EP2891788A1 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

Info

Publication number
EP2891788A1
EP2891788A1 EP14193141.0A EP14193141A EP2891788A1 EP 2891788 A1 EP2891788 A1 EP 2891788A1 EP 14193141 A EP14193141 A EP 14193141A EP 2891788 A1 EP2891788 A1 EP 2891788A1
Authority
EP
European Patent Office
Prior art keywords
adjusting element
fuel injection
region
injection valve
fuel
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
EP14193141.0A
Other languages
German (de)
French (fr)
Other versions
EP2891788B1 (en
Inventor
Buenyamin Duru
Andreas Glaser
Achim Besemer
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 EP2891788A1 publication Critical patent/EP2891788A1/en
Application granted granted Critical
Publication of EP2891788B1 publication Critical patent/EP2891788B1/en
Active 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
    • F02M51/0664—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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02M2200/09—Fuel-injection apparatus having means for reducing noise
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • F02M2200/9015—Elastomeric or plastic 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/008—Arrangement of fuel passages inside of injectors

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • a fuel injector in which a fuel filter is press-fitted into the fuel inlet port at the upstream end of the fuel injector.
  • This fuel filter is provided at the periphery, for example, with a brass ring which forms the mating with the wall of the Brennscherinlassstutzens when pressing the fuel filter.
  • the brass ring surrounds an annular solid plastic section of the main body of the fuel filter, from which extend, for example, three webs in the longitudinal direction to a common bottom portion, of which the actual screen mesh is encapsulated in these sub-areas.
  • An adjusting sleeve downstream of the fuel filter is used to adjust the spring bias of a voltage applied to the adjusting return spring.
  • the fuel injection valve according to the features of the main claim has the advantage that an adjustment is used as a combined component in the fuel supply, that combines a high functional integration (adjustment of the spring force of the return spring, filtering the fuel, damping of pressure pulsations) in itself, the adjustment with a Pressing area is pressed in a metallic valve member and a further sealing area is provided on the adjustment, with which the adjusting is additionally sealed against a valve member, thus ensuring that the entire fuel flow is passed through the throttle bore within the adjustment and no bypass outside of the adjustment arises, which would diminish the damping function of the throttle bore.
  • a high functional integration adjusted of the spring force of the return spring, filtering the fuel, damping of pressure pulsations
  • the sealing region in the inlet-side region of the adjusting element, while the pressing region is formed at the opposite end in the downstream region of the adjusting element.
  • the sealing area on the circumference of the adjusting element may ideally be formed by a plurality of sealing fins, which circumferentially completely and thereby rotate around each other separately or thread-like or spaced apart.
  • the throttle bore is formed in the axial extension region of the sealing region of the adjusting element.
  • FIG. 1 an axial section through a fuel injection valve according to the prior art
  • FIG. 2 an enlarged section of the in FIG. 1 shown fuel injection valve in the area II in FIG. 1 with an embodiment of the adjusting element according to the invention
  • FIG. 3 the adjusting element in a perspective view
  • FIG. 4 the adjusting element in a sectional view
  • FIG. 5 an alternative adjustment in a sectional view
  • FIG. 6 a corresponding alternative installation situation at the inlet end of a fuel injection valve.
  • fuel injection valve 1 is designed in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression, spark-ignition internal combustion engines.
  • the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4 which cooperates with a valve seat body 6 arranged on a valve seat body 5 to form a sealing seat.
  • the fuel injection valve 1 in the exemplary embodiment is an inwardly opening fuel injection valve 1, which has at least one injection opening 7.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a magnetic coil 10.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the inner pole 13 and the outer pole 9 are separated by a constriction 26 and connected to each other by a non-ferromagnetic connecting member 29.
  • the magnetic coil 10 is energized via a line 19 from a via an electrical plug contact 17 can be supplied with electric current.
  • the plug contact 17 is surrounded by a plastic casing 18, which may be molded on
  • valve needle 3 is guided in a valve needle guide 14, which is designed disk-shaped. Upstream of the dial 15 is an armature 20. This is a non-positively connected via a first flange 21 with the valve needle 3 in connection, which is connected by a weld 22 with the first flange 21. On the first flange 21 is supported Return spring 23 from which is brought in the present design of the fuel injection valve 1 by an adjusting sleeve 24 to bias.
  • Fuel channels 30, 31 and 32 extend in the upper valve needle guide 14, in the armature 20 and on a lower guide element 36.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel injection valve 1 is sealed by a seal 28 against a fuel distributor line, not shown, and by a further seal 37 against a cylinder head, not shown.
  • a Vorhubfeder 38 is arranged, which holds the armature 20 in the resting state of the fuel injection valve 1 in abutment against the second flange 34.
  • the spring constant of the Vorhubfeder 38 is substantially smaller than the spring constant of the return spring 23rd
  • the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 and the Vorhubfeder 38 against its stroke direction so that the valve closing body 4 is held on the valve seat surface 6 in sealing engagement. Upon excitation of the magnetic coil 10, this builds up a magnetic field, which initially moves the armature 20 counter to the spring force of the prestroke spring 38 in the stroke direction, wherein an anchor free travel is predetermined by the distance between the first flange 21 and the armature 20. After passing through the armature free passage, the armature 20 takes the first flange 21, which is welded to the valve needle 3, against the spring force of the return spring 23 also in the stroke direction with.
  • the armature 20 passes through a total stroke, which corresponds to the height of the working gap 27 between the armature 20 and the inner pole 13.
  • the valve closing body 4 communicating with the valve needle 3 lifts off from the valve seat surface 6, and the fuel guided via the fuel channels 30 to 32 is sprayed through the injection opening 7.
  • the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 from the inner pole 13, whereby the valve connected to the needle 3 in communication first flange 21 moves against the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, whereby the valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • the Vorhubfeder 38 then acts on the armature 20 again so that it does not rebound from the second flange 34, but returns to the rest state without Anschlagspreller.
  • the inner pole 13 is made sleeve-shaped towards the inlet end of the fuel injection valve 1 and thus forms a connecting sleeve 40 in this area.
  • the connecting sleeve 40 can also be formed as a separate component independently of the inner pole 13, into which then e.g. the inner pole 13 is fitted.
  • the filter element 25 is introduced, which serves to filter out such particles in the fuel, which could otherwise lead to functional impairments of the relevant valve components such as the sealing seat.
  • the electromagnetic circuit may e.g. be replaced by a piezoelectric actuator or a magnetostrictive actuator as an actuator.
  • FIG. 2 shows in a partial axial sectional view of the in FIG. 1 With II designated section as an inventive embodiment of an adjustment 50, which is designed as a combined component and at least the functions of the adjusting sleeve 24 and the filter element 25 combines.
  • the adjusting element 50 according to the invention is constructed of a plastic in the main body, preferably of an organic polymeric high-temperature resistant thermoplastic, such as polyether ether ketones (PEEK) or polyphenylene sulfide (PPS) or polyamides (PA) or polyphthalamides (PPA).
  • PEEK polyether ether ketones
  • PPS polyphenylene sulfide
  • PA polyamides
  • PPA polyphthalamides
  • a clamping sleeve 51 is used as the insert part, which consists of stainless steel, for example, surrounding it like a jacket at the downstream end of the adjusting element 50 and additionally engaging the adjusting element 50 in a bottom area, so that in this area the return spring 23 can attack.
  • FIG. 3 shows the adjusting element 50 according to the invention in a perspective view
  • FIG. 4 the adjusting element 50 in a sectional view shows.
  • a filter fabric 52 is introduced as a filter element, which can also be inserted in the plastic injection molding process as an insert in the tool.
  • This tubular filter fabric 52 may be made of PEEK, or preferably of a metallic fabric material, which provides additional support and increased robustness of the adjustment member 50 in the region of the filter.
  • the filter fabric 52 is received in a screen basket 53 of the base body, which forms the axially central region of the adjusting element 50 and is held by a plurality of, at least two web-like supporting parts of the base body.
  • the aforementioned components of the adjusting element 50 are injected, for example in an injection molding tool to form a component, wherein during the injection molding process also a throttle bore 54 in the inlet-side region of the adjusting element 50 can be formed with.
  • the throttle bore 54 is provided which has an opening cross-section which is many times smaller than the opening cross-section of the connecting sleeve 40 and the inner pole 13.
  • the throttle bore 54 in this case has e.g. a diameter of 0.4 mm to 1.5 mm depending on the opening width of the connecting sleeve 40.
  • the adjusting element 50 is surrounded on the outside by a plurality of sealing fins 56 in a sealing region 57, which completely surround the circumference.
  • the in plastic base body with molded sealing blades 56 can thereby run around thread-like or even spaced apart.
  • the adjusting element 50 is guided into the inner pole 13, in which case the return spring 23 is finally adjusted to a desired pre-press dimension via the pressing region 55.
  • the connecting sleeve 40 is inserted over the protruding upper end of the adjusting element 50, whereby a slight interference fit in the inflow-side region deforms the sealing blades 56 or slightly bends. This seal over the sealing fins 56 is necessary to prevent a bypass to the throttle bore 54.
  • FIG. 5 an alternative adjustment member 50 is shown in a sectional view while FIG. 6 shows a corresponding alternative installation situation at the inlet end of a fuel injection valve.
  • the main difference to that in the FIGS. 2 to 4 shown embodiment consists in the rotated by 180 ° mounting position.
  • the throttle bore 54 is in turn mitausgeformt in the axial extension region of the sealing portion 57 of the adjusting element 50.
  • the Sealing region 57 with the inner throttle bore 54 now at the downstream end of the adjustment member 50, on which the return spring 23 can be supported accordingly, while the pressing portion 55 of the adjustment member 50 forms the inflow-side end of the adjustment member 50.
  • FIG. 6 it can be seen, the adjusting element 50 can be introduced far forward in the connection sleeve 40 on the inlet side.
  • the invention is not limited to the illustrated embodiments and also in a variety of other designs of fuel injection valves compared to those in FIG. 1 shown design of the fuel injection valve feasible.

