EP0688950B1 - Kraftstoffeinspritzsystem - Google Patents

Kraftstoffeinspritzsystem Download PDF

Info

Publication number: EP0688950B1
Authority: EP; European Patent Office
Prior art keywords: injection; fuel; valve; valve needle; pressure
Prior art date: 1994-06-21
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 - Lifetime

Application number

EP95107822A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP0688950A1 (de

Inventor

Maximilian Dr. Kronberger

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.)

1994-06-21

Filing date

1995-05-23

Publication date

1998-08-12

1995-05-23 Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH

1995-12-27 Publication of EP0688950A1 publication Critical patent/EP0688950A1/de

1998-08-12 Application granted granted Critical

1998-08-12 Publication of EP0688950B1 publication Critical patent/EP0688950B1/de

2015-05-23 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Images

Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
- F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
- F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
- F02M45/08—Injectors peculiar thereto
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/28—Details of throttles in fuel-injection apparatus

Definitions

the invention is based on a fuel injection system the genus of claim 1.
a fuel injection pump a distributor injection pump is provided, with a back and forth driven and at the same time rotating pump piston which rotates during its and its pump stroke one of several injection lines, which each lead to a fuel injector, supplied with fuel brought up to injection pressure.
a pressure valve is provided for each of these spray lines, that with high-pressure fuel delivery through the fuel injector opens in the conveying direction at the end the injection closes and also a pressure control valve has, which is suitable for pressure waves between the pressure valve and remove the fuel injector and in a desired constant pressure during this area to keep the injection breaks.
WO 90/08 296 there is also a fuel injection valve known with which triggered by the high pressure funding a fuel injection pump a pre and a Main injection is to be realized. Doing is inside of the fuel injection valve, an escape piston is provided, counter to the fuel high pressure supplied the force of a preloaded spring by a certain amount can be deflected. Parallel to this alternative piston is the pressurization of the valve needle of the fuel injector provided by the fed Fuel pressure against the force of a preloaded valve spring releases an injection opening at the start of injection.
the valve spring is also the return spring of the Compensating piston.
the known fuel injection valve also has a damping space on the back of the valve needle on that via a throttle connection with which the spring receiving fuel-filled space is connected. This Space is under low pressure, e.g. B. that of the pre-feed pump the fuel injection pump or the return pressure.
the Throttle point between the damping chamber and the fuel-filled Space is designed so that the valve needle initially a relatively large throttle cross section in their Release starting or closing position, but then this Throttle cross section during the opening movement of the valve needle is reduced, so that an increasing damping effect or an increasing restoring force on the valve needle takes effect.
the there in connection with the control of the The pre-injection design is said to be exact Allow separation between pre and main injection under Consideration of the dynamic behavior of the evasive piston, which is also the opening behavior of the Valve needle affected.
the object of the invention is in a generic Fuel injection pump these disadvantages with their impact to avoid the injection accuracy. This The object is achieved by the features of the license plate of claim 1 solved.
the solution according to the invention causes pressure surges on the switching movements of the electrically controlled valve and the dynamics of the valve needle of the would affect fuel injector, thereby reducing that the valve needle quickly increases the pressure or the control of the start of injection by closing the relief of the pump workspace by means of of the electrically controlled valve responds, but that as a result, the movement of the valve needle is advantageous Way is controlled.
the valve needle performs an even stroke movement through, through the throttle opening or through the this outflowing fuel is controlled.
FIG. 1 shows a basic illustration of a Fuel injection pump controlled by a solenoid valve 2 shows a longitudinal section through the middle Part of a first embodiment of a fuel injection valve as part of the fuel injection system according to the invention
Figure 3 shows a first embodiment of the part of the fuel injection valve essential to the invention a second embodiment according to Figure 2 and Figure 4 of the part essential to the invention on the fuel injector.
the solution according to the invention is based on a distributor injection pump realizable, as shown schematically in FIG. 1 is shown. It is a distributor injection pump the axial piston type, even if the object the invention also in other fuel injection pumps is usable such.
the type shown in Figure 1 is a pump piston 1 provided, which moves in a cylinder bore 2 and is rotatably arranged and there on the front Pump work room 10 includes.
