EP2811150A1 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

Info

Publication number
EP2811150A1
EP2811150A1 EP14165390.7A EP14165390A EP2811150A1 EP 2811150 A1 EP2811150 A1 EP 2811150A1 EP 14165390 A EP14165390 A EP 14165390A EP 2811150 A1 EP2811150 A1 EP 2811150A1
Authority
EP
European Patent Office
Prior art keywords
valve needle
valve
duplex steel
needle
fuel injection
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
EP14165390.7A
Other languages
German (de)
French (fr)
Other versions
EP2811150B1 (en
Inventor
Max Seitter
Tatjana Miokovic
Frank Sarfert
Lutz Wondraczek
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 EP2811150A1 publication Critical patent/EP2811150A1/en
Application granted granted Critical
Publication of EP2811150B1 publication Critical patent/EP2811150B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F02M51/0635—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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/166—Selection of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • 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
    • F02M2200/05—Fuel-injection apparatus having means for preventing corrosion
    • 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
    • F02M2200/07—Fuel-injection apparatus having means for avoiding sticking of valve or armature, e.g. preventing hydraulic or magnetic sticking of parts
    • 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
    • F02M2200/08—Fuel-injection apparatus having special means for influencing magnetic flux, e.g. for shielding or guiding magnetic flux
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • F02M2200/9061—Special treatments for modifying the properties of metals used for fuel injection apparatus, e.g. modifying mechanical or electromagnetic properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/188—Spherical or partly spherical shaped valve member ends

Definitions

  • the present invention relates to an electromagnetically operable fuel injector with a valve needle which is at least partially made of duplex steel.
  • Electromagnetically actuable fuel injection valves are known from the prior art in different embodiments.
  • a valve needle is usually arranged on a magnet armature, wherein for an injection process, the valve needle is brought by means of electromagnetic force from a closed state to an open state and back to the closed state.
  • martensitic materials have hitherto been used, which are selected in particular from the aspects of their thermal expansion behavior and their wear resistance.
  • a disadvantage of these martensitic materials are their magnetic properties.
  • an undesirable magnetic flux from a magnet armature via the valve needle to an inner pole occur.
  • switching times can be negatively influenced and, in particular, a magnetic sticking of the valve needle at the inner pole can be intensified.
  • the electromagnetically actuated fuel injection valve according to the invention with the features of claim 1 has the advantage over that the valve needle has only a very small saturation induction. Furthermore, the valve needle according to the invention has a high wear resistance in particular on impact wear. This is particularly important for the life and injection accuracy of the fuel injection valve, since the valve needle can hit a stop at maximum opening and is thus exposed to a high impact load. Furthermore, the valve needle according to the invention can be provided inexpensively and in particular a weldability of the valve needle is ensured. As a result, very inexpensive manufacturing processes can be used. This is inventively achieved in that the valve needle is at least partially made of a duplex steel. The duplex steel comprises a first ferritic or martensitic structure and a second, austenitic structure.
  • duplex stainless steel valve needle As a result, a low thermal expansion and / or a high strength, in particular a high surface hardness and a high wear resistance is achieved.
  • Another advantage of the partially constructed duplex stainless steel valve needle is its corrosion resistance to fuel since the fuel is in direct contact with the valve needle.
  • the valve needle made of duplex steel also has a low saturation induction in the austenitic dominated region (magnetizability), whereby magnetic leakage currents can be avoided via the valve needle.
  • the valve needle is made entirely of duplex steel.
  • the valve needle can be produced in a particularly simple and cost-effective manner.
  • a needle shaft can be connected to a valve ball by means of a welded connection.
  • fuel can wet the entire valve needle.
  • the austenitic structure is arranged island-like in the first ferritic microstructure. As a result, a relatively uniform distribution of the austenitic structure within a ferritic matrix can be obtained.
  • the valve needle further comprises a first anchor stopper made of duplex steel and / or a second anchor stopper also made of duplex steel.
  • the first and second anchor stop serve as stops for a magnet armature, which preferably displaceable between the first and second armature stop is arranged.
  • the valve needle further comprises a guide portion for the armature, which is arranged between the first and second armature stop, wherein the guide portion is also made of duplex steel. As a result, the guide region has a high resistance to wear.
  • a saturation induction of the valve needle made of duplex steel is between 0 to 1 Tesla, in particular between 0 and 0.8 Tesla and particularly preferably ⁇ 0.5 Tesla.
