[go: up one dir, main page]

EP0275827B1 - Filter for cleaning the exhaust gases from diesel engines - Google Patents

Filter for cleaning the exhaust gases from diesel engines Download PDF

Info

Publication number
EP0275827B1
EP0275827B1 EP87810740A EP87810740A EP0275827B1 EP 0275827 B1 EP0275827 B1 EP 0275827B1 EP 87810740 A EP87810740 A EP 87810740A EP 87810740 A EP87810740 A EP 87810740A EP 0275827 B1 EP0275827 B1 EP 0275827B1
Authority
EP
European Patent Office
Prior art keywords
soot
filter
exhaust gases
diesel engines
foamed ceramic
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 - Lifetime
Application number
EP87810740A
Other languages
German (de)
French (fr)
Other versions
EP0275827A1 (en
Inventor
Tiberiu Mizrah
Albert Maurer
Ludwig Gauckler
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.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
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 Alusuisse Lonza Services Ltd filed Critical Alusuisse Lonza Services Ltd
Priority to AT87810740T priority Critical patent/ATE59883T1/en
Publication of EP0275827A1 publication Critical patent/EP0275827A1/en
Application granted granted Critical
Publication of EP0275827B1 publication Critical patent/EP0275827B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F01N3/02—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
    • F01N3/033—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 in combination with other devices
    • F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/30—Exhaust treatment

Definitions

  • the present invention relates to a filter for cleaning the exhaust gases from diesel engines.
  • soot components of the exhaust gases from diesel engines can be reduced in two ways: by optimizing the mixture preparation and the combustion process in the engine and by installing filters in the exhaust gas flow. Depending on the design of the filter, soot separation rates of 50 to 90% are usually achieved.
  • the soot filter Since the diesel exhaust soot filter would be clogged with soot within a short period of use, the soot must be burned periodically. The time period from one regeneration phase to another is called the regeneration interval. The filter regenerates itself under certain conditions. The soot deposits are burned at temperatures between 550 and 700 ° C. With catalytically coated filters, the ignition temperature can be reduced to approx. 400 ° C.
  • An open-pore foam ceramic is understood to mean a porous ceramic body with a three-dimensional network and cellular structure that contains a large number of continuous cavities.
  • the usually cylindrical or multi-disc ceramic body is brought into the exhaust gas flow from diesel engines in such a way that the exhaust gases act on the end face thereof and flow through them parallel to the axis or positively guided. The soot separation is greatest in the part of the filter initially flowed through and decreases rapidly with increasing flow.
  • the filter in the area to which the flow first flows has reached its soot deposit capacity and has to be regenerated after a relatively short time, but the remaining area of the filter is still capable of soot absorption, but is also already subjected to the regeneration process.
  • EP-PS 0 050 340 describes an exhaust gas filter device which contains such a ceramic body consisting of two clearly delimited areas with different cavities. The area to which the exhaust gases flow first should have 6 to 50 cavities per 2.54 cm, the subsequent area 20 to 150 cavities per 2.54 cm.
  • US-A-4 456 457 describes an exhaust gas purification device made of porous material, the exhaust gas stream first having to pass through a zone of higher cell density and then through a zone of low cell density. In the zone of higher cell density, electrical heating ensures that the deposited carbon particles burn off.
  • the inventors have therefore set themselves the task of reducing the soot ignition temperature in filters for cleaning the exhaust gases of diesel engines with open-cell foam ceramic.
  • the soot will settle more in the area with the denser pore structure and locally lead to a build-up of heat lead to significantly higher temperature peaks.
  • These locally occurring temperature peaks in turn locally burn the soot there and thus initiate the regeneration phase of the soot through the entire foam ceramic filter, the ignition temperature of the soot deposited in areas of the foam ceramic which do not have the denser pore structure being considerably lower than that caused by the means mentioned above.
  • the filter according to the invention consists of an open-pore foam ceramic which has about 1 to 50% by volume, preferably 10 to 25% by volume, of material with a denser pore structure.
  • the coarser ceramic material one with 30 to 80 pores per 2.54 cm is advantageously chosen, for the finer ceramic material one with 40 to 100 pores per 2.54 cm, the difference in the number of pores per 2.54 cm for the two materials being at least 10, preferably 20, is.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtering Materials (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Catalysts (AREA)