the pump piston is there with a cam 6, the axially downward Has cams, e.g. B. via a spring, not shown coupled.
the cam disc is not rotating by one drive shaft shown further driven in a known manner, the cam disc under the influence of the spring on a known axially fixed roller ring expires and in consequently the pump piston into a reciprocating pump and sucking movement.
Fuel displaced under high pressure the pump piston comes with one of several injection lines 7 via a distributor groove 8 in the lateral surface of the pump piston in connection.
the distributor groove is thereby continuously via a longitudinal channel 9 with the pump work space connected.
the injection line runs through a pressure valve 12 to a fuel injection valve 3, the respective Cylinder is assigned to an internal combustion engine.
the pump work space 10 is supplied with fuel via a suction line 15, which is separated from a suction space 17, which is essentially only shown in dashed lines, and enclosed within the housing of the fuel injection pump is supplied.
the suction chamber receives fuel from a fuel feed pump 18, which is synchronous with the fuel injection pump, e.g. B. driven by the drive shaft and therefore fuel in speed-dependent quantities promotes in the suction chamber.
a fuel feed pump 18 is usually the pressure in the suction chamber controlled speed-dependent, if with the help of this Pressure additional functions of the fuel injection pump controlled should be.
An overflow throttle 22 flows continuously Fuel back to the reservoir 23, so that for cooling of the injection pump or degassing achieved thereby of the suction chamber is taken care of.
the suction line 15 leads via a check valve 16 in the pump work space, wherein the check valve opens towards the pump work area.
an electrically controlled one Valve 24 is provided which has a bypass line 21 controls to the pressure valve 16 and with its help when opening the valve a connection between the pump work space 10 and suction chamber 17 is made and when the valve is closed the pump work space 10 is closed. That as a solenoid valve symbolized electrically controlled valve 24 is controlled by a control device 25 according to operating parameters controlled in a manner known per se.
FIG 2 is the fuel injector only indicated in Figure 1 shown in parts in section.
the fuel injector In the fuel valve is via a feed hole 27 in the housing 26th the fuel injector is supplied with fuel after that via a pressure channel 28 to a pressure chamber 29 becomes.
the valve needle is in a longitudinal bore 37 guided and protrudes with its rear 38 in a damping room 39, the boundary wall opposite the rear 38 forms a stop 40 for the valve needle.
the Pressure pin 48 on a recess 50 which in Figure 3 in a Plane along the axis 51 of the valve needle a trapezoidal Has course. 3 shows the valve needle in their starting position, correspondingly closed injection bores shown.
the recess 50 connects due to their shape, the damping space 39 with the fuel-filled Room 43.
the connection opening is in this embodiment also designed so that it is fuel-filled Room 43 narrows like a funnel and thus forms a throttle lip 53 at the transition to the damping chamber, which together with the recess 50 the cross section of a Throttle opening 54 forms.
connection opening is a Bore is, this bore between the pressure-filled space 43 and damping chamber to be designed as a stepped bore on the damping chamber side, so that the throttle lip 53 initially has a paragraph follows and only then does the transition to stop 40 take place.
FIG. 4 A second embodiment is shown in FIG. 4.
the connection opening is again designed as a stepped bore and has no throttle lip in the present case.
the to the damping room facing edge 58 forms here together with the Recess 151 running with the stroke of the valve needle changing throttle cross section.
the throttle cross section can be changed by appropriate Design of the recess 50 and 150 also a graded reduction of the throttle cross section can be achieved. It is essential that at the start of the stroke of the valve needle a largest Cross-section as an overflow cross-section between the damping chamber 39 and space 43 is present, which has a relief bore 59 can be relieved and also through this hole be supplied with fuel under low pressure can. This fuel can return the Fuel injection pump, the suction chamber or a leak line be removed. Leak fuel also emerges from the pressure chamber 59 on the guidance of the valve needle into the damping space 39 a so that it is always filled with fuel.
the initially low throttling of the discharge of the Damping chamber 39 basically causes a controlled Lifting the valve needle when pressurized by injection pressure on her pressure shoulder 32 so that there is none uncontrolled pressure drop in the pressure chamber 29 comes.
the mass flow takes the square root of the injection pressure, i.e. degressive to. This makes the dependence on pressure surges during the opening movement the valve needle decreases and the injection result to a large extent independent of uncontrollable dynamic Stroke fluctuations in the injection system caused by sudden loading and unloading of the system over the electrically controlled valve arise. It becomes the injection accuracy significantly increased in connection with the Possibility, amount and time of the pre-injection depending to control many parameters.
valve needle closes quickly after the end of the spray and the pre-injection period or the main injection ended exactly will.

