DE4323791A1 - Exhaust aftertreatment device for the catalytic purification of the exhaust gases of internal combustion engines - Google Patents
Exhaust aftertreatment device for the catalytic purification of the exhaust gases of internal combustion enginesInfo
- Publication number
- DE4323791A1 DE4323791A1 DE19934323791 DE4323791A DE4323791A1 DE 4323791 A1 DE4323791 A1 DE 4323791A1 DE 19934323791 DE19934323791 DE 19934323791 DE 4323791 A DE4323791 A DE 4323791A DE 4323791 A1 DE4323791 A1 DE 4323791A1
- Authority
- DE
- Germany
- Prior art keywords
- intermediate ring
- monoliths
- aftertreatment device
- internal combustion
- exhaust
- 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.)
- Granted
Links
- 239000007789 gas Substances 0.000 title claims abstract description 11
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 5
- 238000000746 purification Methods 0.000 title abstract 2
- 239000003054 catalyst Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 239000000543 intermediate Substances 0.000 description 16
- 230000008961 swelling Effects 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- F01N3/2857—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 at least partially made of intumescent material, e.g. unexpanded vermiculite
-
- 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
- F01N13/009—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 two or more separate purifying devices arranged in series
- F01N13/0097—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 two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
-
- 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
- F01N3/2864—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 comprising two or more insulation layers
-
- 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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/06—Ceramic, e.g. monoliths
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)
Abstract
Description
Die Erfindung betrifft eine Abgasnachbehandlungseinrichtung zum katalytischen Reinigen der Abgase von Brennkraftmaschinen nach den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen.The invention relates to an exhaust gas aftertreatment device for catalytic cleaning of exhaust gases from internal combustion engines the features specified in the preamble of claim 1.
Aus der DE 39 29 205 C2 ist eine Abgasnachbehandlungseinrich tung bekannt, bei der eine Quellmatte zwischen benachbarten Monolithen und Katalysatorgehäuse gelagert ist. Die mit Abstand voneinander liegenden Monolithen sind zur Abschirmung der Quellmatte durch einen temperaturfesten Zwischenring über brückt, der die stirnseitigen Enden der benachbarten Monolithen klemmend umgreift.DE 39 29 205 C2 describes an exhaust gas aftertreatment device tion known in which a swelling mat between adjacent Monolith and catalyst housing is stored. By far monoliths lying apart from each other are used to shield the Swell mat through a temperature-resistant intermediate ring bridges the front ends of the neighboring monoliths gripping around.
Der Erfindung liegt die Aufgabe zugrunde, an einer Abgasnach behandlungseinrichtung neben fertigungs- und kostenaufwandarmen auch solche Maßnahmen vorzusehen, die trotz der auftretenden Relativbewegungen zwischen Monolithumfang und Zwischenring in folge ihrer unterschiedlichen Wärmeausdehnungskoeffizienten Beschädigungen an der Monolithoberfläche vermeiden helfen.The invention is based, to an exhaust gas after the task treatment facility in addition to low manufacturing and low costs also to provide for such measures, despite the occurring Relative movements between the monolith circumference and the intermediate ring in follow their different coefficients of thermal expansion Help prevent damage to the monolith surface.
Zur Lösung der Aufgabe dienen die im Kennzeichen des Patentan spruchs 1 angegebenen Merkmale.To solve the problem serve the in the characterizing part of the patent pronounced 1 specified characteristics.
Durch Einfügen des Zwischenringes zwischen die einzelnen Quellmattenlagen kann sich der Zwischenring bei Wärmedehnung innerhalb der Quellmatte frei entfalten, ohne daß es zu Beschädigungen an der Monolithaußenhaut kommt. Ferner wird vermieden, daß das definierte Spaltmaß zwischen dem Katalysa torgehäuse und den Monolithen sich vergrößert und die Quell matte verschiebt, wodurch eine Selbstzerstörung auftreten kann, da die Quellmatte nur Druck verträgt, jedoch keinen Verschiebeweg. Somit wird auch verhindert, daß die Einspann kraft des Zwischenringes verlorengeht, der gesamte Kraftverbund sich auflöst und der Katalysator durch Gaspulsationen zerstört wird.By inserting the intermediate ring between the individual The intermediate ring can swell when the thermal expansion occurs unfold freely within the swelling mat without it Damage to the monolith outer skin comes. Furthermore, avoided that the defined gap between the catalytic converter door housing and the monolith enlarged and the source matte moves, which can lead to self-destruction, since the swelling mat only tolerates pressure, but not any Displacement. This also prevents the clamping the entire power system is lost due to the intermediate ring dissolves and the catalyst is destroyed by gas pulsations becomes.
Die innere Lage der Quellmatte, die die Monolithen umspannt und eine Art Schutzfolie zwischen Monolithen und Zwischenring bil det, bewahrt die empfindliche Monolithoberfläche vor Schaden.The inner layer of the swelling mat, which spans the monoliths and a kind of protective film between monolith and intermediate ring bil det protects the sensitive monolith surface from damage.
