EP2718558B1 - Injection valve for internal combustion engines - Google Patents

Injection valve for internal combustion engines Download PDF

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Publication number
EP2718558B1
EP2718558B1 EP12716423.4A EP12716423A EP2718558B1 EP 2718558 B1 EP2718558 B1 EP 2718558B1 EP 12716423 A EP12716423 A EP 12716423A EP 2718558 B1 EP2718558 B1 EP 2718558B1
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EP
European Patent Office
Prior art keywords
hole
valve seat
valve
section
seat body
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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.)
Not-in-force
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EP12716423.4A
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German (de)
French (fr)
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EP2718558A1 (en
Inventor
Marco Vorbach
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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
    • 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
    • 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
    • F02M61/166—Selection of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—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
    • F02M61/1846—Dimensional characteristics of discharge 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
    • F02M61/188—Spherical or partly spherical shaped valve member ends

Definitions

  • the invention relates to an injection valve for internal combustion engines according to the preamble of claim 1.
  • Multi-hole injection valve fuel injection valve for internal combustion engines ( DE 10 2005 036 951 A1 ) has a valve seat body closing a hollow cylindrical valve seat carrier which delimits a valve chamber connected to a fuel supply.
  • a valve seat in the form of an axis of the valve seat body concentrically enclosing annular surface and a plurality of spray holes are formed.
  • the valve seat forms with a closing body of a valve seat carrier axially displaceably arranged valve member a final injection ports sealing seat. The valve member is acted upon by a closing head on the valve seat aufpressenden valve closing spring.
  • Each of the plurality of spray holes has an upstream, small cross-section hole inlet portion with a hole inlet opening and a downstream, larger cross-sectional hole exit portion with a hole outlet opening.
  • the hole inlet openings of all injection holes lie within the valve seat forming annular surface on the valve body and the hole outlet openings of all the injection holes in the side facing away from the valve chamber, convex outer body wall of the valve seat body.
  • the injection valve according to the invention with the features of claim 1 has the advantage that air can flow from the outside into the hole outlet sections through the groove connecting all hole exit sections of the injection holes, so that a sufficient ventilation is provided and thus the pressure conditions in the hole exit sections are positively changed.
  • the valve closing phase no negative pressure is now generated in the hole outlet sections by the emerging wake flow, which pulls the fuel film built up during the injection phase on the wall surfaces of the hole outlet sections in the direction of hole outlet openings.
  • the escape of the fuel film from the hole outlet openings is suppressed, and the deposits resulting from the engine combustion do not occur at the sputtering-critical hole outlet openings, but in the interior of the hole outlet sections and are therefore no longer relevant to exhaust gas.
  • the soot emission of the internal combustion engine can be kept largely constant over its lifetime and avoided with increasing life so far accompanying increase in soot emissions in the exhaust gas.
  • An injection valve for internal combustion engines is already known, which is designed with a sealing seat formed by a valve seat and a closing head of a valve member.
  • the injection valve has a plurality of injection holes arranged downstream of the sealing seat, each having at least one upstream hole entry section with the smallest hole cross section and a hole inlet opening and a downstream hole exit section with the largest hole cross section and a hole outlet opening, wherein the injection holes have a constant diameter over their entire length, so that the smallest hole cross section and the largest hole cross section are the same.
  • the hole exit sections of the injection holes open into a groove introduced on the nozzle body, which has a larger opening width than the hole exit sections of the injection holes.
  • the groove width is smaller than the diameter of the hole outlet openings.
  • the hole outlet openings are arranged on a divider circle and connecting the hole outlet openings groove formed annular.
  • FIG. 1 partially with its discharge-side end in longitudinal section schematically sketched injection valve for injecting fuel into a combustion cylinder of an internal combustion engine has a sleeve-shaped valve seat support 11 which protrudes from a valve housing, not shown here and is closed at its free end with a valve seat body 12.
  • a valve seat 14 in the form of an annular surface concentric with the axis of the valve seat body 12 is formed on the inner wall of the valve seat body 12 delimiting a valve chamber 13 and forms a so-called sealing seat together with a closing head 15 of a valve member 16 axially displaceable in the valve seat carrier 12.
  • the closing head 15 is attached to the front end of a hollow cylindrical valve needle 17 of the valve member 16, z. B. welded.
  • the valve needle 17 has radial bores 18 and communicates with a fuel inlet, not shown here, formed in the valve housing, so that fuel from the fuel inlet via the valve needle 17 and the radial bores 18 passes into the valve chamber 13 and there is under pressure at the sealing seat.
  • a valve closing spring 19 and an actuator 20, which in FIG. 1 are indicated schematically.
  • the actuator 20 is z. B. an electromagnet.
  • the valve closing spring 19 presses the closing head 15 onto the valve seat 14. By means of the electromagnetic actuator 20 of the closing head 15 is lifted against the restoring force of the valve closing spring 19 from the valve seat 14 more or less.
  • spray holes 21 are arranged in the valve seat body, each having at least two stepped in cross-section hole portions, namely an upstream hole inlet portion 22 with the smallest hole cross section and a hole inlet opening 221 and a downstream hole exit portion 23 with the largest hole cross-section and a hole outlet opening 231.
  • upstream Locheinbergsabites 22 with the smallest hole cross-section and downstream hole exit section 23 with the largest hole cross-section further, with increasing cross-section stepped hole sections may be present.
  • All hole inlet openings 221 on the one hand and all hole outlet openings 231 on the other hand lie on a pitch circle in mutually parallel planes which extend transversely to the axis of the valve seat body 12.
  • the hole inlet openings 221 of the hole inlet sections 22 lie in the valve body 13 delimiting the inner body wall of the valve seat body 12, in one of the trained as an annular surface valve seat 14, central zone of the inner body wall of the valve seat body 12, and the hole outlet openings 231 of the hole exit sections 23rd lie in the remote from the valve chamber 13, outer body wall of the valve seat body 12, in a dome-shaped here, central region of the valve seat body 12.
  • a trough-shaped recess 24 is formed, in which the hole inlet openings 221 lie.
  • the injection holes 21 are aligned in the valve seat body 12 so that their hole axes are inclined at an injection angle to the axis of the valve seat body 12.
  • a groove 25 is incorporated into the remote from the valve chamber 13 outer wall of the valve seat body 12 so that it passes with downstream groove opening through all hole exit sections 23 and so all hole exit sections 23 of the injection holes 21 interconnects.
  • the groove 25 is formed annularly for this purpose.
  • the groove width is smaller than the diameter of the hole outlet openings 231.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Einspritzventil für Brennkraftmaschinen nach dem Oberbegriff des Anspruchs 1.The invention relates to an injection valve for internal combustion engines according to the preamble of claim 1.

