EP0142817B1 - Méthode de test pour système d'allumage de moteur à combustion interne - Google Patents

Méthode de test pour système d'allumage de moteur à combustion interne Download PDF

Info

Publication number
EP0142817B1
EP0142817B1 EP84113722A EP84113722A EP0142817B1 EP 0142817 B1 EP0142817 B1 EP 0142817B1 EP 84113722 A EP84113722 A EP 84113722A EP 84113722 A EP84113722 A EP 84113722A EP 0142817 B1 EP0142817 B1 EP 0142817B1
Authority
EP
European Patent Office
Prior art keywords
ignition
spark plug
combustion engine
operating state
internal combustion
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 - Lifetime
Application number
EP84113722A
Other languages
German (de)
English (en)
Other versions
EP0142817A3 (en
EP0142817A2 (fr
Inventor
Walter Weishaupt
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0142817A2 publication Critical patent/EP0142817A2/fr
Publication of EP0142817A3 publication Critical patent/EP0142817A3/de
Application granted granted Critical
Publication of EP0142817B1 publication Critical patent/EP0142817B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/12—Testing characteristics of the spark, ignition voltage or current

Definitions

  • the invention relates to a test method for ignition systems of internal combustion engines in motor vehicles.
  • the ignition system is checked for proper function.
  • the characteristic value of the ignition voltage signal for example the maximum value
  • the ignition voltage signal can also be compared with a corresponding signal from another cylinder or the ignition voltage signal of all cylinders. If these signals are the same as each other, the ignition device is OK, but if one or more of these signals deviate greatly from one another, the ignition system is likely to be faulty. However, this only allows a relatively rough statement about the condition of the ignition system.
  • the invention has for its object to provide a test method of the type mentioned, which provides precise information about the element determining the condition of the ignition system and thus about the ignition system as such.
  • the invention solves this problem in that, in order to test the electrode spacing of a spark plug, the desired signal is taken at the beginning of a test period and in an operating state which is at least approximately the same as the current operating state at the time of the test.
  • the invention initially assumes that the condition of the ignition system is determined almost exclusively by the spark plugs which are subject to wear, since further wear parts are not present, in particular in the case of contactless ignition systems.
  • Known test methods for spark plugs infer the state of the spark plugs from the level of the ignition voltage on the secondary side (cf. DE-OS 23 22 834, DE-OS 26 08 707 and US Pat. No. 2,430,069).
  • the invention offers two major advantages. On the one hand, the test is carried out on the basis of the ignition voltage signal on the primary side, the amplitudes of which are far lower than the signal on the secondary side.
  • the test is carried out without intervention in the ignition system, while in the known spark plug test methods the secondary-side ignition voltage signal is supplied externally with the aid of separate adapters.
  • the invention thus makes it possible to continuously determine the wear of the spark plugs without intervention in the ignition system and to provide a relative statement about the condition of the spark plugs at any time during operation.
  • This operating state can be, for example, the overrun operation of the internal combustion engine. Is it an internal combustion engine with so-called overrun fuel cutoff, i.e. the interruption of the fuel supply in overrun mode, the influence of the fuel-air mixture on the test result is completely excluded.
  • the switch available for the detection of overrun operation for example on the throttle valve, can also be used to initiate the test method. But even without overrun cut-off, overrun mode offers the possibility to carry out the test of the spark plug under approximately the same and constant test conditions. For this purpose, it is then still necessary to take into account the speed or the speed curve of the internal combustion engine.
  • the test period over which the entire test of the spark plug should extend can be chosen freely and with any starting point. In contrast, there are advantages to starting the test period with the start-up of the spark plug. This ensures that the spark plugs are in order at the beginning of the test period and that the changes in the primary-side ignition voltage signal are related to the total wear of the spark plug.
  • the start of the test period can be determined arbitrarily or with the aid of a signal triggered automatically when maintenance is carried out.
  • the prerequisite for the latter is that it involves maintenance in which the spark plugs are routinely replaced.
  • Diagrams A and B shown in FIG. 1 show the primary-side ignition voltage signal of a spark plug with a normal (A) and too large (B) electrode spacing. It can be clearly seen that the two ignition voltage signals differ essentially in three points. Firstly, the greater the electrode spacing, the greater the maximum amplitude (a). Secondly, the larger the electrode spacing, the greater the internal voltage (b), and thirdly, the shorter the electrode spacing, the longer the burning time (d).
  • the two diagrams A and B show the course of the ignition voltage signal in at least approximately the same operating state of the internal combustion engine, in the present case in overrun mode with the fuel supply switched off and the same number of engine revolutions.
  • the reason for the different course of the ignition voltage signals on the primary side is a correspondingly different course of the ignition voltage, not shown, on the secondary side signals. These, in turn, have their original ash in the different electrical conditions, which depend on the electrode spacing, for the ignition spark between the two electrodes of the spark plug during the burning period d.
  • the circuit shown in FIG. 2 serves to determine the ignition voltage amplitude a.
  • the ignition signal between an induction transmitter, not shown, and an ignition coil, also not shown is taken off (so-called terminal 1 signal) and fed via an amplitude attenuator 1 to a low-pass filter 2, a peak value meter 3 and a pulse shaper 4.
  • the output signal of the peak value meter 3 is digitized in an analog / digital converter 5 and stored in a measurement value memory 6. This is triggered by the signal from an induction transmitter (not shown) with a pulse shaper 7 connected downstream.
  • the digital values of ignition voltage amplitudes for the spark plug to be tested are stored and averaged in the measured value memory 6.
  • the speed is detected with the aid of the speed-proportional signals supplied by the induction transmitter to the pulse shaper.
  • the constant operating state is obtained with the aid of this rotational speed and an additional signal from a switch which is arranged, for example, on the throttle valve of the internal combustion engine and which is actuated when the throttle valve is closed.
  • the ignition voltage amplitude is thus determined for this operating state with the aid of averaging.
  • the test method includes determining the ignition voltage amplitude in the manner described when the spark plug is started up. A signal routinely triggered when maintenance is carried out is used for this purpose. With this setpoint value obtained with the aid of the spark plug to be tested, the respective ignition voltage amplitudes are now determined in the same way, for example when the same operating conditions of the internal combustion engine are present, and compared with the setpoint value in a downstream processing stage 8. If the current value of the ignition voltage amplitude deviates from this target value by a predetermined amount, a warning signal is generated in a known manner or the degree of wear of the spark plug is indicated in the context of a service interval display.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Claims (6)

