EP2893182A1 - Injection valve - Google Patents

Injection valve

Info

Publication number
EP2893182A1
EP2893182A1 EP13739435.9A EP13739435A EP2893182A1 EP 2893182 A1 EP2893182 A1 EP 2893182A1 EP 13739435 A EP13739435 A EP 13739435A EP 2893182 A1 EP2893182 A1 EP 2893182A1
Authority
EP
European Patent Office
Prior art keywords
guide element
stop
injection valve
armature
valve needle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13739435.9A
Other languages
German (de)
French (fr)
Other versions
EP2893182B1 (en
Inventor
Philipp Rogler
Martin Scheffel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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 EP2893182A1 publication Critical patent/EP2893182A1/en
Application granted granted Critical
Publication of EP2893182B1 publication Critical patent/EP2893182B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/066—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0685—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies

Definitions

  • the present invention relates to an injection valve for injecting a medium, in particular for injecting fuel in a combustion chamber.
  • the prior art shows valves for injection of gasoline with a
  • Valve needle which is moved by an actuator, such as an electromagnet or piezo actuator, against a closing spring so that a desired amount of fuel is selectively introduced directly into the combustion chamber.
  • an injection valve is considered in which the armature is decoupled from the valve needle.
  • Stop hits. From the bottom stop, the armature bounces off one or more times if necessary, until it reaches its rest position again. The time it takes for the armature to return to the rest position is critical to the ability of the valve to rapidly eject successive injections with high accuracy.
  • the injector according to the invention with the features of claim 1 allows a very fast recovery of the armature after the
  • Valve needle but is guided on the guide element.
  • the valve needle therefore no longer has to be micromachined. It eliminates, for example, a grinding of the valve needle or it can be used without further reworking a rolled or drawn needle pin. All these advantages are achieved by the injection valve according to the invention, which in particular at
  • the injection valve comprises a housing with at least one injection opening on an outlet side, a magnetic coil and a magnetic armature that is linearly movable by the magnetic coil. Furthermore, a linearly movable valve needle for opening and closing the injection opening is provided.
  • the armature is linearly movable between a first stop and a second stop coaxial with the valve needle.
  • the valve needle is firmly connected to the guide element.
  • the outer surface of the guide element serves as a guide for the Linearbewegegung of the armature.
  • the second stop is an integral part of the guide element.
  • the leadership of the armature is integral with the second stop
  • the first stop is on the outlet side facing away from the armature and can thus be referred to as the upper stop.
  • the second stop is on the outlet side facing the armature and can thus be referred to as a lower stop.
  • a nip is defined between the armature and the second stop. In this nip is the medium to be injected, so that the
  • Magnetic anchor dampens and the magnet armature quickly returns to its rest position.
  • the effectiveness of the nip depends on the minimum
  • the second stop is formed on a stop sleeve.
  • the stop sleeve in turn is welded to the valve needle. In this welding, a tilting of the stop sleeve and thus also of the second stop against the valve needle, whereby the gap height of the nip is changed unfavorably.
  • the guide element, on which the second stop is formed is simultaneously used to guide the magnet armature. As a result, one is
  • the guide element is preferably designed as a plugged onto the valve needle sleeve.
  • the guide element extends as a solid body, the valve needle in the longitudinal direction.
  • the first stopper formed on a ring is attached to the guide element.
  • the ring is welded to the guide element. The distance between the two stops minus the height of the armature defines the
  • the ring is preferably designed in cross-section L-shaped.
  • the welding between ring and guide element is preferably carried out on the
  • the guide element is preferably welded to the valve needle.
  • the weld is preferably set only on the side facing the outlet of the second stop.
  • the guide element is made together with the second stop as a one-piece turned or milled part.
  • the second stop is perpendicular from the guide element.
  • the guide element has in particular a cylindrical outer surface on which the magnet armature is guided.
  • FIG. 2 shows a detail of the injection valve according to the invention
  • FIG. 1 shows a detail of the injection valve according to the invention
  • the injection valve 1 comprises a housing 2.
  • the housing 2 is shown only partially and schematically in FIG. At least one injection opening 4 in the housing 2 is formed on an outlet side 3 of the injection valve 1. Furthermore, the housing 2 carries a magnetic coil 5.
  • the injection valve 1 further comprises a magnet armature 6 and a valve needle 7 with a ball 8.
  • the armature 6 is linearly movable along a longitudinal axis 23 between a first stop 1 1 and a second stop 12. The distance between the two stops 1 1, 12 defines a Ankerokweg 13.
  • a first spring 9 loads the valve needle 7 in the direction of the outlet side 3.
  • a second spring 12 is connected via a spring cup 14 to the armature 6.
  • the second spring 10 also loads the magnet armature 6 via the spring cup 14 in the direction of the outlet side 3, so that the armature 6 rests against the second stop 12 by the force of the second spring 10.
  • channels 15 are formed. Through the channels 15 of the fuel to be injected can flow. Additionally or alternatively to the channels 15 and the valve needle 7 may be formed as a hollow needle.
  • Figure 2 shows a detail of the injection valve 1.
  • a guide member 16 formed as a sleeve 16, inserted.
  • An integral part of the guide member 16 is the second stop 12.
  • the guide member 16 together with the second stop 12 is made as a one-piece rotary member.
  • the guide element 16 extends over a guide element length 21.
  • the magnet armature 6 extends over a magnet armature length 22. The lengths are measured parallel to the longitudinal axis 23.
  • the guide element length 21 is much longer than the
  • the guide member 16 On the guide member 16 is a ring 17. At the ring 17, the first stop 1 1 is formed.
  • the ring 17 is L-shaped in cross section.
  • the ring 17 is connected via a first weld 19 with the guide member 16.
  • the guide element 16 in turn is connected to the valve needle 7 with a second weld 20.
  • Fig. 3 shows a detail of a second embodiment.
  • the guide member 16 is not formed as a sleeve, but as a solid body.
  • the valve needle 7 ends below the
  • the guide element 16 extends the valve needle 7 along the longitudinal axis 23 at least to the ring 17th
  • the guide element 16 thus combines the guiding and stop function.
  • the embodiments can be constructed with a hollow or with a solid valve needle 7, which generally does not have to be symmetrical.
  • the guide member 16 is configured so that the serving for guiding outer surface 18 and the rectangular surface of the second stop 12 made in one setting, for example, rotated and / or ground, can be.
  • the welds 19, 20 are preferably so far away from the guide and stop surface that these surfaces are not distorted by the welding process.

