EP1402175B1 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

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Publication number
EP1402175B1
EP1402175B1 EP02729859A EP02729859A EP1402175B1 EP 1402175 B1 EP1402175 B1 EP 1402175B1 EP 02729859 A EP02729859 A EP 02729859A EP 02729859 A EP02729859 A EP 02729859A EP 1402175 B1 EP1402175 B1 EP 1402175B1
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EP
European Patent Office
Prior art keywords
fuel injection
swirl
injection valve
valve
valve according
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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
EP02729859A
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German (de)
French (fr)
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EP1402175A1 (en
Inventor
Günter DANTES
Detlef Nowak
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1853—Orifice plates
    • F02M61/186—Multi-layered orifice plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size

Definitions

  • the invention relates to a fuel injection valve according to the preamble of claim 1.
  • Swirl-generating means located downstream of the valve seat are typically designed to introduce fuel into radially outboard ends of swirl channels, which is then directed radially inwardly to a swirl chamber into which it enters with a tangential component. From the swirl chamber then exits the swirling fuel. From the DE-OS 198 15 775 A fuel injector is already known in which a swirl disk is provided downstream of the valve seat is, which has such a flow pattern. The swirl disk is supplied to the fuel disordered to inlet portions of the swirl channels; there is no targeted flow guidance to the swirl channels before.
  • the fuel injection valve according to the invention with the features of claim 1 has the advantage that with him a very high Zerstäubungsgüte a fuel to be sprayed is achieved. As a consequence, with such an injection valve of an internal combustion engine u.a. reduces the exhaust emission of the internal combustion engine and also a reduction in fuel consumption can be achieved.
  • the swirl channels of the swirl element are impinged very precisely and reliably by the fuel.
  • exactly the same number of supply channels are provided corresponding to the number of swirl channels of the downstream swirl element, which are directed towards the inlet ends of the swirl channels, so that the fuel supply of the swirl ducts is flow-directed.
  • the swirl element can be produced cost-effectively in a particularly simple manner.
  • a particular advantage is that the swirl elements can be reproduced in a very precise manner in very large quantities at the same time (high batchability).
  • FIG. 1 a partially illustrated fuel injection valve in section
  • FIG. 2 a plan view of the in the fuel injection valve according to FIG. 1 used twist element.
  • FIG. 1 As an exemplary embodiment, a valve in the form of an injection valve for fuel injection systems of mixture-compression spark-ignition internal combustion engines is shown partially and simplified.
  • the injection valve has a tubular valve seat carrier 1 in which a longitudinal opening 3 is formed concentrically to a valve longitudinal axis 2.
  • a valve needle 5 In the longitudinal opening 3, a valve needle 5 is arranged, which has a valve closing portion 7 at its downstream end.
  • the actuation of the injection valve takes place in a known manner, for example electromagnetically.
  • a schematically indicated electromagnetic circuit with a solenoid 10, an armature 11 and a core 12.
  • the armature 11 is connected to the valve closing portion. 7 opposite end of the valve needle 5 by z. B. connected by means of a laser weld and aligned with the core 12.
  • another excitable actuator e.g. a piezo stack to be used in a comparable fuel injection valve or the actuation of the axially movable valve member by a hydraulic pressure or servo pressure.
  • the guiding element 14 has at least one flow opening 15, through which fuel can flow from the longitudinal opening 3 in the direction of a valve seat to guide the valve needle 5 during the axial movement.
  • the e.g. disc-shaped guide member 14 is fixedly connected to a valve seat body 16, for example by means of a circumferential weld.
  • the valve seat body 16 is e.g. at the end remote from the core 12 of the valve seat support 1 by welding tightly mounted.
  • the position of the valve seat body 16 determines the size of the stroke of the valve needle 5, since the one end position of the valve needle 5 is fixed at non-energized solenoid 10 by the system of the valve closing portion 7 at a downstream conically tapered valve seat surface 22 of the valve seat body 16.
  • the other end position of the valve needle 5 is fixed in the excited magnet coil 10, for example, by the system of the armature 11 to the core 12.
  • the path between these two end positions of the valve needle 5 thus represents the stroke.
  • the valve closing portion 7 cooperates with the frusto-conical valve seat surface 22 of the valve seat body 16 to form a sealing seat. Downstream of the valve seat surface 22, the valve seat body 16 has a central outlet opening 23.
  • a disc-shaped receiving part 25th arranged, which serves the secure receiving a smaller, for example, also disc-shaped swirl element 26 and the targeted fuel supply to this swirl element 26.
  • the receiving part 25 is, for example, in turn secured to the valve seat body 16 by welding.
  • the receiving part 25 has a recess 32 for receiving the swirl element 26, wherein the axial depth of the recess 32 at least approximately the thickness of the swirl element 26 corresponds, so that the swirl element 26, for. flush with the end face 27 of the receiving part 25 closes.
  • the receiving part 25 corresponding to the number of radially inwardly extending swirl channels 28 of the swirl element 26 exactly the same number of bore-like feed channels 33 are provided, which are directed to outer inlet ends 34 of the swirl channels 28 out. All feed channels 33 of the receiving part 25 are supplied directly from fuel leaving the outlet opening 23. Starting from this central beginning of the feed channels 33, the feed channels 33 extend obliquely inclined with an axial and an outwardly directed radial component.
  • the feed channels 33 are inserted into the receiving part 25, e.g. introduced by drilling, eroding or laser drilling.
  • the swirl element 26 is a disk-shaped component, which is designed as a spray perforated disk and which is formed, for example, in two layers. About both layers of the swirl element 26 is formed with a peripheral edge which encloses an inner opening structure, in the upper, the valve seat body 16th facing the swirl channels 28 with their inlet ends 34 and an inner swirl chamber 30 includes, while the opening structure is formed in the lower layer of the swirl chamber 30 following outlet opening 29.
  • FIG. 2 shows a plan view of the in the fuel injection valve according to FIG. 1 used swirl element 26.
  • the swirl element 26 has, for example, four swirl channels 28, the inlet ends 34 are supplied with fuel from four feed channels 33, wherein exactly one feed channel ends at a swirl duct 28.
  • the swirl channels 28 extend radially inwardly from the inlet ends 34 in order to open tangentially into the swirl chamber 30 situated in the region of the valve longitudinal axis 2. From there, the swirling fuel leaves the swirl element 26 via the outlet opening 29.
  • the flow according to the invention of the swirl channels 28 of the swirl element 26 is completely independent of the manner of production of the swirl element 26. This can also be formed with other conventional production methods in metal, plastic or other materials.

