DE4204195C2 - Exhaust aftertreatment device - Google Patents
Exhaust aftertreatment deviceInfo
- Publication number
- DE4204195C2 DE4204195C2 DE4204195A DE4204195A DE4204195C2 DE 4204195 C2 DE4204195 C2 DE 4204195C2 DE 4204195 A DE4204195 A DE 4204195A DE 4204195 A DE4204195 A DE 4204195A DE 4204195 C2 DE4204195 C2 DE 4204195C2
- Authority
- DE
- Germany
- Prior art keywords
- aftertreatment device
- exhaust aftertreatment
- turbulence generator
- exhaust
- housing part
- 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.)
- Expired - Fee Related
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
- F01N3/24—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
- F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
- F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/0211—Arrangements for mounting filtering elements in housing, e.g. with means for compensating thermal expansion or vibration
-
- 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
- F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
- F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
- F01N3/2867—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets being placed at the front or end face of catalyst body
-
- 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
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (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)
Description
Die Erfindung betrifft eine Abgasnachbehandlungsvorrichtung gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to an exhaust gas aftertreatment device according to the preamble of claim 1.
Aus der EP-0 410 924 A2 ist bereits eine Abgasnachbehandlungsvor richtung der gattungsgemäßen Art bekannt. In einem Gehäuse mit einem diffusorartig erweiterten Zuströmgehäuseteil ist ein Abgas nachbehandlungselement angeordnet, wobei das Zuströmgehäuseteil einen Einsatz mit Elementen zur Beeinflussung der Grenzschicht einer Abgasströmung umfaßt.EP-0 410 924 A2 already discloses an exhaust gas aftertreatment direction of the generic type known. In a case with A diffuser-like expanded inflow housing part is an exhaust gas arranged aftertreatment element, the inflow housing part use with elements to influence the boundary layer includes an exhaust gas flow.
Zum allgemeinen Hintergrund wird noch auf die Druckschrift DE-OS 24 92 002 verwiesen.The general background is still on the publication DE-OS 24 92 002.
Der Erfindung liegt die Aufgabe zugrunde, einen konischen Ver bindungsstutzen, insbesondere für große Öffnungswinkel, so auszu bilden, daß ein gleichmäßiges Strömungsprofil an der Stirnseite des Abgasnachbehandlungselements entsteht.The invention has for its object a conical Ver connection piece, especially for large opening angles, so out form that a uniform flow profile on the front of the exhaust gas aftertreatment element.
Die Aufgabe ist erfindungsgemäß durch die im Kennzeichen des Hauptanspruches gegebenen Merkmale gelöst. The object of the invention is characterized by the Main claim given characteristics solved.
Der Einsatz bildet Turbulenzerzeuger, deren Vorteil darin liegt, daß auf sehr einfache Art kleine Ablösewirbel stromauf wärts der Anströmseite des Abgasnachbehandlungselements erzeugt werden, durch die Energie aus der Mitte der Strömung an die Wand gebracht wird. Dadurch wird auf einfache Weise eine Strahlaufweitung mit einem gleichmäßigen Strömungsprofil am Ende des Zuströmgehäuseteils und folglich eine gleichmäßige Beaufschlagung der Anströmfläche des Abgasnachbehandlungsele ments erreicht. The use forms turbulence generators, their advantage in it lies in a very simple way upstream of small separation vortices generated upstream of the exhaust aftertreatment element through the energy from the middle of the flow to the Wall is brought. This is a simple Beam expansion with a uniform flow profile on End of the inflow housing part and consequently a uniform Actuation of the flow area of the exhaust gas aftertreatment element reached.
Weitere Ausgestaltungen und Vorteile der Erfindung gehen aus den Unteransprüchen und der Beschreibung hervor.Further configurations and advantages of the invention go out the subclaims and the description.
Ein Ausführungsbeispiel der Erfindung ist in den nachstehenden Zeichnungen näher dargestellt und wird im folgenden näher be schrieben. Es zeigen:An embodiment of the invention is in the following Drawings shown in more detail and will be closer in the following wrote. Show it:
Fig. 1 eine Abgasnachbehandlungsvorrichtung mit Turbu lenzerzeugern im Zuströmgehäuse in einem Längs schnitt und Fig. 1 shows an exhaust gas aftertreatment device with Turbu lenzgeneratoren in the inflow housing in a longitudinal section
Fig. 2 eine Teilansicht von Fig. 1 mit den erfindungs gemäßen Turbulenzerzeugern, die hier als Stege ausgeführt sind. Fig. 2 is a partial view of Fig. 1 with the inventive turbulence generators, which are designed here as webs.
In Fig. 1 ist eine Abgasnachbehandlungsvorrichtung, die Teil einer nicht gezeigten Abgasanlage ist, dargestellt. Die Abgas nachbehandlungsvorrichtung besteht aus einem Gehäuse 1, das zur Aufnahme mindestens eines Abgasnachbehandlungselementes 4, z. B. eines Rußfilters oder Katalysators, dient. Das Gehäuse 1 be steht aus einem als Diffusor ausgebildeten Zuströmgehäuseteil 2, einem Gehäuse-Mittelteil 3 zur Aufnahme des Abgasnachbe handlungselementes 4 und einem düsenförmigen Abströmgehäuse 5. Das Abgasnachbehandlungselement 4 ist über eine Isoliermatte 6 im Gehäuse-Mittelteil 3 gehalten.In Fig. 1 is an exhaust aftertreatment device that is part of an exhaust system, not shown, is illustrated. The exhaust gas aftertreatment device consists of a housing 1 , which for receiving at least one exhaust gas aftertreatment element 4 , for. B. a soot filter or catalyst. The housing 1 be consists of a diffuser designed as an inflow housing part 2 , a housing middle part 3 for receiving the exhaust gas treatment element 4 and a nozzle-shaped outflow housing 5 . The exhaust gas aftertreatment element 4 is held in the middle part 3 of the housing via an insulating mat 6 .