Landscapes

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

Abstract

The present invention relates to an injection valve (1) for injecting a medium, in particular for injecting fuel into a combustion chamber, comprising: a housing (2) with at least one spray opening (4) on an outlet side (3), a magnet coil (5), a magnet armature (6) that can be moved linearly by the magnet coil (5), a linearly movable valve needle (7) for opening and closing the spray opening (4), a first abutment (11) on a side of the magnet armature (6) facing away from the outlet and a second abutment (12) on a side of the magnet armature (6) facing toward the outlet, wherein the magnet armature (6) is linearly movable with respect to the valve needle (7) between the first abutment (11) and the second abutment (12), and guide element (16) joined to the valve needle (7), wherein an outer surface (18) of the guide element (16) serves as a guide for the linear movement of the magnet armature (6), and wherein the second abutment (12) is an integral constituent part of the guide element (16).

Description

Beschreibung  description
Titel title
Einspritzventil Stand der Technik  Injection valve prior art
Die vorliegende Erfindung betrifft ein Einspritzventil zum Einspritzen eines Mediums, insbesondere zum Einspritzen von Brennstoff in einem Brennraum. Der Stand der Technik zeigt Ventile zur Einspritzung von Ottokraftstoff mit einerThe present invention relates to an injection valve for injecting a medium, in particular for injecting fuel in a combustion chamber. The prior art shows valves for injection of gasoline with a
Ventilnadel, die von einem Aktor, beispielsweise einem Elektromagneten oder Piezosteller, gegen eine Schließfeder so bewegt wird, dass eine gewünschte Kraftstoffmenge gezielt direkt in den Brennraum eingebracht wird. Im Valve needle, which is moved by an actuator, such as an electromagnet or piezo actuator, against a closing spring so that a desired amount of fuel is selectively introduced directly into the combustion chamber. in the
vorliegenden Fall wird ein Einspritzventil betrachtet, bei dem der Magnetanker von der Ventilnadel entkoppelt ist. Beim Öffnen des Ventils soll sich der In the present case, an injection valve is considered in which the armature is decoupled from the valve needle. When opening the valve, the
Magnetanker schnell von dem an der Ventilnadel befindlichen unteren Anschlag lösen, den Ankerfreiweg schnell überwinden und beim Auftreffen auf den oberen Anschlag das Ventil schnell öffnen. Wird die Bestromung des Ventils beendet, schließt die Ventilnadel wieder. Der Magnetanker führt, nachdem die Ventilnadel den Ventilsitz wieder verschließt, seine Bewegung fort, bis er auf den unteren Quickly release the magnet armature from the lower stop located on the valve pin, quickly overcome the armature free travel and quickly open the valve when hitting the top stop. If the energization of the valve is terminated, the valve needle closes again. The armature, after the valve needle closes the valve seat, continues its movement until it reaches the bottom
Anschlag trifft. Vom unteren Anschlag prellt der Magnetanker gegebenenfalls ein- oder mehrmals ab, bis er seine Ruheposition wieder erreicht. Die Zeit, bis der Magnetanker wieder in die Ruheposition zurückgestellt wird, ist entscheidend für die Fähigkeit des Ventils, schnell aufeinanderfolgende Einspritzungen mit hoher Genauigkeit abzusetzen. Stop hits. From the bottom stop, the armature bounces off one or more times if necessary, until it reaches its rest position again. The time it takes for the armature to return to the rest position is critical to the ability of the valve to rapidly eject successive injections with high accuracy.
Offenbarung der Erfindung Disclosure of the invention
Das erfindungsgemäße Einspritzventil mit den Merkmalen des Anspruchs 1 ermöglicht eine sehr schnelle Rückstellung des Magnetankers nach dem The injector according to the invention with the features of claim 1 allows a very fast recovery of the armature after the
