DE102012219033A1 - Device for providing liquid for use with exhaust gas treatment device for internal combustion engine of motor vehicle, has microwave device provided for thawing and/or heating liquid, and resonator arranged on tank bottom of tank - Google Patents
Device for providing liquid for use with exhaust gas treatment device for internal combustion engine of motor vehicle, has microwave device provided for thawing and/or heating liquid, and resonator arranged on tank bottom of tank Download PDFInfo
- Publication number
- DE102012219033A1 DE102012219033A1 DE201210219033 DE102012219033A DE102012219033A1 DE 102012219033 A1 DE102012219033 A1 DE 102012219033A1 DE 201210219033 DE201210219033 DE 201210219033 DE 102012219033 A DE102012219033 A DE 102012219033A DE 102012219033 A1 DE102012219033 A1 DE 102012219033A1
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- Prior art keywords
- liquid
- tank
- resonator
- microwave
- housing
- 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.)
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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]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/688—Circuits for monitoring or control for thawing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/70—Feed lines
- H05B6/705—Feed lines using microwave tuning
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/72—Radiators or antennas
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/80—Apparatus for specific applications
-
- 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
- F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
-
- 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
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
-
- 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
- F01N2900/1818—Concentration of the reducing agent
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2214/00—Aspects relating to resistive heating, induction heating and heating using microwaves, covered by groups H05B3/00, H05B6/00
- H05B2214/02—Heaters specially designed for de-icing or protection against icing
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (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 eine Einrichtung zum Bereitstellen einer Flüssigkeit, insbesondere eines flüssigen Abgasnachbehandlungsmittels, mit einem Tank zur Aufnahme und Lagerung der Flüssigkeit, und mit einer Mikrowelleneinrichtung zum Auftauen und/oder Erwärmen der Flüssigkeit. The invention relates to a device for providing a liquid, in particular a liquid exhaust aftertreatment agent, with a tank for receiving and storing the liquid, and with a microwave device for thawing and / or heating the liquid.
Weiterhin betrifft die Erfindung eine Abgasnachbehandlungseinrichtung für eine Brennkraftmaschine, insbesondere eines Kraftfahrzeugs, mit einer Einrichtung, wie sie obenstehend beschrieben wurde.Furthermore, the invention relates to an exhaust aftertreatment device for an internal combustion engine, in particular of a motor vehicle, with a device as described above.
Ferner betrifft die Erfindung ein Verfahren zum Betreiben einer derartigen Einrichtung. Furthermore, the invention relates to a method for operating such a device.
Stand der TechnikState of the art
Zur Reduktion von Stickoxid-Emissionen im Abgas von Dieselmotoren kommt häufig die sogenannte selektive katalytische Reduktion (selective catalytic reduction, SCR) zum Einsatz. Dabei wird eine Harnstoff-Wasser-Lösung als Abgasnachbehandlungsmittel dem Abgas beigemischt, um in einem dafür geeigneten Katalysator mit dem Abgas zu reagieren, sodass Stickoxide reduziert werden. Zum Bereitstellen des flüssigen Abgasnachbehandlungsmittels weisen entsprechende Fahrzeuge oder Abgasnachbehandlungseinrichtungen eine Einrichtung mit einem Tank zur Aufnahme und Lagerung der Flüssigkeit auf. Da flüssiges Abgasnachbehandlungsmittel bereits bei Temperaturen um –11°C gefriert, muss sichergestellt werden, dass auch bei niedrigen Umgebungstemperaturen flüssiges Abgasnachbehandlungsmittel zur Schadstoffreduktion zur Verfügung steht. Es müssen somit Mittel vorgesehen sein, mit welchen gefrorenes Abgasnachbehandlungsmittel erwärmt und gegebenenfalls aufgetaut werden kann. Aus der
Offenbarung der ErfindungDisclosure of the invention
Die Einrichtung mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass auf einfache und kostengünstige Art und Weise eine Aussage über zumindest einen Zustand der in dem Tank befindlichen Flüssigkeit getroffen werden kann. Hierzu ist erfindungsgemäß wenigstens ein elektromagnetischer Resonator in dem Tank angeordnet. Mittels des Resonators werden die in den Tank eingekoppelten Mikrowellen bevorzugt zur interferometrischen Messung genutzt und beispielsweise anhand der erfassten Inteferenzen der Mikrowellen auf die Zusammensetzung oder den Aggregatszustand der Flüssigkeit geschlossen. The device with the features of claim 1 has the advantage that a statement about at least one state of the liquid in the tank can be made in a simple and cost-effective manner. For this purpose, at least one electromagnetic resonator is arranged in the tank according to the invention. By means of the resonator, the microwaves coupled into the tank are preferably used for interferometric measurement and closed, for example, on the basis of the detected interferences of the microwaves on the composition or the state of aggregation of the liquid.
