WO2022207287A1 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

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Publication number
WO2022207287A1
WO2022207287A1 PCT/EP2022/056476 EP2022056476W WO2022207287A1 WO 2022207287 A1 WO2022207287 A1 WO 2022207287A1 EP 2022056476 W EP2022056476 W EP 2022056476W WO 2022207287 A1 WO2022207287 A1 WO 2022207287A1
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WO
WIPO (PCT)
Prior art keywords
injection valve
fuel
valve member
opening
injection
Prior art date
Application number
PCT/EP2022/056476
Other languages
German (de)
French (fr)
Inventor
Alexander Fuchs
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2022207287A1 publication Critical patent/WO2022207287A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0248—Injectors
    • F02M21/0251—Details of actuators therefor
    • F02M21/0254—Electric actuators, e.g. solenoid or piezoelectric
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0248—Injectors
    • F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
    • F02M21/026—Lift valves, i.e. stem operated valves
    • F02M21/0263—Inwardly opening single or multi nozzle valves, e.g. needle valves
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0248—Injectors
    • F02M21/0275—Injectors for in-cylinder direct injection, e.g. injector combined with spark plug
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M2200/44—Valves, e.g. injectors, with valve bodies arranged side-by-side
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/005—Fuel injectors without fuel return, i.e. the pressure in the control chamber is released into the combustion chamber with fluid flow only in one direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • the invention relates to a fuel injection valve for injecting a gaseous and/or liquid fuel, in particular an alternative fuel such as ammonia.
  • the applicant's DE 102015219380 A1 discloses a fuel injection valve for injecting a gaseous and/or liquid fuel into the combustion chamber of an internal combustion engine.
  • the well-known fuel injection valve is characterized by at least two injection valve members, which can inject the same or different fuels into the combustion chamber of the internal combustion engine independently of one another.
  • the at least two injection valve members are arranged in a common nozzle body of the fuel injection valve and possibly connected to different fuel sources.
  • the at least two injection valve members are each coupled with their own actuator in order to be able to achieve independent actuation of the injection valve members.
  • the fuel injection valve according to the invention for injecting a gaseous and/or liquid fuel into the combustion chamber of an internal combustion engine with the features of claim 1 has the advantage that the fuel present in a control chamber for controlling the movement of the first injection valve member does not have to be fed into a fuel return. This is particularly advantageous when using alternative fuels such as ammonia, since such a fuel recirculation is associated with relatively high design complexity in practice.
  • the invention is based on the idea of additionally injecting or blowing the fuel present in the control chamber into the combustion chamber of the internal combustion engine without the fuel having to be routed via a fuel or fuel return line for this purpose.
  • a fuel injector according to the invention that the (first) injector member is subjected to a force by a pressure prevailing in a control chamber in its position closing the at least one (first) injection opening, so that the control chamber is at least indirectly connected to the high-pressure channel is connected, and that for the outflow of fuel from the control chamber to open the at least one (first) injection opening, the control chamber can be hydraulically connected via a connection to the combustion chamber.
  • the amount of fuel fed into the control chamber is preferably controlled via an inflow throttle.
  • the high-pressure channel is connected to the control chamber via a branch channel, and that the inflow throttle is arranged in the branch channel.
  • a second injection valve member which is arranged in a pressure chamber of the nozzle body and is preferably movably arranged, is provided for opening and closing at least one second injection opening and that the connection between the control chamber and the combustion chamber has an outflow channel, so that when the second injection valve member is open, the pressure for opening the first injection valve member can be reduced by fuel flowing out of the control chamber via the at least one second injection opening.
  • the movement of the first injection valve member is influenced by influencing the pressure in the control chamber.
  • the second injection valve member is coupled to a piezoelectric actuator or a magnetic actuator.
  • Such actuators are known, for example, in a variety of ways in fuel injectors for self-igniting or for spark-ignited internal combustion engines and are typically suitable for the fuel injector according to the invention without fundamental modifications, since they enable sufficiently fast switching times and switching forces.
  • a further advantageous embodiment of the fuel injector provides that the emission direction of the at least one second injection opening is aligned with the emission direction of at least one first injection opening for the first injection valve member such that the fuels injected via the two injection openings can be mixed. In this way, in particular, an advantageous ignition or combustion of the additional fuel introduced into the combustion chamber via the at least one second injection opening is made possible.
  • the first injector member is needle or pin-shaped, that the control chamber from a front end portion of the first injector member on the at least one first injection opening and a control sleeve radially surrounding the end section, and that a closing spring is supported axially between an end face of the control sleeve and the first injection valve member, which forces the first injection valve member into its closed position, which closes the at least one first injection opening.
  • a particularly compact construction of the fuel injection valve is achieved if the two injection valve members are designed in the form of needles or pins and are arranged parallel to one another in the nozzle body.
  • FIG. 1 shows part of a fuel injector according to the invention in a simplified longitudinal section.
  • Fuel injector 10 has a housing 12 , shown only partially, whose end facing combustion chamber 1 is designed in the form of a nozzle body 14 .
  • the nozzle body 14 has a centrally arranged first recess 16 in which a first injection valve member 20 arranged to be liftable in the direction of a longitudinal axis 18 is provided.
  • the needle or pin-shaped first injection valve member 20 is shown in Fig. 1 in its closed position, in which a conical section 22 of the first injection valve member 20 rests close to the base of the first recess 16, forming a valve seat 24, in order to form at least one, in to close the nozzle body 14 formed first injection opening 26 at least indirectly.
  • the diameter of the first recess 16 is increased and forms a high-pressure chamber 28 .
  • a plurality of flat areas 30 formed on the first injection valve member 20 enable fuel B in the high-pressure chamber 28 to flow in the direction of the valve seat 24 or to the at least one first injection opening 26.
