EP0388412A1 - Regelsystem für das luft/kraftstoff-verhältnis einer brennkraftmaschine. - Google Patents
Regelsystem für das luft/kraftstoff-verhältnis einer brennkraftmaschine.Info
- Publication number
- EP0388412A1 EP0388412A1 EP19880909199 EP88909199A EP0388412A1 EP 0388412 A1 EP0388412 A1 EP 0388412A1 EP 19880909199 EP19880909199 EP 19880909199 EP 88909199 A EP88909199 A EP 88909199A EP 0388412 A1 EP0388412 A1 EP 0388412A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- probe
- lambda
- control
- air ratio
- control system
- 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.)
- Granted
Links
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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1477—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1409—Introducing closed-loop corrections characterised by the control or regulation method using at least a proportional, integral or derivative controller
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
- F02D41/1441—Plural sensors
Definitions
- the values for the injection which are stored in a characteristic diagram as a function of the speed and load (throttle kl appenstel 1 ung) of the internal combustion engine, are corrected multiplicatively via a correction factor by means of a two-point control Correction factor used a two-point controller with PI behavior.
- the required lambda air ratio can therefore only be maintained on average.
- the amplitude and frequency of this control vibration have a significant influence on the exhaust gas emission. An increase in the amplitude of the control oscillation causes the air ratio lambda to move temporarily outside the lambda window and this leads to a drastic increase in the harmful components of the exhaust gases.
- the invention is based on the object of improving a control system for controlling the air / fuel ratio in an internal combustion engine with regard to reducing the overall emission of the main pollutant components ser.
- the solution according to claim 1 is characterized in that the control system according to the invention has a control device for continuous control, the jump behavior of the output signal of the lambda probe (two-point control) for mixture control not being evaluated as in the prior art, instead the actual deviation of the air ratio lambda from the air ratio lambda to be maintained is used as the control deviation.
- the respective actual value of the air ratio lambda is determined via the respectively measured probe output voltage in connection with an at least approximately predetermined characteristic relationship between the size of the probe output voltage and the magnitude of the air ratio lambda coupled therewith.
- the target value of the air ratio lambda corresponding to the air ratio lambda to be observed is subtracted from the actual value of the air ratio lambda and the air / fuel ratio is regulated with the difference.
- the result of the strong cylinder scattering is that the two-point control jumps from rich to lean or lean to rich with an increased frequency between the extreme values of lean and rich when passing through the rule smolder 1e, which has an unfavorable effect on the exhaust gas and Driving behavior of the internal combustion engine affects.
- a control device according to the invention with constant control behavior, this switching between two extreme values, which is operated at an increased frequency, is avoided.
- the control system according to the independent claim 2 is characterized by a control device for continuous control, a probe voltage being used as the target value, which is assigned to the air ratio lambda to be maintained in accordance with the respective probe characteristic, and via the difference between The actual values of the probe voltage measured in each case with the target value of the probe voltage in connection with an at least approximately predefined probe characteristic relationship between the size of the probe voltage difference and the associated size of the air ratio difference, the air ratio difference is determined and with the air ratio difference the air / Fuel ratio is regulated.
- a control device for continuous control a probe voltage being used as the target value, which is assigned to the air ratio lambda to be maintained in accordance with the respective probe characteristic, and via the difference between The actual values of the probe voltage measured in each case with the target value of the probe voltage in connection with an at least approximately predefined probe characteristic relationship between the size of the probe voltage difference and the associated size of the air ratio difference, the air ratio difference is determined and with the air ratio difference the air / Fuel ratio is regulated.
- the probe-characteristic combination is advantageously The relationship between probe voltage and air ratio lambda or probe voltage difference and air ratio differential is stored in a map. According to a further advantageous embodiment of the invention, the probe voltage or probe voltage difference and the temperature-dependent relationship between probe voltage or probe voltage difference and temperature are used as input parameters of this characteristic field, and a temperature-dependent probe resistance or the probe temperature itself are used to take into account the temperature-dependent relationship between probe voltage or probe voltage difference.
- control setpoint of the probe voltage U ⁇ - is dependent on the measured maximum and minimum probe voltage according to the formula
- K is a constant factor that is determined based on the probe characteristics.