Vorzugsweise weist der Resonator ein insbesondere metallisches Gehäuse auf, wobei das Gehäuse eine, insbesondere nur eine Öffnung aufweist. Das Gehäuse des Resonators ist zweckmäßigerweise derart ausgebildet, dass durch das Gehäuse die Mikrowellen nicht hindurchgelangen können. Das Gehäuse weist hierzu vorzugsweise einen entsprechenden Schutzschirm auf. Dieser kann beispielsweise durch eine Metallisierung der Gehäuseoberfläche oder durch das Material des Gehäuses selbst, insbesondere wenn dieses aus einem Metall gefertigt ist, gebildet werden. Dadurch verbleibt an dem Resonator nur die, insbesondere die nur eine Öffnung, durch welche die von der Mikrowelleneinrichtung erzeugten Mikrowellen in das Gehäuse des Resonators gelangen können, so dass sich diese gezielt in dem Resonator ausbreiten können.Preferably, the resonator has a particular metallic housing, wherein the housing has one, in particular only one opening. The housing of the resonator is expediently designed such that the microwaves can not pass through the housing. For this purpose, the housing preferably has a corresponding protective screen. This can be formed for example by a metallization of the housing surface or by the material of the housing itself, in particular if this is made of a metal. As a result, only those openings, in particular only one opening, through which the microwaves generated by the microwave device can reach the housing of the resonator remain on the resonator so that they can spread in a targeted manner in the resonator.
Vorzugsweise weist der Resonator mehrere in dem Gehäuse angeordnete Antennen auf, die insbesondere zum Erfassen der in den Resonator gelangten Mikrowellen dienen. Die Mikrowellen werden somit an mehreren Stellen in dem Resonator erfasst und können entsprechend zur interferometrischen Messung genutzt werden. Die bekannte Form des Gehäuses sowie die Anordnung der Antennen erlaubt eine genaue Vorhersage des Interferenzmusters von stehenden Mikrowellen in dem Resonator bei bekannter Zusammensetzung der Flüssigkeit. So kann durch einen einfachen Vergleich der tatsächlich vorliegenden Interferenzen mit der erwarteten Interferenz auf zumindest einen Zustandswert der Flüssigkeit, beispielsweise auf den Aggregatszustand oder auf eine Verdünnung der Flüssigkeit, insbesondere des Abgasnachbehandlungsmittels durch ein Fremdmedium geschlossen werden. Preferably, the resonator has a plurality of antennas arranged in the housing, which serve in particular for detecting the microwaves that have entered the resonator. The microwaves are thus detected at several points in the resonator and can be used according to the interferometric measurement. The known shape of the housing as well as the arrangement of the antennas allows an accurate prediction of the interference pattern of standing microwaves in the resonator with known composition of the liquid. Thus, it can be concluded by a simple comparison of the interference actually present with the expected interference to at least one state value of the liquid, for example to the state of aggregation or to a dilution of the liquid, in particular the exhaust aftertreatment agent by a foreign medium.
Gemäß einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, dass die Öffnung des Gehäuses auf einer der Mikrowellenabstrahlvorrichtung der Mikrowelleneinrichtung zugewandten Seite des Gehäuses ausgebildet ist. Dadurch gelangen die von der Mikrowellenabstrahlvorrichtung abgestrahlten Mikrowellen direkt in den Resonator und können zur Interferenzmessung beziehungsweise zur interferometrischen Messung genutzt werden. According to an advantageous development of the invention, it is provided that the opening of the housing is formed on a side facing the Mikrowellenabstrahlvorrichtung the microwave device side of the housing. As a result, the microwaves radiated by the microwave radiation device arrive directly in the resonator and can be used for interference measurement or for interferometric measurement.