  • a saturation induction ⁇ 0.5 Tesla magnetic leakage currents through the valve needle are so small that there are no disadvantages in terms of higher switching speeds and dynamics of the fuel injection valve or an unwanted Ankerkleben.
  • a component at least partially surrounding the valve needle e.g. a valve housing and / or a valve sleeve
  • the fuel injection valve also made of duplex steel or martensitic or ferritic steel.
  • the same duplex steel is used as for the production of the valve needle.
  • the duplex steel for the valve needle is preferably a 1.4362 (X2CrNiN23-4) steel. Particularly preferred is a volume fraction of the first ferritic microstructure equal to a volume fraction of the second austenitic microstructure. More preferably, the duplex steel of the invention comprises one or more alloying constituents, such as e.g. Cr, Ni, N, Mn.
  • the invention relates to a method for producing a valve needle of a fuel injection valve, wherein according to the invention in a first step, a valve needle is at least partially, preferably completely, made of a duplex steel and in a second step, a surface hardness of the valve needle is increased and / or the local structural properties accordingly be adapted to the functional requirements with regard to wear and / or magnetizability.
  • the increase in the surface hardness or the targeted microstructure modification is particularly preferably by means of a heat treatment (low temperature Aufsticken / -Avemkohlen or High temperature Aufsticken / -conomkohlen) performed.
  • the step of heat treatment thereby increases a wear resistance of the valve needle with constant corrosion resistance.
  • the outstanding corrosion-resistant properties of the duplex steel are not impaired.
  • hardening is achieved by a diffusion process.
  • carbon and / or nitrogen atoms diffuse into the existing interstices, which leads to compressive stresses on the surface in the case of large amounts of carbon which has diffused in, as a result of which a very high surface hardness is achieved.
  • the microstructure composition in the direction of ferritic / martensitic or austenitic microstructure can be controlled. This allows specific local magnetic properties to be achieved in the component.
  • a local heat treatment, in particular of the needle shaft, the valve needle by which a local structural transformation is generated locally generates a lower magnetizability of the component or has a lower coefficient of thermal expansion.
  • the thermal expansion coefficient can thus be adjusted so that it corresponds to that of the valve sleeve and thus different thermal expansion between the valve housing and valve needle can be reduced.
  • the thermal expansion coefficient is preferably about 10 to 12 ⁇ 10 -6 K -1 .
  • valve needle guide surfaces on the valve needle, in particular by means of polishing or the like, reworked.
  • FIG. 1 a fuel injection valve 1 according to a first preferred embodiment of the invention described in detail.
  • the fuel injection valve 1 comprises a valve needle 2 and a magnet armature 3 and an inner pole 4. Further, a coil 5 is provided, which attracts the magnet armature 3 in the direction of the inner pole 4 when energized.
  • FIG. 1 shows the starting position of the fuel injection valve 1, which is the closed position of the fuel injection valve 1 in this embodiment.
  • the valve needle 2 rests on a valve seat 9, whereby a connection to injection openings 8 is interrupted.
  • the valve needle 2 comprises an elongated needle shaft 20 and a valve ball 23.
  • the valve ball 23 is welded to the needle shaft 20 by means of a welded connection 25. Since the valve needle 20 is made entirely of a duplex steel, the valve ball 23 can be welded to the needle shaft 20.
  • the valve needle 2 further comprises a first armature stop 21 and a second armature stop 22.
  • the magnet armature 3 is arranged between the first and second armature stop 21, 22. In this case, a guide region 24 for the magnet armature 3 is provided on the valve needle 2.
  • the guide region 24 for the magnet armature has a Vickers hardness of ⁇ 600 HV10.
  • valve needle 2 Since all components of the valve needle 2 are made of duplex steel, the valve needle 2 has only a very small magnetic saturation induction. As a result, in particular magnetic leakage currents are avoided via the valve needle 2.
  • the use of a duplex steel thereby provides a high corrosion resistance especially against fuel.
  • the fuel injection valve 1 comprises a valve housing 10.
  • the valve housing 10 is preferably likewise made of duplex steel, particularly preferably of the same duplex steel as the valve needle 2. As a result, an equal thermal expansion coefficient for the valve needle 2 and the valve housing 10 is obtained.
  • valve needle 2 Since all components of the valve needle 2 are made of duplex steel, for example, the first and / or second anchor stop 21, 22 by means of a forming process, for example, a compression method, are prepared. Furthermore, the valve needle 2 has a relatively high strength with good ductility. Furthermore, by a specific heat treatment of partial regions of the valve needle 2, a respectively different microstructure composition or a microstructure distribution can be achieved, whereby certain component properties, in particular improved hardnesses or locally different magnetizabilities or locally different thermal expansion coefficients, can be set.
  • the guide portion 24 for the armature 3 is provided, and the guide portion 24 is also made of duplex steel and subjected to a heat treatment.
  • the ferritic / austenitic structure can be adjusted to obtain a coefficient of thermal expansion in the range of 10 to 12 ⁇ 10 -6 K -1 , while maintaining the hardness of the duplex steel.

