EP2331807B1 - Fuel injector and surface treatment method - Google Patents

Fuel injector and surface treatment method Download PDF

Info

Publication number
EP2331807B1
EP2331807B1 EP09781758.9A EP09781758A EP2331807B1 EP 2331807 B1 EP2331807 B1 EP 2331807B1 EP 09781758 A EP09781758 A EP 09781758A EP 2331807 B1 EP2331807 B1 EP 2331807B1
Authority
EP
European Patent Office
Prior art keywords
armature
fuel injector
control valve
injector according
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.)
Active
Application number
EP09781758.9A
Other languages
German (de)
French (fr)
Other versions
EP2331807A1 (en
Inventor
Christian Grimminger
Andreas Fath
Holger Rapp
Helmut Clauss
Matthias Schnell
Oezguer Tuerker
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 EP2331807A1 publication Critical patent/EP2331807A1/en
Application granted granted Critical
Publication of EP2331807B1 publication Critical patent/EP2331807B1/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
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0639—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature acting as a valve
    • 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
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • 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
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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

Definitions

  • the invention relates to a fuel injector, in particular a common rail injector, for injecting fuel into a combustion chamber of an internal combustion engine according to the preamble of claim 1 and to a method for surface treatment of an armature of a fuel injector according to the preamble of claim 8.
  • a trained as a common rail injector fuel injector known.
  • This includes a servo valve (control valve) for switching the actual injection valve element, which is adjustable between a closed position and the fuel flow through a nozzle hole arrangement releasing into the combustion chamber opening position.
  • an electromagnetic actuator is provided, which cooperates with an armature plate, which in turn is operatively connected to a control valve element.
  • the control valve connects a limited by the injection valve element control chamber with a low pressure region of the fuel injector, with the result that the injection valve element results in an opening direction acting hydraulic force.
  • the armature plate is provided with an armature surface facing the electromagnetic actuator, which is usually ground rotationally symmetrical. When rotationally symmetrical grinding occurs due to production to the formation of in the radial direction juxtaposed rotational grooves, which lead to a hydraulic bonding of the armature at the beginning of the closing process.
  • a fuel injector with an electromagnetic actuator and an armature surface facing the actuator is known, in which the armature surface has rotational grooves arranged in the circumferential direction. To complete the fluid from the recesses of the rotary grooves when tightening the armature drain holes are introduced in the wells.
  • WO 2002/084103 A1 known fuel injector is arranged between the armature surface and the magnetic core, an annular damping element which has transverse grooves on the armature surface facing the magnetic core.
  • the invention has for its object to propose a fuel injector, in which hydraulic adhesive effects at the beginning of the closing operation in the region of the armature, at least largely avoided. Furthermore, the surface of the armature should be reproducible. Furthermore, the object is to propose an alternative surface treatment method for the treatment of the surface of an anchor, with the hydraulic adhesive effects are avoided at the beginning of the closing process.
  • the invention is based on the idea, the rotating groove structure, resulting from a, preferably rotationally symmetric, grinding of the electromagnetic actuator in the mounted state resulting anchor surface, thereby interrupting or possibly even completely destroy that at least one angularly extending to the rotation grooves connecting groove is provided, which connects at least a portion of, preferably in the radial direction juxtaposed, circumferentially extending rotary grooves together to allow in this way a facilitated inflow of hydraulic fluid in an area axially between the armature surface and the actuator, with the aim of avoid hydraulic adhesive effects.
  • the at least one connecting groove preferably introduced by grinding into the armature, enables an accelerated inflow of fuel between the armature surface and a stop surface, preferably provided by the electromagnetic actuator, as a result of which hydraulic adhesive effects, at least largely, are prevented.
  • the at least one connecting groove particularly preferably has, at least approximately, the same dimensions as the rotational grooves formed by, in particular, rotationally symmetrical grinding.
  • a turning groove in the sense of the invention is understood as meaning a circumferentially extending groove which either completely revolves around a central point or which, in sections, in the case of the realization of several, preferably evenly distributed in the circumferential direction, the armature vanes may be interrupted by the gaps formed between the circumferentially juxtaposed armature vanes.
  • the at least one connecting groove is formed as a radial groove extending in the radial direction.
  • the at least one connecting groove, at least approximately, all turning grooves is formed interconnecting, that extends from a radially inner region to a radially outer region of the anchor surface.
  • connecting grooves are provided, but in which a plurality of, preferably evenly distributed in the circumferential direction, connecting grooves are realized, which very particularly preferably each extend in the radial direction.
  • a similar surface structure as in sand blasting can be realized, with the important difference that the surface structure is realized reproducible.
  • the anchor surface is provided with a Wienschliffober phenomenon, ie with a plurality of circumferentially extending, in the radial direction next to each other arranged rotational grooves, which are crossed by a plurality of radially extending connecting grooves.
  • the cross-cut surface is realized by honing, which is a machining fine machining method.
  • the armature is not directly operatively connected to an injection valve member which releases a nozzle hole arrangement in its open position (wherein such an embodiment is feasible), but acts directly adjusting to a control valve member of a control valve (servo valve), the armature being either integral with the control valve member or is firmly attached to it.
  • a control valve serving valve
  • control valve element is designed as a sleeve part, that has a central through hole, which is preferably closed axially by a pressure pin.
  • the pressure pin essentially only has the task to seal a formed within the control valve element, hydraulically connected to a control chamber valve chamber in the axial direction and support the hydraulic pressure forces axially upward.
  • the invention also leads to a method for the surface treatment of an armature of a fuel injector.
  • This is preferably the armature of a control valve (Servo Valve).
  • the method carried out according to the concept of the invention is characterized in that a plurality of rotational grooves arising in the circumferential direction are hydraulically connected to one another by means of at least one connecting groove extending at an angle to the rotational grooves, thus ensuring a faster inflow of fuel into the region between the Anchor surface and a stop surface to allow, so that hydraulic adhesive effects are avoided at the beginning of the closing process.
  • connection groove not only a single connection groove is provided, but a plurality of connecting grooves, wherein this is preferably achieved in that the anchor surface is provided with a cross-section, so with a plurality of circumferentially extending rotational grooves which are crossed at an angle to these extending connecting grooves, preferably at right angles.
  • Fig. 1 shows in a plan view of an anchor 1 (here anchor plate) for a later to be explained control valve of a fuel injector.
  • the armature 1 is integrally connected to a substantially hollow cylindrical, extending in the plane of the drawing control valve element 2.
  • Fig. 1 is the, in the assembled state an electromagnetic actuator facing, anchor surface 3 shown. It can be seen that the armature surface 3 is formed by three uniformly circumferentially spaced wing surfaces 4 and a central annular surface portion 5, which surrounds a central bore 6 radially outward.
  • the wing surfaces 4 are upper sides of vanes 7, which are distributed uniformly in the circumferential direction, with two vanes 7 arranged circumferentially next to one another being separated from one another by a radially widening radial gap 8 in the radial direction.
  • the radial gaps 8 allow fuel passage in the axial direction and thus prevent unwanted vibrations of the armature 1 during operation.
  • the armature surface 3 is designed as a cross-cut surface 9. This includes a plurality of circumferentially extending and in radial Direction of juxtaposed twist grooves 10, which are crossed at right angles, by a plurality of circumferentially spaced apart and extending in the radial direction of the connecting grooves 11.
  • the twisting groove structure is destroyed by the connecting grooves 11, so that one with elevations and valleys (grooves) gives a textured surface that facilitates penetration of fuel into a region between the anchor surface 3 and corresponding abutment surfaces, thereby avoiding hydraulic sticking effects at the beginning of the closing process.
  • Fig. 2 shows one with an in Fig. 1 12. More specifically, the armature 1 is part of a control valve 13 (servo valve) of the fuel injector 12, by means of which a control chamber 14 is hydraulically connectable to a low pressure region 15 of the fuel injector 12, which in turn is connected via a return connection, not shown, with a reservoir.
  • the control chamber 14 is bounded in the axial direction in the plane of the drawing down by an injection valve element 16, which moves in the axial direction in the plane of the drawing with the control valve 13 open and thus releases a nozzle hole arrangement, not shown, by the standing substantially under rail pressure fuel in can flow the combustion chamber of an internal combustion engine.
  • the control chamber 14 is hydraulically connected via an outlet throttle channel 17 with a valve chamber 18 formed inside the sleeve-shaped control valve element 2. From this, in the illustrated opening position of the control valve 13 fuel can flow into the low-pressure region 15 and via the return port, not shown. Out Fig. 2 It can also be seen that in the central bore 6 of the control valve element 2 a in the axial direction in the drawing plane upwardly supporting pressure pin 25 is received, which seals the valve chamber 18 in the axial direction upwards. At the same time the pressure pin 25 serves as a guide of the control valve element 2 in its axial opening and closing movement.
  • an electromagnetic actuator 22 is provided, which cooperates with the armature 1, such that upon energization of a magnetic coil 23 due to the magnetic forces an opening movement of the armature 1 and thus the control valve element 2 results.
  • the armature 1 is more accurate in the Fig. 1
  • Anchor surface 3 shown provided with a cross-grinding surface, which allows a fast fuel inlet from the radial direction in a region between the armature surface 3 and the contact surface 24 for the armature 1.