Schließen des Ventils durch eine verbesserte Dämpfung. Dadurch kann das Einspritzventil kurz nacheinander sehr präzise einspritzen. Der Ankerfreiweg ist dabei nach wie vor einstellbar. Das Schaltverhalten und die Mengenzumessung des Einspritzventils wird vereinheitlicht und die Istwerte weichen somit möglichst wenig vom Sollwert ab. Die Kosten zur Herstellung der Ventilnadel können reduziert werden, da der Magnetanker erfindungsgemäß nicht mehr auf derClosing the valve through improved damping. This can do that Inject injection valve very precisely in quick succession. The Ankerfreiweg is still adjustable. The switching behavior and the quantitative metering of the injection valve are standardized and the actual values thus deviate as little as possible from the nominal value. The cost of producing the valve needle can be reduced because the armature according to the invention no longer on the
Ventilnadel, sondern auf dem Führungselement geführt wird. Die Ventilnadel muss deshalb nicht mehr feinstbearbeitet werden. Es entfällt beispielsweise ein Schleifen der Ventilnadel bzw. es kann ein gerollter oder gezogener Nadelstift ohne weitere Nachbearbeitung verwendet werden. All diese Vorteile werden erreicht durch das erfindungsgemäße Einspritzventil, welches insbesondere beiValve needle, but is guided on the guide element. The valve needle therefore no longer has to be micromachined. It eliminates, for example, a grinding of the valve needle or it can be used without further reworking a rolled or drawn needle pin. All these advantages are achieved by the injection valve according to the invention, which in particular at
Ottomotoren zur Kanal- oder Direkteinspritzung von Kraftstoff genutzt wird. Das Einspritzventil umfasst ein Gehäuse mit zumindest einer Spritzöffnung an einer Auslassseite, eine Magnetspule und einen durch die Magnetspule linear beweglichen Magnetanker. Des Weiteren ist eine linearbewegliche Ventilnadel zum Öffnen und Schließen der Spritzöffnung vorgesehen. Der Magnetanker ist zwischen einem ersten Anschlag und einem zweiten Anschlag koaxial zur Ventilnadel linear beweglich. Erfindungsgemäß ist die Ventilnadel fest mit dem Führungselement verbunden. Die Außenfläche des Führungselements dient dabei als Führung für die Linearbewegegung des Magnetankers. Gleichzeitig ist der zweite Anschlag ein integraler Bestandteil des Führungselements. Somit ist die Führung des Magnetankers einstückig mit dem zweiten Anschlag Gasoline engines for channel or direct injection of fuel is used. The injection valve comprises a housing with at least one injection opening on an outlet side, a magnetic coil and a magnetic armature that is linearly movable by the magnetic coil. Furthermore, a linearly movable valve needle for opening and closing the injection opening is provided. The armature is linearly movable between a first stop and a second stop coaxial with the valve needle. According to the invention, the valve needle is firmly connected to the guide element. The outer surface of the guide element serves as a guide for the Linearbewegegung of the armature. At the same time, the second stop is an integral part of the guide element. Thus, the leadership of the armature is integral with the second stop
ausgebildet. Der erste Anschlag ist auf der auslassabgewandten Seite des Magnetankers und kann somit als oberer Anschlag bezeichnet werden. Der zweite Anschlag ist auf der auslasszugewandten Seite des Magnetankers und kann somit als unterer Anschlag bezeichnet werden. Zwischen dem Magnetanker und dem zweiten Anschlag ist üblicherweise ein Quetschspalt definiert. In diesem Quetschspalt befindet sich das einzuspritzende Medium, so dass der educated. The first stop is on the outlet side facing away from the armature and can thus be referred to as the upper stop. The second stop is on the outlet side facing the armature and can thus be referred to as a lower stop. Between the armature and the second stop usually a nip is defined. In this nip is the medium to be injected, so that the
Quetschspalt beim Schließen des Einspritzventils die Bewegung des Crushing gap when closing the injector, the movement of the
