DE4033621C1 - Filter for cleansing exhaust gas, esp. from diesel engine - has filter body with longitudinal channels which are sepd. by porous sepg. walls which are not penetrated by soot particles - Google Patents

Filter for cleansing exhaust gas, esp. from diesel engine - has filter body with longitudinal channels which are sepd. by porous sepg. walls which are not penetrated by soot particles

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Publication number
DE4033621C1
DE4033621C1 DE4033621A DE4033621A DE4033621C1 DE 4033621 C1 DE4033621 C1 DE 4033621C1 DE 4033621 A DE4033621 A DE 4033621A DE 4033621 A DE4033621 A DE 4033621A DE 4033621 C1 DE4033621 C1 DE 4033621C1
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DE
Germany
Prior art keywords
filter
channels
exhaust gas
porous
walls
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
Application number
DE4033621A
Other languages
German (de)
Inventor
Hans-J. Dipl.-Ing. 7148 Remseck De Langer
Rolf 7050 Waiblingen De Gabler
Bernhard 7303 Neuhausen De Jokl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler Benz AG
Original Assignee
Mercedes Benz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mercedes Benz AG filed Critical Mercedes Benz AG
Priority to DE4033621A priority Critical patent/DE4033621C1/en
Application granted granted Critical
Publication of DE4033621C1 publication Critical patent/DE4033621C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • 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
    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
    • 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
    • F01N3/022—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, 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
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • 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
    • F01N2330/14—Sintered material
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

A filter for cleansing exhaust gas, esp. from diesel engines, includes a filter body with longitudinal channels which are sepd. by porous sepg. walls which are not penetrated by soot particles and gas tight plugs which seal part of the channel outlet end sections. A number of the channels are completely open, while numerous channels have their outlet ends covered by a process plate. ADVANTAGE - The filter is efficient and reliable, and high pressures are avoided.

Description

Die Erfindung betrifft einen Filter zur Abgasreinigung, insbe­ sondere von Dieselabgasen in einer Abgasanlage einer Brenn­ kraftmaschine gemäß den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen.The invention relates to a filter for exhaust gas purification, in particular special of diesel exhaust in an exhaust system of a burning Engine according to the preamble of claim 1 specified features.

Ein Filter der erfindungsgemäßen Bauart ist aus der DE-OS 31 01 026 bekannt. Von Nachteil bei einem derartigen Filter ist je­ doch, daß sich vor dem Abgasfilter bei zunehmender Rußbeladung auf Grund des abwechselnd eintritts- und austrittsseitigen gas­ dichten Verschlusses der Kanäle ein hoher Gegendruck aufstaut, der sich in einer Erhöhung des Kraftstoffverbrauchs und in ei­ ner Verschlechterung der Fahrleistung auswirkt.A filter of the type according to the invention is from DE-OS 31 01 026 known. The disadvantage of such a filter is ever but that in front of the exhaust filter with increasing soot loading due to the alternating gas on the inlet and outlet side tight sealing of the channels builds up a high back pressure, which results in an increase in fuel consumption and in egg deterioration in driving performance.

Des weiteren ist aus der DE-OS 36 38 096 ein Filter bekannt, bei dem die Austrittsöffnung einer Filterpatrone durch eine zweite Filterstufe aus losem Schüttgut abgedeckt ist.Furthermore, a filter is known from DE-OS 36 38 096, in which the outlet opening of a filter cartridge through a second filter stage from loose bulk material is covered.

Der Erfindung liegt daher die Aufgabe zugrunde, in einer Abgas­ anlage einer Brennkraftmaschine einen Filter zur Abgasreini­ gung, insbesondere von Dieselabgasen zu schaffen, mit dem ohne Beeinträchtigung eines guten Filterwirkungsgrades für Rußparti­ kel hohe Gegendrücke des Abgases vor dem Filter vermieden wer­ den. The invention is therefore based on the object in an exhaust gas Plant of an internal combustion engine a filter for exhaust gas purification supply, in particular of diesel exhaust gases, with the without Impairment of a good filter efficiency for soot parties high backpressures of the exhaust gas upstream of the filter the.  