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

Die vorliegende Erfindung betrifft ein Kraftstoffeinspritzventil, umfassend eine Ventilnadel (2), einen Magnetaktor mit einem Magnetanker (3) und einem Innenpol (4), und ein Rückstellelement (6), wobei die Ventilnadel (2) zumindest teilweise aus einem Duplexstahl hergestellt ist und wobei der Duplexstahl ein erstes ferritisches Gefüge und ein zweites austenitisches Gefüge aufweist.The present invention relates to a fuel injection valve, comprising a valve needle (2), a magnetic actuator with a magnet armature (3) and an inner pole (4), and a return element (6), wherein the valve needle (2) is at least partially made of a duplex steel and wherein the duplex steel has a first ferritic microstructure and a second austenitic microstructure.

Description

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft ein elektromagnetisch betätigbares Kraftstoffeinspritzventil mit einer Ventilnadel, welche zumindest teilweise aus Duplexstahl hergestellt ist.The present invention relates to an electromagnetically operable fuel injector with a valve needle which is at least partially made of duplex steel.

Elektromagnetisch betätigbare Kraftstoffeinspritzventile sind aus dem Stand der Technik in unterschiedlichen Ausgestaltungen bekannt. Hierbei ist üblicherweise eine Ventilnadel an einem Magnetanker angeordnet, wobei für einen Einspritzvorgang die Ventilnadel mittels elektromagnetischer Kraft von einem geschlossenen Zustand in einen geöffneten Zustand und wieder zurück in den geschlossenen Zustand gebracht wird. Da im Betrieb Wärmedehnungen der Ventilnadel auftreten können, werden bisher martensitische Werkstoffe verwendet, welche insbesondere unter den Aspekten ihres Wärmedehnungsverhaltens und ihrer Verschleißbeständigkeit ausgewählt werden. Ein Nachteil dieser martensitischen Werkstoffe sind jedoch ihre magnetischen Eigenschaften. Hierdurch kann ein unerwünschter magnetischer Fluss von einem Magnetanker über die Ventilnadel zu einem Innenpol auftreten. Hierdurch können jedoch Schaltzeiten negativ beeinflusst werden und insbesondere ein magnetisches Kleben der Ventilnadel am Innenpol verstärkt werden.Electromagnetically actuable fuel injection valves are known from the prior art in different embodiments. Here, a valve needle is usually arranged on a magnet armature, wherein for an injection process, the valve needle is brought by means of electromagnetic force from a closed state to an open state and back to the closed state. Since thermal expansion of the valve needle may occur during operation, martensitic materials have hitherto been used, which are selected in particular from the aspects of their thermal expansion behavior and their wear resistance. A disadvantage of these martensitic materials, however, are their magnetic properties. As a result, an undesirable magnetic flux from a magnet armature via the valve needle to an inner pole occur. As a result, however, switching times can be negatively influenced and, in particular, a magnetic sticking of the valve needle at the inner pole can be intensified.

Offenbarung der ErfindungDisclosure of the invention

Das erfindungsgemäße elektromagnetisch betätigbare Kraftstoffeinspritzventil mit den Merkmalen des Anspruchs 1 weist demgegenüber den Vorteil auf, dass die Ventilnadel nur eine sehr geringe Sättigungsinduktion aufweist. Weiterhin weist die erfindungsgemäße Ventilnadel eine hohe Verschleißfestigkeit insbesondere bei Schlagverschleiß auf. Dies ist besonders für die Lebensdauer und Einspritzgenauigkeit des Kraftstoffeinspritzventils wichtig, da die Ventilnadel bei maximaler Öffnung gegen einen Anschlag stoßen kann und somit einer hohen Schlagbelastung ausgesetzt ist. Weiterhin kann die erfindungsgemäße Ventilnadel kostengünstig bereitgestellt werden und insbesondere ist eine Schweißbarkeit der Ventilnadel sichergestellt. Dadurch können sehr kostengünstige Herstellungsverfahren verwendet werden. Dies wird erfindungsgemäß dadurch erreicht, dass die Ventilnadel zumindest teilweise aus einem Duplexstahl hergestellt ist. Der Duplexstahl umfasst dabei ein erstes ferritisches oder martensitisches Gefüge und ein zweites, austenitisches Gefüge. Hierdurch wird eine geringe Wärmedehnung und/oder eine hohe Festigkeit, insbesondere eine hohe Oberflächenhärte und eine hohe Verschleißfestigkeit, erreicht. Ein weiterer Vorteil der teilweise aus Duplexstahl hergestellten Ventilnadel ist ihre Korrosionsbeständigkeit gegenüber Kraftstoff, da der Kraftstoff direkt mit der Ventilnadel in Kontakt steht. Die aus Duplexstahl hergestellte Ventilnadel weist ferner eine geringe Sättigungsinduktion im austenitisch dominierten Bereich (Magnetisierbarkeit) auf, wodurch magnetische Verlustströme über die Ventilnadel vermieden werden können.The electromagnetically actuated fuel injection valve according to the invention with the features of claim 1 has the advantage over that the valve needle has only a very small saturation induction. Furthermore, the valve needle according to the invention has a high wear resistance in particular on impact wear. This is particularly important for the life and injection accuracy of the fuel injection valve, since the valve needle can hit a stop at maximum opening and is thus exposed to a high impact load. Furthermore, the valve needle according to the invention can be provided inexpensively and in particular a weldability of the valve needle is ensured. As a result, very inexpensive manufacturing processes can be used. This is inventively achieved in that the valve needle is at least partially made of a duplex steel. The duplex steel comprises a first ferritic or martensitic structure and a second, austenitic structure. As a result, a low thermal expansion and / or a high strength, in particular a high surface hardness and a high wear resistance is achieved. Another advantage of the partially constructed duplex stainless steel valve needle is its corrosion resistance to fuel since the fuel is in direct contact with the valve needle. The valve needle made of duplex steel also has a low saturation induction in the austenitic dominated region (magnetizability), whereby magnetic leakage currents can be avoided via the valve needle.

Die Unteransprüche zeigen bevorzugte Weiterbildungen der Erfindung.The dependent claims show preferred developments of the invention.

Besonders bevorzugt ist die Ventilnadel vollständig aus Duplexstahl hergestellt. Hierdurch kann die Ventilnadel besonders einfach und kostengünstig hergestellt werden. Beispielsweise kann ein Nadelschaft mit einer Ventilkugel mittels einer Schweißverbindung verbunden werden. Auch kann Kraftstoff die komplette Ventilnadel benetzen.Particularly preferably, the valve needle is made entirely of duplex steel. As a result, the valve needle can be produced in a particularly simple and cost-effective manner. For example, a needle shaft can be connected to a valve ball by means of a welded connection. Also, fuel can wet the entire valve needle.

