DE102008052988A1 - Method for controlling exhaust gas after treatment for internal combustion engine, involves supplying coolant to reducing agent injection valve depending on temperature of reducing agent injection valve - Google Patents
Method for controlling exhaust gas after treatment for internal combustion engine, involves supplying coolant to reducing agent injection valve depending on temperature of reducing agent injection valve Download PDFInfo
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- DE102008052988A1 DE102008052988A1 DE102008052988A DE102008052988A DE102008052988A1 DE 102008052988 A1 DE102008052988 A1 DE 102008052988A1 DE 102008052988 A DE102008052988 A DE 102008052988A DE 102008052988 A DE102008052988 A DE 102008052988A DE 102008052988 A1 DE102008052988 A1 DE 102008052988A1
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- Prior art keywords
- reducing agent
- injection valve
- agent injection
- cooling medium
- internal combustion
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Classifications
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- 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
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- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
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- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
-
- 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
- F01N2610/11—Adding substances to exhaust gases the substance or part of the dosing system being cooled
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Steuern einer Abgasnachbehandlung für eine Brennkraftmaschine.The The invention relates to a method and a device for controlling an exhaust aftertreatment for an internal combustion engine.
Immer strengere gesetzliche Vorschriften bezüglich zulässiger Schadstoffemissionen in Kraftfahrzeugen, in denen Brennkraftmaschinen angeordnet sind, machen es erforderlich, die Schadstoffemissionen bei einem Betrieb der Brennkraftmaschine so gering wie möglich zu halten. Dies kann zum einen dadurch erfolgen, dass die Schadstoffemissionen verringert werden, die während der Verbrennung des Luft-/Kraftstoff-Gemisches in dem jeweiligen Zylinder der Brennkraftmaschine entstehen. Zum anderen sind in Brennkraftmaschinen Abgasnachbehandlungssysteme im Einsatz, die die Schadstoffemissionen, die während des Verbrennungsprozesses des Luft-/Kraftstoff-Gemisches in dem jeweiligen Zylinder erzeugt werden, in unschädliche Stoffe umwandeln. Zu diesem Zweck werden Katalysatoren eingesetzt, die Kohlenmonoxid, Kohlenwasserstoffe und Stickoxide in unschädliche Stoffe umwandeln. Sowohl das gezielte Beeinflussen des Erzeugens der Schadstoffemissionen während der Verbrennung als auch das Umwandeln der Schadstoffkomponenten mit einem hohen Wirkungsgrad durch einen Abgaskatalysator setzen ein sehr präzise eingestelltes Luft/Kraftstoff-Verhältnis in dem jeweiligen Zylinder voraus.always stricter legal regulations regarding permissible pollutant emissions in motor vehicles, in which internal combustion engines are arranged, make it necessary to pollutant emissions in one operation Keep the internal combustion engine as low as possible. This can on the one hand done by reducing the pollutant emissions be that while the combustion of the air / fuel mixture in the respective Cylinder of the internal combustion engine arise. On the other hand are in internal combustion engines Exhaust aftertreatment systems in use, the pollutant emissions, the while the combustion process of the air / fuel mixture in the respective cylinders are generated, convert into harmless substances. To For this purpose catalysts are used, the carbon monoxide, Convert hydrocarbons and nitrogen oxides into harmless substances. Either the targeted influencing of the generation of pollutant emissions while combustion as well as the conversion of pollutant components with a high efficiency through a catalytic converter set a very precise adjusted air / fuel ratio in the respective cylinder ahead.
In diesem Zusammenhang muss sichergestellt werden, dass die Komponenten des Abgasnachbehandlungssystems auch in der gewünschten Art und Weise über eine lange Betriebsdauer funktionieren und Fehler zuverlässig erkannt werden.In In this context, it must be ensured that the components the exhaust aftertreatment system also in the desired manner via a long operating time and error detected reliably become.
