EP0344349B1 - Detecting misfiring in spark ignition engines - Google Patents
Detecting misfiring in spark ignition engines Download PDFInfo
- Publication number
- EP0344349B1 EP0344349B1 EP19880108869 EP88108869A EP0344349B1 EP 0344349 B1 EP0344349 B1 EP 0344349B1 EP 19880108869 EP19880108869 EP 19880108869 EP 88108869 A EP88108869 A EP 88108869A EP 0344349 B1 EP0344349 B1 EP 0344349B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- comparator
- misfiring
- spark
- ignition
- 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
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
-
- 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
- F02P11/00—Safety means for electric spark ignition, not otherwise provided for
- F02P11/06—Indicating unsafe conditions
Definitions
- This invention relates to the detection of misfiring in spark ignition engines.
- misfiring for example due to worn spark plugs, defective ignition cable or the like
- it is particularly desirable to detect misfiring (for example due to worn spark plugs, defective ignition cable or the like) as soon as it begins to occur because it can lead to overheating or ruining of the catalyst due to the presence of unburnt fuel in the exhaust from the engine.
- the EP-A-20 069 describes an apparatus for testing an internal combustion engine ignition system, with a detected signal indicative of the voltage in the primary windings of the ignition coil. This signal is compared with a generated reference voltage having a predetermined magnitude and a predetermined duration. When the magnitude of a signal derived from the detected signal falls below the predetermined magnitude of the generated reference voltage after the end of the predetermined duration, a fault condition is indicated.
- misfiring is detected from the voltage characteristic induced in the ignition coil when a spark occurs.
- the secondary voltage is maintained at a certain level for a certain length of time until the ignition spark breaks down.
- the primary voltage may decay immediately from an initially high voltage or the spark may break down very quickly.
- the shape of the voltage characteristic can be used to detect misfiring.
- the present invention provides a method of detecting misfiring in an internal combustion engine comprising detecting a signal indicative of the voltage induced in the primary winding of the ignition coil, generating a reference voltage representing normal firing and comparing the detected voltage with the reference voltage.
- the reference voltage is a pulse having a predetermined magnitude and a predetermined duration and the detected voltage is compared to the reference voltage so as to detect when the magnitude of the detected voltage falls below said predetermined magnitude before the end of the duration.
- the circuit comprises a transistor T1 whose base is connected to the terminal KL 15 of the ignition coil via resistor R1 and diode D1.
- the collector of the transistor T1 is connected to ground via resistors R2 and R3.
- the emitter is connected to a terminal KL 1.
- the terminals KL1 and KL15 are the primary terminals of the ignition coil with KL15 on the battery side such that the voltage at KL15 is the battery voltage supplied via the ignition lock.
- the junction between resistors R2 and R3 is connected to a first input of a comparator 10 via line L1. Signals supplied to the comparator 10 are smoothed by a capacitor C1 connected between L1 and ground and limited by a diode D2 connected between L1 and ground.
- Voltage pulses to be described below are supplied to a second input of comparator 10 via a second line L2.
- a voltage divider formed by resistors R4 and R3 connected between a 5 volt supply rail and earth ensures that a certain minimum voltage is always supplied via line L1 to the first input of the comparator 10.
- R4 and R3 form a voltage divider with the ratio of R4 to R3 being about 10 so that a minimum of 1/2 volt is supplied to the first input of the comparator 10.
- the first input of the comparator mentioned above is preferably the non-inverting input and the second input is preferably the non-inverting input.
- misfiring can be detected by examining the shape of the voltage characteristic.
- the circuit shown in Figure 1 is intended to examine the shape of the primary voltage characteristic.
- the voltages induced in the primary winding are then applied to the circuit of Figure 1 across terminals K1 and K15.
- the transistor T1 together with components D1, R1, R2, R3 detects changes in the voltage induced in the primary and applies them to the comparator 10.
- the pupose of the components R2 and D2 is to protect the comparator 10.
- the voltage induced in the primary in response to spark production is hereinafter referred to as "the spark duration signal".
- Figure 2(a) shows a typical spark duration signal occurring during normal operation of the engine.
- the primary voltage initially increases to a maximum, drops after spark firing at the spark plug to a value which is proportional to the so-called “spark burning voltage” and decays in a damped oscillation after breakdown of the ignition spark.