Magnetankers dämpft und den Magnetanker schnell in seine Ruheposition zurückstellt. Die Wirksamkeit des Quetschspaltes hängt von der minimalenMagnetic anchor dampens and the magnet armature quickly returns to its rest position. The effectiveness of the nip depends on the minimum
Spalthöhe des Quetschspaltes ab. Bei vorbekannten Einspritzventilen ist der zweite Anschlag an einer Anschlaghülse ausgebildet. Die Anschlaghülse wiederum ist auf der Ventilnadel verschweißt. Bei diesem Verschweißen erfolgt ein Verkippen der Anschlaghülse und somit auch des zweiten Anschlags gegenüber der Ventilnadel, wodurch die Spalthöhe des Quetschspaltes ungünstig verändert wird. Dies wird erfindungsgemäß dadurch vermieden, dass das Führungselement, an dem der zweite Anschlag ausgebildet ist, gleichzeitig zur Führung des Magnetankers verwendet wird. Infolgedessen ist ein Gap height of the squeeze gap. In prior art injectors, the second stop is formed on a stop sleeve. The stop sleeve in turn is welded to the valve needle. In this welding, a tilting of the stop sleeve and thus also of the second stop against the valve needle, whereby the gap height of the nip is changed unfavorably. This is inventively avoided by that the guide element, on which the second stop is formed, is simultaneously used to guide the magnet armature. As a result, one is
vorbestimmter Winkel zwischen dem zweiten Anschlag und der Führungsfläche des Magnetankers fest vorgegeben und bleibt auch bei dem Schweißvorgang unverändert. predetermined angle between the second stop and the guide surface of the armature fixed and remains unchanged even during the welding process.
Die Unteransprüche zeigen bevorzugte Weiterbildungen der Erfindung. The dependent claims show preferred developments of the invention.
Das Führungselement ist bevorzugt als eine auf die Ventilnadel aufgesteckte Hülse ausgebildet ist. Alternativ verlängert das Führungselement als massiver Körper die Ventilnadel in Längsrichtung. The guide element is preferably designed as a plugged onto the valve needle sleeve. Alternatively, the guide element extends as a solid body, the valve needle in the longitudinal direction.
Vorzugsweise ist vorgesehen, dass der erste Anschlag an einem Ring ausgebildet. Dieser Ring ist auf das Führungselement aufgesteckt. Insbesondere wird der Ring mit dem Führungselement verschweißt. Der Abstand zwischen den beiden Anschlägen abzüglich der Höhe des Magnetankers definiert den It is preferably provided that the first stopper formed on a ring. This ring is attached to the guide element. In particular, the ring is welded to the guide element. The distance between the two stops minus the height of the armature defines the
Ankerfreiweg. Dieser wird durch positionieren des Rings auf dem Ankerfreiweg. This is done by positioning the ring on the
Führungselement eingestellt. Guide element adjusted.
Der Ring ist bevorzugt im Querschnitt L-förmig ausgestaltet. Die Verschweißung zwischen Ring und Führungselement erfolgt vorzugsweise auf der The ring is preferably designed in cross-section L-shaped. The welding between ring and guide element is preferably carried out on the
auslassabgewandten Seite des ersten Anschlags. outlet side facing away from the first stop.
Das Führungselement wird bevorzugt mit der Ventilnadel verschweißt. Die Schweißnaht wird dabei vorzugsweise lediglich auf der der auslasszugewandten Seite des zweiten Anschlags gesetzt. The guide element is preferably welded to the valve needle. The weld is preferably set only on the side facing the outlet of the second stop.
Des Weiteren ist bevorzugt vorgesehen, dass das Führungselement gemeinsam mit dem zweiten Anschlag als einstückiges Dreh- oder Frästeil gefertigt ist. Furthermore, it is preferably provided that the guide element is made together with the second stop as a one-piece turned or milled part.
Vorzugsweise steht der zweite Anschlag rechtwinklig vom Führungselement ab. Preferably, the second stop is perpendicular from the guide element.
Das Führungselement weist insbesondere eine zylindrische Außenfläche auf, auf der der Magnetanker geführt ist. The guide element has in particular a cylindrical outer surface on which the magnet armature is guided.