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Kraftstoff-Injektor, insbesondere einen Common-Rail-Injektor, zum Einspritzen von Kraftstoff in einen Brennraum einer Brennkraftmaschine gemäß dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zur Oberflächenbehandlung eines Ankers eines Kraftstoff-Injektors gemäß dem Oberbegriff des Anspruchs 8.The invention relates to a fuel injector, in particular a common rail injector, for injecting fuel into a combustion chamber of an internal combustion engine according to the preamble of claim 1 and to a method for surface treatment of an armature of a fuel injector according to the preamble of claim 8.

Aus der DE 10 2006 020 724 A1 ist ein als Common-Rail-Injektor ausgebildeter Kraftstoff-Injektor bekannt. Dieser umfasst ein Servoventil (Steuerventil) zum Schalten des eigentlichen Einspritzventilelementes, das zwischen einer Schließstellung und einer den Kraftstofffluss durch eine Düsenlochanordnung in den Brennraum freigebenden Öffnungsstellung verstellbar ist. Zum Öffnen des Steuerventils ist ein elektromagnetischer Aktuator vorgesehen, der mit einer Ankerplatte zusammenwirkt, welche wiederum mit einem Steuerventilelement wirkverbunden ist. In der Öffnungsstellung verbindet das Steuerventil einen von dem Einspritzventilelement begrenzten Steuerraum mit einem Niederdruckbereich des Kraftstoff-Injektors, mit der Folge, dass auf das Einspritzventilelement eine in Öffnungsrichtung wirkende hydraulische Kraft resultiert. Die Ankerplatte ist mit einer dem elektromagnetischen Aktuator zugewandten Ankerfläche versehen, die üblicherweise rotationssymmetrisch geschliffen ist. Beim rotationssymmetrischen Schleifen kommt es fertigungsbedingt zur Ausbildung von in radialer Richtung nebeneinander angeordneten Drehrillen, die zu einem hydraulischen Verkleben des Ankers zu Beginn des Schließprozesses führen.From the DE 10 2006 020 724 A1 is a trained as a common rail injector fuel injector known. This includes a servo valve (control valve) for switching the actual injection valve element, which is adjustable between a closed position and the fuel flow through a nozzle hole arrangement releasing into the combustion chamber opening position. To open the control valve, an electromagnetic actuator is provided, which cooperates with an armature plate, which in turn is operatively connected to a control valve element. In the open position, the control valve connects a limited by the injection valve element control chamber with a low pressure region of the fuel injector, with the result that the injection valve element results in an opening direction acting hydraulic force. The armature plate is provided with an armature surface facing the electromagnetic actuator, which is usually ground rotationally symmetrical. When rotationally symmetrical grinding occurs due to production to the formation of in the radial direction juxtaposed rotational grooves, which lead to a hydraulic bonding of the armature at the beginning of the closing process.