Abstract

In filters for cleaning the exhaust gases from diesel engines having openpored foam ceramic bodies, the deposited soot particles are burned up at temperatures of between 550 DEG and 700 DEG C. at periodic intervals. In order to lower the inflammation temperature of the soot in the regeneration phase of the filter, the ceramic bodies are catalytically coated. The region of the openpored foam ceramic body first subjected to the flow of the exhaust gases of the diesel engines has at least partly a denser pore structure than the remaining foam body so that the inflammation temperature can be lowered since temperature peaks occur in these regions on account of increased soot deposits, which temperature peaks lead to inflammation of the soot located there and consequently burn up all the soot deposited in the filter.

Description

Die vorliegende Erfindung betrifft ein Filter zur Reinigung der Abgase von Dieselmotoren.The present invention relates to a filter for cleaning the exhaust gases from diesel engines.

Die Russbestandteile der Abgase von Dieselmotoren können grundsätzlich auf zwei Wegen verringert werden: durch Optimierung der Gemischaufbereitung und des Verbrennungsablaufs im Motor und durch Einbau von Filtern in den Abgasstrom. Je nach Ausbildung des Filters werden üblicherweise Russabscheidungsgrade von 50 bis 90% erzielt.The soot components of the exhaust gases from diesel engines can be reduced in two ways: by optimizing the mixture preparation and the combustion process in the engine and by installing filters in the exhaust gas flow. Depending on the design of the filter, soot separation rates of 50 to 90% are usually achieved.

Da das Dieselabgasrussfilter innerhalb kurzer Zeit des Gebrauchs bereits mit Russ verstopft wäre, muss letzterer periodisch verbrannt werden. Die Zeitspanne von einer Regenerierungsphase zur anderen wird als Regenerierungsintervall bezeichnet. Unter bestimmten Bedingungen regeneriert sich das Filter von selbst. Die Russablagerungen werden dabei bei Temperaturen zwischen 550 und 700°C verbrannt. Mit katalytisch beschichteten Filtern kann die Entzündungstemperatur auf ca. 400°C herabgesetzt werden.Since the diesel exhaust soot filter would be clogged with soot within a short period of use, the soot must be burned periodically. The time period from one regeneration phase to another is called the regeneration interval. The filter regenerates itself under certain conditions. The soot deposits are burned at temperatures between 550 and 700 ° C. With catalytically coated filters, the ignition temperature can be reduced to approx. 400 ° C.

Aus der US-PS 4 264 346 ist es bekannt, für obgenannte Zwecke eine offenporige Schaumkeramik als filterwirksames Medium zu verwenden. Als offenporige Schaumkeramik wird dabei ein poröser Keramikkörper mit dreidimensionalem Netzwerk und zellularer Struktur, die eine Vielzahl von durchgehenden Hohlräumen enthält, verstanden. Der meist zylindrische oder aus mehreren Scheiben bestehende Keramikkörper wird derart in den Abgasstrom von Dieselmotoren gebracht, dass die Abgase denselben stirnseitig beaufschlagen und achsparallel oder zwangsgeführt durchströmen. Dabei ist die Russabscheidung im anfänglich durchströmten Teil des Filters am grössten und nimmt mit zunehmender Durchströmung schnell ab. Dies hat zur Folge, dass das Filter im zuerst angeströmten Bereich nach relativ kurzer Zeit seine Russablagerungsaufnahmekapazität erreicht hat und regeneriert werden muss, der restliche Bereich des Filters jedoch noch russaufnahmefähig ist, aber bereits ebenfalls dem Regenerierungsprozess unterworfen wird.From US Pat. No. 4,264,346 it is known to use an open-pore foam ceramic as the filter-effective medium for the above-mentioned purposes. An open-pore foam ceramic is understood to mean a porous ceramic body with a three-dimensional network and cellular structure that contains a large number of continuous cavities. The usually cylindrical or multi-disc ceramic body is brought into the exhaust gas flow from diesel engines in such a way that the exhaust gases act on the end face thereof and flow through them parallel to the axis or positively guided. The soot separation is greatest in the part of the filter initially flowed through and decreases rapidly with increasing flow. The result of this is that the filter in the area to which the flow first flows has reached its soot deposit capacity and has to be regenerated after a relatively short time, but the remaining area of the filter is still capable of soot absorption, but is also already subjected to the regeneration process.