1. Procédé pour contrôler des installations électriques d'allumage de moteurs à combustion interne dans des véhicule automobiles, procédé dans lequel un paramètre de signalisation de la tension d'allumage s'appliquant côté primaire sur la distance de décharge d'une bougie d'allumage, est déterminé individuellement ou bien sous forme de moyenne pour plusieurs processus d'allumage, et est comparé avec une valeur de consigne, procédé caractérisé en ce que la valeur de consigne est la valeur du paramètre de signalisation qui est prélevée, à l'aide de la bougie d'allumage à contrôler en ce qui concerne la distance entre ces électrodes, au début du laps de temps de contrôle et dans un état de fonctionnement de l'installation d'allumage qui est au moins approximativement identique à l'état de fonctionnement actuel à l'instant de contrôle.
2. Procédé selon la revendication 1, caractérisé en ce que l'état de fonctionnement est celui en inertie forcée du moteur à combustion interne, éventuellement lorsque l'alimentation en carburant est coupée.
3. Procédé selon la revendication 2, caractérisé en ce que l'état de fonctionnement est déterminé par d'autres paramètres de fonctionnement du moteur à combustion interne.
4. Procédé selon une des revendications 1 à 3, caractérisé en ce que le laps de temps de contrôle débute avec la mise en service de la bougie d'allumage.
5. Procédé selon la revendication 4, caractérisé en ce que la mise en service de la bougie d'allumage est fixée par un ordre émis lors de l'exécution d'une opération d'entretien.
6. Procédé selon la revendication 5, caractérisé en ce que cet ordre est susceptible d'être émis de façon arbitraire.
EP84113722A 1983-11-19 1984-11-14 Méthode de test pour système d'allumage de moteur à combustion interne Expired - Lifetime EP0142817B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3341880 1983-11-19
DE19833341880 DE3341880A1 (de) 1983-11-19 1983-11-19 Pruefverfahren fuer zuendanlagen von brennkraftmaschinen in kraftfahrzeugen

Publications (3)

Publication Number Publication Date
EP0142817A2 EP0142817A2 (fr) 1985-05-29
EP0142817A3 EP0142817A3 (en) 1986-03-26
EP0142817B1 true EP0142817B1 (fr) 1991-01-16

Family

ID=6214752

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113722A Expired - Lifetime EP0142817B1 (fr) 1983-11-19 1984-11-14 Méthode de test pour système d'allumage de moteur à combustion interne