Aus WO 01/44652 A1 ist ein Kraftstoff-Injektor mit einem elektromagnetischen Aktutator und einer dem Aktuator zugewandten Ankerfläche bekannt, bei dem die Ankerfläche in Umfangsrichtung angeordnete Drehrillen aufweist. Zum Abschließen des Fluids aus den Vertiefungen der Drehrillen beim Anziehen des Ankers sind in den Vertiefungen Ablaufbohrungen eingebracht.Out WO 01/44652 A1 For example, a fuel injector with an electromagnetic actuator and an armature surface facing the actuator is known, in which the armature surface has rotational grooves arranged in the circumferential direction. To complete the fluid from the recesses of the rotary grooves when tightening the armature drain holes are introduced in the wells.

Bei einem aus WO 2002/084103 A1 bekannten Kraftstoff-Injektor ist zwischen Ankeroberfläche und Magnetkern ein ringförmiges Dämpfungselement angeordnet, das an der zum Magnetkern weisenden Ankerfläche Querrillen aufweist.At one off WO 2002/084103 A1 known fuel injector is arranged between the armature surface and the magnetic core, an annular damping element which has transverse grooves on the armature surface facing the magnetic core.

Um den Effekt des hydraulischen Verklebens zu minimieren, ist es zum Beispiel weiterhin bekannt geworden, die Ankerfläche sandzustrahlen, wobei sich hierbei als nachteilig herausgestellt hat, dass beim Sandstrahlen unkontrolliert Material abgetragen wird, was die Reproduzierbarkeit der Oberfläche schwierig macht.In order to minimize the effect of hydraulic bonding, for example, it has also been known to sandblast the anchor surface, which has proved to be disadvantageous in that sandblasting uncontrolled material is removed, which makes the reproducibility of the surface difficult.

Offenbarung der ErfindungDisclosure of the invention

Der Erfindung liegt die Aufgabe zugrunde, einen Kraftstoff-Injektor vorzuschlagen, bei dem hydraulische Klebeeffekte zu Beginn des Schließvorgangs im Bereich des Ankers, zumindest weitgehend, vermieden werden. Ferner soll die Oberfläche des Ankers reproduzierbar herstellbar sein. Weiterhin besteht die Aufgabe darin, ein alternatives Oberflächenbehandlungsverfahren zur Behandlung der Oberfläche eines Ankers vorzuschlagen, mit dem hydraulische Klebeeffekte zu Beginn des Schließprozesses vermieden werden.The invention has for its object to propose a fuel injector, in which hydraulic adhesive effects at the beginning of the closing operation in the region of the armature, at least largely avoided. Furthermore, the surface of the armature should be reproducible. Furthermore, the object is to propose an alternative surface treatment method for the treatment of the surface of an anchor, with the hydraulic adhesive effects are avoided at the beginning of the closing process.

Diese Aufgabe wird hinsichtlich des Kraftstoff-Injektors mit den Merkmalen des Anspruchs 1 und hinsichtlich des Oberflächenbehandlungsverfahrens mit den Merkmalen des Anspruchs 8 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben. In den Rahmen der Erfindung fallen sämtliche Kombinationen aus zumindest zwei von in der Beschreibung, den Ansprüchen und/oder den Figuren offenbarten Merkmalen. Zur Vermeidung von Wiederho lungen sollen vorrichtungsgemäß offenbarte Merkmale als verfahrensgemäß offenbart gelten und beanspruchbar sein. Ebenso sollen verfahrensgemäß offenbarte Merkmale als vorrichtungsgemäß offenbart gelten und beanspruchbar sein.This object is achieved with regard to the fuel injector having the features of claim 1 and with regard to the surface treatment method having the features of claim 8. Advantageous developments of the invention are specified in the subclaims. Fall within the scope of the invention all combinations of at least two features disclosed in the description, claims and / or figures. To avoid repetition tions should be considered to be disclosed according to the method and be claimable. Likewise, according to the method disclosed features should be considered as device disclosed and claimed claimable.

