EP1595125A1 - Method for detecting failed combustion in an internal combustion engine by a combination of combustion irregularity indices - Google Patents
Method for detecting failed combustion in an internal combustion engine by a combination of combustion irregularity indicesInfo
- Publication number
- EP1595125A1 EP1595125A1 EP04710015A EP04710015A EP1595125A1 EP 1595125 A1 EP1595125 A1 EP 1595125A1 EP 04710015 A EP04710015 A EP 04710015A EP 04710015 A EP04710015 A EP 04710015A EP 1595125 A1 EP1595125 A1 EP 1595125A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- index
- value
- combustion
- calculated
- 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.)
- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 239000000446 fuel Substances 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 14
- 239000007800 oxidant agent Substances 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000006870 function Effects 0.000 description 12
- 238000004364 calculation method Methods 0.000 description 8
- 238000003745 diagnosis Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 238000002405 diagnostic procedure Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/11—Testing internal-combustion engines by detecting misfire
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S123/00—Internal-combustion engines
Definitions
- the present invention relates to a method of detecting misfire (or partial combustion) of an air / fuel mixture in the cylinders of an internal combustion engine, in particular an engine propelling a motor vehicle, this method providing that, preferably during each combustion phase of this mixture in any one of the engine cylinders, an index representative of the engine operating irregularities is calculated.
- Combustion irregularities in an internal combustion engine are useful to diagnose because they reveal various disorders that can affect engine operation.
- the FR-A-2 patent is known. 689 934 such a method, intended more particularly for such a diagnosis during an operation of the engine at medium and high revs.
- sets of time differences ⁇ t are measured, separating predetermined angular positions of the crankshaft, and then, from a linear combination of time differences, is calculated of the whole, a "critical parameter", or "index”, representative of the variations in the engine rotation speed (crankshaft) during this combustion phase and this index is compared to a fault threshold to diagnose the possible occurrence of a misfire.
- FR-A-2 718 489 Also known from FR-A-2 718 489 is a method of the type described in FR-A-2 689 934, but improved so as to eliminate diagnostic disturbances by variations in the geometry of a "target" used to identify the aforementioned time differences.
- Processes of the same type are also known, modified so as to prevent a "recovery" of forces, resulting from the movement of a vehicle powered by the engine on a surface of irregular geometry, from disturbing the diagnosis, and this without using a sensor dedicated to the detection of such efforts.
- the object of the present invention is therefore to provide a method of detecting misfires which does not suffer from the faults mentioned above and which, in particular, provides "universal" detection of combustion faults, whatever the field of engine operation or the type of misfire to be diagnosed, or whatever the causes likely to disturb the diagnosis to be made.
- another characteristic of the invention recommends that the elementary indices (li, l,) are each adapted to increase the signal-to-noise ratio of the detection of operating irregularities of the motor in the operating range ( ⁇ C, ⁇ N) associated with it.
- the estimated value of I (t ⁇ ⁇ t) is a value filtered in an electronic data filter.
- the estimated value of I (t ⁇ ⁇ t) is an averaged value corresponding to the average value of several current values of I (t) at several times different from time (t) for the calculation of the index I (t), the values deviating too much from the expected value being either sorted or weighted so as not to affect the mean.
- cycle corresponds to the time interval separating two top active dead centers (P HA) of a cylinder, a “top active dead center” corresponding to the angular position of the crankshaft which precedes the gas expansion, i.e. the minimum distance between the piston and the top of the cylinder head of this engine.
- FIG. 1 is a flow diagram schematically showing an example of implementation of a detection method according to the invention.
- the method according to the invention uses signals conventionally delivered by a position sensor 1, with magnetic reluctance for example, sensitive to the movement of the teeth of a toothed wheel 2, or target, fixed on the output shaft of an internal combustion engine (not shown).
- the angular position sensor 1 is thus subject to a fixed part of the engine opposite the wheel 2 which is therefore secured to the crankshaft.
- the wheel carries a series of identical regularly spaced teeth and a singular tooth (for example, of width equal to three common teeth) whose absolute position is perfectly known with respect to the crankshaft.
- This sensor delivers a signal containing, at each revolution of the crankshaft, data on the angular position corresponding to the passage of each current tooth and absolute position information corresponding to the passage of the singular tooth.
- These data can consist of a series of pulses, after shaping in electronic means of processing associated with the sensor.
- the absolute position data make it possible to know the position of the active high dead centers.
- a counter receives the signal Se and delivers values of time difference A, ⁇ t 2 , ... by a measurement of the times separating the passage of predetermined teeth in front of the sensor. These time differences are stored in a memory of the computer provided on the vehicle and processed by the latter. These calculation means are programmed to group the time difference values into sets of samples ⁇ ti, ⁇ t 2 , ... from which the critical parameter is calculated.