  • the first recess 16 is in the region of the at least one first injection opening 26 Facing away from the end face 32 closed by a housing element 34 shown only partially, which at the same time delimits the high-pressure chamber 28 .
  • the high-pressure chamber 28 is connected to a high-pressure source 38 for the fuel B via a high-pressure channel 36 .
  • One of the at least one first injection opening 26 facing away from the end portion 40 of the first injection valve member 20 is surrounded radially by a control sleeve 42, within which the first injection valve member 20 is arranged with its end portion 40 longitudinally displaceable.
  • a closing spring 46 is supported in the axial direction between the end face of the control sleeve 42 facing the at least one first injection opening 26 and a shoulder 44 of the first injection valve member 20, which forces the first injection valve member 20 in the direction of the valve seat 24 or its closed position.
  • the control chamber 50 is also supplied with the fuel B, which is under high pressure, via a branch 52 with an integrated inflow throttle 54, which branches off from the high-pressure channel 36.
  • a second recess 56 is formed in the nozzle body 14 laterally next to the first recess 16 .
  • a second injection valve member 60 arranged parallel to the first injection valve member 20 is guided in a lifting manner in the second recess 56 along a longitudinal axis 58 .
  • the second recess 56 forms a pressure chamber 62 which radially surrounds the second injection valve member 60 and is connected to the control chamber 50 via an outflow channel 64 with an optional integrated outflow throttle 66 .
  • second recess 56 also has at least one second injection opening 68 for injecting or blowing in fuel B.
  • the emission direction of the at least one second injection opening 68 is aligned with the emission direction of the at least one first injection opening 26 in such a way that fuel injected or blown in via the two injection openings 26, 68 can mix. This is illustrated in FIG. 1 by the spray patterns of the fuel B, which result when the injection valve members 20, 60 are open.
  • Fig. 1 the needle or pin-shaped second injection valve member 60, whose longitudinal axis 58 runs parallel to the longitudinal axis 18 of the first injection valve member 20, is shown in its closed position, in which, near the at least one second injection opening 68, a valve seat 70 is located between the second injection valve member 60 and the second recess 56 is formed.
  • the second injection valve member 60 is connected to an actuator 72 that is only shown symbolically.
  • Actuator 72 can—in a manner known per se—be embodied either as a piezoelectric actuator or as a magnetic actuator and is used to move second injection valve member 60 from the illustrated position, which closes the at least one second injection opening 18, to an open position in which the pressure chamber 62 located fuel B can be delivered via the at least one second injection opening 68 in the combustion chamber 1 and vice versa.
  • the function of fuel injection valve 10 is explained as follows: The main quantity of fuel B is delivered into combustion chamber 1 of the internal combustion engine via at least one first injection opening 26 . For this it is necessary to move the first injection valve member 20 from the closed position shown in FIG. 1 into its open position.
  • the actuator 72 of the second injection valve member 60 is deactivated.
  • the second injection valve member 60 is adjusted, for example by means of a closing spring (not shown), into its position which closes the at least one second injection opening 68 . Because fuel B is then no longer released into combustion chamber 1 via pressure chamber 62, the pressure in control chamber 50 increases with an associated increase in the closing force in the direction of valve seat 24 on first injection valve member 20, until the at least one first Injection port 26 is closed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The invention relates to a fuel injection valve (10) for injecting a gaseous and/or liquid fuel (B) into the combustion chamber (1) of an internal combustion engine, comprising a first injection valve member (20), which is liftably arranged in a high-pressure chamber (28) of a nozzle part (14), for opening and closing at least a first injection port (26), the fuel (B) being supplied to the high-pressure chamber (28) via a high-pressure channel (36) that can be connected to a high-pressure source (38) for the fuel (B).

Description

Beschreibung description
Titel title
Brennstoffeinspritzventil fuel injector
Technisches Gebiet technical field
Die Erfindung betrifft ein Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs, insbesondere eines alternativen Brennstoffs, wie beispielsweise Ammoniak. The invention relates to a fuel injection valve for injecting a gaseous and/or liquid fuel, in particular an alternative fuel such as ammonia.
Stand der Technik State of the art
Aus der DE 102015219380 A1 der Anmelderin ist ein Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs in den Brennraum einer Brennkraftmaschine mit den Merkmalen des Oberbegriffs des Anspruchs 1 bekannt. Das bekannte Brennstoffeinspritzventil zeichnet sich durch wenigstens zwei Einspritzventilglieder aus, die voneinander unabhängig einen gleichen oder aber unterschiedliche Brennstoffe in den Brennraum der Brennkraftmaschine einspritzen können. Hierzu sind die wenigstens zwei Einspritzventilglieder in einem gemeinsamen Düsenkörper des Brennstoffeinspritzventils angeordnet und ggf. mit unterschiedlichen Brennstoffquellen verbunden. Ferner sind die wenigstens zwei Einspritzventilglieder mit jeweils einem eigenen Aktuator gekoppelt, um eine unabhängige Betätigung der Einspritzventilglieder erzielen zu können. The applicant's DE 102015219380 A1 discloses a fuel injection valve for injecting a gaseous and/or liquid fuel into the combustion chamber of an internal combustion engine. The well-known fuel injection valve is characterized by at least two injection valve members, which can inject the same or different fuels into the combustion chamber of the internal combustion engine independently of one another. For this purpose, the at least two injection valve members are arranged in a common nozzle body of the fuel injection valve and possibly connected to different fuel sources. Furthermore, the at least two injection valve members are each coupled with their own actuator in order to be able to achieve independent actuation of the injection valve members.