Der Erfindung liegt der Gedanke zugrunde, die Drehrillenstruktur, die aus einem, vorzugsweise rotationssymmetrischen, Schleifen der im montierten Zustand dem elektromagnetischen Aktuator zugewandten Ankerfläche resultiert, dadurch zu unterbrechen oder ggf. sogar vollständig zu zerstören, dass mindestens eine sich winklig zu den Drehrillen erstreckende Verbindungsrille vorgesehen wird, die zumindest einen Teil der, vorzugsweise in radialer Richtung nebeneinander angeordneten, sich in Umfangsrichtung erstreckenden Drehrillen miteinander verbindet, um auf diese Weise ein erleichtertes Einströmen von Hydraulikflüssigkeit in einen Bereich axial zwischen der Ankerfläche und dem Aktuator zu ermöglichen, mit dem Ziel, hydraulische Klebeeffekte zu vermeiden. Anders ausgedrückt ermöglicht die mindestens eine, vorzugsweise durch Schleifen in den Anker eingebrachte, Verbindungsrille ein beschleunigtes Zuströmen von Kraftstoff zwischen die Ankerfläche und eine, vorzugsweise von dem elektromagnetischen Aktuator bereitgestellte, Anschlagfläche, wodurch hydraulische Klebeeffekte, zumindest weitgehend, unterbunden werden. Besonders bevorzugt weist die mindestens eine Verbindungsrille im Hinblick auf die Rillentiefe und/oder die Rillenbreite, zumindest näherungsweise, die gleichen Dimensionen auf, wie die durch insbesondere rotationssymmetrisches Schleifen gebildeten Drehrillen. Unter einer Drehrille im Sinne der Erfindung wird eine sich in Umfangsrichtung erstreckende Rille verstanden, die entweder vollständig um einen Mittelpunkt umläuft, oder die abschnittsweise im Falle der Realisierung mehrerer, vorzugsweise gleichmäßig in Umfangsrichtung verteilt angeordneter, Ankerflügel von den zwischen den in Umfangsrichtung nebeneinander angeordneten Ankerflügeln gebildeten Spalten unterbrochen sein kann.The invention is based on the idea, the rotating groove structure, resulting from a, preferably rotationally symmetric, grinding of the electromagnetic actuator in the mounted state resulting anchor surface, thereby interrupting or possibly even completely destroy that at least one angularly extending to the rotation grooves connecting groove is provided, which connects at least a portion of, preferably in the radial direction juxtaposed, circumferentially extending rotary grooves together to allow in this way a facilitated inflow of hydraulic fluid in an area axially between the armature surface and the actuator, with the aim of avoid hydraulic adhesive effects. In other words, the at least one connecting groove, preferably introduced by grinding into the armature, enables an accelerated inflow of fuel between the armature surface and a stop surface, preferably provided by the electromagnetic actuator, as a result of which hydraulic adhesive effects, at least largely, are prevented. With particular regard to the groove depth and / or the groove width, the at least one connecting groove particularly preferably has, at least approximately, the same dimensions as the rotational grooves formed by, in particular, rotationally symmetrical grinding. A turning groove in the sense of the invention is understood as meaning a circumferentially extending groove which either completely revolves around a central point or which, in sections, in the case of the realization of several, preferably evenly distributed in the circumferential direction, the armature vanes may be interrupted by the gaps formed between the circumferentially juxtaposed armature vanes.

Im Hinblick auf die Gestaltung des zwischen der mindestens einen Verbindungsrille und den sich in Umfangsrichtung erstreckenden Drehrillen gebildeten Winkels gibt es unterschiedliche Möglichkeiten. Besonders bevorzugt ist eine Ausführungsform, bei der die mindestens eine Verbindungsrille als sich in radialer Richtung erstreckende Radialrille ausgebildet ist.With regard to the design of the angle formed between the at least one connecting groove and the circumferentially extending rotating grooves, there are different possibilities. Particularly preferred is an embodiment in which the at least one connecting groove is formed as a radial groove extending in the radial direction.

Besonders bevorzugt ist eine Ausführungsform, bei der die mindestens eine Verbindungsrille, zumindest näherungsweise, sämtliche Drehrillen miteinander verbindend ausgebildet ist, also sich von einem radial inneren Bereich bis zu einem radial äußeren Bereich der Ankerfläche erstreckt.Particularly preferred is an embodiment in which the at least one connecting groove, at least approximately, all turning grooves is formed interconnecting, that extends from a radially inner region to a radially outer region of the anchor surface.

Ganz besonders bevorzugt ist eine Ausführungsform, bei der nicht nur eine oder einige wenige Verbindungsrillen vorgesehen sind, sondern bei der eine Vielzahl von, vorzugsweise gleichmäßig in Umfangsrichtung verteilt angeordneten, Verbindungsrillen realisiert sind, die ganz besonders bevorzugt jeweils in radialer Richtung verlaufen. Hierdurch kann eine ähnliche Oberflächenstruktur wie beim Sandstrahlen realisiert werden, mit dem wichtigen Unterschied, dass die Oberflächenstruktur reproduzierbar realisiert wird.Especially preferred is an embodiment in which not only one or a few connecting grooves are provided, but in which a plurality of, preferably evenly distributed in the circumferential direction, connecting grooves are realized, which very particularly preferably each extend in the radial direction. In this way, a similar surface structure as in sand blasting can be realized, with the important difference that the surface structure is realized reproducible.

In Weiterbildung der Erfindung ist mit Vorteil vorgesehen, dass die Ankerfläche mit einer Kreuzschliffoberfläche versehen wird, also mit einer Vielzahl von sich in Umfangsrichtung erstreckenden, in radialer Richtung nebeneinander angeordneten Drehrillen, die von einer Vielzahl von in radialer Richtung verlaufenden Verbindungsrillen gekreuzt werden. Bevorzugt wird die Kreuzschliffoberfläche durch Honen realisiert, bei welchem es sich um ein zerspanendes Feinbearbeitungsverfahren handelt.In a further development of the invention is advantageously provided that the anchor surface is provided with a Kreuzschliffoberfläche, ie with a plurality of circumferentially extending, in the radial direction next to each other arranged rotational grooves, which are crossed by a plurality of radially extending connecting grooves. Preferably, the cross-cut surface is realized by honing, which is a machining fine machining method.