Die Aufgabe ist erfindungsgemäß durch die im Patentanspruch 1 angegebenen kennzeichnenden Merkmale gelöst.The object is according to the invention in that in claim 1 specified characteristic features solved.

Dabei bleiben die Filterkanäle eintrittsseitig unverschlossen und sind austrittsseitig je nach gewünschtem Wirkungsgrad des Filters zu einem zu wählenden Teil ebenfalls offen. Durch diese Maßnahme wird erreicht, daß hohe Gegendrücke vor dem Filter auf Grund des Zusetzens des Filters bei zunehmender Motorlaufdauer infolge von Rußbeladung und Ablagerungen von Fremdstoffen, die aus dem motorischen Abrieb, Ölrückständen oder Zusätzen im Kraftstoff herrühren, vermieden werden. In den mit gasdichten Stopfen austrittsseitig fest verschlossenen und daher wie Sam­ meltaschen wirkenden Kanälen ergibt sich in Verbindung mit ei­ ner Platinbeschichtung der porösen Kanalwände eine besonders gute katalytische Umsetzung der rückgestauten gasförmigen Ab­ gasbestandteile sowie eine Verringerung der Partikelemission durch die Konversion der angelagerten Kohlenwasserstoff-Molekü­ le.The filter channels remain unlocked on the inlet side and are on the outlet side depending on the desired efficiency of the Filters for a part to be selected are also open. Through this Measure is achieved that high back pressures upstream of the filter Because of the clogging of the filter with increasing engine running time due to soot loading and foreign matter deposits from engine wear, oil residues or additives in the Fuel, be avoided. In the gas-tight Plug tightly closed on the outlet side and therefore like Sam channels with a melt pocket result in connection with egg A special platinum coating of the porous channel walls good catalytic conversion of the backflowed gaseous Ab gas components and a reduction in particle emissions through the conversion of the attached hydrocarbon molecules le.

In einer besonderen Ausgestaltung nach Anspruch 3 sind die Ka­ nalwände mit einer Washcoat-Beschichtung zur Oberflächenver­ größerung versehen. Die Oberflächenvergrößerung fördert dabei die Umsetzung der Abgase.In a special embodiment according to claim 3, the Ka Wall walls with a washcoat coating for surface provided enlargement. The surface enlargement promotes the implementation of exhaust gases.

Austrittsseitig ist am Filter zur Erhöhung seiner Festigkeit zusätzlich nach Anspruch 4 eine poröse Scheibe angeordnet. Fer­ ner besitzt die poröse Scheibe eine Sammelwirkung für die im Abgasstrom enthaltenen Rußpartikel. Durch Variation der Schei­ bendicke oder durch Verwendung unterschiedlich porösen Schei­ benmaterials kann jeder gewünschte Wirkungsgrad erzielt werden, wonach bei einer bestimmten Dicke oder einer bestimmten Porösi­ tät Abgaspulsationen vor dem Filter weitgehend vermieden werden können.On the outlet side is on the filter to increase its strength additionally arranged according to claim 4, a porous disc. Fer ner the porous disc has a collecting effect for the Soot particles contained in the exhaust gas stream. By varying the shit thickness or by using differently porous slices any desired efficiency can be achieved what with a certain thickness or a certain Porösi exhaust gas pulsations in front of the filter are largely avoided can.

In der nachfolgenden Zeichnungsbeschreibung wird ein Ausfüh­ rungsbeispiel der Erindung näher erläutert. In the following description of the drawing, an exec Example of the invention explained in more detail.  

Die Figur zeigt einen Filter mit Kanälen, mit austrittsseitigen Stopfen und mit einer austrittsseitigen porösen Scheibe im teilweisen Längsschnitt.The figure shows a filter with channels, with outlet-side Stopper and with a porous disc on the outlet side partial longitudinal section.

