EP1711707B1 - Injecteur de carburant dote d'un element de soupape d'injection a commande directe - Google Patents

Injecteur de carburant dote d'un element de soupape d'injection a commande directe Download PDF

Info

Publication number
EP1711707B1
EP1711707B1 EP04821076A EP04821076A EP1711707B1 EP 1711707 B1 EP1711707 B1 EP 1711707B1 EP 04821076 A EP04821076 A EP 04821076A EP 04821076 A EP04821076 A EP 04821076A EP 1711707 B1 EP1711707 B1 EP 1711707B1
Authority
EP
European Patent Office
Prior art keywords
piezoelectric actuator
fuel
fuel injector
injection valve
actuator
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.)
Expired - Fee Related
Application number
EP04821076A
Other languages
German (de)
English (en)
Other versions
EP1711707A1 (fr
Inventor
Friedrich Boecking
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 EP1711707A1 publication Critical patent/EP1711707A1/fr
Application granted granted Critical
Publication of EP1711707B1 publication Critical patent/EP1711707B1/fr
Expired - Fee Related 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
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic

Definitions

  • Common Rail In self-igniting internal combustion engines today, in addition to other injection systems and the accumulator injection system “Common Rail” is used.
  • the essential feature of the common rail system is that the injection pressure can be generated independently of the engine speed and the injection quantity.
  • the decoupling of pressure generation and injection takes place with the aid of a storage volume.
  • This volume which determines the function, consists of components in the common rail in the high-pressure lines and in the injector itself.
  • Fuel injectors via which fuel is injected into the combustion chamber of an internal combustion engine, can be actuated via fast-switching solenoid valves or via piezo actuators.
  • a piezoelectric actuator or a solenoid valve acts on a closing element which closes or releases a discharge channel of a control chamber.
  • an injection valve member such as a nozzle needle.
  • a control volume flows out of the control chamber via a line containing an outlet throttle, so that the control chamber is pressure-relieved. This ensures that the end face of the injection valve member enters the control chamber and releases its combustion chamber side seat so that fuel is injected into the combustion chamber of the self-igniting internal combustion engine via the injection openings formed there in a nozzle body.
  • the actuation of the injection valve member takes place indirectly via a pressure relief of the control chamber, which causes the opening or closing of the needle-shaped injection valve member.
  • piezo actuators are used instead of fast-switching solenoid valves, the piezoelectric actuator is embedded in a high-pressure fuel volume for reasons of space.
  • the fuel volume typically has system pressure, i. the pressure level prevailing in the high-pressure storage space (common rail) of the fuel injection system.
  • Piezo actuators are generally constructed as layered piezocrystal stacks, which change their length when the piezoelectric actuator is energized. If piezoelectric actuators are arranged within a fuel volume, unwanted resultant forces on the piezoactuator arise due to the design of the piezoactuators upon application of a fuel volume. These direct forces influence the stroke within the injector body, in particular at high rotational speeds, in the case of direct activation of the injection valve member, so that the injection times or the quantities of fuel injected into the combustion chamber drift, i. are very inaccurate reproducible.
  • a fuel injector with an injection valve member directly actuated piezoelectric actuator is from the post-published document EP 1 382 838 A2 known.
  • the piezoelectric actuator is encapsulated in a housing, which in turn is arranged in a cavity in the injector.
  • the cavity of the injector housing is filled with fuel.
  • the movable Akorkolben is surrounded by a membrane, so that the piezoelectric actuator is protected within the housing from the fuel.
  • Another fuel injector with an injection valve member directly actuated piezoelectric actuator is off EP 218 895 A1 known.
  • the piezoelectric actuator is arranged in a cavity in the injector, which is filled with a standing under injection pressure fuel volume. As a result, the piezoelectric actuator is exposed directly to the fuel in the injector housing.
  • a membrane arranged which seals the piezoelectric actuator at the Aktorfuß Scheme and separates the fuel-loaded cavity from a damping chamber.