- the control setpoint is also corrected using a low-pass filter. Furthermore, the measured probe voltage extreme values are stored and slowly reduced for the fact that no new extreme values of the probe voltage are measured. With this adaptation, it is possible to take into account the shifting of the control setpoint of the probe voltage due to aging of the probe or temperature change of the probe.
- Fig. 1 shows a simplified block diagram of a control arrangement with a control system for controlling the air / fuel ratio in an internal combustion engine according to claim 1.
- Fig. 2 shows a control arrangement with a control system according to the invention for controlling the air / fuel ratio in an internal combustion engine according to the secondary claim 2, but not the entire control arrangement is shown, but only components are shown in which the control arrangement according to claim 2 differs from that according to claim 1.
- the 1 has an internal combustion engine (BKM) 10 as a controlled system with injection valves (EV) 11 as actuators, a control device 12, (dashed border) an i exhaust gas of the internal combustion engine arranged lambda probe 13 and a basic map 14.
- the basic map 14 is preferably designed as a read-only memory (ROM), which is addressed by supplied operating variables (here: speed n and throttle valve 1 and co). Depending on these addresses, a corresponding injection time t. Is obtained for the injection valves 11 of the internal combustion engine 10 is read from the basic field 14.
- the lambda probe 13 emits an output signal (output voltage U s ) which is fed to the control device 12.
- the control device 12 outputs a correction factor KF as a manipulated variable, which multiplier
- the injection time t. output from the basic characteristic map 14 is corrected, which results in the corrected injection time t.
- the control device 12 is supplied with a control value 15 of the air ratio lambda , which in turn can depend on the throttle valve position o and the speed n of the internal combustion engine 10.
- the control unit 12 has a conversion device 16, by means of which the probe output signals U- of the lambda probe 13 are converted into lambda values in accordance with the probe-characteristic relationship between the lambda value and the probe voltage. Either a mathematical function, a table or a map is used to map the probe-characteristic relationship.
- the conversion is within the control device 12! ungsei nri ch- device 16, a timing element 17 is connected downstream and a correction device 18 for calculating a correction factor KF.
- This correction factor KF is fed to a multiplication unit 19, which the correction factor KF has with the injection time t output from the basic characteristic diagram 14. multiplicated.
- the output of the correction factor KF can be interrupted by a switch 20, which is switched via a control release device 21. In certain operating phases of the internal combustion engine (for example, start phase, warm-up phase, unsteady phases), regulation to a predefined lambda air ratio is not desired. In these cases, the output of the correction factor KF is interrupted by the control-free delivery device 21 via the switch 20.
- the output signal of the lambda probe arranged in the exhaust gas of the internal combustion engine 10 is fed to the conversion device 16. Since the correction factor KF is preferably calculated using a computer, the analog probe output signal is converted into a digital signal after amplification by an A / D converter (not shown in FIG. 1).
- the conversion unit 16 calculates the respectively measured actual value of the air ratio lambda from the output signal of the lambda sensor 13 via a predetermined probe-characteristic relationship between the output voltage of the sensor and the air ratio lambda.
- the subsequent comparison of the actual value and the target value 15 of the air ratio lambda leads to a control deviation .DELTA.-lambda, which is supplied to a timer 17.
- the timing element then emits a signal to a correction device 18, which carries out the calculation of the correction factor KF.
- the correction factor KF is then superimposed on the injection time t 1 output from the basic characteristic diagram 14, which results in the corrected injection time t 1.
- the digitally calculated injection time t is given to an output stage (not shown in FIG. 1) and is given to the injection valves 11 as an analog opening time signal.
- the control arrangement shown in FIG. 2 essentially has a structure similar to the control arrangement of FIG. 1.
- the same components have the same reference numerals as in FIG. 1 and are not explained again here.
- the difference from the control arrangement shown in FIG. 1 is that the control deviation ⁇ lambda is determined in another way.
- a setpoint voltage 22 is used, which in turn can depend on the throttle valve position or the speed n.
