DE102008041326A1 - Urea injection valve for after-treatment of exhaust gas of diesel engine in e.g. passenger car, has temperature-subjected component partially provided with sodium material for protecting component from exceeding maximum temperature - Google Patents
Urea injection valve for after-treatment of exhaust gas of diesel engine in e.g. passenger car, has temperature-subjected component partially provided with sodium material for protecting component from exceeding maximum temperature Download PDFInfo
- Publication number
- DE102008041326A1 DE102008041326A1 DE102008041326A DE102008041326A DE102008041326A1 DE 102008041326 A1 DE102008041326 A1 DE 102008041326A1 DE 102008041326 A DE102008041326 A DE 102008041326A DE 102008041326 A DE102008041326 A DE 102008041326A DE 102008041326 A1 DE102008041326 A1 DE 102008041326A1
- Authority
- DE
- Germany
- Prior art keywords
- valve
- temperature
- component
- exhaust gas
- injection valve
- 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.)
- Withdrawn
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
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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
- F01N13/14—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 thermal insulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
-
- 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
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Stand der TechnikState of the art
Die Erfindung geht aus von einer Vorrichtung zur Nachbehandlung des Abgases einer Brennkraftmaschine nach der Gattung des unabhängigen Anspruchs.The The invention is based on a device for the aftertreatment of Exhaust gases of an internal combustion engine according to the type of independent Claim.
Um Stickoxide im Abgasstrom eines Dieselmotors reduzieren zu können, kann eine wässrige Harnstofflösung (AdBlue) über ein Dosiermodul in den Abgastrakt eines Personen- oder Lastkraftwagens eingespritzt werden. Das Dosiermodul wird dazu direkt an das Abgasrohr angebracht. Durch den Wärmefluß vom Abgasrohr in das Dosiermodul beziehungsweise durch applikationsbedingt hohe Umgebungstemperaturen (zum Beispiel in der Nähe eines Partikelfilters) kann sich das Dosiermodul stark aufheizen, was sich schädlich auf die Dauerhaltbarkeit und die Funktion auswirken kann. In Kombination mit der eingespritzten Harnstoff-Wasser-Lösung, die ab Temperaturen von 80 Grad Celsius schnell altert und die korrosiven Zerfallsprodukte Ammoniak und Kohlendioxid bildet, reagieren metallische Werkstoffe beziehungsweise sie korrodieren. Je höher die Temperatur, desto stärker ist der korrosive Angriff auf das Dosiermodul. Als Folge davon können Dichtheitsprobleme und eine Fehlmengendosierung auftreten. Wird das Dosiermodul überhitzt, könnten bei hohen Temperaturen auch in diesem Bereich verwendete Kunststoffmaterialien schmelzen bzw. die wässrige Harnstofflösung im Dosiermodul zum Kochen kommen.Around To be able to reduce nitrogen oxides in the exhaust gas flow of a diesel engine, can be an aqueous urea solution (AdBlue) over a dosing in the exhaust system of a passenger or truck be injected. The dosing module is for this purpose directly to the exhaust pipe appropriate. By the heat flow from the exhaust pipe in the dosing or by application high Ambient temperatures (for example near a particulate filter) The dosing module can heat up strongly, which can be harmful affect durability and function. In combination with the injected urea-water solution, which starts from temperatures from 80 degrees Celsius rapidly aging and the corrosive decay products Ammonia and carbon dioxide forms, react metallic materials or they corrode. The higher the temperature, the stronger is the corrosive attack on the dosing module. As a result, you can Tightness problems and a Fehlmengendosierung occur. Becomes the dosing module overheated, could at high temperatures plastic materials used in this area also melt or the aqueous urea solution in the metering module come to a boil.
Aus
der
Aus
der
Offenbarung der ErfindungDisclosure of the invention
Die erfindungsgemäße Vorrichtung zur Nachbehandlung des Abgases einer Brennkraftmaschine mit den kennzeichnenden Merkmalen des unabhängigen Anspruchs hat demgegenüber den Vorteil, ein temperaturbeaufschlagtes Bauteil mittels einer raumsparenden Maßnahme effektiv vor dem Erreichen von für die Lebensdauer abträglichen Temperaturbedingungen zu schützen und temperaturausgleichend zu wirken; es fallen keine zusätzlichen Maßnahmen beispielsweise für eine aktive Kühlung an.The Inventive device for aftertreatment the exhaust gas of an internal combustion engine with the characterizing features the independent claim has the other hand Advantage, a temperaturbeaufschlagtes component by means of a space-saving Measure effectively before reaching for the To protect service life against adverse temperature conditions and to counterbalance temperature; there are no additional measures for example, for an active cooling.
Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im unabhängigen Anspruch angegebenen Vorrichtung zur Nachbehandlung von Abgasen möglich.By those listed in the dependent claims Measures are advantageous developments and improvements the device specified in the independent claim for After treatment of exhaust gases possible.
