WO2005119045A1 - Soupape d'injection - Google Patents

Soupape d'injection Download PDF

Info

Publication number
WO2005119045A1
WO2005119045A1 PCT/EP2004/051618 EP2004051618W WO2005119045A1 WO 2005119045 A1 WO2005119045 A1 WO 2005119045A1 EP 2004051618 W EP2004051618 W EP 2004051618W WO 2005119045 A1 WO2005119045 A1 WO 2005119045A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle needle
control chamber
inner nozzle
sealing sleeve
injection valve
Prior art date
Application number
PCT/EP2004/051618
Other languages
German (de)
English (en)
Inventor
Jürgen Dick
Werner Reim
Original Assignee
Siemens Aktiengesellschaft
Freudenberg, Hellmut
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 Siemens Aktiengesellschaft, Freudenberg, Hellmut filed Critical Siemens Aktiengesellschaft
Publication of WO2005119045A1 publication Critical patent/WO2005119045A1/fr

Links

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
    • 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
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators

Definitions

  • the invention relates to an injection valve, in particular an injection valve for metering fuel in a diesel internal combustion engine.
  • register nozzle injection valves have become known with two injection nozzle circuits and associated first and second nozzle needles, by means of which a gradual opening or closing of the individual injection nozzle circuits is possible.
  • a valve is known from EP 0 976 649 A2.
  • the valve has a housing in which a valve drive designed as a piezo actuator and a nozzle body are arranged.
  • the nozzle body has a first row of injection holes and a second row axially spaced therefrom Row of injection holes.
  • a nozzle needle is guided in a recess of the nozzle body and, in its closed position, prevents the fuel flow through both the first and the second row of injection holes and, in its open position, at least releases the fuel flow through the first row of injection holes.
  • the nozzle needle acts via an entraining mechanism on an insert body which forms an inner nozzle needle.
  • the inner nozzle needle prevents fuel flow through the second row of injection holes and enables the other positions to flow through the second row of injection holes.
  • the piezo actuator acts on the nozzle needle via a servo valve.
  • the servo valve includes a drain hole, a valve stem, a closing member, a control chamber and a leakage space.
  • the result of this is that it first releases the first row of injection holes and then, with falling pressure in the control chamber, the inner nozzle needle is moved from its closed position to its open position via the driver mechanism, and thus the second row of injection holes is also released.
  • the first row of injection holes is designed so that its cross section is significantly smaller than the cross section of the injection holes of the second row.
  • the result of this is that the fuel, which is metered through the first row of injection holes into the combustion chamber of the internal combustion engine, is significantly finer is dusted. This is particularly advantageous in part-load operation of the internal combustion engine, in which a smaller amount of fuel is injected and then smaller fuel drops occur due to the smaller diameter of the injection holes, and soot formation is thus reduced.
  • the significantly larger diameter of the second row of injection holes can then ensure in the full-load operation of the internal combustion engine that a sufficient amount of fuel is metered into the respective combustion chamber of the cylinder.
  • a common rail injector is known with a nozzle needle, which prevents a fuel flow through an injection nozzle in its closed position and releases a fuel flow through the injection nozzle in its open position.
  • a control chamber is formed, which is encapsulated by means of a sleeve, which is biased by a nozzle spring against a wall of the recess, from a nozzle spring chamber such that the control chamber and the nozzle spring chamber are hydraulically coupled to one another only via a feed throttle.