Um die Russaufnahmekapazität des Filters über dem gesamten Querschnitt in Durchströmungsrichtung des Abgases gleichmässiger zu verteilen, wurde bereits vorgeschlagen, den zuerst angeströmten Bereich des Keramikkörpers mit grösseren Hohlräumen zu versehen als den zuletzt angeströmten Bereich, um dadurch zu verhindern, dass das Filter im zuerst angeströmten Bereich vorzeitig verstopft. In der EP-PS 0 050 340 wird eine Abgasfiltereinrichtung beschrieben, die einen derartigen, aus zwei deutlich abgegrenzten Bereichen mit unterschiedlichen Hohlräumen bestehenden Keramikkörper enthält. Der von den Abgasen zuerst angeströmte Bereich soll 6 bis 50 Hohlräume pro 2.54 cm, der nachfolgende Bereich 20 bis 150 Hohlräume pro 2.54 cm aufweisen.In order to distribute the soot absorption capacity of the filter more evenly over the entire cross-section in the direction of flow of the exhaust gas, it has already been proposed to provide the area of the ceramic body with the first inflow area with larger cavities than the area with the last inflow area, in order to prevent the filter from being in the area with the first inflow area clogged prematurely. EP-PS 0 050 340 describes an exhaust gas filter device which contains such a ceramic body consisting of two clearly delimited areas with different cavities. The area to which the exhaust gases flow first should have 6 to 50 cavities per 2.54 cm, the subsequent area 20 to 150 cavities per 2.54 cm.

Die US-A-4 456 457 beschreibt eine Abgasreinigungsvorrichtung aus porösem Material, wobei der Abgasstrom zuerst durch eine Zone höherer Zellendichte und dann durch eine Zone niedriger Zellendichte hindurchtreten muss. In der Zone höherer Zellendichte besorgt eine elektrische Beheizung für den Abbrand der abgeschiedenen Kohlenstoffpartikel.US-A-4 456 457 describes an exhaust gas purification device made of porous material, the exhaust gas stream first having to pass through a zone of higher cell density and then through a zone of low cell density. In the zone of higher cell density, electrical heating ensures that the deposited carbon particles burn off.

Obwohl durch die vorgenannten Massnahmen die Russablagerungsaufnahmekapazität des Keramikfilters verbessert werden kann, ist dem Problem, die Entzündungstemperatur des abgelagerten Russes herabzusetzen, um die Regenerierungsphase so früh als möglich einzuleiten, keine Beachtung geschenkt worden.Although the above measures can improve the soot deposit capacity of the ceramic filter, the problem of lowering the ignition temperature of the deposited soot to start the regeneration phase as early as possible has not been considered.

Die Erfinder haben sich daher die Aufgabe gestellt, bei Filtern zur Reinigung der Abgase von Dieselmotoren mit offenporiger Schaumkeramik die Russentzündungstemperatur zu erniedrigen.The inventors have therefore set themselves the task of reducing the soot ignition temperature in filters for cleaning the exhaust gases of diesel engines with open-cell foam ceramic.

Erfindungsgemäss wird die gestellte Aufgabe durch ein Filter gelöst, welches sich nach dem Wortlaut des Anspruchs 1 auszeichnet. Vorteilhafte Weiterbildungen des erfindungsgemässen Gegenstandes sich durch die Merkmale der Ansprüche 2 und 3 gekennzeichnet.According to the invention, the object is achieved by a filter which is distinguished by the wording of claim 1. Advantageous further developments of the subject matter according to the invention are characterized by the features of claims 2 and 3.

