EP2426349A1 - Fuel injector - Google Patents

Fuel injector Download PDF

Info

Publication number
EP2426349A1
EP2426349A1 EP20110174533 EP11174533A EP2426349A1 EP 2426349 A1 EP2426349 A1 EP 2426349A1 EP 20110174533 EP20110174533 EP 20110174533 EP 11174533 A EP11174533 A EP 11174533A EP 2426349 A1 EP2426349 A1 EP 2426349A1
Authority
EP
European Patent Office
Prior art keywords
control chamber
nozzle needle
fuel injector
delay element
pressure
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
EP20110174533
Other languages
German (de)
French (fr)
Other versions
EP2426349B1 (en
Inventor
Andreas Koeninger
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 EP2426349A1 publication Critical patent/EP2426349A1/en
Application granted granted Critical
Publication of EP2426349B1 publication Critical patent/EP2426349B1/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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/001—Control chambers formed by movable sleeves
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0043—Two-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way valves

Definitions

  • the invention relates to a fuel injector for a fuel injection system, in particular a common rail injection system, for injecting fuel into the combustion chamber of an internal combustion engine with the features of the preamble of claim 1.
  • the present invention seeks to provide a fuel injector of the type mentioned with improved Kleinstmengengive.
  • the fuel injector should be simple and inexpensive to produce.
  • the hydraulic connection of the two sections preferably takes place via a remaining annular gap between the retardation element and an inner circumferential surface radially delimiting the control chamber.
  • the size of the annular gap is chosen such that the outflow of the fuel from the first control chamber section is throttled into the second control chamber section. In this case, a defined initial position and consequently a defined throttle effect on the volume ratio of the two control chamber sections is ensured via the axial bias of the delay element.
  • a spring element is received in the control chamber for the axial bias of the delay element.
  • the spring element may for example be a coil spring, a plate spring or a corrugated spring.
  • the delay element is at least partially elastically deformable.
  • the axial prestressing of the retardation element can accordingly also be effected or at least supported by an at least partially elastic deformation of the retardation element.
  • the invention can be used to improve the minimum quantity capability, in particular in the case of fuel injectors with a large valve chamber volume and / or with a seat hole nozzle.
  • the invention can be used in all known injector concepts.
  • the delay element accommodated in the control chamber throttles the outflow of the fuel so that the pressure reduction and thus the opening of the nozzle needle is delayed.
  • the adjustment of the throttling effect takes place via the size of the between the delay element and the Control chamber radially limiting inner peripheral surface remaining throttle gap.
  • the delay of the Nadelö Anlagenmaschine Anlagenсти can be further set by setting the following parameters: volume ratio of the two control chamber sections, axial biasing force of the delay element, hydraulic design of the drain and / or the inlet throttle and / or needle seat diameter.
  • a first embodiment of a fuel injector according to the invention is the Fig. 1 a and 1 b, where the Fig. 1b a section of the Fig. 1 a in the area of the control room 5 shows (see dashed line).
  • the in the Fig. 1a and 1b shown fuel injector comprises a nozzle body 3 with a high-pressure bore 2, in which a nozzle needle 1 for releasing and closing at least one injection port 4 is received in a liftable manner.
  • the nozzle change 1 bounded in the axial direction of a control chamber 5, which is also formed in the high-pressure bore 2 and which is connected to the discharge via a drain passage 6 with a low pressure region 7.
  • the drain channel 6 is formed in a housing part 11 which limits the control chamber 5 in the axial direction.
  • the housing part 11 has an opening into the control chamber 5 inlet channel 13, passes through the fuel into the control chamber 5.
  • the control chamber 5 When connecting the control chamber 5 with the low pressure area 7, the control chamber 5 is relieved, that is, the prevailing in the control chamber 5 control chamber pressure drops. The pressure drop in the control chamber 5 in turn causes the nozzle needle 1 opens.
  • a spherical retardation element 8 is arranged in the control chamber 5, which is biased by the spring force of a spring element 10 in the form of a supported on the housing part 11 helical compression spring, axially against the nozzle needle 1. Due to the spherical shape of the delay element 8, a first control chamber section 5. 1 is formed between the ball and the nozzle needle 1, which is connected via a throttle 9 serving as an annular gap between the ball and the high pressure bore 2 in hydraulic communication with a second control chamber section 5.2.
  • the throttle 9 causes that at a pressure drop in the second control chamber section 5.2, the pressure drop in the first control chamber section 5.1 occurs only with delay, so that the opening stroke of the nozzle needle 1 is also delayed.
  • the injection process begins, wherein fuel under high pressure is injected via the at least one injection opening 4 into the combustion chamber of the internal combustion engine.
  • the fuel is supplied to the at least one injection port 4 via a fuel supply 14 and the high-pressure bore 2.
  • Fig. 3 From the diagram of Fig. 3 can be the time-delayed opening stroke of the nozzle needle 1 read clearly.
  • the time is plotted on the x-axis, while is plotted on the y-axis of the stroke of the nozzle needle 1 and the delay element 8 in conjunction with the pressure drop or Duck rise in the two control space sections 5.1 and 5.2.
  • the curve b) shows the pressure drop or increase over time in the second control chamber section 5.2, which is connectable via the drain channel 6 with the low pressure region 7.
  • the curve a) shows the contrast, delayed pressure drop in the first control chamber section 5.1, which is bounded by the nozzle needle 1 and the delay element 8. Similarly, the opening stroke of the nozzle needle 1 is delayed (see curve c).
  • the needle opens when there is equilibrium between the needle seating force and the pressure force in the first control chamber 5.1.
  • the needle opening is preceded by an "opening" of the delay element 8, when the pressure difference in both control space sections 5.1 and 5.2 corresponds to the axial biasing force of the delay element 8.