Bei einem mager laufenden Ottomotor und bei einer Diesel-Brennkraftmaschine können bei einem Verbrennungsprozess in einem Brennraum der entsprechenden Brennkraftmaschine Stickoxide entstehen. Die entstandenen Stickoxide sind dann Bestandteil eines Abgases der Brennkraftmaschine. Zum Reduzieren des Stickoxidgehalts des Abgases kann dem Abgastrakt der Brennkraftmaschine ein Reduktionsmittel zugemessen werden, durch das die Stickoxide in einem SCR-Katalysator zu unbedenklichem Stickstoff und Wasser reagieren können. Als Reduktionsmittel wird vorzugsweise Ammoniak verwendet. Der Ammoniak kann durch Erwärmen eines Komplexsalzes gewonnen werden und gasförmig dem Abgastrakt zugemessen werden. Alternativ dazu kann dem Abgastrakt eine wässrige Harnstofflösung zugemessen werden, die dann aufgrund der Hitze im Abgastrakt zumindest teilweise zu Ammoniak hydrolysiert, der in dem SCR-Katalysator mit den Stickoxiden des Abgases reagiert. Falls die Stickoxide nicht vollständig reduziert werden, tragen sie zur Umweltverschmutzung bei. Falls ein Überschuss an Ammoniak zugemessen wird und der Ammoniak aus dem Abgastrakt austritt, so führt dies zu einer deutlichen Geruchsbelästigung in einer Umgebung der Brennkraftmaschine.at a lean-running gasoline engine and a diesel internal combustion engine can in a combustion process in a combustion chamber of the corresponding Internal combustion engine Nitrogen oxides are formed. The resulting nitrogen oxides are then part of an exhaust gas of the internal combustion engine. To the Reducing the nitrogen oxide content of the exhaust gas can the exhaust tract the engine are assigned a reducing agent, by the nitrogen oxides in an SCR catalyst to harmless nitrogen and water can react. The reducing agent used is preferably ammonia. The ammonia can by heating a complex salt are obtained and gaseous attributed to the exhaust tract become. Alternatively, an aqueous urea solution may be added to the exhaust tract then, due to the heat in the exhaust system at least partially hydrolyzed to ammonia, which in the SCR catalyst with the nitrogen oxides of the Exhaust gas reacts. If the nitrogen oxides are not completely reduced contribute to environmental pollution. If there is a surplus is added to ammonia and the ammonia from the exhaust tract exit, so leads This leads to a significant odor nuisance in an environment of the internal combustion engine.
Die Aufgabe, die der Erfindung zugrunde liegt, ist, ein Verfahren und eine Vorrichtung zum Steuern einer Abgasnachbehandlung für eine Brennkraftmaschine zu schaffen, das bzw. die zu einer besonders vorteilhaften Reduzierung eines Schadstoffgehalts eines Abgases der Brennkraftmaschine beitragen und durch das bzw. die ein dauerhaft zuverlässiger Betrieb der Abgasnachbehandlung erreicht wird.The The object of the invention is based, a method and an apparatus for controlling an exhaust aftertreatment for an internal combustion engine to create, the or to a particularly advantageous reduction Contribute a pollutant content of an exhaust gas of the internal combustion engine and by the one or more permanently reliable operation of the exhaust aftertreatment is reached.
Die Aufgabe wird gelöst durch die Merkmale der unabhängigen Ansprüche. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.The Task is solved by the characteristics of the independent Claims. Advantageous embodiments of the invention are specified in the subclaims.
Die Erfindung zeichnet sich aus durch ein Verfahren und eine Vorrichtung zum Steuern einer Abgasnachbehandlung für eine Brennkraftmaschine mit mindestens einem Zylinder mit einem Brennraum und einem Abgastrakt, in dem ein SCR-Katalysator angeordnet ist, und einem Reduktionsmittelzuführsystem mit einem Reduktionsmitteleinspritzventil. Das Reduktionsmitteleinspritzventil ist in dem Abgastrakt stromaufwärts des SCR-Katalysators der Brennkraftmaschine angeordnet und zum Zumessen von Reduktionsmittel in den Abgastrakt ausgebildet. Dem Reduktionsmitteleinspritzventil wird abhängig von einer Temperatur des Reduktionsmitteleinspritzventils ein Kühlmedium zugeführt, das zum Kühlen des Reduktionsmitteleinspritzventils in dem Abgastrakt ausgebildet ist.The Invention is characterized by a method and an apparatus for controlling an exhaust aftertreatment for an internal combustion engine with at least one cylinder with a combustion chamber and an exhaust gas tract, in which an SCR catalyst is arranged, and a Reduktionsmittelzuführsystem with a reducing agent injection valve. The reducing agent injection valve is upstream in the exhaust tract arranged the SCR catalytic converter of the internal combustion engine and for metering Reductant formed in the exhaust system. The reducing agent injection valve becomes dependent on a temperature of the reducing agent injection valve, a cooling medium supplied that for cooling the Reductant injection valve is formed in the exhaust system.