Besonders bevorzugt ist das austenitische Gefüge inselartig im ersten ferritischen Gefüge angeordnet. Dadurch kann eine relativ gleichmäßige Verteilung des austenitischen Gefüges innerhalb einer ferritischen Matrix erhalten werden.Particularly preferably, the austenitic structure is arranged island-like in the first ferritic microstructure. As a result, a relatively uniform distribution of the austenitic structure within a ferritic matrix can be obtained.

Weiter bevorzugt umfasst die Ventilnadel ferner einen ersten Ankeranschlag, welcher aus Duplexstahl hergestellt ist, und/oder einen zweiten Ankeranschlag, welcher ebenfalls aus Duplexstahl hergestellt ist. Der erste und zweite Ankeranschlag dienen dabei als Anschläge für einen Magnetanker, welcher vorzugsweise zwischen dem ersten und zweiten Ankeranschlag verschiebbar angeordnet ist. Die Ventilnadel umfasst ferner einen Führungsbereich für den Magnetanker, welcher zwischen dem ersten und zweiten Ankeranschlag angeordnet ist, wobei der Führungsbereich ebenfalls aus Duplexstahl hergestellt ist. Hierdurch weist der Führungsbereich einen hohen Verschleißwiderstand auf.More preferably, the valve needle further comprises a first anchor stopper made of duplex steel and / or a second anchor stopper also made of duplex steel. The first and second anchor stop serve as stops for a magnet armature, which preferably displaceable between the first and second armature stop is arranged. The valve needle further comprises a guide portion for the armature, which is arranged between the first and second armature stop, wherein the guide portion is also made of duplex steel. As a result, the guide region has a high resistance to wear.

Weiter bevorzugt ist eine Sättigungsinduktion der aus Duplexstahl hergestellten Ventilnadel zwischen 0 bis 1 Tesla, insbesondere zwischen 0 und 0,8 Tesla und besonders bevorzugt ≤ 0,5 Tesla. Bei einer Sättigungsinduktion < 0,5 Tesla sind magnetische Verlustströme über die Ventilnadel so gering, dass keinerlei Nachteile hinsichtlich höheren Schaltgeschwindigkeiten und einer Dynamik des Kraftstoffeinspritzventils bzw. ein unerwünschtes Ankerkleben auftreten.More preferably, a saturation induction of the valve needle made of duplex steel is between 0 to 1 Tesla, in particular between 0 and 0.8 Tesla and particularly preferably ≦ 0.5 Tesla. With a saturation induction <0.5 Tesla magnetic leakage currents through the valve needle are so small that there are no disadvantages in terms of higher switching speeds and dynamics of the fuel injection valve or an unwanted Ankerkleben.

Gemäß einer weiteren bevorzugten Ausgestaltung der Erfindung ist ein die Ventilnadel zumindest teilweise umgebendes Bauteil, z.B. ein Ventilgehäuse und/oder eine Ventilhülse, des Kraftstoffeinspritzventils ebenfalls aus Duplexstahl oder martensitischen oder ferritischen Stahl hergestellt. Vorzugsweise wird hierbei der gleiche Duplexstahl wie zur Herstellung der Ventilnadel verwendet. Hierdurch können insbesondere wärmebedingte Längenänderungen der Ventilnadel durch eine entsprechende Längenänderung des umgebenden Bauteils kompensiert werden, so dass eine hohe Betriebssicherheit und auch Genauigkeit hinsichtlich Einspritzzeiten und Einspritzmengen erhalten wird.According to a further preferred embodiment of the invention, a component at least partially surrounding the valve needle, e.g. a valve housing and / or a valve sleeve, the fuel injection valve also made of duplex steel or martensitic or ferritic steel. Preferably, in this case, the same duplex steel is used as for the production of the valve needle. As a result, in particular heat-induced changes in length of the valve needle can be compensated by a corresponding change in length of the surrounding component, so that a high reliability and accuracy with respect to injection times and injection quantities is obtained.

Der Duplexstahl für die Ventilnadel ist vorzugsweise ein 1.4362 (X2CrNiN23-4)-Stahl. Besonders bevorzugt ist ein Volumenanteil des ersten ferritischen Gefüges gleich einem Volumenanteil des zweiten austenitischen Gefüges. Weiter bevorzugt umfasst der erfindungsgemäße Duplexstahl einen oder mehrere Legierungsbestandteile, wie z.B. Cr, Ni, N, Mn.The duplex steel for the valve needle is preferably a 1.4362 (X2CrNiN23-4) steel. Particularly preferred is a volume fraction of the first ferritic microstructure equal to a volume fraction of the second austenitic microstructure. More preferably, the duplex steel of the invention comprises one or more alloying constituents, such as e.g. Cr, Ni, N, Mn.