Abstract

Ein Brennstoffeinspritzventil (1) für Brennstoffeinspritzanlagen von Brennkraftmaschinen, insbesondere zum direkten Einspritzen von Brennstoff in den Brennraum einer Brennkraftmaschine, umfasst eine Magnetspule (10), einen durch die Magnetspule (10) in einer Schließrichtung von einer Rückstellfeder (23) beaufschlagten Anker (20) und eine mit dem Anker (20) kraftschlüssig in Verbindung stehende Ventilnadel (3) zur Betätigung eines Ventilschließkörpers (4), der zusammen mit einer Ventilsitzfläche (6) einen Dichtsitz bildet. In einer der zulaufseitigen Brennstoffzufuhr (16) dienenden Anschlusshülse (40) ist ein Einstellelement (50) zur Einstellung der Federkraft der Rückstellfeder (23) angeordnet. Neben einem Pressbereich (55), mit dem das Einstellelement (50) in einem metallischen Ventilbauteil (13) verpresst ist, ist ein weiterer Dichtbereich (57) am Einstellelement (50) vorgesehen, mit dem das Einstellelement (50) gegenüber einem weiteren Ventilbauteil (40) abgedichtet ist.A fuel injection valve (1) for fuel injection systems of internal combustion engines, in particular for direct injection of fuel into the combustion chamber of an internal combustion engine, comprises a magnetic coil (10), an armature (20) acted upon by the magnetic coil (10) in a closing direction by a return spring (23). and a valve needle (3), which is non-positively connected with the armature (20), for actuating a valve-closing body (4) which forms a sealing seat together with a valve seat surface (6). In one of the inlet side fuel supply (16) serving connection sleeve (40), an adjusting element (50) for adjusting the spring force of the return spring (23) is arranged. In addition to a pressing region (55) with which the adjusting element (50) is pressed in a metallic valve component (13), a further sealing region (57) is provided on the adjusting element (50), with which the adjusting element (50) faces a further valve component (50). 40) is sealed.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Hauptanspruchs.The invention relates to a fuel injection valve according to the preamble of the main claim.

Aus der DE 40 03 228 A1 ist ein Brennstoffeinspritzventil bekannt, bei dem ein Brennstofffilter am zulaufseitigen Ende des Brennstoffeinspritzventils in den Brennstoffeinlassstutzen eingepresst ist. Dieser Brennstofffilter ist am Umfang beispielsweise mit einem Messingring versehen, der mit der Wandung des Brennstoffeinlassstutzens die Paarung beim Einpressen des Brennstofffilters bildet. Der Messingring umgibt einen ringförmigen Kunststoffmassivabschnitt des Grundkörpers des Brennstofffilters, von dem aus z.B. drei Stege in Längsrichtung bis zu einem gemeinsamen Bodenabschnitt verlaufen, von denen das eigentliche Siebgewebe in diesen Teilbereichen umspritzt ist. Eine Einstellhülse stromabwärts des Brennstofffilters dient zur Einstellung der Federvorspannung einer an der Einstellhülse anliegenden Rückstellfeder.From the DE 40 03 228 A1 For example, a fuel injector is known in which a fuel filter is press-fitted into the fuel inlet port at the upstream end of the fuel injector. This fuel filter is provided at the periphery, for example, with a brass ring which forms the mating with the wall of the Brennstoffeinlassstutzens when pressing the fuel filter. The brass ring surrounds an annular solid plastic section of the main body of the fuel filter, from which extend, for example, three webs in the longitudinal direction to a common bottom portion, of which the actual screen mesh is encapsulated in these sub-areas. An adjusting sleeve downstream of the fuel filter is used to adjust the spring bias of a voltage applied to the adjusting return spring.