Ein bekanntes, als sog. Mehrloch-Einspritzventil ausgeführtes Brennstoffeinspritzventil für Brennkraftmaschinen ( DE 10 2005 036 951 A1 ) weist einen einen hohlzylindrischen Ventilsitzträger abschließenden Ventilsitzkörper auf, der eine mit einer Brennstoffzuführung in Verbindung stehende Ventilkammer begrenzt. In dem Ventilsitzkörper sind ein Ventilsitz in Form einer die Achse des Ventilsitzkörpers konzentrisch umschließenden Ringfläche sowie eine Mehrzahl von Spritzlöchern ausgebildet. Der Ventilsitz bildet mit einem Schließkörper eines im Ventilsitzträger axial verschiebbar angeordneten Ventilglieds einen die Spritzlöcher abschließenden Dichtsitz. Das Ventilglied ist von einer den Schließkopf auf den Ventilsitz aufpressenden Ventilschließfeder beaufschlagt. Mittels eines auf das Ventilglied wirkenden elektromagnetischen Aktors kann der Schließkopf gegen die Rückstellkraft der Ventilschließfeder mehr oder weniger weit vom Ventilsitz abgehoben werden. Jedes der Mehrzahl der Spritzlöcher weist einen stromaufwärtigen, querschnittskleinen Locheintrittsabschnitt mit einer Locheintrittsöffnung und einen stromabwärtigen, querschnittsgrößeren Lochaustrittsabschnitt mit einer Lochaustrittsöffnung auf. Die Locheintrittsöffnungen aller Spritzlöcher liegen innerhalb der den Ventilsitz bildenden Ringfläche am Ventilkörper und die Lochaustrittsöffnungen aller Spritzlöcher in der von der Ventilkammer abgekehrten, konvexen äußeren Körperwand des Ventilsitzkörpers.A known, designed as a so-called. Multi-hole injection valve fuel injection valve for internal combustion engines ( DE 10 2005 036 951 A1 ) has a valve seat body closing a hollow cylindrical valve seat carrier which delimits a valve chamber connected to a fuel supply. In the valve seat body, a valve seat in the form of an axis of the valve seat body concentrically enclosing annular surface and a plurality of spray holes are formed. The valve seat forms with a closing body of a valve seat carrier axially displaceably arranged valve member a final injection ports sealing seat. The valve member is acted upon by a closing head on the valve seat aufpressenden valve closing spring. By means of an electromagnetic actuator acting on the valve member, the closing head can be lifted more or less far from the valve seat against the restoring force of the valve closing spring. Each of the plurality of spray holes has an upstream, small cross-section hole inlet portion with a hole inlet opening and a downstream, larger cross-sectional hole exit portion with a hole outlet opening. The hole inlet openings of all injection holes lie within the valve seat forming annular surface on the valve body and the hole outlet openings of all the injection holes in the side facing away from the valve chamber, convex outer body wall of the valve seat body.