Bevorzugt ist der Anker nicht unmittelbar mit einem Einspritzventilelement wirkverbunden, welches in seiner Öffnungsstellung eine Düsenlochanordnung freigibt (wobei auch eine derartige Ausführungsform realisierbar ist), sondern wirkt unmittelbar verstellend auf ein Steuerventilelement eines Steuerventils (Servoventil), wobei der Anker entweder einstückig mit dem Steuerventilelement verbunden oder fest mit diesem verbunden ist. Durch das Vorsehen eines Steuerventils (Servoventil) können wesentlich höhere Drücke als bei einer direkten Ansteuerung des Einspritzventilelementes geschaltet werden.Preferably, the armature is not directly operatively connected to an injection valve member which releases a nozzle hole arrangement in its open position (wherein such an embodiment is feasible), but acts directly adjusting to a control valve member of a control valve (servo valve), the armature being either integral with the control valve member or is firmly attached to it. By providing a control valve (servo valve) much higher pressures than in a direct control of the injection valve element can be switched.

In Weiterbildung der Erfindung ist mit Vorteil vorgesehen, dass das Steuerventilelement als Hülsenteil ausgebildet ist, also eine zentrische Durchgangsbohrung aufweist, die vorzugsweise axial von einem Druckstift verschlossen wird. Auf diese Weise lassen sich im geschlossenen Zustand in axialer Richtung druckausgeglichene Steuerventile realisieren, wobei dem Druckstift im Wesentlichen nur die Aufgabe zukommt, eine innerhalb des Steuerventilelementes ausgebildete, hydraulisch mit einer Steuerkammer verbundene Ventilkammer in axialer Richtung abzudichten und die hydraulischen Druckkräfte nach axial oben abzustützen.In a further development of the invention is advantageously provided that the control valve element is designed as a sleeve part, that has a central through hole, which is preferably closed axially by a pressure pin. In this way, in the closed state in the axial direction pressure balanced control valves realize, the pressure pin essentially only has the task to seal a formed within the control valve element, hydraulically connected to a control chamber valve chamber in the axial direction and support the hydraulic pressure forces axially upward.

Die Erfindung führt auch auf ein Verfahren zur Oberflächenbehandlung eines Ankers eines Kraftstoff-Injektors. Bevorzugt handelt es sich dabei um den Anker eines Steuerventils (Servoventil). Das nach dem Konzept der Erfindung ausgeführte Verfahren zeichnet sich dadurch aus, dass mehrere, sich in Umfangsrichtung, durch Schleifen entstehende Drehrillen mittels mindestens einer winklig zu den Drehrillen verlaufenden Verbindungsrille miteinander hydraulisch verbunden werden, um somit ein schnelleres Einströmen von Kraftstoff in den Bereich zwischen der Ankerfläche und einer Anschlagfläche zu ermöglichen, wodurch hydraulische Klebeeffekte zu Beginn des Schließvorgangs vermieden werden.The invention also leads to a method for the surface treatment of an armature of a fuel injector. This is preferably the armature of a control valve (Servo Valve). The method carried out according to the concept of the invention is characterized in that a plurality of rotational grooves arising in the circumferential direction are hydraulically connected to one another by means of at least one connecting groove extending at an angle to the rotational grooves, thus ensuring a faster inflow of fuel into the region between the Anchor surface and a stop surface to allow, so that hydraulic adhesive effects are avoided at the beginning of the closing process.

Besonders bevorzugt ist eine Ausführungsform des Verfahrens, bei der nicht nur eine einzige Verbindungsrille vorgesehen wird, sondern eine Vielzahl von Verbindungsrillen, wobei dies vorzugsweise dadurch erreicht wird, dass die Ankerfläche mit einem Kreuzschliff versehen wird, also mit einer Vielzahl von sich in Umfangsrichtung erstreckenden Drehrillen, die von winklig zu diesen verlaufenden Verbindungsrillen, vorzugsweise rechtwinklig, gekreuzt werden.Particularly preferred is an embodiment of the method, in which not only a single connection groove is provided, but a plurality of connecting grooves, wherein this is preferably achieved in that the anchor surface is provided with a cross-section, so with a plurality of circumferentially extending rotational grooves which are crossed at an angle to these extending connecting grooves, preferably at right angles.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnungen. Diese zeigen in:

Fig. 1
eine Ankerfläche eines Ankers für einen Kraftstoff-Injektor in einer Draufsicht, und
Fig. 2
eine schematische, geschnittene Teilansicht eines als Common-Rail-Injektor ausgebildeten Kraftstoff-Injektors mit einem in Fig. 1 gezeigten Anker.
Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings. These show in:
Fig. 1
an anchor surface of an armature for a fuel injector in a plan view, and
Fig. 2
a schematic, partial sectional view of a designed as a common rail injector fuel injector with an in Fig. 1 shown anchor.

Ausführungsformen der ErfindungEmbodiments of the invention

In den Figuren sind gleiche Elemente und Elemente mit der gleichen Funktion mit den gleichen Bezugszeichen gekennzeichnet.In the figures, like elements and elements having the same function are denoted by the same reference numerals.

