EP1527265A1 - Method and device for controlling an actuator - Google Patents
Method and device for controlling an actuatorInfo
- Publication number
- EP1527265A1 EP1527265A1 EP03787610A EP03787610A EP1527265A1 EP 1527265 A1 EP1527265 A1 EP 1527265A1 EP 03787610 A EP03787610 A EP 03787610A EP 03787610 A EP03787610 A EP 03787610A EP 1527265 A1 EP1527265 A1 EP 1527265A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- injection
- actuator
- partial injection
- fuel
- 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- Withdrawn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
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000002347 injection Methods 0.000 claims abstract description 58
- 239000007924 injection Substances 0.000 claims abstract description 58
- 239000000446 fuel Substances 0.000 claims abstract description 25
- 238000002485 combustion reaction Methods 0.000 claims abstract description 6
- 230000001419 dependent effect Effects 0.000 claims abstract description 6
- 238000010586 diagram Methods 0.000 description 15
- 238000012937 correction Methods 0.000 description 11
- 230000004913 activation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2409—Addressing techniques specially adapted therefor
- F02D41/2422—Selective use of one or more tables
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
- F02D2200/0604—Estimation of fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0606—Fuel temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/04—Fuel pressure pulsation in common rails
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the invention relates to a method and a device for controlling an actuator L5 according to the preambles of the independent claims.
- EP 1 138 904 discloses a method and a device for controlling a piezo actuator. Such actuators are preferably used to control the injection of fuel into an internal combustion engine. The start of control and the duration
- control determines the start and duration of the fuel metering.
- the voltage value at which the actuator opens and / or closes depends on various operating parameters, such as the fuel pressure. It is therefore provided in the prior art that the voltage value depends on the temperature and the fuel pressure.
- injector supply line induces a pressure wave.
- the subsequent main injection leads to a pressure increase or a pressure decrease. If the constant injection duration of the main injection is assumed, the amount of fuel injected thus changes.
- DE 197 12 143 provides that a correction value for correcting the pressure value is determined on the basis of the distance between the pre-injection and main injection and the amount of fuel metered in during pre-injection. The actual activation duration is then calculated on the basis of this corrected pressure value. This procedure compensates for the influence of the rail pressure change due to the pressure wave via a change in the activation duration of the main injection.
- the voltage value required for this depends on the rail pressure.
- the value of the voltage is selected such that it is sufficient to open the control valve even at the maximum possible rail pressure.
- Such a procedure is disadvantageous because it causes unnecessary energy losses in the control unit, since the increased voltage is also provided when it is not required. Furthermore, a higher voltage than necessary causes a greater force of the control valve and thus increased wear.
- the voltage value with which the injector is controlled depends on the distance between a first partial injection and a second partial injection, the energy and loss line balance can be improved, the wear on the injector reduced and safe opening and holding of the control valve guaranteed.
- a control unit 100 applies different power to an output stage 110 Signals that determine the control of the injector. These include signals that determine the start and duration or the start and end of fuel metering. Furthermore, the control unit 100 applies a signal TVE to a first specification 120, which characterizes the distance between a first and a second injection. Furthermore, the control unit 100 applies a signal QVE to a second specification 125 that characterizes the amount of fuel that is metered in during the first partial injection. In an alternative embodiment, signal QVE is provided by acquisition 122. A first connection point 130 is applied to the output signal of the first specification 120 and a second connection point 135 is applied to the output signal of the second specification 125.
- a temperature sensor 140 applies a signal TK to a characteristic curve 145, which in particular corresponds to the fuel temperature.
- the output signal of the pressure sensor 160 also reaches the characteristic curve 145, which is then designed as a characteristic diagram.
- the characteristic curve 145 acts on the first
- Link point 135 and this the second link point 130 with a signal.
- the first connection point 130 applies a signal to a characteristic diagram 150.
- node 130 acts on another
- Link point 132 This further link point 132 then applies a signal to the characteristic diagram 150.
- the output signal of a characteristic curve 121, to which the pressure signal P of the pressure sensor 160 is supplied, is at the second input of the node 132.
- connection point 130 and / or the connection point 132 loads a characteristic diagram 151 with a signal.
- the output signal of the characteristic diagram 151 reaches the connection point 190 via a connection point 191.
- the output signal of the characteristic diagram 150 is present at the second input of the connection point 191. Only the pressure signal P is then preferably supplied to this characteristic diagram.
- a pressure signal P is present at the second input of the characteristic diagram 150 and is provided by a pressure sensor 160.
- the output signal TA of a further temperature sensor 170 arrives at a second characteristic diagram 180 at the second one Input the output signal of the first map 150 is present.