Bekannt sind desweiteren bereits Brennstoffeinspritzventile, bei denen die Einstellhülse und der Brennstofffilter als ein so genanntes Kombibauteil vorliegen, also die beiden Funktionen der Einstellung der Federvorspannung einer an der Einstellhülse anliegenden Rückstellfeder und die Filterung des einströmenden Brennstoffs in einem Bauteil integriert sind ( US 5,335,863 A , US 6,434,822 B1 , EP 1 296 057 B1 , EP 2 426 351 A1 , EP 1 377 747 A1 ). Alle bekannten Lösungen zeichnen sich dadurch aus, dass ein Pressbereich im Bereich der Einstellhülse vorgesehen ist, der mit der Wandung des sie umgebenden Anschlussstutzens eine Presspassung eingeht, die so eng gewählt ist, dass über die Lebensdauer des Brennstoffeinspritzventils die Federspannung konstant gehalten bleibt, also ein Verrutschen der Einstellhülse ausgeschlossen ist.Furthermore fuel injectors are already known in which the adjusting sleeve and the fuel filter are present as a so-called combination component, ie the two functions of adjusting the spring preload of a restoring spring resting against the adjusting sleeve and the filtering of the incoming fuel are integrated in one component ( US 5,335,863 A . US Pat. No. 6,434,822 B1 . EP 1 296 057 B1 . EP 2 426 351 A1 . EP 1 377 747 A1 ). All known solutions are characterized by the fact that a pressing area is provided in the adjustment sleeve, which enters into a press fit with the wall of the surrounding connecting piece, which is chosen so tight that over the life of the fuel injection valve, the spring tension remains constant, so a Slipping of the adjusting sleeve is excluded.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Brennstoffeinspritzventil mit den Merkmalen des Hauptanspruchs hat den Vorteil, dass ein Einstellelement als Kombibauteil im Brennstoffzulauf eingesetzt ist, dass eine hohe Funktionsintegration (Einstellung der Federkraft der Rückstellfeder, Filterung des Brennstoffs, Dämpfung von Druckpulsationen) in sich vereint, wobei das Einstellelement mit einem Pressbereich in einem metallischen Ventilbauteil verpresst ist und ein weiterer Dichtbereich am Einstellelement vorgesehen ist, mit dem das Einstellelement noch zusätzlich gegenüber einem Ventilbauteil abgedichtet ist, womit sichergestellt ist, dass der gesamte Brennstoffzufluss über die Drosselbohrung innerhalb des Einstellelements geführt wird und kein Bypass außerhalb des Einstellelements entsteht, der die Dämpfungsfunktion der Drosselbohrung schmälern würde. Mit sehr geringen Zusatzkosten und zudem einfach herstellbar ist insofern eine erhebliche Geräuschreduzierung gegenüber Brennstoffeinspritzventilen ähnlicher Bauart und vergleichbarer konstruktiver Ausgestaltung erzielbar.The fuel injection valve according to the features of the main claim has the advantage that an adjustment is used as a combined component in the fuel supply, that combines a high functional integration (adjustment of the spring force of the return spring, filtering the fuel, damping of pressure pulsations) in itself, the adjustment with a Pressing area is pressed in a metallic valve member and a further sealing area is provided on the adjustment, with which the adjusting is additionally sealed against a valve member, thus ensuring that the entire fuel flow is passed through the throttle bore within the adjustment and no bypass outside of the adjustment arises, which would diminish the damping function of the throttle bore. With very low additional costs and also easy to produce so far a significant noise reduction compared to fuel injectors of similar design and comparable structural design achievable.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Brennstoffeinspritzventils möglich.The measures listed in the dependent claims advantageous refinements and improvements of the main claim fuel injector are possible.

Vorteilhaft ist es, den Dichtbereich im zulaufseitigen Bereich des Einstellelements vorzusehen, während der Pressbereich am gegenüberliegenden Ende im abströmseitigen Bereich des Einstellelements ausgebildet ist. Dabei kann der Dichtbereich am Umfang des Einstellelements idealerweise von mehreren Dichtlamellen gebildet sein, die umfangsseitig vollständig und dabei gewindeartig oder beabstandet zueinander separat umlaufen.It is advantageous to provide the sealing region in the inlet-side region of the adjusting element, while the pressing region is formed at the opposite end in the downstream region of the adjusting element. In this case, the sealing area on the circumference of the adjusting element may ideally be formed by a plurality of sealing fins, which circumferentially completely and thereby rotate around each other separately or thread-like or spaced apart.

In vorteilhafter Weise ist die Drosselbohrung im axialen Erstreckungsbereich des Dichtbereichs des Einstellelements ausgeformt.Advantageously, the throttle bore is formed in the axial extension region of the sealing region of the adjusting element.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 einen axialen Schnitt durch ein Brennstoffeinspritzventil gemäß dem Stand der Technik, Figur 2 einen vergrößerten Ausschnitt aus dem in Figur 1 dargestellten Brennstoffeinspritzventil im Bereich II in Figur 1 mit einer erfindungsgemäßen Ausgestaltung des Einstellelements, Figur 3 das Einstellelement in einer perspektivischen Ansicht, Figur 4 das Einstellelement in einer Schnittdarstellung, Figur 5 ein alternatives Einstellelement in einer Schnittdarstellung und Figur 6 eine entsprechende alternative Einbausituation am zulaufseitigen Ende eines Brennstoffeinspritzventils.Embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description. Show it FIG. 1 an axial section through a fuel injection valve according to the prior art, FIG. 2 an enlarged section of the in FIG. 1 shown fuel injection valve in the area II in FIG. 1 with an embodiment of the adjusting element according to the invention, FIG. 3 the adjusting element in a perspective view, FIG. 4 the adjusting element in a sectional view, FIG. 5 an alternative adjustment in a sectional view and FIG. 6 a corresponding alternative installation situation at the inlet end of a fuel injection valve.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Bevor anhand der Figuren 2 bis 6 Ausführungsbeispiele eines erfindungsgemäßen Brennstoffeinspritzventils näher beschrieben werden, soll zum besseren Verständnis der Erfindung zunächst anhand von Figur 1 ein bereits bekanntes Brennstoffeinspritzventil bezüglich seiner wesentlichen Bauteile kurz erläutert werden.Before using the FIGS. 2 to 6 Embodiments of a fuel injection valve according to the invention will be described in more detail, is to better understand the invention first with reference to FIG. 1 an already known fuel injection valve will be briefly explained with respect to its essential components.

Das in Figur 1 dargestellte Brennstoffeinspritzventil 1 ist in der Form eines Brennstoffeinspritzventils 1 für Brennstoffeinspritzanlagen von gemischverdichtenden, fremdgezündeten Brennkraftmaschinen ausgeführt. Das Brennstoffeinspritzventil 1 eignet sich insbesondere zum direkten Einspritzen von Brennstoff in einen nicht dargestellten Brennraum einer Brennkraftmaschine.This in FIG. 1 shown fuel injection valve 1 is designed in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression, spark-ignition internal combustion engines. The fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.