- the spark For normal operation of the engine the spark must be maintained for a predetermined length of time which is greater than or equal to a "minimum spark duration". If the spark breaks down too quickly the result is misfiring.
- Figure 3(a) illustrates the type of spark duration signal which occurs when there is no spark firing.
- the primary voltage decays immediately in a damped oscillation.
- the amplitude characteristic and frequency of the oscillation depend on the stored energy and also the values of R, L and C of the ignition circuit.
- Figures 2(b) and 3(b) each show the smoothed spark duration signal as applied to the input of comparator 10.
- the smoothed voltages decay to the 5 voltage level supplied via the voltage divider comprising resistors R4 and R3.
- the comparator in this embodiment produces a HIGH output when the voltage at the non-inverting input is greater than the voltage at the inverting input. Thus when there is no voltage induced in the primary of the ignition coil and no voltage at the inverting input, the output of the comparator is at HIGH.
- the voltage pulses supplied to the inverting input of the comparator are generated in response to the ignition point.
- Figures 2(c) and 3(c) each show one such pulse. Each pulse begins at a delay time after the ignition point. The magnitude of the pulses is selected such that during spark maintenance the output from the comparator is at a high level. This is illustrated in Figure 2(d) which shows the output from the comparator during normal operation.
- the duration of the pulses is selected to correspond to the minimum spark duration. Thus, if the spark is not maintained for the minimum spark duration the output from the comparator 10 will switch to a LOW level until the end of the generated pulse as illustrated in Figure 3(d). Thus LOW at the output from the comparator 10 indicates misfiring.
- the pulses may be generated by the microcomputer, in a simple transistorised ignition system they may be generated by a monoflop stage or the like.
- the detection of misfiring can be used in a number of ways.
- An optical or acoustic signal can be provided as a warning to the driver.
- the fuel injection to selected cylinders may be cut out in response to the LOW signal at the comparator.
- the LOW signal may also be used to switch over to an emergency running program to limit the catalyst temperature.
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)
- Combined Controls Of Internal Combustion Engines (AREA)
Description
- This invention relates to the detection of misfiring in spark ignition engines. In engines provided with catalytic converters it is particularly desirable to detect misfiring (for example due to worn spark plugs, defective ignition cable or the like) as soon as it begins to occur because it can lead to overheating or ruining of the catalyst due to the presence of unburnt fuel in the exhaust from the engine.
- Previously the temperature of the catalyst itself has been used as an indication of misfiring. This means that the catalyst has already begun to overheat before misfiring is detected. It would therefore be preferable to detect misfiring before the catalyst overheats. The EP-A-20 069 describes an apparatus for testing an internal combustion engine ignition system, with a detected signal indicative of the voltage in the primary windings of the ignition coil. This signal is compared with a generated reference voltage having a predetermined magnitude and a predetermined duration. When the magnitude of a signal derived from the detected signal falls below the predetermined magnitude of the generated reference voltage after the end of the predetermined duration, a fault condition is indicated.
- According to the present invention misfiring is detected from the voltage characteristic induced in the ignition coil when a spark occurs. When an ignition system is operating normally after sparking the secondary voltage is maintained at a certain level for a certain length of time until the ignition spark breaks down. When the system misfires the secondary and consequently the primary voltage may decay immediately from an initially high voltage or the spark may break down very quickly. Thus the shape of the voltage characteristic can be used to detect misfiring.
- The present invention provides a method of detecting misfiring in an internal combustion engine comprising detecting a signal indicative of the voltage induced in the primary winding of the ignition coil, generating a reference voltage representing normal firing and comparing the detected voltage with the reference voltage. The reference voltage is a pulse having a predetermined magnitude and a predetermined duration and the detected voltage is compared to the reference voltage so as to detect when the magnitude of the detected voltage falls below said predetermined magnitude before the end of the duration.
- An embodiment of the invention will now be described by way of example only and with reference to the accompanying drawings in which:
- Figure 1 is a diagram showing the circuit components used in the present invention;
- Figure 2 shows the voltage versus time at various points in the circuit of Figure 1 during normal engine operation; and
- Figure 3 shows the voltage versus time at various points in the circuit of Figure 1 when the engine misfires.