Weiterhin sind aus dem Stand der Technik Brennstoffeinspritzventile, insbesondere für selbstzündende Brennkraftmaschinen, bekannt, bei denen die Hubbewegung eines Einspritzventilglieds über einen in einem Steuerraum herrschenden hydraulischen Druck steuerbar ist. Offenbarung der Erfindung Furthermore, fuel injection valves, in particular for self-igniting internal combustion engines, are known from the prior art, in which the lifting movement of an injection valve member can be controlled via a hydraulic pressure prevailing in a control chamber. Disclosure of Invention
Das erfindungsgemäße Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs in den Brennraum einer Brennkraftmaschine mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass der zur Steuerung der Bewegung des ersten Einspritzventilglieds in einem Steuerraum vorhandene Brennstoff nicht in einen Kraftstoffrücklauf einspeist werden muss. Dies ist insbesondere bei der Verwendung alternativer Brennstoffe wie Ammoniak vorteilhaft, da eine derartige Kraftstoffrückführung in der Praxis mit relativ hohem konstruktivem Aufwand verbunden ist. The fuel injection valve according to the invention for injecting a gaseous and/or liquid fuel into the combustion chamber of an internal combustion engine with the features of claim 1 has the advantage that the fuel present in a control chamber for controlling the movement of the first injection valve member does not have to be fed into a fuel return. This is particularly advantageous when using alternative fuels such as ammonia, since such a fuel recirculation is associated with relatively high design complexity in practice.
Der Erfindung liegt die Idee zugrunde, den in dem Steuerraum vorhandenen Brennstoff zusätzlich in den Brennraum der Brennkraftmaschine einzuspritzen bzw. einzublasen, ohne dass der Brennstoff hierzu über einen Kraftstoff- bzw. Brennstoffrücklauf geführt werden muss. The invention is based on the idea of additionally injecting or blowing the fuel present in the control chamber into the combustion chamber of the internal combustion engine without the fuel having to be routed via a fuel or fuel return line for this purpose.
Vor dem Hintergrund der obigen Erläuterungen ist es daher bei einem erfindungsgemäßen Brennstoffeinspritzventil vorgesehen, dass das (erste) Einspritzventilglied von einem in einem Steuerraum herrschenden Druck in seine die wenigstens eine (erste) Einspritzöffnung verschließende Position kraftbeaufschlagt ist, dass der Steuerraum zumindest mittelbar mit dem Hochdruckkanal verbunden ist, und dass zum Abströmen von Brennstoff aus dem Steuerraum zum Öffnen der wenigstens einen (ersten) Einspritzöffnung der Steuerraum über eine Verbindung mit dem Brennraum hydraulisch verbindbar ist. Against the background of the above explanations, it is therefore provided in a fuel injector according to the invention that the (first) injector member is subjected to a force by a pressure prevailing in a control chamber in its position closing the at least one (first) injection opening, so that the control chamber is at least indirectly connected to the high-pressure channel is connected, and that for the outflow of fuel from the control chamber to open the at least one (first) injection opening, the control chamber can be hydraulically connected via a connection to the combustion chamber.
Vorteilhafte Ausbildungen des erfindungsgemäßen Brennstoffeinspritzventils zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs in den Brennraum einer Brennkraftmaschine sind in den Unteransprüchen aufgeführt. Advantageous developments of the fuel injection valve according to the invention for injecting a gaseous and/or liquid fuel into the combustion chamber of an internal combustion engine are listed in the dependent claims.
Bevorzugt erfolgt die Steuerung der Zulaufmenge von Brennstoff in den Steuerraum über eine Zuströmdrossel. Dabei kann es in konstruktiv vorteilhafter Ausgestaltung vorgesehen sein, dass der Hochdruckkanal über einen Abzweigkanal mit dem Steuerraum verbunden ist, und dass in dem Abzweigkanal die Zuströmdrossel angeordnet ist. In bevorzugter und auf dem Prinzip der erwähnten DE 102015219 380 A1 aufbauenden Konstruktion mit (wenigstens) zwei Einspritzventilgliedern ist es vorgesehen, dass ein zweites, in einem Druckraum des Düsenkörpers angeordnetes, vorzugsweise hubbeweglich angeordnetes Einspritzventilglied zum Öffnen und Verschließen wenigstens einer zweiten Einspritzöffnung vorgesehen ist und dass die Verbindung zwischen dem Steuerraum und dem Brennraum einen Abströmkanal aufweist, so dass bei geöffnetem zweiten Einspritzventilglied der Druck zum Öffnen des ersten Einspritzventilglieds durch Abströmen von Brennstoff aus dem Steuerraum über die wenigstens eine zweite Einspritzöffnung reduzierbar ist. The amount of fuel fed into the control chamber is preferably controlled via an inflow throttle. In a structurally advantageous embodiment, it can be provided that the high-pressure channel is connected to the control chamber via a branch channel, and that the inflow throttle is arranged in the branch channel. In a preferred construction based on the principle of the mentioned DE 102015219 380 A1 with (at least) two injection valve members, it is provided that a second injection valve member, which is arranged in a pressure chamber of the nozzle body and is preferably movably arranged, is provided for opening and closing at least one second injection opening and that the connection between the control chamber and the combustion chamber has an outflow channel, so that when the second injection valve member is open, the pressure for opening the first injection valve member can be reduced by fuel flowing out of the control chamber via the at least one second injection opening.
