DE102011013335A1 - Exhaust system of an internal combustion engine - Google Patents
Exhaust system of an internal combustion engine Download PDFInfo
- Publication number
- DE102011013335A1 DE102011013335A1 DE102011013335A DE102011013335A DE102011013335A1 DE 102011013335 A1 DE102011013335 A1 DE 102011013335A1 DE 102011013335 A DE102011013335 A DE 102011013335A DE 102011013335 A DE102011013335 A DE 102011013335A DE 102011013335 A1 DE102011013335 A1 DE 102011013335A1
- Authority
- DE
- Germany
- Prior art keywords
- exhaust
- exhaust gas
- exhaust system
- jacket body
- lateral surface
- 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- Withdrawn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
Images
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
- 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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
-
- 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
- F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
-
- 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
- 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
- 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
Eine Abgasanlage einer Brennkraftmaschine umfasst einen Abgasstrang zum Führen eines heißen Abgasstroms und eine Einspritzeinrichtung zum Einbringen eines Fluids in den Abgasstrom. Die Einspritzeinrichtung umfasst wenigstens eine in den Abgasstrang mündende Einspritzdüse. In dem Abgasstrang ist ein Mantelkörper angeordnet, dessen Mantelfläche einen Einspritzbereich der Einspritzdüse zumindest teilweise umgibt, wobei in der Mantelfläche mindestens eine Durchtrittsöffnung für das Abgas vorgesehen ist.An exhaust system of an internal combustion engine comprises an exhaust line for guiding a hot exhaust gas flow and an injection device for introducing a fluid into the exhaust gas flow. The injection device comprises at least one injection nozzle opening into the exhaust system. A casing body is arranged in the exhaust gas line, the casing surface of which at least partially surrounds an injection region of the injection nozzle, with at least one passage opening for the exhaust gas being provided in the casing surface.
Description
Die vorliegende Erfindung betrifft eine Abgasanlage einer Brennkraftmaschine mit einem Abgasstrang zum Führen eines heißen Abgasstroms und einer Einspritzeinrichtung zum Einbringen eines Fluids, insbesondere eines Wasser-Harnstoff-Gemisches oder eines Flüssigkraftstoffs, in den Abgasstrom, wobei die Einspritzeinrichtung wenigstens eine in den Abgasstrang mündende Einspritzdüse umfasst.The present invention relates to an exhaust system of an internal combustion engine having an exhaust line for guiding a hot exhaust stream and an injection device for introducing a fluid, in particular a water-urea mixture or a liquid fuel, in the exhaust gas stream, wherein the injection device comprises at least one opening into the exhaust line injection nozzle ,
Aufgrund strenger werdender Abgasvorschriften für Verbrennungsmotoren müssen Stickoxide (NOx) im Abgas reduziert werden. Eine bekannte Möglichkeit besteht darin, die Stickoxide in einer so genannten selektiven katalytischen Reduktion (SCR) zu Stickstoff und Wasser zu reduzieren. Dies erfolgt in einem so genannten SCR-Katalysator unter Verwendung eines in das Abgas eingespritzten Reduktionsmittels. Hierfür kann insbesondere ein Wasser-Harnstoff-Gemisch verwendet werden, dessen Harnstoff im Abgas zu Ammoniak zerfällt, das mit den Stickoxiden reagiert. Des Weiteren kann auch Flüssigkraftstoff in Form unterschiedlicher Kohlenwasserstoffverbindungen (HC) in das Abgas eingespritzt werden.Due to stricter exhaust gas regulations for internal combustion engines, nitrogen oxides (NOx) in the exhaust gas must be reduced. A known possibility is to reduce the nitrogen oxides in a so-called selective catalytic reduction (SCR) to nitrogen and water. This is done in a so-called SCR catalyst using a reducing agent injected into the exhaust gas. For this purpose, in particular a water-urea mixture can be used, the urea decomposes in the exhaust gas to ammonia, which reacts with the nitrogen oxides. Furthermore, liquid fuel in the form of different hydrocarbon compounds (HC) can also be injected into the exhaust gas.