Bei einem solchen Einspritzventil mit im Querschnitt gestuften Spritzlöchern im Ventilsitzkörper, die in stromabwärtiger Richtung eine Vergrößerung ihres Lochquerschnitts besitzen, ist die Neigung zur Belagbildung aus verbranntem Kraftstoff und Verkokung und damit die Gefahr des Zusetzen des freien Querschnitts der Spritzlöcher reduziert. Es hat sich jedoch gezeigt, dass die am Ende der Einspritzung aus den Spritzlöchern austretende Strömung aufgrund ihrer Trägheit im Nachlauf ein Unterdruckgebiet erzeugt, das den während der Einspritzung an der Lochwand der Lochaustrittsabschnitte aufgebauten Kraftstofffilm in Richtung Austrittskante der Lochaustrittsöffnungen zieht. Hier werden einerseits die anhaftenden Kraftstofflamellen durch die motorische Verbrennung in Ablagerungen umgewandelt und andererseits nichtanhaftende Kraftstofflamellen in den Brennraum eingetragen. Letztere nehmen durch die schlechte Aufbereitungsgüte nur ungenügend an der Verbrennung teil, was zu einem Anstieg der Russemission führt.In such an injection valve with stepped spray holes in the valve seat body in the downstream, an enlargement of their hole cross-section own, the tendency to buildup of burned fuel and coking, and thus the risk of clogging the free cross section of the injection holes is reduced. However, it has been found that the flow exiting the spray holes at the end of the injection due to their inertia in the wake generates a negative pressure area that pulls the fuel film built up during the injection on the hole wall of the hole outlet sections in the direction of the exit edge of the hole outlet openings. Here, on the one hand, the adhering fuel lamellae are converted into deposits by the engine combustion and, on the other hand, non-adhering fuel lamellae are introduced into the combustion chamber. The latter, due to the poor quality of the treatment, only insufficiently participate in the combustion, which leads to an increase in soot emission.

