DE19514986A1 - Catalyser converting harmful exhaust components - Google Patents
Catalyser converting harmful exhaust componentsInfo
- Publication number
- DE19514986A1 DE19514986A1 DE19514986A DE19514986A DE19514986A1 DE 19514986 A1 DE19514986 A1 DE 19514986A1 DE 19514986 A DE19514986 A DE 19514986A DE 19514986 A DE19514986 A DE 19514986A DE 19514986 A1 DE19514986 A1 DE 19514986A1
- Authority
- DE
- Germany
- Prior art keywords
- cross
- insert
- closed
- flow
- catalyst according
- 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- Withdrawn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
- F01N3/24—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
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
-
- 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
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2825—Ceramics
- F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
-
- 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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/06—Ceramic, e.g. monoliths
Abstract
Description
Die Erfindung betrifft einen Katalysator zur Konvertierung schädlicher Ab gasbestandteile von Brennkraftmaschinen, insbesonder in Kraftfahrzeugen, gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a catalyst for converting harmful Ab gas components of internal combustion engines, especially in motor vehicles, according to the preamble of claim 1.
Bei Katalysatoren, insbesondere in Kraftfahrzeugen, ist es aus baulichen Gründen zumeist nicht möglich, Einström- und Abström-Abschnitte des Kata lysatorgehäuses so zu gestalten, daß eine gleichmäßige Durchströmung der katalytisch wirksamen Zellen des Katalysatoreinsatzes erreicht ist. Es gibt deshalb zahlreiche Vorschläge, durch strömungsverteilende Mittel wie Leit bleche, verstellbare Klappen etc., die Durchströmung zu verbessern, jedoch sind solche Mittel aufgrund der rauhen Betriebsbedingungen problematisch.In the case of catalytic converters, particularly in motor vehicles, it is of structural nature Mostly not possible for reasons, inflow and outflow sections of the Kata lysatorgehäuses so that a uniform flow through the catalytically active cells of the catalyst insert is reached. There are therefore numerous proposals, through flow-distributing means such as Leit sheet metal, adjustable flaps etc. to improve the flow, however such means are problematic due to the harsh operating conditions.
Aufgabe der Erfindung ist es, bei den gattungsgemäßen Katalysatoren mit einfachen Mitteln eine weitgehend gleichmäßige Durchströmung sicherzu stellen.The object of the invention is in the generic catalysts with simple means to ensure a largely uniform flow put.
Diese Aufgabe wird erfindungsgemäß mit den kennzeichnenden Merkmalen des Patentanspruches 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den weiteren Patentansprüchen angeführt.This object is achieved with the characterizing features of claim 1 solved. Advantageous developments of the invention are cited in the other claims.
Erfindungsgemäß wird vorgeschlagen, den aufgrund der Strömungsverhält nisse im Katalysator am stärksten durchströmten Querschnittsbereich des Katalysatoreinsatzes zumindest teilweise zu verschließen. Überraschend hat sich gezeigt, daß durch diese einfache Maßnahme in den übrigen Quer schnittsbereichen eine gleichmäßigere Durchströmung der katalytisch wirk samen Zellen erreicht wird, die insgesamt gesehen und wider Erwarten den Konvertierungsgrad des Katalysators über dessen Lebensdauer betrachtet erhöht.According to the invention it is proposed that due to the flow ratio cross-sectional area of the To at least partially close the catalyst insert. Surprisingly it has been shown that this simple measure in the remaining cross cut areas a more uniform flow of the catalytically active seed cells is reached, seen as a whole and contrary to expectations Degree of conversion of the catalyst considered over its life elevated.
Es wurde durch Strömungsanalysen erkannt, daß abhängig von den Ein ström- und Abströmverhältnissen am Katalysatoreinsatz, die durch bauliche und konstruktive Zwänge von Kraftfahrzeug zu Kraftfahrzeug verschieden sein können, die Durchströmung im Querschnitt gesehen sich in sehr stark durchströmte Bereiche, stark und weniger stark durchströmte Bereiche und kaum durchströmte Bereiche aufteilt. Die sehr stark durchströmten Bereiche sind Bereiche, die zwangsläufig relativ schnell altern und damit an Konver tierungsfähigkeit verlieren.It was recognized by flow analyzes that depending on the Ein flow and outflow conditions on the catalyst insert caused by structural and design constraints differ from motor vehicle to motor vehicle can be seen in cross-section in very strong flow areas flowed through, areas with strong and less flow and divides hardly flowed areas. The very heavily flowed areas are areas that inevitably age relatively quickly and thus converge lose ability to develop.
Verschließt man nun - entgegen der logisch scheinenden Annahme, diese sehr stark durchströmten Bereiche möglichst groß im Querschnitt auszubil den - diese Bereiche um einen gewissen Betrag, so steigt die Durchströ mung der anderen Bereich an, wobei bei richtiger Dimensionierung eine gleichmäßigere Durchströmung erzielt wird.Now one closes - contrary to the seemingly logical assumption areas with a high flow rate should be as large as possible in cross-section the - these areas by a certain amount, so the flow increases the other area, with a correct dimensioning more even flow is achieved.
Daraus resultiert, daß der Gesamtkonvertierungsgrad über der Laufzeit des Katalysators zunimmt und daß seine Betriebsbereitschaft aufgrund der gleichmäßigeren Durchströmung verlängert wird.As a result, the overall degree of conversion over the term of the Catalyst increases and that its operational readiness due to the more even flow is extended.
Das zumindest teilweise Verschließen des sehr stark durchströmten Quer schnittsbereiches ist problemlos, durch entsprechende Strömungsanalysen unterstützt, an die baulichen bzw. strömungstechnischen Gegebenheiten innerhalb des Katalysators anpaßbar, wobei z. B. die Querschnittsform des Katalysatoreinsatzes und die daran angepaßten Einström- und Abströmab schnitte rotationssymmetrisch, oval, polygonförmig, etc. sein können.The at least partial closure of the cross with a very high flow rate cut area is easy, by appropriate flow analysis supports the structural and fluidic conditions adaptable within the catalyst, z. B. the cross-sectional shape of the Catalyst insert and the adapted inflow and outflow downstream cuts can be rotationally symmetrical, oval, polygonal, etc.
Als bei in Kraftfahrzeugen verwendeten üblichen Katalysatoren vorteilhaft hat sich eine Dimensionierung des verschlossenen Querschnittsbereiches herausgestellt, die ca. 2/3 des sehr stark durchströmten Bereiches und ca. 10-20% des Gesamtquerschnittes des Katalysatoreinsatzes ausmacht. Dieser Querschnittsbereich kann bei der Herstellung des Katalysatoreinsat zes einseitig oder beiderseits bereits verschlossen werden, so daß die ent sprechenden Zellen des Katalysatoreinsatzes von der katalytisch wirksamen Beschichtung ausgenommen sind. Daraus resultiert eine nicht unbeträchtli che Kosteneinsparung bzw. Einsparung an Beschichtungsmaterial (Washcoat, Palladium, Platin, Rhodium, etc.).As advantageous in the case of conventional catalysts used in motor vehicles has a dimensioning of the closed cross-sectional area highlighted the approx. 2/3 of the very strongly flowed area and approx. Accounts for 10-20% of the total cross section of the catalyst insert. This cross-sectional area can be used in the manufacture of the catalyst insert zes are already closed on one or both sides, so that the ent speaking cells of the catalyst insert from the catalytically active Coating are excluded. This results in a not inconsiderable che cost savings or savings in coating material (Washcoat, palladium, platinum, rhodium, etc.).
Das Verschließen der angesprochenen Querschnittsbereiche kann bei Kata lysatoren mit metallischen Einsätzen durch Aufschweißen oder Auflöten ei nes Bleches oder einer Folie oder durch Aufbringen eines aushärtbaren Kittes oder Keramikmaterials an den stirnseitigen Enden der Einsätze erfol gen. Das Verschließen der Querschnittsbereiche kann wie bereits angeführt durch Einbeziehung in den Fertigungsprozeß des Katalysatoreinsatzes oder nach dessen Herstellung, bevorzugt jedoch vor dessen Beschichtung, durchgeführt werden.At Kata analyzers with metallic inserts by welding or soldering sheet or a foil or by applying a curable Putty or ceramic material at the front ends of the inserts The closing of the cross-sectional areas can, as already mentioned by inclusion in the manufacturing process of the catalyst insert or after its manufacture, but preferably before its coating, be performed.
