WO2010066564A1 - Verfahren und vorrichtung zur adaption der injektionsmittelzufuhr in einem injektionssystem sowie abgasnachbehandlungssystem - Google Patents
Verfahren und vorrichtung zur adaption der injektionsmittelzufuhr in einem injektionssystem sowie abgasnachbehandlungssystem Download PDFInfo
- Publication number
- WO2010066564A1 WO2010066564A1 PCT/EP2009/065648 EP2009065648W WO2010066564A1 WO 2010066564 A1 WO2010066564 A1 WO 2010066564A1 EP 2009065648 W EP2009065648 W EP 2009065648W WO 2010066564 A1 WO2010066564 A1 WO 2010066564A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- injection
- injector
- pump
- line
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1473—Overflow or return means for the substances, e.g. conduits or valves for the return path
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0411—Methods of control or diagnosing using a feed-forward control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1808—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
- Y02T10/12—Improving ICE efficiencies
Definitions
- the invention relates to a method for adapting the injection agent supply in an injection system, to an apparatus for carrying out this method, and to an exhaust gas aftertreatment system.
- SCR Selective Catalytic Reduction
- NOx nitrogen oxides
- aqueous urea solutions The urea solution is hydrolyzed by means of hydrolysis catalysts or directly on the SCR catalyst to ammonia and carbon dioxide.
- the urea solution is injected into the exhaust gas stream by means of special metering systems upstream of the hydrolysis catalytic converter or the SCR catalytic converter. This results in a problem on the one hand to determine the optimal amount of reducing agent, on the other hand, but also to ensure the safe feeding and dosing of the reducing agent.
- the dosage can be done by means of an injector.
- the activation time and thus the opening time of the injector are decisive for the amount of reducing agent supplied to the exhaust aftertreatment system.
- the target amount of injection is set to a constant value and only the pause times between the injections are varied as needed.
- Target amount is adjusted so that a constant drive duration of the injector is determined, which corresponds to a constant injection quantity. It is important that the same amount of reducing agent can always be expected for a certain activation period. Thus, the amount injected over time is always a multiple of the constant injection quantity due to the variation of the pause times between two injections. This information is important in that there is so far no direct feedback from the system, which reflects the actual injection quantity. It can also be used a variable drive duration of the injector to vary the reducing agent supply. For this, however, the characteristic of the injector must be known. Deviations due to manufacturing tolerances or system aging can thus hitherto not be taken into account.
- the object of the present invention is therefore to provide a method for adapting the supply of injection medium in an injection system, which makes it possible in a simple manner to control and optimize the keeping constant of the injected injection quantity and if possible to realize it without additional components.
- a method for adapting the injection agent supply for an exhaust gas purification system with an injection system comprising an injection agent tank, an injector, a pump connected via at least one line to the injector and a pressure relief valve arranged in a line downstream of the pump, in which the following steps are carried out a) Setting a setpoint value for the injection medium pressure in the line downstream of the pump relative to the ambient pressure, b) Opening the pressure relief valve for a predetermined time t, c) Determining the pressure difference between the setpoint caused by the opening in step b) and
- steps a) and d) have different references. This has the background that in steps a) to c) a pressure drop after the opening of the pressure relief valve is to be determined, wherein the pressure release valve allows the injection medium to escape into the environment outside of the exhaust gas purification system. In contrast, in steps d) to f), a pressure drop is determined after the opening of the injector, wherein the injector injects the injection agent into the exhaust gas pressure applied to the exhaust gas purification system. Ambient pressure and exhaust gas pressure are generally not the same, so that this difference advantageously takes into account in the method according to the invention for the comparison of the differential pressures determined.
- the injection medium pressure can preferably be set up with the help of the pump. For example, an overpressure of about 5 bar can be set in each case based on the reference pressures.
- the exhaust pressure can be determined by pressure sensors or it can be determined by exhaust pressure models.
- steps g) and h) it is advantageously possible to use the difference of the pressure differences from the comparison of the same while the injector opening time is kept constant, to adapt the resulting amount of injectate taken from it.
- a new injection quantity of injection agent can be determined, for example, by multiplying the previously assumed injected injection quantity with the determined pressure difference ratio from step g).