Ferner betrifft die Erfindung ein Verfahren zur Herstellung einer Ventilnadel eines Kraftstoffeinspritzventils, wobei erfindungsgemäß in einem ersten Schritt eine Ventilnadel zumindest teilweise, vorzugsweise vollständig, aus einem Duplexstahl hergestellt wird und in einem zweiten Schritt eine Oberflächenhärte der Ventilnadel erhöht wird und/oder die lokalen Gefügeeigenschaften entsprechend der funktionalen Anforderungen hinsichtlich Verschleiß und/oder Magnetisierbarkeit angepasst werden. Die Erhöhung der Oberflächenhärte oder die gezielte Gefügemodifikation wird besonders bevorzugt mittels einer Wärmebehandlung (Niedertemperatur-Aufsticken/-Aufkohlen oder Hochtemperatur-Aufsticken/-Aufkohlen) durchgeführt. Der Schritt der Wärmebehandlung erhöht dabei eine Verschleißfestigkeit der Ventilnadel bei gleichbleibender Korrosionsbeständigkeit. Insbesondere werden dabei die hervorragenden korrosionsbeständigen Eigenschaften des Duplexstahls nicht beeinträchtigt. Bei der Wärmebehandlung wird eine Härtung durch ein Diffusionsverfahren erreicht. Dabei diffundieren Kohlenstoff- und/oder Stickstoffatome in die bestehenden Zwischengitter ein, was bei großen Mengen von eindiffundiertem Kohlenstoff zu Druckspannungen an der Oberfläche führt, wodurch eine sehr hohe Oberflächenhärte erreicht wird. Weiterhin kann durch das gezielte Einbringen von Kohlenstoff- und/oder Stickstoffatomen die Gefügezusammensetzung in Richtung ferritisches/martensitisches oder austenitisches Gefüge gesteuert werden. So lassen sich gezielt lokale magnetische Eigenschaften im Bauteil erzielen. Weiter bevorzugt erfolgt eine lokale Wärmebehandlung, insbesondere des Nadelschafts, der Ventilnadel, durch welche eine lokale Gefügeumwandlung erzeugt wird, die lokal eine geringere Magnetisierbarkeit des Bauteils erzeugt oder einen geringeren Wärmeausdehnungskoeffizient besitzt. Der Wärmeausdehnungskoeffizient kann damit so eingestellt werden, dass er dem der Ventilhülse entspricht und somit unterschiedliche Wärmedehnungen zwischen Ventilgehäuse und Ventilnadel reduziert werden. Der Wärmeausdehnungskoeffizient liegt dabei vorzugsweise bei ungefähr 10 bis 12 x 10-6 K-1.Furthermore, the invention relates to a method for producing a valve needle of a fuel injection valve, wherein according to the invention in a first step, a valve needle is at least partially, preferably completely, made of a duplex steel and in a second step, a surface hardness of the valve needle is increased and / or the local structural properties accordingly be adapted to the functional requirements with regard to wear and / or magnetizability. The increase in the surface hardness or the targeted microstructure modification is particularly preferably by means of a heat treatment (low temperature Aufsticken / -Aufkohlen or High temperature Aufsticken / -Aufkohlen) performed. The step of heat treatment thereby increases a wear resistance of the valve needle with constant corrosion resistance. In particular, the outstanding corrosion-resistant properties of the duplex steel are not impaired. In the heat treatment, hardening is achieved by a diffusion process. In this case, carbon and / or nitrogen atoms diffuse into the existing interstices, which leads to compressive stresses on the surface in the case of large amounts of carbon which has diffused in, as a result of which a very high surface hardness is achieved. Furthermore, by the targeted introduction of carbon and / or nitrogen atoms, the microstructure composition in the direction of ferritic / martensitic or austenitic microstructure can be controlled. This allows specific local magnetic properties to be achieved in the component. More preferably, a local heat treatment, in particular of the needle shaft, the valve needle, by which a local structural transformation is generated locally generates a lower magnetizability of the component or has a lower coefficient of thermal expansion. The thermal expansion coefficient can thus be adjusted so that it corresponds to that of the valve sleeve and thus different thermal expansion between the valve housing and valve needle can be reduced. The thermal expansion coefficient is preferably about 10 to 12 × 10 -6 K -1 .

Weiter bevorzugt werden Führungsflächen an der Ventilnadel, insbesondere mittels Polieren oder dergleichen, nachbearbeitet.Further preferably, guide surfaces on the valve needle, in particular by means of polishing or the like, reworked.

Zeichnungdrawing

Nachfolgend wird ein bevorzugtes Ausführungsbeispiel der Erfindung unter Bezugnahme auf die begleitende Zeichnung im Detail beschrieben. In der Zeichnung ist:

Figur 1
eine schematische Schnittansicht eines Kraftstoffeinspritzventils gemäß einem ersten Ausführungsbeispiel der Erfindung.
Hereinafter, a preferred embodiment of the invention will be described in detail with reference to the accompanying drawings. In the drawing is:
FIG. 1
a schematic sectional view of a fuel injection valve according to a first embodiment of the invention.

Bevorzugte Ausführungsformen der Erfindung Nachfolgend wird unter Bezugnahme auf Figur 1 ein Kraftstoffeinspritzventil 1 gemäß einem ersten bevorzugten Ausführungsbeispiel der Erfindung im Detail beschrieben.Preferred embodiments of the invention The following is with reference to FIG. 1 a fuel injection valve 1 according to a first preferred embodiment of the invention described in detail.

Wie aus Figur 1 ersichtlich ist, umfasst das Kraftstoffeinspritzventil 1 eine Ventilnadel 2 und einen Magnetanker 3 sowie einen Innenpol 4. Ferner ist eine Spule 5 vorgesehen, welche bei Bestromung den Magnetanker 3 in Richtung des Innenpols 4 anzieht.How out FIG. 1 It can be seen, the fuel injection valve 1 comprises a valve needle 2 and a magnet armature 3 and an inner pole 4. Further, a coil 5 is provided, which attracts the magnet armature 3 in the direction of the inner pole 4 when energized.