Ein Ausführungsbeispiel der Erfindung ist im folgenden mit weiteren Einzel heit näher erläutert. Die schematische Zeichnung zeigt inAn embodiment of the invention is in the following with further details explained in more detail. The schematic drawing shows in
Fig. 1 in raumbildlicher Darstellung einen zylindrischen Katalysatoreinsatz mit an dessen Stirnseiten verschlossenen Querschnittsbereichen, Fig. 1 in three-dimensional view a cylindrical catalyst use with closed at the end faces of cross-sectional areas,
Fig. 2 einen Längsmittelschnitt durch einen Katalysator für Kraftfahrzeuge mit dem in Fig. 1 dargestellten Einsatz; und FIG. 2 shows a longitudinal central section through a catalytic converter for motor vehicles with the insert shown in FIG. 1; and
Fig. 3 einen Querschnitt gemäß Linie III-III der Fig. 2 durch den Katalysator. Fig. 3 shows a cross section along line III-III of Fig. 2 through the catalyst.
Der in der Fig. 1 dargestellte zylindrische Katalysator-Einsatz 10 besteht aus einem Keramik-Wabenkörper üblicher Bauart mit einer Vielzahl von die bei den Stirnseiten 12, 14 verbindenden, katalytisch wirksam u. a. mit Palladium, Platin und Rhodium beschichteten Zellen 16.The cylindrical catalyst insert 10 shown in FIG. 1 consists of a ceramic honeycomb body of conventional design with a multiplicity of cells 16 which connect the end faces 12 , 14 and are catalytically active, inter alia, coated with palladium, platinum and rhodium.
Der Einsatz 10 ist gemäß Fig. 2 in einem metallischen Gehäuse 18 gehal ten, wobei das Gehäuse 18 im wesentlichen einen den Einsatz 10 umschlie ßenden Mantel 20, einen sich in Abgasströmungsrichtung (Pfeil) konisch erweiternden Einströmabschnitt 22 und einen sich konisch verjüngenden Abströmabschnitt 24 aufweist. An die Abschnitte 22, 24 schließt jeweils ein Abgasrohr 26, 28 der nicht weiter dargestellten Abgasanlage der Brenn kraftmaschine in dem Kraftfahrzeug an.The insert 10 is shown in FIG. 2 in a metallic housing 18 , the housing 18 essentially having an insert 10 enclosing the jacket 20 , an inflow section 22 which widens conically in the exhaust gas flow direction (arrow) and a conically tapered outflow section 24 . At the sections 22 , 24 each have an exhaust pipe 26 , 28 of the exhaust system of the internal combustion engine, not shown, in the motor vehicle.
Es hat sich durch Strömungsanalysen herausgestellt, daß aufgrund der gegebenen baulichen Verhältnisse der Einsatz 10 (vgl. Fig. 3) einen sehr stark durchströmten, im wesentlichen zentrischen Bereich 30 (umgrenzt durch die ausgezogene Linie) aufweist, um den herum jeweils radial weiter außen liegend ein stark durchströmter, weniger stark durchströmter und schließlich kaum durchströmter Querschnittsbereich liegt (nicht dargestellt).It has been shown by flow analyzes that the insert 10 (see FIG. 3) has a very strongly flowed through, essentially central area 30 (delimited by the solid line) due to the given structural conditions, around which lies radially further outwards there is a cross-sectional area with a strong flow, less flow and finally hardly any flow (not shown).