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)

EP95107822A 1994-06-21 1995-05-23 Kraftstoffeinspritzsystem Expired - Lifetime EP0688950B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE4421714		1994-06-21
DE4421714A DE4421714A1 (de)	1994-06-21	1994-06-21	Kraftstoffeinspritzsystem

Publications (2)

Publication Number	Publication Date
EP0688950A1 EP0688950A1 (de)	1995-12-27
EP0688950B1 true EP0688950B1 (de)	1998-08-12

Family

ID=6521151

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP95107822A Expired - Lifetime EP0688950B1 (de)	1994-06-21	1995-05-23	Kraftstoffeinspritzsystem

Country Status (5)

Country	Link
US (1)	US5533481A (ja)
EP (1)	EP0688950B1 (ja)
JP (1)	JPH0821337A (ja)
KR (1)	KR100377894B1 (ja)
DE (2)	DE4421714A1 (ja)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5954487A (en) *	1995-06-23	1999-09-21	Diesel Technology Company	Fuel pump control valve assembly
DE19636896C1 (de)	1996-09-11	1998-05-07	Daimler Benz Ag	Kraftstoffeinspritzdüse für Brennkraftmaschinen
US6045054A (en) *	1998-04-23	2000-04-04	Siemens Automotive Corporation	Air shroud for air assist fuel injector
GB2339451A (en) *	1998-07-10	2000-01-26	Lucas Ind Plc	A fuel injector with control chamber and a damped needle valve
DE19834120A1 (de) *	1998-07-29	2000-02-03	Bosch Gmbh Robert	Kraftstoffversorgungsanlage einer Brennkraftmaschine
US6158419A (en) *	1999-03-10	2000-12-12	Diesel Technology Company	Control valve assembly for pumps and injectors
US6089470A (en) *	1999-03-10	2000-07-18	Diesel Technology Company	Control valve assembly for pumps and injectors
DE19930832A1 (de) *	1999-07-03	2001-01-11	Bosch Gmbh Robert	Kraftstoffeinspritzventil
DE19947194A1 (de) *	1999-10-01	2001-04-05	Bosch Gmbh Robert	Kraftstoffeinspritzventil für Brennkraftmaschinen
US6450778B1 (en)	2000-12-07	2002-09-17	Diesel Technology Company	Pump system with high pressure restriction
DE10112426A1 (de) *	2001-03-15	2002-09-19	Bosch Gmbh Robert	Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10119603A1 (de) *	2001-04-21	2002-10-24	Bosch Gmbh Robert	Kraftsotffeinspritzeinrichtung für eine Brennkraftmaschine
DE10201529A1 (de) *	2002-01-17	2003-07-31	Volkswagen Ag	Pumpe-Düse-Element für eine Brennkraftmaschine
DE202005009909U1 (de) *	2005-06-23	2006-10-26	Liebherr-Aerospace Lindenberg Gmbh	Federsystem
ES1063691Y (es) *	2006-09-12	2007-02-16	Vicorgilta S L	Barandilla de seguridad en obras
DE102006062491A1 (de) *	2006-12-28	2008-07-03	Robert Bosch Gmbh	Vorrichtung zur Dosierung von Kraftstoff zum Abgassystem eines Verbrennungsmotors
CN114635818A (zh) *	2022-03-09	2022-06-17	哈尔滨工程大学	一种利用柔性液压阻尼实现共轨喷油器稳定喷射的高速电磁阀

Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO1990008256A1 (de) *	1989-01-12	1990-07-26	Voest-Alpine Automotive Gesellschaft M.B.H.	Kraftstoffeinspritzdüse

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS62110566U (ja)	1985-12-27	1987-07-14
JPH03504155A (ja)	1989-01-18	1991-09-12	モギレフスキー、チェフノロギーチェスキー　インスチツート	多分散物質の熱処理装置
FI88333C (fi) *	1991-06-25	1993-04-26	Waertsilae Diesel Int	Foerbaettrat insprutningsventilarrangemang foer braensle
EP0534491B1 (en) *	1991-09-27	1996-08-14	Nippondenso Co., Ltd.	Fuel injection control system with split fuel injection for diesel engine
DE4230641A1 (de) *	1992-09-12	1994-03-17	Bosch Gmbh Robert	Kraftstoff-Einspritzdüse mit Additiveinspritzung für Dieselmotoren
JPH07145750A (ja) *	1993-11-25	1995-06-06	Zexel Corp	燃料噴射制御装置

1994
- 1994-06-21 DE DE4421714A patent/DE4421714A1/de not_active Withdrawn
1995
- 1995-05-23 DE DE59503133T patent/DE59503133D1/de not_active Expired - Lifetime
- 1995-05-23 EP EP95107822A patent/EP0688950B1/de not_active Expired - Lifetime
- 1995-05-30 US US08/452,755 patent/US5533481A/en not_active Expired - Fee Related
- 1995-06-20 JP JP7153550A patent/JPH0821337A/ja active Pending
- 1995-06-20 KR KR1019950016364A patent/KR100377894B1/ko not_active IP Right Cessation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO1990008256A1 (de) *	1989-01-12	1990-07-26	Voest-Alpine Automotive Gesellschaft M.B.H.	Kraftstoffeinspritzdüse