- the relationship between the determined pressure difference ratio from step g) and the injection amount correction can be previously recorded on a test bench and stored as a map in a controller. It is also possible, based on the system stiffness and the pressure difference ratio from step g), to deduce the actually injected amount of injection agent.
- injection means for example, both ammonia solutions or aqueous solutions of precursor substances can be understood, which can be converted to ammonia, such as urea solutions.
- fuels are also referred to as injection agents, which are injected into the exhaust system, for example, for the regeneration of particulate filters.
- a method is provided with which, advantageously, a constant injection quantity can be realized in a simple manner in an injection system and by which a control of the injection quantity of the injector is made possible.
- the reliability of the injection system can be increased without having to operate a great deal of effort with additional system components.
- the method according to the invention makes use of the fact that a mostly existing pressure relief valve in the injection system has a very similar flow behavior as the injector.
- the pressure relief valve can also be selected identical to the injector. Due to the fact that the pressure relief valve is located in one of the lines downstream of the injector system pump, unlike the injector, it is not exposed to the exhaust gas loads.
- the aging due to the constant operation of the injector may be related to the pressure relief valve in the Compared to the injector is operated only to a small extent, are assumed to be negligible. Therefore, the pressure relief valve is particularly suitable as a reference for checking the flow behavior of the injector. This circumstance is advantageously used by the inventive method for adapting and controlling the injection quantity of the injector.
- the reference value of the pressure relief valve is also advantageously redetermined in each pass, so that environmental influences such as leakage or changed system rigidity are masked out. Too great a difference in the pressure differences determined according to the invention also leads to the conclusion that the injector is no longer functional. Such a control of the operating state of the injector has not been possible.
- the sequence of steps a) to c) and / or d) to f) can be repeated one or more times.
- the absolute pressure difference which is caused by the opening of the valve or the injector, be chosen large enough that it can be reliably determined by pressure sensors.
- the number of repetitions is registered and stored, so that an averaging can take place.
- the injector pressure in the line downstream of the pump can be measured by means of a pressure sensor in the line. In this way, the injection pressure can advantageously be determined directly.
- the injector pressure can be generated by the pump.
- the setting of the desired values as described above can be reliably implemented without additional material expenditure.
- the opening time t of the injector can be adapted in such a way that the difference between the pressure differences from steps c) and f) is as small as possible.
- the opening time t of the injector can be adapted in such a way that the difference between the pressure differences from steps c) and f) is as small as possible.
- an optimized adaptation and constant maintenance of the amount of injectant in a simple way are possible.
- ammonia or a precursor substance of ammonia preferably a urea solution, and / or fuel.
- the invention also relates to an apparatus for controlling an injection system for an exhaust gas purification system having an injection agent tank, an injector, a pump connected to the injector via at least one line, and a pressure relief valve disposed in a line downstream of the pump, means being provided for controlling the opening times of the Injector and the pressure relief valve and to determine and compare the pressure differences between a predetermined setpoint of the injector pressure in the line and caused by an opening of the injector or the pressure relief valve pressure drop.
- the greatest possible accuracy of the injection quantity by the injector is required.
- This can be made possible in a simple manner with the device according to the invention, in which the flow behavior of the pressure relief valve is taken into account as a reference for checking the injector and for adapting the quantity of injection medium.
- the pressure relief valve may be arranged in a return line, which is provided between the supply line of the injection means from the pump to the injector and the injection agent tank.
- control according to the invention may be in the line downstream of the pump, a pressure sensor for Measurement of the injection medium pressure to be arranged.
- a pressure sensor for Measurement of the injection medium pressure to be arranged.
- the invention further relates to an exhaust aftertreatment system for carrying out the method described above.
- the exhaust aftertreatment system according to the invention is coupled with an on-board diagnostics, which can indicate the functionality if necessary, a malfunction of the Injetechnischsmittel- feeder. If, for example, the determined adaptation value is too high or too high in comparison with the original initial value, this may indicate that the injector is no longer functional and appropriate measures can be taken via the on-board diagnostics, such as, for example, stopping the exhaust gas purification device or requesting the driver to visit a workshop. As a result, the service life of the overall system can be significantly improved.
- the sole FIGURE shows a schematic structure of an injection system controlled according to the invention for an injection agent supply device for liquid reducing agents using such an injector system.
