DE10319841A1 - Device for treating diesel engine exhaust gases comprises storage tank for urea-water solution, and air line which opens into tank - Google Patents
Device for treating diesel engine exhaust gases comprises storage tank for urea-water solution, and air line which opens into tank Download PDFInfo
- Publication number
- DE10319841A1 DE10319841A1 DE2003119841 DE10319841A DE10319841A1 DE 10319841 A1 DE10319841 A1 DE 10319841A1 DE 2003119841 DE2003119841 DE 2003119841 DE 10319841 A DE10319841 A DE 10319841A DE 10319841 A1 DE10319841 A1 DE 10319841A1
- Authority
- DE
- Germany
- Prior art keywords
- storage tank
- water solution
- line
- air line
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
- B01D53/9454—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- 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
-
- 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)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Exhaust Gas After Treatment (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
Description
Die Erfindung betrifft eine Einrichtung zur Abgasnachbehandlung in Dieselfahrzeugen nach dem Oberbegriff des Anspruches 1.The The invention relates to a device for exhaust gas aftertreatment in diesel vehicles according to the preamble of claim 1.
Für die Abgasnachbehandlung
in Dieselverbrennungsmotoren, vorzugsweise in Lastkraftwagen und
Personenkraftwagen, ist es notwendig, die Stickoxide im Abgas durch
einen zusätzlichen
SCR-Katalysator
(selective catalytic reduction) zu verringern.
Die eindosierte Menge an Harnstoffwasserlösung muß durch das Einspritzventil, abhängig vom jeweiligen Fahrzustand, hochgenau zugemessen werden. Bei dieser bekannten Einrichtung ist der zusätzliche Luftverbrauch im Fahrzeug sehr hoch. Da im Fahrzeug ohnehin ein Mangel an Druckluft herrscht, wirkt sich der zusätzliche Luftverbrauch sehr nachteilig aus. Da die Harnstoffwasserlösung bei –11°C gefriert und dabei eine Volumenzunahme um etwa 8% erfährt, sind die harnstoffwasserführenden Bauteile der Einrichtung entsprechenden Belastungen ausgesetzt. Sie können durch handelsübliche Bauteile nicht kompensiert werden. Darum müssen teure Sonderlösungen entwickelt und eingesetzt werden.The the metered amount of urea water solution must pass through the injection valve, dependent depending on the driving condition, be measured with high precision. At this known device is the additional air consumption in the vehicle very high. Since there is already a shortage of compressed air in the vehicle, affects the additional Air consumption very disadvantageous. Because the urea water solution freezes at –11 ° C and experiencing an increase in volume of about 8%, the urea water are Components of the facility exposed to appropriate loads. You can through commercially available components cannot be compensated. That is why expensive special solutions have to be developed and be used.
Beim Auftauen der Einrichtung ist es schwierig festzustellen, ab welchem Zeitpunkt die Einrichtung wieder eisfrei und damit einsetzbar ist. Es ist darum eine entsprechende Zeitspanne als Sicherheit in der Steuerung der Einrichtung vorzusehen. Während dieser Zeitspanne ist die Einrichtung nach dem Auftauen noch außer Funktion. Ferner sind für die Förderung und Dosierung der Harnstoffwasserlösung sehr viele und sehr teure Komponenten notwendig, die außerdem ein hohes Gewicht haben und einen großen Bauraum benötigen. Um die Werte der verschiedenen Sensoren der Einrichtung zu verarbeiten und die unterschiedlichen Komponenten anzusteuern, ist ein separates Steuergerät erforderlich. Außerdem sind aufgrund der notwendigen Sicherheitsabfragen und Überwachungsfunktionen viele Programmschritte notwendig.At the Defrosting the device makes it difficult to determine which one When the facility is ice-free again and can therefore be used. It is therefore a corresponding period of time as security in the Provide control of the facility. During this period is the device is still inoperative after thawing. Also for funding and dosage of the urea water solution very many and very expensive Components necessary that also have a heavy weight and require a large installation space. Around process the values of the various sensors of the facility and Controlling the different components is a separate one control unit required. Moreover are due to the necessary security queries and monitoring functions many program steps necessary.
Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Einrichtung so auszubilden, daß bei konstruktiv einfacher und kostengünstiger Ausbildung eine hochgenaue Dosierung der Harnstoffwasserlösung bei minimalem Einsatz von Druckluft gewährleistet ist.The The invention is based on the object of the generic device to train so that at structurally simple and inexpensive training a highly accurate Dosage of the urea water solution guaranteed with minimal use of compressed air.
Diese Aufgabe wird bei der gattungsgemäßen Einrichtung erfindungsgemäß mit den kennzeichnenden Merkmalen des Anspruches 1 gelöst.This Task is in the generic establishment according to the invention with the characterizing features of claim 1 solved.