  • a solution is proposed in which a direct control of the injection valve member by a piezoelectric actuator is possible.
  • the proposed solution according to the invention is characterized in that the piezoelectric actuator, which is surrounded by fuel, is designed so that the foot of the arranged in the fuel volume piezoelectric actuator and a directly actuated by the head portion of the piezoelectric actuator booster piston, which is part of the injection valve member, same diameter exhibit.
  • the piezoelectric actuator surrounded by fuel under high pressure within the injector body has a sealing edge in the head region, wherein the sealing edge diameter is preferably identical to the diameter of the booster piston directly connected to the piezoactuator head region.
  • FIG. 1 a fuel injector 1 is shown, which is actuated by means of a piezoelectric actuator 2.
  • the piezoelectric actuator 2 is accommodated within a fuel volume 5.
  • the fuel volume 5 is located within a cavity 4 formed in the injector body 27 of the fuel injector 1.
  • the cavity 4 is acted upon by the fuel volume 5 via a high-pressure inlet 3.
  • the high-pressure inlet 3 in turn is in fluid communication with a in FIG. 1 not shown storage volume (common rail).
  • the storage volume is maintained by a high-pressure fuel pump system pressure level of about 1300 bar and more.
  • piezoelectric actuator 2 comprises an actuator base 6 and an actuator head 12th
  • the piezoelectric actuator 2 contains a number of stacked piezocrystals stacked one above the other, which change their extent when the piezoactuator 2 is energized via electrical connections 10, so that the piezoactuator 2 effects a lifting movement of a booster piston 5 directly connected thereto.
  • a metallic threaded part 8 In the upper region of the piezoelectric actuator 2, this is sealed on the actuator base 6 by a metallic threaded part 8. Below the metallic thread part 8 is a sealing edge 9, which is formed in the sealing edge diameter 17 (d 2 ). The formed on the piezoelectric actuator 2 sealing edge 9 abuts against a corresponding tapered conical surface of the injector 27 of the fuel injector 1.
  • the in FIG. 1 not shown piezocrystal stack may optionally be surrounded by a potting material 11 in order to improve the resistance of the piezoelectric actuator 2 to fuel.
  • the piezoelectric actuator in the actuator head region 12 has a constriction 13.
  • the hydraulic coupling space 19 is delimited by an end face 21 of a needle-shaped injection valve member 20.
  • the diameter of the end face 18 corresponds to the diameter of the booster piston 16 and is dimensioned larger than the diameter of the end face 21 of the injector body 27 movably received in the injector body 27 in a needle-shaped injection valve member 20.
  • the injection valve member 20 is received in a guide length 28 in the injector body 27.
  • a nozzle chamber inlet 22 branches off. Via the nozzle chamber inlet 22, fuel under system pressure flows toward a nozzle chamber 23 formed in the injector body 27.
  • a pressure stage 24 is formed, at which the flowing into the nozzle chamber 23, fuel pressure under system pressure attacks and the injection valve member 20 generates at the pressure stage 24, the injection valve member 20 in the opening direction actuating force. From the nozzle chamber 23 extends beyond an annular gap 25, via which fuel flows in the direction of a tip 26 of the injector valve 20 which can be formed as a nozzle needle.
  • the injection openings, via which fuel flows into a combustion chamber of a self-igniting internal combustion engine, are in FIG. 1 not shown in detail.
  • FIG. 2 The representation according to FIG. 2 is formed on the Aktorfuß Scheme 6, cooperating with the injector housing sealing edge reproduced in an enlarged view.
  • the intensifier piston 15 fixedly connected thereto moves into the hydraulic coupling space 19 with its end face 18, so that the needle-shaped injection valve member 20 is moved into its combustion chamber-side seat, so that the injection openings remain closed in the combustion chamber of a self-igniting internal combustion engine.
  • the booster piston 15 moves out of the hydraulic coupling chamber 19 due to the lack of elongation of the piezocrystal stack containing the piezoactuator 2, so that the end face 21 of the needle-shaped injection valve member 20 moves in the opening direction and fuel from the nozzle chamber 23 via the annular gap 25 to the tip 26 of the needle-shaped injection valve member 20 flows and over the in FIG. 1 injection openings, not shown, can be injected into the combustion chamber of the self-igniting internal combustion engine.

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)

Claims (8)