- the illustrated SCR system includes an injectant tank 2 for the injectant.
- An injection medium pump 3 is arranged in the line 4.
- the conduit 4 serves to supply injection liquid from the injection agent tank 2 to the injector 5.
- the injector 5 may be any means capable of introducing the injection solution into the injector Exhaust pipe 6 of an internal combustion engine 7, for example, an engine of a motor vehicle to regulate.
- the injector 5 is connected upstream of an SCR catalytic converter 8 in the exhaust gas line 6.
- a pressure sensor 11 is arranged in the line 4. From the downstream of the pump 3 line section of the line 4 branches off a return line 10, with the aid of injection medium can be passed back to the injection tank 2. In the return line 10, the pressure relief valve 9 is arranged.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/133,982 US9181834B2 (en) | 2008-12-10 | 2009-11-23 | Method and device for adapting the injection agent supply in an injection system, and exhaust gas aftertreatment system |
CN2009801496675A CN102245869B (zh) | 2008-12-10 | 2009-11-23 | 用于匹配喷射系统中的喷射剂供给的方法 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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DE102008061472.6 | 2008-12-10 | ||
DE102008061472 | 2008-12-10 | ||
DE102009023325.3 | 2009-05-29 | ||
DE102009023325A DE102009023325B4 (de) | 2008-12-10 | 2009-05-29 | Verfahren zur Adaption der Injektionsmittelzufuhr in einem Injektionssystem |
Publications (1)
Publication Number | Publication Date |
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WO2010066564A1 true WO2010066564A1 (de) | 2010-06-17 |
Family
ID=41531738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/065648 WO2010066564A1 (de) | 2008-12-10 | 2009-11-23 | Verfahren und vorrichtung zur adaption der injektionsmittelzufuhr in einem injektionssystem sowie abgasnachbehandlungssystem |
Country Status (5)
Country | Link |
---|---|
US (1) | US9181834B2 (de) |
KR (1) | KR101628048B1 (de) |
CN (1) | CN102245869B (de) |
DE (1) | DE102009023325B4 (de) |
WO (1) | WO2010066564A1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011064076A1 (de) * | 2009-11-27 | 2011-06-03 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Verfahren zum betrieb einer fördervorrichtung für ein reduktionsmittel |
EP2453116A1 (de) * | 2010-11-16 | 2012-05-16 | PSA Peugeot Citroen Automobiles S.A. | Kontrollmethode für die Aktivierung eines Systems mit selektiver katalytischer Reduktion |
EP2557287A3 (de) * | 2011-08-12 | 2014-09-10 | Emitec Gesellschaft für Emissionstechnologie mbH | Verfahren zur Dosierung eines Reduktionsmittels |
EP2781710A1 (de) * | 2011-11-18 | 2014-09-24 | Toyota Jidosha Kabushiki Kaisha | Abgasreinigungssystem für einen verbrennungsmotor |
US9181834B2 (en) | 2008-12-10 | 2015-11-10 | Continental Automotive Gmbh | Method and device for adapting the injection agent supply in an injection system, and exhaust gas aftertreatment system |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011118214A1 (de) | 2011-11-11 | 2013-05-16 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Verfahren zum Betrieb einer Dosiervorrichtung |
SE536241C2 (sv) * | 2011-12-14 | 2013-07-16 | Scania Cv Ab | Förfarande för reduktionsmedelsdosering vid ett SCR-system med tryckreglering på basis av en temperatur vid avgasrör |
CN104114825A (zh) * | 2011-12-14 | 2014-10-22 | 斯堪尼亚商用车有限公司 | 用于scr系统的方法和scr系统 |
DE102012203849A1 (de) | 2012-03-13 | 2013-09-19 | Continental Automotive Gmbh | Abgasturbolader mit einem Wastegateventil und einem Schubumluftventil |
US9839877B2 (en) * | 2013-10-10 | 2017-12-12 | Cummins Emission Solutions Inc. | Reagent doser diagnostic system and method |
US9221014B2 (en) * | 2013-11-20 | 2015-12-29 | Tenneco Automotive Operating Company Inc. | Fluid injection control system |