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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)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Brennstoffeinspritzventil nach dem Oberbegriff des Anspruchs 1.The invention relates to a fuel injection valve according to the preamble of claim 1.

Es ist bereits vielfach bekannt, an Brennstoffeinspritzventilen drallerzeugende Elemente vorzusehen, mit denen dem abzuspritzenden Brennstoff eine Drallkomponente aufgeprägt wird, durch die der Brennstoff besser zerstäubt wird und in kleinere Tröpfchen zerfällt. Dabei ist es bereits bekannt, einerseits die drallerzeugenden Mittel stromaufwärts, also vor dem Ventilsitz und andererseits stromabwärts, also hinter dem Ventilsitz anzuordnen.It is already widely known to provide spin-on elements to fuel injection valves, with which the fuel to be sprayed a swirl component is impressed, through which the fuel is better atomized and disintegrates into smaller droplets. It is already known, on the one hand to arrange the swirl-producing means upstream, ie in front of the valve seat and on the other hand downstream, ie behind the valve seat.

Drallerzeugende Mittel, die stromabwärts des Ventilsitzes angeordnet sind, sind üblicherweise derart gestaltet, dass in radial außer liegende Enden von Drallkanälen Brennstoff eingeleitet wird, der dann radial einwärts zu einer Drallkammer geführt wird, in die er mit einer tangentialen Komponente eintritt. Aus der Drallkammer tritt dann der drallbehaftete Brennstoff aus. Aus der DE-OS 198 15 775 ist bereits ein Brennstoffeinspritzventil bekannt, bei dem stromabwärts des Ventilsitzes eine Drallscheibe vorgesehen ist, die einen solchen Strömungsverlauf aufweist. Der Drallscheibe wird der Brennstoff ungeordnet zu Einlassbereichen der Drallkanäle zugeführt; es liegt keine gezielte Strömungsführung zu den Drallkanälen hin vor.Swirl-generating means located downstream of the valve seat are typically designed to introduce fuel into radially outboard ends of swirl channels, which is then directed radially inwardly to a swirl chamber into which it enters with a tangential component. From the swirl chamber then exits the swirling fuel. From the DE-OS 198 15 775 A fuel injector is already known in which a swirl disk is provided downstream of the valve seat is, which has such a flow pattern. The swirl disk is supplied to the fuel disordered to inlet portions of the swirl channels; there is no targeted flow guidance to the swirl channels before.