Wie bereits oben angeführt, wird die Bewegung des ersten Einspritzventilglieds über eine Beeinflussung des Drucks in dem Steuerraum beeinflusst. Mit anderen Worten gesagt bedeutet dies, dass das erste Einspritzventilglied keinen separaten Aktuator für dessen Bewegung erfordert. Vielmehr ist es erfindungsgemäß vorgesehen, dass (lediglich) das zweite Einspritzventilglied mit einem piezoelektrischen Aktuator oder einem magnetischen Aktuator gekoppelt ist. Derartige Aktuatoren sind beispielsweise in vielfältiger Art und Weise bei Kraftstoffinjektoren für selbstzündende oder aber für fremdgezündete Brennkraftmaschinen bekannt und typischerweise ohne grundlegende Modifikationen für das erfindungsgemäße Brennstoffeinspritzventil geeignet, da sie hinreichend schnelle Schaltzeiten und Schaltkräfte ermöglichen. As already stated above, the movement of the first injection valve member is influenced by influencing the pressure in the control chamber. In other words, this means that the first injector member does not require a separate actuator to move it. Rather, it is provided according to the invention that (only) the second injection valve member is coupled to a piezoelectric actuator or a magnetic actuator. Such actuators are known, for example, in a variety of ways in fuel injectors for self-igniting or for spark-ignited internal combustion engines and are typically suitable for the fuel injector according to the invention without fundamental modifications, since they enable sufficiently fast switching times and switching forces.
Eine weitere vorteilhafte Ausgestaltung des Brennstoffeinspritzventils sieht vor, dass die Abstrahlrichtung der wenigstens einen zweiten Einspritzöffnung mit der Abstrahlrichtung wenigstens einer ersten Einspritzöffnung für das erste Einspritzventilglied derart ausgerichtet ist, dass die über die beiden Einspritzöffnungen eingespritzten Brennstoffe vermischbar sind. Damit wird insbesondere ein vorteilhaftes Zünden bzw. Verbrennen des über die wenigstens eine zweite Einspritzöffnung in den Brennraum eingebrachten zusätzlichen Brennstoffs ermöglicht. A further advantageous embodiment of the fuel injector provides that the emission direction of the at least one second injection opening is aligned with the emission direction of at least one first injection opening for the first injection valve member such that the fuels injected via the two injection openings can be mixed. In this way, in particular, an advantageous ignition or combustion of the additional fuel introduced into the combustion chamber via the at least one second injection opening is made possible.
In konstruktiv bevorzugter Ausgestaltung des Brennstoffeinspritzventils ist es darüber hinaus vorgesehen, dass das erste Einspritzventilglied nadel- bzw. stiftförmig ausgebildet ist, dass der Steuerraum von einem stirnseitigen Endabschnitt des ersten Einspritzventilglieds auf der der wenigstens einen ersten Einspritzöffnung abgewandten Seite und einer den Endabschnitt radial umgebenden Steuerhülse begrenzt ist, und dass sich zwischen einer Stirnseite der Steuerhülse und dem ersten Einspritzventilglied eine Schließfeder axial abstützt, die das erste Einspritzventilglied in seine die wenigstens eine erste Einspritzöffnung verschließende Schließstellung kraftbeaufschlagt. In a structurally preferred embodiment of the fuel injector, it is also provided that the first injector member is needle or pin-shaped, that the control chamber from a front end portion of the first injector member on the at least one first injection opening and a control sleeve radially surrounding the end section, and that a closing spring is supported axially between an end face of the control sleeve and the first injection valve member, which forces the first injection valve member into its closed position, which closes the at least one first injection opening.
Weiterhin kann es vorgesehen sein, dass entweder in dem Abströmkanal zum Druckraum für das zweite Einspritzventilglied eine Abströmdrossel angeordnet ist, oder dass die wenigstens eine zweite Einspritzöffnung als Abströmdrossel ausgebildet ist. Provision can furthermore be made for an outflow throttle to be arranged either in the outflow channel to the pressure chamber for the second injection valve member, or for the at least one second injection opening to be designed as an outflow throttle.
Ein besonders kompakter Aufbau des Brennstoffeinspritzventils wird erzielt, wenn die beiden Einspritzventilglieder nadel- oder stiftförmig ausgebildet und parallel zueinander im Düsenkörper angeordnet sind. A particularly compact construction of the fuel injection valve is achieved if the two injection valve members are designed in the form of needles or pins and are arranged parallel to one another in the nozzle body.
Bevorzugt ist die Verwendung eines derartig soweit beschriebenen Brennstoffeinspritzventils alternative Brennstoffe, beispielsweise für Ammoniak. The use of such a fuel injection valve as described so far is preferred for alternative fuels, for example for ammonia.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsformen der Erfindung sowie anhand der Zeichnung. Further advantages, features and details of the invention result from the following description of preferred embodiments of the invention and from the drawing.
Kurze Beschreibung der Zeichnung Brief description of the drawing
Die Fig. 1 zeigt in einem vereinfachten Längsschnitt einen Teil eines erfindungsgemäßen Brennstoffeinspritzventils. 1 shows part of a fuel injector according to the invention in a simplified longitudinal section.
Ausführungsformen der Erfindung Embodiments of the invention
In der Fig. 1 ist ein Brennstoffeinspritzventil 10 zum Einspritzen bzw. Einblasen eines gasförmigen und/oder flüssigen Brennstoffs B in den Brennraum 1 einer nicht dargestellten Brennkraftmaschine gezeigt. Insbesondere eignet sich das Brennstoffeinspritzventil 10 zum Einspritzen bzw. Einblasen alternativer Brennstoffe B, wie Ammoniak. Das Brennstoffeinspritzventil 10 weist ein lediglich teilweise dargestelltes Gehäuse 12 auf, dessen dem Brennraum 1 zugewandtes Ende in Form eines Düsenkörpers 14 ausgebildet ist. Der Düsenkörper 14 weist eine zentral angeordnete erste Ausnehmung 16 auf, in der in Richtung einer Längsachse 18 ein hubbeweglich angeordnetes erstes Einspritzventilglied 20 vorgesehen ist.1 shows a fuel injection valve 10 for injecting or blowing in a gaseous and/or liquid fuel B into the combustion chamber 1 of an internal combustion engine (not shown). In particular, fuel injection valve 10 is suitable for injecting or blowing in alternative fuels B, such as ammonia. Fuel injector 10 has a housing 12 , shown only partially, whose end facing combustion chamber 1 is designed in the form of a nozzle body 14 . The nozzle body 14 has a centrally arranged first recess 16 in which a first injection valve member 20 arranged to be liftable in the direction of a longitudinal axis 18 is provided.