SE538383C2 (sv) | 2014-04-25 | 2016-06-07 | Scania Cv Ab | Doseringssystem och metod för att övervaka mängden fluid somdoseras av doseringssystemet |
US10473013B2 (en) * | 2014-09-26 | 2019-11-12 | Cummins Emission Solutions, Inc. | Integrative reductant system and method using constant volume injection |
GB2561549B (en) * | 2017-04-06 | 2019-05-29 | Delphi Tech Ip Ltd | Method of detecting a doser valve opening or closing event |
DE102017206907A1 (de) * | 2017-04-25 | 2018-10-25 | Robert Bosch Gmbh | Verfahren zum Ansteuern eines elektrisch steuerbaren Reduktionsmitteldosierventils eines Verbrennungsmotors |
DE102018200572A1 (de) * | 2018-01-15 | 2019-07-18 | Robert Bosch Gmbh | Verfahren zur Überprüfung eines SCR-Systems mit zumindest zwei Dosierventilen |
US10590823B2 (en) | 2018-01-24 | 2020-03-17 | Tenneco Automotive Operating Company Inc. | Systems and methods for improving injector accuracy |
US10883404B2 (en) | 2019-02-13 | 2021-01-05 | GM Global Technology Operations LLC | Method and apparatus for controlling reductant injection into an exhaust gas feedstream of an internal combustion engine |
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-
2009
- 2009-05-29 DE DE102009023325A patent/DE102009023325B4/de active Active
- 2009-11-23 CN CN2009801496675A patent/CN102245869B/zh active Active
- 2009-11-23 KR KR1020117015925A patent/KR101628048B1/ko active IP Right Grant
- 2009-11-23 WO PCT/EP2009/065648 patent/WO2010066564A1/de active Application Filing
- 2009-11-23 US US13/133,982 patent/US9181834B2/en not_active Expired - Fee Related
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EP1149991A2 (de) * | 2000-02-22 | 2001-10-31 | Ford Global Technologies, Inc. | Steuerung der Fördereinrichtung eines NOx Reduktionsmittels |
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Cited By (9)
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US9181834B2 (en) | 2008-12-10 | 2015-11-10 | Continental Automotive Gmbh | Method and device for adapting the injection agent supply in an injection system, and exhaust gas aftertreatment system |
WO2011064076A1 (de) * | 2009-11-27 | 2011-06-03 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Verfahren zum betrieb einer fördervorrichtung für ein reduktionsmittel |
US8820053B2 (en) | 2009-11-27 | 2014-09-02 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Method for operating a delivery device for a reducing agent and motor vehicle having a delivery device |
EP2453116A1 (de) * | 2010-11-16 | 2012-05-16 | PSA Peugeot Citroen Automobiles S.A. | Kontrollmethode für die Aktivierung eines Systems mit selektiver katalytischer Reduktion |
FR2967464A1 (fr) * | 2010-11-16 | 2012-05-18 | Peugeot Citroen Automobiles Sa | Methode de controle de l'activation d'un systeme de reduction catalytique selective |
EP2557287A3 (de) * | 2011-08-12 | 2014-09-10 | Emitec Gesellschaft für Emissionstechnologie mbH | Verfahren zur Dosierung eines Reduktionsmittels |
US8931258B2 (en) | 2011-08-12 | 2015-01-13 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Method for metering a reducing agent, method for setting up a control unit for a metering device and motor vehicle having a metering device |
EP2781710A1 (de) * | 2011-11-18 | 2014-09-24 | Toyota Jidosha Kabushiki Kaisha | Abgasreinigungssystem für einen verbrennungsmotor |
EP2781710A4 (de) * | 2011-11-18 | 2015-04-08 | Toyota Motor Co Ltd | Abgasreinigungssystem für einen verbrennungsmotor |
Also Published As
Publication number | Publication date |
---|---|
CN102245869B (zh) | 2013-07-31 |
DE102009023325B4 (de) | 2012-01-26 |
US9181834B2 (en) | 2015-11-10 |
KR101628048B1 (ko) | 2016-06-08 |
KR20110097943A (ko) | 2011-08-31 |
CN102245869A (zh) | 2011-11-16 |
US20110239625A1 (en) | 2011-10-06 |
DE102009023325A1 (de) | 2010-06-24 |
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