Fig. 1 zeigt in einer Draufsicht einen Anker 1 (hier Ankerplatte) für ein später noch zu erläuterndes Steuerventil eines Kraftstoff-Injektors. Der Anker 1 ist einteilig mit einem im Wesentlichen hohlzylindrischen, sich in die Zeichnungsebene hinein erstreckenden Steuerventilelement 2 verbunden. In Fig. 1 ist die, im montierten Zustand einem elektromagnetischen Aktuator zugewandte, Ankerfläche 3 gezeigt. Zu erkennen ist, dass die Ankerfläche 3 gebildet ist von drei gleichmäßig in Umfangsrichtung beabstandeten Flügelflächen 4 und einem zentrischen Ringflächenabschnitt 5, der eine zentrische Bohrung 6 radial außen umgibt. Die Flügelflächen 4 sind dabei Oberseiten von gleichmäßig in Umfangsrichtung verteilt angeordneten Flügeln 7, wobei jeweils zwei in Umfangsrichtung nebeneinander angeordnete Flügel 7 durch einen sich in radialer Richtung konisch erweiternden Radialspalt 8 voneinander getrennt sind. Die Radialspalte 8 ermöglichen einen Kraftstoffdurchtritt in axialer Richtung und verhindern somit ungewollte Schwingungen des Ankers 1 während des Betriebs. Fig. 1 shows in a plan view of an anchor 1 (here anchor plate) for a later to be explained control valve of a fuel injector. The armature 1 is integrally connected to a substantially hollow cylindrical, extending in the plane of the drawing control valve element 2. In Fig. 1 is the, in the assembled state an electromagnetic actuator facing, anchor surface 3 shown. It can be seen that the armature surface 3 is formed by three uniformly circumferentially spaced wing surfaces 4 and a central annular surface portion 5, which surrounds a central bore 6 radially outward. In this case, the wing surfaces 4 are upper sides of vanes 7, which are distributed uniformly in the circumferential direction, with two vanes 7 arranged circumferentially next to one another being separated from one another by a radially widening radial gap 8 in the radial direction. The radial gaps 8 allow fuel passage in the axial direction and thus prevent unwanted vibrations of the armature 1 during operation.

Zu erkennen ist, dass die Ankerfläche 3 als Kreuzschliffoberfläche 9 ausgebildet ist. Diese umfasst eine Vielzahl von sich in Umfangsrichtung erstreckenden und in radialer Richtung nebeneinander angeordneten Drehrillen 10, die rechtwinklig gekreuzt sind, von einer Vielzahl von in Umfangsrichtung voneinander beabstandeten und sich in radialer Richtung erstreckenden Verbindungsrillen 11. Anders ausgedrückt wird die Drehrillenstruktur von den Verbindungsrillen 11 zerstört, so dass sich eine mit Erhebungen und Tälern (Rillen) strukturierte Oberfläche ergibt, die ein Eindringen von Kraftstoff in einen Bereich zwischen der Ankerfläche 3 und entsprechenden Anlageflächen erleichtert, wodurch hydraulische Klebeeffekte zu Beginn des Schließprozesses vermieden werden.It can be seen that the armature surface 3 is designed as a cross-cut surface 9. This includes a plurality of circumferentially extending and in radial Direction of juxtaposed twist grooves 10, which are crossed at right angles, by a plurality of circumferentially spaced apart and extending in the radial direction of the connecting grooves 11. In other words, the twisting groove structure is destroyed by the connecting grooves 11, so that one with elevations and valleys (grooves) gives a textured surface that facilitates penetration of fuel into a region between the anchor surface 3 and corresponding abutment surfaces, thereby avoiding hydraulic sticking effects at the beginning of the closing process.

Fig. 2 zeigt einen mit einem in Fig. 1 dargestellten Anker 1 ausgestatteten Kraftstoff-Injektor 12. Genauer ausgedrückt, ist der Anker 1 Bestandteil eines Steuerventils 13 (Servoventil) des Kraftstoff-Injektors 12, mit Hilfe dessen eine Steuerkammer 14 hydraulisch mit einem Niederdruckbereich 15 des Kraftstoff-Injektors 12 verbindbar ist, der wiederum über einen nicht dargestellten Rücklaufanschluss mit einem Vorratsbehälter verbunden ist. Die Steuerkammer 14 wird in axialer Richtung in der Zeichnungsebene nach unten begrenzt von einem Einspritzventilelement 16, welches sich bei geöffnetem Steuerventil 13 in axialer Richtung in der Zeichnungsebene nach oben bewegt und somit eine nicht dargestellte Düsenlochanordnung freigibt, durch die im Wesentlichen unter Raildruck stehender Kraftstoff in den Brennraum einer Brennkraftmaschine strömen kann. Die Steuerkammer 14 ist über einen Ablaufdrosselkanal 17 mit einer innerhalb des hülsenförmigen Steuerventilelementes 2 ausgebildeten Ventilkammer 18 hydraulisch verbunden. Aus dieser kann in der dargestellten Öffnungsposition des Steuerventils 13 Kraftstoff in den Niederdruckbereich 15 und über den nicht gezeigten Rücklaufanschluss abströmen. Aus Fig. 2 ist weiter zu entnehmen, dass in der zentrischen Bohrung 6 des Steuerventilelementes 2 ein sich in axialer Richtung in der Zeichnungsebene nach oben abstützender Druckstift 25 aufgenommen ist, der die Ventilkammer 18 in axialer Richtung nach oben abdichtet. Gleichzeitig dient der Druckstift 25 als Führung des Steuerventilelementes 2 bei seiner axialen Öffnungs- und Schließbewegung. Fig. 2 shows one with an in Fig. 1 12. More specifically, the armature 1 is part of a control valve 13 (servo valve) of the fuel injector 12, by means of which a control chamber 14 is hydraulically connectable to a low pressure region 15 of the fuel injector 12, which in turn is connected via a return connection, not shown, with a reservoir. The control chamber 14 is bounded in the axial direction in the plane of the drawing down by an injection valve element 16, which moves in the axial direction in the plane of the drawing with the control valve 13 open and thus releases a nozzle hole arrangement, not shown, by the standing substantially under rail pressure fuel in can flow the combustion chamber of an internal combustion engine. The control chamber 14 is hydraulically connected via an outlet throttle channel 17 with a valve chamber 18 formed inside the sleeve-shaped control valve element 2. From this, in the illustrated opening position of the control valve 13 fuel can flow into the low-pressure region 15 and via the return port, not shown. Out Fig. 2 It can also be seen that in the central bore 6 of the control valve element 2 a in the axial direction in the drawing plane upwardly supporting pressure pin 25 is received, which seals the valve chamber 18 in the axial direction upwards. At the same time the pressure pin 25 serves as a guide of the control valve element 2 in its axial opening and closing movement.