Wünschenswert ist bei derartigen Reduktionsverfahren grundsätzlich, dass einerseits das Reduktionsmittel möglichst gleichmäßig mit dem Abgas vermischt wird und andererseits eine möglichst vollständige Verdampfung bzw. Thermolyse des flüssigen Reduktionsmittels erzielt wird, um einen hohen Wirkungsgrad bei der Reduktion sowie einen ablagerungsfreien Betrieb zu erreichen.It is desirable in such reduction methods in principle that on the one hand, the reducing agent is mixed as uniformly as possible with the exhaust gas and on the other hand the most complete evaporation or thermolysis of the liquid reducing agent is achieved in order to achieve high efficiency in the reduction and a deposit-free operation.
Eine Abgasanlage der genannten Art ist beispielsweise aus der
Die Lösung dieser Aufgabe erfolgt durch eine Abgasanlage mit den Merkmalen des Anspruchs 1.The solution of this object is achieved by an exhaust system with the features of
Erfindungsgemäß ist in dem Abgasstrang ein Mantelkörper angeordnet, dessen Mantelfläche einen Einspritzbereich der Einspritzdüse zumindest teilweise umgibt, wobei in der Mantelfläche mindestens eine Durchtrittsöffnung für das Abgas vorgesehen ist.According to the invention, a jacket body is arranged in the exhaust gas line, the jacket surface of which at least partially surrounds an injection region of the injection nozzle, wherein at least one passage opening for the exhaust gas is provided in the jacket surface.
Ein Kerngedanke der Erfindung besteht darin, den Einspritzbereich vor einer direkten Anströmung durch das Abgas zu schützen. Hierfür wird der Mantelkörper um den Einspritzbereich gelegt. Aufgrund der Durchtrittsöffnung kann ein Teil des Abgases in das Innere des Mantelkörpers gelangen, in das auch das Fluid, beispielsweise das Wasser-Harnstoff-Gemisch, eingespritzt wird. Dadurch durchmischt sich das Abgas mit dem eingespritzten Fluid, ohne dass das Fluid durch den Abgasdruck an eine Rohrwand der Abgasanlage gedrückt wird.A core idea of the invention is to protect the injection region from direct flow through the exhaust gas. For this purpose, the jacket body is placed around the injection area. Due to the passage opening, part of the exhaust gas can reach the interior of the jacket body, into which the fluid, for example the water-urea mixture, is injected. As a result, the exhaust gas mixes with the injected fluid, without the fluid being pressed by the exhaust gas pressure to a pipe wall of the exhaust system.
Der Mantelkörper kann direkt an die Einspritzvorrichtung anschließen, so dass Abgas nur über die Mantelfläche in das Innere des Mantelkörpers gelangen kann. Er kann aber auch einen Abstand zur Einspritzeinrichtung aufweisen, so dass Abgas grundsätzlich auch von der Eintrittsseite her in den Mantelkörper gelangen kann.The jacket body can connect directly to the injector, so that exhaust gas can only reach the inside of the jacket body via the jacket surface. But it can also have a distance from the injection device, so that exhaust gas can in principle also pass from the inlet side into the jacket body.
Die Einspritzung erfolgt bevorzugt wandnah, insbesondere im Bereich einer Abwinkelung eines Abgasrohres der Abgasanlage. Die Einspritzung kann aber auch an anderer Stelle und auch axial erfolgen.The injection is preferably close to the wall, in particular in the region of a bend of an exhaust pipe of the exhaust system. The injection can also be done elsewhere and also axially.
Als Durchtrittsöffnungen der Mantelfläche des Mantelkörpers kommen Schlitze und Lochungen in Betracht. Auch Langlöcher oder sonstige Durchtrittsöffnungen können vorgesehen werden.As through openings of the lateral surface of the jacket body slots and perforations come into consideration. Even slots or other openings can be provided.
Als Mantelkörper kann insbesondere ein Konus vorgesehen sein, der sich ausgehend von der Einspritzeinrichtung erweitert. Je nach Anwendung kannte auch ein Zylinder als Mantelkörper vorgesehen sein.In particular, a cone may be provided as the jacket body, which expands starting from the injection device. Depending on the application knew a cylinder may be provided as a jacket body.