Bei der erfindungsgemäßen Einrichtung ist der Vorratstank druckdicht ausgebildet. Dadurch ist nur eine sehr geringe Luftmenge aus dem Fahrzeugdruckluftnetz erforderlich. Die Druckluftleitung mündet in den druckdichten Vorratstank und hält dadurch die in ihm befindliche Harnstoffwasserlösung unter Druck. Sie kann darum unter diesem Druck dem Einspritzventil ohne Einsatz einer Pumpe und eines Motors zugeführt werden. Die erfindungsgemäße Einrichtung zeichnet sich aus diesem Grunde durch eine geringe Zahl von Bauteilen aus. Wenn bei entsprechenden tiefen Außentemperaturen die Harnstoffwasserlösung gefriert, wird diese Lösung auch im eingefrorenen Zustand durch die Druckluft unter Druck gesetzt. Sobald die eingefrorene Lösung auftaut, beginnt sofort die Förderung. Darum ist ein frühestmöglicher Einsatz der Einrichtung nach dem Auftauen gewährleistet. Insbesondere muß keine Sicherheitszeitspanne vorgesehen werden.at the device according to the invention the storage tank is designed to be pressure-tight. This is only one very small amount of air from the vehicle compressed air network required. The compressed air line opens in the pressure-tight storage tank and thereby holds the one in it Urea solution vacuum. You can therefore the injection valve under this pressure can be supplied without the use of a pump and a motor. The device according to the invention is characterized by a small number of components out. If the urea water solution freezes at correspondingly low outside temperatures, will this solution pressurized by compressed air even when frozen. Once the frozen solution thaws, funding begins immediately. That is why it is the earliest possible Use of the device after thawing guaranteed. In particular, no Safety period should be provided.
Weitere Merkmale der Erfindung ergeben sich aus den weiteren Ansprüchen, der Beschreibung und der Zeichnung.Further Features of the invention result from the further claims that Description and the drawing.
In
den Vorratstank
Die
in die Förderleitung
Der
Druck in der Förderleitung
Zum
Befüllen
des Vorratstankes
Die
Druckentlastung des Vorratstanks
Die
Emulgierleitung
Das
Einspritzventil
Um
die Harnstoffwasserlösung
im Vorratstank
Die
noch vorhandenen Bauteile der Einrichtung sind beim Einfrieren der
Harnstoffwasserlösung nicht
gefährdet,
da ausreichend Ausdehnungsräume in
geringem Abstand zu diesen Bauteilen in Form der elastischen Schlauchleitungen
und des Vorratstankes
Das
Filter
Bei
der Einrichtung entfällt
komplett der Dosierblock, der bei der bekannten Einrichtung gemäß
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003119841 DE10319841A1 (en) | 2003-05-03 | 2003-05-03 | Device for treating diesel engine exhaust gases comprises storage tank for urea-water solution, and air line which opens into tank |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003119841 DE10319841A1 (en) | 2003-05-03 | 2003-05-03 | Device for treating diesel engine exhaust gases comprises storage tank for urea-water solution, and air line which opens into tank |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10319841A1 true DE10319841A1 (en) | 2004-12-02 |
Family
ID=33394089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003119841 Ceased DE10319841A1 (en) | 2003-05-03 | 2003-05-03 | Device for treating diesel engine exhaust gases comprises storage tank for urea-water solution, and air line which opens into tank |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10319841A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008006814A1 (en) * | 2006-07-12 | 2008-01-17 | Inergy Automotive Systems Research (Société Anonyme) | Ammonia precursor storage system |
FR2909901A1 (en) * | 2006-12-14 | 2008-06-20 | Inergy Automotive Systems Res | Metering of aqueous ammonia precursor solution into exhaust gases of internal combustion engine involves determining total amount of ammonia in solution, and calculating volume of solution to-be-injected for determined amount |
EP2199557A1 (en) * | 2008-12-17 | 2010-06-23 | Continental Automotive GmbH | Removal device of an aqueous urine solution in a motor vehicle |
WO2011088926A1 (en) * | 2010-01-22 | 2011-07-28 | Bayerische Motoren Werke Aktiengesellschaft | Motor vehicle with a storage container for reducing agent |
DE102007049892B4 (en) | 2007-10-18 | 2019-12-05 | Wabco Gmbh | Automotive emission control system and method for operating a motor vehicle emission control system |
-
2003
- 2003-05-03 DE DE2003119841 patent/DE10319841A1/en not_active Ceased
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008006814A1 (en) * | 2006-07-12 | 2008-01-17 | Inergy Automotive Systems Research (Société Anonyme) | Ammonia precursor storage system |
FR2903677A1 (en) * | 2006-07-12 | 2008-01-18 | Inergy Automotive Systems Res | STORAGE SYSTEM FOR AMMONIA PRECURSOR |
FR2909901A1 (en) * | 2006-12-14 | 2008-06-20 | Inergy Automotive Systems Res | Metering of aqueous ammonia precursor solution into exhaust gases of internal combustion engine involves determining total amount of ammonia in solution, and calculating volume of solution to-be-injected for determined amount |
DE102007049892B4 (en) | 2007-10-18 | 2019-12-05 | Wabco Gmbh | Automotive emission control system and method for operating a motor vehicle emission control system |
EP2199557A1 (en) * | 2008-12-17 | 2010-06-23 | Continental Automotive GmbH | Removal device of an aqueous urine solution in a motor vehicle |
WO2011088926A1 (en) * | 2010-01-22 | 2011-07-28 | Bayerische Motoren Werke Aktiengesellschaft | Motor vehicle with a storage container for reducing agent |
US9032716B2 (en) | 2010-01-22 | 2015-05-19 | Bayerische Motoren Werke Aktiengesellschaft | Motor vehicle having a storage tank for a reducing agent |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: HYDRAULIK-RING GMBH, 97828 MARKTHEIDENFELD, DE |
|
8131 | Rejection |