Kurze Beschreibung der Zeichnung Nachfolgend werden Ausführungsbeispiele der Erfindung unter Bezugnahme auf die begleitende Zeichnung im Detail beschrieben. Dabei zeigen: Short description of the drawing Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings. Showing:
Figur 1 ein erfindungsgemäßes Einspritzventil gemäß allen 1 shows an inventive injection valve according to all
Ausführungsbeispielen,  Embodiments,
Figur 2 ein Detail des erfindungsgemäßen Einspritzventils gemäß Figure 2 shows a detail of the injection valve according to the invention
einem ersten Ausführungsbeispiel, und  a first embodiment, and
Figur ein Detail des erfindungsgemäßen Einspritzventils gemäß FIG. 1 shows a detail of the injection valve according to the invention
einem zweiten Ausführungsbeispiel.  a second embodiment.
Ausführungsformen der Erfindung Embodiments of the invention
Im Folgenden wird anhand der Figuren 1 und 2 ein Einspritzventil 1 nach dem ersten Ausführungsbeispiel im Detail erläutert. Gleiche bzw. funktional gleiche Bauteile sind in allen Ausführungsbeispielen mit denselben Bezugszeichen versehen. In the following, an injection valve 1 according to the first embodiment will be explained in detail with reference to Figures 1 and 2. Identical or functionally identical components are provided with the same reference numerals in all embodiments.
Das Einspritzventil 1 umfasst ein Gehäuse 2. Das Gehäuse 2 ist in Figur 1 lediglich teilweise und schematisch dargestellt. An einer Auslassseite 3 des Einspritzventils 1 ist zumindest eine Spritzöffnung 4 im Gehäuse 2 ausgebildet. Des Weiteren trägt das Gehäuse 2 eine Magnetspule 5. The injection valve 1 comprises a housing 2. The housing 2 is shown only partially and schematically in FIG. At least one injection opening 4 in the housing 2 is formed on an outlet side 3 of the injection valve 1. Furthermore, the housing 2 carries a magnetic coil 5.
Das Einspritzventil 1 umfasst ferner einen Magnetanker 6 und eine Ventilnadel 7 mit einer Kugel 8. The injection valve 1 further comprises a magnet armature 6 and a valve needle 7 with a ball 8.
Der Magnetanker 6 ist entlang einer Längsachse 23 zwischen einem ersten Anschlag 1 1 und einem zweiten Anschlag 12 linear beweglich. Der Abstand zwischen den beiden Anschlägen 1 1 , 12 definiert einen Ankerfreiweg 13. Eine erste Feder 9 belastet die Ventilnadel 7 in Richtung der Auslassseite 3. Eine zweite Feder 12 ist über einen Federtopf 14 an dem Magnetanker 6 angebunden. Die zweite Feder 10 belastet den Magnetanker 6 über den Federtopf 14 ebenfalls in Richtung der Auslassseite 3, so dass der Magnetanker 6 durch die Kraft der zweiten Feder 10 am zweiten Anschlag 12 anliegt. Im Magnetanker 6 sind Kanäle 15 ausgebildet. Durch die Kanäle 15 kann der einzuspritzende Brennstoff fließen. Zusätzlich oder alternativ zu den Kanälen 15 kann auch die Ventilnadel 7 als Hohlnadel ausgebildet sein. The armature 6 is linearly movable along a longitudinal axis 23 between a first stop 1 1 and a second stop 12. The distance between the two stops 1 1, 12 defines a Ankerfreiweg 13. A first spring 9 loads the valve needle 7 in the direction of the outlet side 3. A second spring 12 is connected via a spring cup 14 to the armature 6. The second spring 10 also loads the magnet armature 6 via the spring cup 14 in the direction of the outlet side 3, so that the armature 6 rests against the second stop 12 by the force of the second spring 10. In the armature 6 channels 15 are formed. Through the channels 15 of the fuel to be injected can flow. Additionally or alternatively to the channels 15 and the valve needle 7 may be formed as a hollow needle.