Bevorzugt ist vorgesehen, dass die Antennen des Resonators von der Mikrowellenabstrahlvorrichtung aus gesehen hintereinander liegend angeordnet sind. Besonders bevorzugt sind die Antennen in einer Reihe hintereinander liegend angeordnet. Hierdurch wird insgesamt die Qualität der Interferometriemessung erhöht. It is preferably provided that the antennas of the resonator are arranged one behind the other as viewed from the microwave radiation device. Particularly preferably, the antennas are arranged one behind the other in a row. This will increase the overall quality of the interferometry measurement.
Gemäß einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, dass der Resonator auf einem Tankboden des Tanks angeordnet ist. Durch die Anordnung auf dem Tankboden wird gewährleistet, dass in dem Resonator stets Flüssigkeit vorhanden ist und somit eine entsprechende Messung durchgeführt werden kann. According to an advantageous development of the invention it is provided that the resonator is arranged on a tank bottom of the tank. The arrangement on the bottom of the tank ensures that there is always liquid in the resonator and thus a corresponding measurement can be carried out.
Bevorzugt ist die Abstrahlvorrichtung neben dem Resonator auf dem Tankboden, also ebenfalls in dem Tank angeordnet. Der Resonator ist mit seiner Öffnung in dem Gehäuse entsprechend auf die Abstrahlvorrichtung ausgerichtet, sodass die von ihr ausgesandten Mikrowellen direkt durch die Öffnung in den Resonator eindringen und zur Messung genutzt werden können. Gemäß einer alternativen Ausführungsform ist bevorzugt vorgesehen, dass die Abstrahlvorrichtung zumindest auf Höhe des Resonators angeordnet ist. Dazu muss sich die Abstrahlvorrichtung nicht unbedingt innerhalb des Tanks befinden. Vielmehr ist es auch denkbar, die Abstrahlvorrichtung außerhalb des Tanks vorzusehen und zumindest einen Bereich einer Tankwand des Tanks für die Mikrowellen durchlässig auszubilden. Bevorzugt ist der Tank aus Kunststoff gefertigt und weist einen elektromagnetischen Schutzschirm auf. Dieser Schutzschirm ist zweckmäßigerweise im Bereich der Abstrahlvorrichtung unterbrochen, sodass die Mikrowellen ungehindert durch den Kunststoff in das Tankinnere durchdringen beziehungsweise in die Flüssigkeit eingekoppelt werden können. Sofern die Abstrahlvorrichtung zumindest auf Höhe des Resonators in und/oder an dem Tank angeordnet ist, wird gewährleistet, dass die Mikrowellen direkt in den Resonator eindringen können. Preferably, the emitting device is next to the resonator on the tank bottom, that is also arranged in the tank. The resonator is aligned with its opening in the housing corresponding to the radiating device, so that the microwaves emitted by it can penetrate directly through the opening in the resonator and used for the measurement. According to an alternative embodiment, it is preferably provided that the emitting device is arranged at least at the height of the resonator. For this purpose, the radiating device does not necessarily have to be inside the tank. Rather, it is also conceivable to provide the emitting device outside the tank and to form at least a portion of a tank wall of the tank for the microwaves permeable. Preferably, the tank is made of plastic and has an electromagnetic protective shield. This protective screen is expediently interrupted in the region of the emitting device, so that the microwaves can pass unhindered through the plastic into the interior of the tank or can be coupled into the liquid. If the emitting device is arranged at least at the height of the resonator in and / or on the tank, it is ensured that the microwaves can penetrate directly into the resonator.