Weiterbildungen der Erfindung sind auch in den abhängigen Ansprüchen, der Beschreibung sowie den beigefügten Zeichnungen angegeben.Further developments of the invention are set forth in the dependent claims, the description and the accompanying drawings.
Die Erfindung wird nachfolgend beispielhaft unter Bezugnahme auf die Zeichnungen beschrieben.The invention will now be described by way of example with reference to the drawings.
In den
Bei der in
Bei der in
Bei der in
Durch die erfindungsgemäße Abgasanlage werden Totwassergebiete im Bereich der Einspritzung vermieden. Die Tröpfchenbildung erfolgt innerhalb des Konus
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Abschnitt der AbgasanlageSection of the exhaust system
- 22
- EinspritzeinrichtungInjector
- 33
- Rohrstückpipe section
- 44
- Eckbereichcorner
- 55
- Konuscone
- 66
- Drallturbineswirl turbine
- 77
- Längsschlitzlongitudinal slot
- 88th
- Lochungperforation
- 99
- Lochhole
- 1010
- Ausstülpungprotuberance
- 1111
- Eintrittsöffnunginlet opening
- 1212
- Schlitzslot
- II
- EinspritzrichtungInjection direction
- IIII
- AbgasstromrichtungExhaust gas flow direction
- IIIIII
- Konusachsecone axis
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 102008059602 A1 [0004] DE 102008059602 A1 [0004]
Claims (10)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011013335A DE102011013335A1 (en) | 2011-03-08 | 2011-03-08 | Exhaust system of an internal combustion engine |
PCT/EP2012/053790 WO2012120000A1 (en) | 2011-03-08 | 2012-03-06 | Exhaust system of an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011013335A DE102011013335A1 (en) | 2011-03-08 | 2011-03-08 | Exhaust system of an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102011013335A1 true DE102011013335A1 (en) | 2012-09-13 |
Family
ID=45819203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102011013335A Withdrawn DE102011013335A1 (en) | 2011-03-08 | 2011-03-08 | Exhaust system of an internal combustion engine |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102011013335A1 (en) |
WO (1) | WO2012120000A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106121792A (en) * | 2016-08-26 | 2016-11-16 | 广西玉柴机器股份有限公司 | A kind of new urea blender |
WO2017180038A1 (en) * | 2016-04-11 | 2017-10-19 | Scania Cv Ab | An injection arrangement for injection of a urea solution into an exhaust gas passage |
EP3517203A1 (en) * | 2018-01-26 | 2019-07-31 | Donaldson Company, Inc. | Mixing device for mixing a spray from an injector into a gas and system comprising same |
EP3508705A4 (en) * | 2016-08-30 | 2020-02-12 | Weichai Power Co., Ltd. | Generator and double-swirl mixing device thereof |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202008001547U1 (en) | 2007-07-24 | 2008-04-10 | Emcon Technologies Germany (Augsburg) Gmbh | Assembly for introducing a reducing agent into the exhaust pipe of an exhaust system of an internal combustion engine |
CN104066943B (en) | 2013-01-17 | 2016-08-24 | 株式会社小松制作所 | Reducing agent aqueous solution mixing arrangement and possess its exhaust aftertreatment device |
US8893481B2 (en) | 2013-01-17 | 2014-11-25 | Komatsu Ltd. | Reductant aqueous solution mixing device and exhaust aftertreatment device provided with the same |
KR20140102122A (en) | 2013-01-17 | 2014-08-21 | 가부시키가이샤 고마쓰 세이사쿠쇼 | Reductant aqueous solution mixing device and exhaust aftertreatment device provided with the same |
KR101360161B1 (en) | 2013-01-17 | 2014-02-12 | 가부시키가이샤 고마쓰 세이사쿠쇼 | Reductant aqueous solution mixing device and exhaust aftertreatment device provided with the same |
EP3152419B1 (en) | 2014-06-03 | 2020-03-04 | Faurecia Emissions Control Technologies, USA, LLC | Doser cone assembly |
