EP3159531A1 - Nozzle assembly for a fuel injection valve for injecting a gaseous and/or liquid fuel, fuel injection valve - Google Patents

Nozzle assembly for a fuel injection valve for injecting a gaseous and/or liquid fuel, fuel injection valve Download PDF

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Publication number
EP3159531A1
EP3159531A1 EP16184495.6A EP16184495A EP3159531A1 EP 3159531 A1 EP3159531 A1 EP 3159531A1 EP 16184495 A EP16184495 A EP 16184495A EP 3159531 A1 EP3159531 A1 EP 3159531A1
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EP
European Patent Office
Prior art keywords
injection valve
valve member
fuel
nozzle assembly
injection
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Granted
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EP16184495.6A
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German (de)
French (fr)
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EP3159531B1 (en
Inventor
Jochen Wessner
Martin Katz
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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
    • F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
    • F02M43/04—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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies

Definitions

  • the invention also relates to a fuel injector for injecting a gaseous and / or liquid fuel into a combustion chamber of an internal combustion engine having such a nozzle assembly.
  • fuel injectors are also known as dual fuel injectors or dual fuel injectors.
  • a dual fuel injector is known that is capable of selectively injecting two different fuels, such as diesel and liquefied natural gas.
  • the two-fuel injector comprises a first and a second valve needle.
  • the first valve needle on the lifting movement of the first injection holes are releasable and closable, is guided in the second valve needle liftable.
  • the second valve needle is designed for this purpose as a hollow needle.
  • About the second valve needle more spray holes are releasable or closed. All spray holes are formed in a nozzle body which surrounds the valve needles and at the same time forms a sealing seat for the two valve needles.
  • a fuel separator in the form of a sleeve is provided between the two valve needles, which is biased in the axial direction against the nozzle body. Furthermore, the injector has a hydraulic locking arrangement which is intended to counteract mixing. A minimal mixing takes place nevertheless.
  • the present invention has for its object to provide a nozzle assembly for a fuel injection valve for injecting a gaseous and / or a liquid fuel, in which all the beam-forming geometries are optimally matched or tuned. Furthermore, the nozzle assembly is to ensure a secure media separation.
  • the nozzle assembly is proposed with the features of claim 1. Advantageous developments of the invention can be found in the dependent claims. Further, a fuel injection valve is provided with such a nozzle assembly.
  • the nozzle assembly proposed for a fuel injection valve for injecting a gaseous and / or liquid fuel into a combustion chamber of an internal combustion engine comprises a needle-shaped first injection valve member which is designed to release and close at least one injection hole through which the liquid fuel can be injected in an at least partially hollow needle second injection valve member is guided in a liftable manner, wherein the second injection valve member has the outer peripheral side a sealing contour which cooperates with a sealing seat which is formed in a nozzle body surrounding the second injection valve member at least partially.
  • the nozzle body has a central opening, through which an end portion of the second injection valve member, in which the at least one injection hole is formed, is guided.
  • the guided through the opening of the nozzle body end portion of the second injection valve member may be formed in such a manner that it closes or limits the opening. If the opening is merely limited by the end section of the second injection valve member, a free opening cross section remains between the injection valve member and the nozzle body, via which the gaseous fuel can be injected. This means that the gaseous fuel does not necessarily have to be introduced via an injection hole into the combustion chamber of the internal combustion engine. However, if the opening is permanently closed by the end portion of the second injection valve member, at least one further injection hole for injecting the gaseous fuel is provided. This is then also formed in the end portion of the second injection valve member.
  • the guided through the central opening of the nozzle body end portion of the second injection valve member preferably forms a kind of cap, so that the at least partially formed as a hollow needle second injection valve member front, d. H. on the combustion chamber side, is closed.
  • the cap-like end of the second injection valve member assists effective media separation.
  • the end section of the second injection valve member preferably has a flow-guiding outer contour which extends over at least a partial circumferential area and which is arranged downstream of the sealing contour in the flow direction of the gaseous fuel.
  • the gaseous fuel is supplied via the formed in the nozzle body sealing seat of the flow-guiding outer contour of the injection valve member and deflected accordingly.
  • the gas stream can be deflected, for example, in the direction of an opening cross-section remaining between the injection valve member and the nozzle body or in the direction of at least one injection hole, so that the opening cross-section or injection hole are optimally flown.
  • the gaseous fuel is injected via a free opening cross-section between the injection valve member and the nozzle body, can also be taken on the design of the outer contour influence on the spray pattern.
  • the spray angle can be specified via the flow-directing outer contour.
  • the end section of the second injection valve member preferably forms a fuel collecting space, into which the at least one injection hole for introducing the liquid fuel opens.
  • the fuel plenum promotes uniform delivery of the liquid fuel into the combustion chamber. This is especially true if the fuel collecting space by a circumferential groove or a circumferential channel is trained.
  • the cross section of the groove or of the channel can be constant over the circumference or change.
  • the fuel collecting space is preferably arranged in the region of the flow-guiding outer contour of the end section of the second injection valve member. Accordingly, liquid and gaseous fuel accumulate in the fuel collecting space, but with a time offset from one another, since the two injection valve members are preferably opened in succession.
  • the flow-directing outer contour can therefore also be used for the flow guidance of the liquid fuel.
  • the fuel collecting space is connected directly to the combustion chamber.
  • the fuel collection chamber opens to the combustion chamber.
  • the fuel collecting space may be formed as a circumferential or at least over a partial circumferential region of the second injection valve member extending groove. It can also be provided several such grooves, which are preferably arranged at the same angular distance from each other.
  • the fuel collecting space is connected only indirectly via at least one further injection hole with the combustion chamber.
  • the further injection hole then serves to inject the gaseous and the liquid fuel.
  • the further injection hole is arranged coaxially with respect to the first injection hole, through which the liquid fuel passes into the fuel collecting space. The coaxial arrangement simplifies the production of the injection holes.
  • the specific embodiment of the end portion of the second injection valve member may therefore be decisive for the spray pattern of the gaseous and the liquid fuel. This is especially true when the fuel plenum is directly connected to the combustion chamber of the internal combustion engine.
  • a control edge is formed on the nozzle body, preferably in the region of the fuel collecting space formed in the second injection valve member. This causes the free opening cross section between the second injection valve member and the nozzle body in dependence changed from the stroke of the second injection valve member.
  • rate shaping and a variation of the penetration depth can be represented in a simple manner.
  • a sealing seat for the first injection valve member is formed in the end portion of the second injection valve member. This is preferably conically shaped, so that the first injection valve member automatically undergoes a centering.
  • the sealing seat formed in the nozzle body for the second injection valve member is also conically shaped. In this way, an automatic centering of the second injection valve member with respect to the nozzle body can be achieved.
  • the in the FIGS. 1a and 1b illustrated nozzle assembly comprises a nozzle body 7, which surrounds a first and a second injection valve member 2, 4 at least in sections.
  • the first injection valve member 2 is designed needle-shaped and received in a liftable manner in the second injection valve member 4.
  • the second injection valve member 4 is at least partially as a hollow needle for receiving the first injection valve member 2 executed.
  • the liquid fuel is passed through an annular space 14 remaining between the first and second injection valve members 2, 4.
  • the gaseous fuel is passed through an annular space 15 remaining between the second injection valve member 4 and the nozzle body 7.
  • the second injection valve member 4 has a cap-like end portion 9, which is guided through a central opening 8 of the nozzle body 7, so that the cap-like end portion 9 closes the opening 8.
  • a spray hole 3 is formed, via which the liquid fuel can be discharged.
  • the injection hole 3 is preceded by a sealing seat 13 for the first injection valve member 2, which is formed by a conically shaped inner peripheral surface of the second injection valve member 4.
  • the injection hole 3 opens into a fuel collection chamber 11, which is formed as a circumferential channel in the end portion 9 of the second injection valve member 4.
  • the fuel collection chamber 11 is in turn indirectly connected via at least one further injection hole 12 with a combustion chamber 1 of an internal combustion engine.
  • the liquid fuel is thus injected via the spray hole 3, the fuel collection chamber 11 and the injection hole 12 into the combustion chamber 1.
  • the injection holes 3 and 12 are arranged coaxially thereto.
  • the fuel collecting space 11 opens via a flow-directing outer contour 10 in the direction of a sealing seat 6, which is formed in the nozzle body 7 for the second injection valve member 4.
  • the flow-guiding outer contour 10 is adjoined by a sealing contour 5, which interacts with the sealing seat 6. If the second injection valve member 4 opens, gaseous fuel flows via the sealing seat 6 into the fuel collecting space 11.
  • the gas flow is supplied to the injection hole 12 via the flow-directing outer contour 10, which extends into the fuel collecting space 11.
  • the gaseous fuel is finally injected into the combustion chamber 1 of the internal combustion engine (see Fig. 1b ).
  • FIGS. 2a and 2b is a modification of a nozzle assembly according to the invention can be seen.
  • This eliminates the at least one additional injection hole 12, the Combustion fuel chamber 11 connects with the combustion chamber 1. Instead, the connection is made via a free opening cross-section remaining between the second injection valve member 4 and the nozzle body 7 in the region of the central opening 8 formed in the nozzle body 7.
  • the fuel collection chamber 11 is designed as a circumferential groove which opens toward the combustion chamber 1.
  • a control edge 16 is also formed, which is arranged at the level of the fuel collecting space 11, so that the free opening cross section changes depending on the stroke of the second injection valve member 4. This means that the gas mass flow varies depending on the stroke. Because with progressive stroke of the second injection valve member 4, the remaining between the injection valve member 4 and the nozzle body 7 remaining free opening cross-section decreases.
  • FIGS. 1 and 2 Nozzle assemblies shown represent only two preferred embodiments of the invention. Further modifications are possible, which relate in particular to the design of the end portion 8 of the second injection valve member 4.