Landscapes

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

Abstract

The fuel injector comprises a nozzle needle (1), which is guided in a high pressure borehole (2) of a nozzle body (3) for releasing or sealing an injection opening. An intensifier piston is provided, which interacts with the nozzle needle. A movable delay element (8) is provided in a control chamber (5) for forming a throttle (9) between a primary control chamber section (5.1) and a secondary control chamber section (5.2).

Description

Die Erfindung betrifft einen Kraftstoffinjektor für ein Kraftstoffeinspritzsystem, insbesondere ein Common-Rail-Einspritzsystem, zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a fuel injector for a fuel injection system, in particular a common rail injection system, for injecting fuel into the combustion chamber of an internal combustion engine with the features of the preamble of claim 1.

Kraftstoffinjektoren der vorstehend genannten Art weisen eine axial bewegliche Düsennadel zur Steuerung des Einspritzvorgangs auf. Die Düsennadel ist hierzu in einer Hochdruckbohrung eines Düsenkörpers zum Freigeben oder Verschließen wenigstens einer Einspritzöffnung hubbeweglich geführt und begrenzt mit einer Stirnfläche einen innerhalb der Hochdruckbohrung ausgebildeten Steuerraum. Über schaltbare Zu- und Ablaufdrosseln wird im Steuerraum ein Druckaufbau bzw. Druckabbau realisiert, der ein Öffnen bzw. Schließen der Düsennadel bewirkt.Fuel injectors of the aforementioned type have an axially movable nozzle needle for controlling the injection process. The nozzle needle is for this purpose in a high-pressure bore of a nozzle body for releasing or closing at least one injection opening guided in a liftable and limited with an end face formed within the high-pressure bore control chamber. About switchable inlet and outlet throttles pressure build-up or pressure reduction is realized in the control room, which causes an opening or closing of the nozzle needle.

Abhängig vom Ansteuerungskonzept der Zu- und Ablaufdrosseln bzw. von der hydraulischen Gesamtabstimmung des Kraftstoffinjektors kann es bei minimaler Ansteuerdauer eines elektrischen Schaltelementes zu relativ großen Einspritzmengen kommen, weil der Steuerraum zu lange abgesteuert wird und demzufolge die Düsennadel zu lange geöffnet bleibt. Diese Problematik (schlechte Kleinstmengenfähigkeit) tritt insbesondere bei Einsatz von Sitzlochdüsen auf, da diese eine hohe öffnende Sitzkraft schon bei kleinen Nadelhüben aufweisen.Depending on the control concept of the inlet and outlet throttles or of the hydraulic overall tuning of the fuel injector, with relatively small injection periods of an electrical switching element, relatively large injection quantities can occur because the control chamber is deactivated too long and, consequently, the nozzle needle remains open too long. This problem (poor Kleinstmengenfähigkeit) occurs especially when using seat hole nozzles, as they have a high opening seat force even with small needle strokes.

Stand der TechnikState of the art

Aus der Offenlegungsschrift DE 101 64 123 A1 geht ein gattungsgemäßer Kraftstoffinjektor hervor, mittels dessen auch sehr kleine Einspritzmengen mit großer Präzision abgegeben werden können. Hierzu ist im Kraftstoffinjektor zwischen Ventilsitz und Steuerraum ein elastisches Verzögerungsglied angeordnet, das den Öffnungshub der Düsennadel bei einem Druckabfall im Steuerraum zeitlich verzögert. In Schließstellung wird die Düsennadel zusammen mit dem elastischen Verzögerungsglied aufgrund des hydraulischen Drucks im Steuerraum gegen den Ventilsitz gedrückt, wobei das elastische Verzögerungsglied komprimiert wird. Bei einem Druckabfall im Steuerraum entspannt sich zunächst das elastische Verzögerungsglied, wobei es sich ausdehnt und die Düsennadel in Anlage mit dem Ventilsitz hält. Erst wenn das elastische Verzögerungsglied sich vollständig bis auf seine weitgehend entlastete Länge ausgedehnt hat, hebt die Düsennadel vom Ventilsitz ab und gibt so den Durchfluss für den Kraftstoff frei. Auf diese Weise können auch sehr kleine Voreinspritzmengen realisiert werden.From the publication DE 101 64 123 A1 goes out a generic fuel injector, by means of which even very small injection quantities can be delivered with great precision. This is in the fuel injector between Valve seat and control chamber arranged an elastic delay element, which delays the opening stroke of the nozzle needle at a pressure drop in the control chamber. In the closed position, the nozzle needle is pressed together with the elastic delay member due to the hydraulic pressure in the control chamber against the valve seat, wherein the elastic delay member is compressed. At a pressure drop in the control room, first relaxes the elastic delay element, wherein it expands and holds the nozzle needle in contact with the valve seat. Only when the elastic delay element has fully expanded to its largely relieved length, the nozzle needle lifts off the valve seat and thus releases the flow for the fuel. In this way, even very small pre-injection quantities can be realized.