Durch Verschließen ca. 2/3 des stark durchströmten Querschnittsbereiches 30 bzw. ca. 10% des Gesamtquerschnittes mit einem aushärtbaren Kera mikkitt 32 (schwarz gezeichnet) an beiden Stirnseiten 12, 14 des Einsatzes 10 wurde eine gleichmäßigere, verbesserte Gesamtdurchströmung des Einsatzes 10 erreicht und insbesondere also die radial äußere Durchströ mung wesentlich verbessert.By closing approx. 2/3 of the heavily flowed cross-sectional area 30 or approx. 10% of the total cross section with a hardenable ceramic putty 32 (shown in black) on both end faces 12, 14 of the insert 10 , a more uniform, improved overall flow of the insert 10 was achieved and in particular, the radially outer flow is significantly improved.
Das Verschließen der entsprechenden Querschnittsbereiche erfolgt vor dem Beschichten des Einsatzes 10 mit dem katalytisch wirksamen Material, so daß die durch den Keramikkitt verschlossenen Zellen 16a - die ja nicht durchströmt werden - unbeschichtet sind. Dementsprechend können ca. 10% des teuren Beschichtungsmateriales und der Edelmetalle eingespart werden.The corresponding cross-sectional areas are closed before the insert 10 is coated with the catalytically active material, so that the cells 16 a which are closed by the ceramic cement and which are not flowed through are uncoated. Accordingly, about 10% of the expensive coating material and the precious metals can be saved.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19514986A DE19514986A1 (en) | 1995-04-24 | 1995-04-24 | Catalyser converting harmful exhaust components |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19514986A DE19514986A1 (en) | 1995-04-24 | 1995-04-24 | Catalyser converting harmful exhaust components |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19514986A1 true DE19514986A1 (en) | 1996-10-31 |
Family
ID=7760208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19514986A Withdrawn DE19514986A1 (en) | 1995-04-24 | 1995-04-24 | Catalyser converting harmful exhaust components |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19514986A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1039996A1 (en) * | 1997-12-19 | 2000-10-04 | Corning Incorporated | Manufacture of cellular honeycomb structures |
WO2009073097A2 (en) * | 2007-11-30 | 2009-06-11 | Corning Incorporated | Method of manufacturing a ceramic honeycomb structure |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0245737A1 (en) * | 1986-05-12 | 1987-11-19 | INTERATOM Gesellschaft mit beschränkter Haftung | Honeycomb body, particularly a catalyst carrier, provided with opposedly folded metal sheet layers, and its manufacturing process |
DE8816500U1 (en) * | 1988-06-21 | 1989-09-28 | Fa. Andreas Stihl, 7050 Waiblingen, De | |
DE4025434A1 (en) * | 1990-08-10 | 1992-02-13 | Emitec Emissionstechnologie | HONEYCOMB BODY WITH CROSS-SECTIONAL AREAS OF DIFFERENT CHANNEL SIZES, IN PARTICULAR CATALYST SUPPORT BODY |
DE4222162A1 (en) * | 1991-07-06 | 1993-01-14 | Klaus Juergen Nord | Method for rapid ignition of IC engine exhaust pollutants - involves use of catalytically effective reactor whose through flow cross-section can be varied. |
EP0553942A1 (en) * | 1992-01-27 | 1993-08-04 | W.R. Grace & Co.-Conn. | Core for a catalytic converter |
-
1995
- 1995-04-24 DE DE19514986A patent/DE19514986A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0245737A1 (en) * | 1986-05-12 | 1987-11-19 | INTERATOM Gesellschaft mit beschränkter Haftung | Honeycomb body, particularly a catalyst carrier, provided with opposedly folded metal sheet layers, and its manufacturing process |
DE8816500U1 (en) * | 1988-06-21 | 1989-09-28 | Fa. Andreas Stihl, 7050 Waiblingen, De | |
DE4025434A1 (en) * | 1990-08-10 | 1992-02-13 | Emitec Emissionstechnologie | HONEYCOMB BODY WITH CROSS-SECTIONAL AREAS OF DIFFERENT CHANNEL SIZES, IN PARTICULAR CATALYST SUPPORT BODY |
DE4222162A1 (en) * | 1991-07-06 | 1993-01-14 | Klaus Juergen Nord | Method for rapid ignition of IC engine exhaust pollutants - involves use of catalytically effective reactor whose through flow cross-section can be varied. |