Da Eingrabungen in die Monolithen vermieden werden, bleibt die Spannkraft der Quellmatte und damit die volle Funktion des ge samten Verbundes dauerhaft erhalten.Since digging into the monoliths is avoided, that remains Resilience of the swelling mat and thus the full function of the ge preserve the entire network permanently.
Eine Reduzierung des Fertigungs- und Kostenaufwandes ergibt sich dadurch, daß die Lagen der Quellmatte sowie der Zwischen ring baueinheitlich zusammengefaßt sind und als Ganzes auf einfache Weise um die Monolithen lagegerecht gewickelt werden können.A reduction in manufacturing and cost expenditure results the fact that the layers of the swelling mat and the intermediate ring are grouped together and as a whole easily wrapped around the monoliths in the correct position can.
Aus dem DE-GM 92 02 554 ist zwar eine Abgasnachbehandlungsein richtung mit einem eingebettetem Zwischenring bekannt, der je doch in der Aussparung einer in dem Einlaß- oder Auslaßrichter des Katalysators angeordneten Isolationsmatte einerseits und in einer Aussparung der einen Monolithen umgebenden Quellmatte andererseits eingesetzt ist. Zwischen diesen Komponenten und einer weiteren Komponente, nämlich einem den Spalt abgasseitig überdeckenden Keramikband, ist der Zwischenring eingebettet. Diese gebaute Ausführung ist fertigungs-, kosten- und montage aufwendiger. DE-GM 92 02 554 is an exhaust gas aftertreatment direction with an embedded intermediate ring known, each but in the recess one in the inlet or outlet judge the insulation mat arranged on the one hand and in a recess in the swelling mat surrounding a monolith on the other hand is used. Between these components and a further component, namely one on the flue gas side covering ceramic band, the intermediate ring is embedded. This built version is manufacturing, cost and assembly more complex.
In dem Unteranspruch ist noch eine förderliche Weiterbildung der Erfindung angegeben.In the subclaim is a further education specified the invention.
In der Zeichnung sind Ausführungsbeispiele der Erfindung dar gestellt und im folgenden näher erläutert. Es zeigen:In the drawing, embodiments of the invention are shown provided and explained in more detail below. Show it:
Fig. 1 die erfindungsgemäße Ausführung im Schnitt und Fig. 1 shows the embodiment of the invention in section and
Fig. 2 eine andere Ausführung. Fig. 2 shows another embodiment.
Eine Abgasnachbehandlungseinrichtung 1 für eine gemischver dichtende Brennkraftmaschine besteht aus einem als Außenschale dienenden Katalysatorgehäuse 2, in dem mit Abstand voneinander liegende wabenförmig strukturierte und zumeist keramische Mono lithen 3, 4 unter Zwischenlagerung einer zweilagig ausgebildeten Quellmatte 5 angeordnet sind.An exhaust gas aftertreatment device 1 for a mixture-sealing internal combustion engine consists of a catalyst housing 2 serving as an outer shell, in which honeycomb-structured and mostly ceramic monoliths 3, 4 spaced apart from one another are arranged with intermediate storage of a two-layer swelling mat 5 .
Der Zwischenraum 6 zwischen beiden Monolithen 3, 4 ist durch einen temperaturfesten Zwischenring 7 überbrückt, der zwischen die beiden Lagen 5a, 5b der Quellmatte 5 fest eingefügt ist. Der Zwischenring 7 kann als glatte Folie - wie dargestellt - oder als gewelltes Blech, versickt oder unversickt ausgeführt werden.The space 6 between the two monoliths 3, 4 is bridged by a temperature-resistant intermediate ring 7 , which is firmly inserted between the two layers 5 a, 5 b of the swelling mat 5 . The intermediate ring 7 can be designed as a smooth film - as shown - or as a corrugated sheet, embossed or unsinked.
Die innere Lage 5b der Quellmatte 5 ist im Bereich des Zwi schenraumes 6 ausgespart, so daß aufgrund der vorliegenden Durchbrechung 7 lediglich der Zwischenring 8 den hohen Abgas temperaturen ausgesetzt ist, welcher einen Schutz für die temperaturempfindliche Quellmatte 5 bietet.The inner layer 5 b of the source mat 5 is recessed in the area of inter mediate space 6 , so that due to the present opening 7, only the intermediate ring 8 is exposed to the high exhaust gas temperatures, which offers protection for the temperature-sensitive source mat 5 .
Der Zwischenring 8 ist gegenüber dem Zwischenraum 6 so breit ausgeführt, daß dessen Stirnseiten 8a, 8b weit in die Quell matte 5 zwischen der äußeren und inneren Lage 5a, 5b sitzfest hineinragen.The intermediate ring 8 is so wide with respect to the space 6 that its end faces 8 a, 8 b far into the source mat 5 between the outer and inner layer 5 a, 5 b protrude seated.