Also Published As

Publication number	Publication date
JPH0821337A (ja)	1996-01-23
EP0688950A1 (de)	1995-12-27
KR960001469A (ko)	1996-01-25
DE4421714A1 (de)	1996-01-04
US5533481A (en)	1996-07-09
DE59503133D1 (de)	1998-09-17
KR100377894B1 (ko)	2003-05-22

Publication	Publication Date	Title
EP0141044B1 (de)	1989-06-14	Kraftstoffeinspritzeinrichtung mit Vor- und Haupteinspritzung bei Brennkraftmaschinen
EP0688950B1 (de)	1998-08-12	Kraftstoffeinspritzsystem
DE2558789C2 (ja)	1989-04-13
DE3834235C2 (de)	2000-11-16	Kraftstoffeinspritzdüse zur zweistufigen Kraftstoffeinspritzung
DE2602280A1 (de)	1976-07-29	Hochdruck-kraftstoffeinspritzeinrichtung fuer dieselmotoren
DE2834633C2 (de)	1987-05-14	Vorrichtung zur Steuerung der Kraftstoffvoreinspritzung durch Zwischenentlastung bei einer Kraftstoffeinspritzanlage für eine Brennkraftmaschine
EP0116168A2 (de)	1984-08-22	Kraftstoffeinspritzpumpe
DE3914876A1 (de)	1989-11-23	Kraftstoffinjektor
DE3521427C2 (ja)	1991-04-18
DE4320620B4 (de)	2004-04-01	Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
EP0290797B1 (de)	1992-04-01	Kraftstoffeinspritzpumpe
DE3719831A1 (de)	1988-12-22	Kraftstoffeinspritzpumpe
EP0204982B1 (de)	1991-11-13	Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
CH672660A5 (ja)	1989-12-15
DE3722265A1 (de)	1989-01-19	Kraftstoffeinspritzpumpe
DE3211877A1 (de)	1983-10-06	Kraftstoffeinspritzpumpe
DE69625992T2 (de)	2003-11-13	Einspritzventil
DE19629107C2 (de)	1998-08-06	Vorrichtung zum Einspritzen von Kraftstoff und einem Zusatzfluid in den Brennraum eines Dieselmotors
DE4106813A1 (de)	1992-09-10	Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE3247584A1 (de)	1983-11-10	Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE3236828A1 (de)	1983-04-21	Brennstoffeinspritzvorrichtung
EP0151562B1 (de)	1989-10-11	Kraftstoffeinspritzdüse
DE2165443A1 (de)	1972-07-27	Einspritzvorrichtung
DE3807965C2 (de)	1994-08-25	Pumpedüse
EP0713002B1 (de)	2002-10-23	Kraftstoffhochdruckpumpe für Brennkraftmaschinen

Legal Events

Date	Code	Title	Description
1995-11-10	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
1995-12-27	AK	Designated contracting states	Kind code of ref document: A1 Designated state(s): DE FR GB IT
1996-08-28	17P	Request for examination filed	Effective date: 19960627
1997-06-11	17Q	First examination report despatched	Effective date: 19970425
1997-10-08	GRAG	Despatch of communication of intention to grant	Free format text: ORIGINAL CODE: EPIDOS AGRA
1997-12-03	GRAG	Despatch of communication of intention to grant	Free format text: ORIGINAL CODE: EPIDOS AGRA
1997-12-03	GRAH	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOS IGRA
1998-03-27	GRAH	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOS IGRA
1998-06-26	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1998-08-12	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE FR GB IT
1998-09-17	REF	Corresponds to:	Ref document number: 59503133 Country of ref document: DE Date of ref document: 19980917
1998-11-04	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)	Effective date: 19981013
1998-11-13	ET	Fr: translation filed
1999-06-18	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1999-06-18	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1999-08-04	26N	No opposition filed
2001-05-08	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 20010508 Year of fee payment: 7
2001-05-28	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 20010528 Year of fee payment: 7
2002-01-01	REG	Reference to a national code	Ref country code: GB Ref legal event code: IF02
2002-05-23	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: 20020523
2003-01-15	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 20020523
2003-01-31	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: 20030131
2003-02-28	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST
2005-05-23	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: 20050523
2011-11-30	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 20110726 Year of fee payment: 17
2013-03-21	REG	Reference to a national code	Ref country code: DE Ref legal event code: R119 Ref document number: 59503133 Country of ref document: DE Effective date: 20121201
2013-06-28	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: 20121201