Das Zuströmgehäuseteil 2 besitzt eine Einströmöffnung 7 für die Abgase und eine Innenseite 8 zur Führung der Abgasströmung. Entlang der Innenseite 8 sind erfindungsgemäß Turbulenzerzeuger 9 angeordnet. Diese können in Form von ringförmigen Stegen 14 oder Stolperdrähten oder Stiften ausgebildet sein.The inflow housing part 2 has an inflow opening 7 for the exhaust gases and an inside 8 for guiding the exhaust gas flow. According to the invention, turbulence generators 9 are arranged along the inside 8 . These can be designed in the form of annular webs 14 or trip wires or pins.
In dem Zuströmgehäuseteil 2 befinden sich Löcher 12, in die Befestigungslaschen 13 der Turbulenzerzeuger 9 eingesteckt sind, über die die Turbulenzerzeuger 9 durch Schweißen, Löten oder Nieten mit dem Zuströmgehäuseteil 2 verbunden sind. Die Turbulenzerzeuger 9 sind im wesentlichen senkrecht stehend auf der Innenseite 8 des Diffusors angebracht.There are holes 12 in the inflow housing part 2 , into which fastening tabs 13 of the turbulence generator 9 are inserted, via which the turbulence generators 9 are connected to the inflow housing part 2 by welding, soldering or riveting. The turbulence generators 9 are mounted essentially vertically on the inside 8 of the diffuser.
Die Turbulenzerzeuger 9 können auch eine von 90° abweichende feste Winkellage bezüglich der Innenseite 8 aufweisen. In Ab hängigkeit von der Beaufschlagung durch die Strömung, können die Turbulenzerzeuger 9 auch federnd ausgebildet sein. Da das Zuströmgehäuseteil 2 starken Temperaturschwankungen ausgesetzt ist, sind die Turbulenzerzeuger 9 in der Ausführung als ringförmige Stege 14 mit jeweils von ihrer Innenkante aus gehenden radialen Schlitzen 11 versehen, die gleichmäßig auf ihrem Umfang verteilt angeordnet sind. Die Schlitze 11 verhin dern Deformationen, die durch Wärmespannungen entstehen können. Um eine optimale Ausnutzung der Verwirbelung zu erreichen, sind die Schlitze 11 der Stege 14 in Hauptströmungsrichtung 10 ver setzt zueinander angeordnet.The turbulence generators 9 can also have a fixed angular position with respect to the inside 8 that deviates from 90 °. In dependence on the exposure to the flow, the turbulence generator 9 can also be resilient. Since the inflow housing part 2 is exposed to strong temperature fluctuations, the turbulence generators 9 are designed as annular webs 14 , each with radial slots 11 extending from their inner edge, which are arranged evenly distributed over their circumference. The slots 11 prevent deformations that can arise from thermal stresses. In order to achieve optimal utilization of the swirling, the slots 11 of the webs 14 are arranged in the main flow direction 10 and are arranged relative to one another.
Die Turbulenzerzeuger 9 können auch als einteiliger, kegelför miger Einsatz gefertigt und anschließend durch Schweißen, Löten oder Nieten mit dem Zuströmgehäuseteil 2 verbunden werden. Dies bringt den Vorteil einer einfacheren Montage der Turbulenzer zeuger 9 in das Zuströmgehäuseteil 2.The turbulence generator 9 can also be manufactured as a one-piece, kegelför shaped insert and then connected to the inflow housing part 2 by welding, soldering or riveting. This has the advantage of simpler assembly of the turbulence generator 9 in the inflow housing part 2 .
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4204195A DE4204195C2 (en) | 1992-02-13 | 1992-02-13 | Exhaust aftertreatment device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4204195A DE4204195C2 (en) | 1992-02-13 | 1992-02-13 | Exhaust aftertreatment device |
Publications (2)
Publication Number | Publication Date |
---|---|
DE4204195A1 DE4204195A1 (en) | 1993-08-19 |
DE4204195C2 true DE4204195C2 (en) | 1994-03-03 |
Family
ID=6451560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4204195A Expired - Fee Related DE4204195C2 (en) | 1992-02-13 | 1992-02-13 | Exhaust aftertreatment device |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4204195C2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2429002A1 (en) * | 1974-06-15 | 1976-01-08 | Bosch Gmbh Robert | IC engine exhaust gas reactor - incorporates air conduit funnel in connection piece and reactor in tubular housing |
US5110560A (en) * | 1987-11-23 | 1992-05-05 | United Technologies Corporation | Convoluted diffuser |
-
1992
- 1992-02-13 DE DE4204195A patent/DE4204195C2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE4204195A1 (en) | 1993-08-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: DAIMLER-BENZ AKTIENGESELLSCHAFT, 70567 STUTTGART, |
|
8327 | Change in the person/name/address of the patent owner |
Owner name: DAIMLERCHRYSLER AG, 70567 STUTTGART, DE |
|
8339 | Ceased/non-payment of the annual fee |