- the output signal of the first map 150 and the second map 180 is applied to a fourth node 190. This in turn applies a size to the output stage 1 10.
- the second specification 125 and thus the connection point 135 can be omitted.
- the output signal of characteristic curve 145 goes directly to node 130.
- Output signal of node 130 is applied to a third node 195, the signal P is present at the second input.
- the output signal of the connection point 195 arrives at the characteristic diagram 150, which can then advantageously be designed as a characteristic curve.
- the sensors 140, 160 and 170 can both be designed as sensors that directly detect the corresponding signals. It is particularly advantageous if not the direct signals, but rather processed, in particular mean values or variables derived from other variables are used. Furthermore, substitute values can be taken into account for the variables that characterize the corresponding variables or similar ones
- the temperature of the actuator TA can be replaced by the value of the fuel temperature that is measured directly in front of the actuator.
- the effects of the pressure wave, which are caused by the first partial injection, on the rail pressure and thus on the required actuator voltage are taken into account. This is done by correcting the mean wheel pressure P with the change in the wheel pressure caused by the pressure wave.
- the change in the wheel pressure P depends on the distance TVE from the end of the first partial injection and the start of the second partial injection, as well as on the
- Fuel temperature TK which is preferably detected by means of the sensor 140.
- a value is stored in the first characteristic curve 145, which takes into account the dependence of the pressure wave on the viscosity.
- the characteristic curve 145 also takes into account the dependence of the pressure wave on the Rail pressure P.
- a value is stored in the first specification 120, which takes into account the dependence of the pressure wave on the distance between the first and second partial injection. In the second specification the dependence of the correction value on the
- the temperature-dependent factor stored in characteristic curve 145 is corrected in node 130 and possibly 135. It is particularly advantageous if, starting from the rail pressure P, a further correction factor is specified, which takes into account that the start amplitude of the pressure wave depends on the rail pressure P.
- the voltage value dependent on this value and the rail pressure P is stored in the characteristic diagram 150.
- Actuator temperature TA and the rail pressure-dependent correction factor, which is stored in map 180, are corrected again.
- the voltage is stored in the characteristic diagram 150 as a function of the pressure P.
- the pressure signal P is corrected in the third connection point 195 depending on the fuel temperature TK, the distance TVE between the first and second partial injection and the fuel quantity QVE injected during the first partial injection.
- This link in node 195 is preferably additive.
- the first specification 120 takes into account that the end of the first partial injection causes the
- the rail pressure actually present at the start of the second partial injection ie the pressure increase or the pressure reduction, is therefore dependent on the distance from the end of the first to the start of the second partial injection.
- the characteristic curve 145 takes into account the influence, because the fuel temperature TK has on the viscosity and thus on the speed of propagation of the pressure wave.
- the Specification 125 takes into account the influence that the injection quantity of the preceding partial injection has on the amplitude of the pressure wave.
- another variable that characterizes the injected fuel quantity can also be used.
- One such variable is the activation duration.
- the electrical control duration the distance between the start and end of the
- Control of the actuator corresponds, and / or the hydraulic control duration, which corresponds to the distance between the opening and closing of the control element and / or a control valve, are used.
- Map 150 stores the actuator voltage depending on the rail pressure and the corrected output signal of the characteristic curve 145.
- the characteristic 151 specifies a correction value for the actuator voltage based on the corrected output signal of the characteristic 145. This means that a correction voltage is calculated on the basis of the calculated pressure amplitude.
- the calculation of the correction value that describes the pressure wave of the wheel pressure is described in more detail below.
- the first specification 120 describes the behavior of the pressure wave for a specific injector and associated components under reference conditions. A certain are used as reference conditions
- Fuel temperature, fuel quantity and rail pressure assumed. This means that in the first specification 120 a basic value for the pressure amplitude at the time of the start of the second partial injection is stored as a function of the time interval TVE of the two partial injections. Deviations from the reference conditions are taken into account through various corrections.
- the temperature TK of the fuel and the rail pressure P influence the speed of sound and thus the propagation of the pressure wave, in particular the frequency of the pressure wave. This effect is taken into account by a corresponding factor that is provided by the characteristic curve 145.
- the pressure wave arises from a superposition of a partial pressure wave at the beginning and at the end of the first partial injection.
- the phase shift between these two partial pressure waves and thus the resulting pressure wave depends on the hydraulic duration of the first partial injection from.
- this hydraulic duration of the first partial injection is not known, which is why the electrical control duration or another variable characterizing the injected fuel quantity is used as the variable. This correction is determined in the specification 125.