Aufgrund der Tatsache, dass der zuerst vom Abgasstrom angeströmte Bereich der Schaumkeramik bereits teilweise eine dichtere Porenstruktur aufweist, was bedeutet, dass in diesem Bereich die Hohlräume kleiner sind, wird sich im Bereich mit der dichteren Porenstruktur der Russ verstärkt absetzen und lokal zu einem Hitzestau mit wesentlich höheren Temperaturspitzen führen. Diese lokal entstehenden Temperaturspitzen führen wiederum lokal zu einem Abbrand des dortigen Russes und leiten damit durch Flammfortschritt durch das gesamte Schaumkeramikfilter die Regenerierungsphase desselben ein, wobei die Entzündungstemperatur des in Bereichen der Schaumkeramik, die die dichtere Porenstruktur nicht aufweisen, abgelagerten Russes erheblich tiefer liegt als die durch die eingangs genannten Mitteln bewirkte.Due to the fact that the area of the foam ceramic that is initially flown by the exhaust gas flow already partially has a denser pore structure, which means that the cavities are smaller in this area, the soot will settle more in the area with the denser pore structure and locally lead to a build-up of heat lead to significantly higher temperature peaks. These locally occurring temperature peaks in turn locally burn the soot there and thus initiate the regeneration phase of the soot through the entire foam ceramic filter, the ignition temperature of the soot deposited in areas of the foam ceramic which do not have the denser pore structure being considerably lower than that caused by the means mentioned above.

Um den Widerstand des Filters, der einen Gegendruck gegenüber dem Abgas erzeugt, nicht wesentlich zu erhöhen, was eine Herabsetzung der Motorleistung und eine Erhöhung des Treibstoffverbrauchs nach sich ziehen würde, hat es sich als notwendig erwiesen, die zuerst vom Abgasstrom beaufschlagte Fläche zu etwa 20 bis 50% mit einem Material mit dichterer Porenstruktur zu versehen.In order not to significantly increase the resistance of the filter, which creates a back pressure to the exhaust gas, which would result in a reduction in engine performance and an increase in fuel consumption, it has been found necessary to increase the surface area first affected by the exhaust gas flow to approximately 20 up to 50% to be provided with a material with a denser pore structure.

Bei in Personenkraftwagen eingesetzten Dieselmotoren, die mit Abgasfiltern ausgerüstet sind, sollte der Gegendruck bei maximal 0.2 bar liegen. Es hat sich gezeigt, dass solche Bedingunen erfüllt werden, wenn das erfindungsgemässe Filter aus einer offenporigen Schaumkeramik besteht, die etwa 1 bis 50 Vol.%, vorzugsweise 10 bis 25 Vol.%, Material mit dichterer Porenstruktur aufweist. Für das gröbere Keramikmaterial wird vorteilhafterweise eines mit 30 bis 80 Poren pro 2.54 cm, für das feinere Keramikmaterial eines mit 40 bis 100 Poren pro 2.54 cm gewählt, wobei die Differenz der Anzahl Poren pro 2.54 cm bei den beiden Materialien mindestens 10, vorzugsweise 20, beträgt.In diesel engines used in passenger cars, which are equipped with exhaust gas filters, the back pressure should be a maximum of 0.2 bar. It has been shown that such conditions are met if the filter according to the invention consists of an open-pore foam ceramic which has about 1 to 50% by volume, preferably 10 to 25% by volume, of material with a denser pore structure. For the coarser ceramic material, one with 30 to 80 pores per 2.54 cm is advantageously chosen, for the finer ceramic material one with 40 to 100 pores per 2.54 cm, the difference in the number of pores per 2.54 cm for the two materials being at least 10, preferably 20, is.

Des weiteren hat es sich als vorteilhaft erwiesen, in an sich bekannter Weise eine Querschnittsfläche der vom Abgasstrom zuerst angeströmten offenen Schaumkeramik von mindestens 200, vorzugsweise 250 cm2, vorzulegen.Furthermore, it has proven to be advantageous to provide, in a manner known per se, a cross-sectional area of at least 200, preferably 250 cm 2 of the open foam ceramic which is first flown by the exhaust gas flow.

