DE102011101006A1 - Method for manufacturing watery urea solution in motor vehicle, involves supplying predetermined quantity of ammonia granulate and predetermined quantity of water belonging to quantity of ammonia granulate to mixing chamber - Google Patents
Method for manufacturing watery urea solution in motor vehicle, involves supplying predetermined quantity of ammonia granulate and predetermined quantity of water belonging to quantity of ammonia granulate to mixing chamber Download PDFInfo
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- DE102011101006A1 DE102011101006A1 DE102011101006A DE102011101006A DE102011101006A1 DE 102011101006 A1 DE102011101006 A1 DE 102011101006A1 DE 102011101006 A DE102011101006 A DE 102011101006A DE 102011101006 A DE102011101006 A DE 102011101006A DE 102011101006 A1 DE102011101006 A1 DE 102011101006A1
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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]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F21/00—Dissolving
- B01F21/10—Dissolving using driven stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
- B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
- B01F23/2132—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids using nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
- B01F31/44—Mixers with shaking, oscillating, or vibrating mechanisms with stirrers performing an oscillatory, vibratory or shaking movement
- B01F31/445—Mixers with shaking, oscillating, or vibrating mechanisms with stirrers performing an oscillatory, vibratory or shaking movement performing an oscillatory movement about an axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2112—Level of material in a container or the position or shape of the upper surface of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
- B01F35/2211—Amount of delivered fluid during a period
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/12—Adding substances to exhaust gases the substance being in solid form, e.g. pellets or powder
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung einer wässrigen Harnstofflösung in einem Kraftfahrzeug nach dem Oberbegriff des Patentanspruchs 1 sowie eine Vorrichtung zur Herstellung einer wässrigen Harnstofflösung nach dem Patentanspruch 8.The invention relates to a method for producing an aqueous urea solution in a motor vehicle according to the preamble of patent claim 1 and to an apparatus for producing an aqueous urea solution according to claim 8.
Zur Verminderung der Stickstoffemissionen von Verbrennungsmotoren wird bei Dieselmotoren ein Abgasreinigungssystem eingesetzt, welches auf der Basis der selektiven katalytischen Reduktion (SCR) arbeitet, bei dem vor dem SCR-Katalysator in den Abgasstrom eine wässrige Harnstofflösung eingespritzt wird. Diese Abgasreinigungstechnik wird schon vielfach in Nutzfahrzeugen angewendet, die die wässrige Harnstofflösung in einem HL-Tank (HL steht hier und nachfolgend für „Harnstofflösung”) mit sich führen. Die Tankgröße ist dabei von der Rohemission und dem Emissionsziel des jeweiligen Fahrzeugs abhängig. Da aber ein Nachtanken vom Fahrer des jeweiligen Kraftfahrzeugs nicht völlig problemlos durchgeführt werden kann, müssen derzeitige HL-Tanks in den Fahrzeugen verhältnismäßig groß dimensioniert sein, so dass das Nachtanken in der Werkstatt in Verbindung mit den in regelmäßigen Zeitintervallen durchgeführten Wartungsarbeiten vorgenommen werden kann.To reduce the nitrogen emissions of internal combustion engines, an exhaust gas purification system is used in diesel engines, which operates on the basis of selective catalytic reduction (SCR), in which an aqueous urea solution is injected into the exhaust gas stream before the SCR catalyst. This exhaust gas cleaning technology is already widely used in commercial vehicles, which carry the aqueous urea solution in a HL tank (HL stands here and below for "urea solution") with it. The tank size depends on the raw emissions and the emission target of the respective vehicle. However, since refueling by the driver of the respective motor vehicle can not be carried out completely without problems, current HL tanks in the vehicles must be of relatively large dimensions so that refueling in the workshop can be carried out in conjunction with the maintenance work carried out at regular intervals.
Ein Verfahren Zur Herstellung einer wässrigen Harnstofflösung mit einem Harnstoffanteil von 32,5% ist aus der
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung einer wässrigen Harnstofflösung anzugeben, welches in einem Kraftfahrzeug auf möglichst einfache Weise durchführbar ist.The invention has for its object to provide a method for producing an aqueous urea solution, which is feasible in a motor vehicle in the simplest possible way.
Diese Aufgabe wird gelöst durch die Merkmale des Patentanspruchs 1. Bevorzugte Weiterbildungen des erfindungsgemäßen Verfahrens sind Gegenstand der Unteransprüche 2 bis 7.This object is achieved by the features of claim 1. Preferred developments of the method according to the invention are the subject of the dependent claims 2 to 7.