In der DE-OS 196 07 288 wurde bereits die sogenannte Multilayergalvanik zur Herstellung von Lochscheiben, die insbesondere für den Einsatz an Brennstoffeinspritzventilen geeignet sind, ausführlich beschrieben. Die mikrogalvanische Metallabscheidung in mehreren Ebenen, Lagen bzw. Schichten kann auch zur Herstellung der Drallscheiben zum Einsatz kommen. US 5018501 A offenbart ein Drallelement, welches in eine zentrale stromaufwärtige Vertiefung eines Aufnahmeteils aufgenommen ist.In the DE-OS 196 07 288 has already been described in detail the so-called multilayer electroplating for the production of perforated discs, which are particularly suitable for use on fuel injection valves. The microgalvanic metal deposition in several levels, layers or layers can also be used for the production of the swirl disks. US 5018501 A discloses a swirl element which is received in a central upstream recess of a female part.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Brennstoffeinspritzventil mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass mit ihm eine sehr hohe Zerstäubungsgüte eines abzuspritzenden Brennstoffs erzielt wird. Als Konsequenz können mit einem solchen Einspritzventil einer Brennkraftmaschine u.a. die Abgasemission der Brennkraftmaschine reduziert und ebenso eine Verringerung des Brennstoffverbrauchs erzielt werden.The fuel injection valve according to the invention with the features of claim 1 has the advantage that with him a very high Zerstäubungsgüte a fuel to be sprayed is achieved. As a consequence, with such an injection valve of an internal combustion engine u.a. reduces the exhaust emission of the internal combustion engine and also a reduction in fuel consumption can be achieved.

In vorteilhafter Weise werden die Drallkanäle des Drallelements sehr exakt und zuverlässig von Brennstoff angeströmt. In einem Aufnahmeteil sind entsprechend der Anzahl der Drallkanäle des stromabwärts folgenden Drallelements genau gleich viele Zuführkanäle vorgesehen, die zu den Einlassenden der Drallkanäle hin gerichtet sind, so dass die Brennstoffversorgung der Drallkanäle strömungsgerichtet erfolgt. Eine solche Anordnung ermöglicht eine Reduzierung des Totvolumens in der Anströmung hinter dem Ventilsitz. Die Gefahr sogenannter Nachspritzer im motorischen Betrieb wird so stark reduziert, da nur wenig oder kein Brennstoff in dem Zuströmbereich gespeichert wird.Advantageously, the swirl channels of the swirl element are impinged very precisely and reliably by the fuel. In a receiving part, exactly the same number of supply channels are provided corresponding to the number of swirl channels of the downstream swirl element, which are directed towards the inlet ends of the swirl channels, so that the fuel supply of the swirl ducts is flow-directed. Such an arrangement allows a reduction of the dead volume in the flow behind the valve seat. The risk of so-called post-splashes in engine operation is so greatly reduced because little or no fuel is stored in the inflow area.

Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Brennstoffeinspritzventils möglich.The measures listed in the dependent claims advantageous refinements and improvements of claim 1 fuel injection valve are possible.

Sehr einfach kann mit dem erfindungsgemäßen Brennstoffeinspritzventil ein schräges Abspritzen von Brennstoff unter einem Winkel γ zur Ventillängsachse erfolgen, das unter bestimmten Einbaubedingungen erforderlich sein kann. In einem solchen Fall wird das Drallelement schräg eingebaut, weshalb dann die Zuführkanäle im Aufnahmeteil eine unterschiedliche Länge aufweisen können.Very simply, with the fuel injection valve according to the invention, an oblique spraying of fuel at an angle γ to the valve longitudinal axis can take place, which may be necessary under certain installation conditions. In such a case, the swirl element is installed at an angle, which is why the feed channels in the receiving part can then have a different length.