Die innere Lage 5b schließt mit ihren die Durchbrechung 8 be grenzenden Kanten mit den Stirnseiten 3a, 4a der benachbarten Monolithen 3, 4 gemäß Fig. 1 bündig ab. Diese Kanten können aber auch gegenüber den Stirnseiten 3a, 4a der Monolithen 3,4 leicht zurückgesetzt sein (Fig. 2).The inner layer 5 b is flush with the opening 8 be bordering edges with the end faces 3 a, 4 a of the adjacent monoliths 3, 4 as shown in FIG. 1. These edges can also against the end faces 3 a, 4 a of the monoliths 3.4 slightly recessed (FIG. 2).
Die zweilagige Quellmatte 5 mit integriertem Zwischenring 8 ist einfach herstellbar. Von dem aus Meterware bestehenden Lagen 5a, 5b wird aus der inneren Lage 5b ein die Durchbrechung 7 bildender Streifen herausgeschält, der Zwischenring 8 im Be reich der Durchbrechung 7 eingelegt und die Lagen dann mitein ander verklebt und als Verbund bzw. Baueinheit um die Mono lithen 3, 4 gewickelt, die Halbschalen des Katalysatorgehäuses auf die Quellmatte gepreßt und zu einer einteiligen Außenschale verschweißt.The two-layer swelling mat 5 with an integrated intermediate ring 8 is easy to manufacture. From the existing layers 5 a, 5 b, the opening 7 b is peeled out of the inner layer 5 b, the intermediate ring 8 is inserted in the area of the opening 7 and the layers are then glued together and as a composite or structural unit the Mono lithen 3, 4 wrapped, the half-shells of the catalyst housing pressed onto the swelling mat and welded to a one-piece outer shell.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19934323791 DE4323791C2 (en) | 1993-07-15 | 1993-07-15 | Exhaust aftertreatment device for the catalytic purification of the exhaust gases from internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19934323791 DE4323791C2 (en) | 1993-07-15 | 1993-07-15 | Exhaust aftertreatment device for the catalytic purification of the exhaust gases from internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE4323791A1 true DE4323791A1 (en) | 1995-01-19 |
| DE4323791C2 DE4323791C2 (en) | 1997-03-20 |
Family
ID=6492928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19934323791 Expired - Fee Related DE4323791C2 (en) | 1993-07-15 | 1993-07-15 | Exhaust aftertreatment device for the catalytic purification of the exhaust gases from internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE4323791C2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005098210A1 (en) * | 2004-04-06 | 2005-10-20 | Catalytic Support Systems Limited | A separator for a catalytic converter |
| US7501099B2 (en) | 1996-06-18 | 2009-03-10 | 3M Innovative Properties Company | Hybrid mounting system for pollution control devices |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3729994A1 (en) * | 1987-09-08 | 1989-03-16 | Bischoff Erhardt Gmbh Co Kg | Apparatus for the catalytic purification of exhaust gases |
| DE3929205A1 (en) * | 1989-09-02 | 1991-03-21 | Leistritz Ag | EXHAUST APPARATUS, IN PARTICULAR. EXHAUST GAS PURIFICATION DEVICE |
| DE9202554U1 (en) * | 1992-02-27 | 1992-04-16 | Heinrich Gillet GmbH & Co KG, 6732 Edenkoben | Device for catalytic cleaning of exhaust gases from internal combustion engines |
-
1993
- 1993-07-15 DE DE19934323791 patent/DE4323791C2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3729994A1 (en) * | 1987-09-08 | 1989-03-16 | Bischoff Erhardt Gmbh Co Kg | Apparatus for the catalytic purification of exhaust gases |
| DE3929205A1 (en) * | 1989-09-02 | 1991-03-21 | Leistritz Ag | EXHAUST APPARATUS, IN PARTICULAR. EXHAUST GAS PURIFICATION DEVICE |
| DE9202554U1 (en) * | 1992-02-27 | 1992-04-16 | Heinrich Gillet GmbH & Co KG, 6732 Edenkoben | Device for catalytic cleaning of exhaust gases from internal combustion engines |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7501099B2 (en) | 1996-06-18 | 2009-03-10 | 3M Innovative Properties Company | Hybrid mounting system for pollution control devices |
| WO2005098210A1 (en) * | 2004-04-06 | 2005-10-20 | Catalytic Support Systems Limited | A separator for a catalytic converter |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4323791C2 (en) | 1997-03-20 |
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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 |
|
| 8327 | Change in the person/name/address of the patent owner |
Owner name: DAIMLERCHRYSLER AG, 70327 STUTTGART, DE |
|
| 8327 | Change in the person/name/address of the patent owner |
Owner name: DAIMLER AG, 70327 STUTTGART, DE |
|
| 8339 | Ceased/non-payment of the annual fee |