Figur 2 zeigt einen Detailausschnitt des Einspritzventils 1. Anhand von Figur 2 ist gut zu sehen, dass auf der Ventilnadel 7 ein Führungselement 16, ausgebildet als Hülse 16, steckt. Integraler Bestandteil des Führungselements 16 ist der zweite Anschlag 12. Das Führungselement 16 samt dem zweiten Anschlag 12 ist als ein einstückiges Drehteil gefertigt. Das Führungselement 16 erstreckt sich über eine Führungselementlänge 21 . Der Magnetanker 6 erstreckt sich über eine Magnetankerlänge 22. Die Längen werden dabei parallel zur Längsachse 23 gemessen. Die Führungselementlänge 21 ist wesentlich länger als die Figure 2 shows a detail of the injection valve 1. With reference to Figure 2 is easy to see that on the valve needle 7, a guide member 16, formed as a sleeve 16, inserted. An integral part of the guide member 16 is the second stop 12. The guide member 16 together with the second stop 12 is made as a one-piece rotary member. The guide element 16 extends over a guide element length 21. The magnet armature 6 extends over a magnet armature length 22. The lengths are measured parallel to the longitudinal axis 23. The guide element length 21 is much longer than the
Magnetankerlänge 22. Dadurch kann das Führungselement 16 mit seiner Außenfläche 18 den Magnetanker 6 vollständig führen. Durch die integrale Ausbildung des zweiten Anschlags 12 am Führungselement 16 ist ein definierter Winkel, insbesondere von 90°, zwischen der Außenfläche 18 und dem zweiten Anschlag 12 gegeben. Magnetic anchor length 22. As a result, the guide element 16 with its outer surface 18, the armature 6 complete. Due to the integral design of the second stop 12 on the guide element 16, a defined angle, in particular of 90 °, between the outer surface 18 and the second stop 12 is given.
Auf dem Führungselement 16 steckt ein Ring 17. An dem Ring 17 ist der erste Anschlag 1 1 ausgebildet. Der Ring 17 ist im Querschnitt L-förmig. Der Ring 17 ist über eine erste Schweißnaht 19 mit dem Führungselement 16 verbunden. Das Führungselement 16 wiederum ist mit einer zweiten Schweißnaht 20 mit der Ventilnadel 7 verbunden. On the guide member 16 is a ring 17. At the ring 17, the first stop 1 1 is formed. The ring 17 is L-shaped in cross section. The ring 17 is connected via a first weld 19 with the guide member 16. The guide element 16 in turn is connected to the valve needle 7 with a second weld 20.
Fig. 3 zeigt ein Detail eines zweiten Ausführungsbeispiels. Im zweiten Fig. 3 shows a detail of a second embodiment. In the second
Ausführungsbeispiel ist das Führungselement 16 nicht als Hülse, sondern als massiver Körper ausgebildet. Die Ventilnadel 7 endet unterhalb des Embodiment, the guide member 16 is not formed as a sleeve, but as a solid body. The valve needle 7 ends below the
Führungselements 16. Das Führungselement 16 verlängert die Ventilnadel 7 entlang der Längsachse 23 zumindest bis zum Ring 17. Guide element 16. The guide element 16 extends the valve needle 7 along the longitudinal axis 23 at least to the ring 17th
Das erfindungsgemäße Führungselement 16 beider Ausführungsbeispiele vereint somit die Führungs- und Anschlagsfunktion. Die Ausführungsbeispiele können mit einer hohlen oder mit einer massiven Ventilnadel 7 gebaut werden, die im allgemeinen nicht symmetrisch sein muss. Der Ring 17 über die erste Schweißnaht 19 mit der Hülse 16 verbunden, wobei hier über verschieben des Rings 17 der gewünschte Ankerfreiweg 13 kostengünstig einstellbar ist. The guide element 16 according to the invention of both embodiments thus combines the guiding and stop function. The embodiments can be constructed with a hollow or with a solid valve needle 7, which generally does not have to be symmetrical. The ring 17 over the first Weld 19 connected to the sleeve 16, in which case the desired Ankerfreiweg 13 is cost-effectively adjustable by moving the ring 17.
Vorzugsweise wird das Führungselement 16 so ausgestaltet, dass die zur Führung dienende Außenfläche 18 und die dazu rechtwinklige Fläche des zweiten Anschlags 12 in einer Aufspannung gefertigt, beispielsweise gedreht und/oder geschliffen, werden können. Die Schweißnähte 19, 20 sind vorzugsweise so weit von der Führungs- und Anschlagsfläche entfernt, dass diese Flächen nicht durch den Schweißprozess verzogen werden. Preferably, the guide member 16 is configured so that the serving for guiding outer surface 18 and the rectangular surface of the second stop 12 made in one setting, for example, rotated and / or ground, can be. The welds 19, 20 are preferably so far away from the guide and stop surface that these surfaces are not distorted by the welding process.