Aus der Offenlegungsschrift DE 100 2005 027 853 A1 ist darüber hinaus ein Kraftstoffinjektor mit einem im Steuerraum aufgenommenen Anschlagelement zur Einstellung des Maximalhubes der Düsennadel bekannt. Über die Auslegung des Anschlagelementes kann ferner eine hydraulische Dämpfung bewirkt werden, die verhindern soll, dass es nach Durchfahren des Maximalhubes der Düsennadel zum Prellen kommt. Zum Einen wird dadurch die Geräuschentwicklung gemindert, zum Anderen kann der Schließzeitpunkt genauer eingestellt werden, da der Zustand der Düsennadel zu Beginn der Schließbewegung bekannt ist. Der Steuerraum wird durch das Anschlagelement in einen oberen und einen unteren Teilraum geteilt, welche über eine im Anschlagelement ausgebildete zentrale Bohrung und/oder einen das Anschlagelement umgebenden ringförmigen Spalt hydraulisch verbunden sind. Über die Größe der zentralen Bohrung und/oder des Ringspalts ist die Dämpfungswirkung einstellbar.From the publication DE 100 2005 027 853 A1 In addition, a fuel injector with a recorded in the control chamber stop member for adjusting the maximum stroke of the nozzle needle is known. On the interpretation of the stop element, a hydraulic damping can also be effected, which is to prevent it from bouncing after passing through the maximum stroke of the nozzle needle. On the one hand, the noise is reduced, on the other hand, the closing time can be set more precisely, since the state of the nozzle needle is known at the beginning of the closing movement. The control chamber is divided by the stop element into an upper and a lower partial space, which are hydraulically connected via a central bore formed in the stop element and / or an annular gap surrounding the stop element. About the size of the central bore and / or the annular gap, the damping effect is adjustable.

Ausgehend von dem vorstehend genannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen Kraftstoffinjektor der eingangs genannten Art mit verbesserter Kleinstmengenfähigkeit anzugeben. Zudem soll der Kraftstoffinjektor einfach aufgebaut und kostengünstig herstellbar sein.Based on the above-mentioned prior art, the present invention seeks to provide a fuel injector of the type mentioned with improved Kleinstmengenfähigkeit. In addition, the fuel injector should be simple and inexpensive to produce.

Die Aufgabe wird gelöst durch eine Kraftstoffinjektor mit den Merkmalen des Anspruchs 1. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.The object is achieved by a fuel injector with the features of claim 1. Advantageous developments of the invention are specified in the dependent claims.

Offenbarung der ErfindungDisclosure of the invention

Der vorgeschlagene Kraftstoffinjektor weist eine Düsennadel auf, die in einer Hochdruckbohrung eines Düsenkörpers zum Freigeben oder Verschließen wenigstens einer Einspritzöffnung hubbeweglich geführt ist. Ferner weist der Kraftstoffinjektor einen Steuerraum auf, der von der Düsennadel oder einem mit der Düsennadel zusammenwirkenden Übersetzerkolben axial begrenzt wird und zur Entlastung über einen Ablaufkanal mit einem Niederdruckbereich verbindbar ist. Erfindungsgemäß ist im Steuerraum ein bewegliches, axial vorgespanntes Verzögerungselement zur Ausbildung einer Drossel zwischen einem ersten Steuerraumabschnitt und einem zweiten Steuerraumabschnitt aufgenommen. Auch bei dem erfindungsgemäßen Kraftstoffinjektor wird demnach der Steuerraum über ein zusätzliches Element in zwei hydraulisch verbundene Abschnitte unterteilt. Die hydraulische Verbindung der beiden Abschnitte erfolgt vorzugsweise über einen verbleibenden Ringspalt zwischen dem Verzögerungselement und einer den Steuerraum radial begrenzenden Innenumfangsfläche. Die Größe des Ringspalts ist derart gewählt, dass der Abfluss des Kraftstoffs aus dem ersten Steuerraumabschnitt in den zweiten Steuerraumabschnitt gedrosselt wird. Dabei wird über die axiale Vorspannung des Verzögerungselementes eine definierte Ausgangslage und demzufolge eine definierte Drosselwirkung über das Volumenverhältnis der beiden Steuerraumabschnitte sichergestellt.The proposed fuel injector has a nozzle needle, which is guided in a high-pressure bore of a nozzle body for releasing or closing at least one injection opening in a liftable manner. Further, the fuel injector has a control chamber which is axially bounded by the nozzle needle or a translating piston cooperating with the nozzle needle and can be connected to a low-pressure region for relief via a drainage channel. According to the invention a movable, axially biased delay element for forming a throttle between a first control chamber portion and a second control chamber portion is added in the control room. Also in the case of the fuel injector according to the invention, the control chamber is accordingly subdivided into two hydraulically connected sections via an additional element. The hydraulic connection of the two sections preferably takes place via a remaining annular gap between the retardation element and an inner circumferential surface radially delimiting the control chamber. The size of the annular gap is chosen such that the outflow of the fuel from the first control chamber section is throttled into the second control chamber section. In this case, a defined initial position and consequently a defined throttle effect on the volume ratio of the two control chamber sections is ensured via the axial bias of the delay element.

Gemäß einer bevorzugten Ausführungsform der Erfindung ist zur axialen Vorspannung des Verzögerungselementes ein Federelement im Steuerraum aufgenommen. Das Federelement kann beispielsweise eine Schraubenfeder, eine Tellerfeder oder eine Wellfeder sein. Alternativ oder ergänzend kann vorgesehen sein, dass das Verzögerungselement zumindest teilweise elastisch verformbar ausgebildet ist. Die axiale Vorspannung des Verzögerungselementes kann demnach auch durch eine zumindest teilweise elastische Verformung des Verzögerungselementes bewirkt oder zumindest unterstützt werden.According to a preferred embodiment of the invention, a spring element is received in the control chamber for the axial bias of the delay element. The spring element may for example be a coil spring, a plate spring or a corrugated spring. Alternatively or additionally, it may be provided that the delay element is at least partially elastically deformable. The axial prestressing of the retardation element can accordingly also be effected or at least supported by an at least partially elastic deformation of the retardation element.

