DE19933442A1 - Particulate filter e.g. soot filter used in exhaust gas in an internal combustion engine has filter medium and catalyst forming rope-like shape and wound into one of the cylindrical filters - Google Patents

Particulate filter e.g. soot filter used in exhaust gas in an internal combustion engine has filter medium and catalyst forming rope-like shape and wound into one of the cylindrical filters

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Publication number
DE19933442A1
DE19933442A1 DE1999133442 DE19933442A DE19933442A1 DE 19933442 A1 DE19933442 A1 DE 19933442A1 DE 1999133442 DE1999133442 DE 1999133442 DE 19933442 A DE19933442 A DE 19933442A DE 19933442 A1 DE19933442 A1 DE 19933442A1
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Germany
Prior art keywords
filter
catalyst
filter medium
internal combustion
medium
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Granted
Application number
DE1999133442
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German (de)
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DE19933442B4 (en
Inventor
Nikolaus Moser
Olaf Weber
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.)
Mann and Hummel GmbH
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Filterwerk Mann and Hummel GmbH
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Application filed by Filterwerk Mann and Hummel GmbH filed Critical Filterwerk Mann and Hummel GmbH
Priority to DE1999133442 priority Critical patent/DE19933442B4/en
Publication of DE19933442A1 publication Critical patent/DE19933442A1/en
Application granted granted Critical
Publication of DE19933442B4 publication Critical patent/DE19933442B4/en
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Expired - Lifetime legal-status Critical Current

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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
    • F01N3/0212—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
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—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
    • F01N3/0217—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 the filtering elements having the form of hollow cylindrical bodies
    • 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
    • F01N3/0231—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 using special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (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)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

In particulate filter, the filter medium (17) and catalyst (14) are formed into rope-like shape and are wound up into one of the cylindrical filters (13a, 13b,22), where the catalyst in front of the filter medium is arranged in the stream direction of fluid to be filtered. The particulate filter, particularly soot filter for exhaust gas on internal combustion engine, has a filter medium (17) and a catalyst (14), which has a housing with an outlet (11) and an inlet (12). An Independent claim is included for a filter (13a,13b,22).

Description

Stand der TechnikState of the art

Die Erfindung betrifft ein Partikelfilter, insbesondere ein Rußfilter für das Abgas einer Brennkraftmaschine, welches ein Filtermedium und einen Katalysator aufweist, nach der Gattung des Patentanspruches 1. Außerdem betrifft die Erfindung einen Fil­ tereinsatz, der zum Einbau in das Partikelfilter geeignet ist.The invention relates to a particle filter, in particular a soot filter for the exhaust gas Internal combustion engine, which has a filter medium and a catalyst, after the genus of claim 1. In addition, the invention relates to a fil insert that is suitable for installation in the particle filter.

Die US 47 32 594 offenbart einen Abgasreiniger, welcher ein Filterelement aus porö­ sem Keramikmaterial aufweist. Dieser ist zur Aufnahme von Rußpartikeln geeignet. Sobald die Menge von im Filterelement eingefangenen Abgasteilchen ein vorher fest­ gelegtes Maß erreicht hat, werden die Abgasteilchen mit einem Brenner oder durch die Hitze des Abgases verbrannt, so daß das Filterelement regeneriert wird. Diese Einrichtung arbeitet jedoch nicht in allen Betriebszuständen der Brennkraftmaschine zuverlässig. Werden z. B. durch häufigen Kurzbetrieb der Brennkraftmaschine die zum Ausbrennen notwendigen Temperaturen des Abgases nicht erreicht, sammeln sich die abgeschiedenen Partikel an und führen aufgrund ihrer Menge zum Ausbren­ nen des Rußfilters, sobald das nächste Mal die Abgastemperaturen den zur Ver­ brennung nötigen Wert erreichen.The US 47 32 594 discloses an exhaust gas cleaner, which a filter element made of porö Sem ceramic material. This is suitable for picking up soot particles. Once the amount of exhaust gas particles trapped in the filter element is fixed beforehand exhaust gas particles are reached with a burner or through the heat of the exhaust gas is burned so that the filter element is regenerated. This However, the device does not work in all operating states of the internal combustion engine reliable. Are z. B. by frequent short operation of the engine Collect the temperatures of the exhaust gas that are necessary to burn out the separated particles accumulate and lead to burnout due to their quantity NEN the soot filter, the next time the exhaust gas temperatures to Ver to achieve the necessary value.