Das Brennstoffeinspritzventil 1 besteht aus einem Düsenkörper 2, in welchem eine Ventilnadel 3 angeordnet ist. Die Ventilnadel 3 steht mit einem Ventilschließkörper 4 in Wirkverbindung, der mit einer auf einem Ventilsitzkörper 5 angeordneten Ventilsitzfläche 6 zu einem Dichtsitz zusammenwirkt. Bei dem Brennstoffeinspritzventil 1 handelt es sich im Ausführungsbeispiel um ein nach innen öffnendes Brennstoffeinspritzventil 1, welches über wenigstens eine Abspritzöffnung 7 verfügt. Der Düsenkörper 2 ist durch eine Dichtung 8 gegen einen Außenpol 9 einer Magnetspule 10 abgedichtet. Die Magnetspule 10 ist in einem Spulengehäuse 11 gekapselt und auf einen Spulenträger 12 gewickelt, welcher an einem Innenpol 13 der Magnetspule 10 anliegt. Der Innenpol 13 und der Außenpol 9 sind durch eine Verengung 26 voneinander getrennt und miteinander durch ein nicht ferromagnetisches Verbindungsbauteil 29 verbunden. Die Magnetspule 10 wird über eine Leitung 19 von einem über einen elektrischen Steckkontakt 17 zuführbaren elektrischen Strom erregt. Der Steckkontakt 17 ist von einer Kunststoffummantelung 18 umgeben, die am Innenpol 13 angespritzt sein kann.The fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged. The valve needle 3 is operatively connected to a valve closing body 4 which cooperates with a valve seat body 6 arranged on a valve seat body 5 to form a sealing seat. The fuel injection valve 1 in the exemplary embodiment is an inwardly opening fuel injection valve 1, which has at least one injection opening 7. The nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a magnetic coil 10. The magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10. The inner pole 13 and the outer pole 9 are separated by a constriction 26 and connected to each other by a non-ferromagnetic connecting member 29. The magnetic coil 10 is energized via a line 19 from a via an electrical plug contact 17 can be supplied with electric current. The plug contact 17 is surrounded by a plastic casing 18, which may be molded on the inner pole 13.

Die Ventilnadel 3 ist in einer Ventilnadelführung 14 geführt, welche scheibenförmig ausgeführt ist. Zur Hubeinstellung dient eine zugepaarte Einstellscheibe 15. Stromaufwärts der Einstellscheibe 15 befindet sich ein Anker 20. Dieser steht über einen ersten Flansch 21 kraftschlüssig mit der Ventilnadel 3 in Verbindung, welche durch eine Schweißnaht 22 mit dem ersten Flansch 21 verbunden ist. Auf dem ersten Flansch 21 stützt sich eine Rückstellfeder 23 ab, welche in der vorliegenden Bauform des Brennstoffeinspritzventils 1 durch eine Einstellhülse 24 auf Vorspannung gebracht wird.The valve needle 3 is guided in a valve needle guide 14, which is designed disk-shaped. Upstream of the dial 15 is an armature 20. This is a non-positively connected via a first flange 21 with the valve needle 3 in connection, which is connected by a weld 22 with the first flange 21. On the first flange 21 is supported Return spring 23 from which is brought in the present design of the fuel injection valve 1 by an adjusting sleeve 24 to bias.

In der oberen Ventilnadelführung 14, im Anker 20 und an einem unteren Führungselement 36 verlaufen Brennstoffkanäle 30, 31 und 32. Der Brennstoff wird über eine zentrale Brennstoffzufuhr 16 zugeführt und durch ein Filterelement 25 gefiltert. Das Brennstoffeinspritzventil 1 ist durch eine Dichtung 28 gegen eine nicht weiter dargestellte Brennstoffverteilerleitung und durch eine weitere Dichtung 37 gegen einen nicht weiter dargestellten Zylinderkopf abgedichtet. Zwischen dem ersten Flansch 21 und dem Anker 20 ist eine Vorhubfeder 38 angeordnet, welche den Anker 20 im Ruhezustand des Brennstoffeinspritzventils 1 in Anlage an dem zweiten Flansch 34 hält. Die Federkonstante der Vorhubfeder 38 ist dabei wesentlich kleiner als die Federkonstante der Rückstellfeder 23.Fuel channels 30, 31 and 32 extend in the upper valve needle guide 14, in the armature 20 and on a lower guide element 36. The fuel is supplied via a central fuel supply 16 and filtered by a filter element 25. The fuel injection valve 1 is sealed by a seal 28 against a fuel distributor line, not shown, and by a further seal 37 against a cylinder head, not shown. Between the first flange 21 and the armature 20 a Vorhubfeder 38 is arranged, which holds the armature 20 in the resting state of the fuel injection valve 1 in abutment against the second flange 34. The spring constant of the Vorhubfeder 38 is substantially smaller than the spring constant of the return spring 23rd

Im Ruhezustand des Brennstoffeinspritzventils 1 wird der Anker 20 von der Rückstellfeder 23 und der Vorhubfeder 38 entgegen seiner Hubrichtung so beaufschlagt, dass der Ventilschließkörper 4 an der Ventilsitzfläche 6 in dichtender Anlage gehalten wird. Bei Erregung der Magnetspule 10 baut diese ein Magnetfeld auf, welches den Anker 20 zunächst entgegen der Federkraft der Vorhubfeder 38 in Hubrichtung bewegt, wobei ein Ankerfreiweg durch den Abstand zwischen dem ersten Flansch 21 und dem Anker 20 vorgegeben ist. Nach Durchlaufen des Ankerfreiwegs nimmt der Anker 20 den ersten Flansch 21, welcher mit der Ventilnadel 3 verschweißt ist, entgegen der Federkraft der Rückstellfeder 23 ebenfalls in Hubrichtung mit. Der Anker 20 durchläuft dabei einen Gesamthub, der der Höhe des Arbeitsspaltes 27 zwischen dem Anker 20 und dem Innenpol 13 entspricht. Der mit der Ventilnadel 3 in Verbindung stehende Ventilschließkörper 4 hebt von der Ventilsitzfläche 6 ab, und der über die Brennstoffkanäle 30 bis 32 geführte Brennstoff wird durch die Abspritzöffnung 7 abgespritzt.In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 and the Vorhubfeder 38 against its stroke direction so that the valve closing body 4 is held on the valve seat surface 6 in sealing engagement. Upon excitation of the magnetic coil 10, this builds up a magnetic field, which initially moves the armature 20 counter to the spring force of the prestroke spring 38 in the stroke direction, wherein an anchor free travel is predetermined by the distance between the first flange 21 and the armature 20. After passing through the armature free passage, the armature 20 takes the first flange 21, which is welded to the valve needle 3, against the spring force of the return spring 23 also in the stroke direction with. The armature 20 passes through a total stroke, which corresponds to the height of the working gap 27 between the armature 20 and the inner pole 13. The valve closing body 4 communicating with the valve needle 3 lifts off from the valve seat surface 6, and the fuel guided via the fuel channels 30 to 32 is sprayed through the injection opening 7.