Country Status (4)

Country Link
US (1) US4684896A (fr)
EP (1) EP0142817B1 (fr)
JP (1) JPS60119377A (fr)
DE (2) DE3341880A1 (fr)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825167A (en) * 1987-11-02 1989-04-25 General Motors Corporation Spark plug testing under dynamic load
KR960012145B1 (ko) * 1988-04-02 1996-09-16 로베르트 보쉬 게엠베하 스파크 점화 내연 기관의 연소를 모니터하는 방법 및 그 장치
US5155437A (en) * 1990-07-26 1992-10-13 Unison Industries Limited Partnership Diagnostic device for gas turbine ignition system
US5523691A (en) * 1990-07-26 1996-06-04 Unison Industries Limited Partnership Diagnostic device for gas turbine ignition system
US5370099A (en) * 1990-08-24 1994-12-06 Robert Bosch Gmbh Ignition system for internal combustion engines
DE4026723A1 (de) * 1990-08-24 1992-02-27 Bosch Gmbh Robert Zuendanlage fuer brennkraftmaschinen
JP2678986B2 (ja) * 1991-03-07 1997-11-19 本田技研工業株式会社 内燃機関の失火検出装置
US5283527A (en) * 1991-06-28 1994-02-01 Ford Motor Company Methods and apparatus for detecting short circuited secondary coil winding via monitoring primary coil winding
FR2680836A1 (fr) * 1991-08-29 1993-03-05 Renault Procede et dispositif de surveillance de l'ecartement des electrodes d'une bougie.
US5194813A (en) * 1991-09-16 1993-03-16 Hannah Kenneth H Spark ignition analyzer
FR2687255B1 (fr) * 1992-02-07 1994-03-25 Renault Regie Nale Usines Procede d'estimation de l'etat d'usure d'une bougie.
US5208540A (en) * 1992-02-28 1993-05-04 Coltec Industries Inc. Ignition performance monitor and monitoring method for capacitive discharge ignition systems
FR2712934B1 (fr) * 1993-11-22 1996-01-26 Marelli Autronica Procédé et dispositif d'allumage à bobine, pour moteur à allumage commandé.
AU2297495A (en) * 1994-04-19 1995-11-10 Gas Research Institute Breakdown voltage measurement apparatus and method
WO1996015366A1 (fr) * 1994-11-14 1996-05-23 Kayser William M Appareil d'analyse pour moteurs equipes de bougies d'allumage
US5635841A (en) * 1995-03-31 1997-06-03 Innova Electronic Corporation Electronic ignition control module test system
US5606118A (en) * 1995-09-05 1997-02-25 Ford Motor Company System and method for detecting misfire in an internal combustion engine
US5997360A (en) * 1997-10-14 1999-12-07 Gen-Kuong; Fernando Francisco Aircraft equipment configuration identification interface
US6044700A (en) * 1997-10-14 2000-04-04 Endevco Corporation Aircraft equipment configuration identification interface guide
US6006156A (en) * 1997-12-11 1999-12-21 Cummins Engine Company, Inc. Apparatus and method for diagnosing and controlling an ignition system of an internal combustion engine
US6408242B1 (en) 1997-12-11 2002-06-18 Cummins, Inc. Apparatus and method for diagnosing and controlling an ignition system of an internal combustion engine
DE19756336C1 (de) * 1997-12-18 1999-04-01 Daimler Benz Ag Verfahren und Vorrichtung zur Prüfung der Kompression sowie der Zündanlage einer Verbrennungskraftmaschine
US6392315B1 (en) * 1999-04-05 2002-05-21 Delphi Technologies, Inc. Compensation circuit for an automotive ignition sensing system
US7376497B2 (en) * 2001-09-21 2008-05-20 Innova Electronics Corporation Use of automotive diagnostics console to diagnose vehicle
KR20030025731A (ko) * 2001-09-24 2003-03-29 현대자동차주식회사 엔진에 장착된 상태의 스파크 플러그 간극 점검 방법
US20050182535A1 (en) * 2004-02-17 2005-08-18 David Huang Device and method for identifying a specific communication protocol used in an on-board diagnostic tool
US7603293B2 (en) 2005-06-24 2009-10-13 Innova Electronics Corporation Method of providing diagnostic information in connection with the sale of pre-owned vehicles
US8024083B2 (en) * 2005-06-30 2011-09-20 Chenn Ieon C Cellphone based vehicle diagnostic system
US8068951B2 (en) * 2005-06-24 2011-11-29 Chen Ieon C Vehicle diagnostic system
US20060293811A1 (en) * 2005-06-24 2006-12-28 Keith Andreasen Automotive data logger
US8019503B2 (en) * 2007-06-28 2011-09-13 Innova Electronics Corp Automotive diagnostic and remedial process
US9117319B2 (en) * 2005-06-30 2015-08-25 Innova Electronics, Inc. Handheld automotive diagnostic tool with VIN decoder and communication system
US20070143000A1 (en) * 2005-12-16 2007-06-21 Trevor Scott Bryant Wireless Spark Energy Indicator
DE102006011886A1 (de) * 2006-03-15 2007-09-20 Bayerische Motoren Werke Ag Vorrichtung und Verfahren zur Bestimmung des Verschleiß einer Zündkerze einer Brennkraftmaschine
US9026400B2 (en) 2007-06-28 2015-05-05 Innova Electonics, Inc. Diagnostic process for home electronic devices
US8370018B2 (en) * 2007-06-28 2013-02-05 Innova Electronics, Inc. Automotive diagnostic process
MX2010003797A (es) * 2007-10-09 2011-02-03 Flextronics Automotive Inc Sonda de sensor de bujia que utiliza pcb como antena.
US8306687B2 (en) * 2009-11-10 2012-11-06 Innova Electronics, Inc. Method of diagnosing a vehicle having diagnostic data
DE102011005651A1 (de) * 2011-03-16 2012-09-20 Man Diesel & Turbo Se Verfahren zur Bestimmung des Verschleißes von Elektroden einer Zündkerze und Vorrichtungen hierzu
CN103541852A (zh) * 2013-10-08 2014-01-29 成都泛华航空仪表电器有限公司 全自动化点火器试验系统
DE102016218662B4 (de) 2016-09-28 2022-01-13 Bayerische Motoren Werke Aktiengesellschaft Testen einer elektrischen Fahrzeug-Komponente
US11574510B2 (en) 2020-03-30 2023-02-07 Innova Electronics Corporation Multi-functional automotive diagnostic tablet with interchangeable function-specific cartridges
US11967189B2 (en) 2020-04-20 2024-04-23 Innova Electronics Corporation Router for communicating vehicle data to a vehicle resource
US11651628B2 (en) 2020-04-20 2023-05-16 Innova Electronics Corporation Router for vehicle diagnostic system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2343895A1 (de) * 1973-08-31 1975-03-13 Bosch Gmbh Robert Verfahren und einrichtung zur ueberpruefung der zuendanlage von brennkraftmaschinen