In besonders vorteilhafter Weise ist das Drallelement auf besonders einfache Art und Weise kostengünstig herstellbar. Ein besonderer Vorteil besteht darin, dass die Drallelemente in reproduzierbarer Weise äußerst präzise in sehr großen Stückzahlen gleichzeitig gefertigt werden können (hohe Batchfähigkeit). Besonders vorteilhaft ist es dabei, das Drallelement mittels der sogenannten Multilayergalvanik herzustellen. Aufgrund ihrer metallischen Ausbildung sind solche Drallelemente sehr bruchsicher und gut montierbar. Die Anwendung der Multilayergalvanik erlaubt eine extrem große Gestaltungsfreiheit, da die Konturen der Öffnungsbereiche (Drallkanäle, Auslassöffnung) in dem Drallelement frei wählbar sind.In a particularly advantageous manner, the swirl element can be produced cost-effectively in a particularly simple manner. A particular advantage is that the swirl elements can be reproduced in a very precise manner in very large quantities at the same time (high batchability). It is particularly advantageous to produce the swirl element by means of the so-called multilayer electroplating. Due to their metallic design such swirl elements are very shatterproof and easy to assemble. The application of multilayer electroplating allows extremely large freedom of design, since the contours of the opening areas (swirl channels, outlet opening) in the swirl element can be freely selected.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 ein teilweise dargestelltes Brennstoffeinspritzventil im Schnitt und Figur 2 eine Draufsicht auf das in dem Brennstoffeinspritzventil gemäß Figur 1 eingesetzte Drallelement.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 partially illustrated fuel injection valve in section and FIG. 2 a plan view of the in the fuel injection valve according to FIG. 1 used twist element.

Beschreibung der AusführungsbeispieleDescription of the embodiments

In der Figur 1 ist als ein Ausführungsbeispiel ein Ventil in der Form eines Einspritzventils für Brennstoffeinspritzanlagen von gemischverdichtenden fremdgezündeten Brennkraftmaschinen teilweise und vereinfacht dargestellt. Das Einspritzventil hat einen rohrförmigen Ventilsitzträger 1, in dem konzentrisch zu einer Ventillängsachse 2 eine Längsöffnung 3 ausgebildet ist. In der Längsöffnung 3 ist eine Ventilnadel 5 angeordnet, die an ihrem stromabwärtigen Ende einen Ventilschließabschnitt 7 aufweist.In the FIG. 1 As an exemplary embodiment, a valve in the form of an injection valve for fuel injection systems of mixture-compression spark-ignition internal combustion engines is shown partially and simplified. The injection valve has a tubular valve seat carrier 1 in which a longitudinal opening 3 is formed concentrically to a valve longitudinal axis 2. In the longitudinal opening 3, a valve needle 5 is arranged, which has a valve closing portion 7 at its downstream end.

Die Betätigung des Einspritzventils erfolgt in bekannter Weise, beispielsweise elektromagnetisch. Zur axialen Bewegung der Ventilnadel 5 und damit zum Öffnen entgegen der Federkraft einer nicht dargestellten Rückstellfeder bzw. Schließen des Einspritzventils dient ein schematisch angedeuteter elektromagnetischer Kreis mit einer Magnetspule 10, einem Anker 11 und einem Kern 12. Der Anker 11 ist mit dem dem Ventilschließabschnitt 7 abgewandten Ende der Ventilnadel 5 durch z. B. eine mittels eines Lasers ausgebildete Schweißnaht verbunden und auf den Kern 12 ausgerichtet.The actuation of the injection valve takes place in a known manner, for example electromagnetically. For axial movement of the valve needle 5 and thus to open against the spring force of a return spring or closure of the injector, not shown, is a schematically indicated electromagnetic circuit with a solenoid 10, an armature 11 and a core 12. The armature 11 is connected to the valve closing portion. 7 opposite end of the valve needle 5 by z. B. connected by means of a laser weld and aligned with the core 12.

Anstelle des elektromagnetischen Kreises kann auch ein anderer erregbarer Aktuator, wie z.B. ein Piezostack, in einem vergleichbaren Brennstoffeinspritzventil verwendet werden bzw. das Betätigen des axial beweglichen Ventilteils durch einen hydraulischen Druck oder Servodruck erfolgen.Instead of the electromagnetic circuit, another excitable actuator, e.g. a piezo stack to be used in a comparable fuel injection valve or the actuation of the axially movable valve member by a hydraulic pressure or servo pressure.