- control arrangement according to FIG. 2 has a conversion unit 23, which stores the characteristic curve of the probe between the probe voltage difference and the associated air ratio differential. After the actual probe voltage has been compared with the So! 1 -sensor voltage 22 leads to a control deviation _1-U ⁇ , from which the control deviation ⁇ -lambda is calculated.
- the further regulation diagram corresponds to the regulation diagram on the regulation arrangement according to FIG. 1, which is why, in order to avoid repetitions, it is not described again.
- a continuous controller with PID behavior of the timing element 17 is particularly advantageously used, the control deviation being multiplied by suitable factors for the respective P, I and D components, the speed and are stored in characteristic maps depending on the load.
- a correction device therefore eliminates this mass offset by measuring the minimum probe voltage that occurs in prolonged overrun phases (eg after 800 msec) and saves the difference to the expected minimum value using a filter as a correction variable for the probe voltages to be measured.
- the probe voltage upstream of the analog / digital converter is increased in hardware by a fixed voltage value. This elimination of the mass offset leads to a higher accuracy in the detection of the probe output voltage and thus to a higher control accuracy of the continuous control device.
- this correction device serves to compensate for a drift of the lean characteristic! i nienasts (increase) z. B. by aging.
- the mass offset alone can also be compensated for, if necessary, by using a differential amplifier.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3738132 | 1987-11-10 | ||
DE3738132 | 1987-11-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0388412A1 true EP0388412A1 (de) | 1990-09-26 |
EP0388412B1 EP0388412B1 (de) | 1992-06-17 |
Family
ID=6340185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88909199A Expired - Lifetime EP0388412B1 (de) | 1987-11-10 | 1988-10-26 | Regelsystem für das luft/kraftstoff-verhältnis einer brennkraftmaschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US5036819A (de) |
EP (1) | EP0388412B1 (de) |
JP (1) | JP2930596B2 (de) |
KR (1) | KR0135277B1 (de) |
DE (3) | DE3827978A1 (de) |
WO (1) | WO1989004424A1 (de) |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2765136B2 (ja) * | 1989-12-14 | 1998-06-11 | 株式会社デンソー | エンジン用空燃比制御装置 |
DE4001616C2 (de) * | 1990-01-20 | 1998-12-10 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Kraftstoffmengenregelung für eine Brennkraftmaschine mit Katalysator |
DE4024212C2 (de) * | 1990-07-31 | 1999-09-02 | Bosch Gmbh Robert | Verfahren zur stetigen Lambdaregelung einer Brennkraftmaschine mit Katalysator |
JP2989929B2 (ja) * | 1991-05-13 | 1999-12-13 | 株式会社デンソー | 内燃機関の空燃比制御装置 |
JP3138498B2 (ja) * | 1991-06-14 | 2001-02-26 | 本田技研工業株式会社 | 内燃機関の空燃比制御装置 |
JPH0568762A (ja) * | 1991-09-11 | 1993-03-23 | Yamato Sewing Mach Seizo Kk | 縫製生地の布端位置制御方法及びその装置 |
DE4136911A1 (de) * | 1991-11-09 | 1993-05-13 | Till Keesmann | Verfahren zur katalytischen nachverbrennung der abgase einer mit mehreren zylindern ausgestatteten brennkraftmaschine und vorrichtung zur ausuebung dieses verfahrens |
JP3321477B2 (ja) | 1993-04-09 | 2002-09-03 | 株式会社日立製作所 | 排気浄化装置の診断装置 |
DE4311890C2 (de) * | 1993-04-10 | 1995-05-18 | Comuna Metall Vorrichtungs Und | Stationär betriebene Brennkraftmaschine mit Abgasreinigung |