Claims

Ansprüche claims
1 . Einspritzventil (1 ) zum Einspritzen eines Mediums, insbesondere zum 1 . Injection valve (1) for injecting a medium, in particular for
Einspritzen von Brennstoff in einen Brennraum, umfassend:  Injecting fuel into a combustion chamber, comprising:
ein Gehäuse (2) mit zumindest einer Spritzöffnung (4) an einer Auslassseite (3),  a housing (2) with at least one injection opening (4) on an outlet side (3),
eine Magnetspule (5),  a magnetic coil (5),
einen durch die Magnetspule (5) linearbeweglichen Magnetanker (6), eine linearbewegliche Ventilnadel (7) zum Öffnen und Schließen der Spritzöffnung (4),  a magnet armature (6) linearly movable by the magnet coil (5), a linearly movable valve needle (7) for opening and closing the injection opening (4),
einen ersten Anschlag (1 1 ) auf einer auslassabgewandten Seite des Magnetankers (6) und einen zweiten Anschlag (12) auf einer auslasszugewandten Seite des Magnetankers (6), wobei der Magnetanker (6) zwischen dem ersten Anschlag (1 1 ) und dem zweiten Anschlag (12) gegenüber der Ventilnadel (7) linearbeweglich ist, und  a first stop (1 1) on an outlet side facing away from the armature (6) and a second stop (12) on an outlet side facing the armature (6), wherein the armature (6) between the first stop (1 1) and the second Stop (12) relative to the valve needle (7) is linearly movable, and
eine an die Ventilnadel (7) gefügtes Führungselement (16), wobei eine Außenfläche (18) des Führungselementes (16) als Führung für die Linearbewegung des Magnetankers (6) dient, und wobei der zweite Anschlag (12) integraler Bestandteil des Führungselementes (16) ist.  a guide element (16) joined to the valve needle (7), wherein an outer surface (18) of the guide element (16) serves as a guide for the linear movement of the magnet armature (6), and wherein the second stop (12) forms an integral part of the guide element (16 ).
2. Einspritzventil nach Anspruch 1 , dadurch gekennzeichnet, dass der erste Anschlag (1 1 ) an einem Ring (17) ausgebildet ist, wobei der Ring (17) auf dem Führungselement (16) aufgesteckt ist. 2. Injection valve according to claim 1, characterized in that the first stop (1 1) on a ring (17) is formed, wherein the ring (17) is mounted on the guide element (16).
3. Einspritzventil nach Anspruch 2, dadurch gekennzeichnet, dass der Ring (17) mit dem Führungselement (16) verschweißt ist. 3. Injection valve according to claim 2, characterized in that the ring (17) with the guide element (16) is welded.
4. Einspritzventil nach einem der Ansprüche 2 oder 3, dadurch 4. Injection valve according to one of claims 2 or 3, characterized
gekennzeichnet, dass der Ring (17) im Querschnitt L-förmig ist. characterized in that the ring (17) is L-shaped in cross-section.
5. Einspritzventil nach einem der Ansprüche 3 oder 4, dadurch 5. Injection valve according to one of claims 3 or 4, characterized
gekennzeichnet, dass der Ring (17) lediglich auf der auslassabgewandten Seite des ersten Anschlags (1 1 ) mit dem Führungselement (16) verschweißt ist.  in that the ring (17) is welded to the guide element (16) only on the side of the first stop (11) remote from the outlet.
6. Einspritzventil nach einem der vorhergehenden Ansprüche, dadurch 6. Injection valve according to one of the preceding claims, characterized
gekennzeichnet, dass das Führungselement (16) mit der Ventilnadel (7) verschweißt ist.  in that the guide element (16) is welded to the valve needle (7).
7. Einspritzventil nach Anspruch 6, dadurch gekennzeichnet, dass das 7. Injection valve according to claim 6, characterized in that the
Führungselement (16) lediglich auf der auslasszugewandten Seite des zweiten Anschlags (12) mit der Ventilnadel (7) verschweißt ist.  Guide element (16) only on the outlet-facing side of the second stop (12) with the valve needle (7) is welded.
8. Einspritzventil nach einem der vorhergehenden Ansprüche, dadurch 8. Injection valve according to one of the preceding claims, characterized
gekennzeichnet, dass das Führungselement (16) gemeinsam mit dem zweiten Anschlag (12) als ein einstückiges Dreh- oder Frästeil gefertigt ist.  characterized in that the guide element (16) is made together with the second stop (12) as a one-piece turned or milled part.
9. Einspritzventil nach einem der vorhergehenden Ansprüche, dadurch 9. Injection valve according to one of the preceding claims, characterized
gekennzeichnet, dass der zweite Anschlag (12) rechtwinklig von dem Führungselement (16) absteht.  characterized in that the second stop (12) projects at right angles from the guide element (16).
10. Einspritzventil nach einem der vorhergehenden Ansprüche, dadurch 10. Injection valve according to one of the preceding claims, characterized
gekennzeichnet, dass das Führungselement (15) als eine auf die  characterized in that the guide element (15) as one on the
Ventilnadel (7) aufgesteckte Hülse ausgebildet ist, oder dass das  Valve needle (7) plugged sleeve is formed, or that the
Führungselement (15) als ein die Ventilnadel (7) verlängerndes Element ausgebildet ist.  Guide element (15) is designed as a valve needle (7) extending element.
EP13739435.9A 2012-09-06 2013-07-22 Injection valve Not-in-force EP2893182B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012215779.4A DE102012215779A1 (en) 2012-09-06 2012-09-06 Injector
PCT/EP2013/065372 WO2014037142A1 (en) 2012-09-06 2013-07-22 Injection valve