- the start amplitude of the pressure wave essentially depends on the rail pressure P. This influence is taken into account by the characteristic curve 121.
- the corrected basic value of the pressure amplitude corresponds to the deviation of the pressure from the measured rail pressure P on the basis of the pressure wave at the time of the start of the second partial injection as a function of the distance between the two partial injections and the further correction variables.
- the basic value for the pressure amplitude corrected in this way can, as a function of the configuration for correcting the pressure signal P in the node 195
- the characteristic diagram 150 specifies the actuator voltage as a function of the pressure P and the corrected basic value of the pressure amplitude.
- the characteristic map specifies a correction value for the actuator voltage depending on the corrected basic value of the pressure amplitude.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10234847 | 2002-07-31 | ||
DE10234847 | 2002-07-31 | ||
DE10321999A DE10321999A1 (en) | 2002-07-31 | 2003-05-16 | Actuator drive method, especially for piezoactuator, involves using control voltage dependent on internal combustion engine operating parameter(s), e.g. interval between two partial injections |
DE10321999 | 2003-05-16 | ||
PCT/DE2003/002133 WO2004016927A1 (en) | 2002-07-31 | 2003-06-26 | Method and device for controlling an actuator |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1527265A1 true EP1527265A1 (en) | 2005-05-04 |
Family
ID=31889087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03787610A Withdrawn EP1527265A1 (en) | 2002-07-31 | 2003-06-26 | Method and device for controlling an actuator |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1527265A1 (en) |
JP (1) | JP2005534862A (en) |
CN (1) | CN100360783C (en) |
DE (1) | DE10321999A1 (en) |
WO (1) | WO2004016927A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004027291B4 (en) * | 2004-06-04 | 2009-11-26 | Continental Automotive Gmbh | Method and device for controlling a valve |
DE102004052238B4 (en) * | 2004-10-27 | 2007-03-29 | Vw Mechatronic Gmbh & Co. Kg | Method for driving a piezoelectric actuator during a starting phase of an internal combustion engine and device therefor |
DE102005036190A1 (en) * | 2005-08-02 | 2007-02-08 | Robert Bosch Gmbh | Method and device for controlling an injection system of an internal combustion engine |
JP4479764B2 (en) * | 2007-08-31 | 2010-06-09 | 株式会社デンソー | Fuel injection control device and fuel injection system using the same |
DE102010030545B4 (en) * | 2010-06-25 | 2016-12-08 | Continental Automotive Gmbh | Method for controlling a fuel injection system of an internal combustion engine |
FR2990998B1 (en) * | 2012-05-23 | 2016-02-26 | Continental Automotive France | METHOD FOR CONTROLLING AT LEAST ONE PIEZOELECTRIC FUEL INJECTOR ACTUATOR OF AN INTERNAL COMBUSTION ENGINE |
JP6981173B2 (en) | 2017-10-24 | 2021-12-15 | 株式会社デンソー | Fuel injection control device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19903555A1 (en) * | 1999-01-29 | 2000-08-10 | Daimler Chrysler Ag | Device for controlling a piezo element injection valve |
DE10002270C1 (en) * | 2000-01-20 | 2001-06-28 | Bosch Gmbh Robert | Valve for controlling liquids has electronic control unit that defines piezoelectric valve element actuating unit drive voltage depending on leakage loss in low pressure region |
EP1139448A1 (en) * | 2000-04-01 | 2001-10-04 | Robert Bosch GmbH | Method and apparatus for regulating voltages and voltage gradients for driving piezoelectric elements |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19712143C2 (en) * | 1997-03-22 | 2002-03-28 | Bosch Gmbh Robert | Method and device for controlling an internal combustion engine |
DE19937148B4 (en) * | 1999-08-06 | 2012-12-27 | Robert Bosch Gmbh | Method for determining the fuel injection quantities |
DE10014737A1 (en) * | 2000-03-24 | 2001-10-11 | Bosch Gmbh Robert | Method for determining the rail pressure of an injection valve with a piezoelectric actuator |
EP1138904B1 (en) * | 2000-04-01 | 2005-09-14 | Robert Bosch GmbH | Method and apparatus for charging a piezoelectric element |
JP4588971B2 (en) * | 2000-07-18 | 2010-12-01 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Method and apparatus for controlling an internal combustion engine |
JP4239401B2 (en) * | 2000-11-30 | 2009-03-18 | 株式会社デンソー | Fuel injection device for internal combustion engine |
-
2003
- 2003-05-16 DE DE10321999A patent/DE10321999A1/en not_active Withdrawn
- 2003-06-26 CN CNB038033984A patent/CN100360783C/en not_active Expired - Fee Related
- 2003-06-26 JP JP2004528329A patent/JP2005534862A/en active Pending
- 2003-06-26 EP EP03787610A patent/EP1527265A1/en not_active Withdrawn