Claims (4)

1. Filter for cleaning the exhaust gases from diesel engines, having an open-pored foamed ceramic body, characterized in that that region of the foamed ceramic against which the exhaust gas flows first has in part a denser pore structure than the remaining region, about 20 to 50% of that surface of the foamed ceramic body against which flow occurs first having a denser pore structure, and in that the region of the foamed ceramic having a denser pore structure amounts to 1 to 50% by vol.
2. Filter according to Claim 1, characterized in that the region of the foamed ceramic having a denser pore structure amounts to 10 to 25% by vol.
3. Filter according to either of Claims 1 and 2, characterized in that the coarser foamed ceramic has 30 to 80 pores per 2.54 cm and the finer foamed ceramic has 40 to 100 pores per 2.54 cm, the difference in the number of pores of the two foamed ceramics amounting to at least 10, preferably 20.
4. Filter according to one of Claims 1 to 3, characterized in that the cross sectional area acted upon first by the exhaust gases amounts to at least 200 cm2, preferably 250 cm2.
EP87810740A 1986-12-23 1987-12-11 Filter for cleaning the exhaust gases from diesel engines Expired - Lifetime EP0275827B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87810740T ATE59883T1 (en) 1986-12-23 1987-12-11 FILTERS FOR PURIFYING THE EXHAUST GASES FROM DIESEL ENGINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH512386 1986-12-23
CH5123/86 1986-12-23

Publications (2)

Publication Number Publication Date
EP0275827A1 EP0275827A1 (en) 1988-07-27
EP0275827B1 true EP0275827B1 (en) 1991-01-09

Family

ID=4288315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87810740A Expired - Lifetime EP0275827B1 (en) 1986-12-23 1987-12-11 Filter for cleaning the exhaust gases from diesel engines

Country Status (8)

Country Link
US (1) US4857088A (en)
EP (1) EP0275827B1 (en)
JP (1) JPS63167019A (en)
AT (1) ATE59883T1 (en)
DE (1) DE3767297D1 (en)
DK (1) DK667787A (en)
ES (1) ES2020298B3 (en)
GR (1) GR3001302T3 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03258911A (en) * 1990-03-08 1991-11-19 Ngk Insulators Ltd Filter for diesel particulate
WO1993010886A1 (en) * 1991-11-26 1993-06-10 Engelhard Corporation Ceria-alumina oxidation catalyst and method of use
JP4087897B2 (en) 1991-11-26 2008-05-21 バスフ・カタリスツ・エルエルシー Improved oxidation catalyst and method of use
US5250094A (en) 1992-03-16 1993-10-05 Donaldson Company, Inc. Ceramic filter construction and method
US6248684B1 (en) 1992-11-19 2001-06-19 Englehard Corporation Zeolite-containing oxidation catalyst and method of use
US5580535A (en) * 1994-07-07 1996-12-03 Engelhard Corporation System and method for abatement of food cooking fumes
JP4427658B2 (en) 1998-07-07 2010-03-10 コーニング インコーポレイテッド Diesel exhaust filter
DE10151698A1 (en) * 2001-10-19 2003-04-30 Eberspaecher J Gmbh & Co Exhaust system with particle filter for an internal combustion engine
FR2860993B1 (en) * 2003-10-16 2006-06-16 Sicat CATALYTIC FILTER BASED ON SILICON CARBIDE (B-SIC) FOR THE COMBUSTION OF SOILS FROM EXHAUST GASES OF A COMBUSTION ENGINE
CN103785226B (en) * 2014-03-06 2015-12-02 云南家润工贸有限公司 A kind of preparation method of ceramic element
EP3569528B1 (en) 2018-05-16 2020-07-29 Schneider Electric Industries SAS Transport system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050340B2 (en) * 1980-10-17 1991-01-16 Bridgestone Tire Company Limited Exhaust filter device for collecting particulates in engine exhaust gases and method for its manufacture
US4451441A (en) * 1981-01-27 1984-05-29 W. R. Grace & Co. Method for exhaust gas treatment
US4456457A (en) * 1981-04-28 1984-06-26 Nippon Soken, Inc. Exhaust gas cleaning device for diesel engine
JPS5893915A (en) * 1981-11-30 1983-06-03 Nippon Soken Inc Fine particle purifier of exhaust gas
JPS61129015A (en) * 1984-11-24 1986-06-17 Nippon Denso Co Ltd Filter for purifying exhaust gas and its preparation
US4600562A (en) * 1984-12-24 1986-07-15 Texaco Inc. Method and apparatus for filtering engine exhaust gas