Bei Einsatz eines Federelementes ist weiterhin bevorzugt vorgesehen, dass das Federelement an der Düsennadel bzw. an dem Übersetzerkolben oder an einem Gehäuseteil des Kraftstoffinjektors abgestützt ist. Das Federelement kann somit sowohl im ersten Steuerraumabschnitt als auch im zweiten Steuerraumabschnitt angeordnet sein. Als vorteilhaft erweist sich die Anordnung des Federelementes im zweiten Steuerraumabschnitt, wenn das zur Abstützung der Federelementes vorgesehene Gehäuseteil beispielsweise eine Drosselplatte ist und es eine Abdeckung des in der Drosselplatte ausgebildeten Ablaufkanals bzw. Ablaufdrossel zu verhindern gilt. Gleiches gilt in Bezug auf einen in der Drosselplatte angeordneten Zulaufkanal bzw. Zulaufdrossel. Ohne Zwischenschaltung des Federelementes könnte das Verzögerungselement den Zu- oder Abfluss von Kraftstoff blockieren.When using a spring element is further preferably provided that the spring element is supported on the nozzle needle or on the booster piston or on a housing part of the fuel injector. The spring element can thus be arranged both in the first control chamber section and in the second control chamber section. To be advantageous, the arrangement of the spring element proves in the second control chamber section, if that for supporting the spring element provided housing part, for example, is a throttle plate and there is a cover of the formed in the throttle plate drainage channel or outlet throttle is to be prevented. The same applies with respect to an inlet channel or inlet throttle arranged in the throttle plate. Without the interposition of the spring element, the delay element could block the inflow or outflow of fuel.

Um ein hydraulisches Kleben des Verzögerungselementes an der Düsennadel, dem Übersetzerkolben und/oder dem Gehäuseteil zu verhindern ist weiterhin bevorzugt das Verzögerungselement zumindest teilweise sphärisch geformt. In Anlage mit der Düsennadel, dem Übersetzerkolben und/oder dem Gehäuseteil verbleibt demnach ein als erster Steuerraumabschnitt und/oder als zweiter Steuerraumabschnitt dienender Druckraum. Vorzugsweise ist das Verzögerungselement kugelförmig ausgebildet, so dass die an der Düsennadel, dem Übersetzerkolben und/oder dem Gehäuseteil anliegende Fläche auf ein Minimum reduziert wird.In order to prevent hydraulic adhesion of the delay element to the nozzle needle, the booster piston and / or the housing part, the delay element is furthermore preferably at least partially spherically shaped. In contact with the nozzle needle, the booster piston and / or the housing part thus remains serving as a first control room section and / or as a second control room section pressure chamber. Preferably, the delay element is spherical, so that the voltage applied to the nozzle needle, the booster piston and / or the housing part surface is reduced to a minimum.

Gemäß einem weiteren bevorzugten Ausführungsbeispiel der Erfindung wird der Steuerraum in radialer Richtung von einer in die Hochdruckbohrung eingesetzten Hülse begrenzt. Die Hülse kann beispielsweise als Dichthülse dienen und mittels einer Feder in axialer Richtung gegen die Drosselplatte vorgespannt sein.According to a further preferred embodiment of the invention, the control chamber is bounded in the radial direction by a sleeve inserted into the high-pressure bore. The sleeve may for example serve as a sealing sleeve and be biased by a spring in the axial direction against the throttle plate.

Vorteilhafterweise ist bzw. sind das Verzögerungselement und/oder das Federelement zur Hubeinstellung der Düsennadel einsetzbar. Das Verzögerungselement dient somit zugleich als Anschlagelement, da es den Hub der Düsennadel in axialer Richtung begrenzt. Ferner kann die Federkraft des Federelementes derart eingestellt werden, dass alternativ oder ergänzend auch eine Hubeinstellung über das Federelement bewirkbar ist.Advantageously, the delay element and / or the spring element can be used to adjust the stroke of the nozzle needle. The delay element thus serves at the same time as a stop element, since it limits the stroke of the nozzle needle in the axial direction. Furthermore, the spring force of the spring element can be adjusted such that, alternatively or additionally, a stroke adjustment via the spring element can be effected.

Die Erfindung ist zur Verbesserung der Kleinstmengenfähigkeit insbesondere bei Kraftstoffinjektoren mit einem großen Ventilraumvolumen und/oder mit einer Sitzlochdüse einsetzbar. Grundsätzlich ist die Erfindung jedoch in allen bekannten Injektorkonzepten einsetzbar. Das in den Steuerraum aufgenommene Verzögerungselement drosselt den Abfluss des Kraftstoffs, so dass der Druckabbau und damit das Öffnen der Düsennadel verzögert wird. Die Einstellung der Drosselwirkung erfolgt über die Größe des zwischen dem Verzögerungsglied und der den Steuerraum radial begrenzenden Innenumfangsfläche verbleibenden Drosselspalt. Die Verzögerung des Nadelöffnungshubes kann weiterhin durch Festlegung der folgenden Parameter eingestellt werden: Volumenverhältnis der beiden Steuerraumabschnitte, axiale Vorspannkraft des Verzögerungselementes, hydraulische Auslegung der Ablauf- und/oder der Zulaufdrossel und/oder Nadelsitzdurchmesser. Ferner können durch das erfindungsgemäße Verzögerungselement exemplarspezifische Einspritzmengenstreuungen kostengünstig korrigiert werden.The invention can be used to improve the minimum quantity capability, in particular in the case of fuel injectors with a large valve chamber volume and / or with a seat hole nozzle. In principle, however, the invention can be used in all known injector concepts. The delay element accommodated in the control chamber throttles the outflow of the fuel so that the pressure reduction and thus the opening of the nozzle needle is delayed. The adjustment of the throttling effect takes place via the size of the between the delay element and the Control chamber radially limiting inner peripheral surface remaining throttle gap. The delay of the Nadelöffnungshubes can be further set by setting the following parameters: volume ratio of the two control chamber sections, axial biasing force of the delay element, hydraulic design of the drain and / or the inlet throttle and / or needle seat diameter. Furthermore, by means of the delay element according to the invention, it is possible to cost-effectively correct copy-specific injection quantity scatterings.