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430069A (en) * 1944-12-02 1947-11-04 Gilbert & Barker Mfg Co Apparatus for testing spark plugs
DE2322834A1 (de) * 1973-05-07 1974-11-28 Nicholas George Festos Tragbares pruefgeraet fuer zuendkerzen
DE2608707A1 (de) * 1976-03-03 1977-09-08 Daimler Benz Ag Verfahren und messgeraet zur messung des abstands zweier elektroden
US4053823A (en) * 1976-04-22 1977-10-11 Adamian Michael R Ignition arc monitor circuit
DE2752244A1 (de) * 1977-11-23 1979-06-07 Baum Elektrophysik Gmbh Verfahren und vorrichtung zum pruefen elektrischer zuendanlagen von otto-motoren
DE2759155C2 (de) * 1977-12-31 1986-04-03 Robert Bosch Gmbh, 7000 Stuttgart Schaltungsanordnung zur Erfassung der Funkendauer in Zündeinrichtungen für Brennkraftmaschinen
DE2811573A1 (de) * 1978-03-17 1979-09-27 Bosch Gmbh Robert Einrichtung zur ueberpruefung einer zuendanlage fuer brennkraftmaschinen
JPS56115866A (en) * 1980-02-15 1981-09-11 Nippon Denso Co Ltd Detector of abnormality in ignition signal for internal combustion engine
US4394742A (en) * 1980-10-31 1983-07-19 Fmc Corporation Engine generated waveform analyzer
DE3151415C2 (de) * 1981-12-24 1986-11-20 Daimler-Benz Ag, 7000 Stuttgart Verfahren zur Messung des Elektrodenabstandes der Zündkerzen eines Kraftfahrzeuges und Gerät zur Durchführung des Verfahrens
US4449100A (en) * 1982-04-05 1984-05-15 Ford Motor Company Ignition system tester
JPS5920866A (ja) * 1982-07-27 1984-02-02 Toyota Central Res & Dev Lab Inc 多気筒エンジンの点火プラグ検査装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2343895A1 (de) * 1973-08-31 1975-03-13 Bosch Gmbh Robert Verfahren und einrichtung zur ueberpruefung der zuendanlage von brennkraftmaschinen