- this critical parameter or index
- this index is representative of the variations in the instantaneous speed of rotation of the engine at the instant of the chosen cycle (typically, combustion), that is to say at a reference instant of the combustion phase, preferably with respect to the average speed between two consecutive high dead centers.
- the calculated index takes the form of a linear combination of time differences ⁇ t, (acquired in step 4) separating predetermined angular positions of the engine crankshaft identified by means of the signal delivered by the sensor 1, preferably during the same engine combustion phase, or consecutive phases.
- the index may for example correspond to an estimated value of the engine torque at the instant considered, in particular during combustion (such as PMHA), at a given cycle.
- step 4 a series of time difference measurements, for example angularly distributed on either side of a reference position, is carried out in order to obtain the 'aforementioned set of samples ⁇ t, on said window, after which, for each set of samples a linear combination of these values ⁇ t, measured is performed, so as to obtain the index concerned.
- a specific instant of combustion is monitored by determining, by simple linear combinations, a parameter representative of the variations in instantaneous speed at this instant.
- an index I (t) representative of engine operating irregularities is used, a linear combination of at least two indices, for example of "elementary" indices I, (t), such as (t), l 2 (t), l (t), each adapted to a particular operating domain of the engine, defined by intervals of variations particular ⁇ C of the load C, and ⁇ N of the speed N of this engine.
- This adaptation aims to maximize the signal / noise ratio of the detection to operate, in the engine operating areas associated with the indices l 1 (t), l 2 (t), l 3 (t), respectively.
- step 5 of the flow diagram of FIG. 1 while the vehicle is in current use, different indices (t), l 2 (t), l 3 (t), etc. are calculated, each adapted to one of the fields of engine operation, this adaptation taking place, for example, by the choice of a particular series of weighting coefficients, for the measured intervals ⁇ t.
- These coefficients weight, in the expression of I (t), the associated indices as a function of the greater or lesser proximity to the current operating point (C, N) of the engine, with respect to the operating domain ( ⁇ C , ⁇ N) associated with each elementary index.
- the load can be measured by any conventional means (vacuum in the intake manifold, air flow, etc.), while the engine speed can be taken at each revolution of the engine by traditional means.
- E (t) I (t) - ⁇ ⁇ (t ⁇ ⁇ t)
- I (t ⁇ ⁇ t) is an estimated value filtered from the index I (t) at an instant (t ⁇ ⁇ t) different from (t)
- I (t) the current value (current at time t) of I, calculated in step 6.
- the function E (t) provides an instantaneous difference between two real values (ie say existing while the vehicle is in operation, and not on bench test as during the step of developing the data contained in table 7).
- the population of the values taken into account includes a population with misfires and without misfires, thus making it possible to obtain a real image of the operation of the engine, while the vehicle is traveling.
- the calculated values of I (t) and I (t ⁇ ⁇ t) will preferably correspond to values existing at relatively close operating instants, that is to say preferably belonging either to the same engine operating cycle ( typically a four-stroke cycle), or to cycles distant from each other by no more than five consecutive cycles, the figure of five cycles having been chosen as illustrating this relative proximity in time between the values taken into account, so as to avoid overloading the computer memory and possibly making the system erratic, taking into account engine operating changes.
- Using a filtered value can also allow exemption from certain erratic data. It is possible in particular to eliminate said erratic values or else weighted them so as to make their influence negligible.
- table 7 (memory unit) therefore established on a bench allows the computer on board the vehicle not only to calculate the index I
- ⁇ , ⁇ and ⁇ are the aforementioned relevance coefficients, a function of the load C and of the engine speed N during its bench test, ⁇ l 2 , I3 being three values of the index I established at different instants chosen during the operation of the engine under test.
- the value of E (t) is compared with the threshold value S, which is therefore a direct function of the speed N and the load C of the engine.
- the threshold S will be established so that an overshooting of its value by E (t) corresponds, at the instant of this overshooting, to the occurrence of a misfire (RC), thus diagnosed.
- the memory unit 7 may moreover contain a map of thresholds, established on a bench, for different (each) engine speed (s) and load (s) of the operating range of this engine. This mapping could therefore have been defined beforehand by artificially causing a combustion fault at predefined speeds and loads, by carrying out the aforementioned measurements of time differences ( ⁇ ti) and by calculating the corresponding critical index or indices, and by storing in addition a part of these indices as default threshold (s).
- the current engine speed and the average current load applied are then detected and the corresponding fault threshold is extracted from memory unit 7 in order to make the comparison mentioned above.