Erfindungsgemäß wird in einem Kraftfahrzeug zunächst eine vorgegebene Menge Ammoniakgranulat einer mit Wasser befüllbaren Mischkammer zugeführt, in der durch einen Mischvorgang eine wässrige Harnstofflösung hergestellt wird. Diese wässrige Harnstofflösung wird dann aus der Mischkammer einem HL-Tank zugeführt, aus dem die wässrige Harnstofflösung als Reduktionsmittel für die selektive katalytische Reduktion entnehmbar ist. Dabei kann die Entnahme des Reduktionsmittels aus dem HL-Tank in herkömmlicher Weise über eine Dosiereinrichtung mit einem Dosierventil erfolgen, welches die wässrige Harnstofflösung in den Abgasstrom einspritzt.According to the invention, a predetermined amount of ammonia granules is first supplied to a water-fillable mixing chamber in a motor vehicle, in which an aqueous urea solution is produced by a mixing process. This aqueous urea solution is then supplied from the mixing chamber to an HL tank, from which the urea aqueous solution as a reducing agent for the selective catalytic reduction can be removed. In this case, the removal of the reducing agent from the HL tank can be carried out in a conventional manner via a metering device with a metering valve, which injects the aqueous urea solution into the exhaust gas stream.
Das erfindungsgemäße Verfahren hat den Vorteil, dass die Tankgrößen für den HL-Tank in den Fahrzeugen deutlich verkleinert werden können, so dass auch höhere Dosierungen von wässriger Harnstofflösung in den Abgasstrom problemlos möglich sind. Höhere Dosierungen können insbesondere dann erforderlich sein, wenn strengere Abgasvorschriften zu erfüllen sind. Da die wässrige Harnstofflösung im Kraftfahrzeug selbst hergestellt wird, ist keine flächendeckende Infrastruktur für entsprechende Tankstellen erforderlich. Vielmehr genügt es, wenn an den Tankstellen die Möglichkeit zum Nachfüllen mit geeignetem Wasser besteht und gegebenenfalls auch Ammoniakgranulat in geeigneten Nachfüllkartuschen oder anderen Behältern zur Verfügung steht.The inventive method has the advantage that the tank sizes for the HL-tank can be significantly reduced in the vehicles, so that even higher doses of aqueous urea solution in the exhaust stream are easily possible. Higher doses may be required in particular if stricter emission regulations are to be met. Since the aqueous urea solution is produced in the motor vehicle itself, no nationwide infrastructure for corresponding gas stations is required. Rather, it is sufficient if there is the possibility of refilling with suitable water at the gas stations and, where appropriate, also ammonia granules in suitable Nachfüllkartuschen or other containers is available.
Der Nachfüllvorgang zur Mischkammer kann so erfolgen, dass der Mischkammer immer jeweils so viel Wasser und Ammoniakgranulat zugeführt wird, dass sich daraus durch den Mischvorgang eine wässrige Harnstofflösung mit einem vorgegebenen Harnstoffanteil ergibt. Derzeit wird bevorzugt eine wässrige Harnstofflösung für das SCR-System verwendet, die einen Harnstoffanteil von 32,5% hat. Grundsätzlich besteht aber auch die Möglichkeit, wässrige Harnstofflösungen mit einem anderen Anteil an Harnstoff herzustellen.The refilling to the mixing chamber can be done so that the mixing chamber is always fed so much water and ammonia granules that it results from the mixing process, an aqueous urea solution with a given urea content. Currently, an aqueous urea solution is preferably used for the SCR system, which has a urea content of 32.5%. In principle, however, it is also possible to prepare aqueous urea solutions with a different proportion of urea.
Das Herstellungsverfahren für die wässrige Harnstofflösung kann mittels einer Steuerung so erfolgen, dass eine von ihr vorgegebene Menge wässriger Harnstofflösung in der Mischkammer hergestellt wird. Die Steuerung kann hierzu die entsprechende Menge Ammoniakgranulat und Wasser der Mischkammer zuführen, um einen vorgegebenen Harnstoffanteil in der hergestellten Harnstofflösung zu erhalten. Auf diese Weise können aus der Mischkammer entnommene Teilmengen wässriger Harnstofflösung hergestellt werden, um beispielsweise den Füllstand in der Mischkammer immer auf einen vorgegebenen Wert nach einer Entnahme einer Teilmenge zu bringen.The production process for the aqueous urea solution can be carried out by means of a controller so that a predetermined amount of aqueous urea solution is produced in the mixing chamber. For this purpose, the controller can supply the appropriate amount of ammonia granules and water to the mixing chamber in order to obtain a given urea content in the prepared urea solution. In this way, it is possible to produce subsets of aqueous urea solution taken from the mixing chamber in order to always bring, for example, the fill level in the mixing chamber to a predetermined value after removal of a subset.