Ein Filterkörper 1 eines Filters 2 zur Abgasreinigung, insbe­ sondere von Dieselabgasen, in einer nicht weiter ausgeführten Abgasanlage einer Brennkraftmaschine weist längs der Abgasströ­ mungsrichtung verlaufende dicht nebeneinander liegende Kanäle 3 auf, welche poröse Wände 4 besitzen. Die Wände 4 sind mit einer hier nicht im einzelnen dargestellten Platin-Washcoat-Beschich­ tung versehen, welche eine katalytische Wirkung auf die gasför­ migen Bestandteile des Abgases besitzt. Die Kanäle 3 sind an ihren Einmündungsöffnungen 5 an abgaseintrittsseitigen Kanalen­ den 6 des Filterkörpers 1 offen. An abgasaustrittsseitigen Ka­ nalenden 7 des Filterkörpers 1 sind die Kanäle 3 im Bereich ihrer Ausmündungsöffnungen 8 abwechselnd mit Stopfen 9 aus ei­ nem hochwarmfesten Material, beispielsweise aus Keramik, gas­ dicht verschlossen, so daß insgesamt 50% der Kanäle 3 durchge­ hend offen sind. Eine Scheibe 10 aus einem porösen Werkstoff, beispielsweise aus einem Sintermetall oder einem Keramikschaum, schließt sich bündig an die Kanalenden 7 an und deckt diese quer zur Strömungsrichtung des Abgases ab.A filter body 1 of a filter 2 for exhaust gas purification, in particular of diesel exhaust gases, in an exhaust system of an internal combustion engine, which is not further developed, has closely adjacent channels 3 running along the exhaust gas flow direction, which have porous walls 4 . The walls 4 are provided with a platinum washcoat coating, not shown in detail here, which has a catalytic effect on the gas-shaped components of the exhaust gas. The channels 3 are open at the outlet openings 5 on the exhaust gas inlet channels 6 of the filter body 1 . At the exhaust outlet-side Ka channel ends 7 of the filter body 1 , the channels 3 in the region of their orifices 8 are alternately gas-tightly closed with plugs 9 made of a heat-resistant material, for example made of ceramic, so that a total of 50% of the channels 3 are continuously open. A disk 10 made of a porous material, for example made of a sintered metal or a ceramic foam, is flush with the channel ends 7 and covers them transversely to the flow direction of the exhaust gas.

Das Abgas strömt die Kanalenden 6 des Filterkörpers 1 an und durchdringt die dort vorgesehenen Kanäle 3 vorwiegend in Längs­ richtung. Dabei lagert sich an den Wänden 4 der Kanäle 3 ein Anteil der Rußpartikel ab. Die gasförmigen Bestandteile des Abgases durchdringen die Wände 4 auf Grund ihrer Porösität, wobei die Bestandteile auf Grund der katalytisch wirkenden Pla­ tin-Washcoat-Beschichtung der Wände 4 umgesetzt werden. In den mit den Stopfen 9 gasdicht verschlossenen Kanälen werden die Gase rückgestaut, was eine längere Verweilzeit der Gase im Fil­ ter bedingt. Daher erfolgt besonders in den verschlossenen Ka­ nälen eine gute Umsetzung des Abgases. Das weiterströmende Abgas wird in den durchgehend geöffneten Kanälen durch die ab­ schließend angeordnete poröse Scheibe 10 zuerst aufgehalten, durchsetzt dann diese aber zu einem Großteil und gelangt in die freie Atmosphäre.The exhaust gas flows to the channel ends 6 of the filter body 1 and penetrates the channels 3 provided there mainly in the longitudinal direction. A portion of the soot particles is deposited on the walls 4 of the channels 3 . The gaseous components of the exhaust gas penetrate the walls 4 due to their porosity, the components being implemented due to the catalytically active platinum washcoat coating of the walls 4 . In the gas-tightly sealed with the plug 9 channels, the gases are backed up, which requires a longer residence time of the gases in the filter. Therefore, the exhaust gas is converted well, especially in the sealed channels. The further flowing exhaust gas is first stopped in the continuously open channels by the porous disk 10 arranged from the end, but then passes through it to a large extent and reaches the free atmosphere.