Wird der Spulenstrom abgeschaltet, fällt der Anker 20 nach genügendem Abbau des Magnetfeldes durch den Druck der Rückstellfeder 23 vom Innenpol 13 ab, wodurch sich der mit der Ventilnadel 3 in Verbindung stehende erste Flansch 21 entgegen der Hubrichtung bewegt. Die Ventilnadel 3 wird dadurch in die gleiche Richtung bewegt, wodurch der Ventilschließkörper 4 auf der Ventilsitzfläche 6 aufsetzt und das Brennstoffeinspritzventil 1 geschlossen wird. Die Vorhubfeder 38 beaufschlagt den Anker 20 dann wiederum so, dass dieser nicht von dem zweiten Flansch 34 zurückprellt, sondern ohne Anschlagspreller in den Ruhezustand zurückkehrt.If the coil current is turned off, the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 from the inner pole 13, whereby the valve connected to the needle 3 in communication first flange 21 moves against the stroke direction. The valve needle 3 is thereby moved in the same direction, whereby the valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve 1 is closed. The Vorhubfeder 38 then acts on the armature 20 again so that it does not rebound from the second flange 34, but returns to the rest state without Anschlagspreller.

Der Innenpol 13 ist zum Zulaufende des Brennstoffeinspritzventils 1 hin hülsenförmig ausgeführt und bildet insofern in diesem Bereich eine Anschlusshülse 40. Die Anschlusshülse 40 kann auch als separates Bauteil unabhängig vom Innenpol 13 ausgeformt sein, in die dann z.B. der Innenpol 13 eingepasst ist. Im Bereich der Anschlusshülse 40 ist das Filterelement 25 eingebracht, das der Herausfiltrierung solcher Partikel im Brennstoff dient, die ansonsten zu Funktionsbeeinträchtigungen an den relevanten Ventilbauteilen wie dem Dichtsitz führen könnten.The inner pole 13 is made sleeve-shaped towards the inlet end of the fuel injection valve 1 and thus forms a connecting sleeve 40 in this area. The connecting sleeve 40 can also be formed as a separate component independently of the inner pole 13, into which then e.g. the inner pole 13 is fitted. In the region of the connecting sleeve 40, the filter element 25 is introduced, which serves to filter out such particles in the fuel, which could otherwise lead to functional impairments of the relevant valve components such as the sealing seat.

Der elektromagnetische Kreis kann z.B. auch durch einen Piezoaktor oder einen magnetostriktiven Aktor als Aktuator ersetzt werden.The electromagnetic circuit may e.g. be replaced by a piezoelectric actuator or a magnetostrictive actuator as an actuator.

Figur 2 zeigt in einer auszugsweisen axialen Schnittdarstellung den in Figur 1 mit II bezeichneten Ausschnitt als ein erfindungsgemäßes Ausführungsbeispiel eines Einstellelements 50, das als Kombibauteil ausgeführt ist und zumindest die Funktionen der Einstellhülse 24 und des Filterelements 25 vereint. Im Gegensatz zu bekannten metallenen Einstellhülsen ist das erfindungsgemäße Einstellelement 50 aus einem Kunststoff im Grundkörper aufgebaut, vorzugsweise aus einem organischen polymeren hochtemperaturfesten Thermoplast, wie z.B. Polyether Ether Ketone (PEEK) oder Polyphenylensulfid (PPS) oder Polyamide (PA) bzw. Polyphtalamide (PPA). In idealer Weise wird das Einstellelement 50 mittels Kunststoffspritzgießen hergestellt. Um den Pressbereich 55 des Einstellelements 50 sicherzustellen wird als Einlegeteil eine Klemmhülse 51 verwandt, die z.B. aus Edelstahl besteht und die am stromabwärtigen Ende des Einstellelements 50 dieses mantelartig umgibt und zusätzlich auch das Einstellelement 50 in einem Bodenbereich untergreift, so dass in diesem Bereich die Rückstellfeder 23 angreifen kann. FIG. 2 shows in a partial axial sectional view of the in FIG. 1 With II designated section as an inventive embodiment of an adjustment 50, which is designed as a combined component and at least the functions of the adjusting sleeve 24 and the filter element 25 combines. In contrast to known metal adjusting sleeves, the adjusting element 50 according to the invention is constructed of a plastic in the main body, preferably of an organic polymeric high-temperature resistant thermoplastic, such as polyether ether ketones (PEEK) or polyphenylene sulfide (PPS) or polyamides (PA) or polyphthalamides (PPA). , Ideally, the adjusting element 50 is produced by means of plastic injection molding. In order to ensure the pressing area 55 of the adjusting element 50, a clamping sleeve 51 is used as the insert part, which consists of stainless steel, for example, surrounding it like a jacket at the downstream end of the adjusting element 50 and additionally engaging the adjusting element 50 in a bottom area, so that in this area the return spring 23 can attack.

Figur 3 zeigt das erfindungsgemäße Einstellelement 50 in einer perspektivischen Ansicht, während Figur 4 das Einstellelement 50 in einer Schnittdarstellung zeigt. FIG. 3 shows the adjusting element 50 according to the invention in a perspective view, while FIG. 4 the adjusting element 50 in a sectional view shows.

Im Inneren des Kunststoff-Grundkörpers des Einstellelements 50 ist ein Filtergewebe 52 als Filterelement eingebracht, das im Kunststoffspritzgussprozess ebenfalls als Einlegeteil in das Werkzeug mit eingelegt werden kann. Dieses schlauchartige Filtergewebe 52 kann aus PEEK bestehen oder bevorzugt aus einem metallischen Gewebewerkstoff, was für eine zusätzliche Stützwirkung und eine erhöhte Robustheit des Einstellelements 50 im Bereich des Filters sorgt. Das Filtergewebe 52 ist in einem Siebkorb 53 des Grundkörpers aufgenommen, der den axial mittleren Bereich des Einstellelements 50 bildet und von mehreren, wenigstens zwei stegartigen Stützteilen des Grundkörpers gehalten wird. Die vorgenannten Bauelemente des Einstellelements 50 werden z.B. in einem Spritzgusswerkzeug zu einem Bauteil gespritzt, wobei während des Spritzgussprozesses zudem noch eine Drosselbohrung 54 im zulaufseitigen Bereich des Einstellelements 50 mit ausgeformt werden kann.In the interior of the plastic base body of the adjusting element 50, a filter fabric 52 is introduced as a filter element, which can also be inserted in the plastic injection molding process as an insert in the tool. This tubular filter fabric 52 may be made of PEEK, or preferably of a metallic fabric material, which provides additional support and increased robustness of the adjustment member 50 in the region of the filter. The filter fabric 52 is received in a screen basket 53 of the base body, which forms the axially central region of the adjusting element 50 and is held by a plurality of, at least two web-like supporting parts of the base body. The The aforementioned components of the adjusting element 50 are injected, for example in an injection molding tool to form a component, wherein during the injection molding process also a throttle bore 54 in the inlet-side region of the adjusting element 50 can be formed with.