Über einen Zulaufdrosselkanal 19 strömt ständig unter Hochdruck stehender Kraftstoff aus einem Druckraum 20 in die Steuerkammer 14 nach, wobei die Durchflussquerschnitte des Zulaufdrosselkanals 19 und des Ablaufdrosselkanals 17 derart aufeinander abgestimmt sind, dass bei geöffnetem Steuerventil 13 ein Nettoabfluss von Kraftstoff resultiert, mit der Folge, dass das Einspritzventilelement 16 von seinem Einspritzventilelementsitz (nicht gezeigt) abhebt. Zum Beenden des Einspritzvorgangs wird das Steuerventilelement 2 mittels einer Schließfeder 21 in axialer Richtung nach unten bewegt und verschließt somit den Ablaufdrosselkanal 17. Der durch den Zulaufdrosselkanal 19 weiter in die Steuerkammer 14 zuströmende Kraftstoff sorgt für einen rapiden Druckanstieg in der Steuerkammer 14 und in der Folge für eine Schließbewegung des Einspritzventilelementes 16.Via an inlet throttle channel 19, high-pressure fuel constantly flows from a pressure chamber 20 into the control chamber 14, wherein the flow cross-sections of the inlet throttle channel 19 and the outlet throttle channel 17 are matched to one another such that when the control valve 13 is open, a net outflow of fuel results, with the result that the injection valve element 16 lifts off from its injection valve element seat (not shown). To terminate the injection process, the control valve element 2 is moved by means of a closing spring 21 in the axial direction downwards and thus closes the outlet throttle passage 17. The fuel flowing in through the inlet throttle passage 19 further into the control chamber 14 provides for a rapid increase in pressure in the control chamber 14 and in the sequence for a closing movement of the injection valve element 16.

Zum Öffnen des Steuerventilelementes 2 ist ein elektromagnetischer Aktuator 22 vorgesehen, der mit dem Anker 1 zusammenwirkt, derart, dass bei Bestromung einer Magnetspule 23 aufgrund der magnetischen Kräfte eine Öffnungsbewegung des Ankers 1 und damit des Steuerventilelementes 2 resultiert.To open the control valve element 2, an electromagnetic actuator 22 is provided, which cooperates with the armature 1, such that upon energization of a magnetic coil 23 due to the magnetic forces an opening movement of the armature 1 and thus the control valve element 2 results.

Um ein hydraulisches Kleben des Ankers 1 in seiner Öffnungsstellung zu vermeiden, ist der Anker 1, genauer ist die in Fig. 1 gezeigte Ankerfläche 3 mit einer Kreuzschliffoberfläche versehen, die einen schnellen Kraftstoffeintritt aus radialer Richtung in einen Bereich zwischen der Ankerfläche 3 und der Anlagefläche 24 für den Anker 1 ermöglicht.In order to avoid hydraulic sticking of the armature 1 in its open position, the armature 1 is more accurate in the Fig. 1 Anchor surface 3 shown provided with a cross-grinding surface, which allows a fast fuel inlet from the radial direction in a region between the armature surface 3 and the contact surface 24 for the armature 1.

Claims (9)

  1. Fuel injector, in particular common rail injector, for injecting fuel into a combustion chamber of an internal combustion engine, having at least one electromagnetic actuator (22) for adjusting an armature (1), wherein the armature (1) has an armature surface (3) which faces towards the actuator (22), extends in a circumferential direction and is provided with rotational channels (10) arranged in a radial direction, characterized in that at least one connecting channel (11) which interconnects at least some of the rotational channels (10) is formed into the armature surface (3).
  2. Fuel injector according to Claim 1,
    characterized
    in that the connecting channel (11) is formed as a radial channel extending in a radial direction.
  3. Fuel injector according to either of Claims 1 and 2,
    characterized
    in that the connecting channel (11) is at least approximately formed and arranged so as to interconnect all rotational channels (10) arranged radially adjacent to one another.
  4. Fuel injector according to one of the preceding claims,
    characterized
    in that multiple connecting channels (11) are provided which are preferably arranged so as to be distributed uniformly in a circumferential direction.
  5. Fuel injector according to one of the preceding claims,
    characterized
    in that the armature surface (3) has a cross-ground surface (9).
  6. Fuel injector according to Claim 5,
    characterized
    in that the armature (1) is formed in one piece with or fixedly connected to a control valve element (2) of a control valve (13).
  7. Fuel injector according to Claim 6,
    characterized
    in that the control valve element (2) has a central through bore in which a pressure pin (25) is preferably accommodated.
  8. Method for the surface treatment of an armature (1) of a fuel injector (12), wherein an armature surface (3), which in an assembled state faces towards an electromagnetic actuator (22), is ground in such a way that a plurality of manufacture-induced rotational channels (10) extending in a circumferential direction are formed, characterized in that at least one connecting channel (11) which interconnects at least some of the rotational channels (10) is formed into the armature surface (3).
  9. Method according to Claim 8,
    characterized
    in that the armature surface (3) is cross-ground.
EP09781758.9A 2008-10-02 2009-08-12 Fuel injector and surface treatment method Active EP2331807B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810042593 DE102008042593A1 (en) 2008-10-02 2008-10-02 Fuel injector and surface treatment methods
PCT/EP2009/060445 WO2010037590A1 (en) 2008-10-02 2009-08-12 Fuel injector, and surface treatment method