Das nadel- bzw. stiftförmig ausgebildete erste Einspritzventilglied 20 ist in der Fig. 1 in seiner Schließstellung gezeigt, bei der ein kegelförmiger Abschnitt 22 des ersten Einspritzventilglieds 20 unter Ausbildung eines Ventilsitzes 24 nahe dem Grund der ersten Ausnehmung 16 anliegt, um wenigstens eine, in dem Düsenkörper 14 ausgebildete erste Einspritzöffnung 26 zumindest mittelbar zu verschließen. The needle or pin-shaped first injection valve member 20 is shown in Fig. 1 in its closed position, in which a conical section 22 of the first injection valve member 20 rests close to the base of the first recess 16, forming a valve seat 24, in order to form at least one, in to close the nozzle body 14 formed first injection opening 26 at least indirectly.
Auf der der ersten Einspritzöffnung 26 abgewandten Seite ist die erste Ausnehmung 16 im Durchmesser vergrößert und bildet einen Hochdruckraum 28 aus. Mehrere, an dem ersten Einspritzventilglied 20 ausgebildete Abflachungen 30 ermöglichen ein Strömen von in dem Hochdruckraum 28 befindlichem Brennstoff B in Richtung des Ventilsitzes 24 bzw. zu der wenigstens einen ersten Einspritzöffnung 26. Die erste Ausnehmung 16 ist im Bereich der der wenigstens einen ersten Einspritzöffnung 26 abgewandten Stirnseite 32 von einem lediglich bereichsweise dargestellten Gehäuseelement 34 verschlossen, das gleichzeitig den Hochdruckraum 28 begrenzt. Der Hochdruckraum 28 ist über einen Hochdruckkanal 36 mit einer Hochdruckquelle 38 für den Brennstoff B verbunden. On the side facing away from the first injection opening 26 , the diameter of the first recess 16 is increased and forms a high-pressure chamber 28 . A plurality of flat areas 30 formed on the first injection valve member 20 enable fuel B in the high-pressure chamber 28 to flow in the direction of the valve seat 24 or to the at least one first injection opening 26. The first recess 16 is in the region of the at least one first injection opening 26 Facing away from the end face 32 closed by a housing element 34 shown only partially, which at the same time delimits the high-pressure chamber 28 . The high-pressure chamber 28 is connected to a high-pressure source 38 for the fuel B via a high-pressure channel 36 .
Ein der wenigstens einen ersten Einspritzöffnung 26 abgewandter Endabschnitt 40 des ersten Einspritzventilglieds 20 ist radial von einer Steuerhülse 42 umgeben, innerhalb derer das erste Einspritzventilglied 20 mit seinem Endabschnitt 40 längsverschiebbar angeordnet ist. Zwischen der der wenigstens einen ersten Einspritzöffnung 26 zugewandten Stirnseite der Steuerhülse 42 und einem Absatz 44 des ersten Einspritzventilglieds 20 stützt sich eine Schließfeder 46 in axialer Richtung ab, die das erste Einspritzventilglied 20 in Richtung des Ventilsitzes 24 bzw. seine Schließstellung kraftbeaufschlagt. One of the at least one first injection opening 26 facing away from the end portion 40 of the first injection valve member 20 is surrounded radially by a control sleeve 42, within which the first injection valve member 20 is arranged with its end portion 40 longitudinally displaceable. A closing spring 46 is supported in the axial direction between the end face of the control sleeve 42 facing the at least one first injection opening 26 and a shoulder 44 of the first injection valve member 20, which forces the first injection valve member 20 in the direction of the valve seat 24 or its closed position.
Die der wenigstens einen ersten Einspritzöffnung 26 abgewandte Stirnfläche 48 des ersten Einspritzventilglieds 20 begrenzt zusammen mit der Steuerhülse 42 und dem Gehäuseelement 34 einen Steuerraum 50. Der Steuerraum 50 ist über einen von dem Hochdruckkanal 36 abgehenden Abzweig 52 mit integrierter Zuströmdrossel 54 ebenfalls mit dem unter Hochdruck stehenden Brennstoff B versorg bar. The end face 48 of the first injection valve member 20 facing away from the at least one first injection opening 26 delimits, together with the control sleeve 42 and the housing element 34 has a control chamber 50. The control chamber 50 is also supplied with the fuel B, which is under high pressure, via a branch 52 with an integrated inflow throttle 54, which branches off from the high-pressure channel 36.
Seitlich neben der ersten Ausnehmung 16 ist in dem Düsenkörper 14 eine zweite Ausnehmung 56 ausgebildet. In der zweiten Ausnehmung 56 ist entlang einer Längsachse 58 ein zweites, parallel zum ersten Einspritzventilglied 20 angeordnetes Einspritzventilglied 60 hubbeweglich geführt. Die zweite Ausnehmung 56 bildet einen das zweite Einspritzventilglied 60 radial umgebenden Druckraum 62 aus, der über einen Abströmkanal 64 mit optionaler integrierter Abströmdrossel 66 mit dem Steuerraum 50 verbunden ist. A second recess 56 is formed in the nozzle body 14 laterally next to the first recess 16 . A second injection valve member 60 arranged parallel to the first injection valve member 20 is guided in a lifting manner in the second recess 56 along a longitudinal axis 58 . The second recess 56 forms a pressure chamber 62 which radially surrounds the second injection valve member 60 and is connected to the control chamber 50 via an outflow channel 64 with an optional integrated outflow throttle 66 .