Insbesondere bei Hochdruckeinspritzventilen, die z.B. mit einem Brennstoffdruck von > 100 bar versorgt werden, hat sich gezeigt, dass es im Betrieb zu einer erheblichen Geräuschentwicklung kommt, die als z.T. störend empfunden werden kann. Eine wirksame Geräuschreduzierung erfolgt dadurch, dass im Zulaufbereich des Einstellelements 50 die Drosselbohrung 54 vorgesehen ist, die einen Öffnungsquerschnitt besitzt, der um ein Vielfaches kleiner ist als der Öffnungsquerschnitt der Anschlusshülse 40 bzw. des Innenpols 13. Die Drosselbohrung 54 besitzt dabei z.B. einen Durchmesser von 0,4 mm bis 1,5 mm je nach Öffnungsweite der Anschlusshülse 40. Mit Hilfe der Drosselbohrung 54 kann eine gezielte Dämpfung von Druckpulsationen im Inneren des Brennstoffeinspritzventils erfolgen.Especially with high pressure injectors, e.g. are supplied with a fuel pressure of> 100 bar, it has been shown that it comes in operation to a considerable noise, which z.T. can be distracting. An effective noise reduction takes place in that in the inlet region of the adjusting member 50, the throttle bore 54 is provided which has an opening cross-section which is many times smaller than the opening cross-section of the connecting sleeve 40 and the inner pole 13. The throttle bore 54 in this case has e.g. a diameter of 0.4 mm to 1.5 mm depending on the opening width of the connecting sleeve 40. With the aid of the throttle bore 54, a targeted damping of pressure pulsations in the interior of the fuel injection valve can take place.

In diesem oberen zulaufseitigen Bereich ist das Einstellelement 50 außen von mehreren Dichtlamellen 56 in einem Dichtbereich 57 umgeben, die umfangsseitig vollständig umlaufen. Die im Kunststoff-Grundkörper mit ausgeformten Dichtlamellen 56 können dabei gewindeartig oder auch beabstandet zueinander separat umlaufen.In this upper inflow-side region, the adjusting element 50 is surrounded on the outside by a plurality of sealing fins 56 in a sealing region 57, which completely surround the circumference. The in plastic base body with molded sealing blades 56 can thereby run around thread-like or even spaced apart.

Während des Montageprozesses wird das Einstellelement 50 in den Innenpol 13 geführt, wobei dann letztlich über den Pressbereich 55 die Rückstellfeder 23 auf ein gewünschtes Voreinpressmaß eingestellt wird. Bei der Montage der Anschlusshülse 40 wird die Anschlusshülse 40 über das hinausstehende obere Ende des Einstellelements 50 gesteckt, wodurch eine leichte Presspassung im zulaufseitigen Bereich die Dichtlamellen 56 verformt bzw. geringfügig umbiegt. Diese Abdichtung über die Dichtlamellen 56 ist notwendig, um einen Bypass zu der Drosselbohrung 54 zu verhindern. Nach der Montage und der Verschweißung der Anschlusshülse 40 am Innenpol 13 können schlussendlich durch Verschieben des Einstellelements 50 die dynamische Abspritzmenge und die Federkraft der Rückstellfeder 23 endgültig fest eingestellt werden.During the assembly process, the adjusting element 50 is guided into the inner pole 13, in which case the return spring 23 is finally adjusted to a desired pre-press dimension via the pressing region 55. When mounting the connecting sleeve 40, the connecting sleeve 40 is inserted over the protruding upper end of the adjusting element 50, whereby a slight interference fit in the inflow-side region deforms the sealing blades 56 or slightly bends. This seal over the sealing fins 56 is necessary to prevent a bypass to the throttle bore 54. After assembly and the welding of the connecting sleeve 40 at the inner pole 13 can finally be adjusted by moving the adjusting member 50, the dynamic Abspritzmenge and the spring force of the return spring 23 final.

In der Figur 5 ist ein alternatives Einstellelement 50 in einer Schnittdarstellung gezeigt, während Figur 6 eine entsprechende alternative Einbausituation am zulaufseitigen Ende eines Brennstoffeinspritzventils zeigt. Der wesentliche Unterschied zu dem in den Figuren 2 bis 4 gezeigten Ausführungsbeispiel besteht in der um 180° gedrehten Einbauposition. In vorteilhafter Weise ist die Drosselbohrung 54 wiederum im axialen Erstreckungsbereich des Dichtbereichs 57 des Einstellelements 50 mitausgeformt. Allerdings befindet sich der Dichtbereich 57 mit der inneren Drosselbohrung 54 nun am abströmseitigen Ende des Einstellelements 50, an dem sich entsprechend die Rückstellfeder 23 abstützen kann, während der Pressbereich 55 des Einstellelements 50 das zulaufseitige Ende des Einstellelements 50 bildet. Wie der Figur 6 zu entnehmen ist, kann das Einstellelement 50 zulaufseitig weit vorn in der Anschlusshülse 40 eingebracht sein.In the FIG. 5 an alternative adjustment member 50 is shown in a sectional view while FIG. 6 shows a corresponding alternative installation situation at the inlet end of a fuel injection valve. The main difference to that in the FIGS. 2 to 4 shown embodiment consists in the rotated by 180 ° mounting position. Advantageously, the throttle bore 54 is in turn mitausgeformt in the axial extension region of the sealing portion 57 of the adjusting element 50. However, there is the Sealing region 57 with the inner throttle bore 54 now at the downstream end of the adjustment member 50, on which the return spring 23 can be supported accordingly, while the pressing portion 55 of the adjustment member 50 forms the inflow-side end of the adjustment member 50. Again FIG. 6 it can be seen, the adjusting element 50 can be introduced far forward in the connection sleeve 40 on the inlet side.

Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt und auch bei einer Vielzahl anderer Bauweisen von Brennstoffeinspritzventilen im Vergleich zu der in Figur 1 gezeigten Bauform des Brennstoffeinspritzventils realisierbar.The invention is not limited to the illustrated embodiments and also in a variety of other designs of fuel injection valves compared to those in FIG. 1 shown design of the fuel injection valve feasible.