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

Abstract

Die Erfindung betrifft eine Düsenbaugruppe für ein Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs in einen Brennraum (1) einer Brennkraftmaschine, umfassend ein nadelförmiges erstes Einspritzventilglied (2), das zum Freigeben und Verschließen mindestens eines Spritzlochs (3), über das der flüssige Brennstoff einspritzbar ist, in einem zumindest abschnittsweise als Hohlnadel ausgebildeten zweiten Einspritzventilglied (4) hubbeweglich geführt ist, wobei das zweite Einspritzventilglied (4) außenumfangseitig eine Dichtkontur (5) aufweist, die mit einem Dichtsitz (6) zusammenwirkt, der in einem das zweite Einspritzventilglied (4) zumindest abschnittsweise umgebenden Düsenkörper (7) ausgebildet ist. Erfindungsgemäß weist der Düsenkörper (7) eine zentrale Öffnung (8) auf, durch die ein Endabschnitt (9) des zweiten Einspritzventilglieds (4), in dem das mindestens eine Spritzloch (3) ausgebildet ist, geführt ist. Ferner betrifft die Erfindung ein Brennstoffeinspritzventil mit einer solchen Düsenbaugruppe.The invention relates to a nozzle assembly for a fuel injection valve for injecting a gaseous and / or liquid fuel into a combustion chamber (1) of an internal combustion engine, comprising a needle-shaped first injection valve member (2) for releasing and closing at least one injection hole (3) via which liquid fuel is injectable, in a at least partially formed as a hollow needle second injection valve member (4) is guided in a liftable manner, wherein the second injection valve member (4) has a sealing contour (5) on the outer circumference, which cooperates with a sealing seat (6) in one the second Injection valve member (4) at least partially surrounding nozzle body (7) is formed. According to the invention, the nozzle body (7) has a central opening (8), through which an end portion (9) of the second injection valve member (4), in which the at least one injection hole (3) is formed, is guided. Furthermore, the invention relates to a fuel injection valve with such a nozzle assembly.