Ein Rückstellelement 6 ist mit der Ventilnadel 2 verbunden, um die Ventilnadel 2 in die Ausgangsposition zurückzustellen. Figur 1 zeigt dabei die Ausgangsposition des Kraftstoffeinspritzventils 1, welche in diesem Ausführungsbeispiel die geschlossene Position des Kraftstoffeinspritzventils 1 ist. Hierbei liegt die Ventilnadel 2 auf einem Ventilsitz 9 auf, wodurch eine Verbindung zu Einspritzöffnungen 8 unterbrochen ist.A return element 6 is connected to the valve needle 2 to return the valve needle 2 to the starting position. FIG. 1 shows the starting position of the fuel injection valve 1, which is the closed position of the fuel injection valve 1 in this embodiment. In this case, the valve needle 2 rests on a valve seat 9, whereby a connection to injection openings 8 is interrupted.

Die Ventilnadel 2 umfasst einen länglichen Nadelschaft 20 und eine Ventilkugel 23. Die Ventilkugel 23 ist mittels einer Schweißverbindung 25 an den Nadelschaft 20 angeschweißt. Da die Ventilnadel 20 vollständig aus einem Duplexstahl hergestellt ist, kann die Ventilkugel 23 an den Nadelschaft 20 angeschweißt werden. Die Ventilnadel 2 umfasst ferner einen ersten Ankeranschlag 21 und einen zweiten Ankeranschlag 22. Der Magnetanker 3 ist dabei zwischen dem ersten und zweiten Ankeranschlag 21, 22 angeordnet. Hierbei ist an der Ventilnadel 2 ein Führungsbereich 24 für den Magnetanker 3 vorgesehen. Der Führungsbereich 24 für den Magnetanker weist dabei eine Vickershärte von ≥ 600 HV10 auf.The valve needle 2 comprises an elongated needle shaft 20 and a valve ball 23. The valve ball 23 is welded to the needle shaft 20 by means of a welded connection 25. Since the valve needle 20 is made entirely of a duplex steel, the valve ball 23 can be welded to the needle shaft 20. The valve needle 2 further comprises a first armature stop 21 and a second armature stop 22. The magnet armature 3 is arranged between the first and second armature stop 21, 22. In this case, a guide region 24 for the magnet armature 3 is provided on the valve needle 2. The guide region 24 for the magnet armature has a Vickers hardness of ≥ 600 HV10.

Da alle Bauteile der Ventilnadel 2 aus Duplexstahl hergestellt sind, weist die Ventilnadel 2 nur eine sehr geringe magnetische Sättigungsinduktion auf. Hierdurch werden insbesondere magnetische Verlustströme über die Ventilnadel 2 vermieden. Die Verwendung eines Duplexstahls stellt dabei eine hohe Korrosionsbeständigkeit insbesondere auch gegenüber Kraftstoff bereit.Since all components of the valve needle 2 are made of duplex steel, the valve needle 2 has only a very small magnetic saturation induction. As a result, in particular magnetic leakage currents are avoided via the valve needle 2. The use of a duplex steel thereby provides a high corrosion resistance especially against fuel.

Ferner umfasst das Kraftstoffeinspritzventil 1 ein Ventilgehäuse 10. Das Ventilgehäuse 10 ist vorzugsweise ebenfalls aus Duplexstahl hergestellt, besonders bevorzugt aus dem gleichen Duplexstahl wie die Ventilnadel 2. Hierdurch wird ein gleicher Wärmeausdehnungskoeffizient für die Ventilnadel 2 und das Ventilgehäuse 10 erhalten.Furthermore, the fuel injection valve 1 comprises a valve housing 10. The valve housing 10 is preferably likewise made of duplex steel, particularly preferably of the same duplex steel as the valve needle 2. As a result, an equal thermal expansion coefficient for the valve needle 2 and the valve housing 10 is obtained.

Da sämtliche Bauteile der Ventilnadel 2 aus Duplexstahl hergestellt sind, können beispielsweise auch der erste und/oder zweite Ankeranschlag 21, 22 mittels eines Umformverfahrens, beispielsweise eines Stauchverfahrens, hergestellt werden. Weiterhin besitzt die Ventilnadel 2 eine relativ hohe Festigkeit bei guter Duktilität. Ferner kann durch eine gezielte Wärmebehandlung von Teilbereichen der Ventilnadel 2 eine jeweils unterschiedliche Gefügezusammensetzung bzw. eine Gefügeverteilung erreicht werden, wodurch bestimmte Bauteileigenschaften, insbesondere verbesserte Härten oder lokal unterschiedliche Magnetisierbarkeiten oder lokal unterschiedliche Wärmedehnungskoeffizienten, eingestellt werden können.Since all components of the valve needle 2 are made of duplex steel, for example, the first and / or second anchor stop 21, 22 by means of a forming process, for example, a compression method, are prepared. Furthermore, the valve needle 2 has a relatively high strength with good ductility. Furthermore, by a specific heat treatment of partial regions of the valve needle 2, a respectively different microstructure composition or a microstructure distribution can be achieved, whereby certain component properties, in particular improved hardnesses or locally different magnetizabilities or locally different thermal expansion coefficients, can be set.

Hierbei ist zwischen dem ersten und zweiten Ankeranschlag 21, 22 der Führungsbereich 24 für den Magnetanker 3 bereitgestellt, wobei der Führungsbereich 24 ebenfalls aus Duplexstahl hergestellt ist und einer Wärmebehandlung unterzogen wurde. Hierdurch kann das ferritische/austenitische Gefüge derart eingestellt werden, dass ein Wärmeausdehnungskoeffizient im Bereich von 10 bis 12 x 10-6 K-1 erhalten wird, wobei die Härte des Duplexstahls beibehalten wird.Here, between the first and second armature stoppers 21, 22, the guide portion 24 for the armature 3 is provided, and the guide portion 24 is also made of duplex steel and subjected to a heat treatment. By doing so, the ferritic / austenitic structure can be adjusted to obtain a coefficient of thermal expansion in the range of 10 to 12 × 10 -6 K -1 , while maintaining the hardness of the duplex steel.