Bevorzugte Ausführungsformen der Erfindung werden nachfolgend anhand der Zeichnungen näher erläutert. Diese zeigen:

  • Fig. 1a, b jeweils einen Teillängsschnitt durch eine erste Ausführungsform eines erfindungsgemäßen Kraftstoffinjektors,
  • Fig. 2a, b jeweils einen Teillängsschnitt durch eine zweite Ausführungsform eines erfindungsgemäßen Kraftstoffinjektors und
  • Fig. 3 ein Diagramm zur prinzipiellen Darstellung des Bewegungsablaufs des Verzögerungselementes bzw. der Düsennadel.
Preferred embodiments of the invention are explained below with reference to the drawings. These show:
  • Fig. 1a, b each a partial longitudinal section through a first embodiment of a fuel injector according to the invention,
  • Fig. 2a, b in each case a partial longitudinal section through a second embodiment of a fuel injector according to the invention and
  • Fig. 3 a diagram for the basic representation of the movement of the delay element or the nozzle needle.

Ausführliche Beschreibung der ZeichnungenDetailed description of the drawings

Eine erste Ausführungsform eines erfindungsgemäßen Kraftstoffinjektors ist den Fig. 1 a und 1 b zu entnehmen, wobei die Fig. 1b einen Ausschnitt der Fig. 1 a im Bereich des Steuerraums 5 zeigt (siehe gestrichelte Linie). Der in den Fig. 1a und 1b dargestellte Kraftstoffinjektor umfasst einen Düsenkörper 3 mit einer Hochdruckbohrung 2, in welcher eine Düsennadel 1 zum Freigeben und Verschließen wenigstens einer Einspritzöffnung 4 hubbeweglich aufgenommen ist. Die Düsenandel 1 begrenzt in axialer Richtung einen Steuerraum 5, der ebenfalls in der Hochdruckbohrung 2 ausgebildet ist und der zur Entlastung über einen Ablaufkanal 6 mit einem Niederdruckbereich 7 verbindbar ist. Der Ablaufkanal 6 ist in einem Gehäuseteil 11 ausgebildet, das den Steuerraum 5 in axialer Richtung begrenzt. Neben dem Ablaufkanal 6 weist das Gehäuseteil 11 einen in den Steuerraum 5 mündenden Zulaufkanal 13 auf, über den Kraftstoff in den Steuerraum 5 gelangt. Bei einer Verbindung des Steuerraums 5 mit dem Niederdruckbereich 7 wird der Steuerraum 5 entlastet, das heißt der im Steuerraum 5 vorherrschende Steuerraumdruck fällt ab. Der Druckabfall im Steuerraum 5 wiederum bewirkt, dass die Düsennadel 1 öffnet.A first embodiment of a fuel injector according to the invention is the Fig. 1 a and 1 b, where the Fig. 1b a section of the Fig. 1 a in the area of the control room 5 shows (see dashed line). The in the Fig. 1a and 1b shown fuel injector comprises a nozzle body 3 with a high-pressure bore 2, in which a nozzle needle 1 for releasing and closing at least one injection port 4 is received in a liftable manner. The nozzle change 1 bounded in the axial direction of a control chamber 5, which is also formed in the high-pressure bore 2 and which is connected to the discharge via a drain passage 6 with a low pressure region 7. The drain channel 6 is formed in a housing part 11 which limits the control chamber 5 in the axial direction. In addition to the drainage channel 6, the housing part 11 has an opening into the control chamber 5 inlet channel 13, passes through the fuel into the control chamber 5. When connecting the control chamber 5 with the low pressure area 7, the control chamber 5 is relieved, that is, the prevailing in the control chamber 5 control chamber pressure drops. The pressure drop in the control chamber 5 in turn causes the nozzle needle 1 opens.