- 2003-06-26 WO PCT/DE2003/002133 patent/WO2004016927A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19903555A1 (en) * | 1999-01-29 | 2000-08-10 | Daimler Chrysler Ag | Device for controlling a piezo element injection valve |
DE10002270C1 (en) * | 2000-01-20 | 2001-06-28 | Bosch Gmbh Robert | Valve for controlling liquids has electronic control unit that defines piezoelectric valve element actuating unit drive voltage depending on leakage loss in low pressure region |
EP1139448A1 (en) * | 2000-04-01 | 2001-10-04 | Robert Bosch GmbH | Method and apparatus for regulating voltages and voltage gradients for driving piezoelectric elements |
Non-Patent Citations (1)
Title |
---|
See also references of WO2004016927A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1628211A (en) | 2005-06-15 |
CN100360783C (en) | 2008-01-09 |
JP2005534862A (en) | 2005-11-17 |
WO2004016927A1 (en) | 2004-02-26 |
DE10321999A1 (en) | 2004-02-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102006023468B3 (en) | Fuel injection valve controlling method for use in e.g. gasoline engine, involves correcting controlling of selected fuel injection valve by correction factor, and using small amount of fuel to be detected for test injection | |
DE102011007393B3 (en) | Method for detecting a nozzle chamber pressure in an injector and injection system | |
DE102007019099B4 (en) | Method and device for calibrating fuel injectors | |
EP2297444B1 (en) | Method and device for the pressure wave compensation of consecutive injections in an injection system of an internal combustion engine | |
DE102005039757A1 (en) | Diesel-internal combustion engine operating method, involves determining drift of impact sound sensors from temporal change of value compared to another value, where values depend on pressure distribution in one of combustion chambers | |
WO2009010374A1 (en) | Method and device for forming an electric control signal for an injection impulse | |
DE102011089296B4 (en) | Method and device for calibrating a fuel metering system of a motor vehicle | |
DE10143502C1 (en) | Control method for piezoelectric fuel injection valve for diesel engine calculates differential of force exerted on fuel injection valve by piezoactuator for correction of subsequent injection cycle | |
EP1882841A2 (en) | Method for detecting a pilot injection | |
WO2012016763A2 (en) | Method for operating an internal combustion engine having plurality of combustion chambers and internal combustion engine having a plurality of combustion chambers | |
EP1068435A1 (en) | Fuel supply system for an internal combustion engine, especially of a motor vehicle | |
EP2358988B1 (en) | Control and regulation method for an internal combustion engine having a common rail system | |
EP1527265A1 (en) | Method and device for controlling an actuator | |
DE102004053418B4 (en) | Method and device for pressure wave compensating control of temporally successive injections in an injection system of an internal combustion engine | |
EP1567758B1 (en) | Method and device for operating an injection system in an internal combustion engine | |
DE10303573B4 (en) | Method, computer program, storage medium and control and / or regulating device for operating an internal combustion engine, and internal combustion engine, in particular for a motor vehicle | |
DE102004001358A1 (en) | Control method and control device for an actuator | |
DE10305525B4 (en) | Method and device for adapting the pressure wave correction in a high-pressure injection system of a motor vehicle while driving | |
DE102010021448A1 (en) | Method for controlling electrical polarization of piezoelectric actuator of injection element in internal combustion engine of vehicle, involves changing polarization of actuator by adaptation of polarization of determined parameter | |
DE10359306A1 (en) | Method and device for operating an internal combustion engine | |
DE102019210713A1 (en) | Method for controlling a switching valve of an injector | |
DE10244092A1 (en) | Method and device for controlling at least two piezo actuators | |
DE102006057522B4 (en) | Control method for a volume flow control in an injection system | |
WO2013156377A1 (en) | Method and device for operating an internal combustion engine | |
DE102006015968B3 (en) | Adaptation method and adaptation device of an injection system of an internal combustion 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 |
|
17P | Request for examination filed |
Effective date: 20050228 |
|
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 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB IT |
|
17Q | First examination report despatched |
Effective date: 20101104 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F02D 41/20 20060101AFI20150716BHEP Ipc: F02D 41/40 20060101ALI20150716BHEP Ipc: F02D 41/38 20060101ALI20150716BHEP Ipc: F02D 41/24 20060101ALI20150716BHEP |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20160513 |
|
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: 20160924 |