Claims (10)

Kraftstoffeinspritzventil, umfassend - eine Ventilnadel (2), - einen Magnetaktor mit einem Magnetanker (3) und einem Innenpol (4), und - ein Rückstellelement (6), - wobei die Ventilnadel (2) zumindest teilweise aus einem Duplexstahl hergestellt ist und - wobei der Duplexstahl ein erstes ferritisches oder martensitisches Gefüge und ein zweites austenitisches Gefüge aufweist. Fuel injection valve, comprising a valve needle (2), - A magnetic actuator with a magnetic armature (3) and an inner pole (4), and a reset element (6), - Wherein the valve needle (2) is at least partially made of a duplex steel and - The duplex steel having a first ferritic or martensitic structure and a second austenitic structure. Ventil nach Anspruch 1, dadurch gekennzeichnet, dass die Ventilnadel (2) vollständig aus Duplexstahl hergestellt ist.Valve according to claim 1, characterized in that the valve needle (2) is made entirely of duplex steel. Ventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das zweite, austenitische Gefüge inselartig im ersten, ferritischen oder martensitischen Gefüge des Duplexstahls angeordnet ist.Valve according to one of the preceding claims, characterized in that the second, austenitic structure is arranged island-like in the first, ferritic or martensitic structure of the duplex steel. Ventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ventilnadel (2) ferner einen ersten Ankeranschlag (21) aus Duplexstahl und/oder einen zweiten Ankeranschlag (22) aus Duplexstahl aufweist.Valve according to one of the preceding claims, characterized in that the valve needle (2) further comprises a first anchor stop (21) made of duplex steel and / or a second anchor stop (22) made of duplex steel. Ventil nach Anspruch 4, dadurch gekennzeichnet, dass der Magnetanker (3) zwischen dem ersten und zweiten Ankeranschlag (21, 22) angeordnet ist und die Ventilnadel (2) einen Führungsbereich (24) für den Magnetanker (3) aus Duplexstahl zwischen dem ersten und zweiten Ankeranschlag aufweist.Valve according to claim 4, characterized in that the magnet armature (3) between the first and second armature stop (21, 22) is arranged and the valve needle (2) a guide portion (24) for the armature (3) of duplex steel between the first and having second anchor stop. Ventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ventilnadel (2) eine Sättigungsinduktion zwischen 0 bis 1 Tesla aufweist, insbesondere zwischen 0 bis 0,8 Tesla und weiter insbesondere ≤ 0,5 Tesla aufweist.Valve according to one of the preceding claims, characterized in that the valve needle (2) has a saturation induction between 0 to 1 Tesla, in particular between 0 to 0.8 Tesla and more particularly ≤ 0.5 Tesla. Ventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein die Ventilnadel (2) zumindest teilweise umgebendes Bauteil, insbesondere ein Ventilgehäuse (10), aus Duplexstahl hergestellt ist, insbesondere aus dem gleichen Duplexstahl wie die Ventilnadel (2).Valve according to one of the preceding claims, characterized in that a valve needle (2) at least partially surrounding component, in particular a valve housing (10) is made of duplex steel, in particular from the same duplex steel as the valve needle (2). Verfahren zur Herstellung einer Ventilnadel (2) eines Kraftstoffeinspritzventils (1), umfassend die Schritte: - Herstellen der Ventilnadel (2), wobei zumindest Teilbereiche der Ventilnadel aus Duplexstahl hergestellt sind, und - Erhöhen einer Oberflächenhärte der aus Duplexstahl hergestellten Teilbereiche der Ventilnadel, insbesondere mittels Kolsterisierens. Method for producing a valve needle (2) of a fuel injection valve (1), comprising the steps: - Manufacture of the valve needle (2), wherein at least portions of the valve needle are made of duplex steel, and - Increasing a surface hardness of the duplex steel sections of the valve needle, in particular by Kolsterisierens. Verfahren nach Anspruch 8, gekennzeichnet durch den Schritt des lokalen Erwärmens von aus Duplexstahl hergestellten Teilbereichen, insbesondere eines Nadelschafts der Ventilnadel, zur Einstellung eines ferritischen/austenitischen Gefüges derart, dass ein vorbestimmter Wärmeausdehnungskoeffizient, insbesondere in einem Bereich von 10 bis 12 x 10-6 K-1, erhalten wird.A method according to claim 8, characterized by the step of locally heating duplex steel sections, in particular a needle shaft of the valve needle, to adjust a ferritic / austenitic structure such that a predetermined coefficient of thermal expansion, in particular in a range of 10 to 12 x 10 -6 K -1 , is obtained. Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass an der Ventilnadel (2) Führungsflächen (24), insbesondere mittels Polieren oder dergleichen, hergestellt werden.A method according to claim 8 or 9, characterized in that on the valve needle (2) guide surfaces (24), in particular by means of polishing or the like, are produced.
EP14165390.7A 2013-06-05 2014-04-22 Fuel injection valve Not-in-force EP2811150B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013210397.2A DE102013210397A1 (en) 2013-06-05 2013-06-05 Fuel injection valve

Publications (2)

Publication Number Publication Date
EP2811150A1 true EP2811150A1 (en) 2014-12-10
EP2811150B1 EP2811150B1 (en) 2018-06-13