Zur Führung der Ventilnadel 5 während der Axialbewegung dient eine Führungsöffnung 13 eines Führungselements 14. Das Führungselement 14 weist wenigstens eine Strömungsöffnung 15 auf, durch die Brennstoff aus der Längsöffnung 3 in Richtung zu einem Ventilsitz strömen kann. Das z.B. scheibenförmige Führungselement 14 ist beispielsweise mittels einer umlaufenden Schweißnaht fest mit einem Ventilsitzkörper 16 verbunden. Der Ventilsitzkörper 16 ist z.B. an dem dem Kern 12 abgewandten Ende des Ventilsitzträgers 1 durch Schweißen dicht montiert.The guiding element 14 has at least one flow opening 15, through which fuel can flow from the longitudinal opening 3 in the direction of a valve seat to guide the valve needle 5 during the axial movement. The e.g. disc-shaped guide member 14 is fixedly connected to a valve seat body 16, for example by means of a circumferential weld. The valve seat body 16 is e.g. at the end remote from the core 12 of the valve seat support 1 by welding tightly mounted.

Die Stellung des Ventilsitzkörpers 16 bestimmt die Größe des Hubs der Ventilnadel 5, da die eine Endstellung der Ventilnadel 5 bei nicht erregter Magnetspule 10 durch die Anlage des Ventilschließabschnitts 7 an einer sich stromabwärts konisch verjüngenden Ventilsitzfläche 22 des Ventilsitzkörpers 16 festgelegt ist. Die andere Endstellung der Ventilnadel 5 wird bei erregter Magnetspule 10 beispielsweise durch die Anlage des Ankers 11 an dem Kern 12 festgelegt. Der Weg zwischen diesen beiden Endstellungen der Ventilnadel 5 stellt somit den Hub dar. Der Ventilschließabschnitt 7 wirkt mit der kegelstumpfförmigen Ventilsitzfläche 22 des Ventilsitzkörpers 16 zu einem Dichtsitz zusammen. Stromabwärts der Ventilsitzfläche 22 weist der Ventilsitzkörper 16 eine zentrale Aüslassöffnung 23 auf.The position of the valve seat body 16 determines the size of the stroke of the valve needle 5, since the one end position of the valve needle 5 is fixed at non-energized solenoid 10 by the system of the valve closing portion 7 at a downstream conically tapered valve seat surface 22 of the valve seat body 16. The other end position of the valve needle 5 is fixed in the excited magnet coil 10, for example, by the system of the armature 11 to the core 12. The path between these two end positions of the valve needle 5 thus represents the stroke. The valve closing portion 7 cooperates with the frusto-conical valve seat surface 22 of the valve seat body 16 to form a sealing seat. Downstream of the valve seat surface 22, the valve seat body 16 has a central outlet opening 23.

An dem Ventilsitzkörper 16 ist stromabwärts der Auslassöffnung 23 ein z.B. scheibenförmiges Aufnahmeteil 25 angeordnet, das der sicheren Aufnahme eines kleineren, z.B. ebenfalls scheibenförmigen Drallelements 26 und der gezielten Brennstoffzuführung zu diesem Drallelement 26 dient. Das Aufnahmeteil 25 ist beispielsweise wiederum durch Schweißen an dem Ventilsitzkörper 16 befestigt.On the valve seat body 16 is downstream of the outlet opening 23, for example, a disc-shaped receiving part 25th arranged, which serves the secure receiving a smaller, for example, also disc-shaped swirl element 26 and the targeted fuel supply to this swirl element 26. The receiving part 25 is, for example, in turn secured to the valve seat body 16 by welding.

An seiner stromabwärtigen Stirnseite 27 besitzt das Aufnahmeteil 25 eine Vertiefung 32 zur Aufnahme des Drallelements 26, wobei die axiale Tiefe der Vertiefung 32 zumindest ungefähr der Dicke des Drallelements 26 entspricht, so dass das Drallelement 26 z.B. bündig mit der Stirnseite 27 des Aufnahmeteils 25 abschließt. In dem Aufnahmeteil 25 sind entsprechend der Anzahl von radial nach innen verlaufenden Drallkanälen 28 des Drallelements 26 genau gleich viele bohrungsähnliche Zuführkanäle 33 vorgesehen, die zu äußeren Einlassenden 34 der Drallkanäle 28 hin gerichtet sind. Alle Zuführkanäle 33 des Aufnahmeteils 25 werden unmittelbar von aus der Auslassöffnung 23 austretendem Brennstoff versorgt. Von diesem zentralen Beginn der Zuführkanäle 33 ausgehend verlaufen die Zuführkanäle 33 schräg geneigt mit einer axialen und einer nach außen hin gerichteten radialen Komponente. Auf diese Weise erfolgt die Brennstoffversorgung der Drallkanäle 28 strömungsgerichtet. Eine solche Anordnung ermöglicht eine Reduzierung des Totvolumens in der Anströmung hinter dem Ventilsitz. Die Zuführkanäle 33 werden in das Aufnahmeteil 25 z.B. mittels Bohren, Erodieren oder Laserbohren eingebracht.At its downstream end face 27, the receiving part 25 has a recess 32 for receiving the swirl element 26, wherein the axial depth of the recess 32 at least approximately the thickness of the swirl element 26 corresponds, so that the swirl element 26, for. flush with the end face 27 of the receiving part 25 closes. In the receiving part 25 corresponding to the number of radially inwardly extending swirl channels 28 of the swirl element 26 exactly the same number of bore-like feed channels 33 are provided, which are directed to outer inlet ends 34 of the swirl channels 28 out. All feed channels 33 of the receiving part 25 are supplied directly from fuel leaving the outlet opening 23. Starting from this central beginning of the feed channels 33, the feed channels 33 extend obliquely inclined with an axial and an outwardly directed radial component. In this way, the fuel supply of the swirl channels 28 is flow-directed. Such an arrangement allows a reduction of the dead volume in the flow behind the valve seat. The feed channels 33 are inserted into the receiving part 25, e.g. introduced by drilling, eroding or laser drilling.