Besonders bevorzugt ist eine Auswerteeinrichtung vorgesehen, die in Abhängigkeit von den durch den Resonator erfassten Interferenzen/Mikrowellen zumindest ein Zustandswert der Flüssigkeit bestimmt wird. Vorzugsweise handelt es sich bei dem Zustandswert um den Aggregatszustand und/oder die Zusammensetzung der Flüssigkeit. Particularly preferably, an evaluation device is provided, which is determined as a function of the interference / microwaves detected by the resonator at least one state value of the liquid. The state value is preferably the state of aggregation and / or the composition of the liquid.
Die erfindungsgemäße Abgasnachbehandlungseinrichtung mit den Merkmalen des Anspruchs 9 zeichnet sich durch eine Einrichtung aus, die wie obenstehend beschrieben ausgebildet ist.The exhaust gas after treatment device according to the invention with the features of
Das erfindungsgemäße Verfahren zum Betreiben der beschriebenen Einrichtung beziehungsweise der Abgasnachbehandlungseinrichtung sieht vor, dass zunächst mittels der Mikrowelleneinrichtung Mikrowellen in dem Tank erzeugt werden, und dass mittels des Resonators eine interferometrische Messung durchgeführt wird zum Bestimmen mindestens eines Zustandswerts der Flüssigkeit. Weitere Vorteile und Verfahrensschritte ergeben sich aus dem zuvor bereits Beschriebenen. The inventive method for operating the device described or the exhaust gas aftertreatment device provides that microwaves are first generated in the tank by means of the microwave device, and that an interferometric measurement is carried out by means of the resonator for determining at least one state value of the liquid. Further advantages and method steps result from the previously described.
Im Folgenden soll die Erfindung anhand der Zeichnung näher erläutert werden. In the following, the invention will be explained in more detail with reference to the drawing.
Dazu zeigenShow this
Die Einrichtung
Dem Tank
Die Mikrowelleneinrichtung
Weiterhin ist in dem Tank
Der Resonator
Das Gehäuse
Im Betrieb werden von der Abstrahlvorrichtung
Die wohlbestimmte Form des Resonators
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
- EP 2172629 B1 [0004] EP 2172629 B1 [0004]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210219033 DE102012219033A1 (en) | 2012-10-18 | 2012-10-18 | Device for providing liquid for use with exhaust gas treatment device for internal combustion engine of motor vehicle, has microwave device provided for thawing and/or heating liquid, and resonator arranged on tank bottom of tank |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210219033 DE102012219033A1 (en) | 2012-10-18 | 2012-10-18 | Device for providing liquid for use with exhaust gas treatment device for internal combustion engine of motor vehicle, has microwave device provided for thawing and/or heating liquid, and resonator arranged on tank bottom of tank |
Publications (1)
Publication Number | Publication Date |
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DE102012219033A1 true DE102012219033A1 (en) | 2014-04-24 |
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Application Number | Title | Priority Date | Filing Date |
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DE201210219033 Withdrawn DE102012219033A1 (en) | 2012-10-18 | 2012-10-18 | Device for providing liquid for use with exhaust gas treatment device for internal combustion engine of motor vehicle, has microwave device provided for thawing and/or heating liquid, and resonator arranged on tank bottom of tank |
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DE (1) | DE102012219033A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109374691A (en) * | 2018-10-19 | 2019-02-22 | 沈阳师范大学 | The device and method of microwave measurement graphite alkenes Dielectric constant changing rule |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2172629B1 (en) | 2008-10-01 | 2011-12-28 | Delphi Technologies, Inc. | Apparatus and method for maintaining a urea solution in a liquid state for treatment of diesel exhaust |
-
2012
- 2012-10-18 DE DE201210219033 patent/DE102012219033A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2172629B1 (en) | 2008-10-01 | 2011-12-28 | Delphi Technologies, Inc. | Apparatus and method for maintaining a urea solution in a liquid state for treatment of diesel exhaust |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109374691A (en) * | 2018-10-19 | 2019-02-22 | 沈阳师范大学 | The device and method of microwave measurement graphite alkenes Dielectric constant changing rule |
CN109374691B (en) * | 2018-10-19 | 2020-10-30 | 沈阳师范大学 | Device and method for measuring dielectric constant change rule of graphene solution by microwave |
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