Description

Die Erfindung betrifft eine Düsenbaugruppe für ein Brennstoffeinspritzventil mit den Merkmalen des Oberbegriffs des Anspruchs 1. Ferner betrifft die Erfindung ein Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs in einen Brennraum einer Brennkraftmaschine mit einer solchen Düsenbaugruppe. Derartige Brennstoffeinspritzventile sind auch als Zweikraftstoffinjektoren oder Dual-Fuel-Injektoren bekannt.The invention also relates to a fuel injector for injecting a gaseous and / or liquid fuel into a combustion chamber of an internal combustion engine having such a nozzle assembly. Such fuel injectors are also known as dual fuel injectors or dual fuel injectors.

Stand der TechnikState of the art

Aus der Offenlegungsschrift DE 10 2012 012 450 A1 ist beispielhaft ein Zweikraftstoffinjektor bekannt, der in der Lage ist, selektiv zwei unterschiedliche Kraftstoffe wie Diesel und Flüssigerdgas einzuspritzen. Hierzu umfasst der Zweikraftstoffinjektor eine erste und eine zweite Ventilnadel. Die erste Ventilnadel, über deren Hubbewegung erste Spritzlöcher freigebbar und verschließbar sind, ist in der zweiten Ventilnadel hubbeweglich geführt. Die zweite Ventilnadel ist hierzu als Hohlnadel ausgebildet. Über die zweite Ventilnadel sind weitere Spritzlöcher freigebbar bzw. verschließbar. Sämtliche Spritzlöcher sind in einem Düsenkörper ausgebildet, der die Ventilnadeln umgibt und zugleich jeweils einen Dichtsitz für die beiden Ventilnadeln ausbildet. Um die beiden Kraftstoffe voneinander zu trennen, ist zwischen den beiden Ventilnadeln ein Kraftstoffseparator in Form einer Hülse vorgesehen, die in axialer Richtung gegen den Düsenkörper vorgespannt ist. Ferner weist der Injektor eine Hydraulikverriegelungsanordnung auf, die einer Vermischung entgegen wirken soll. Eine minimale Vermischung findet dennoch statt.From the publication DE 10 2012 012 450 A1 By way of example, a dual fuel injector is known that is capable of selectively injecting two different fuels, such as diesel and liquefied natural gas. For this purpose, the two-fuel injector comprises a first and a second valve needle. The first valve needle, on the lifting movement of the first injection holes are releasable and closable, is guided in the second valve needle liftable. The second valve needle is designed for this purpose as a hollow needle. About the second valve needle more spray holes are releasable or closed. All spray holes are formed in a nozzle body which surrounds the valve needles and at the same time forms a sealing seat for the two valve needles. In order to separate the two fuels, a fuel separator in the form of a sleeve is provided between the two valve needles, which is biased in the axial direction against the nozzle body. Furthermore, the injector has a hydraulic locking arrangement which is intended to counteract mixing. A minimal mixing takes place nevertheless.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Düsenbaugruppe für ein Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder eines flüssigen Brennstoffs anzugeben, bei welcher sämtliche strahlbildenden Geometrien optimal aufeinander abstimmbar bzw. abgestimmt sind. Ferner soll die Düsenbaugruppe eine sichere Medientrennung gewährleisten.The present invention has for its object to provide a nozzle assembly for a fuel injection valve for injecting a gaseous and / or a liquid fuel, in which all the beam-forming geometries are optimally matched or tuned. Furthermore, the nozzle assembly is to ensure a secure media separation.

Zur Lösung der Aufgabe wird die Düsenbaugruppe mit den Merkmalen des Anspruchs 1 vorgeschlagen. Vorteilhafte Weiterbildungen der Erfindung sind den Unteransprüchen zu entnehmen. Ferner wird ein Brennstoffeinspritzventil mit einer solchen Düsenbaugruppe angegeben.To solve the problem, the nozzle assembly is proposed with the features of claim 1. Advantageous developments of the invention can be found in the dependent claims. Further, a fuel injection valve is provided with such a nozzle assembly.

Offenbarung der ErfindungDisclosure of the invention

Die für ein Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs in einen Brennraum einer Brennkraftmaschine vorgeschlagene Düsenbaugruppe umfasst ein nadelförmiges erstes Einspritzventilglied, das zum Freigeben und Verschließen mindestens eines Spritzlochs, über das der flüssige Brennstoff einspritzbar ist, in einem zumindest abschnittsweise als Hohlnadel ausgebildeten zweiten Einspritzventilglied hubbeweglich geführt ist, wobei das zweite Einspritzventilglied außenumfangseitig eine Dichtkontur aufweist, die mit einem Dichtsitz zusammenwirkt, der in einem das zweite Einspritzventilglied zumindest abschnittsweise umgebenden Düsenkörper ausgebildet ist. Erfindungsgemäß weist der Düsenkörper eine zentrale Öffnung auf, durch die ein Endabschnitt des zweiten Einspritzventilglieds, in dem das mindestens eine Spritzloch ausgebildet ist, geführt ist.The nozzle assembly proposed for a fuel injection valve for injecting a gaseous and / or liquid fuel into a combustion chamber of an internal combustion engine comprises a needle-shaped first injection valve member which is designed to release and close at least one injection hole through which the liquid fuel can be injected in an at least partially hollow needle second injection valve member is guided in a liftable manner, wherein the second injection valve member has the outer peripheral side a sealing contour which cooperates with a sealing seat which is formed in a nozzle body surrounding the second injection valve member at least partially. According to the invention, the nozzle body has a central opening, through which an end portion of the second injection valve member, in which the at least one injection hole is formed, is guided.