Es besteht aber auch die Möglichkeit, in der Mischkammer immer eine gleiche Menge an wässriger Harnstofflösung herzustellen, wenn die Mischkammer völlig leer ist oder ein vorgegebener Mindestfüllstand erreicht ist. Der Dosiervorgang ist in diesem Fall etwas einfacher, da immer die gleiche Menge Wasser und die gleiche zugehörige Menge Ammoniakgranulat der Mischkammer zuzuführen sind.However, it is also possible to produce in the mixing chamber always an equal amount of aqueous urea solution when the mixing chamber is completely empty or a predetermined Minimum level is reached. The metering process is somewhat simpler in this case, since always the same amount of water and the same amount of ammonia granules are to be fed to the mixing chamber.
Die Herstellung von wässriger Harnstofflösung in der Mischkammer kann auch in Abhängigkeit vom Füllstand des HL-Tanks erfolgen. Weist dieser einen Mindestfüllstand auf, so kann mittels einer Steuerung der Herstellungsprozess in der Mischkammer veranlasst werden und dann die Zufuhr der fertiggestellten wässrigen Harnstofflösung zum HL-Tank veranlasst werden.The production of aqueous urea solution in the mixing chamber can also be carried out depending on the level of the HL tank. If this has a minimum fill level, the production process in the mixing chamber can be initiated by means of a controller, and then the supply of the finished aqueous urea solution to the HL tank can be initiated.
Das für den Mischvorgang erforderliche Wasser kann grundsätzlich vor jedem Mischvorgang über einen Wasseranschluss oder über einen Wassertank zugeführt werden. Besonders vorteilhaft ist es aber, wenn das benötigte Wasser wenigstens teilweise aus dem Abgasstrom mittels eines Kondensators gewonnen und zur Herstellung der wässrigen Harnstofflösung verwendet wird. Auf diese Weise können Nachtankintervalle zumindest vergrößert werden.The water required for the mixing process can in principle be supplied before each mixing process via a water connection or via a water tank. But it is particularly advantageous if the required water is at least partially recovered from the exhaust gas stream by means of a condenser and used to prepare the aqueous urea solution. In this way, night refueling intervals can at least be increased.
Der Erfindung liegt die weitere Aufgabe zugrunde, eine Vorrichtung zur Herstellung einer wässrigen Harnstofflösung in einem Kraftfahrzeug zu schaffen.The invention is based on the further object of providing a device for producing an aqueous urea solution in a motor vehicle.
Die Lösung dieser weiteren Aufgabe der Erfindung wird durch eine Vorrichtung mit den Merkmalen des Patentanspruchs 8 erhalten. Bevorzugte Weiterbildungen der Vorrichtung sind Gegenstand der hierauf rückbezogenen Unteransprüche 9 bis 15.The solution of this further object of the invention is obtained by a device having the features of claim 8. Preferred developments of the device are the subject of the
Erfindungsgemäß befindet sich im Kraftfahrzeug, welches ein auf der Basis der selektiven katalytischen Reduktion arbeitendes Abgasreinigungssystem hat, eine Mischkammer zur Herstellung von wässriger Harnstofflösung. Die Mischkammer ist an einen Behälter angeschlossen, über den Ammoniakgranulat der Mischkammer zuführbar ist. Außerdem besitzt die Mischkammer einen Wasseranschluss, um eine geeignete Menge Wasser der Mischkammer zuführen zu können. Die in der Mischkammer hergestellte wässrige Harnstofflösung wird über eine Übergabeeinrichtung dem HL-Tank zugeführt, der die wässrige Harnstofflösung zur Anwendung im Abgasreinigungssystem bereithält. Der Behälter für das Ammoniakgranulat kann dabei eine luftdicht auf die Mischkammer aufsetzbare Kartusche oder ein größerer Vorratsbehälter sein, aus dem Teilmengen von Ammoniakgranulat über eine Dosiervorrichtung entnommen werden können.According to the invention, in the motor vehicle, which has an exhaust gas purification system operating on the basis of the selective catalytic reduction, there is a mixing chamber for the production of aqueous urea solution. The mixing chamber is connected to a container through which ammonia granules can be fed to the mixing chamber. In addition, the mixing chamber has a water connection in order to be able to supply a suitable amount of water to the mixing chamber. The aqueous urea solution produced in the mixing chamber is fed via a transfer device to the HL tank, which holds the aqueous urea solution ready for use in the exhaust gas purification system. The container for the ammonia granules may be an airtight placed on the mixing chamber cartridge or a larger reservoir, can be removed from the subsets of ammonia granules via a metering device.