Also Published As

Publication number Publication date
EP0142817A3 (en) 1986-03-26
JPS60119377A (ja) 1985-06-26
DE3341880A1 (de) 1985-05-30
US4684896A (en) 1987-08-04
DE3341880C2 (fr) 1987-10-15
EP0142817A2 (fr) 1985-05-29
DE3483952D1 (de) 1991-02-21

Similar Documents

Publication Publication Date Title
EP0142817B1 (fr) Méthode de test pour système d'allumage de moteur à combustion interne
DE3208587C2 (de) Einrichtung zur Erkennung von Zündaussetzern
DE4207140C2 (de) Fehlzündungsdetektorsystem zum Detektieren einer Fehlzündung in einem Verbrennungsmotor
DE3785439T2 (de) Verfahren und geraet zur feststellung und anzeige von zuendungsanomalien beim betrieb von zuendsystemen von verbrennungsmaschinen, insbesondere fuer mit einem katalysator ausgestattete motorfahrzeuge.
DE4116642C2 (de) Zündanlage einer Brennkraftmaschine mit einer Überwachungsschaltung zum Erkennen von Zündaussetzern
DE102015203758B4 (de) Verbrennungsmotor-Steuervorrichtung
DE4126961C2 (de) Klopfsteuer-Verfahren und Vorrichtung für Verbrennungskraftmaschinen
DE102014217402A1 (de) Verfahren und Vorrichtung zur Diagnose der Funktion eines Abgassensors
DE2343895A1 (de) Verfahren und einrichtung zur ueberpruefung der zuendanlage von brennkraftmaschinen
EP0752580B1 (fr) Circuit de mesure pour courant ionique
DE69720853T2 (de) Verfahren zur Ermittlung von vorzeitigen Zündungen
EP1222385A1 (fr) Dispositif et procede d'allumage pour moteur a combustion interne
DE3852390T2 (de) Einrichtung zur Erkennung von Zündaussetzern bei fremdgezündeten Brennkraftmaschinen.
EP0656096B1 (fr) Systeme d'allumage pour moteurs a combustion interne comprenant un dispositif de detection des defauts d'allumage par comparaison avec des allumages de reference de la meme bobine d'allumage
DE69331790T2 (de) Fehlzündungsdetektor mit verschiedenen Methoden bei hoher und niedriger Motorgeschwindigkeit
DE19646917A1 (de) Vorrichtung zum Erfassen eines Zustands einer Verbrennung in einer Brennkraftmaschine
DE19524499B4 (de) Zündanlage für eine Brennkraftmaschine
DE19822296A1 (de) Klopferfassungsvorrichtung für eine Brennkraftmaschine
DE10229848B4 (de) Feuerungszustandsermittlungssystem für Verbrennungsmotoren
DE4244181C2 (de) Fehlzündungs-Erfassungssystem für einen Verbrennungsmotor
DE4020986C2 (de) Elektronisches Zündsystem für eine Brennkraftmaschine
DE102011103427A1 (de) Verfahren und Vorrichtung zur Klopfregelung
DE3128027A1 (de) "vorrichtung zum erkennen des klopfens bei brennkraftmaschinen"
DE3338271A1 (de) Schaltung zur klopferkennung fuer ottomotoren
DE4244804C2 (de) Fehlzündungserfassungsvorrichtung für eine Brennkraftmaschine

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

AK Designated contracting states

Designated state(s): DE FR GB IT SE

RTI1 Title (correction)
PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19861105

17Q First examination report despatched

Effective date: 19880608

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

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3483952

Country of ref document: DE

Date of ref document: 19910221

ET Fr: translation filed
ITF It: translation for a ep patent filed
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
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19921102

Year of fee payment: 9

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

Ref country code: GB

Payment date: 19921110

Year of fee payment: 9

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

Ref country code: FR

Payment date: 19921127

Year of fee payment: 9

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

Ref country code: GB

Effective date: 19931114

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

Ref country code: SE

Effective date: 19931115

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

Effective date: 19931114

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

Ref country code: FR

Effective date: 19940729

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 84113722.7

Effective date: 19940610

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

Ref country code: DE

Payment date: 19981110

Year of fee payment: 15

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: 20000901