  • an injection device for an internal combustion engine with coaxially arranged first and second nozzle needles for opening and closing a first and a second injection opening.
  • the object of the invention is to provide an injection valve which has an outer nozzle needle with a recess into which an inner nozzle needle is introduced and in which the inner and outer nozzle needles can be controlled simply and precisely.
  • the object is achieved by the features of the independent claim.
  • Advantageous embodiments of the invention are characterized in the subclaims.
  • the invention is characterized by an injection valve with a body which has a first recess in which an outer nozzle needle is arranged.
  • the outer nozzle needle has a recess, which is inserted into an inner nozzle needle.
  • the outer nozzle needle and body are configured such that the outer nozzle needle prevents fluid flow through a first injection hole when it is in its closed position and releases it when it is out of its closed position.
  • the inner nozzle needle and body are configured such that the inner nozzle needle prevents fluid flow through a second injection hole when it is in its closed position and releases it when it is outside its closed position.
  • a first control chamber is provided, into which the inner nozzle needle opens, and a second control chamber is provided, into which the outer nozzle needle opens.
  • a sealing sleeve is provided which is brought into sealing contact with a contact surface of the inner nozzle needle by means of a spring and thus separates the first from the second control chamber.
  • the first and the second control chamber are designed such that the position of the inner nozzle needle can be controlled by the fluid pressure in the first control chamber and the position of the outer nozzle needle can be controlled by the fluid pressure in the second control chamber.
  • a switching valve is assigned in each case in the first or second control chamber, and the fluid pressure in the first or second control chamber can be set by means of this.
  • the body of the injection valve can be formed in one piece. However, it is preferably composed of several parts.
  • two control rooms which are decoupled from one another are thus created in an extremely simple manner, and there is thus the possibility of actuating the first and second control rooms independently of one another with appropriately designed switching valves.
  • the inner and outer nozzle needles can then be controlled independently of one another in their respective open and closed positions.
  • the spring is a spiral spring and the sealing sleeve extends into a cylinder space enclosed by the spring. In this way, the fluid volume of the first control chamber can be kept very low. This has the advantage that the response time of the inner nozzle needle to switching the switching valve is very short.
  • the inner nozzle needle has a pin which extends into the sealing sleeve. This also makes it easy to ensure that the first control chamber takes up a very small volume of fluid.
  • the pin projects into the cylinder space enclosed by the spring. In this way, the fluid volume of the first control chamber can be reduced further.
  • the sealing sleeve has a biting edge, which is formed at the axial end of the sealing sleeve, which is sealingly brought into contact with the contact surface of the inner nozzle needle.
  • the bite edge is formed radially on the outside.
  • an outlet throttle is assigned to the first control chamber, via which it is hydraulically coupled to the switching valve.
  • the response time of the inner nozzle needle can be easily adapted to a switching process of the respective switching valve using the drain valve.
  • FIG. 2 shows an enlargement of a partial area of a first embodiment of the injection valve according to FIG. 1,
  • FIG. 3 shows an enlargement of the partial area of a second embodiment of the injection valve according to FIG. 1,
  • FIG. 4 shows an enlargement of the partial area of a third embodiment of the injection valve according to FIG. 1.
  • An injection valve (FIG. 1) has an injector housing 1.
  • An actuator 4 is arranged in a recess 2 of the injector housing 1 and is preferably designed as a piezo actuator.