Offenbarung der ErfindungDisclosure of the invention

Das erfindungsgemäße Einspritzventil mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass durch die alle Lochaustrittsabschnitte der Spritzlöcher verbindenden Nut von außen Luft in die Lochaustrittsabschnitte einströmen kann, so dass eine ausreichende Belüftung gegeben ist und damit die Druckverhältnisse in den Lochaustrittsabschnitten positiv verändert werden. In der Ventilschließphase wird in den Lochaustrittsabschnitten jetzt kein Unterdruck mehr durch die austretende Nachlaufströmung erzeugt, der den während der Einspritzphase an den Wandflächen der Lochaustrittsabschnitte aufgebauten Kraftstofffilm in Richtung Lochaustrittsöffnungen zieht. Das Austreten des Kraftstofffilms aus den Lochaustrittsöffnungen wird unterbunden, und die durch die motorische Verbrennung entstehenden Ablagerungen treten nicht an den zerstäubungskritischen Lochaustrittsöffnungen, sondern im Innern der Lochaustrittsabschnitte auf und sind damit nicht mehr abgasrelevant. Damit kann die Rußemmission der Brennkraftmaschine über deren Lebensdauer hinweg weitgehend konstant gehalten und der mit zunehmender Lebensdauer bisher einhergehender Anstieg der Rußemmission im Abgas vermieden werden.The injection valve according to the invention with the features of claim 1 has the advantage that air can flow from the outside into the hole outlet sections through the groove connecting all hole exit sections of the injection holes, so that a sufficient ventilation is provided and thus the pressure conditions in the hole exit sections are positively changed. In the valve closing phase, no negative pressure is now generated in the hole outlet sections by the emerging wake flow, which pulls the fuel film built up during the injection phase on the wall surfaces of the hole outlet sections in the direction of hole outlet openings. The escape of the fuel film from the hole outlet openings is suppressed, and the deposits resulting from the engine combustion do not occur at the sputtering-critical hole outlet openings, but in the interior of the hole outlet sections and are therefore no longer relevant to exhaust gas. Thus, the soot emission of the internal combustion engine can be kept largely constant over its lifetime and avoided with increasing life so far accompanying increase in soot emissions in the exhaust gas.

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

Aus der FR 2 528 915 A ist bereits ein Einspritzventil für Brennkraftmaschinen bekannt, das mit einem von einem Ventilsitz und einem Schließkopf eines Ventilglieds gebildeten Dichtsitz ausgeführt ist. Außerdem besitzt das Einspritzventil mehrere, stromabwärts des Dichtsitzes angeordnete Spritzlöchern, die jeweils mindestens einen stromaufwärtigen Locheintrittsabschnitt mit kleinstem Lochquerschnitt und einer Locheintrittsöffnung und einen stromabwärtigen Lochaustrittsabschnitt mit größtem Lochquerschnitt und einer Lochaustrittsöffnung aufweisen, wobei die Spritzlöcher dabei einen konstanten Durchmesser über ihre gesamte Länge besitzen, so dass der kleinste Lochquerschnitt und der größte Lochquerschnitt gleich sind. Die Lochaustrittsabschnitte der Spritzlöcher münden in einer am Düsenkörper eingebrachten Nut, die eine größere Öffnungsweite als die Lochaustrittsabschnitte der Spritzlöcher hat.From the FR 2 528 915 A An injection valve for internal combustion engines is already known, which is designed with a sealing seat formed by a valve seat and a closing head of a valve member. In addition, the injection valve has a plurality of injection holes arranged downstream of the sealing seat, each having at least one upstream hole entry section with the smallest hole cross section and a hole inlet opening and a downstream hole exit section with the largest hole cross section and a hole outlet opening, wherein the injection holes have a constant diameter over their entire length, so that the smallest hole cross section and the largest hole cross section are the same. The hole exit sections of the injection holes open into a groove introduced on the nozzle body, which has a larger opening width than the hole exit sections of the injection holes.

Gemäß einer vorteilhaften Ausführungsform der Erfindung ist die Nutbreite kleiner als der Durchmesser der Lochaustrittsöffnungen. Dadurch wird in den Lochaustrittsabschnitten eine Verwirbelung der von außen einströmenden Luft erzielt, was eine sehr gute Belüftung der Lochaustrittsabschnitte gewährleistet.According to an advantageous embodiment of the invention, the groove width is smaller than the diameter of the hole outlet openings. As a result, a turbulence of the air flowing in from the outside is achieved in the hole outlet sections, which ensures very good ventilation of the hole outlet sections.