- Referring firstly to Figure 1, the circuit comprises a transistor T1 whose base is connected to the terminal KL 15 of the ignition coil via resistor R1 and diode D1. The collector of the transistor T1 is connected to ground via resistors R2 and R3. The emitter is connected to a
terminal KL 1. The terminals KL1 and KL15 are the primary terminals of the ignition coil with KL15 on the battery side such that the voltage at KL15 is the battery voltage supplied via the ignition lock. The junction between resistors R2 and R3 is connected to a first input of acomparator 10 via line L1. Signals supplied to thecomparator 10 are smoothed by a capacitor C1 connected between L1 and ground and limited by a diode D2 connected between L1 and ground. Voltage pulses to be described below are supplied to a second input ofcomparator 10 via a second line L2. A voltage divider formed by resistors R4 and R3 connected between a 5 volt supply rail and earth ensures that a certain minimum voltage is always supplied via line L1 to the first input of thecomparator 10. In the illustrated embodiment R4 and R3 form a voltage divider with the ratio of R4 to R3 being about 10 so that a minimum of 1/2 volt is supplied to the first input of thecomparator 10. The first input of the comparator mentioned above is preferably the non-inverting input and the second input is preferably the non-inverting input. - As mentioned above, misfiring can be detected by examining the shape of the voltage characteristic. The circuit shown in Figure 1 is intended to examine the shape of the primary voltage characteristic. The voltages induced in the primary winding are then applied to the circuit of Figure 1 across terminals K1 and K15. The transistor T1 together with components D1, R1, R2, R3 detects changes in the voltage induced in the primary and applies them to the
comparator 10. The pupose of the components R2 and D2 is to protect thecomparator 10. - In operation of the circuit, voltage changes detected by the transistor T1 are fed to the
comparator 10 via resistors R2 and R3 which constitute a voltage divider. In the event of a spark a voltage pulse is fed to the other input of the comparator. The comparator switches between two levels depending on which of its inputs is highest. - The voltage induced in the primary in response to spark production is hereinafter referred to as "the spark duration signal". Figure 2(a) shows a typical spark duration signal occurring during normal operation of the engine. The primary voltage initially increases to a maximum, drops after spark firing at the spark plug to a value which is proportional to the so-called "spark burning voltage" and decays in a damped oscillation after breakdown of the ignition spark.
- For normal operation of the engine the spark must be maintained for a predetermined length of time which is greater than or equal to a "minimum spark duration". If the spark breaks down too quickly the result is misfiring.
- Figure 3(a) illustrates the type of spark duration signal which occurs when there is no spark firing. The primary voltage decays immediately in a damped oscillation. The amplitude characteristic and frequency of the oscillation depend on the stored energy and also the values of R, L and C of the ignition circuit.
- Figures 2(b) and 3(b) each show the smoothed spark duration signal as applied to the input of
comparator 10. The smoothed voltages decay to the 5 voltage level supplied via the voltage divider comprising resistors R4 and R3. The comparator, in this embodiment produces a HIGH output when the voltage at the non-inverting input is greater than the voltage at the inverting input. Thus when there is no voltage induced in the primary of the ignition coil and no voltage at the inverting input, the output of the comparator is at HIGH. - The voltage pulses supplied to the inverting input of the comparator are generated in response to the ignition point. Figures 2(c) and 3(c) each show one such pulse. Each pulse begins at a delay time after the ignition point. The magnitude of the pulses is selected such that during spark maintenance the output from the comparator is at a high level. This is illustrated in Figure 2(d) which shows the output from the comparator during normal operation.
- The duration of the pulses is selected to correspond to the minimum spark duration. Thus, if the spark is not maintained for the minimum spark duration the output from the
comparator 10 will switch to a LOW level until the end of the generated pulse as illustrated in Figure 3(d). Thus LOW at the output from thecomparator 10 indicates misfiring. - In a microprocessor controlled ignition system, the pulses may be generated by the microcomputer, in a simple transistorised ignition system they may be generated by a monoflop stage or the like.
- The detection of misfiring can be used in a number of ways. An optical or acoustic signal can be provided as a warning to the driver. The fuel injection to selected cylinders may be cut out in response to the LOW signal at the comparator. The LOW signal may also be used to switch over to an emergency running program to limit the catalyst temperature.