Der durch die Öffnung des Düsenkörpers geführte Endabschnitt des zweiten Einspritzventilglieds kann in der Weise ausgebildet sein, dass er die Öffnung verschließt oder begrenzt. Wird die Öffnung durch den Endabschnitt des zweiten Einspritzventilglieds lediglich begrenzt, verbleibt ein freier Öffnungsquerschnitt zwischen dem Einspritzventilglied und dem Düsenkörper, über den der gasförmige Brennstoff einspritzbar ist. Das heißt, dass der gasförmige Brennstoff nicht zwingend über ein Spritzloch in den Brennraum der Brennkraftmaschine eingebracht werden muss. Wird die Öffnung durch den Endabschnitt des zweiten Einspritzventilglieds jedoch dauerhaft verschlossen, ist mindestens ein weiteres Spritzloch zum Einspritzen des gasförmigen Brennstoffs vorzusehen. Dieses ist dann ebenfalls im Endabschnitt des zweiten Einspritzventilglieds ausgebildet.The guided through the opening of the nozzle body end portion of the second injection valve member may be formed in such a manner that it closes or limits the opening. If the opening is merely limited by the end section of the second injection valve member, a free opening cross section remains between the injection valve member and the nozzle body, via which the gaseous fuel can be injected. This means that the gaseous fuel does not necessarily have to be introduced via an injection hole into the combustion chamber of the internal combustion engine. However, if the opening is permanently closed by the end portion of the second injection valve member, at least one further injection hole for injecting the gaseous fuel is provided. This is then also formed in the end portion of the second injection valve member.

Das heißt, dass - unabhängig von der konkreten Ausgestaltung des Endabschnitts des zweiten Einspritzventilglieds - im Wesentlichen alle strahlbildenden Geometrien an einem Bauteil ausgebildet sind, und zwar am zweiten Einspritzventilglied. Dies ermöglicht eine optimale Abstimmung der strahlbildenden Geometrien aufeinander.This means that - regardless of the specific configuration of the end portion of the second injection valve member - substantially all the beam-forming geometries are formed on a component, namely on the second injection valve member. This enables optimum matching of the beam-forming geometries to one another.

Der durch die zentrale Öffnung des Düsenkörpers geführte Endabschnitt des zweiten Einspritzventilglieds bildet vorzugsweise eine Art Kappe aus, so dass das zumindest abschnittsweise als Hohlnadel ausgebildete zweite Einspritzventilglied vorne, d. h. brennraumseitig, geschlossen ist. Das kappenartige Ende des zweiten Einspritzventilglieds unterstützt eine wirksame Medientrennung.The guided through the central opening of the nozzle body end portion of the second injection valve member preferably forms a kind of cap, so that the at least partially formed as a hollow needle second injection valve member front, d. H. on the combustion chamber side, is closed. The cap-like end of the second injection valve member assists effective media separation.

Bevorzugt weist der Endabschnitt des zweiten Einspritzventilglieds eine sich zumindest über einen Teilumfangsbereich ersteckende, strömungslenkende Außenkontur auf, die in Strömungsrichtung des gasförmigen Brennstoffs stromabwärts der Dichtkontur angeordnet ist. Öffnet das zweite Einspritzventilglied, wird der gasförmige Brennstoff über den im Düsenkörper ausgebildeten Dichtsitz der strömungslenkenden Außenkontur des Einspritzventilglieds zugeführt und entsprechend umgelenkt. Der Gasstrom kann beispielsweise in Richtung eines zwischen dem Einspritzventilglied und dem Düsenkörper verbleibenden Öffnungsquerschnitts oder in Richtung mindestens eines Spritzlochs umgelenkt werden, so dass Öffnungsquerschnitt oder Spritzloch optimal angeströmt werden. Sofern der gasförmige Brennstoff über einen freien Öffnungsquerschnitt zwischen dem Einspritzventilglied und dem Düsenkörper eingespritzt wird, kann über die Gestaltung der Außenkontur ferner Einfluss auf das Spritzbild genommen werden. Beispielsweise kann der Spritzwinkel über die strömungslenkende Außenkontur vorgegeben werden.The end section of the second injection valve member preferably has a flow-guiding outer contour which extends over at least a partial circumferential area and which is arranged downstream of the sealing contour in the flow direction of the gaseous fuel. Opens the second injection valve member, the gaseous fuel is supplied via the formed in the nozzle body sealing seat of the flow-guiding outer contour of the injection valve member and deflected accordingly. The gas stream can be deflected, for example, in the direction of an opening cross-section remaining between the injection valve member and the nozzle body or in the direction of at least one injection hole, so that the opening cross-section or injection hole are optimally flown. If the gaseous fuel is injected via a free opening cross-section between the injection valve member and the nozzle body, can also be taken on the design of the outer contour influence on the spray pattern. For example, the spray angle can be specified via the flow-directing outer contour.