Auf der dem Brennraum 1 zugewandten Seite weist die zweite Ausnehmung 56 darüber hinaus wenigstens eine zweite Einspritzöffnung 68 zum Einspritzen bzw. Einblasen des Brennstoffs B auf. Die Abstrahlrichtung der wenigstens einen zweiten Einspritzöffnung 68 ist derart mit der Abstrahlrichtung der wenigstens einen ersten Einspritzöffnung 26 ausgerichtet, dass über die beiden Einspritzöffnungen 26, 68 eingespritzter bzw. eingeblasener Brennstoff sich vermischen kann. Dies ist in der Fig. 1 durch die Sprühbilder des Brennstoffs B verdeutlicht, die sich bei geöffneten Einspritzventilgliedern 20, 60 ergeben. On the side facing combustion chamber 1, second recess 56 also has at least one second injection opening 68 for injecting or blowing in fuel B. The emission direction of the at least one second injection opening 68 is aligned with the emission direction of the at least one first injection opening 26 in such a way that fuel injected or blown in via the two injection openings 26, 68 can mix. This is illustrated in FIG. 1 by the spray patterns of the fuel B, which result when the injection valve members 20, 60 are open.
In der Fig. 1 ist das nadel- bzw. stiftförmige zweite Einspritzventilglied 60, dessen Längsachse 58 parallel zur Längsachse 18 des ersten Einspritzventilglieds 20 verläuft, in seiner Schließstellung gezeigt, bei der nahe der wenigstens einen zweiten Einspritzöffnung 68 ein Ventilsitz 70 zwischen dem zweiten Einspritzventilglied 60 und der zweiten Ausnehmung 56 ausgebildet ist. In Fig. 1, the needle or pin-shaped second injection valve member 60, whose longitudinal axis 58 runs parallel to the longitudinal axis 18 of the first injection valve member 20, is shown in its closed position, in which, near the at least one second injection opening 68, a valve seat 70 is located between the second injection valve member 60 and the second recess 56 is formed.
Das zweite Einspritzventilglied 60 ist mit einem lediglich symbolisch dargestellten Aktuator 72 verbunden. Der Aktuator 72 kann - in an sich bekannter Art und Weise - entweder als Piezoaktuator oder als Magnetaktuator ausgebildet sein und dient der Bewegung des zweiten Einspritzventilglieds 60 aus der dargestellten, die wenigstens eine zweite Einspritzöffnung 18 verschließenden Stellung in eine Öffnungsstellung, in der in dem Druckraum 62 befindlicher Brennstoff B über die wenigstens eine zweite Einspritzöffnung 68 in den Brennraum 1 abgegeben werden kann und umgekehrt. Die Funktion des Brennstoffeinspritzventils 10 wird wie folgt erläutert: Über die wenigstens eine erste Einspritzöffnung 26 wird die Hauptmenge von Brennstoff B in den Brennraum 1 der Brennkraftmaschine abgegeben. Hierzu ist es erforderlich, das erste Einspritzventilglied 20 aus der in der Fig. 1 dargestellten Schließstellung in seine Öffnungsstellung zu bewegen. Dies erfolgt durch eine Betätigung des Aktuators 72, der das zweite Einspritzventilglied 60 aus seiner Schließstellung in seine Öffnungsstellung bewegt. Dadurch erfolgt ein Abströmen von Brennstoff B aus dem Steuerraum 50 über den Abströmkanal 64 in den Druckraum 62 und von dort über die wenigstens eine zweite Einspritzöffnung 68 in den Brennraum 1. Die Druckreduzierung in dem Steuerraum 50 bewirkt, dass die in Richtung des Ventilsitzes 24 wirkende Schließkraft auf das erste Einspritzventilglied 20 reduziert wird, wodurch ein Abheben des ersten Einspritzventilglieds 20 von seinem Ventilsitz 24 erfolgt. Dadurch kann Brennstoff B über den Hochdruckraum 28 über die wenigstens eine erste Einspritzöffnung 26 in den Brennraum 1 abgegeben werden. The second injection valve member 60 is connected to an actuator 72 that is only shown symbolically. Actuator 72 can—in a manner known per se—be embodied either as a piezoelectric actuator or as a magnetic actuator and is used to move second injection valve member 60 from the illustrated position, which closes the at least one second injection opening 18, to an open position in which the pressure chamber 62 located fuel B can be delivered via the at least one second injection opening 68 in the combustion chamber 1 and vice versa. The function of fuel injection valve 10 is explained as follows: The main quantity of fuel B is delivered into combustion chamber 1 of the internal combustion engine via at least one first injection opening 26 . For this it is necessary to move the first injection valve member 20 from the closed position shown in FIG. 1 into its open position. This is done by actuating the actuator 72, which moves the second injection valve member 60 from its closed position to its open position. This causes fuel B to flow out of control chamber 50 via outflow channel 64 into pressure chamber 62 and from there via the at least one second injection opening 68 into combustion chamber 1. The pressure reduction in control chamber 50 causes the pressure acting in the direction of valve seat 24 to Closing force on the first injection valve member 20 is reduced, as a result of which the first injection valve member 20 is lifted off its valve seat 24 . As a result, fuel B can be delivered into combustion chamber 1 via high-pressure chamber 28 via at least one first injection opening 26 .