  1. Injecteur de carburant (1) comportant un actionneur piézo-électrique (2) commandant directement un organe de soupape d'injection (20), cet actionneur agissant sur un piston démultiplicateur (15) et la face frontale (18) du piston démultiplicateur (15) agit sur une chambre de couplage hydraulique (19) pour actionner l'organe de soupape d'injection (20) et l'actionneur piézo-électrique (2) est logé dans une cavité (4) du boîtier d'injecteur (27), cette cavité étant remplie d'un volume de carburant (5) mis à pression élevée de façon que l'actionneur piézo-électrique (2) soit entouré par du carburant,
    caractérisé en ce que
    l'actionneur piézo-électrique (2) comporte une arête d'étanchéité (9) dans une zone de base d'actionneur (6), cette arête coopérant avec un siège d'étanchéité en forme de tronc de cône réalisé sur le boîtier d'injecteur (27) et
    le diamètre (17) (d2) de l'arête d'étanchéité (9) dans la zone de base (6) de l'actionneur correspond au diamètre (16) (d1) du piston démultiplicateur (15).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la zone de tête (12) de l'actionneur piézo-électrique (2) est reliée solidairement au piston démultiplicateur (15).
  3. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la face frontale (18) du piston démultiplicateur (15) qui sollicite la chambre de couplage hydraulique (18) a une surface hydrauliquement efficace plus grande que la face frontale (21) de l'organe de soupape d'injection (20) délimitant la chambre de couplage hydraulique (19).
  4. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'actionneur piézo-électrique (2) est enveloppé par une matière coulée (11).
  5. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la cavité (4) qui entoure l'actionneur piézo-électrique (2) dans le boîtier d'injecteur (27) sollicite une alimentation de buse (22) s'étendant jusque dans une chambre de buse (23).
  6. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    les branchements électriques (10) pour l'alimentation de l'actionneur piézo-électrique (12) traversent un segment fileté (8) prévu au-dessus de la zone de base (6) de l'actionneur.
  7. Injecteur de carburant selon la revendication 1,
    caractérisé en ce qu'
    une arête d'étanchéité (9) réalisée dans la zone de base (6) de l'actionneur piézo-électrique (2), coopérant avec le segment de boîtier incliné du boîtier d'injecteur (27), assure l'étanchéité de la cavité (4) remplie du volume de carburant (5) à pression élevée, par rapport au segment fileté (8).
  8. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'actionneur piézo-électrique (2) comporte un segment rétréci (13) au-dessus de la surface de liaison (14) avec le piston démultiplicateur (15).
EP04821076A 2004-01-16 2004-11-16 Injecteur de carburant dote d'un element de soupape d'injection a commande directe Expired - Fee Related EP1711707B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004002299A DE102004002299A1 (de) 2004-01-16 2004-01-16 Kraftstoffinjektor mit direkt angesteuertem Einspritzventilglied
PCT/EP2004/052980 WO2005068821A1 (fr) 2004-01-16 2004-11-16 Injecteur de carburant dote d'un element de soupape d'injection a commande directe

Publications (2)

Publication Number Publication Date
EP1711707A1 EP1711707A1 (fr) 2006-10-18
EP1711707B1 true EP1711707B1 (fr) 2008-07-02

Family

ID=34716614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04821076A Expired - Fee Related EP1711707B1 (fr) 2004-01-16 2004-11-16 Injecteur de carburant dote d'un element de soupape d'injection a commande directe

Country Status (6)

Country Link
US (1) US20070152080A1 (fr)
EP (1) EP1711707B1 (fr)
JP (1) JP2007514095A (fr)
CN (1) CN1906399A (fr)
DE (2) DE102004002299A1 (fr)
WO (1) WO2005068821A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004031790A1 (de) * 2004-07-01 2006-01-26 Robert Bosch Gmbh Common-Rail-Injektor
DE102006009659A1 (de) 2005-07-25 2007-02-01 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung für eine Brennkraftmaschine mit Kraftstoff-Direkteinspritzung
DE102005044830A1 (de) * 2005-09-20 2007-03-29 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung
DE102005050784A1 (de) * 2005-10-24 2007-04-26 Robert Bosch Gmbh Kraftstoffeinspritzventile für Brennkraftmaschinen
DE102005051438A1 (de) * 2005-10-27 2007-05-03 Daimlerchrysler Ag Kraftstoffinjektor für eine Brennkraftmaschine
DE102006019308A1 (de) * 2006-04-26 2007-10-31 Robert Bosch Gmbh Injektor
DE102007001363A1 (de) * 2007-01-09 2008-07-10 Robert Bosch Gmbh Injektor zum Einspritzen von Kraftstoff in Brennräume von Brennkraftmaschinen
DE502007002482D1 (de) * 2007-03-15 2010-02-11 Ford Global Tech Llc Injektor
DE102009024595A1 (de) * 2009-06-10 2011-03-24 Continental Automotive Gmbh Einspritzventil mit Übertragungseinheit
DE102009024596A1 (de) 2009-06-10 2011-04-07 Continental Automotive Gmbh Einspritzventil mit Übertragungseinheit
DE102011003452A1 (de) * 2011-02-01 2012-08-02 Robert Bosch Gmbh Kraftstoffeinspritzkomponente
KR101340888B1 (ko) 2012-10-30 2013-12-13 숭실대학교산학협력단 직접 구동방식 피에조 인젝터
JP2019060251A (ja) * 2017-09-25 2019-04-18 日立オートモティブシステムズ株式会社 高圧燃料供給装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19843534A1 (de) * 1998-09-23 2000-03-30 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19946840A1 (de) * 1999-09-30 2001-05-03 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
DE10032924A1 (de) * 2000-07-06 2002-01-24 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE10043625C2 (de) * 2000-09-05 2003-03-27 Bosch Gmbh Robert Hydraulisch übersetztes Ventil
DE10159750A1 (de) * 2001-12-05 2003-06-12 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10203657A1 (de) * 2002-01-30 2003-08-28 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10213858A1 (de) * 2002-03-27 2003-10-30 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10217594A1 (de) * 2002-04-19 2003-11-06 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10232193A1 (de) * 2002-07-16 2004-02-05 Robert Bosch Gmbh Brennstoffeinspritzventil