- The circuit arrangement described above has a number of advantages including the following:
- 1. low hardware expenditure;
- 2. fast fault detection since the cause (misfiring) and not the effect (excessive catalyst temperature) is detected;
- 3. the system is suitable for vehicles with or without (excess air factor) control;
- 4. unlike the methods of the prior art, the fault detection is cylinder-selective, allowing
- a) cylinder-selective engine intervention, for example disconnection of the injection valve of a cylinder with defective ignition
- b) diagnosis of the fault cause.
Claims (3)
- A method of detecting misfiring in an internal combustion engine comprising detecting a signal indicative of the voltage in the primary winding of the ignition coil, generating, in response to ignition, a reference voltage pulse, representing normal firing, having a predetermined magnitude and a predetermined duration and comparing the detected voltage signal with the reference voltage pulse to detect when the magnitude of the detected signal falls below said predetermined magnitude of the reference voltage pulse before the end of the predetermined duration thereby indicating misfiring in the engine.
- A method as claimed in claim 1, in which the detected signal is derived from the primary winding of the ignition coil.
- A method as claimed in claim 1, in which the primary voltage and the reference voltage are compared in a comparator (10).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19883852390 DE3852390T2 (en) | 1988-06-03 | 1988-06-03 | Device for detecting misfires in spark-ignited internal combustion engines. |
EP19880108869 EP0344349B1 (en) | 1988-06-03 | 1988-06-03 | Detecting misfiring in spark ignition engines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19880108869 EP0344349B1 (en) | 1988-06-03 | 1988-06-03 | Detecting misfiring in spark ignition engines |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0344349A1 EP0344349A1 (en) | 1989-12-06 |
EP0344349B1 true EP0344349B1 (en) | 1994-12-07 |
Family
ID=8199024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19880108869 Expired - Lifetime EP0344349B1 (en) | 1988-06-03 | 1988-06-03 | Detecting misfiring in spark ignition engines |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0344349B1 (en) |
DE (1) | DE3852390T2 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3909906A1 (en) * | 1989-03-25 | 1990-09-27 | Bosch Gmbh Robert | CIRCUIT ARRANGEMENT FOR MONITORING A HIGH VOLTAGE IGNITION SYSTEM |
DE3924130A1 (en) * | 1989-07-20 | 1991-01-31 | Bosch Gmbh Robert | DEVICE FOR DETECTING MISSING OR BAD BURNS IN OTTO ENGINES |
DE4116642C2 (en) * | 1990-08-25 | 2000-05-11 | Bosch Gmbh Robert | Ignition system of an internal combustion engine with a monitoring circuit for detecting misfires |
DE4035957A1 (en) * | 1990-11-09 | 1992-05-14 | Bosch Gmbh Robert | METHOD FOR FUNCTION MONITORING OF INTERNAL COMBUSTION ENGINES |
DE4039356C1 (en) * | 1990-12-10 | 1992-07-16 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
DE4127969A1 (en) * | 1991-08-23 | 1993-02-25 | Bosch Gmbh Robert | METHOD FOR DETECTING A CONTACT FROM MEASURING CABLES |
FR2680833B1 (en) * | 1991-08-29 | 1993-11-26 | Renault Regie Nale Usines | METHOD AND DEVICE FOR DETECTING THE FOULING OF A CANDLE. |
FR2688272B1 (en) * | 1992-03-03 | 1995-10-06 | Marelli Autronica | ELECTRONIC IGNITION DEVICE WITH A COIL FOR A CONTROLLED IGNITION ENGINE. |
DE4437480C1 (en) * | 1994-10-20 | 1996-03-21 | Bosch Gmbh Robert | Method for monitoring the function of an internal combustion engine for detecting misfires |
DE19524499B4 (en) * | 1995-07-05 | 2008-11-13 | Robert Bosch Gmbh | Ignition system for an internal combustion engine |
DE19536324A1 (en) * | 1995-09-29 | 1997-04-03 | Bayerische Motoren Werke Ag | Method for testing the ignition system of an internal combustion engine |
FR2752598B1 (en) * | 1996-08-21 | 1998-10-09 | Renault | METHOD AND DEVICE FOR DIAGNOSING THE IGNITION OF A HEAT ENGINE BY MEASURING THE IONIZATION IMPEDANCE |
DE50307122D1 (en) * | 2002-08-05 | 2007-06-06 | Thyssenkrupp Krause Gmbh | Ignition coil test circuit and method for testing an ignition coil |
FR2919901B1 (en) * | 2007-08-08 | 2010-02-26 | Renault Sas | RADIOFREQUENCY PLASMA GENERATION DEVICE |
DE102011017569A1 (en) | 2011-04-27 | 2012-10-31 | Robert Bosch Gmbh | Method for recognizing secondary idling of ignition coil during operation of ignition system of combustion engine of motor car, involves detecting error if parameter of cut-off voltage peak exceeds threshold value |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3065662D1 (en) * | 1979-05-25 | 1983-12-29 | Lucas Ind Plc | Apparatus for use in testing an internal combustion engine ignition system |