Bei dem Drallelement 26 handelt es sich um ein scheibenförmiges Bauteil, das als Spritzlochscheibe ausgeführt ist und das z.B. zweilagig ausgebildet ist. Über beide Lagen ist das Drallelement 26 mit einem umlaufenden Rand ausgebildet, der eine innere Öffnungsstruktur umschließt, die in der oberen, dem Ventilsitzkörper 16 zugewandten Lage die Drallkanäle 28 mit ihren Einlassenden 34 und eine innere Drallkammer 30 umfasst, während die Öffnungsstruktur in der unteren Lage von einer der Drallkammer 30 folgenden Auslassöffnung 29 gebildet wird.The swirl element 26 is a disk-shaped component, which is designed as a spray perforated disk and which is formed, for example, in two layers. About both layers of the swirl element 26 is formed with a peripheral edge which encloses an inner opening structure, in the upper, the valve seat body 16th facing the swirl channels 28 with their inlet ends 34 and an inner swirl chamber 30 includes, while the opening structure is formed in the lower layer of the swirl chamber 30 following outlet opening 29.

Figur 2 zeigt eine Draufsicht auf das in dem Brennstoffeinspritzventil gemäß Figur 1 eingesetzte Drallelement 26. Das Drallelement 26 weist beispielsweise vier Drallkanäle 28 auf, deren Einlassenden 34 mit Brennstoff aus vier Zuführkanälen 33 versorgt werden, wobei genau ein Zuführkanal an einem Drallkanal 28 endet. Die Drallkanäle 28 verlaufen von den Einlassenden 34 radial nach innen, um in die im Bereich der Ventillängsachse 2 befindliche Drallkammer 30 tangential zu münden. Von dort verlässt der drallbehaftete Brennstoff über die Auslassöffnung 29 das Drallelement 26. FIG. 2 shows a plan view of the in the fuel injection valve according to FIG. 1 used swirl element 26. The swirl element 26 has, for example, four swirl channels 28, the inlet ends 34 are supplied with fuel from four feed channels 33, wherein exactly one feed channel ends at a swirl duct 28. The swirl channels 28 extend radially inwardly from the inlet ends 34 in order to open tangentially into the swirl chamber 30 situated in the region of the valve longitudinal axis 2. From there, the swirling fuel leaves the swirl element 26 via the outlet opening 29.

Sehr einfach kann mit dem erfindungsgemäßen Brennstoffeinspritzventil auch ein schräges Abspritzen von Brennstoff unter einem Winkel γ zur Ventillängsachse erfolgen, das unter bestimmten Einbaubedingungen erforderlich sein kann. In einem solchen Fall wird das Drallelement 26 schräg im Aufnahmeteil 25 eingebaut, weshalb dann die Zuführkanäle 33 im Aufnahmeteil 25 unterschiedliche Längen aufweisen, je nach Entfernung der Einlassenden 34 der Drallkanäle 28 zur Auslassöffnung 23.Very simply, with the fuel injection valve according to the invention, an oblique spraying of fuel at an angle γ to the valve longitudinal axis can take place, which may be necessary under certain installation conditions. In such a case, the swirl element 26 is installed obliquely in the receiving part 25, for which reason the feed channels 33 in the receiving part 25 have different lengths, depending on the distance of the inlet ends 34 of the swirl channels 28 to the outlet opening 23.