Zur Realisierung auch kleinster Einspritzmengen wird der Öffnungshub der Düsennadel 1 bei dem erfindungsgemäßen Kraftstoffinjektor verzögert. Hierzu ist im Steuerraum 5 ein kugelförmiges Verzögerungselement 8 angeordnet, das von der Federkraft eines Federelementes 10 in Form einer am Gehäuseteil 11 abgestützten Schraubendruckfeder, axial gegen die Düsennadel 1 vorgespannt ist. Aufgrund der Kugelform des Verzögerungselementes 8 wird zwischen der Kugel und der Düsennadel 1 ein erster Steuerraumabschnitt 5. 1 ausgebildet, der über einen als Drossel 9 dienenden Ringspalt zwischen der Kugel und der Hochdruckbohrung 2 in hydraulischer Verbindung mit einem zweiten Steuerraumabschnitt 5.2 steht. Die Drossel 9 bewirkt, dass bei einem Druckabfall im zweiten Steuerraumabschnitt 5.2 der Druckabfall im ersten Steuerraumabschnitt 5.1 erst mit Verzögerung eintritt, so dass der Öffnungshub der Düsennadel 1 ebenfalls verzögert wird. Mit dem Öffnen der Düsennadel 1 beginnt der Einspritzvorgang, wobei unter hohem Druck stehender Kraftstoff über die wenigstens eine Einspritzöffnung 4 in den Brennraum der Brennkraftmaschine eingespritzt wird. Der Kraftstoff wird der wenigstens einen Einspritzöffnung 4 über eine Kraftstoffzuführung 14 und die Hochdruckbohrung 2 zugeführt.To realize even the smallest injection quantities of the opening stroke of the nozzle needle 1 is delayed in the fuel injector according to the invention. For this purpose, a spherical retardation element 8 is arranged in the control chamber 5, which is biased by the spring force of a spring element 10 in the form of a supported on the housing part 11 helical compression spring, axially against the nozzle needle 1. Due to the spherical shape of the delay element 8, a first control chamber section 5. 1 is formed between the ball and the nozzle needle 1, which is connected via a throttle 9 serving as an annular gap between the ball and the high pressure bore 2 in hydraulic communication with a second control chamber section 5.2. The throttle 9 causes that at a pressure drop in the second control chamber section 5.2, the pressure drop in the first control chamber section 5.1 occurs only with delay, so that the opening stroke of the nozzle needle 1 is also delayed. With the opening of the nozzle needle 1, the injection process begins, wherein fuel under high pressure is injected via the at least one injection opening 4 into the combustion chamber of the internal combustion engine. The fuel is supplied to the at least one injection port 4 via a fuel supply 14 and the high-pressure bore 2.

Die in den Fig. 2a und 2b dargestellte weitere Ausführungsform eines erfindungsgemäßen Kraftstoffinjektors unterscheidet sich von der der Fig. 1a und 1b lediglich dadurch, dass das brennraumabgewandte Ende der Düsennadel 1 in einer Hülse 12 geführt ist, die dichtend am Gehäuseteil 11 anliegt und somit den Steuerraum 5 radial begrenzt. Zur Sicherstellung der dichtenden Anlage ist die Hülse 12 mittels der Federkraft einer Feder 15 axial gegen das Gehäuseteil 11 vorgespannt. Hierzu ist die Feder 15 einerseits an einem radialen Absatz der Düsennadel 1 und andererseits an einer Stirnfläche der Hülse 12 abgestützt. Die Funktionsweise entspricht der der Ausführungsform der Fig. 1a und 1b, weshalb auf die im Zusammenhang mit der Beschreibung der Fig. 1a und 1b gemachten Ausführungen verwiesen wird.The in the Fig. 2a and 2b illustrated further embodiment of a fuel injector according to the invention differs from that of Fig. 1a and 1b merely in that the combustion chamber facing away from the end of the nozzle needle 1 is guided in a sleeve 12 which bears sealingly on the housing part 11 and thus the control chamber 5 radially limited. To ensure the sealing system, the sleeve 12 is biased by the spring force of a spring 15 axially against the housing part 11. For this purpose, the spring 15 is supported on the one hand on a radial shoulder of the nozzle needle 1 and on the other hand on an end face of the sleeve 12. The operation corresponds to that of the embodiment of Fig. 1a and 1b , which is why in connection with the description of the Fig. 1a and 1b referenced statements.

Aus dem Diagramm der Fig. 3 lässt sich der zeitlich verzögerte Öffnungshub der Düsennadel 1 deutlich ablesen. Auf der x-Achse ist die Zeit aufgetragen, während auf der y-Achse der Hub der Düsennadel 1 bzw. des Verzögerungselementes 8 in Verbindung mit dem Druckabfall bzw. Duckanstieg in den beiden Steuerraumabschnitten 5.1 und 5.2 aufgetragen ist. Die Kurve b) zeigt den Druckabfall bzw. -anstieg über die Zeit im zweiten Steuerraumabschnitt 5.2, der über den Ablaufkanal 6 mit dem Niederdruckbereich 7 verbindbar ist. Die Kurve a) zeigt den demgegenüber verzögerten Druckabfall im ersten Steuerraumabschnitt 5.1, der von der Düsennadel 1 und dem Verzögerungselement 8 begrenzt wird. In entsprechender Weise setzt auch der Öffnungshub der Düsennadel 1 verzögert ein (siehe Kurve c). Die Nadel öffnet, wenn zwischen der Nadelsitzkraft und der Druckkraft im ersten Steuerraum 5.1 Gleichgewicht herrscht. Dem Nadelöffnen geht ein "Öffnen" des Verzögerungselementes 8 voraus, wenn die Druckdifferenz in beiden Steuerraumabschnitten 5.1 und 5.2 der axialen Vorspannkraft des Verzögerungselementes 8 entspricht.From the diagram of Fig. 3 can be the time-delayed opening stroke of the nozzle needle 1 read clearly. The time is plotted on the x-axis, while is plotted on the y-axis of the stroke of the nozzle needle 1 and the delay element 8 in conjunction with the pressure drop or Duck rise in the two control space sections 5.1 and 5.2. The curve b) shows the pressure drop or increase over time in the second control chamber section 5.2, which is connectable via the drain channel 6 with the low pressure region 7. The curve a) shows the contrast, delayed pressure drop in the first control chamber section 5.1, which is bounded by the nozzle needle 1 and the delay element 8. Similarly, the opening stroke of the nozzle needle 1 is delayed (see curve c). The needle opens when there is equilibrium between the needle seating force and the pressure force in the first control chamber 5.1. The needle opening is preceded by an "opening" of the delay element 8, when the pressure difference in both control space sections 5.1 and 5.2 corresponds to the axial biasing force of the delay element 8.