JPS5786569A (en) * | 1980-11-18 | 1982-05-29 | Toshiba Corp | Ignition detective circuit |
US4661778A (en) * | 1984-09-04 | 1987-04-28 | Ford Motor Company | Ignition diagnostic monitor |
DE3629824A1 (en) * | 1986-09-02 | 1988-03-10 | Telefunken Electronic Gmbh | Electronic circuit for the detection of misfiring |
-
1988
- 1988-06-03 EP EP19880108869 patent/EP0344349B1/en not_active Expired - Lifetime
- 1988-06-03 DE DE19883852390 patent/DE3852390T2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE3852390T2 (en) | 1995-05-18 |
DE3852390D1 (en) | 1995-01-19 |
EP0344349A1 (en) | 1989-12-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4918389A (en) | Detecting misfiring in spark ignition engines | |
EP0344349B1 (en) | Detecting misfiring in spark ignition engines | |
US4684896A (en) | Testing method for ignition systems of internal combustion engines in motor vehicles | |
EP0422038B1 (en) | Ignition misfire detector | |
US5283527A (en) | Methods and apparatus for detecting short circuited secondary coil winding via monitoring primary coil winding | |
US5119783A (en) | Control apparatus for an internal combustion engine | |
US5017874A (en) | Method and apparatus for detecting and indicating anomalies in the operation of the ignition systems of internal combustion engines | |
US5207200A (en) | Misfiring sensing apparatus for an internal combustion engine | |
US5785020A (en) | Combustion state detecting apparatus for an internal-combustion engine | |
JP2929489B2 (en) | Method and apparatus for monitoring combustion in a spark ignition internal combustion engine | |
US5019779A (en) | Ignition apparatus for an internal combustion engine | |
US5507264A (en) | Ignition system for internal combustion engines with misfiring detection by comparing the same ignition coil | |
JP3625835B2 (en) | Function monitoring method for misfire identification in internal combustion engines | |
US5821754A (en) | Ignition system for an internal combustion engine | |
JP3163585B2 (en) | Misfire detection device for internal combustion engine | |
US6211680B1 (en) | Process and apparatus for recognizing ignition failures in an internal-combustion engine having two spark plugs per cylinder | |
US5446385A (en) | Ignition system for internal combustion engines | |
GB2250347A (en) | Ignition system and/or injection system for internal combustion engines | |
US5294888A (en) | Device for detecting misfire of an internal combustion engine by comparing voltage waveforms associated with ignition system | |
US5490489A (en) | Ignition system for an internal combustion engine | |
JP2665794B2 (en) | Ignition device for internal combustion engine | |
JPH05312094A (en) | Combustiveness detector of gasoline engine | |
US6357428B1 (en) | Process and apparatus for determining the breakdown voltage during the ignition of an internal-combustion engine | |
JP2688672B2 (en) | Misfire detection device for internal combustion engine | |
JP2523255B2 (en) | Secondary voltage detector for gasoline engine |
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 |
Kind code of ref document: A1 Designated state(s): DE FR GB IT SE |
|
17P | Request for examination filed |
Effective date: 19900516 |
|
RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ROBERT BOSCH GMBH |
|
17Q | First examination report despatched |
Effective date: 19920703 |
|
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 |
|
ET | Fr: translation filed | ||
REF | Corresponds to: |
Ref document number: 3852390 Country of ref document: DE Date of ref document: 19950119 |
|
ITF | It: translation for a ep patent filed |
Owner name: STUDIO JAUMANN |
|
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 | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20040514 Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20040618 Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20040623 Year of fee payment: 17 |
|
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;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050603 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050603 |
|
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 NON-PAYMENT OF DUE FEES Effective date: 20050604 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20050816 Year of fee payment: 18 |
|
EUG | Se: european patent has lapsed | ||
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: 20060228 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20050603 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20060228 |
|
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: 20070103 |