- the on-board calculation means programmed to determine the speed and the load of the engine from data received from the pulse counter associated with the sensor 1 and a sensor inlet pressure for example, can extract from the memory of the table 7 the threshold corresponding to the speed and the load and compare the index to this threshold (step 10).
- fault information can be delivered to alert means to initiate the action to be executed (alarm, action on an injector, etc.).
- this method avoids an auxiliary sensor to describe the condition of the roadway, making it possible to guarantee detection in accordance with current standards.
- each detection from the selected base index can be calibrated once and for all for a fixed speed (during the bench test), regardless of the final weighting linked to the dynamics of the vehicle in operation.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Data Mining & Analysis (AREA)
- Mechanical Engineering (AREA)
- Theoretical Computer Science (AREA)
- Algebra (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Testing Of Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0302056 | 2003-02-20 | ||
FR0302056A FR2851611B1 (en) | 2003-02-20 | 2003-02-20 | METHOD FOR DETECTING COMBUSTION RATES IN AN INTERNAL COMBUSTION ENGINE BY COMBINING COMBUSTION IRREGULARITY INDICES |
PCT/EP2004/001249 WO2004074806A1 (en) | 2003-02-20 | 2004-02-11 | Method for detecting failed combustion in an internal combustion engine by a combination of combustion irregularity indices |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1595125A1 true EP1595125A1 (en) | 2005-11-16 |
Family
ID=32799436
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04710015A Withdrawn EP1595125A1 (en) | 2003-02-20 | 2004-02-11 | Method for detecting failed combustion in an internal combustion engine by a combination of combustion irregularity indices |
Country Status (7)
Country | Link |
---|---|
US (1) | US7203592B2 (en) |
EP (1) | EP1595125A1 (en) |
JP (1) | JP4340285B2 (en) |
KR (1) | KR20050103298A (en) |
FR (1) | FR2851611B1 (en) |
MX (1) | MXPA05008895A (en) |
WO (1) | WO2004074806A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2930347A1 (en) * | 2008-04-30 | 2009-10-23 | Continental Automotive France | Piezoelectric acceleration sensor for detecting e.g. ping, of internal combustion engine, has piezoelectric sensing element that is confound with piezoelectric actuator element of fuel injector of engine and in contact with block of engine |
DE102011089370A1 (en) * | 2011-12-21 | 2013-06-27 | Robert Bosch Gmbh | Method and apparatus for operating a cold start emission control of an internal combustion engine |
CN111140354B (en) * | 2019-12-20 | 2021-10-08 | 潍柴动力股份有限公司 | Method and device for detecting fire of whole vehicle |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2689934B1 (en) * | 1992-04-10 | 1994-06-17 | Siemens Automotive Sa | METHOD AND DEVICE FOR DETECTING THE COMBUSTION IRREGULARITIES OF AN ENGINE, PARTICULARLY MEDIUM AND HIGH SPEED, APPLICATION TO A CONTROL SYSTEM OF AN INJECTION ENGINE. |
JP2807738B2 (en) * | 1993-10-15 | 1998-10-08 | 本田技研工業株式会社 | Device for detecting combustion state of internal combustion engine |
FR2718489B1 (en) | 1994-04-12 | 1996-05-03 | Siemens Automotive Sa | Method for detecting combustion irregularities in an internal combustion engine. |
US5821412A (en) * | 1994-08-09 | 1998-10-13 | Ford Global Technologies, Inc. | Apparatus and method for processing engine measurements |
CN1137378C (en) * | 1995-12-21 | 2004-02-04 | 西门子公司 | Process for detecting cyclical fluctuations in combustion in internal combustion engine |
IT1298944B1 (en) * | 1998-02-24 | 2000-02-07 | Automobili Lamborghini Spa | PROCEDURE FOR DETECTING FAILED EXPLOSION IN AN INTERNAL COMBUSTION ENGINE AND SYSTEM THAT PERFORMS THIS |
FR2794493B1 (en) * | 1999-06-04 | 2001-10-05 | Renault | METHOD FOR DETECTING A DISTURBANCE OF THE TORQUE OBSERVED ON THE OUTPUT SHAFT OF AN INTERNAL COMBUSTION ENGINE PROPELLING A MOTOR VEHICLE |
DE19945811A1 (en) * | 1999-09-24 | 2001-03-29 | Bosch Gmbh Robert | Misfire detection method |
FR2851612B1 (en) * | 2003-02-20 | 2009-05-22 | Siemens Vdo Automotive | METHOD FOR DETECTING COMBUSTION RATES OF AN INTERNAL COMBUSTION ENGINE BY FILTERING THE VARIATIONS OF THE COMBUSTION IRREGULARITY INDEX |
-
2003
- 2003-02-20 FR FR0302056A patent/FR2851611B1/en not_active Expired - Lifetime