  • the piezo actuator is designed as a stack of piezo elements and changes its axial extent depending on the electrical energy supplied or discharged to it.
  • the piezo actuator is coupled to a transformer, which is also arranged in the recess 2 of the injector housing 1.
  • a leakage space 14 is formed in the recess 2 of the injector housing 1 and can be connected to a low-pressure fuel circuit via a leakage bore.
  • the injection valve further comprises a valve plate 16, a throttle plate 18, a needle guide body 20 and a nozzle body 21.
  • the valve plate 16, the throttle plate 18, the needle guide body 20 and the nozzle body 21 form a nozzle assembly, which is fastened to the electrode housing 1 by means of a nozzle clamping nut 22 is.
  • the needle guide body 20 has a first recess 24, which is continued as the recess 26 of the nozzle body 21 and in which an outer nozzle needle 27 is arranged.
  • the outer nozzle needle 27 is guided in the needle guide body 20.
  • An inner nozzle needle 29 is arranged in a recess 28 of the outer nozzle needle 27, preferably coaxially with the latter, and is guided in the recess 28 of the outer nozzle needle 27.
  • the recess 28 of the outer nozzle needle 27 completely penetrates the outer nozzle needle 27 in the axial direction.
  • a first nozzle spring 30 biases the outer nozzle needle 27 into a closed position in which it prevents the fuel flow through at least one first injection hole 34.
  • a second nozzle spring 32 is arranged in such a way that it prestresses the inner nozzle needle 29 into a closed position assigned to it, in which it prevents the fuel flow through at least one second injection hole 36.
  • a control chamber recess 38 (FIG. 2) of the throttle plate 18 is formed in the region of its end facing the needle guide body 20.
  • the first recess 24 of the needle guide body 20 opens into the control chamber recess 38.
  • a cavity 50 is formed in the throttle plate 18, which receives the second nozzle spring 32, which is supported on a shoulder 42 of the cavity 50 on the one hand and on the other hand presses a sealing sleeve 40 onto a contact surface 64 of the inner nozzle needle 29.
  • the sealing sleeve 40 is guided in the cavity 50.
  • the wall of the cavity 50, at least in the area in which the sealing sleeve 40 is guided, and the outer wall of the sealing sleeve 40 are made very precisely in terms of their dimensions, in order to ensure that the least possible leakage between the wall of the cavity 50 and the outer circumference of the sealing sleeve 40 is possible.
  • the sealing sleeve 40 preferably has a biting edge 44 at the axial end which faces the contact surface 64 of the inner nozzle needle 29.
  • the biting edge is formed radially on the outside.
  • the sealing sleeve 40 thus separates a first control chamber 46 from a second control chamber 48.
  • the first control chamber is limited by the contact surface 64 of the inner nozzle needle 29 located radially inside the biting edge 46, by the sealing sleeve 40 and the walls of the cavity 50 in the throttle plate 18.
  • the first control chamber 46 is hydraulically coupled via a first inlet throttle 52 to a high-pressure bore 54, which can be coupled to a high-pressure circuit of the fuel supply.
  • the first control chamber 46 is also hydraulically coupled via an outlet throttle 56 to a first outlet bore 58, which in turn is hydraulically coupled to the switching valve 60, which is designed in particular as a servo valve and is driven by the actuator designed as a piezo actuator 4.
  • the inner nozzle needle 29 has a high pressure shoulder that is in contact with fluid that is approximately at the pressure that the fluid has in the high pressure bore 54.
  • the high-pressure shoulder is designed such that the force caused by the pressure of the fluid has an opening effect on the inner nozzle needle 29.
  • the position of the inner nozzle needle 29 ultimately depends on the balance of forces of the forces caused by the pressure of the fluid on the high-pressure heel and on the other hand the spring force and the force caused by the pressure of the fluid located in the first control chamber 46 , and the force caused thereby is introduced via the contact surface 64 of the inner nozzle needle 29 and the shoulder 42 of the inner nozzle needle 29 in the closing direction of the nozzle needle 29.