Gemäß einer vorteilhaften Ausführungsform der Erfindung sind die Lochaustrittsöffnungen auf einem Teilerkreis angeordnet und die die Lochaustrittsöffnungen verbindende Nut kreisringförmig ausgeführt.According to an advantageous embodiment of the invention, the hole outlet openings are arranged on a divider circle and connecting the hole outlet openings groove formed annular.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die Erfindung ist anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

  • Figur 1 ausschnittweise einen Längsschnitt eines Einspritzventils für eine Brennkraftmaschine,
  • Figur 2 eine Unteransicht des Einspritzventils in Figur 1,
  • Figur 3 ausschnittweise eine Draufsicht gemäß Pfeil III in Figur 1,
  • Figur 4 einen Schnitt längs der Linie IV - IV in Figur 3.
The invention is explained in more detail in the following description with reference to an embodiment shown in the drawings. Show it:
  • FIG. 1 1 in a section of a longitudinal section of an injection valve for an internal combustion engine,
  • FIG. 2 a bottom view of the injection valve in FIG. 1 .
  • FIG. 3 in sections, a plan view according to arrow III in FIG. 1 .
  • FIG. 4 a section along the line IV - IV in FIG. 3 ,

Das in Figur 1 ausschnittweise mit seinem abspritzseitigen Ende im Längsschnitt schematisch skizzierte Einspritzventil zum Einspritzen von Kraftstoff in einen Verbrennungszylinder einer Brennkraftmaschine weist einen hülsenförmigen Ventilsitzträger 11 auf, der aus einem hier nicht dargestellten Ventilgehäuse herausragt und an seinem freien Ende mit einem Ventilsitzkörper 12 abgeschlossen ist. An der eine Ventilkammer 13 begrenzenden Innenwand des Ventilsitzkörpers 12 ist ein Ventilsitz 14 in Form einer zur Achse des Ventilsitzkörpers 12 konzentrischen Ringfläche ausgebildet, der zusammen mit einem Schließkopf 15 eines im Ventilsitzträger 12 axial verschieblich angeordneten Ventilglieds 16 einen sog. Dichtsitz bildet. Der Schließkopf 15 ist an dem stirnseitigen Ende einer hohlzylindrischen Ventilnadel 17 des Ventilglieds 16 befestigt, z. B. angeschweißt. Die Ventilnadel 17 weist Radialbohrungen 18 auf und steht mit einem hier nicht dargestellten, im Ventilgehäuse ausgebildeten Kraftstoffzulauf in Verbindung, so dass Kraftstoff von dem Kraftstoffzulauf über die Ventilnadel 17 und den Radialbohrungen 18 in die Ventilkammer 13 gelangt und dort unter Druck an dem Dichtsitz ansteht. An dem Ventilglied 16 greift in bekannter Weise eine Ventilschließfeder 19 und ein Aktor 20 an, die in Figur 1 schematisch angedeutet sind. Der Aktor 20 ist z. B. ein Elektromagnet. Die Ventilschließfeder 19 presst den Schließkopf 15 auf den Ventilsitz 14 auf. Mittels des elektromagnetischen Aktors 20 wird der Schließkopf 15 gegen die Rückstellkraft der Ventilschließfeder 19 vom Ventilsitz 14 mehr oder weniger weit abgehoben.This in FIG. 1 partially with its discharge-side end in longitudinal section schematically sketched injection valve for injecting fuel into a combustion cylinder of an internal combustion engine has a sleeve-shaped valve seat support 11 which protrudes from a valve housing, not shown here and is closed at its free end with a valve seat body 12. A valve seat 14 in the form of an annular surface concentric with the axis of the valve seat body 12 is formed on the inner wall of the valve seat body 12 delimiting a valve chamber 13 and forms a so-called sealing seat together with a closing head 15 of a valve member 16 axially displaceable in the valve seat carrier 12. The closing head 15 is attached to the front end of a hollow cylindrical valve needle 17 of the valve member 16, z. B. welded. The valve needle 17 has radial bores 18 and communicates with a fuel inlet, not shown here, formed in the valve housing, so that fuel from the fuel inlet via the valve needle 17 and the radial bores 18 passes into the valve chamber 13 and there is under pressure at the sealing seat. On the valve member 16 engages in a known manner a valve closing spring 19 and an actuator 20, which in FIG. 1 are indicated schematically. The actuator 20 is z. B. an electromagnet. The valve closing spring 19 presses the closing head 15 onto the valve seat 14. By means of the electromagnetic actuator 20 of the closing head 15 is lifted against the restoring force of the valve closing spring 19 from the valve seat 14 more or less.