Das Drallelement 26 wird z.B. in mehreren metallischen Schichten beispielsweise durch galvanische Abscheidung aufgebaut (Multilayergalvanik). Aufgrund der tiefenlithographischen, galvanotechnischen Herstellung gibt es besondere Merkmale in der Konturgebung, von denen hiermit einige in Kurzform zusammenfassend aufgeführt sind:

  • Schichten mit über die Scheibenfläche konstanter Dicke,
  • durch die tiefenlithographische Strukturierung weitgehend senkrechte Einschnitte in den Schichten, welche die jeweils durchströmten Hohlräume bilden (fertigungstechnisch bedingte Abweichungen von ca. 3° gegenüber optimal senkrechten Wandungen können auftreten),
  • gewünschte Hinterschneidungen und Überdeckungen der Einschnitte durch mehrlagigen Aufbau einzeln strukturierter Metallschichten,
  • Einschnitte mit beliebigen, weitgehend achsparallele Wandungen aufweisenden Querschnittsformen,
  • einteilige Ausführung des Drallelements, da die einzelnen Metallabscheidungen unmittelbar aufeinander erfolgen.
The swirl element 26 is constructed, for example, in several metallic layers, for example by electrodeposition (multilayer electroplating). Due to the deep lithographic, electroplating production, there are special features in the contouring, of which hereby some are summarized in short form:
  • Layers with over the disk surface of constant thickness,
  • by the deep lithographic structuring largely vertical incisions in the layers which form the respective cavities through which flow (production-related deviations of about 3 ° with respect to optimally vertical walls can occur),
  • desired undercuts and overlaps of the incisions by multilayer construction of individually structured metal layers,
  • Incisions with any, largely axially parallel walls having cross-sectional shapes,
  • one-piece design of the swirl element, since the individual metal deposits occur directly on each other.

Die erfindungsgemäße Anströmung der Drallkanäle 28 des Drallelements 26 ist jedoch völlig unabhängig von der Herstellungsweise des Drallelements 26. Diese kann auch mit anderen konventionellen Herstellungsverfahren in Metall, Kunststoff oder anderen Materialien ausgeformt werden.However, the flow according to the invention of the swirl channels 28 of the swirl element 26 is completely independent of the manner of production of the swirl element 26. This can also be formed with other conventional production methods in metal, plastic or other materials.

Claims (10)

  1. Fuel injection valve for fuel injection systems of internal combustion engines, in particular for the direct injection of fuel into a combustion space of an internal combustion engine, with a valve longitudinal axis (2), with an actuator (10, 11, 12), with a movable valve part (5, 7) which, for opening and closing the valve, cooperates with a fixed valve seat (22) which is formed on a valve-seat body (16), and with a swirl element (26) which is arranged downstream of the valve seat (22) and which has at least one inlet and at least one outlet port (29) and possesses, upstream of the outlet port (29), at least one swirl duct (28), characterized in that the swirl element (26) is received in a reception part (25) and exactly one feed duct (33) formed in the reception part (25) is directed towards each inlet end (34) of a swirl duct (28).
  2. Fuel injection valve according to Claim 1, characterized in that an outlet port (23) is provided centrally, downstream of the valve seat (22), in the valve-seat body (16) and directly supplies all the feed ducts (33) in the reception part (25).
  3. Fuel injection valve according to Claim 1 or 2, characterized in that the reception part (25) and the swirl element (26) are in each case of disc-shaped design.
  4. Fuel injection valve according to Claim 3, characterized in that the reception part (25) has, on its downstream end face (27), a depression (32) in which the swirl element (26) is introduced.
  5. Fuel injection valve according to one of Claims 1 to 4, characterized in that the feed ducts (33) are designed as bores in the reception part (25).
  6. Fuel injection valve according to one of the preceding claims, characterized in that the feed ducts (33) run, inclined obliquely, with an axial component and with an outwardly directed radial component.
  7. Fuel injection valve according to Claim 5 or 6, characterized in that the feed ducts (33) can be shaped out by means of drilling, erosion or laser drilling.
  8. Fuel injection valve according to one of the preceding claims, characterized in that the swirl ducts (28) run radially inwards to a swirl chamber (30) from the inlet ends (34).
  9. Fuel injection valve according to one of Claims 1 to 8, characterized in that the swirl element (26) can be produced by means of multi-layered metal electrodeposition.
  10. Fuel injection valve according to one of the preceding claims, characterized in that the reception part (25) is fastened to the valve-seat body (16).
EP02729859A 2001-04-12 2002-04-09 Fuel injection valve Expired - Lifetime EP1402175B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10118276A DE10118276A1 (en) 2001-04-12 2001-04-12 Fuel injection valve has helical element in receiving part with input channels for each inlet end of helical channel
DE10118276 2001-04-12
PCT/DE2002/001288 WO2002084111A1 (en) 2001-04-12 2002-04-09 Fuel injection valve