Also Published As

Publication number Publication date
DE502004007521D1 (de) 2008-08-14
US20070152080A1 (en) 2007-07-05
EP1711707A1 (fr) 2006-10-18
CN1906399A (zh) 2007-01-31
JP2007514095A (ja) 2007-05-31
WO2005068821A1 (fr) 2005-07-28
DE102004002299A1 (de) 2005-08-04

Similar Documents

Publication Publication Date Title
EP1831540B1 (fr) Injecteur de carburant dote d'un obturateur a commande directe
EP1756415B1 (fr) Injecteur de carburant a multiplication d'actionneur variable
WO2005075811A1 (fr) Injecteur de carburant avec obturateur d'injection a commande directe
EP1711707B1 (fr) Injecteur de carburant dote d'un element de soupape d'injection a commande directe
EP2030262A1 (fr) Dispositif équipé d'un actionneur piézoélectrique revêtu
DE102004028522A1 (de) Kraftstoffinjektor mit variabler Aktorhubübersetzung
WO2002053904A1 (fr) Soupape d'injection
EP1865189B1 (fr) Injecteur de carburant doté d'un actionnement piézo-électrique installé du côté basse pression
WO2012034749A1 (fr) Injecteur de carburant
DE102006019736A1 (de) Kraftstoffinjektor
DE102006015745A1 (de) Kraftstoffinjektor mit direktgesteuertem Einspritzventilglied
EP1466086B1 (fr) Piece de commande destinee a des injecteurs a aiguille d'injecteur manoeuvrable
EP1983186B1 (fr) Elément de commande à compensation de pression
WO2002057620A1 (fr) Soupape d'injection
WO2008113630A1 (fr) Injecteur de carburant à comportement d'injection amélioré
DE102010023698A1 (de) Einspritzventil mit Direkt- und Servoantrieb
EP2126333B1 (fr) Injecteur de carburant à coupleur
EP2439398B1 (fr) Soupape d'injection de combustible
WO2008061842A1 (fr) Injecteur de carburant
DE10043625C2 (de) Hydraulisch übersetztes Ventil
DE102005016794B4 (de) Kraftstoffinjektor mit Hubumkehr
DE102005026967A1 (de) Ventil, insbesondere Servoventil
DE10333688B3 (de) Kraftstoffeinspritzvorrichtung
DE102005025138B4 (de) Dosierventil
DE10333699A1 (de) Kraftstoffeinspritzvorrichtung

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: 20060816

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT SE

17Q First examination report despatched

Effective date: 20070111

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT SE

17Q First examination report despatched

Effective date: 20070111

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): DE FR GB IT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 502004007521

Country of ref document: DE

Date of ref document: 20080814

Kind code of ref document: P

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

Ref country code: IT

Payment date: 20081124

Year of fee payment: 5

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

Ref country code: FR

Payment date: 20081118

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

26N No opposition filed

Effective date: 20090403

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

Ref country code: GB

Payment date: 20081121

Year of fee payment: 5

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

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: 20081002

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

Effective date: 20091116

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100730

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: 20091130

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: 20091116

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

Ref country code: IT

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

Effective date: 20091116

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

Ref country code: DE

Payment date: 20130124

Year of fee payment: 9

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: 20140603

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502004007521

Country of ref document: DE

Effective date: 20140603