US5778866A (en) * | 1996-01-25 | 1998-07-14 | Unisia Jecs Corporation | Air-fuel ratio detecting system of internal combustion engine |
DE19606652B4 (de) * | 1996-02-23 | 2004-02-12 | Robert Bosch Gmbh | Verfahren der Einstellung des Kraftstoff-Luftverhältnisses für eine Brennkraftmaschine mit nachgeschaltetem Katalysator |
JPH09236569A (ja) * | 1996-03-01 | 1997-09-09 | Hitachi Ltd | 内燃機関の排気浄化装置の機能診断装置 |
DE19833450C2 (de) * | 1998-07-24 | 2003-10-09 | Siemens Ag | Verfahren zum Bestimmen des Initialisierungswertes eines Temperaturmodells für einen Abgaskatalysator einer Brennkraftmaschine |
DE19842425C2 (de) | 1998-09-16 | 2003-10-02 | Siemens Ag | Verfahren zur Korrektur der Kennlinie einer linearen Lambda-Sonde |
DE19856367C1 (de) | 1998-12-07 | 2000-06-21 | Siemens Ag | Verfahren zur Reinigung des Abgases mit Lambda-Regelung |
DE19911664A1 (de) * | 1999-03-16 | 2000-09-21 | Volkswagen Ag | Kalibrierung eines NOx-Sensors |
DE10025034A1 (de) * | 2000-05-20 | 2001-11-22 | Dmc2 Degussa Metals Catalysts | Verfahren zum Betreiben einer Abgasreinigungsvorrichtung an einem Otto-Motor |
JP4503222B2 (ja) * | 2002-08-08 | 2010-07-14 | 本田技研工業株式会社 | 内燃機関の空燃比制御装置 |
DE10316994A1 (de) * | 2003-04-11 | 2004-10-28 | E.On Ruhrgas Ag | Verfahren zum Überwachen der Verbrennung in einer Verbrennungseinrichtung |
JP4170167B2 (ja) * | 2003-07-04 | 2008-10-22 | 株式会社日立製作所 | 内燃機関の空燃比制御装置 |
DE102005029950B4 (de) * | 2005-06-28 | 2017-02-23 | Volkswagen Ag | Lambdaregelung bei einem Verbrennungsmotor |
DE102005038492B4 (de) * | 2005-08-13 | 2016-07-21 | Volkswagen Ag | Verfahren und Vorrichtung zur Offsetbestimmung eines berechneten oder gemessenen Lambdawertes |
DE102005056152A1 (de) | 2005-11-23 | 2007-05-24 | Robert Bosch Gmbh | Verfahren zum Kalibrieren des von einem Breitband-Lambdasensor bereitgestellten Signals und Vorrichtung zur Durchführung des Verfahrens |
DE102006013293B4 (de) * | 2006-03-23 | 2016-08-18 | Robert Bosch Gmbh | Verfahren zur Diagnose einer Abgasnachbehandlungsvorrichtung und Vorrichtung zur Durchführung des Verfahrens |
DE102007015362A1 (de) | 2007-03-30 | 2008-10-02 | Volkswagen Ag | Verfahren zur Lambda-Regelung mit Kennlinienanpassung |
DE102007016276A1 (de) | 2007-04-04 | 2008-10-09 | Volkswagen Ag | Lambda-Regelung mit einer Kennlinienadaption |
EP1990525B1 (de) * | 2007-05-07 | 2013-07-10 | Volvo Car Corporation | Motorensystem und Verfahren zur Anpassung des Luft-Brennstoff-Verhältnisses in einem Motorensystem |
DE102009007572B4 (de) * | 2009-02-05 | 2013-10-02 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine |
JP5857662B2 (ja) * | 2011-11-18 | 2016-02-10 | いすゞ自動車株式会社 | 内燃機関の燃料噴射の異常判定方法と内燃機関 |
DE102012211687B4 (de) | 2012-07-05 | 2024-03-21 | Robert Bosch Gmbh | Verfahren und Steuereinheit zur Erkennung eines Spannungsoffsets einer Spannungs-Lambda-Kennlinie |
DE102012211683B4 (de) * | 2012-07-05 | 2024-03-21 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Korrektur einer Kennlinie einer Zweipunkt-Lambdasonde |
US10990386B2 (en) | 2018-10-08 | 2021-04-27 | Honeywell International Inc. | Localized executable functions platform for execution of diagnostic, operational, and other computational algorithms |
DE102021104061B3 (de) | 2021-02-22 | 2022-07-07 | Bayerische Motoren Werke Aktiengesellschaft | Detektion eines Abbrands in einer Sauganlage |
Family Cites Families (14)