  • the first inlet throttle 52 can be adapted to the desired response behavior of the first control chamber 46 and can be dimensioned independently of the response behavior of the second control chamber 48.
  • the flow restrictor 56 can also be adapted to the desired response behavior of the first control chamber 46. In connection with the switching valve 60 in particular, this has the advantage that only the cross is used to change the response behavior cut the flow restrictor 56 is to be adjusted and the switching valve 60 can be used unchanged.
  • the second control chamber 48 comprises the area of the first recess 24 of the needle guide body 20, which is located radially outside the bite edge 44 of the sealing sleeve 40, and the control chamber recess 38. It also optionally includes a second drain hole 68, up to a possibly existing further outlet throttle ,
  • the second control chamber 48 is hydraulically coupled to the high-pressure bore 54 by means of a second inlet throttle 66.
  • the second control chamber is hydraulically coupled to the control valve 60 by means of the second drain hole 68.
  • the response behavior of the second control chamber 48 can be set by dimensioning the second inlet throttle 66.
  • the outer nozzle needle 27, like the inner nozzle needle 29, has a high-pressure shoulder which is pressurized with high-pressure fluid from the high-pressure bore 54 and which is designed such that the force caused by the pressure of the fluid has an opening effect on the outer nozzle needle 27.
  • This force acts against the force exerted by the first nozzle spring 30 in the closing direction and the force caused by the pressure of the fluid in the second control chamber 48 on the outer nozzle needle 27, which is introduced via a contact surface 70 of the outer nozzle needle 27.
  • the position of the outer nozzle needle 27 can be adjusted depending on the balance of forces of these forces.
  • the switching valve 60 can be designed, for example, as a two-stage servo valve, which is designed such that, depending on the stroke of the actuator 4, the first drain hole 58 is first hydraulically coupled to the leakage space 14 and when the stroke continues to increase, the second drain hole 68 is then also coupled to the leakage space 14.
  • the inner nozzle needle 29 can thus be moved axially out of its closed position towards its open position, in which it preferably bears with its contact surface against a wall of the throttle plate 18. It can also be brought back into its closed position without the outer nozzle needle 27 necessarily being moved out of its closed position.
  • the two-stage servo valve which can also be referred to as a double servo valve, thus has the advantage that it only requires one actuator, but essentially has the function of two separately designed servo valves.
  • the switching valve 60 can, however, be designed as two separate servo valves, which can optionally be controlled independently of one another.
  • the outer nozzle needle 27 and the inner nozzle needle 29 can then be controlled completely independently of one another.
  • the sealing sleeve 40 extends axially beyond the area on which the second nozzle spring rests, into the cavity 50 and specifically into a cylinder space enclosed by the second nozzle spring 32.
  • the volume of the first control chamber 46 can easily be adapted. In particular, it can thus be reduced, which leads to a faster response of the inner nozzle needle 29 to changes in the switching position of the switching valve 60.
  • the inner nozzle needle 29 has a pin 74 which extends through the recess 73 of the sealing sleeve 40 into the cavity 50.
  • the diameter and the axial extent of the pin 74 also make it easy to set the free volume of the first control chamber 46.
  • the pin 74 can extend as far into the cavity 50.
  • the pin 74 can also be present in the case of the second embodiment of the injection valve.