Family

ID=50513763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14165390.7A Not-in-force EP2811150B1 (en) 2013-06-05 2014-04-22 Fuel injection valve

Country Status (2)

Country Link
EP (1) EP2811150B1 (en)
DE (1) DE102013210397A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018137913A1 (en) * 2017-01-27 2018-08-02 Robert Bosch Gmbh Solenoid valve, internal combustion engine comprising a solenoid valve, and method for producing a solenoid valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11284776B2 (en) 2018-12-22 2022-03-29 Emz-Hanauer Gmbh & Co. Kgaa Tablet dosing system and water-carrying domestic cleaning apparatus equipped therewith

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005037951A1 (en) * 2005-08-11 2007-02-15 Robert Bosch Gmbh Housing for automotive fuel injection valve has heat-treated sleeve with modified magnetic characteristics
US20090289131A1 (en) * 2008-05-22 2009-11-26 Mitsubishi Electric Corporation Fuel injection valve

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211759A (en) * 1983-05-18 1984-11-30 Toyota Motor Corp Fuel injection valve for diesel engine and its manufacture
US5534081A (en) * 1993-05-11 1996-07-09 Honda Giken Kogyo Kabushiki Kaisha Fuel injector component
US20100025500A1 (en) * 2008-07-31 2010-02-04 Caterpillar Inc. Materials for fuel injector components

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005037951A1 (en) * 2005-08-11 2007-02-15 Robert Bosch Gmbh Housing for automotive fuel injection valve has heat-treated sleeve with modified magnetic characteristics
US20090289131A1 (en) * 2008-05-22 2009-11-26 Mitsubishi Electric Corporation Fuel injection valve

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BODYCOTE KOLSTERISING: "Kolsterisieren - Korrosionfestes Oberflächenhärten von austenitischem, rostfreiem Stahl", 31 December 2005 (2005-12-31), XP055143654, Retrieved from the Internet <URL:http://internet.bodycote.org/kolsterising/brochures/147-290_BODY_kolst_DE_FINR.pdf> [retrieved on 20140930] *
DEUTSCHE EDELSTAHLWERKE: "1.4462 Nichtrostender austenitisch-ferritischer Chrom-Nickel-Molybdän-Stahl", INTERNET CITATION, March 2008 (2008-03-01), pages 1 - 4, XP002695797, Retrieved from the Internet <URL:http://www.dew-stahl.com/fileadmin/files/dew-stahl.com/documents/Publikationen/Werkstoffdatenblaetter/RSH/1.4462_de.pdf> [retrieved on 20130422] *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018137913A1 (en) * 2017-01-27 2018-08-02 Robert Bosch Gmbh Solenoid valve, internal combustion engine comprising a solenoid valve, and method for producing a solenoid valve

Also Published As

Publication number Publication date
EP2811150B1 (en) 2018-06-13
DE102013210397A1 (en) 2014-12-11

Similar Documents

Publication Publication Date Title
EP0886727B1 (en) Electromagnetically controlled valve
EP1561225B1 (en) Solenoid plunger system with an adjustable magnetic flux
EP2313896B1 (en) Metallic composite component, in particular for an electromagnetic valve
EP2097913B1 (en) Method for producing a static magnetic circuit component
DE112011104463T5 (en) Solenoid actuator and fuel injector with same
DE102011078407A1 (en) Switching valve for controlling a fuel injector and fuel injector
DE102004060532A1 (en) Device with shape memory element
EP2864624A1 (en) Injection valve
EP2811150B1 (en) Fuel injection valve
DE102012208136A1 (en) Valve for metering fluid
DE112009002373T5 (en) High pressure holding sleeve for a nozzle assembly and fuel injector with the same
DE102008040549A1 (en) Method for producing a metal composite component, in particular for an electromagnetic valve
EP3364015B1 (en) Electromagnetic switching valve and high-pressure fuel pump
WO2014139706A1 (en) Valve for controlling a fluid with increased sealing action
DE102014200521B4 (en) Fuel injector
DE102006046400B4 (en) Device for generating a linear stroke with a magnetic shape memory element
WO2015110199A1 (en) Method for producing a magnetic valve
WO2018137913A1 (en) Solenoid valve, internal combustion engine comprising a solenoid valve, and method for producing a solenoid valve
DE102010039191A1 (en) Fuel injector, particularly common-rail-injector, for injecting fuel in combustion chamber of internal combustion engine, has injection valve element that is adjustable between closing position and open position
DE10327875B4 (en) Immersion anchor system with adjustable magnetic flux
DE112019005957T5 (en) Fuel injector
DE112018006562T5 (en) Electromagnetic valve
EP4090844B1 (en) Needle stroke switch and fuel injector having such a needle stroke switch
DE102010000797A1 (en) Method for manufacturing inner metallic cabinet of fuel injection valve, involves assembling slug with three parts by resistance welding process or plugging process, and transforming slug into component by reforming process
DE102021206186A1 (en) Gas metering valve and method of making same

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20140422

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

R17P Request for examination filed (corrected)

Effective date: 20150610

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20170714

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20180314

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 1008764

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180615

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502014008515

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20180613

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180913

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180913

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180914

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181013

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502014008515

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20190314

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20190419

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20190423

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20190430

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190422

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190422

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190430

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190422

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190422

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181015

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1008764

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190422

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190422

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20140422

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200422

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180613

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20220627

Year of fee payment: 9

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502014008515

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231103