Zur Beendigung des Abgebens von Brennstoff B über die wenigstens eine erste Einspritzöffnung 26 wird der Aktuator 72 des zweiten Einspritzventilglieds 60 deaktiviert. Dadurch wird das zweite Einspritzventilglied 60 beispielsweise mittels einer nicht dargestellten Schließfeder in seine die wenigstens eine zweite Einspritzöffnung 68 verschließende Position verstellt. Dadurch, dass dann über den Druckraum 62 kein Brennstoff B mehr in den Brennraum 1 abgegeben wird, erfolgt eine Erhöhung des Drucks im Steuerraum 50 mit einer damit verbundenen Erhöhung der Schließkraft in Richtung des Ventilsitzes 24 auf das erste Einspritzventilglied 20, bis die wenigstens eine erste Einspritzöffnung 26 geschlossen ist. To end the delivery of fuel B via the at least one first injection opening 26, the actuator 72 of the second injection valve member 60 is deactivated. As a result, the second injection valve member 60 is adjusted, for example by means of a closing spring (not shown), into its position which closes the at least one second injection opening 68 . Because fuel B is then no longer released into combustion chamber 1 via pressure chamber 62, the pressure in control chamber 50 increases with an associated increase in the closing force in the direction of valve seat 24 on first injection valve member 20, until the at least one first Injection port 26 is closed.
Das soweit beschriebene Brennstoffeinspritzventil 10 kann in vielfältiger Art und Weise abgewandelt bzw. modifiziert werden, ohne vom Erfindungsgedanken abzuweichen. The fuel injector 10 described so far can be modified in many ways without departing from the spirit of the invention.

Claims

Ansprüche Expectations
1. Brennstoffeinspritzventil (10) zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs (B) in den Brennraum (1) einer Brennkraftmaschine, mit einem ersten, in einem Hochdruckraum (28) eines Düsenkörpers (14) hubbeweglich angeordneten Einspritzventilglied (20) zum Öffnen und Verschließen wenigstens einer ersten Einspritzöffnung (26), wobei der Hochdruckraum (28) über einen mit einer Hochdruckquelle (38) für den Brennstoff (B) verbindbaren Hochdruckkanal (36) mit dem Brennstoff (B) versorgbar ist, und wobei das erste Einspritzventilglied (20) von einem in einem Steuerraum (50) herrschenden Druck in seine die wenigstens eine erste Einspritzöffnung (26) verschließende Position kraftbeaufschlagt ist und der Steuerraum (50) zumindest mittelbar mit dem Hochdruckkanal (36) verbunden ist, dadurch gekennzeichnet, dass zum Abströmen von Brennstoff (B) aus dem Steuerraum (50) zum Öffnen der wenigstens einen ersten Einspritzöffnung (26) der Steuerraum (50) über eine Verbindung mit dem Brennraum (1) hydraulisch verbindbar ist. 1. Fuel injection valve (10) for injecting a gaseous and/or liquid fuel (B) into the combustion chamber (1) of an internal combustion engine, with a first injection valve member (20) arranged such that it can lift in a high-pressure chamber (28) of a nozzle body (14) for opening and closing at least one first injection opening (26), the high-pressure chamber (28) being able to be supplied with the fuel (B) via a high-pressure channel (36) which can be connected to a high-pressure source (38) for the fuel (B), and the first injection valve member ( 20) is acted upon by a pressure prevailing in a control chamber (50) into its position in which it closes the at least one first injection opening (26), and the control chamber (50) is at least indirectly connected to the high-pressure channel (36), characterized in that for the outflow of Fuel (B) from the control chamber (50) to open the at least one first injection opening (26) of the control chamber (50) via a connection with the B racing chamber (1) can be connected hydraulically.
2. Brennstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, dass zwischen dem Hochdruckkanal (36) und dem Steuerraum (50) eine Zuströmdrossel (54) angeordnet ist. 2. Fuel injection valve according to Claim 1, characterized in that an inflow throttle (54) is arranged between the high-pressure channel (36) and the control chamber (50).
3. Brennstoffeinspritzventil nach Anspruch 2, dadurch gekennzeichnet, dass der Hochdruckkanal (36) über einen Abzweig (52) mit dem Steuerraum (50) verbunden ist, und dass in dem Abzweig (52) die Zuströmdrossel (54) angeordnet ist. 3. The fuel injection valve as claimed in claim 2, characterized in that the high-pressure channel (36) is connected to the control chamber (50) via a branch (52), and in that the inflow throttle (54) is arranged in the branch (52).
4. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass ein zweites, in einem Druckraum (62) des Düsenkörpers (14) angeordnetes, vorzugsweise hubbeweglich angeordnetes Einspritzventilglied (60) zum Öffnen und Verschließen wenigstens einer zweiten Einspritzöffnung (68) vorgesehen ist, und dass die Verbindung zwischen dem Steuerraum (50) und dem Brennraum (1) einen Abströmkanal (64) aufweist, so dass bei geöffnetem zweiten Einspritzventilglied (60) der Druck zum Öffnen des ersten Einspritzventilglieds (20) durch Abströmen von Brennstoff (B) aus dem Steuerraum (50) über die wenigstens eine zweite Einspritzöffnung (68) reduzierbar ist. 4. Fuel injection valve according to one of claims 1 to 3, characterized in that that a second injection valve member (60) is arranged in a pressure chamber (62) of the nozzle body (14) and is preferably arranged such that it can be lifted, for opening and closing at least one second injection opening (68), and that the connection between the control chamber (50) and the Combustion chamber (1) has an outflow channel (64), so that when the second injection valve member (60) is open, the pressure for opening the first injection valve member (20) is released by fuel (B) flowing out of the control chamber (50) via the at least one second injection opening ( 68) is reducible.