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

La présente invention concerne une soupape d'injection comprenant un corps dans lequel se trouvent un pointeau de soupape externe et un pointeau de soupape interne (27, 29), le pointeau de soupape interne (29) étant guidé dans une ouverture du pointeau de soupape externe (27). Un premier et un second espace de commande (46,48) servent à régler les positions axiales des pointeaux de soupape (27, 29) par une régulation correspondante de la pression respective. Un manchon d'étanchéité (40) prend appui grâce à un ressort, de façon étanche contre une surface de contact (64) du pointeau de soupape interne (29), et sépare ainsi le premier espace de commande (46) du second espace de commande (48).
PCT/EP2004/051618 2004-06-03 2004-07-27 Soupape d'injection WO2005119045A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004027143 2004-06-03
DE102004027143.7 2004-06-03

Publications (1)

Publication Number Publication Date
WO2005119045A1 true WO2005119045A1 (fr) 2005-12-15

Family

ID=34958251

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/051618 WO2005119045A1 (fr) 2004-06-03 2004-07-27 Soupape d'injection

Country Status (1)

Country Link
WO (1) WO2005119045A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8480009B2 (en) 2010-07-30 2013-07-09 Caterpillar Inc. Large bore fuel system and fuel injector for same
WO2017071992A1 (fr) * 2015-10-27 2017-05-04 Delphi International Operations Luxembourg S.À R.L. Agencement de soupape de commande d'un injecteur de carburant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002322970A (ja) * 2001-04-26 2002-11-08 Toyota Motor Corp 燃料噴射装置
US20030010845A1 (en) * 2001-07-13 2003-01-16 Carroll John T. Rate shaping fuel injector with limited throttling
US20030015599A1 (en) * 2001-07-19 2003-01-23 Carroll John T. Fuel injector with injection rate control
US20040011882A1 (en) * 2002-05-14 2004-01-22 Robert Bosch Gmbh Fuel injection system for an internal combustion engine
DE10246974A1 (de) * 2002-10-09 2004-04-22 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung für eine Brennkraftmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002322970A (ja) * 2001-04-26 2002-11-08 Toyota Motor Corp 燃料噴射装置
US20030010845A1 (en) * 2001-07-13 2003-01-16 Carroll John T. Rate shaping fuel injector with limited throttling
US20030015599A1 (en) * 2001-07-19 2003-01-23 Carroll John T. Fuel injector with injection rate control
US20040011882A1 (en) * 2002-05-14 2004-01-22 Robert Bosch Gmbh Fuel injection system for an internal combustion engine
DE10246974A1 (de) * 2002-10-09 2004-04-22 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung für eine Brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 03 5 May 2003 (2003-05-05) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8480009B2 (en) 2010-07-30 2013-07-09 Caterpillar Inc. Large bore fuel system and fuel injector for same
WO2017071992A1 (fr) * 2015-10-27 2017-05-04 Delphi International Operations Luxembourg S.À R.L. Agencement de soupape de commande d'un injecteur de carburant
KR20180067689A (ko) * 2015-10-27 2018-06-20 델피 테크놀로지스 아이피 리미티드 연료 분사기의 제어 밸브 장치
CN108291519A (zh) * 2015-10-27 2018-07-17 德尔福知识产权有限公司 燃料喷射器的控制阀装置
US10801456B2 (en) 2015-10-27 2020-10-13 Delphi Technologies Ip Limited Control valve arrangement of a fuel injector
KR102615468B1 (ko) 2015-10-27 2023-12-19 델피 테크놀로지스 아이피 리미티드 연료 분사기의 제어 밸브 장치

Similar Documents

Publication Publication Date Title
EP1831537B1 (fr) Injecteur de systeme d'injection de carburant d'un moteur a combustion interne
WO2010081574A1 (fr) Injecteur de carburant pour moteurs à combustion interne
EP1640604A1 (fr) Servovalve et soupape d'injection
EP1952011A1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne a injection directe de carburant
EP1630409A1 (fr) Soupape servo et soupape d'injection
DE102005034879B4 (de) Düsenbaugruppe für ein Einspritzventil
DE10353045A1 (de) Kraftstoffeinspritzventil
WO2005119045A1 (fr) Soupape d'injection
DE102004014198B3 (de) Servoventil und Einspritzventil
EP2394048B1 (fr) Ensemble d'injection pour un injecteur
DE102005023368B4 (de) Düsenbaugruppe für ein Einspritzventil und Einspritzventil
DE102005025638B4 (de) Schaltventil und Einspritzventil und ein Verfahren zum Steuern eines Einspritzventils
DE102004049702B3 (de) Servoventil und Einspritzventil
WO2005075810A1 (fr) Soupape d'injection
DE102004036367B3 (de) Einspritzventil
EP2294308A1 (fr) Injecteur de carburant
DE102004060180B4 (de) Düsenbaugruppe und Einspritzventil
EP1614892A1 (fr) Soupape d'injection de carburant avec une soupape à balle pour une servo valve à deux étapes
DE102005022535A1 (de) Einspritzventil und Düsenbaugruppe für ein Einspritzventil
DE102006035832A1 (de) Einspritzventil und Düsenbaugruppe für das Einspritzventil
WO2008049726A1 (fr) Dispositif de dosage de fluide
DE102009051677B4 (de) Einspritzventil
DE102009039609A1 (de) Injektorbaugruppe mit Drosselelement
WO2006034910A1 (fr) Dispositif d'injection de carburant
EP1636481A1 (fr) Injecteur pour moteurs a combustion interne

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

122 Ep: pct application non-entry in european phase