DE3910554A1 - Particle filter built up using perforated tubes closed at one end - Google Patents

Particle filter built up using perforated tubes closed at one end

Info

Publication number
DE3910554A1
DE3910554A1 DE3910554A DE3910554A DE3910554A1 DE 3910554 A1 DE3910554 A1 DE 3910554A1 DE 3910554 A DE3910554 A DE 3910554A DE 3910554 A DE3910554 A DE 3910554A DE 3910554 A1 DE3910554 A1 DE 3910554A1
Authority
DE
Germany
Prior art keywords
closed
tubes
perforated tubes
filter
particle filter
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Withdrawn
Application number
DE3910554A
Other languages
German (de)
Inventor
Werner Engeler
Bernd Dipl Ing Poettner
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.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Priority to DE3910554A priority Critical patent/DE3910554A1/en
Publication of DE3910554A1 publication Critical patent/DE3910554A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B01D46/58—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 parallel
    • B01D46/60—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 parallel arranged concentrically or coaxially
    • 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
    • F01N3/0212—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 with one or more perforated tubes surrounded by filtering material, e.g. filter candles
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
    • 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

Abstract

A compact robust particle filter comprises a multiplicity of perforated tubes (1, 2, 3, 4) concentrically surrounding each other, of which the innermost tube (1) and individual intermediate spaces (6) between immediately adjacent tubes (2, 3) are open on the inlet side and closed on the outlet side (11, 10), while the remaining intermediate spaces (5, 7) between adjacent tubes (1, 2, 3, 4) are closed (8, 9) on the inlet side but are open on the outlet side so that the particle-laden exhaust gas, after radial diversion flows through the holes (1', 2', 3', 4') of the tubes (1, 2, 3, 4). <IMAGE>

Description

Die Erfindung betrifft ein Partikelfilter gemäß dem Oberbegriff des Patentanspruchs. Bei dem aus der US-PS 47 12 643, F01N 3/02, bekannten Partikelfilter dieses grundsätzlichen Aufbaus geht von einer eingangsseitigen Lochplatte des Filters eine größere Anzahl von an ihren anderen Enden verschlossenen Rohren ab, die mit Durch­ trittsöffnungen versehen und von zylindrischen Einrichtungen zum Auffangen der Partikel umgeben sind. Infolge der Anordnung dieser Sackrohre baut dieses bekannte Filter zumindest in Querrichtung relativ groß. Insbesondere in dem bevorzugten Einsatzfall der Erfindung, nämlich als Rußfilter für das Abgas eines ein Kraft­ fahrzeug antreibenden Dieselmotors, ist aber der zur Unterbringung des Filters zur Verfügung stehende Bauraum sehr begrenzt.The invention relates to a particle filter according to the preamble of the claim. In the case of US Pat. No. 4,712,643, F01N 3/02, known particle filter of this basic structure is based on a larger number of the perforated plate on the input side of the filter from pipes closed at their other ends, which with through provided openings and of cylindrical devices for Collecting the particles are surrounded. Due to the arrangement of these This well-known filter builds bag tubes at least in the transverse direction relatively large. Especially in the preferred application of the Invention, namely as a soot filter for the exhaust gas of a force vehicle driving diesel engine, but is for housing available space of the filter is very limited.

Bekannt sind ferner wabenartig aufgebaute Filter aus keramischem Material, die eine Vielzahl ebenfalls nebeneinander achsparallel verlaufender Strömungskanäle aufweisen, die in abwechselnder Folge an einem ihrer Enden verschlossen sind, so daß die partikelgeladene Gasströmung Querwände zwischen benachbarten Kanälen durchströmen muß, wobei die Partikel zurückgehalten werden. Gemeinsam mit dem eingangs beschriebenen Stand der Technik ist diesen wie Katalysator­ träger aufgebauten Filtern also das Vorsehen nebeneinander verlaufen­ der Strömungskanäle, jedoch ist bekannt, daß die wabenförmigen Filter Schwierigkeiten hinsichtlich der Erzielung großer Standzeiten bieten, wenn zum Regenerieren des Filters zeitweilig die Temperatur des Abgases im Bereich des Filters erhöht wird. Eine derartige Temperaturerhöhung ist erforderlich, damit die niedergeschlagenen Rußpartikel ihre Zündtemperatur erreichen.Honeycomb filters made of ceramic are also known Material that is also parallel to each other axially parallel have flowing flow channels in an alternating sequence are closed at one of their ends so that the particle-loaded Gas flow through transverse walls between adjacent channels must, with the particles being retained. Together with the  The prior art described at the outset is like a catalyst slower filters so the provision runs side by side the flow channels, however, it is known that the honeycomb Filters difficulties in achieving long service lives offer if the temperature is temporarily to regenerate the filter of the exhaust gas in the area of the filter is increased. Such one Temperature increase is required so that the depressed Soot particles reach their ignition temperature.