Das Kühlmedium wird insbesondere den Teilen des Reduktionsmitteleinspritzventils zugeführt, die unmittelbar in dem Abgastrakt angeordnet sind. Insbesondere ist nicht erforderlich, den Teilen des Reduktionsmitteleinspritzventils Kühlmedium zuzuführen, die außerhalb des Abgastrakts angeordnet sind.The cooling medium in particular, the parts of the reducing agent injection valve fed to the are arranged directly in the exhaust tract. In particular not required, the parts of the reducing agent injection valve cooling medium supply, the outside the exhaust tract are arranged.
Dies hat den Vorteil, dass das Reduktionsmitteleinspritzventil geschützt werden kann. Insbesondere können die Teile des Reduktionsmitteleinspritzventils, die unmittelbar in dem Abgastrakt angeordnet sind, vor Überhitzung geschützt werden. Damit ist eine lange Lebenszeit des Reduktionsmitteleinspritzventils erreichbar. Neben der Vorrichtung zur Zufuhr von Kühlmedium sind keine Änderungen an der bestehenden Konfiguration des Reduktionsmittelzuführsystems, insbesondere nicht an dem Reduktionsmitteleinspritzventil, erforderlich. Somit ist auch ein Einsatz des Reduktionsmittelzuführsystems mit Zufuhr von Kühlmedium in bestehenden Serien einsetzbar. Ein weiterer Vorteil besteht darin, dass das Reduktionsmittel aufgrund der niedrigeren Temperaturen an dem Reduktionsmitteleinspritzventil eine hohe Stabilität im Hinblick auf thermische Beanspruchung haben kann.This has the advantage that the reducing agent injection valve can be protected. In particular, the parts of the reducing agent injection valve, which are arranged directly in the exhaust tract, can be protected against overheating. This achieves a long lifetime of the reducing agent injection valve. In addition to the device for supplying cooling medium, no changes to the existing configuration of the reducing agent supply system, in particular not to the reducing agent injection valve, are required. Thus, it is also possible to use the reducing agent supply system with the supply of cooling medium in existing series. Another advantage is that the reducing agent due to the lower temperatures at the reducing agent injection valve a high stability in terms of thermal stress can have.
In einer vorteilhaften Ausgestaltung wird eine Kenngröße für eine Temperatur des Reduktionsmitteleinspritzventils in dem Abgastrakt ermittelt, und ein Stellsignal für ein Stellglied zum Zuführen des Kühlmediums zu dem Reduktionsmitteleinspritzventil abhängig von der Kenngröße für die Temperatur des Reduktionsmitteleinspritzventils in dem Abgastrakt ermittelt. Damit ist ein bedarfsgerechtes Eindüsen von Kühlmittel möglich. Der Kühlmittelverbrauch kann gering gehalten werden.In an advantageous embodiment is a parameter for a temperature of the reducing agent injection valve in the exhaust gas tract, and a control signal for an actuator for feeding of the cooling medium to the reducing agent injection valve depending on the characteristic of the temperature of the reducing agent injection valve in the exhaust tract. Thus, a demand-based injection of coolant is possible. The coolant consumption can be kept low.
In einer weiteren vorteilhaften Ausführungsform erfolgt das Zuführen des Kühlmediums zu dem Reduktionsmitteleinspritzventil in einem vorgegebenen Zeitraum mit einer zeitlich konstanten Kühlmediumzufuhrrate. Damit ist eine einfache Steuerung des Zuführens des Kühlmittels möglich.In In a further advantageous embodiment, the feeding of the cooling medium to the reducing agent injection valve in a predetermined period of time with a time constant cooling medium feed rate. For a simple control of the supply of the coolant is possible.
In einer weiteren vorteilhaften Ausführungsform wird eine Kenngröße für einen NOx-Gehalt in dem Abgastrakt ermittelt, und das Stellsignal für das Stellglied zum Zuführen des Kühlmediums zu dem Reduktionsmitteleinspritzventil wird abhängig von der Kenngröße für den NOx-Gehalt in dem Abgastrakt ermittelt. Damit kann ein Durchbruch von Ammoniak am SCR-Katalysator vermieden werden.In In another advantageous embodiment, a parameter for a NOx content in the exhaust tract determined, and the actuating signal for the actuator for feeding of the cooling medium to the reducing agent injection valve becomes dependent on the NO x content characteristic determined in the exhaust system. This can be a breakthrough of ammonia on the SCR catalyst be avoided.