Claims (10)

Brennstoffeinspritzventil (1) für Brennstoffeinspritzanlagen von Brennkraftmaschinen, insbesondere zum direkten Einspritzen von Brennstoff in den Brennraum einer Brennkraftmaschine, mit einem Aktuator (9, 10, 13, 20), durch dessen Erregung eine Hubbewegung einer Ventilnadel (3) erzielbar ist, wodurch eine Betätigung eines Ventilschließkörpers (4), der zusammen mit einer Ventilsitzfläche (6) einen Dichtsitz bildet, ermöglicht ist, und mit einer zulaufseitigen Brennstoffzufuhr (16), wobei in dem Brennstoffzulauf ein Einstellelement (50) zur Einstellung der Federkraft einer Rückstellfeder (23) angeordnet ist,
dadurch gekennzeichnet,
dass neben einem Pressbereich (55), mit dem das Einstellelement (50) in einem metallischen Ventilbauteil (13) verpresst ist, ein weiterer Dichtbereich (57) am Einstellelement (50) vorgesehen ist, mit dem das Einstellelement (50) gegenüber demselben oder einem anderen Ventilbauteil (13, 40) abgedichtet ist.Fuel injection valve (1) for fuel injection systems of internal combustion engines, in particular for the direct injection of fuel into the combustion chamber of an internal combustion engine, with an actuator (9, 10, 13, 20), by the excitation of a lifting movement of a valve needle (3) can be achieved, thereby actuating a valve closing body (4), which forms a sealing seat together with a valve seat surface (6), and with an inlet side fuel supply (16), wherein in the fuel inlet, an adjusting element (50) for adjusting the spring force of a return spring (23) is arranged .
characterized,
in that, in addition to a pressing region (55) with which the adjusting element (50) is pressed in a metallic valve component (13), a further sealing region (57) is provided on the adjusting element (50) with which the adjusting element (50) faces the same or one other valve member (13, 40) is sealed. Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet,
dass der Dichtbereich (57) im zulaufseitigen Bereich des Einstellelements (50) vorgesehen ist, während der Pressbereich (55) am gegenüberliegenden Ende im abströmseitigen Bereich des Einstellelements (50) ausgebildet ist oder
dass der Pressbereich (55) im zulaufseitigen Bereich des Einstellelements (50) vorgesehen ist, während der Dichtbereich (57) am gegenüberliegenden Ende im abströmseitigen Bereich des Einstellelements (50) ausgebildet ist.Fuel injection valve according to claim 1,
characterized,
in that the sealing region (57) is provided in the inlet-side region of the adjusting element (50), while the pressing region (55) is formed at the opposite end in the downstream region of the adjusting element (50) or
in that the pressing region (55) is provided in the inlet-side region of the adjusting element (50), while the sealing region (57) is formed at the opposite end in the downstream region of the adjusting element (50). Brennstoffeinspritzventil nach Anspruch 2,
dadurch gekennzeichnet,
dass der Dichtbereich (57) am Umfang des Einstellelements (50) von mehreren Dichtlamellen (56) gebildet ist.Fuel injection valve according to claim 2,
characterized,
that the sealing portion (57) of a plurality of sealing ribs on the circumference of the adjusting member (50) (56) is formed. Brennstoffeinspritzventil nach Anspruch 3,
dadurch gekennzeichnet,
dass die Dichtlamellen (56) umfangsseitig vollständig und dabei gewindeartig oder beabstandet zueinander separat umlaufen.Fuel injection valve according to claim 3,
characterized,
that the sealing fins (56) completely and thereby threadedly or circulate circumferentially spaced from each other separately. Brennstoffeinspritzventil nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass in dem Einstellelement (50) eine Strömungsdrossel in Form einer Drosselbohrung (54) vorgesehen ist, die einen Öffnungsquerschnitt besitzt, der um ein Vielfaches kleiner ist als der Öffnungsquerschnitt der Brennstoffzufuhr (16).Fuel injection valve according to one of the preceding claims,
characterized,
in that in the adjusting element (50) a flow restrictor in the form of a throttle bore (54) is provided, which has an opening cross section which is many times smaller than the opening cross section of the fuel supply (16). Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet,
dass die Drosselbohrung (54) im axialen Erstreckungsbereich des Dichtbereichs (57) des Einstellelements (50) ausgeformt ist.Fuel injection valve according to claim 1,
characterized,
in that the throttle bore (54) is formed in the axial extension region of the sealing region (57) of the adjusting element (50). Brennstoffeinspritzventil nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass das Einstellelement (50) aus einem Kunststoff im Grundkörper aufgebaut ist, vorzugsweise aus einem organischen polymeren hochtemperaturfesten Thermoplast, wie z.B. Polyether Ether Ketone (PEEK) oder Polyphenylensulfid (PPS).Fuel injection valve according to one of the preceding claims,
characterized,
in that the adjusting element (50) is constructed from a plastic in the main body, preferably from an organic polymeric high-temperature-resistant thermoplastic, such as polyether ether ketone (PEEK) or polyphenylene sulfide (PPS). Brennstoffeinspritzventil nach Anspruch 7,
dadurch gekennzeichnet,
dass im Inneren des Kunststoff-Grundkörpers des Einstellelements (50) ein Filtergewebe (52) als Filterelement eingebracht ist.Fuel injection valve according to claim 7,
characterized,
in that a filter fabric (52) is introduced as filter element in the interior of the plastic basic body of the adjusting element (50). Brennstoffeinspritzventil nach Anspruch 8,
dadurch gekennzeichnet,
dass das Filtergewebe (52) schlauchartig in einem Siebkorb (53) des Grundkörpers aufgenommen ist, der den axial mittleren Bereich des Einstellelements (50) bildet.Fuel injection valve according to claim 8,
characterized,
in that the filter fabric (52) is accommodated in a tubular manner in a sieve basket (53) of the main body which forms the axially central region of the setting element (50). Brennstoffeinspritzventil nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass der Pressbereich (55) des Einstellelements (50) von einer mantelartigen Klemmhülse (51) gebildet wird.Fuel injection valve according to one of the preceding claims,
characterized,
in that the pressing region (55) of the adjusting element (50) is formed by a jacket-like clamping sleeve (51).
EP14193141.0A 2013-12-13 2014-11-14 Fuel injection valve Active EP2891788B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013225812.7A DE102013225812A1 (en) 2013-12-13 2013-12-13 Fuel injector

Publications (2)

Publication Number Publication Date
EP2891788A1 true EP2891788A1 (en) 2015-07-08
EP2891788B1 EP2891788B1 (en) 2016-06-29

Family

ID=51900256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14193141.0A Active EP2891788B1 (en) 2013-12-13 2014-11-14 Fuel injection valve

Country Status (2)

Country Link
EP (1) EP2891788B1 (en)
DE (1) DE102013225812A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018069020A1 (en) * 2016-10-10 2018-04-19 Robert Bosch Gmbh Overflow valve, in particular for a high-pressure pump, high-pressure pump, and fuel injection system
WO2018114082A1 (en) * 2016-12-19 2018-06-28 Robert Bosch Gmbh High-pressure fuel pump and fuel filter device for a high-pressure fuel pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016226135A1 (en) * 2016-12-23 2018-06-28 Robert Bosch Gmbh Fuel injector