Beim Abbrennen der Rußpartikel im Filterkörper 1 werden die Stopfen 9 stark temperaturbelastet, welche dabei abbrechen oder sich ablösen können. Die Anordnung der Scheibe 10 an den abgas­ austrittsseitigen Kanalenden 7 wirkt dabei auf die Lagerung der Stopfen 9 und damit auf den Filterkörper 1 stabilisierend.When the soot particles in the filter body 1 burn off, the plugs 9 are subjected to high temperatures, which may break off or become detached. The arrangement of the disc 10 on the exhaust gas outlet-side channel ends 7 has a stabilizing effect on the mounting of the plugs 9 and thus on the filter body 1 .

Claims (5)

1. Filter zur Abgasreinigung, insbesondere von Dieselabgasen in einer Abgasanlage einer Brennkraftmaschine mit einem Filterkör­ per mit durch poröse rußpartikelundurchlässige Trennwände ge­ trennten Längskanälen, wobei ein Teil der Kanäle an austritts­ seitigen Kanalenden mit einem gasdichten Stopfen verschlossen ist, dadurch gekennzeichnet, daß eine Anzahl der Kanäle (3) durchgehend offen ist und daß sämtliche Kanäle am austrittsseitigen Kanalende (7) durch eine poröse Scheibe (10) abgedeckt sind.1. Filter for exhaust gas purification, in particular of diesel exhaust gases in an exhaust system of an internal combustion engine with a filter body with longitudinal channels separated by porous soot-impermeable partition walls, with some of the channels being sealed at the outlet-side channel ends with a gas-tight stopper, characterized in that a number of Channels ( 3 ) is continuously open and that all channels at the outlet-side channel end ( 7 ) are covered by a porous disc ( 10 ). 2. Filter nach Anspruch 1, dadurch gekennzeichnet, daß 10%-50% der Kanäle (3) austrittsseitig mittels Stopfen (9) gasdicht verschlossen sind.2. Filter according to claim 1, characterized in that 10% -50% of the channels ( 3 ) are sealed gas-tight on the outlet side by means of plugs ( 9 ). 3. Filter nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß Wände (4) der Kanäle (3) mit einer Washcoat-Platin-Be­ schichtung versehen sind.3. Filter according to claims 1 or 2, characterized in that walls ( 4 ) of the channels ( 3 ) are provided with a washcoat-platinum coating. 4. Filter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die poröse Scheibe (10) Ausmündungsöffnungen (8) der Kanäle (3) quer zur Abgasströmungsrichtung abdeckt. 4. Filter according to one of claims 1 to 3, characterized in that the porous disc ( 10 ) orifices ( 8 ) of the channels ( 3 ) covers transversely to the exhaust gas flow direction. 5. Filter nach Anspruch 4, dadurch gekennzeichnet, daß die poröse Scheibe (10) aus Keramikschaum oder einem Sin­ termetall besteht.5. Filter according to claim 4, characterized in that the porous disc ( 10 ) consists of ceramic foam or a Sin termetall.
DE4033621A 1990-10-23 1990-10-23 Filter for cleansing exhaust gas, esp. from diesel engine - has filter body with longitudinal channels which are sepd. by porous sepg. walls which are not penetrated by soot particles Expired - Fee Related DE4033621C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4033621A DE4033621C1 (en) 1990-10-23 1990-10-23 Filter for cleansing exhaust gas, esp. from diesel engine - has filter body with longitudinal channels which are sepd. by porous sepg. walls which are not penetrated by soot particles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4033621A DE4033621C1 (en) 1990-10-23 1990-10-23 Filter for cleansing exhaust gas, esp. from diesel engine - has filter body with longitudinal channels which are sepd. by porous sepg. walls which are not penetrated by soot particles