Stromabwärts des Dichtsitzes sind im Ventilsitzkörper 12 Spritzlöcher 21 angeordnet, die jeweils mindestens zwei im Querschnitt gestufte Lochabschnitte aufweisen, und zwar einen stromaufwärtigen Locheintrittsabschnitt 22 mit kleinstem Lochquerschnitt und einer Locheintrittsöffnung 221 und einen stromabwärtigen Lochaustrittsabschnitt 23 mit größtem Lochquerschnitt und einer Lochaustrittsöffnung 231. Zwischen stromaufwärtigem Locheintrittsabschnitt 22 mit kleinstem Lochquerschnitt und stromabwärtigem Lochaustrittsabschnitt 23 mit größtem Lochquerschnitt können weitere, mit zunehmendem Querschnitt gestufte Lochabschnitte vorhanden sein. Alle Locheintrittsöffnungen 221 einerseits und alle Lochaustrittsöffnungen 231 andererseits liegen auf einem Teilerkreis in zueinander parallelen Ebenen, die sich quer zur Achse des Ventilsitzkörpers 12 erstrecken. Die Locheintrittsöffnungen 221 der Locheintrittsabschnitte 22 liegen dabei in der die Ventilkammer 13 begrenzenden, inneren Körperwand des Ventilsitzkörpers 12, und zwar in einer von dem als Ringfläche ausgebildeten Ventilsitz 14 umschlossenen, zentralen Zone der inneren Körperwand des Ventilsitzkörpers 12, und die Lochaustrittsöffnungen 231 der Lochaustrittsabschnitte 23 liegen dabei in der von der Ventilkammer 13 abgekehrten, äußeren Körperwand des Ventilsitzkörpers 12, und zwar in einem hier kalottenförmig geformten, zentralen Bereich des Ventilsitzkörpers 12. Im dargestellten Ausführungsbeispiel ist in die vom Ventilsitz 14 umschlossene, zentrale Zone der inneren Körperwand des Ventilsitzkörpers 12 eine muldenförmige Vertiefung 24 eingeformt, in der die Locheintrittsöffnungen 221 liegen. Die Spritzlöcher 21 sind im Ventilsitzkörper 12 so ausgerichtet, dass ihre Lochachsen unter einem spritzen Winkel zur Achse des Ventilsitzkörpers 12 geneigt sind.Downstream of the sealing seat 12 spray holes 21 are arranged in the valve seat body, each having at least two stepped in cross-section hole portions, namely an upstream hole inlet portion 22 with the smallest hole cross section and a hole inlet opening 221 and a downstream hole exit portion 23 with the largest hole cross-section and a hole outlet opening 231. Between upstream Locheintrittsabschnitt 22 with the smallest hole cross-section and downstream hole exit section 23 with the largest hole cross-section, further, with increasing cross-section stepped hole sections may be present. All hole inlet openings 221 on the one hand and all hole outlet openings 231 on the other hand lie on a pitch circle in mutually parallel planes which extend transversely to the axis of the valve seat body 12. The hole inlet openings 221 of the hole inlet sections 22 lie in the valve body 13 delimiting the inner body wall of the valve seat body 12, in one of the trained as an annular surface valve seat 14, central zone of the inner body wall of the valve seat body 12, and the hole outlet openings 231 of the hole exit sections 23rd lie in the remote from the valve chamber 13, outer body wall of the valve seat body 12, in a dome-shaped here, central region of the valve seat body 12. In the illustrated embodiment, in the valve seat 14 enclosed, central zone of the inner body wall of the valve seat body 12 a trough-shaped recess 24 is formed, in which the hole inlet openings 221 lie. The injection holes 21 are aligned in the valve seat body 12 so that their hole axes are inclined at an injection angle to the axis of the valve seat body 12.