EP0553942A1 (en) * | 1992-01-27 | 1993-08-04 | W.R. Grace & Co.-Conn. | Core for a catalytic converter |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1039996A1 (en) * | 1997-12-19 | 2000-10-04 | Corning Incorporated | Manufacture of cellular honeycomb structures |
EP1039996A4 (en) * | 1997-12-19 | 2004-09-01 | Corning Inc | Manufacture of cellular honeycomb structures |
WO2009073097A2 (en) * | 2007-11-30 | 2009-06-11 | Corning Incorporated | Method of manufacturing a ceramic honeycomb structure |
WO2009073097A3 (en) * | 2007-11-30 | 2009-09-03 | Corning Incorporated | Method of manufacturing a ceramic honeycomb structure |
US7976769B2 (en) | 2007-11-30 | 2011-07-12 | Corning Incorporated | Method of manufacturing a ceramic honeycomb structure |
CN101878098B (en) * | 2007-11-30 | 2012-09-05 | 康宁股份有限公司 | Method of manufacturing a ceramic honeycomb structure |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1747356B1 (en) | Catalyst carrier body for a catalytic converter to be used close to the motor | |
WO2004063540A1 (en) | Space-saving unit for post-treating exhaust gases provided with round-tripping imbricated flow areas having a gas input and output on the same side | |
EP1179125B1 (en) | Method for reducing harmful components in the exhaust gas of an internal combustion engine, especially a diesel-internal combustion engine | |
DE10254764A1 (en) | exhaust system | |
EP2161423A1 (en) | Exhaust gas facility for diesel vehicles with an SCR catalytic converter | |
DE102007019912A1 (en) | Arrangement of component at lower side of passenger car, has installation space provided at lower side passenger car in rear corner area, which is engaged by component | |
DE102013109675A1 (en) | Emission control system of a vehicle | |
EP2273079B1 (en) | Exhaust gas aftertreatment device | |
DE10035544B4 (en) | Filter arrangement for an emission control system | |
EP1882090B1 (en) | Exhaust system with two exhaust treatment units | |
DE19514986A1 (en) | Catalyser converting harmful exhaust components | |
DE102018122637A1 (en) | Silencer for an exhaust system of a motor vehicle and motor vehicle with a silencer | |
DE202015106054U1 (en) | Exhaust gas aftertreatment device and its arrangement in a motor vehicle | |
DE102012209852A1 (en) | Exhaust gas purification system for arrangement in exhaust section of exhaust gas system of diesel internal combustion engine in motor vehicle, has input-oxidation catalyzer for oxidation of hydrocarbons and carbon monoxide | |
WO2008113561A1 (en) | Catalyst for an exhaust gas aftertreatment system for internal combustion engines | |
EP1688597A2 (en) | Exhaust gas cleaning device | |
WO2000012880A1 (en) | Device for stabilising the flow in the exhaust line of an internal combustion engine | |
DE2746475A1 (en) | Holder for catalytic exhaust gas purifier housing - has clamping band providing secure support even at high temperatures | |
EP3273026A1 (en) | Exhaust aftertreatment system for a combustion engine | |
DE102019130757A1 (en) | Exhaust system for an internal combustion engine | |
DE4210784A1 (en) | Metal honeycomb structure with regions with different flow conditions - built-up of smooth and wavy sheet forming alternating layers | |
DE102010053603A1 (en) | Catalyzer e.g. particulate filter, for cleaning exhaust gas in self-ignition engine, has carrier structure with total passage area that is divided into partial cross sections, where one of sections is radially enclosed by other section | |
DE102007036254A1 (en) | Exhaust system of an internal combustion engine | |
DE10036401A1 (en) | Reduction of noxious components in internal combustion engine exhaust, in particular from a diesel engine, using catalytic converters for oxidation and production of nitrogen dioxide and a particle filter | |
DE2540882A1 (en) | Catalytic exhaust decontamination lining for vehicles - has catalytic adsorber for noxious fumes in alumina and platinum matrix |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8139 | Disposal/non-payment of the annual fee |