WO2016176078A1 (en) | 2015-04-30 | 2016-11-03 | Faurecia Emissions Control Technologies, Usa, Llc | Mixer with integrated doser cone |
US9828897B2 (en) | 2015-04-30 | 2017-11-28 | Faurecia Emissions Control Technologies Usa, Llc | Mixer for a vehicle exhaust system |
WO2016176076A1 (en) | 2015-04-30 | 2016-11-03 | Faurecia Emissions Control Technologies, Usa, Llc | Full rotation mixer |
US9719397B2 (en) | 2015-04-30 | 2017-08-01 | Faurecia Emissions Control Technologies Usa, Llc | Mixer with integrated doser cone |
WO2018075061A1 (en) | 2016-10-21 | 2018-04-26 | Faurecia Emissions Control Technologies Usa, Llc | Reducing agent mixer |
US10787946B2 (en) | 2018-09-19 | 2020-09-29 | Faurecia Emissions Control Technologies, Usa, Llc | Heated dosing mixer |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008059602A1 (en) | 2008-11-28 | 2010-06-02 | Bayerische Motoren Werke Aktiengesellschaft | Device for mixing reducing agent in exhaust gas stream of internal combustion engine, has exhaust line and dosing unit with opening for supplying reducing agent in exhaust line |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7581387B2 (en) * | 2005-02-28 | 2009-09-01 | Caterpillar Inc. | Exhaust gas mixing system |
US20060218902A1 (en) * | 2005-03-31 | 2006-10-05 | Solar Turbines Incorporated | Burner assembly for particulate trap regeneration |
US8033104B2 (en) * | 2008-07-09 | 2011-10-11 | Ford Global Technologies, Llc | Selective catalytic reduction (SCR) catalyst injection systems |
JP2011064069A (en) * | 2009-09-15 | 2011-03-31 | Toyota Industries Corp | Exhaust gas treatment system |
US8240137B2 (en) * | 2009-10-27 | 2012-08-14 | Cummins Filtration Ip, Inc. | Reductant injection and decomposition system |
-
2011
- 2011-03-08 DE DE102011013335A patent/DE102011013335A1/en not_active Withdrawn
-
2012
- 2012-03-06 WO PCT/EP2012/053790 patent/WO2012120000A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008059602A1 (en) | 2008-11-28 | 2010-06-02 | Bayerische Motoren Werke Aktiengesellschaft | Device for mixing reducing agent in exhaust gas stream of internal combustion engine, has exhaust line and dosing unit with opening for supplying reducing agent in exhaust line |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017180038A1 (en) * | 2016-04-11 | 2017-10-19 | Scania Cv Ab | An injection arrangement for injection of a urea solution into an exhaust gas passage |
CN106121792A (en) * | 2016-08-26 | 2016-11-16 | 广西玉柴机器股份有限公司 | A kind of new urea blender |
CN106121792B (en) * | 2016-08-26 | 2018-01-16 | 广西玉柴机器股份有限公司 | A kind of urea blender |
EP3508705A4 (en) * | 2016-08-30 | 2020-02-12 | Weichai Power Co., Ltd. | Generator and double-swirl mixing device thereof |
US11365666B2 (en) | 2016-08-30 | 2022-06-21 | Weichai Power Co., Ltd. | Generator and double-swirl mixing device thereof |
EP3517203A1 (en) * | 2018-01-26 | 2019-07-31 | Donaldson Company, Inc. | Mixing device for mixing a spray from an injector into a gas and system comprising same |
WO2019147989A1 (en) * | 2018-01-26 | 2019-08-01 | Donaldson Company, Inc. | Mixing device for mixing a spray from an injector into a gas and system comprising same |
US11465105B2 (en) | 2018-01-26 | 2022-10-11 | Donaldson Company, Inc. | Mixing device for mixing a spray from an injector into a gas and system comprising same |
Also Published As
Publication number | Publication date |
---|---|
WO2012120000A1 (en) | 2012-09-13 |
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R163 | Identified publications notified |
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