In einer weiteren vorteilhaften Ausführungsform wird das Kühlmedium in den Abgastrakt eingebracht. Dies hat den Vorteil, dass das Kühlmittel im Hinblick auf eine Kühlung besonders effizient auf das Reduktionsmitteleinspritzventil aufgebracht werden kann.In In a further advantageous embodiment, the cooling medium introduced into the exhaust tract. This has the advantage of having the coolant with a view to cooling particularly efficiently applied to the reducing agent injection valve can be.
In einer weiteren vorteilhaften Ausführungsform ist das Kühlmedium das Reduktionsmittel. Damit kann ein einziges Medium sowohl als Kühlmittel als auch als Reduktionsmittel eingesetzt werden.In A further advantageous embodiment is the cooling medium the reducing agent. This allows a single medium both as Coolant as also be used as a reducing agent.
In einer weiteren vorteilhaften Ausführungsform wird das Kühlmedium dem Reduktionsmitteleinspritzventil bei einem Stillstand der Brennkraftmaschine zugeführt. Dies hat den Vorteil, dass ein nachträgliches Überhitzen des Reduktionsmittelventils auch nach einem Abschalten der Brennkraftmaschine vermieden werden kann.In In a further advantageous embodiment, the cooling medium the reducing agent injection valve at a standstill of the internal combustion engine fed. This has the advantage that a subsequent overheating of the reducing agent valve also can be avoided after switching off the internal combustion engine.
In einer weiteren vorteilhaften Ausführungsform wird das Kühlmedium aus dem Reduktionsmittelzuführsystem abgeführt, wenn dem Reduktionsmitteleinspritzventil kein Kühlmedium zugeführt wird. Dies hat den Vorteil, dass durch Abführen von warmem Kühlmedium und späterem erneuten Zuführen von kühlem Kühlmedium zu dem Reduktionsmittelzuführsystem eine sehr gute Kühlung des Reduktionsmitteleinspritzventils möglich ist, sobald das Reduktionsmitteleinspritzventil wieder mit Kühlmedium beaufschlagt wird.In In a further advantageous embodiment, the cooling medium from the reductant delivery system dissipated if no cooling medium is supplied to the reducing agent injection valve. This has the advantage that by discharging of warm cooling medium and later re-feeding from cool cooling medium to the reductant delivery system a very good cooling of the reducing agent injection valve is possible as soon as the reducing agent injection valve again with cooling medium is charged.
In einer weiteren vorteilhaften Ausführungsform wirkt sich eine Stellung des Stellglieds zum Zuführen des Kühlmediums zu dem Reduktionsmitteleinspritzventil auf eine Ammoniakmasse aus, die dem SCR-Katalysator zugeführt wird. Dies stellt eine einfache Möglichkeit dar, die Ammoniakmasse in geeigneter Weise zuzumessen.In a further advantageous embodiment, a affects Position of the actuator for feeding of the cooling medium to the reducing agent injection valve to an ammonia mass, fed to the SCR catalyst becomes. This is a simple way, the ammonia mass to measure appropriately.
Ausführungsbeispiele der Erfindung sind im Folgenden anhand von schematischen Zeichnungen näher erläutert.embodiments The invention are explained in more detail below with reference to schematic drawings.
Es zeigen:It demonstrate:
Elemente gleicher Konstruktion oder Funktion sind figurenübergreifend mit den gleichen Bezugszeichen gekennzeichnet.elements same construction or function are cross-figurative with the same Reference number marked.
In
Der
Zylinderkopf
In
dem Abgastrakt
Die
Brennkraftmaschine weist ferner eine Steuervorrichtung
Die
Sensoren umfassen einen Pedalstellungsgeber
Stromaufwärts des
Partikelfilters
Ferner
ist ein Stickoxidsensor
Ferner
ist dem Abgastrakt
Zum
Zuführen
von Reduktionsmittel ragt das Reduktionsmitteleinspritzventil
Stromabwärts des
Brennraums
Neben dem Zylinder Z1 sind bevorzugt noch weitere Zylinder Z2 bis Z4 vorgesehen, denen ebenfalls entsprechende Stellglieder und gegebenenfalls Sensoren zugeordnet sind.Next the cylinder Z1 are preferably further cylinders Z2 to Z4 provided which also corresponding actuators and optionally sensors assigned.