Aus der DE 42 07 005 A1 ist ein Rußfilter für das Abgas von Verbrennungskraftma­ schinen bekannt, welcher zusätzlich zum keramischen Rußfilter eine Umgehung in Form eines katalytischen Umwandlers besitzt. Ein Ausbrennen des keramischen Fil­ tereinsatzes wird dadurch vermieden, daß bei Erreichen einer kritischen Grenzbela­ dung gleichzeitig der Luftwiderstand des Partikelfilters ansteigt und so der katalyti­ sche Umwandler als Umgehung genutzt wird. Der katalytische Umwandler weist je­ doch ein schlechteres Abscheideverhalten als der Partikelabscheider auf, wodurch die Qualität des Abgases bei langfristigem Betrieb der Brennkraftmaschine im niedri­ gen Geschwindigkeitsbereich sinkt.DE 42 07 005 A1 describes a soot filter for the exhaust gas from internal combustion engines seem known, which in addition to the ceramic soot filter in a bypass Has the form of a catalytic converter. Burning out of the ceramic fil This is avoided by the fact that when a critical limit is reached At the same time, the air resistance of the particle filter increases and so does the catalytic converter is used as a bypass. The catalytic converter ever shows  but a poorer separation behavior than the particle separator, which means the quality of the exhaust gas during long-term operation of the internal combustion engine in the low speed range decreases.

Aufgabe der Erfindung ist es daher, ein Partikelfilter zu schaffen, das über einen gro­ ßen Temperaturbereich des zu filternden Fluids eine zuverlässige Abscheidung von Partikeln erlaubt, ohne daß dabei die Gefahr des Ausbrennens des Partikelfilters ent­ steht. Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.The object of the invention is therefore to provide a particle filter which has a large reliable temperature separation of the fluid to be filtered Particles allowed without ent the risk of burning out the particle filter ent stands. This object is achieved by the features of patent claim 1.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Partikelfilter ist insbesondere als Rußfilter für das Abgas ei­ ner Brennkraftmaschine geeignet. Es weist ein Filtermedium und einen Katalysator auf, welche durch eine entsprechende Anbringung in einem Gehäuse durch das zu filternde Medium durchströmt werden. Filtermedium und/oder Katalysator sind strangförmig ausgebildet, so daß sie sich zur Bildung eines Filtereinsatzes wickeln lassen. Auf diese Weise lassen sich wirtschaftliche Filtereinsätze fertigen, indem die Stränge z. B. auf einen Stützkörper aufgewickelt werden. Dabei ist zu beachten, daß in Strömungsrichtung des zu filternden Fluids gesehen der Katalysator vor dem Fil­ termedium angeordnet sein muß. Der Katalysator ist dazu geeignet, im zu filternden Medium Stickstoffdioxyd zu produzieren, mit dessen Hilfe im nachgeschalteten Parti­ kelfilter die angesammelten Partikel kontinuierlich abgebrannt werden können. Der wesentliche Vorteil dabei ist, daß die Konzentration der Partikel im Partikelfilter nie über einen kritischen Wert ansteigt, bei dem durch die Oxydation der Partikel so viel Wärme entstehen würde, daß der Partikelfilter ausbrennt.The particle filter according to the invention is in particular a soot filter for the exhaust gas Suitable internal combustion engine. It has a filter medium and a catalyst on, which by a corresponding attachment in a housing through the through filtering medium. Filter medium and / or catalyst strand-shaped so that they wrap to form a filter insert to let. In this way, economical filter cartridges can be manufactured by the Strands z. B. wound on a support body. It should be noted that seen in the flow direction of the fluid to be filtered, the catalyst in front of the fil term medium must be arranged. The catalyst is suitable for being filtered To produce medium nitrogen dioxide, with the help of which in the downstream part kelfilter the accumulated particles can be burned off continuously. The The main advantage is that the concentration of the particles in the particle filter never rises above a critical value at which so much due to the oxidation of the particles Heat would arise that the particle filter burns out.