Also Published As

Publication number Publication date
ATE59883T1 (en) 1991-01-15
GR3001302T3 (en) 1992-08-31
ES2020298B3 (en) 1991-08-01
EP0275827A1 (en) 1988-07-27
US4857088A (en) 1989-08-15
DE3767297D1 (en) 1991-02-14
DK667787D0 (en) 1987-12-18
JPS63167019A (en) 1988-07-11
DK667787A (en) 1988-06-24

Similar Documents

Publication Publication Date Title
DE602004011971T2 (en) hONEYCOMB STRUCTURE
DE602004011378T2 (en) HONEYCOMB STRUCTURE BODY
EP1294466B2 (en) Particle trap for separating particles from the flow of a liquid, method for separating particles from the flow of a liquid and use of said particle trap
EP0216729B1 (en) Filter plug for cleaning exhaust gases from diesel engines
DE102008010388B4 (en) Process for coating a diesel particulate filter and diesel particulate filter produced therewith
DE60304250T2 (en) Catalytic filter for purifying exhaust gases
DE3874263T2 (en) DEVICE AND METHOD FOR EXHAUST GAS TREATMENT OF DIESEL ENGINES.
DE60108347T2 (en) Diesel Particulate Filter
EP0312501B1 (en) Filter for the purification of exhaust gases from diesel engines
DE69502344T2 (en) Diesel particulate filter
DE60217084T2 (en) WAVE STRUCTURE AND ITS ARRANGEMENT
DE4005189C2 (en) Exhaust gas purification device for a diesel engine
DE69408733T2 (en) Filters for cleaning exhaust gases and filter media therefor
DE102006058554B4 (en) exhaust gas purification device
DE69507728T2 (en) Exhaust gas treatment method and apparatus
EP0275827B1 (en) Filter for cleaning the exhaust gases from diesel engines
DE3538107A1 (en) EXHAUST GAS FILTER
DE102015011432B4 (en) honeycombs
DE2953010T1 (en) DEVICE FOR PURIFYING EXHAUST GAS OF DIESEL ENGINE
DE10164480A1 (en) filter element
DE102012220181A1 (en) particulate Filter
EP1336034B1 (en) Method and device for aftertreatment of exhaust gases from combustion engines
EP0317515A1 (en) Filter for the purification of the exhaust gas of diesel engines
DE60212245T3 (en) Method and device for removing soot particles from the exhaust gas of a diesel engine
CH677814A5 (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19890107

17Q First examination report despatched

Effective date: 19891114

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALUSUISSE-LONZA SERVICES AG

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19910109

REF Corresponds to:

Ref document number: 59883

Country of ref document: AT

Date of ref document: 19910115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3767297

Country of ref document: DE

Date of ref document: 19910214

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19911211

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19911212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19911231

Ref country code: LI

Effective date: 19911231

Ref country code: CH

Effective date: 19911231

Ref country code: BE

Effective date: 19911231

Ref country code: AT

Effective date: 19911231

26N No opposition filed
REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3001302

BERE Be: lapsed

Owner name: ALUSUISSE-LONZA SERVICES A.G.

Effective date: 19911231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19920701

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920831

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19921212

REG Reference to a national code

Ref country code: GR

Ref legal event code: MM2A

Free format text: 3001302

EUG Se: european patent has lapsed

Ref document number: 87810740.8

Effective date: 19920704

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19930113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051211