Publications (2)

Publication Number Publication Date
EP2893182A1 true EP2893182A1 (en) 2015-07-15
EP2893182B1 EP2893182B1 (en) 2016-09-14

Family

ID=48808356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13739435.9A Not-in-force EP2893182B1 (en) 2012-09-06 2013-07-22 Injection valve

Country Status (6)

Country Link
US (1) US9518542B2 (en)
EP (1) EP2893182B1 (en)
JP (1) JP6111334B2 (en)
KR (1) KR102116698B1 (en)
DE (1) DE102012215779A1 (en)
WO (1) WO2014037142A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016042753A1 (en) * 2014-09-17 2016-03-24 株式会社デンソー Fuel injection valve
JP6544416B2 (en) * 2017-12-06 2019-07-17 株式会社デンソー Fuel injection valve
DE102018201951A1 (en) * 2018-02-08 2019-08-08 Robert Bosch Gmbh Valve for metering a fluid

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DE19849210A1 (en) * 1998-10-26 2000-04-27 Bosch Gmbh Robert Fuel injection valve for internal combustion engine fuel injection system has armature movable between two stops, damping spring arranged between second stop and armature
US6123275A (en) * 1999-08-12 2000-09-26 Delphi Technologies, Inc. Dual gap fuel injector
DE19946602A1 (en) * 1999-09-29 2001-04-12 Bosch Gmbh Robert Fuel injector
DE19957172A1 (en) * 1999-11-27 2001-08-09 Bosch Gmbh Robert Fuel injector
DE10036811A1 (en) * 2000-07-28 2002-02-07 Bosch Gmbh Robert Fuel injector
DE10046304C1 (en) * 2000-09-19 2002-06-06 Bosch Gmbh Robert Method of manufacturing a valve seat body of a fuel injector
DE10108945A1 (en) * 2001-02-24 2002-09-05 Bosch Gmbh Robert Fuel injector
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JP2006017101A (en) * 2004-06-02 2006-01-19 Denso Corp Fuel injection valve
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Also Published As

Publication number Publication date
KR102116698B1 (en) 2020-06-01
JP2015526646A (en) 2015-09-10
DE102012215779A1 (en) 2014-03-06
KR20150048145A (en) 2015-05-06
JP6111334B2 (en) 2017-04-05
WO2014037142A1 (en) 2014-03-13
US9518542B2 (en) 2016-12-13
EP2893182B1 (en) 2016-09-14
US20150240765A1 (en) 2015-08-27

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