Zum
Ausführen
des Verfahrens zum Steuern einer Abgasnachbehandlung für eine Brennkraftmaschine
kann in einem Programmspeicher der Steuervorrichtung
Ein
bevorzugter Ablauf des Programms ist in
In
einem Schritt
Einer
der Kühlungsmodi
MOD_COOL des Reduktionsmitteleinspritzventils
Ein
weiterer der Kühlungsmodi
MOD_COOL des Reduktionsmitteleinspritzventils
Vorzugsweise
erfolgt das Zuführen
des Kühlmediums
zu dem Reduktionsmitteleinspritzventil
Ein
weiterer der Kühlungsmodi
MOD_COOL des Reduktionsmitteleinspritzventils
In
einem Modell
Mittels
dieses Verfahrens ist es möglich,
das Reduktionsmitteleinspritzventil
Claims (10)
Priority Applications (1)
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DE102008052988A DE102008052988B4 (en) | 2008-10-23 | 2008-10-23 | Method and apparatus for controlling exhaust aftertreatment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102008052988A DE102008052988B4 (en) | 2008-10-23 | 2008-10-23 | Method and apparatus for controlling exhaust aftertreatment |
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DE102008052988A1 true DE102008052988A1 (en) | 2010-04-29 |
DE102008052988B4 DE102008052988B4 (en) | 2012-09-27 |
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DE102012206563A1 (en) * | 2012-04-20 | 2013-10-24 | Bayerische Motoren Werke Aktiengesellschaft | Selective catalytic reduction arrangement for reducing nitrogen oxides in exhaust gas of vehicle, has flow controller for controlling coolant flow rate of coolant circuit and dosing module for introducing reducing agent into exhaust system |
US9091193B2 (en) | 2013-12-13 | 2015-07-28 | Cnh Industrial America Llc | Systems and methods for cooling a diesel exhaust fluid dosing module of an agricultural vehicle |
US9200557B2 (en) | 2010-06-21 | 2015-12-01 | Scania Cv Ab | Method pertaining to air removal from a dosing system at an SCR system and a SCR system |
RU2634983C2 (en) * | 2013-06-06 | 2017-11-08 | Камминз Эмишн Солюшн Инк. | Injector cooling systems and methods for liquid injection systems in exhaust diesel engine systems |
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2008
- 2008-10-23 DE DE102008052988A patent/DE102008052988B4/en active Active
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DE4436397A1 (en) * | 1994-10-12 | 1996-04-18 | Bosch Gmbh Robert | Exhaust gas aftertreatment device |
DE19806265C1 (en) * | 1998-02-16 | 1999-07-22 | Siemens Ag | Low-maintenance system dosing urea solution into exhaust or effluent gases, for selective catalytic reduction |
DE19847388A1 (en) * | 1998-10-14 | 2000-04-20 | Daimler Chrysler Ag | Fuel injection system for IC engines has nozzles cooled by fuel flowing through dependent upon engine RPM and turbo charger loading pressure |
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WO2011162690A1 (en) * | 2010-06-21 | 2011-12-29 | Scania Cv Ab | Method and device pertaining to cooling of dosing units of scr systems |
RU2556946C2 (en) * | 2010-06-21 | 2015-07-20 | Сканиа Св Аб | Method and device relating cooling of dosing units of scr system |
US9200557B2 (en) | 2010-06-21 | 2015-12-01 | Scania Cv Ab | Method pertaining to air removal from a dosing system at an SCR system and a SCR system |
US9523299B2 (en) | 2010-06-21 | 2016-12-20 | Scania Cv Ab | Method and device pertaining to cooling of dosing units of SCR systems |
US9624807B2 (en) | 2010-06-21 | 2017-04-18 | Scania Cv Ab | Method pertaining to air removal from a liquid supply system and a liquid supply system |
DE102012206563A1 (en) * | 2012-04-20 | 2013-10-24 | Bayerische Motoren Werke Aktiengesellschaft | Selective catalytic reduction arrangement for reducing nitrogen oxides in exhaust gas of vehicle, has flow controller for controlling coolant flow rate of coolant circuit and dosing module for introducing reducing agent into exhaust system |
RU2634983C2 (en) * | 2013-06-06 | 2017-11-08 | Камминз Эмишн Солюшн Инк. | Injector cooling systems and methods for liquid injection systems in exhaust diesel engine systems |
US9091193B2 (en) | 2013-12-13 | 2015-07-28 | Cnh Industrial America Llc | Systems and methods for cooling a diesel exhaust fluid dosing module of an agricultural vehicle |
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DE102008052988B4 (en) | 2012-09-27 |
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