Um Ablagerungen von verbranntem Kraftstoff an den umlaufenden Kanten der Lochaustrittsöffnungen 231 zu verhindern und damit einem Langzeitanstieg der Russemission im Abgas entgegenzuwirken, ist in die von der Ventilkammer 13 abgekehrte Außenwand des Ventilsitzkörpers 12 eine Nut 25 so eingearbeitet, dass sie mit stromabwärts weisender Nutöffnung durch alle Lochaustrittsabschnitte 23 hindurch verläuft und so alle Lochaustrittsabschnitte 23 der Spritzlöcher 21 miteinander verbindet. Die Nut 25 ist hierzu kreisringförmig ausgebildet. Die Nutbreite ist kleiner als der Durchmesser der Lochaustrittsöffnungen 231. In Figur 3 und 4 sind für ein Spritzloch 21 im Ventilsitzkörper 12 Nut 25 und Spritzloch 21 mit Locheintrittsabschnitt 22, Locheintrittsöffnung 221, Lochaustrittsabschnitt 23 und Lochaustrittsöffnung 231 in Draufsicht und Schnitt vergrößert dargestellt. Die Spritzlöcher 21 und die Nut 25 werden direkt im MIM-(Metallpulverspritz-)Prozess bei der Herstellung des Ventilsitzkörpers 16 realisiert. To prevent deposits of burnt fuel at the peripheral edges of the hole outlet openings 231 and thus a long-term increase in the To counter soot emission in the exhaust, a groove 25 is incorporated into the remote from the valve chamber 13 outer wall of the valve seat body 12 so that it passes with downstream groove opening through all hole exit sections 23 and so all hole exit sections 23 of the injection holes 21 interconnects. The groove 25 is formed annularly for this purpose. The groove width is smaller than the diameter of the hole outlet openings 231. In FIGS. 3 and 4 For a spray hole 21 in the valve seat body 12 groove 25 and spray hole 21 with hole inlet portion 22, hole inlet opening 221, hole outlet portion 23 and hole outlet opening 231 in plan view and section shown enlarged. The injection holes 21 and the groove 25 are realized directly in the MIM (metal powder injection) process in the manufacture of the valve seat body 16.

Claims (8)

  1. Injection valve for internal combustion engines, having a sealing seat formed by a valve seat (14) and by a closing head (15) of a valve element (16), and having multiple spray holes (21) which are arranged downstream of the sealing seat and which each have at least one upstream hole inlet section (22), with a smallest hole cross section and with a hole inlet opening (221), and one downstream hole outlet section (23), with a largest hole cross section and with a hole outlet opening (231), characterized in that, between the upstream hole inlet section (23) with smallest hole cross section and the downstream hole outlet section (23) with largest hole cross section of the spray holes (21), there is provided at least one step such that the largest hole cross section is larger than the smallest hole cross section, and the hole outlet sections (23) are connected to one another by way of a groove (25) with a groove opening pointing downstream.
  2. Injection valve according to Claim 1, characterized in that the groove width is smaller than the hole diameter of the hole outlet openings (231).
  3. Injection valve according to Claim 1 or 2, characterized in that valve seat (14), spray holes (21) and groove (25) are arranged in a valve seat body (12) which closes off a valve chamber (13) in a downstream direction, said arrangement being such that the valve seat (14) is formed concentrically with respect to the axis of the valve seat body (12) on an inner body wall, which delimits the valve chamber (13), of the valve seat body (12) and the hole inlet openings (221) of the hole inlet sections (22) are situated in a zone, which is enclosed by the valve seat (14), of the inner body wall and the hole outlet openings (231) of the hole outlet sections (23) are situated in the outer body wall, which is averted from the valve chamber (13), of the valve seat body (12).
  4. Injection valve according to Claim 3, characterized in that the hole inlet openings (221) of all of the hole inlet sections (22) of the spray holes (21) are situated in a depression-like recess (24) which is formed in that zone of the inner body wall of the valve seat body (12) which is enclosed by the valve seat (14).
  5. Injection valve according to Claim 3 or 4, characterized in that the hole outlet openings (231) of all of the hole outlet sections (23) of the spray holes (21) are arranged on a reference circle that is concentric with respect to the axis of the valve seat body (12), and the groove (25) is of circular form.
  6. Injection valve according to one of Claims 3 to 5, characterized in that the spray holes (19) in the valve seat body (12) are oriented such that their hole axes are inclined at an acute angle with respect to the axis of the valve seat body (12).
  7. Injection valve according to one of Claims 3 to 6, characterized in that the valve seat body (12) is fastened in fluid-tight fashion to a valve seat carrier (11), and the valve element (16) is arranged in axially displaceable fashion in the valve seat carrier (11) and can be actuated by way of an actuator.
  8. Injection valve according to one of Claims 3 to 7, characterized in that the valve seat body (12) is produced by way of metal powder injection moulding.
EP12716423.4A 2011-06-09 2012-04-24 Injection valve for internal combustion engines Not-in-force EP2718558B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011077268A DE102011077268A1 (en) 2011-06-09 2011-06-09 Injection valve for internal combustion engines
PCT/EP2012/057466 WO2012167990A1 (en) 2011-06-09 2012-04-24 Injection valve for internal combustion engines