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4003228A1 (en) 1990-02-03 1991-08-22 Bosch Gmbh Robert ELECTROMAGNETICALLY ACTUABLE VALVE
US5335863A (en) 1993-05-03 1994-08-09 Siemens Automotive L.P. Filter cartridge mounting for a top-feed fuel injector
EP1229239A2 (en) * 2001-02-02 2002-08-07 Siemens VDO Automotive Corporation Combined filter and adjuster for a fuel injector
US6434822B1 (en) 2000-09-13 2002-08-20 Delphi Technologies, Inc. Method of fuel injector assembly
EP1377747A1 (en) 2001-02-28 2004-01-07 Robert Bosch Gmbh Fuel injection valve with a filter bush
EP1741925A1 (en) * 2005-07-05 2007-01-10 Siemens Aktiengesellschaft Fluid injection valve
DE102009000183A1 (en) * 2009-01-13 2010-07-15 Robert Bosch Gmbh Fuel injection valve for fuel injection systems of internal combustion engines, particularly for direct injection of fuel in combustion chamber of internal combustion engine, has actuator and flow choke provided in fuel supply
EP1296057B1 (en) 2001-09-19 2011-01-05 Filtertek Inc. Integrated fuel filter and calibration tube for a fuel injector
EP2426351A1 (en) 2010-09-02 2012-03-07 Continental Automotive GmbH Adjusting fuel filter assembly and injection valve

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4003228A1 (en) 1990-02-03 1991-08-22 Bosch Gmbh Robert ELECTROMAGNETICALLY ACTUABLE VALVE
US5335863A (en) 1993-05-03 1994-08-09 Siemens Automotive L.P. Filter cartridge mounting for a top-feed fuel injector
US6434822B1 (en) 2000-09-13 2002-08-20 Delphi Technologies, Inc. Method of fuel injector assembly
EP1229239A2 (en) * 2001-02-02 2002-08-07 Siemens VDO Automotive Corporation Combined filter and adjuster for a fuel injector
EP1377747A1 (en) 2001-02-28 2004-01-07 Robert Bosch Gmbh Fuel injection valve with a filter bush
EP1296057B1 (en) 2001-09-19 2011-01-05 Filtertek Inc. Integrated fuel filter and calibration tube for a fuel injector
EP1741925A1 (en) * 2005-07-05 2007-01-10 Siemens Aktiengesellschaft Fluid injection valve
DE102009000183A1 (en) * 2009-01-13 2010-07-15 Robert Bosch Gmbh Fuel injection valve for fuel injection systems of internal combustion engines, particularly for direct injection of fuel in combustion chamber of internal combustion engine, has actuator and flow choke provided in fuel supply
EP2426351A1 (en) 2010-09-02 2012-03-07 Continental Automotive GmbH Adjusting fuel filter assembly and injection valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018069020A1 (en) * 2016-10-10 2018-04-19 Robert Bosch Gmbh Overflow valve, in particular for a high-pressure pump, high-pressure pump, and fuel injection system
WO2018114082A1 (en) * 2016-12-19 2018-06-28 Robert Bosch Gmbh High-pressure fuel pump and fuel filter device for a high-pressure fuel pump

Also Published As

Publication number Publication date
DE102013225812A1 (en) 2015-06-18
EP2891788B1 (en) 2016-06-29

Similar Documents

Publication Publication Date Title
EP3080434A1 (en) Fuel injection valve
DE102009000183A1 (en) Fuel injection valve for fuel injection systems of internal combustion engines, particularly for direct injection of fuel in combustion chamber of internal combustion engine, has actuator and flow choke provided in fuel supply
DE10320592A1 (en) Feed pump, in particular high-pressure fuel pump for an internal combustion engine
EP2884091B1 (en) Fuel injector valve
DE10130205A1 (en) Fuel injector
EP2891788B1 (en) Fuel injection valve
DE102007049963A1 (en) Fuel injector
EP3034857B1 (en) Fuel injector valve
DE102015226528A1 (en) Fuel injector
DE102005048545B4 (en) Fuel injector
DE102006049253A1 (en) Fuel injection valve for mixture-compressed, foreign-ignited internal-combustion engine, involves pressing needle against seat surface in unexcited condition of magnetic coil, and forming shoulder as stop for reset spring at inner pole
EP1913252B1 (en) Fuel injection valve
DE102013225820A1 (en) Fuel injector
DE10256661A1 (en) Fuel injection valve for the fuel injection system of a fuel engine wherein the preliminary stroke spring is arranged radially outwards in a recess of the armature
EP3034856B1 (en) Fuel injector valve
DE102014226003A1 (en) Fuel injector
DE102006046833A1 (en) Fuel injection valve for combustion engine, has armature provided with annular slot on outer wall surface
DE102004047179A1 (en) Fuel injector
DE102015226515A1 (en) Fuel injector
DE102013225817A1 (en) Fuel injector
DE102020215218A1 (en) fuel injector
DE102016226135A1 (en) Fuel injector
DE102020214154A1 (en) fuel injector
DE102020215621A1 (en) fuel injector
DE10123850C2 (en) Fuel injector

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: 20141114

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: 20160108

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

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIC1 Information provided on ipc code assigned before grant

Ipc: F02M 61/16 20060101ALI20160316BHEP

Ipc: F02M 51/06 20060101AFI20160316BHEP

Ipc: F02M 55/00 20060101ALN20160316BHEP

Ipc: F02M 61/20 20060101ALI20160316BHEP

INTG Intention to grant announced

Effective date: 20160406

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 809307

Country of ref document: AT

Kind code of ref document: T

Effective date: 20160715

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: 502014001013

Country of ref document: DE

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: 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: 20160629

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: 20160629

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: 20160929

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20160629

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 3

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

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: 20160930

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: 20160629

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: 20160629

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: 20160629

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: 20160629

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: 20160629

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

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: 20160629

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: 20160629

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: 20160629

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: 20160629

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: 20161029

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

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: 20160629

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: 20160629

Ref country code: BE

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

Effective date: 20161130

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: 20161031

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: 20160629

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502014001013

Country of ref document: DE

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: 20160629

26N No opposition filed

Effective date: 20170330

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

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

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: 20160929

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: 20160629

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: 20161130

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 4

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: 20161114

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

Ref country code: FR

Payment date: 20171124

Year of fee payment: 4

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20161130

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

Ref country code: IT

Payment date: 20171130

Year of fee payment: 4

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: 20141114

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

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: 20160629

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: 20160629

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: 20160629

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

Ref country code: LI

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

Effective date: 20171130

Ref country code: CH

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

Effective date: 20171130

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

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: 20160629

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: 20160629

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: 20160629

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

Effective date: 20181114

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: 20181130

Ref country code: IT

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

Effective date: 20181114

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

Ref country code: GB

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

Effective date: 20181114

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 809307

Country of ref document: AT

Kind code of ref document: T

Effective date: 20191114

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: 20191114

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

Ref country code: DE

Payment date: 20230124

Year of fee payment: 9