Der Erfindung liegt die Aufgabe zugrunde, ein Partikelfilter gemäß dem Oberbegriff des Patentanspruchs so auszubilden, daß auch bei begrenztem zur Verfügung stehenden Bauraum hinreichende Strömungs­ querschnitte für das Abgas bei guter Filterwirkung vorliegen.The invention is based on the object of a particle filter train the preamble of the claim so that also limited space available sufficient flow cross-sections for the exhaust gas are available with a good filter effect.

Die erfindungsgemäße Lösung dieser Aufgabe besteht in den kennzeich­ nenden Merkmalen des Patentanspruchs.The inventive solution to this problem consists in the character ning features of the claim.

Infolge der erfindungsgemäßen konzentrischen Anordnung der gelochten Rohre ist im Filter jeglicher Totraum vermieden. Durch entsprechende Wahl der Anzahl der konzentrischen gelochten Rohre kann bei maximalem Strömungsquerschnitt die gewünschte Filterwirkung eingestellt werden. Zur Feineinstellung, insbesondere zur Bestimmung der Größe der Partikel, die gerade noch zurückgehalten werden sollen, kann es zweckmäßig sein, durch Wahl der Lochgröße und/oder des Lochab­ stands eine Optimierung vorzunehmen.As a result of the concentric arrangement of the perforated according to the invention Pipes any dead space is avoided in the filter. By appropriate Choice of the number of concentric perforated tubes can be at maximum Flow cross section set the desired filter effect will. For fine adjustment, especially for determining the size the particles that are just about to be retained it may be appropriate by choosing the hole size and / or the hole to optimize.

Ein Ausführungsbeispiel der Erfindung für den Fall eines Rußfilters für einen Dieselmotor wird im folgenden anhand der Figur erläutert, die perspektivisch einen Schnitt wiedergibt.An embodiment of the invention in the case of a soot filter for a diesel engine is explained below with reference to the figure, which reproduces a section in perspective.

In dem gezeigten Ausführungsbeispiel besteht das eigentliche Filter, das in einem nicht gezeigten, gasdichten Gehäuse untergebracht ist, aus vier konzentrisch angeordneten Rohren 1, 2, 3 und 4, die alle mit Löchern 1′, 2′, 3′ und 4′ solcher Dimensionierung versehen sind, daß in dem innersten Rohr 1 und den Zwischenräumen 5, 6 und 7 zwischen einander unmittelbar umgebenden Rohren die Partikel des Abgases zurückgehalten werden.In the embodiment shown, the actual filter, which is housed in a gas-tight housing, not shown, consists of four concentrically arranged tubes 1 , 2 , 3 and 4 , all with holes 1 ', 2 ', 3 'and 4 ' of such dimensions are provided that the particles of the exhaust gas are retained in the innermost tube 1 and the spaces 5 , 6 and 7 between directly surrounding tubes.

Das partikelgeladene Abgas ist in der Figur durch gefüllte Pfeile, das gereinigte Abgas durch leere Pfeile angedeutet. Die Zwischen­ räume 5 und 7 sind eintrittsseitig durch Querwände 8 und 9 verschlos­ sen, während der Zwischenraum 6 austrittsseitig durch die Querwand 10 abgeschlossen ist. Eine derartige austrittsseitige Querwand 11 ist auch dem innersten Rohr 1 zugeordnet. Das bedeutet, daß das partikelgeladene Abgas in das innerste Rohr 1 und in den Zwischen­ raum 6 einströmt, in radiale Richtungen umgelenkt wird und demgemäß die Löcher 1′, 2′, 3′ und gegebenenfalls 4′ durchströmt, so daß sowohl im innersten Rohr 1 als auch in Zwischenräumen zwischen aufeinanderfolgenden Rohren durch das Zusammenwirken von Umlenkung der Abgasströmung und Durchsetzen von Löchern die Partikel abgeschie­ den werden. Dabei ist es möglich, über die Länge des Filters die Lochabstände und/oder Lochdurchmesser derart unterschiedlich zu wählen, daß beispielsweise zuerst die größeren Partikel und dann die feineren Partikel zurückgehalten werden.The particle-laden exhaust gas is indicated in the figure by filled arrows, the cleaned exhaust gas by empty arrows. The intermediate spaces 5 and 7 are sen on the entry side by transverse walls 8 and 9 , while the intermediate space 6 is closed on the exit side by the transverse wall 10 . Such an outlet-side transverse wall 11 is also assigned to the innermost tube 1 . This means that the particle-laden exhaust gas flows into the innermost tube 1 and in the intermediate space 6 , is deflected in radial directions and accordingly flows through the holes 1 ', 2 ', 3 'and optionally 4' , so that both in the innermost tube 1 as well as in spaces between successive tubes by the interaction of deflection of the exhaust gas flow and penetration of holes, the particles are separated. It is possible to choose the hole spacing and / or hole diameter so differently over the length of the filter that, for example, first the larger particles and then the finer particles are retained.