Claims (6)

Kraftstoffinjektor für ein Kraftstoffeinspritzsystem, insbesondere ein Common-Rail-Einspritzsystem, mit einer Düsennadel (1), die in einer Hochdruckbohrung (2) eines Düsenkörpers (3) zum Freigeben oder Verschließen wenigstens einer Einspritzöffnung (4) hubbeweglich geführt ist, wobei die Düsennadel (1) oder ein mit der Düsennadel (1) zusammenwirkender Übersetzerkolben einen Steuerraum (5) axial begrenzen, der zur Entlastung über einen Ablaufkanal (6) mit einem Niederdruckbereich (7) verbindbar ist,
dadurch gekennzeichnet, dass im Steuerraum (5) ein bewegliches, axial vorgespanntes Verzögerungselement (8) zur Ausbildung einer Drossel (9) zwischen einem ersten Steuerraumabschnitt (5.1) und einem zweiten Steuerraumabschnitt (5.2) aufgenommen ist.Fuel injector for a fuel injection system, in particular a common rail injection system, with a nozzle needle (1) which is guided in a high-pressure bore (2) of a nozzle body (3) for releasing or closing at least one injection opening (4), wherein the nozzle needle ( 1) or a translating piston cooperating with the nozzle needle (1) axially delimiting a control chamber (5) which can be connected to a low-pressure region (7) via a discharge channel (6),
characterized in that in the control chamber (5) a movable, axially biased delay element (8) for forming a throttle (9) between a first control chamber section (5.1) and a second control chamber section (5.2) is added. Kraftstoffinjektor nach Anspruch 1,
dadurch gekennzeichnet, dass zur axialen Vorspannung des Verzögerungselementes (8) ein Federelement (10) im Steuerraum (5) aufgenommen ist und/oder das Verzögerungselement (8) zumindest teilweise elastisch verformbar ausgebildet ist.Fuel injector according to claim 1,
characterized in that a spring element (10) is accommodated in the control chamber (5) for axial prestressing of the retardation element (8) and / or the retardation element (8) is formed at least partially elastically deformable. Kraftstoffinjektor nach Anspruch 2,
dadurch gekennzeichnet, dass das Federelement (10) an der Düsennadel (1), bzw. an dem Übersetzerkolben oder an einem Gehäuseteil (11) des Kraftstoffinjektors abgestützt ist.Fuel injector according to claim 2,
characterized in that the spring element (10) is supported on the nozzle needle (1), or on the booster piston or on a housing part (11) of the fuel injector. Kraftstoffinjektor nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Verzögerungselement (8) zumindest teilweise sphärisch geformt ist, so dass in Anlage mit der Düsennadel (1), dem Übersetzerkolben und/oder dem Gehäuseteil (11) ein als erster Steuerraumabschnitt (5.1) und/oder als zweiter Steuerraumabschnitt (5.2) dienender Druckraum verbleibt.Fuel injector according to one of the preceding claims, characterized in that the delay element (8) is at least partially spherically shaped, so that in contact with the nozzle needle (1), the booster piston and / or the housing part (11) as a first control chamber section (5.1) and / or as the second control chamber section (5.2) serving pressure chamber remains. Kraftstoffinjektor nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Steuerraum (5) in radialer Richtung von einer in die Hochdruckbohrung (2) eingesetzten Hülse (12) begrenzt wird.Fuel injector according to one of the preceding claims, characterized in that the control chamber (5) is delimited in the radial direction by a sleeve (12) inserted into the high-pressure bore (2). Kraftstoffinjektor nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Verzögerungselement (8) und/oder das Federelement (10) zur Hubeinstellung der Düsennadel (1) einsetzbar ist bzw. sind.Fuel injector according to one of the preceding claims, characterized in that the delay element (8) and / or the spring element (10) for adjusting the stroke of the nozzle needle (1) can be used or are.
EP11174533.7A 2010-09-07 2011-07-19 Fuel injector Not-in-force EP2426349B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010040316A DE102010040316A1 (en) 2010-09-07 2010-09-07 fuel injector

Publications (2)

Publication Number Publication Date
EP2426349A1 true EP2426349A1 (en) 2012-03-07
EP2426349B1 EP2426349B1 (en) 2015-07-01

Family

ID=44582249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11174533.7A Not-in-force EP2426349B1 (en) 2010-09-07 2011-07-19 Fuel injector

Country Status (2)

Country Link
EP (1) EP2426349B1 (en)
DE (1) DE102010040316A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013002969B3 (en) * 2013-02-22 2014-05-22 L'orange Gmbh fuel injector