Besonders vorteilhaft ist es, einen insbesondere in der Form angepassten Schutzkörper über ein an sich bereits bekanntes Bauteil überzustülpen, wodurch keine weiteren konstruktiven Maßnahmen erforderlich sind.Especially It is advantageous over a specially adapted in the form of protective body to impose a component which is already known per se, which requires no further constructional measures are.
Des Weiteren ist es vorteilhaft, einzelne Funktionskomponenten des temperaturbeaufschlagten Bauteils derart zu modifizieren, dass sie Wärmeeinträge abpuffern und wärmeausgleichend wirken, insbesondere solche Funktionskomponenten, die der Hitzequelle wie einem Abgasstrang zugewandt sind.Of Furthermore, it is advantageous to individual functional components of the temperature-sensitive Component to modify such that they heat inputs buffers and heat balancing act, especially those Functional components of the heat source such as an exhaust line are facing.
Weitere Vorteile ergeben sich durch die weiteren in den weiteren abhängigen Ansprüchen und in der Beschreibung genannten Merkmale.Further Benefits result from the others in the other dependent Claims and features mentioned in the description.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigenembodiments The invention are illustrated in the drawing and in the following description explained in more detail. Show it
Ausführungsformen der Erfindungembodiments the invention
Das
dargestellte Einspritzventil
In ähnlicher
Weise wie ein außen angebrachtes, mit Natrium befülltes
Behältnis
Der
funktionsempfindlichste Bereich eines Dosiermoduls zur Einbringung
eines Hilfsmittels in den Abgastrakt ist das Dosier- bzw. Einspritzventil. Dieses
soll vor hohen Temperaturen oberhalb von 80 Grad Celsius geschützt
werden. Ein ein- bzw. angebauter Latentwärmespeicher kann
die auftretenden hohen Temperaturen abpuffern und die Gesamttemperatur
in empfindlichen Bereichen in einem unteren Temperaturbereich halten.
Ein Latentwärmespeicher ist eine Einrichtung, die thermische
Energie verlustarm, mit vielen Wiederholzyklen und über
lange Zeit speichern kann. Als Latentwärmespeicher kommen neben
dem bereits beschriebenen Natrium auch andere Alkalimetalle sowie
Paraffine oder Salze in Betracht. Besonders geeignet sind Stoffe,
deren Schmelzpunkt zwischen 80 und 100 Grad Celsius liegt und die
nicht sublimieren. Die außen angebrachte Isolationsschicht
In
einer alternativen Ausführungsform kann der Latentwärmespeicher
wie in
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES 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 The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 102006061730 [0003] - DE 102006061730 [0003]
- - DE 4436397 [0004] - DE 4436397 [0004]
Claims (18)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008041326A DE102008041326A1 (en) | 2008-08-19 | 2008-08-19 | Urea injection valve for after-treatment of exhaust gas of diesel engine in e.g. passenger car, has temperature-subjected component partially provided with sodium material for protecting component from exceeding maximum temperature |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008041326A DE102008041326A1 (en) | 2008-08-19 | 2008-08-19 | Urea injection valve for after-treatment of exhaust gas of diesel engine in e.g. passenger car, has temperature-subjected component partially provided with sodium material for protecting component from exceeding maximum temperature |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008041326A1 true DE102008041326A1 (en) | 2010-02-25 |
Family
ID=41566827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008041326A Withdrawn DE102008041326A1 (en) | 2008-08-19 | 2008-08-19 | Urea injection valve for after-treatment of exhaust gas of diesel engine in e.g. passenger car, has temperature-subjected component partially provided with sodium material for protecting component from exceeding maximum temperature |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102008041326A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012022705A1 (en) | 2012-11-21 | 2014-05-22 | Daimler Ag | Metering device for introducing reducing agent solution into exhaust pipe of vehicle, has heat accumulator having annular solid structure for receiving heat input into outlet, to limit rise in outlet temperature |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4436397A1 (en) | 1994-10-12 | 1996-04-18 | Bosch Gmbh Robert | Exhaust gas aftertreatment device |
DE102006061730A1 (en) | 2006-12-28 | 2008-07-03 | Robert Bosch Gmbh | Selective catalytic reduction injection device for use in internal combustion engine, has sleeve including elongated thin-walled connecting section connected indirectly and positively to axial end by flange |
-
2008
- 2008-08-19 DE DE102008041326A patent/DE102008041326A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4436397A1 (en) | 1994-10-12 | 1996-04-18 | Bosch Gmbh Robert | Exhaust gas aftertreatment device |
DE102006061730A1 (en) | 2006-12-28 | 2008-07-03 | Robert Bosch Gmbh | Selective catalytic reduction injection device for use in internal combustion engine, has sleeve including elongated thin-walled connecting section connected indirectly and positively to axial end by flange |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012022705A1 (en) | 2012-11-21 | 2014-05-22 | Daimler Ag | Metering device for introducing reducing agent solution into exhaust pipe of vehicle, has heat accumulator having annular solid structure for receiving heat input into outlet, to limit rise in outlet temperature |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R012 | Request for examination validly filed | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |