metered amount of fuel. In the Valve needle guide 14, in the armature 20 and in the Guide plate 35 extend fuel channels 30a to 30c.

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 Flansch 21, welcher mit der Ventilnadel 3 verschweißt ist, ebenfalls in Hubrichtung mit. Der mit der Ventilnadel 3 in Wirkverbindung stehende Ventilschließkörper 4 hebt von der Ventilsitzfläche 6 ab und der Brennstoff wird 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 flange 21, which with the valve needle 3rd is welded, also in the stroke direction with. The one with the Valve needle 3 in operative connection valve closing body 4 lifts from the valve seat 6 and the fuel is 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 Wirkverbindung stehende 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 operatively connected 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.

Die Abdichtung des Adapters 18 gegen den Druck des Brennraums bzw. des Saugrohres erfolgt während der Montage des Brennstoffeinspritzventils 1 auf drei verschiedene Arten. Zunächst wird das aus dem Düsenkörper 2 und dem Außenpol 9 der Magnetspule 10 gebildete Gehäuse des Brennstoffeinspritzventils 1 zusammengesteckt und mittels der dazwischen angeordneten Dichtung 8 gegen den äußeren Druck abgedichtet. Die Verbindung zwischen dem Spulengehäuse 11 und dem Innenpol 9 erfolgt vorzugsweise durch Schweißen, ebenso wie die Verbindung zwischen dem Spulengehäuse 11 und dem Adapter 18. Alternativ kann auch das Spulengehäuse 11 einteilig mit dem Adapter 18 ausgebildet sein, so daß eine Fügestelle weniger auftritt. Die bereits oben erwähnte Abdichtung gegen den Druck im Saugrohr und/oder in der Brennkammer erfolgt über die erste Dichtung 28, während die zweite Dichtung 37 in Verbindung mit einer Stützscheibe 38 gegen den Druck in der Brennstoffleitung abdichtet.The sealing of the adapter 18 against the pressure of the Combustion chamber or the intake manifold takes place during assembly of the fuel injection valve 1 to three different Species. First, the from the nozzle body 2 and the Outside pole 9 of the magnetic coil 10 formed housing of the Fuel injection valve 1 assembled and means the interposed seal 8 against the outer Pressure sealed. The connection between the coil housing 11 and the inner pole 9 is preferably carried out by welding, as well as the connection between the coil housing 11 and the adapter 18. Alternatively, the coil housing 11 may be integrally formed with the adapter 18, so that a Joint less occurs. The already mentioned above Sealing against the pressure in the suction pipe and / or in the Combustion chamber via the first seal 28, while the second seal 37 in conjunction with a support plate 38th seals against the pressure in the fuel line.

Die Dichtungen 8, 28 und 37 sind vorzugsweise als O-Ringe ausgeführt, die kostengünstig und beständig gegen Einflüsse wie Wärme oder Lösungsverhalten des Brennstoffs herstellbar sind. Eine zwischen dem inneren Hohlkörper 42 und dem äußeren Hohlkörper 43 ausgebildete Ausnehmung 45 sowie sonstige auftretende Spalte 40 werden mit einer Dichtmasse 39 verfüllt und damit ebenfalls abgedichtet.The seals 8, 28 and 37 are preferably as O-rings executed, the cost-effective and resistant to influences as heat or solution behavior of the fuel produced are. One between the inner hollow body 42 and the outer hollow body 43 formed recess 45 and other occurring column 40 are filled with a sealant 39 filled and thus also sealed.

Fig. 2 zeigt in einer weiteren, nur teilweise geschnittenen schematischen Ansicht das erfindungsgemäß ausgestaltete Brennstoffeinspritzventil 1.Fig. 2 shows in a further, only partially cut schematic view of the inventively designed Fuel injection valve 1.

Zur Verdeutlichung der erfindungsgemäßen Maßnahmen ist der abströmseitige Teil des Brennstoffeinspritzventils 1 ungeschnitten dargestellt. Man erkennt die miteinander verbundenen Gehäuseteile Düsenkörper 2, Außenpol 9 und Spulengehäuse 11. Zulaufseitig des Spulengehäuses 11 ist der Adapter 18 angeordnet, der teilweise geschnitten dargestellt ist. Die rechte Seite der Zeichnung zeigt den inneren Hohlkörper 42 ungeschnitten, um die einfache Aufsteckbarkeit auf das zulaufseitige Ende 34 des Brennstoffeinspritzventils 1 zu zeigen. Der äußere Hohlkörper 43, der geschnitten dargestellt ist, schließt bündig mit dem Spulengehäuse 11 ab, wobei an der Seite der Steckverbindung 41 ein Absatz 44 vorgesehen ist, um die Steckverbindung 41 von außen zugänglich zu halten. Die Ausnehmung 36 zwischen dem inneren Hohlkörper 42 und dem äußeren Hohlkörper 43 sowie die davon ausgehenden Spalte 40 sind mit Dichtmasse 39 verfüllt, wodurch eine einfach zu realisierende Abdichtung insbesondere im kritischen Bereich der Brennstoffzuleitung und der elektrischen Kontaktierung erfolgen kann.To illustrate the inventive measures is the downstream part of the fuel injection valve. 1 shown uncut. You recognize each other associated housing parts nozzle body 2, outer pole 9 and Coil housing 11. inlet side of the coil housing 11 is the Adapters arranged 18, shown partially cut is. The right side of the drawing shows the inner one Hollow body 42 uncut to the simple Aufsteckbarkeit to the inlet end 34 of the fuel injection valve 1 to show. The outer hollow body 43, the cut is shown, flush with the coil housing 11th from, wherein on the side of the connector 41 a paragraph 44th is provided to the connector 41 from the outside to keep accessible. The recess 36 between the inner Hollow body 42 and the outer hollow body 43 and the thereof outgoing column 40 are filled with sealant 39, creating an easy-to-implement seal especially in the critical area of the fuel supply line and the electrical contact can be made.

Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt und z. B. auch für Brennstoffeinspritzventile 1 mit magnetostriktiven oder piezoelektrischen Aktoren 10 und beliebige Bauformen von Brennstoffeinspritzventilen 1 anwendbar.The invention is not limited to those shown Embodiments limited and z. B. also for Fuel injection valves 1 with magnetostrictive or piezoelectric actuators 10 and any types of Fuel injectors 1 applicable.

Claims (9)

  1. Fuel injection valve (1), especially for the direct injection of fuel into a combustion space of a mixture-compressing spark-ignition internal combustion engine, with a nozzle body (2) which with an external pole (9) forms a housing body, with an actuator (10) which is excitable electrically via a line (19) and a plug contact (17), and with a central fuel supply (16), the line (19) and the fuel supply (16) being arranged jointly in an adapter (18) which is capable of being plugged onto an inflow-side end (34) of a housing body and of being connected to the latter, and the adapter (18) being composed of two hollow bodies (42, 43), characterized in that the line (19) is arranged in a recess (45) formed between an inner hollow body (42) and an outer hollow body (43).
  2. Fuel injection valve according to Claim 1, characterized in that the hollow bodies (42, 43) of the adapter (18) are of tubular design.
  3. Fuel injection valve according to Claim 1 or 2, characterized in that the inner hollow body (42) is arranged in the recess (45) of the outer hollow body (43).
  4. Fuel injection valve according to one of Claims 1 to 3, characterized in that the fuel is supplied through a recess (36) in the inner hollow body (42).
  5. Fuel injection valve according to one of Claims 1 to 4, characterized in that the adapter (18) is welded together with the housing body formed from the nozzle body (2), from the external pole (9) and from a coil housing (11) of a magnet coil (10).
  6. Fuel injection valve according to one of Claims 1 to 5, characterized in that the recess (45) is filled with a sealing compound (39) for sealing-off.
  7. Fuel injection valve according to one of Claims 1 to 6, characterized in that the adapter (18) is sealed off by means of a first seal (28).
  8. Fuel injection valve according to one of Claims 1 to 7, characterized in that the adapter (18) is sealed off relative to a fuel line by means of a second seal (37).
  9. Fuel injection valve according to Claims 7 and 8, characterized in that the first seal (28) and the second seal (37) are designed as O-rings.
EP02704618A 2001-01-30 2002-01-28 Fuel injection valve Expired - Lifetime EP1358404B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10103932A DE10103932B4 (en) 2001-01-30 2001-01-30 Fuel injector
DE10103932 2001-01-30
PCT/DE2002/000296 WO2002061270A1 (en) 2001-01-30 2002-01-28 Fuel injection valve

Publications (2)

Publication Number Publication Date
EP1358404A1 EP1358404A1 (en) 2003-11-05
EP1358404B1 true EP1358404B1 (en) 2005-06-15

Family

ID=7672093

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Application Number Title Priority Date Filing Date
EP02704618A Expired - Lifetime EP1358404B1 (en) 2001-01-30 2002-01-28 Fuel injection valve

Country Status (5)

Country Link
US (1) US6896210B2 (en)
EP (1) EP1358404B1 (en)
JP (1) JP2004518067A (en)
DE (2) DE10103932B4 (en)
WO (1) WO2002061270A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009000184A1 (en) 2009-01-13 2010-07-15 Robert Bosch Gmbh Fuel injector

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3010612A1 (en) * 1980-03-20 1981-10-01 Robert Bosch Gmbh, 7000 Stuttgart ELECTROMAGNETICALLY ACTUABLE VALVE
GB9014334D0 (en) * 1990-06-27 1990-08-15 Lucas Ind Plc Fuel injector
NZ259280A (en) * 1992-12-21 1996-12-20 Transcom Gas Tech Fluid injector having inner sliding hollow valve stem with flange forming armature of solenoid actuator
IT232490Y1 (en) * 1994-07-01 2000-01-10 Elasis Sistema Ricerca Fiat BLOCK TRAVEL ADJUSTMENT DEVICE FOR A FUEL INJECTOR
DE19503821A1 (en) * 1995-02-06 1996-08-08 Bosch Gmbh Robert Electromagnetically actuated valve
US5755386A (en) * 1995-12-26 1998-05-26 General Motors Corporation Fuel injector deep drawn valve guide
DE19626576A1 (en) * 1996-07-02 1998-01-08 Bosch Gmbh Robert Fuel injection valve for internal combustion engine
DE19712591A1 (en) * 1997-03-26 1998-10-01 Bosch Gmbh Robert Fuel injector and method for manufacturing and using a fuel injector
DE19736682A1 (en) * 1997-08-22 1999-02-25 Bosch Gmbh Robert Fuel injector for internal combustion engine
DE19855568A1 (en) * 1998-12-02 2000-06-08 Bosch Gmbh Robert Fuel injector
US6123275A (en) * 1999-08-12 2000-09-26 Delphi Technologies, Inc. Dual gap fuel injector

Also Published As

Publication number Publication date
DE10103932B4 (en) 2010-01-21
JP2004518067A (en) 2004-06-17
EP1358404A1 (en) 2003-11-05
US6896210B2 (en) 2005-05-24
DE10103932A1 (en) 2002-08-29
DE50203408D1 (en) 2005-07-21
US20030168530A1 (en) 2003-09-11
WO2002061270A1 (en) 2002-08-08

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