Des Weiteren bevorzugt bildet der Endabschnitt des zweiten Einspritzventilglieds einen Brennstoffsammelraum aus, in den das mindestens eine Spritzloch zum Einbringen des flüssigen Brennstoffs mündet. Der Brennstoffsammelraum fördert eine gleichmäßige Abgabe des flüssigen Brennstoffs in den Brennraum. Dies gilt insbesondere, wenn der Brennstoffsammelraum durch eine umlaufende Nut oder einen umlaufenden Kanal ausgebildet wird. Der Querschnitt der Nut bzw. des Kanals kann dabei über den Umfang gleichbleibend sein oder sich verändern.Furthermore, the end section of the second injection valve member preferably forms a fuel collecting space, into which the at least one injection hole for introducing the liquid fuel opens. The fuel plenum promotes uniform delivery of the liquid fuel into the combustion chamber. This is especially true if the fuel collecting space by a circumferential groove or a circumferential channel is trained. The cross section of the groove or of the channel can be constant over the circumference or change.

Der Brennstoffsammelraum ist vorzugsweise im Bereich der strömungslenkenden Außenkontur des Endabschnitts des zweiten Einspritzventilglieds angeordnet. Im Brennstoffsammelraum sammeln sich demnach flüssiger und gasförmiger Brennstoff, allerdings zeitlich versetzt zueinander, da die beiden Einspritzventilglieder bevorzugt nacheinander geöffnet werden. Die strömungslenkende Außenkontur kann demnach auch zur Strömungslenkung des flüssigen Brennstoffs genutzt werden.The fuel collecting space is preferably arranged in the region of the flow-guiding outer contour of the end section of the second injection valve member. Accordingly, liquid and gaseous fuel accumulate in the fuel collecting space, but with a time offset from one another, since the two injection valve members are preferably opened in succession. The flow-directing outer contour can therefore also be used for the flow guidance of the liquid fuel.

Zur Optimierung der Strömungslenkung wird vorgeschlagen, dass der Brennstoffsammelraum unmittelbar mit dem Brennraum verbunden ist. Das heißt, dass sich der Brennstoffsammelraum zum Brennraum hin öffnet. Hierzu kann beispielsweise der Brennstoffsammelraum als umlaufende oder sich zumindest über einen Teilumfangsbereich des zweiten Einspritzventilglieds erstreckende Nut ausgebildet sein. Es können auch mehrere solcher Nuten vorgesehen sein, die vorzugsweise in gleichem Winkelabstand zueinander angeordnet sind.To optimize the flow control, it is proposed that the fuel collecting space is connected directly to the combustion chamber. This means that the fuel collection chamber opens to the combustion chamber. For this purpose, for example, the fuel collecting space may be formed as a circumferential or at least over a partial circumferential region of the second injection valve member extending groove. It can also be provided several such grooves, which are preferably arranged at the same angular distance from each other.

Alternativ kann vorgesehen sein, dass der Brennstoffsammelraum lediglich mittelbar über mindestens ein weiteres Spritzloch mit dem Brennraum verbunden ist. Das weitere Spritzloch dient dann dem Einspritzen des gasförmigen und des flüssigen Brennstoffs. Vorzugsweise ist das weitere Spritzloch koaxial in Bezug auf das erste Spritzloch angeordnet, über welches der flüssige Brennstoff in den Brennstoffsammelraum gelangt. Die koaxiale Anordnung vereinfacht die Fertigung der Spritzlöcher.Alternatively it can be provided that the fuel collecting space is connected only indirectly via at least one further injection hole with the combustion chamber. The further injection hole then serves to inject the gaseous and the liquid fuel. Preferably, the further injection hole is arranged coaxially with respect to the first injection hole, through which the liquid fuel passes into the fuel collecting space. The coaxial arrangement simplifies the production of the injection holes.

Die konkrete Ausgestaltung des Endabschnitts des zweiten Einspritzventilglieds kann demnach entscheidend für das Spritzbild des gasförmigen und des flüssigen Brennstoffs sein. Dies gilt insbesondere, wenn der Brennstoffsammelraum unmittelbar mit dem Brennraum der Brennkraftmaschine verbunden ist.The specific embodiment of the end portion of the second injection valve member may therefore be decisive for the spray pattern of the gaseous and the liquid fuel. This is especially true when the fuel plenum is directly connected to the combustion chamber of the internal combustion engine.

In Weiterbildung der Erfindung wird vorgeschlagen, dass am Düsenkörper, vorzugsweise im Bereich des im zweiten Einspritzventilglied ausgebildeten Brennstoffsammelraums, eine Steuerkante ausgebildet ist. Diese bewirkt, dass sich der freie Öffnungsquerschnitt zwischen dem zweiten Einspritzventilglied und dem Düsenkörper in Abhängigkeit vom Hub des zweiten Einspritzventilglieds verändert. Über den sich hubabhängig verändernden freien Öffnungsquerschnitt lassen sich in einfacher Weise eine Ratenformung und eine Variation der Eindringtiefe darstellen.In a further development of the invention, it is proposed that a control edge is formed on the nozzle body, preferably in the region of the fuel collecting space formed in the second injection valve member. This causes the free opening cross section between the second injection valve member and the nozzle body in dependence changed from the stroke of the second injection valve member. By way of the free opening cross-section, which varies as a function of the stroke, rate shaping and a variation of the penetration depth can be represented in a simple manner.

Ferner bevorzugt ist im Endabschnitt des zweiten Einspritzventilglieds ein Dichtsitz für das erste Einspritzventilglied ausbildet. Dieser ist vorzugsweise konisch geformt, so dass das erste Einspritzventilglied automatisch eine Zentrierung erfährt.Further preferably, a sealing seat for the first injection valve member is formed in the end portion of the second injection valve member. This is preferably conically shaped, so that the first injection valve member automatically undergoes a centering.