Publications (2)

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EP2718558A1 EP2718558A1 (en) 2014-04-16
EP2718558B1 true EP2718558B1 (en) 2016-06-08

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EP12716423.4A Not-in-force EP2718558B1 (en) 2011-06-09 2012-04-24 Injection valve for internal combustion engines

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US (1) US20140224214A1 (en)
EP (1) EP2718558B1 (en)
JP (1) JP2014518986A (en)
CN (1) CN103582753A (en)
DE (1) DE102011077268A1 (en)
WO (1) WO2012167990A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5959892B2 (en) * 2012-03-26 2016-08-02 日立オートモティブシステムズ株式会社 Spark ignition type fuel injection valve
BR112015002197A2 (en) * 2012-08-01 2017-07-04 3M Innovative Properties Co aim the fuel outlet by off-axis nozzle steering
DE102014213101A1 (en) * 2014-07-07 2016-01-07 Robert Bosch Gmbh Valve component for an injection valve, injection valve and method for producing a valve component for an injection valve
US9790906B2 (en) * 2014-08-15 2017-10-17 Continental Automotive Systems, Inc. High pressure gasoline injector seat to reduce particle emissions
JP6023151B2 (en) 2014-11-07 2016-11-09 トヨタ自動車株式会社 Fuel injection valve

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2528915B1 (en) * 1982-06-18 1986-04-18 Semt FUEL INJECTOR AND INTERNAL COMBUSTION ENGINE PROVIDED WITH SAID INJECTOR
JPH0351172U (en) * 1989-09-25 1991-05-17
DE10118163B4 (en) * 2001-04-11 2007-04-19 Robert Bosch Gmbh Fuel injector
DE10204656A1 (en) * 2002-02-05 2003-09-25 Bosch Gmbh Robert Fuel injector
DE10219608A1 (en) * 2002-05-02 2003-11-20 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE10319694A1 (en) * 2003-05-02 2004-12-02 Robert Bosch Gmbh Fuel injector
DE10361762A1 (en) * 2003-12-29 2005-07-28 Robert Bosch Gmbh Fuel injector
DE102005036951A1 (en) * 2005-08-05 2007-02-08 Robert Bosch Gmbh Fuel injection valve and method for forming injection openings
DE102005036950A1 (en) * 2005-08-05 2007-02-08 Robert Bosch Gmbh Multiple part metallic molding, especially valve seat component for combustion engine injection valve, is obtained by multistage metal injection molding process allowing variation of properties of the parts
DE102007051408A1 (en) * 2007-10-25 2009-05-28 Prelatec Gmbh Method for drilling holes of defined geometries by means of laser radiation
JP4627783B2 (en) * 2008-03-31 2011-02-09 日立オートモティブシステムズ株式会社 Fuel injection valve and orifice machining method
JP5277056B2 (en) * 2009-04-10 2013-08-28 日立オートモティブシステムズ株式会社 Fuel injection valve
WO2010121767A1 (en) * 2009-04-20 2010-10-28 Prelatec Gmbh Nozzle having at least one spray hole for vaporizing fluids

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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DE102011077268A1 (en) 2012-12-13
WO2012167990A1 (en) 2012-12-13
EP2718558A1 (en) 2014-04-16
JP2014518986A (en) 2014-08-07
US20140224214A1 (en) 2014-08-14
CN103582753A (en) 2014-02-12

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