Das Filter ist auf bekannte Weise, beispielsweise durch Additivzusatz zum Kraftstoff bzw. zum Abgas oder durch zeitweilige Temperaturer­ höhung bis zum Erreichen der Rußabbrenntemperatur, regenerierbar. Infolge Verwendung elektrisch leitender Bleche kann diese Temperatur­ erhöhung durch direkten Stromdurchgang (bei elektrisch isolierter Befestigung des Filters) erfolgen. Mit der Erfindung ist demgemäß ein Partikelfilter geschaffen, das bei optimaler Filterwirkung den Vorteil großer Robustheit und eines kompakten Aufbaus besitzt.The filter is in a known manner, for example by adding additives to fuel or exhaust gas or by temporary temperature Increase until the soot burning temperature is reached, regenerable. As a result of the use of electrically conductive sheets, this temperature can increase through direct current passage (with electrically insulated Attach the filter). With the invention is accordingly created a particle filter with an optimal filter effect has the advantage of great robustness and a compact design.

Claims (1)

Unter Verwendung einseitig verschlossener gelochter Rohre aufgebautes Partikelfilter für eine partikelgeladene Gasströmung, insbesondere Rußfilter für das Abgas eines Dieselmotors, dadurch gekennzeichnet, daß die gelochten Rohre (1, 2, 3, 4) konzentrisch unter Bildung von Ringräumen (5, 6, 7) angeordnet sind, die in wechselnder Folge an einem ihrer Enden verschlossen (8, 9, 10, 11) sind, wobei die auf einer Stirnseite liegenden offenen Enden von innerstem Rohr (1) und Ringräumen (6) sowie die auf der anderen Stirnseite, auf der das innerste Rohr (1) verschlossen (11) ist, liegenden offenen Enden von Ringräumen (5, 7) Ein- und Auslaß für die Gasströmung bilden.Particulate filter for particle-laden gas flow, constructed using perforated tubes which are closed on one side, in particular soot filters for the exhaust gas of a diesel engine, characterized in that the perforated tubes ( 1 , 2 , 3 , 4 ) are arranged concentrically with the formation of annular spaces ( 5 , 6 , 7 ) are, which are closed in alternating sequence at one of their ends ( 8 , 9 , 10 , 11 ), the open ends of the innermost tube ( 1 ) and annular spaces ( 6 ) lying on one end face and those on the other end face, on the the innermost tube ( 1 ) is closed ( 11 ), lying open ends of annular spaces ( 5 , 7 ) form inlet and outlet for the gas flow.
DE3910554A 1988-04-11 1989-04-01 Particle filter built up using perforated tubes closed at one end Withdrawn DE3910554A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE3910554A DE3910554A1 (en) 1988-04-11 1989-04-01 Particle filter built up using perforated tubes closed at one end

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3811957 1988-04-11
DE3910554A DE3910554A1 (en) 1988-04-11 1989-04-01 Particle filter built up using perforated tubes closed at one end

Publications (1)

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DE3910554A1 true DE3910554A1 (en) 1989-10-19