Publications (1)

Publication Number Publication Date
DE4033621C1 true DE4033621C1 (en) 1992-06-25

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DE4033621A Expired - Fee Related DE4033621C1 (en) 1990-10-23 1990-10-23 Filter for cleansing exhaust gas, esp. from diesel engine - has filter body with longitudinal channels which are sepd. by porous sepg. walls which are not penetrated by soot particles

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995010582A1 (en) * 1993-10-13 1995-04-20 Exxon Chemical Patents Inc. Fuel additives
EP0667445A1 (en) * 1994-02-14 1995-08-16 Ford Motor Company Limited Spark ignition engine exhaust system
DE19607341A1 (en) * 1995-02-28 1996-08-29 Matsushita Electric Ind Co Ltd Exhaust gas purification appts. for diesel engine exhausts
WO2000050745A1 (en) * 1999-02-26 2000-08-31 Johnson Matthey Public Limited Company Monolithic catalyst/filter apparatus
DE10148180A1 (en) * 2001-09-28 2003-04-24 Keller Lufttechnik Gmbh & Co Kg Device for purifying exhaust gases on diesel engine testing stands comprises a suction unit for introducing the exhaust gas to a dry dust filter system, and a purification unit for purifying the dry dust filter system
WO2012067567A1 (en) * 2010-11-16 2012-05-24 Scania Cv Ab Particle filter for an exhaust system of a combustion engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3101026A1 (en) * 1981-01-15 1982-08-26 Engelhard Kali-Chemie Autocat Gmbh, 3000 Hannover BIFUNCTIONAL FILTER FOR TREATING EXHAUST GAS
DE3638096A1 (en) * 1986-11-07 1988-05-19 Seebeck Technoproduct Gmbh Process and apparatus for separating out aerosols in flowing gases

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3101026A1 (en) * 1981-01-15 1982-08-26 Engelhard Kali-Chemie Autocat Gmbh, 3000 Hannover BIFUNCTIONAL FILTER FOR TREATING EXHAUST GAS
DE3638096A1 (en) * 1986-11-07 1988-05-19 Seebeck Technoproduct Gmbh Process and apparatus for separating out aerosols in flowing gases

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995010582A1 (en) * 1993-10-13 1995-04-20 Exxon Chemical Patents Inc. Fuel additives
EP0667445A1 (en) * 1994-02-14 1995-08-16 Ford Motor Company Limited Spark ignition engine exhaust system
DE19607341A1 (en) * 1995-02-28 1996-08-29 Matsushita Electric Ind Co Ltd Exhaust gas purification appts. for diesel engine exhausts
DE19607341C5 (en) * 1995-02-28 2004-04-22 Matsushita Electric Industrial Co., Ltd., Kadoma Method and device for cleaning exhaust gases
WO2000050745A1 (en) * 1999-02-26 2000-08-31 Johnson Matthey Public Limited Company Monolithic catalyst/filter apparatus
DE10148180A1 (en) * 2001-09-28 2003-04-24 Keller Lufttechnik Gmbh & Co Kg Device for purifying exhaust gases on diesel engine testing stands comprises a suction unit for introducing the exhaust gas to a dry dust filter system, and a purification unit for purifying the dry dust filter system
DE10148180B4 (en) * 2001-09-28 2006-04-27 Keller Lufttechnik Gmbh & Co. Kg Device for exhaust gas purification on diesel engine test stands
WO2012067567A1 (en) * 2010-11-16 2012-05-24 Scania Cv Ab Particle filter for an exhaust system of a combustion engine
EP2640941A1 (en) * 2010-11-16 2013-09-25 Scania CV AB Particle filter for an exhaust system of a combustion engine
EP2640941A4 (en) * 2010-11-16 2015-01-28 Scania Cv Ab Particle filter for an exhaust system of a combustion engine

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