Vorteilhafterweise ist der im Düsenkörper für das zweite Einspritzventilglied ausgebildete Dichtsitz ebenfalls konisch geformt. Auf diese Weise kann eine automatische Zentrierung des zweiten Einspritzventilglieds in Bezug auf den Düsenkörper erreicht werden.Advantageously, the sealing seat formed in the nozzle body for the second injection valve member is also conically shaped. In this way, an automatic centering of the second injection valve member with respect to the nozzle body can be achieved.

Da die Vorteile der Erfindung insbesondere bei einem Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs in einen Brennraum einer Brennkraftmaschine zum Tragen kommen, wird darüber hinaus ein solches Brennstoffeinspritzventil mit einer erfindungsgemäßen Düsenbaugruppe vorgeschlagen.Since the advantages of the invention, in particular in a fuel injection valve for injecting a gaseous and / or liquid fuel into a combustion chamber of an internal combustion engine come to fruition, such a fuel injection valve is proposed with a nozzle assembly according to the invention.

Bevorzugte Ausführungsformen einer erfindungsgemäßen Düsenbaugruppe werden nachfolgend anhand der beigefügten Zeichnungen näher erläutert. Diese zeigen:

  • Fig. 1 einen schematischen Längsschnitt durch eine erste erfindungsgemäße Düsenbaugruppe, a) in geschlossenem Zustand, b) in geöffnetem Zustand, und
  • Fig. 2 einen schematischen Längsschnitt durch eine zweite erfindungsgemäße Düsenbaugruppe, a) in geschlossenem Zustand, b) in geöffnetem Zustand.
Preferred embodiments of a nozzle assembly according to the invention are described below with reference to the accompanying drawings. These show:
  • Fig. 1 a schematic longitudinal section through a first nozzle assembly according to the invention, a) in the closed state, b) in the open state, and
  • Fig. 2 a schematic longitudinal section through a second nozzle assembly according to the invention, a) in the closed state, b) in the open state.

Ausführliche Beschreibung der ZeichnungenDetailed description of the drawings

Die in den Figuren 1a und 1b dargestellte Düsenbaugruppe umfasst einen Düsenkörper 7, der ein erstes und ein zweites Einspritzventilglied 2, 4 zumindest abschnittsweise umgibt. Das erste Einspritzventilglied 2 ist nadelförmig ausgeführt und im zweiten Einspritzventilglied 4 hubbeweglich aufgenommen. Das zweite Einspritzventilglied 4 ist zur Aufnahme des ersten Einspritzventilglieds 2 zumindest abschnittsweise als Hohlnadel ausgeführt. Der flüssige Brennstoff wird über einen zwischen dem ersten und dem zweiten Einspritzventilglied 2, 4 verbleibenden Ringraum 14 geführt. Der gasförmige Brennstoff wird über einen zwischen dem zweiten Einspritzventilglied 4 und dem Düsenkörper 7 verbleibenden Ringraum 15 geführt.The in the FIGS. 1a and 1b illustrated nozzle assembly comprises a nozzle body 7, which surrounds a first and a second injection valve member 2, 4 at least in sections. The first injection valve member 2 is designed needle-shaped and received in a liftable manner in the second injection valve member 4. The second injection valve member 4 is at least partially as a hollow needle for receiving the first injection valve member 2 executed. The liquid fuel is passed through an annular space 14 remaining between the first and second injection valve members 2, 4. The gaseous fuel is passed through an annular space 15 remaining between the second injection valve member 4 and the nozzle body 7.

Das zweite Einspritzventilglied 4 weist einen kappenartigen Endabschnitt 9 auf, der durch eine zentrale Öffnung 8 des Düsenkörpers 7 geführt ist, so dass der kappenartige Endabschnitt 9 die Öffnung 8 verschließt.The second injection valve member 4 has a cap-like end portion 9, which is guided through a central opening 8 of the nozzle body 7, so that the cap-like end portion 9 closes the opening 8.

Im kappenartigen Endabschnitt 9 ist ein Spritzloch 3 ausgebildet, über welches der flüssige Brennstoff austragbar ist. Dem Spritzloch 3 ist ein Dichtsitz 13 für das erste Einspritzventilglied 2 vorgelagert, der durch eine konisch geformte Innenumfangsfläche des zweiten Einspritzventilglieds 4 ausgebildet wird.In the cap-like end portion 9, a spray hole 3 is formed, via which the liquid fuel can be discharged. The injection hole 3 is preceded by a sealing seat 13 for the first injection valve member 2, which is formed by a conically shaped inner peripheral surface of the second injection valve member 4.

Das Spritzloch 3 mündet in einen Brennstoffsammelraum 11, der als umlaufender Kanal im Endabschnitt 9 des zweiten Einspritzventilglieds 4 ausgebildet ist. Der Brennstoffsammelraum 11 ist wiederum mittelbar über mindestens ein weiteres Spritzloch 12 mit einem Brennraum 1 einer Brennkraftmaschine verbunden. Der flüssige Brennstoff wird demnach über das Spritzloch 3, den Brennstoffsammelraum 11 und das Spritzloch 12 in den Brennraum 1 eingespritzt. Die Spritzlöcher 3 und 12 sind hierzu koaxial angeordnet.The injection hole 3 opens into a fuel collection chamber 11, which is formed as a circumferential channel in the end portion 9 of the second injection valve member 4. The fuel collection chamber 11 is in turn indirectly connected via at least one further injection hole 12 with a combustion chamber 1 of an internal combustion engine. The liquid fuel is thus injected via the spray hole 3, the fuel collection chamber 11 and the injection hole 12 into the combustion chamber 1. The injection holes 3 and 12 are arranged coaxially thereto.