Publications (2)

Publication Number Publication Date
EP1402175A1 EP1402175A1 (en) 2004-03-31
EP1402175B1 true EP1402175B1 (en) 2008-03-05

Family

ID=7681353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02729859A Expired - Lifetime EP1402175B1 (en) 2001-04-12 2002-04-09 Fuel injection valve

Country Status (7)

Country Link
US (1) US20040011895A1 (en)
EP (1) EP1402175B1 (en)
JP (1) JP2004518908A (en)
CN (1) CN1461383A (en)
CZ (1) CZ20023956A3 (en)
DE (2) DE10118276A1 (en)
WO (1) WO2002084111A1 (en)

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Publication number Priority date Publication date Assignee Title
JP2009243322A (en) * 2008-03-31 2009-10-22 Hitachi Ltd Fuel injection valve and machining method of guide member
CN102410121A (en) * 2011-09-08 2012-04-11 何林霏 S-shaped atomizing nozzle
JP5875442B2 (en) * 2012-03-30 2016-03-02 日立オートモティブシステムズ株式会社 Fuel injection valve
JP5887291B2 (en) * 2013-03-08 2016-03-16 日立オートモティブシステムズ株式会社 Fuel injection valve
JP6433162B2 (en) * 2014-02-12 2018-12-05 株式会社エンプラス Nozzle plate for fuel injector
JP6524788B2 (en) * 2015-05-11 2019-06-05 株式会社Ihi Fuel injection device and engine
US10344725B2 (en) * 2017-06-14 2019-07-09 Continental Powertrain, USA, LLC. Fluid injector spray disc having offset channel architecture, and methods for constructing and utilizing same
EP3728826A1 (en) * 2017-12-21 2020-10-28 3M Innovative Properties Company Fluid injector nozzle with swirl chamber
US20220143633A1 (en) * 2019-02-25 2022-05-12 Cummins Inc. Swirl seat nozzle
CN113279845B (en) * 2021-05-23 2022-02-11 南岳电控（衡阳）工业技术股份有限公司 Two-stage rotational flow urea injector

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US1843821A (en) * 1929-09-30 1932-02-02 Joslyn Diesel Engine Company L Fuel atomizing nozzle
DE827139C (en) * 1948-02-16 1952-01-07 Lucas Ltd Joseph Injection nozzle for internal combustion engines
JPS5854264B2 (en) * 1979-02-23 1983-12-03 トヨタ自動車株式会社 Constant pressure fuel injection valve
DE3013007C2 (en) * 1980-04-03 1994-01-05 Bosch Gmbh Robert Injection valve for fuel injection systems of internal combustion engines
JPS60222557A (en) * 1984-04-20 1985-11-07 Hitachi Ltd Electromagnetic fuel injection valve
DE3943005A1 (en) * 1988-12-28 1990-07-05 Hitachi Ltd ELECTROMAGNETIC INJECTOR DEVICE
US5570841A (en) * 1994-10-07 1996-11-05 Siemens Automotive Corporation Multiple disk swirl atomizer for fuel injector
DE19607277A1 (en) 1995-03-29 1996-10-02 Bosch Gmbh Robert Perforated disc, in particular for injection valves
BR9605943A (en) * 1995-03-29 1997-08-19 Bosch Gmbh Robert Perforated disc particularly for injection valves
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DE19815800A1 (en) * 1998-04-08 1999-10-14 Bosch Gmbh Robert Fuel injector

Also Published As

Publication number Publication date
WO2002084111A1 (en) 2002-10-24
US20040011895A1 (en) 2004-01-22
JP2004518908A (en) 2004-06-24
EP1402175A1 (en) 2004-03-31
CZ20023956A3 (en) 2004-07-14
CN1461383A (en) 2003-12-10
DE50211838D1 (en) 2008-04-17
DE10118276A1 (en) 2002-10-17

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