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0393590A2 (en) * 1989-04-17 1990-10-24 Nippondenso Co., Ltd. Fuel injection device for diesel engines
EP0582993A1 (en) * 1992-08-11 1994-02-16 Nippondenso Co., Ltd. Accumulator fuel injection apparatus
EP1186773A2 (en) * 2000-09-06 2002-03-13 Toyota Jidosha Kabushiki Kaisha Fuel injector
DE10164123A1 (en) 2001-12-24 2003-01-30 Bosch Gmbh Robert Fuel injection device for direct injection internal combustion engine with valve device having elastic delay element between valve seat and control space at its opposite ends
DE102004005451A1 (en) * 2004-02-04 2005-08-25 Robert Bosch Gmbh Fuel injection system for internal combustion engines
DE102005027853A1 (en) 2005-06-16 2006-12-21 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
WO2009153086A1 (en) * 2008-06-19 2009-12-23 Robert Bosch Gmbh Fuel injection valve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5493966B2 (en) * 2009-06-02 2014-05-14 株式会社デンソー Fuel injection device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0393590A2 (en) * 1989-04-17 1990-10-24 Nippondenso Co., Ltd. Fuel injection device for diesel engines
EP0582993A1 (en) * 1992-08-11 1994-02-16 Nippondenso Co., Ltd. Accumulator fuel injection apparatus
EP1186773A2 (en) * 2000-09-06 2002-03-13 Toyota Jidosha Kabushiki Kaisha Fuel injector
DE10164123A1 (en) 2001-12-24 2003-01-30 Bosch Gmbh Robert Fuel injection device for direct injection internal combustion engine with valve device having elastic delay element between valve seat and control space at its opposite ends
DE102004005451A1 (en) * 2004-02-04 2005-08-25 Robert Bosch Gmbh Fuel injection system for internal combustion engines
DE102005027853A1 (en) 2005-06-16 2006-12-21 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
WO2009153086A1 (en) * 2008-06-19 2009-12-23 Robert Bosch Gmbh Fuel injection valve

Also Published As

Publication number Publication date
DE102010040316A1 (en) 2012-03-08
EP2426349B1 (en) 2015-07-01

Similar Documents

Publication Publication Date Title
EP1342005B1 (en) Fuel injection system for internal combustion engines
EP2116717B1 (en) Fuel injector
EP2310662B1 (en) Fuel injector
EP2084392A1 (en) Fuel injector
DE102005062549A1 (en) Fuel injector for internal combustion engine has control valve fully integrated into fuel injector, high pressure fuel storage device connected to control chamber and integrated into fuel injector
EP2011995B1 (en) Injector with a valve element which opens to the outside
EP2511514B1 (en) Fuel injector valve
EP2426349B1 (en) Fuel injector
DE102009003145A1 (en) Fuel injector for internal combustion engine for injecting fuel under high pressure, comprises nozzle needle and control valve which controls nozzle needle for opening and closing injection opening
DE102007005382A1 (en) Injector i.e. common rail injector, for injecting fuel e.g. diesel, into combustion chamber of internal-combustion engine, has control valve for varying control pressure, and fuel tank connected with nozzle chamber via throttle channel
DE102007010498A1 (en) Injector, particularly common-rail-injector for injecting fuel into combustion chamber of internal-combustion engine, has control valve connected with high pressure area and separated from low pressure area in primary switching position
DE102012224398A1 (en) Fuel injection valve for injecting fuel into combustion chambers of high-speed self-ignition engine of vehicle, has switching case cooperating with sealing seat placed at inner side of valve piece to open and close inlet throttle
DE102006047935A1 (en) Fuel injector for an internal combustion engine
DE102006050033A1 (en) Injector, in particular common rail injector
EP1961953A1 (en) Multiway valve
DE102006009069A1 (en) Fuel injection valve, especially for diesel engine, has pin element aperture for ball element, spring element acting on pin element towards initial position in which connection between valve chamber, low pressure region is closed
DE102007034319A1 (en) injector
WO2003081021A1 (en) Device for damping vibrations on fuel injection systems having a high-pressure accumulating space
EP2165069B1 (en) Control valve, particularly for a fuel injector of an internal combustion engine
EP2412965A2 (en) Fuel injector valve
DE102007001365A1 (en) Common rail injector, for injecting e.g. petrol, into combustion chamber of internal combustion engine, has switching chamber connected with low pressure area by connecting channel that is closed and opened by control valve
WO2009130063A1 (en) Injector
DE102006027484A1 (en) Fuel injector for an internal combustion motor, with a common rail fuel injection system, has the armature of the magnetic setting unit in the equalizing zone with the control piston pressure surface to reduce injector height
DE102013224960A1 (en) fuel injector
DE102004025729A1 (en) Fuel injection valve for an internal combustion engine

Legal Events

Date Code Title Description
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

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: 20120907

17Q First examination report despatched

Effective date: 20140217

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20150407

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: AT

Ref legal event code: REF

Ref document number: 734105

Country of ref document: AT

Kind code of ref document: T

Effective date: 20150715

Ref country code: CH

Ref legal event code: EP

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: 502011007188

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20150701

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: 20150701

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: 20151001

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: 20150701

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: 20151002

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: 20150701

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: 20151102

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: 20150701

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: 20151101

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: 20150701

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: 20150701

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: 20150701

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: 20150701

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

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: 20150701

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502011007188

Country of ref document: DE

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: 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: 20150701

Ref country code: CH

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

Effective date: 20150731

Ref country code: LI

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

Effective date: 20150731

Ref country code: IT

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: 20150701

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: 20150701

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: 20150701

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: 20150701

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

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

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: 20150701

26N No opposition filed

Effective date: 20160404

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

Effective date: 20151001

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: 20151001

Ref country code: IE

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

Effective date: 20150719

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

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: 20150701

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20160729

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: 20150901

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: 20150701

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: 20150701

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: 20150701

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: 20110719

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: 20150701

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: 20150701

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: 20150731

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: 20150701

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 734105

Country of ref document: AT

Kind code of ref document: T

Effective date: 20160719

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: 20160719

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: 20150719

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: 20150701

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: 20150701

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

Ref country code: DE

Payment date: 20190924

Year of fee payment: 9

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502011007188

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: 20210202