-
2004
- 2004-02-11 JP JP2006501801A patent/JP4340285B2/en not_active Expired - Fee Related
- 2004-02-11 US US10/546,534 patent/US7203592B2/en not_active Expired - Fee Related
- 2004-02-11 KR KR1020057015393A patent/KR20050103298A/en not_active Application Discontinuation
- 2004-02-11 WO PCT/EP2004/001249 patent/WO2004074806A1/en not_active Application Discontinuation
- 2004-02-11 MX MXPA05008895A patent/MXPA05008895A/en active IP Right Grant
- 2004-02-11 EP EP04710015A patent/EP1595125A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2004074806A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2006518826A (en) | 2006-08-17 |
WO2004074806A1 (en) | 2004-09-02 |
JP4340285B2 (en) | 2009-10-07 |
US7203592B2 (en) | 2007-04-10 |
MXPA05008895A (en) | 2006-03-09 |
US20060167614A1 (en) | 2006-07-27 |
FR2851611A1 (en) | 2004-08-27 |
FR2851611B1 (en) | 2005-04-08 |
KR20050103298A (en) | 2005-10-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1548418B9 (en) | Calibration system of the pressure measuring chain in a automotive vehicle Diesel engine cylinder | |
EP3785006B1 (en) | Method and device for monitoring a gear system | |
FR2689934A1 (en) | Method and device for detecting combustion irregularities of an engine, in particular at medium and high revs, application to a control system of an injection engine. | |
WO2007147484A1 (en) | Method for detecting a misfire and corresponding device | |
FR2754569A1 (en) | METHOD FOR DETECTING COMBUSTION RATES BY OPERATING VARIATIONS IN ROTATION SPEED | |
EP2232035B1 (en) | METHOD FOR PRODUCING A SYNCHRONIZATION SIGNAL for an INTERNAL COMBUSTION ENGINE | |
EP0894254B1 (en) | Method for calculating the torque of an internal combustion engine | |
FR2851612A1 (en) | Combustion rate detection method for motor vehicle, involves calculating value that expresses time distance between current value of index representative of irregularities of operation in engine and estimated reference value | |
WO2004074806A1 (en) | Method for detecting failed combustion in an internal combustion engine by a combination of combustion irregularity indices | |
WO1994016209A1 (en) | Process and apparatus for the detection of misfiring in a spark-ignition internal combustion engine | |
EP1731788B1 (en) | Method and device for monitoring a clutch slip in a transmission with an acyclic torque source | |
EP2480776B1 (en) | Prediction of engine rotation speed during the end of rotation and application of the prediction for an estimation of crankcase stop position | |
EP1607605B1 (en) | Pressure estimating system in the exhaust manifold of a diesel engine and method for calibrating said system | |
EP1009987B1 (en) | Method for detecting an abnormal disturbance of an internal combustion engine torque | |
FR2734326A1 (en) | METHOD FOR DETECTING RATES ON IGNITION OF A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE | |
FR2827954A1 (en) | METHOD FOR CORRECTING THE SIGNAL OF A CAMSHAFT POSITION SENSOR | |
EP0128817B1 (en) | Process for adjusting and measuring the ageing of an internal-combustion engine | |
EP0755482B1 (en) | Method for sensing faulty combustion in an internal combustion engine | |
FR2818737A1 (en) | METHOD FOR DETECTING A SINGULARITY IN PARTICULAR OF A REFERENCE MARK OF A PHONE DISC ASSOCIATED WITH THE SHAFT OF AN INTERNAL COMBUSTION ENGINE | |
EP2641073B1 (en) | Method for detecting combustion defects in an internal combustion engine | |
EP1540296B1 (en) | Method for fault detection in an internal combustion engine | |
EP1936169A2 (en) | Method for estimating the timing of the teeth of an engine timing disk | |
EP1217354B1 (en) | Method for evaluating the torque of a combustion engine | |
EP1624170B1 (en) | Method and apparatus for monitoring calibration of an in cylinder pressure data acquisition chain | |
FR2992359A1 (en) | Method for detecting fault of combustion diesel engine system of motor car, involves estimating torque value from combustion of amplitude values, and comparing estimated amplitude values with threshold value to detect any engine failures |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20050728 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
DAX | Request for extension of the european patent (deleted) | ||
RBV | Designated contracting states (corrected) |
Designated state(s): DE GB IT SE |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20070823 |