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992017688A1 (en) * 1991-04-05 1992-10-15 Minnesota Mining And Manufacturing Company Concentric-tube diesel particulate filter
WO1992017691A1 (en) * 1991-04-05 1992-10-15 Minnesota Mining And Manufacturing Company Electrically regenerable diesel particulate trap
US5171341A (en) * 1991-04-05 1992-12-15 Minnesota Mining And Manufacturing Company Concentric-tube diesel particulate filter
US5174969A (en) * 1991-04-05 1992-12-29 Minnesota Mining And Manufacturing Company Roll-pack diesel particulate filter
US5223009A (en) * 1991-09-11 1993-06-29 Mercedes-Benz A.G. Exhaust gas equipment for an internal combustion engine
US5248482A (en) * 1991-04-05 1993-09-28 Minnesota Mining And Manufacturing Company Diesel particulate trap of perforated tubes wrapped with cross-wound inorganic yarn to form four-sided filter traps
US5248481A (en) * 1992-05-11 1993-09-28 Minnesota Mining And Manufacturing Company Diesel particulate trap of perforated tubes having laterally offset cross-wound wraps of inorganic yarn
US5298046A (en) * 1993-01-06 1994-03-29 Minnesota Mining And Manufacturing Company Diesel particulate filter element and filter
DE4243003A1 (en) * 1992-12-18 1994-06-23 S & B Beteiligungs Und Verwalt Device for cleaning soot-containing exhaust gases, in particular the exhaust gases from diesel internal combustion engines
US5409669A (en) * 1993-01-25 1995-04-25 Minnesota Mining And Manufacturing Company Electrically regenerable diesel particulate filter cartridge and filter
US5656048A (en) * 1994-04-06 1997-08-12 Minnesota Mining And Manufacturing Company Electrically regenerable diesel particulate filter cartridge and filter
US5702494A (en) * 1995-06-09 1997-12-30 Minnesota Mining And Manufacturing Company Airbag filter assembly and method of assembly thereof
US5922291A (en) * 1996-06-15 1999-07-13 Daimler-Benz Ag Reforming reactor system and particle filter usable therefor
EP1129759A1 (en) * 2000-02-29 2001-09-05 WAM S.p.A. A dust filter for gas
WO2008035127A1 (en) * 2006-09-20 2008-03-27 Aristotle University Thessaloniki- Research Committee Gas treatment device
CN102671487A (en) * 2012-06-06 2012-09-19 北京信高实验室设备有限公司 Medium-immobilizing device
EP3795231A1 (en) * 2019-09-20 2021-03-24 Vitesco Technologies GmbH Filter for exhaust gas treatment

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992017688A1 (en) * 1991-04-05 1992-10-15 Minnesota Mining And Manufacturing Company Concentric-tube diesel particulate filter
WO1992017691A1 (en) * 1991-04-05 1992-10-15 Minnesota Mining And Manufacturing Company Electrically regenerable diesel particulate trap
US5171341A (en) * 1991-04-05 1992-12-15 Minnesota Mining And Manufacturing Company Concentric-tube diesel particulate filter
US5174969A (en) * 1991-04-05 1992-12-29 Minnesota Mining And Manufacturing Company Roll-pack diesel particulate filter
US5248482A (en) * 1991-04-05 1993-09-28 Minnesota Mining And Manufacturing Company Diesel particulate trap of perforated tubes wrapped with cross-wound inorganic yarn to form four-sided filter traps
US5258164A (en) * 1991-04-05 1993-11-02 Minnesota Mining And Manufacturing Company Electrically regenerable diesel particulate trap
US5223009A (en) * 1991-09-11 1993-06-29 Mercedes-Benz A.G. Exhaust gas equipment for an internal combustion engine
US5248481A (en) * 1992-05-11 1993-09-28 Minnesota Mining And Manufacturing Company Diesel particulate trap of perforated tubes having laterally offset cross-wound wraps of inorganic yarn
DE4243003A1 (en) * 1992-12-18 1994-06-23 S & B Beteiligungs Und Verwalt Device for cleaning soot-containing exhaust gases, in particular the exhaust gases from diesel internal combustion engines
US5298046A (en) * 1993-01-06 1994-03-29 Minnesota Mining And Manufacturing Company Diesel particulate filter element and filter
US5409669A (en) * 1993-01-25 1995-04-25 Minnesota Mining And Manufacturing Company Electrically regenerable diesel particulate filter cartridge and filter
US5656048A (en) * 1994-04-06 1997-08-12 Minnesota Mining And Manufacturing Company Electrically regenerable diesel particulate filter cartridge and filter
US5702494A (en) * 1995-06-09 1997-12-30 Minnesota Mining And Manufacturing Company Airbag filter assembly and method of assembly thereof
US5922291A (en) * 1996-06-15 1999-07-13 Daimler-Benz Ag Reforming reactor system and particle filter usable therefor
EP1129759A1 (en) * 2000-02-29 2001-09-05 WAM S.p.A. A dust filter for gas
WO2008035127A1 (en) * 2006-09-20 2008-03-27 Aristotle University Thessaloniki- Research Committee Gas treatment device
US8236250B2 (en) 2006-09-20 2012-08-07 Aristotle University Thessaloniki, Research Committee Gas treatment device
CN102671487A (en) * 2012-06-06 2012-09-19 北京信高实验室设备有限公司 Medium-immobilizing device
CN102671487B (en) * 2012-06-06 2015-01-14 北京信高实验室设备有限公司 Medium-immobilizing device
EP3795231A1 (en) * 2019-09-20 2021-03-24 Vitesco Technologies GmbH Filter for exhaust gas treatment
DE102019214362A1 (en) * 2019-09-20 2021-03-25 Vitesco Technologies GmbH Filters for exhaust aftertreatment
DE102019214362B4 (en) 2019-09-20 2021-09-16 Vitesco Technologies GmbH Filters for exhaust aftertreatment

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