Der einfachste Aufbau der erfindungsgemäßen Vorrichtung benötigt keine Dosiervorrichtung für die Zufuhr von Ammoniakgranulat, wenn die Zufuhr von Ammoniakgranulat durch Kartuschen oder andere Behälter mit einer vorgegebenen Menge von Ammoniakgranulat erfolgt. In diesem Fall genügt es, für die zugeführte vorgegebene Menge von Ammoniakgranulat eine entsprechende Menge an Wasser in die Mischkammer zu leiten, um die beispielsweise geforderte wässrige Harnstofflösung mit einem Harnstoffanteil von 32,5% herstellen zu können. Wird dagegen eine Dosiervorrichtung für die Zufuhr von Ammoniakgranulat vorgesehen, so können beliebige Teilmengen von Ammoniakgranulat aus einem größeren Vorratsbehälter der Mischkammer zugeführt werden, wobei über eine Steuerung dann die jeweils für die verwendete Teilmenge zugehörige Menge an Wasser in die Mischkammer eingeleitet werden muss. Die aufwändigere Vorrichtung mit einer Dosiermöglichkeit für das Ammoniakgranulat hat den Vorteil, dass ein größerer Behälter für das Ammoniakgranulat verwendet werden kann und somit auch ein Nachfüllen dieses Behälters nur in größeren Zeitintervallen notwendig ist.The simplest construction of the device according to the invention requires no metering device for the supply of ammonia granules, when the supply of ammonia granules by cartridges or other containers with a predetermined amount of ammonia granules. In this case, it is sufficient to pass an appropriate amount of water into the mixing chamber for the supplied predetermined amount of ammonia granules in order to be able to produce the, for example, required aqueous urea solution with a urea content of 32.5%. If, however, a metering device for the supply of ammonia granules provided, so any subsets of ammonia granules can be supplied from a larger reservoir of the mixing chamber, via a controller then each of the subset associated amount of water must be introduced into the mixing chamber. The more complex device with a dosing option for the ammonia granules has the advantage that a larger container for the ammonia granules can be used and therefore refilling this container is necessary only in larger time intervals.
Vorteilhaft ist es, einen Kondensator im Abgasstrom vorzusehen, mit dem aus dem Abgasstrom Wasser gewonnen werden kann, welches direkt in die Mischkammer oder in einen Wassertank geleitet werden kann. Die Wasser-Nachfüllintervalle lassen sich dadurch verlängern.It is advantageous to provide a condenser in the exhaust gas stream, with which water can be obtained from the exhaust gas stream, which can be passed directly into the mixing chamber or into a water tank. The water refill intervals can be extended thereby.
Werden zum Nachfüllen von Ammoniakgranulat Kartuschen verwendet, die eine vorgegebene Menge an Ammoniakgranulat enthalten, so kann der Mischkammer auch eine zur Herstellung einer vorgegebenen wässrigen Harnstofflösung erforderliche Menge an Wasser mittels einer Wasserkartusche zugeführt werden, in der sich genau die erforderliche Wassermenge befindet. Das gesamte Nachfüllsystem kann somit aus Kartuschen bestehen, die einerseits Ammoniakgranulat und andererseits die erforderliche Wassermenge enthalten. Bei einem solchen Kartuschensystem sind keinerlei Vorratsbehälter für Wasser und Ammoniakgranulat erforderlich, sondern nur ein geeigneter Anschlussstutzen, der zur Mischkammer führt und über den die Menge an Ammoniakgranulat und Wasser der Mischkammer zugegeben werden kann.If cartridges containing a predetermined amount of ammonia granules are used to replenish ammonia granules, then the mixing chamber can also be supplied with a quantity of water required for producing a given aqueous urea solution by means of a water cartridge in which exactly the required amount of water is. The entire refill system can thus consist of cartridges containing on the one hand ammonia granules and on the other hand the required amount of water. In such a cartridge system no reservoir for water and ammonia granules are required, but only a suitable connection piece, which leads to the mixing chamber and over which the amount of ammonia granules and water of the mixing chamber can be added.