Publications (2)

Publication Number Publication Date
EP2331807A1 EP2331807A1 (en) 2011-06-15
EP2331807B1 true EP2331807B1 (en) 2013-06-19

Family

ID=41351553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09781758.9A Active EP2331807B1 (en) 2008-10-02 2009-08-12 Fuel injector and surface treatment method

Country Status (4)

Country Link
EP (1) EP2331807B1 (en)
CN (1) CN102171438B (en)
DE (1) DE102008042593A1 (en)
WO (1) WO2010037590A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012205365A1 (en) 2012-04-02 2013-10-02 Robert Bosch Gmbh Arrangement for forming magnetic valve for operating fuel injector, has anchor whose upper surface facing toward anchor abutment surface includes groove with defined groove width and depth in over-covering area with anchor abutment surface

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4978074A (en) * 1989-06-21 1990-12-18 General Motors Corporation Solenoid actuated valve assembly
DE19523915A1 (en) * 1995-06-30 1997-01-02 Bosch Gmbh Robert Microvalve and method for manufacturing a microvalve
DE19960605A1 (en) * 1999-12-16 2001-07-19 Bosch Gmbh Robert Fuel injector
DE10118161B9 (en) * 2001-04-11 2004-09-09 Robert Bosch Gmbh Fuel injector
DE10256662A1 (en) * 2002-12-04 2004-06-17 Robert Bosch Gmbh Fuel injector
DE102006020724A1 (en) 2006-05-04 2007-11-08 Robert Bosch Gmbh Solenoid valve with self-centering anchor bolt

Also Published As

Publication number Publication date
EP2331807A1 (en) 2011-06-15
CN102171438B (en) 2014-05-07
DE102008042593A1 (en) 2010-04-08
CN102171438A (en) 2011-08-31
WO2010037590A1 (en) 2010-04-08

Similar Documents

Publication Publication Date Title
EP2235354B1 (en) Fuel injector the control valve element of which comprises a support region
EP2171257B1 (en) Control valve for a fuel injector and fuel injector
DE102012010614B4 (en) injector
EP2235356B1 (en) Fuel injector
EP2235355B1 (en) Fuel injector
EP2331807B1 (en) Fuel injector and surface treatment method
EP2156045B1 (en) Injector
EP2276922B1 (en) Fuel injector with solenoid valve
DE102008001913A1 (en) Fuel injector
EP2156044B1 (en) Injector having a pressure-compensated control valve
DE102006050045A1 (en) Injector for injecting fuel into combustion chamber of internal-combustion engine, has bolt that is supported and fixed in axial direction by control chamber away to injector component
EP3622170A1 (en) Valve for metering a fluid
EP2933380B1 (en) Injection head for a high pressure injection of suspension into a base
DE102008005535A1 (en) Injector, particularly common rail injector, for injecting fuel into combustion chamber of internal combustion engine, has injection valve element which is adjustable between closing position and opening position
WO2008125537A1 (en) Injector
EP3775527B1 (en) Injector for injecting fuel
DE102005057748A1 (en) Nozzle assembly for use in fuel injecting valve, has two sets of injecting holes gradually supplying fluid, and provided in downstream of seat region and respective outside or inside of tubular elevation
EP1961949A2 (en) Injector with additional servo-valve
EP2016276B1 (en) Fuel-injector with optimised return pipe
WO2004070191A1 (en) Fuel-injection device, in particular for internal combustion engines with direct fuel-injection
DE102016000350A1 (en) fuel injector
EP2726731B1 (en) Fuel injector
WO2008049675A1 (en) Injector with an axial pressure-compensating control valve
CH717897B1 (en) Valve device for controlled passage of a medium, particularly in the high-pressure range.
EP2085604A1 (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: 20110502

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): 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 SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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): 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 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: 617799

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130715

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: 502009007402

Country of ref document: DE

Effective date: 20130814

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: 20130619

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: 20130919

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: 20130619

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: 20130619

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: 20130619

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: 20130930

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: 20130920

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

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

Ref country code: BG

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

Effective date: 20130919

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: 20130619

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20130619

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

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: 20130619

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: 20130619

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: 20130717

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: 20131019

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: 20130619

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: 20131021

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: 20130619

BERE Be: lapsed

Owner name: ROBERT BOSCH G.M.B.H.

Effective date: 20130831

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: 20130619

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: 20130619

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: 20130619

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: 20130619

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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: LI

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

Effective date: 20130831

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: 20130619

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: 20130619

Ref country code: CH

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

Effective date: 20130831

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

26N No opposition filed

Effective date: 20140320

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

Effective date: 20130919

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: 20130831

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502009007402

Country of ref document: DE

Effective date: 20140320

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: 20130919

Ref country code: IE

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

Effective date: 20130812

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

Ref country code: SM

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

Effective date: 20130619

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: 20130619

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: 20130619

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: 20130619

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: 20090812

Ref country code: LU

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

Effective date: 20130812

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 617799

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140812

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: 20140812

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 8

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

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

Ref country code: IT

Payment date: 20230831

Year of fee payment: 15

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

Ref country code: FR

Payment date: 20230821

Year of fee payment: 15

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

Ref country code: DE

Payment date: 20231025

Year of fee payment: 15