Der Brennstoffsammelraum 11 öffnet sich über eine strömungslenkende Außenkontur 10 in Richtung eines Dichtsitzes 6, der im Düsenkörper 7 für das zweite Einspritzventilglied 4 ausgebildet ist. An die strömungslenkende Außenkontur 10 schließt sich eine Dichtkontur 5 an, die mit dem Dichtsitz 6 zusammenwirkt. Öffnet das zweite Einspritzventilglied 4, strömt gasförmiger Brennstoff über den Dichtsitz 6 in den Brennstoffsammelraum 11. Der Gasstrom wird dabei über die strömungslenkende Außenkontur 10, die sich bis in den Brennstoffsammelraum 11 hinein erstreckt, dem Spritzloch 12 zugeführt. Über das Spritzloch 12 wird der gasförmige Brennstoff schließlich in den Brennraum 1 der Brennkraftmaschine eingespritzt (siehe Fig. 1b).The fuel collecting space 11 opens via a flow-directing outer contour 10 in the direction of a sealing seat 6, which is formed in the nozzle body 7 for the second injection valve member 4. The flow-guiding outer contour 10 is adjoined by a sealing contour 5, which interacts with the sealing seat 6. If the second injection valve member 4 opens, gaseous fuel flows via the sealing seat 6 into the fuel collecting space 11. The gas flow is supplied to the injection hole 12 via the flow-directing outer contour 10, which extends into the fuel collecting space 11. Via the injection hole 12, the gaseous fuel is finally injected into the combustion chamber 1 of the internal combustion engine (see Fig. 1b ).

Den Figuren 2a und 2b ist eine Abwandlung einer erfindungsgemäßen Düsenbaugruppe zu entnehmen. Hier entfällt das mindestens eine weitere Spritzloch 12, das den Brennstoffsammelraum 11 mit dem Brennraum 1 verbindet. Die Verbindung erfolgt stattdessen über einen zwischen dem zweiten Einspritzventilglied 4 und dem Düsenkörper 7 verbleibenden freien Öffnungsquerschnitt im Bereich der im Düsenkörper 7 ausgebildeten zentralen Öffnung 8. Der Brennstoffsammelraum 11 ist hierzu als umlaufende Nut ausgebildet, die sich zum Brennraum 1 hin öffnet. Am Düsenkörper 7 ist zudem eine Steuerkante 16 ausgebildet, die auf Höhe des Brennstoffsammelraums 11 angeordnet ist, so dass sich der freie Öffnungsquerschnitt in Abhängigkeit vom Hub des zweiten Einspritzventilglieds 4 verändert. Das heißt, dass der Gasmassenstrom hubabhängig variiert. Denn mit fortschreitendem Hub des zweiten Einspritzventilglieds 4 verringert sich der zwischen dem Einspritzventilglied 4 und dem Düsenkörper 7 verbleibende freie Öffnungsquerschnitt.The FIGS. 2a and 2b is a modification of a nozzle assembly according to the invention can be seen. This eliminates the at least one additional injection hole 12, the Combustion fuel chamber 11 connects with the combustion chamber 1. Instead, the connection is made via a free opening cross-section remaining between the second injection valve member 4 and the nozzle body 7 in the region of the central opening 8 formed in the nozzle body 7. For this purpose, the fuel collection chamber 11 is designed as a circumferential groove which opens toward the combustion chamber 1. On the nozzle body 7, a control edge 16 is also formed, which is arranged at the level of the fuel collecting space 11, so that the free opening cross section changes depending on the stroke of the second injection valve member 4. This means that the gas mass flow varies depending on the stroke. Because with progressive stroke of the second injection valve member 4, the remaining between the injection valve member 4 and the nozzle body 7 remaining free opening cross-section decreases.

Die in den Figuren 1 und 2 dargestellten Düsenbaugruppen stellen lediglich zwei bevorzugte Ausführungsformen der Erfindung dar. Weitere Abwandlungen sind möglich, die insbesondere die Ausgestaltung des Endabschnitts 8 des zweiten Einspritzventilglieds 4 betreffen.The in the FIGS. 1 and 2 Nozzle assemblies shown represent only two preferred embodiments of the invention. Further modifications are possible, which relate in particular to the design of the end portion 8 of the second injection valve member 4.

Claims (8)