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US3738341A (en) * | 1969-03-22 | 1973-06-12 | Philips Corp | Device for controlling the air-fuel ratio {80 {11 in a combustion engine |
IT1081383B (it) * | 1977-04-27 | 1985-05-21 | Magneti Marelli Spa | Apparecchiatura elettronica per il controllo dell'alimentazione di una miscela aria/benzina di un motore a combustione interna |
JPS5495833A (en) * | 1978-01-11 | 1979-07-28 | Hitachi Ltd | Air fuel ratio controller |
JPS5923038A (ja) * | 1982-07-30 | 1984-02-06 | Hitachi Ltd | 内燃機関の空燃比制御方法 |
DE3231122C2 (de) * | 1982-08-21 | 1994-05-11 | Bosch Gmbh Robert | Regeleinrichtung für die Gemischzusammensetzung einer Brennkraftmaschine |
DE3238753A1 (de) * | 1982-10-20 | 1984-04-26 | Robert Bosch Gmbh, 7000 Stuttgart | Verfahren und vorrichtung zur regelung des einer brennkraftmaschine zuzufuehrenden kraftstoffluftgemischs |
DE3341015A1 (de) * | 1983-11-12 | 1985-05-30 | Robert Bosch Gmbh, 7000 Stuttgart | Einrichtung fuer die gemischaufbereitung bei einer brennkraftmaschine |
JPS60178941A (ja) * | 1984-02-27 | 1985-09-12 | Nissan Motor Co Ltd | 内燃機関の空燃比制御装置 |
JPH0737776B2 (ja) * | 1986-03-04 | 1995-04-26 | 本田技研工業株式会社 | 内燃エンジンの空燃比制御方法 |
JP2601455B2 (ja) * | 1986-04-24 | 1997-04-16 | 本田技研工業株式会社 | 内燃エンジンの空燃比制御方法 |
DE3713790A1 (de) * | 1986-04-24 | 1987-11-05 | Honda Motor Co Ltd | Verfahren zum regeln des luft/kraftstoff-verhaeltnisses eines einer brennkraftmaschine gelieferten kraftstoffgemisches |
US4770147A (en) * | 1986-04-25 | 1988-09-13 | Fuji Jukogyo Kabushiki Kaisha | Air-fuel ratio control system for an engine |
JPH0718359B2 (ja) * | 1987-03-14 | 1995-03-01 | 株式会社日立製作所 | エンジンの空燃比制御方法 |
US4926826A (en) * | 1987-08-31 | 1990-05-22 | Japan Electronic Control Systems Co., Ltd. | Electric air-fuel ratio control apparatus for use in internal combustion engine |
-
1988
- 1988-08-18 DE DE3827978A patent/DE3827978A1/de not_active Withdrawn
- 1988-10-26 KR KR1019890701293A patent/KR0135277B1/ko not_active IP Right Cessation
- 1988-10-26 EP EP88909199A patent/EP0388412B1/de not_active Expired - Lifetime
- 1988-10-26 US US07/477,976 patent/US5036819A/en not_active Expired - Lifetime
- 1988-10-26 WO PCT/DE1988/000659 patent/WO1989004424A1/de active IP Right Grant
- 1988-10-26 DE DE8888909199T patent/DE3872249D1/de not_active Expired - Lifetime
- 1988-10-26 JP JP63508392A patent/JP2930596B2/ja not_active Expired - Lifetime
- 1988-11-09 DE DE3837984A patent/DE3837984A1/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO8904424A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0388412B1 (de) | 1992-06-17 |
DE3872249D1 (de) | 1992-07-23 |
US5036819A (en) | 1991-08-06 |
DE3827978A1 (de) | 1989-05-18 |
DE3837984A1 (de) | 1989-05-18 |
WO1989004424A1 (en) | 1989-05-18 |
JP2930596B2 (ja) | 1999-08-03 |
KR0135277B1 (ko) | 1998-04-23 |
JPH03500565A (ja) | 1991-02-07 |
KR890701884A (ko) | 1989-12-22 |
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Legal Events
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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 |
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17P | Request for examination filed |
Effective date: 19900329 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
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17Q | First examination report despatched |
Effective date: 19910114 |
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RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
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