5. Brennstoffeinspritzventil nach Anspruch 4, dadurch gekennzeichnet, dass das zweite Einspritzventilglied (60) mit einem piezoelektrischen oder einem magnetischen Aktuator (72) gekoppelt ist. 5. Fuel injection valve according to claim 4, characterized in that the second injection valve member (60) is coupled to a piezoelectric or a magnetic actuator (72).
6. Brennstoffeinspritzventil nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Abstrahlrichtung der wenigstens einen zweiten Einspritzöffnung (68) mit der Abstrahlrichtung wenigstens einer ersten Einspritzöffnung (26) derart ausgerichtet ist, dass die über die beiden Einspritzöffnungen (26, 68) eingespritzten Brennstoffe (B) vermischbar sind. 6. The fuel injector according to claim 4 or 5, characterized in that the emission direction of the at least one second injection opening (68) is aligned with the emission direction of at least one first injection opening (26) in such a way that the fuels injected via the two injection openings (26, 68). (B) are miscible.
7. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das erste Einspritzventilglied (20) nadel- bzw. stiftförmig ausgebildet ist, dass der Steuerraum (50) von einem stirnseitigen Endabschnitt (40) des ersten Einspritzventilglieds (20) auf der, der wenigstens einen ersten Einspritzöffnung (26) abgewandten Seite und einer den Endabschnitt (40) radial umgebenden Steuerhülse (42) begrenzt ist, und dass sich zwischen einer Stirnseite der Steuerhülse (42) und dem ersten Einspritzventilglied (20) eine Schließfeder (46) axial abstützt, die das erste Einspritzventilglied (20) in seine die wenigstens eine erste Einspritzöffnung (26) verschließende Schließstellung kraftbeaufschlagt. 7. Fuel injection valve according to one of Claims 1 to 6, characterized in that the first injection valve member (20) is designed in the shape of a needle or pin, that the control chamber (50) extends from a front end section (40) of the first injection valve member (20) on the , which is delimited by at least one side facing away from the first injection opening (26) and by a control sleeve (42) radially surrounding the end section (40), and that a closing spring (46) is located between an end face of the control sleeve (42) and the first injection valve member (20). is supported axially, which applies a force to the first injection valve member (20) in its closed position, which closes the at least one first injection opening (26).
8. Brennstoffeinspritzventil nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass in dem Abströmkanal (64) eine Abströmdrossel (66) angeordnet ist. 8. Fuel injection valve according to one of claims 4 to 7, characterized in that that in the outflow channel (64) an outflow throttle (66) is arranged.
9. Brennstoffeinspritzventil nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, dass die wenigstens eine zweite Einspritzöffnung (68) als Abströmdrossel ausgebildet ist. 9. Fuel injection valve according to one of claims 4 to 8, characterized in that the at least one second injection opening (68) is designed as an outflow throttle.
10. Brennstoffeinspritzventil nach einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, dass die beiden Einspritzventilglieder (20, 60) stift- oder nadelförmig ausgebildet und parallel zueinander im Düsenkörper (14) angeordnet sind. 10. Fuel injection valve according to one of Claims 4 to 9, characterized in that the two injection valve members (20, 60) are designed in the form of pins or needles and are arranged parallel to one another in the nozzle body (14).
PCT/EP2022/056476 2021-03-29 2022-03-14 Fuel injection valve WO2022207287A1 (en)

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Citations (3)

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DE102008042227A1 (en) * 2008-09-19 2010-04-01 Robert Bosch Gmbh Fuel injector, particularly common rail injector for injecting fuel into combustion chamber of internal-combustion engine, comprises injection valve element, which is adjustable between closing position and opening position
DE102008042531A1 (en) * 2008-10-01 2010-04-08 Robert Bosch Gmbh Valve arrangement for fuel high pressure injection, comprises electromagnets, anchor, sliding sleeve and housing provided with spraying holes, where interior element divides interior space of housing
DE102015219380A1 (en) 2015-10-07 2017-04-13 Robert Bosch Gmbh Fuel injection valve for injecting a gaseous and / or liquid fuel

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DE10221384A1 (en) 2002-05-14 2003-11-27 Bosch Gmbh Robert Fuel injection device for an internal combustion engine
DE102004011096A1 (en) 2004-03-06 2005-09-22 Robert Bosch Gmbh Fuel injection valve, for an IC motor common rail system, has an outer needle for an injection opening and an inner axial sliding needle for a further opening for one to be used when idling and all openings when the motor power is increased
DE102009000283A1 (en) 2008-02-04 2009-08-06 Robert Bosch Gmbh Fuel injector, particularly common-rail injector for injecting fuel into combustion chamber of internal-combustion engine, has sealing edge that is formed at front wall of injection valve element
DE102013022260B3 (en) 2013-12-30 2015-05-21 L'orange Gmbh Dual-fuel fuel injector

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Publication number Priority date Publication date Assignee Title
DE102008042227A1 (en) * 2008-09-19 2010-04-01 Robert Bosch Gmbh Fuel injector, particularly common rail injector for injecting fuel into combustion chamber of internal-combustion engine, comprises injection valve element, which is adjustable between closing position and opening position
DE102008042531A1 (en) * 2008-10-01 2010-04-08 Robert Bosch Gmbh Valve arrangement for fuel high pressure injection, comprises electromagnets, anchor, sliding sleeve and housing provided with spraying holes, where interior element divides interior space of housing
DE102015219380A1 (en) 2015-10-07 2017-04-13 Robert Bosch Gmbh Fuel injection valve for injecting a gaseous and / or liquid fuel

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