Düsenbaugruppe für ein Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs in einen Brennraum (1) einer Brennkraftmaschine, umfassend ein nadelförmiges erstes Einspritzventilglied (2), das zum Freigeben und Verschließen mindestens eines Spritzlochs (3), über das der flüssige Brennstoff einspritzbar ist, in einem zumindest abschnittsweise als Hohlnadel ausgebildeten zweiten Einspritzventilglied (4) hubbeweglich geführt ist, wobei das zweite Einspritzventilglied (4) außenumfangseitig eine Dichtkontur (5) aufweist, die mit einem Dichtsitz (6) zusammenwirkt, der in einem das zweite Einspritzventilglied (4) zumindest abschnittsweise umgebenden Düsenkörper (7) ausgebildet ist,
dadurch gekennzeichnet, dass der Düsenkörper (7) eine zentrale Öffnung (8) aufweist, durch die ein Endabschnitt (9) des zweiten Einspritzventilglieds (4), in dem das mindestens eine Spritzloch (3) ausgebildet ist, geführt ist.A nozzle assembly for a fuel injector for injecting a gaseous and / or liquid fuel into a combustion chamber (1) of an internal combustion engine, comprising a needle-shaped first injection valve member (2) for releasing and closing at least one injection hole (3) through which the liquid fuel is injectable , in which the second injection valve member (4) has a sealing contour (5) on the outer circumference, which cooperates with a sealing seat (6) which is in a second injection valve member (4). at least partially surrounding nozzle body (7) is formed,
characterized in that the nozzle body (7) has a central opening (8) through which an end portion (9) of the second injection valve member (4), in which the at least one injection hole (3) is formed, is guided. Düsenbaugruppe nach Anspruch 1,
dadurch gekennzeichnet, dass der Endabschnitt (9) des zweiten Einspritzventilglieds (4) eine sich zumindest über einen Teilumfangsbereich erstreckende, strömungslenkende Außenkontur (10) aufweist, die in Strömungsrichtung des gasförmigen Brennstoffs stromabwärts der Dichtkontur (5) angeordnet ist.Nozzle assembly according to claim 1,
characterized in that the end portion (9) of the second injection valve member (4) has an at least over a partial circumferential area extending, flow-guiding outer contour (10) which is arranged in the flow direction of the gaseous fuel downstream of the sealing contour (5). Düsenbaugruppe nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass der Endabschnitt (9) des zweiten Einspritzventilglieds (4), vorzugsweise im Bereich der strömungslenkenden Außenkontur (10), einen Brennstoffsammelraum (11) ausbildet, in den das Spritzloch (3) mündet.Nozzle assembly according to claim 1 or 2,
characterized in that the end portion (9) of the second injection valve member (4), preferably in the region of the flow-directing outer contour (10), forms a fuel collecting space (11) into which the injection hole (3) opens. Düsenbaugruppe nach Anspruch 3,
dadurch gekennzeichnet, dass der Brennstoffsammelraum (11) unmittelbar oder mittelbar über mindestens ein weiteres Spritzloch (12), das vorzugsweise koaxial in Bezug auf das erste Spritzloch (3) angeordnet ist, mit dem Brennraum (1) verbunden ist.Nozzle assembly according to claim 3,
characterized in that the fuel collecting space (11) directly or indirectly via at least one further injection hole (12), which is preferably arranged coaxially with respect to the first injection hole (3), with the combustion chamber (1). Düsenbaugruppe nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass am Düsenkörper (7) eine Steuerkante (16) ausgebildet ist, die vorzugsweise im Bereich des im zweiten Einspritzventilglieds (4) ausgebildeten Brennstoffsammelraums (11) angeordnet ist.Nozzle assembly according to one of the preceding claims,
characterized in that on the nozzle body (7) a control edge (16) is formed, which is preferably arranged in the region of the second injection valve member (4) formed in the fuel accumulation chamber (11). Düsenbaugruppe nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass im Endabschnitt (8) des zweiten Einspritzventilglieds (4) ein Dichtsitz (13) für das erste Einspritzventilglied (2) ausbildet ist, der vorzugsweise konisch geformt ist.Nozzle assembly according to one of the preceding claims,
characterized in that in the end portion (8) of the second injection valve member (4) a sealing seat (13) for the first injection valve member (2) is formed, which is preferably conically shaped. Düsenbaugruppe nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der im Düsenkörper (7) für das zweite Einspritzventilglied (4) ausgebildete Dichtsitz (6) konisch geformt ist.Nozzle assembly according to one of the preceding claims,
characterized in that in the nozzle body (7) for the second injection valve member (4) formed sealing seat (6) is conically shaped. Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs in einen Brennraum (1) einer Brennkraftmaschine mit einer Düsenbaugruppe nach einem der vorhergehenden Ansprüche.Fuel injection valve for injecting a gaseous and / or liquid fuel into a combustion chamber (1) of an internal combustion engine having a nozzle assembly according to one of the preceding claims.
EP16184495.6A 2015-10-20 2016-08-17 Nozzle assembly for a fuel injection valve for injecting a gaseous and/or liquid fuel, fuel injection valve Active EP3159531B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10563597B2 (en) 2017-11-16 2020-02-18 Caterpillar Inc. Fuel injector
US10563609B2 (en) 2017-11-16 2020-02-18 Caterpillar Inc. Fuel injector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017214516A1 (en) 2017-08-21 2019-02-21 Robert Bosch Gmbh Injector for dosing gaseous and liquid fuel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60166749A (en) * 1984-02-08 1985-08-30 Mitsubishi Heavy Ind Ltd Fuel injection valve
US5458292A (en) * 1994-05-16 1995-10-17 General Electric Company Two-stage fuel injection nozzle
DE102012012450A1 (en) 2011-06-24 2012-12-27 Caterpillar Inc. Two-fuel injector for a common-rail system
WO2014186892A1 (en) * 2013-05-21 2014-11-27 Westport Power Inc. Fuel injector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60166749A (en) * 1984-02-08 1985-08-30 Mitsubishi Heavy Ind Ltd Fuel injection valve
US5458292A (en) * 1994-05-16 1995-10-17 General Electric Company Two-stage fuel injection nozzle
DE102012012450A1 (en) 2011-06-24 2012-12-27 Caterpillar Inc. Two-fuel injector for a common-rail system
WO2014186892A1 (en) * 2013-05-21 2014-11-27 Westport Power Inc. Fuel injector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10563597B2 (en) 2017-11-16 2020-02-18 Caterpillar Inc. Fuel injector
US10563609B2 (en) 2017-11-16 2020-02-18 Caterpillar Inc. Fuel injector

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DE102015220410A1 (en) 2017-04-20

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