Die Füllstände in der Mischkammer und/oder im HL-Tank können über Füllstandssensoren in Verbindung mit einer Steuerung überwacht werden, um bei Erreichen eines Mindestfüllstandes einen Nachfüllvorgang bzw. einen Vorgang zur Herstellung wässriger Harnstofflösung zu starten. Auf diese Weise wird sichergestellt, dass im HL-Tank immer eine ausreichende Menge an wässriger Harnstofflösung zur Anwendung im Abgasreinigungssystem zur Verfügung steht.The fill levels in the mixing chamber and / or in the HL tank can be monitored by level sensors in conjunction with a controller to start a refilling process or a process for producing aqueous urea solution upon reaching a minimum level. In this way it is ensured that in the HL tank always a sufficient amount of aqueous urea solution for use in the exhaust gas cleaning system is available.
In Abhängigkeit von den Füllständen kann die Steuerung auch eine Anzeige aktivieren, um dem Fahrer des Kraftfahrzeugs zu signalisieren, dass dieser Ammoniakgranulat und/oder Wasser nachfüllen soll.Depending on the levels, the controller may also activate a display to signal the driver of the motor vehicle that this ammonia granules and / or water should refill.
Die Erfindung wird anhand eines in der Zeichnung in
Eine zentrale Steuerung
Die Mischkammer
An dem Wasseranschluss
Der Mischvorgang zur Herstellung einer wässrigen Harnstofflösung in der Mischkammer
Das anhand von
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102009005677 A1 [0003] DE 102009005677 A1 [0003]
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DE102011101006A DE102011101006A1 (en) | 2011-05-10 | 2011-05-10 | Method for manufacturing watery urea solution in motor vehicle, involves supplying predetermined quantity of ammonia granulate and predetermined quantity of water belonging to quantity of ammonia granulate to mixing chamber |
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DE102011101006A DE102011101006A1 (en) | 2011-05-10 | 2011-05-10 | Method for manufacturing watery urea solution in motor vehicle, involves supplying predetermined quantity of ammonia granulate and predetermined quantity of water belonging to quantity of ammonia granulate to mixing chamber |
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DE102011101006A Withdrawn DE102011101006A1 (en) | 2011-05-10 | 2011-05-10 | Method for manufacturing watery urea solution in motor vehicle, involves supplying predetermined quantity of ammonia granulate and predetermined quantity of water belonging to quantity of ammonia granulate to mixing chamber |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201800002724A1 (en) * | 2018-02-15 | 2019-08-15 | Magneti Marelli Spa | DEVICE FOR THE PRODUCTION OF WATER ON BOARD A VEHICLE AND METHOD FOR THE CONTROL OF SAID DEVICE |
DE102023110475A1 (en) | 2022-04-26 | 2023-10-26 | Avl List Gmbh | HYDROGEN POWERED COMBUSTION ENGINE |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19918591A1 (en) * | 1999-04-23 | 2000-10-26 | Fev Motorentech Gmbh | Engine operation making good use of water from exhaust gases, recovers water with advanced membrane, to be injected in air inlet manifold and to be mixed with solid urea for injection into exhaust ahead of catalyst |
DE10038741A1 (en) * | 2000-08-09 | 2002-02-21 | Porsche Ag | Introducing reductant into catalytic arrangement involves producing reductant solution from solid reductant and solvent, storing solution in container and feeding to catalytic arrangement |
DE102009005677A1 (en) | 2009-01-22 | 2010-08-05 | Kruse Gmbh & Co. Kg | Process and apparatus for producing high-purity urea solution |
-
2011
- 2011-05-10 DE DE102011101006A patent/DE102011101006A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19918591A1 (en) * | 1999-04-23 | 2000-10-26 | Fev Motorentech Gmbh | Engine operation making good use of water from exhaust gases, recovers water with advanced membrane, to be injected in air inlet manifold and to be mixed with solid urea for injection into exhaust ahead of catalyst |
DE10038741A1 (en) * | 2000-08-09 | 2002-02-21 | Porsche Ag | Introducing reductant into catalytic arrangement involves producing reductant solution from solid reductant and solvent, storing solution in container and feeding to catalytic arrangement |
DE102009005677A1 (en) | 2009-01-22 | 2010-08-05 | Kruse Gmbh & Co. Kg | Process and apparatus for producing high-purity urea solution |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201800002724A1 (en) * | 2018-02-15 | 2019-08-15 | Magneti Marelli Spa | DEVICE FOR THE PRODUCTION OF WATER ON BOARD A VEHICLE AND METHOD FOR THE CONTROL OF SAID DEVICE |
EP3527726A1 (en) * | 2018-02-15 | 2019-08-21 | Magneti Marelli S.p.A. | Device for the production of water on board a vehicle and method to control said device |
DE102023110475A1 (en) | 2022-04-26 | 2023-10-26 | Avl List Gmbh | HYDROGEN POWERED COMBUSTION ENGINE |
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