Das Gehäuse des Partikelfilters weist einen Einlaß und einen Auslaß auf, so daß das zu filternde Fluid hindurchgeleitet werden kann. Das Gehäuse kann z. B. aus einem Auspufftopf bestehen, welcher einen Teil der Abgasanlage einer Brennkraftmaschine bildet. Dabei können Katalysator und Filtermedium gleichzeitig den Nebeneffekt einer Dämpfung des Auspuffgeräusches bewirken. The housing of the particle filter has an inlet and an outlet, so that the fluid to be filtered can be passed. The housing can e.g. B. from one Exhaust silencers exist, which are part of the exhaust system of an internal combustion engine forms. The catalyst and filter medium can have the side effect of one Exhaust noise dampening.  

Gemäß einer weiteren Ausgestaltung der Erfindung sind das Filtermedium und der Katalysator jeweils als Elementarzylinder ausgebildet. Jeder wird also für sich gewic­ kelt. Die beiden Elementarzylinder können zur Bildung eines Filtereinsatzes ineinan­ dergesteckt werden. Je nach Durchströmungsrichtung des Filtereinsatzes liegt der Katalysator außen oder innen vom Filtermedium. Wichtig ist, daß das zu filternde Fluid zuerst durch den Katalysator strömt.According to a further embodiment of the invention, the filter medium and the Catalyst each formed as an elementary cylinder. So everyone will be seen for themselves celt. The two elementary cylinders can fit into one another to form a filter insert be plugged in. Depending on the flow direction of the filter insert, the Catalyst outside or inside of the filter medium. It is important that that to be filtered Fluid first flows through the catalyst.

Eine weitere Möglichkeit der Bildung des Filtereinsatzes wird dadurch erreicht, daß Filtermedium und Katalysator in mehreren Schichten zu einer Filterkerze gewickelt werden. Dabei entsteht ein besonders kompaktes Filterelement, welches z. B. in ei­ nen Auspufftopf eingebaut werden kann. Dabei ist es vorteilhaft, die Filterkerze von innen nach außen zu durchströmen. Der Katalysator kann bei entsprechender Wahl des Materials, z. B. Metalldraht, gleichzeitig zur Stützung des Filtermediums dienen. Auf diese Weise wird der Aufwand für ein Stützmittel im Filtereinsatz gespart.Another way of forming the filter insert is achieved in that Filter medium and catalyst wrapped in several layers to form a filter cartridge become. This creates a particularly compact filter element, which, for. B. in egg a muffler can be installed. It is advantageous to remove the filter cartridge from to flow inside out. The catalyst can be chosen accordingly of the material, e.g. B. metal wire, also serve to support the filter medium. In this way, the effort for a proppant in the filter insert is saved.

Gemäß einer besonderen Ausgestaltung der Erfindung kann der Katalysator gleich­ zeitig Filterfunktion übernehmen. Das Filtermedium kann z. B. aus Keramikfasern, z. B. Siliziumoxyd bestehen, die vorzugsweise einen Durchmesser von 3 bis 20 µm be­ sitzen und zu Strängen von mehreren tausend Elementarfäden zusammengefaßt sein können. Diese Stränge werden dann in der beschriebenen Weise gewickelt. Zur Bildung des Katalysators können diese Filterstränge metallisch bedampft werden, wobei die metallische Bedampfung als Katalysator wirkt. Gleichzeitig stehen die Stränge noch zu einer Filterung zur Verfügung. Der Katalysator kann auf diese Weise gleichzeitig als Vorabscheider genutzt werden. Die in diesem Bereich abgeschiede­ nen Partikel lassen sich dann besonders wirkungsvoll verbrennen, weil hier gleich­ zeitig der Entstehungsort für das Stickstoffdioxyd ist.According to a special embodiment of the invention, the catalyst can be the same take over filter function in time. The filter medium can e.g. B. made of ceramic fibers, for. B. Silicon oxide exist, which preferably have a diameter of 3 to 20 microns sit and combined into strands of several thousand filaments could be. These strands are then wound in the manner described. For Formation of the catalyst, these filter strands can be metallized, the metallic vaporization acts as a catalyst. At the same time they are Strands still available for filtering. The catalyst can do this can also be used as a pre-separator. The most secluded in this area Particles can then be burned particularly effectively because they are the same here is the place of origin for the nitrogen dioxide.

Als Katalysator eigenen sich insbesondere metallische Oberflächen, die zur Herab­ setzung der zur Bildung von Stickstoffdioxyd notwendigen Aktivierungsenergie ver­ wendet werden.Metallic surfaces are particularly suitable as catalysts setting of the activation energy necessary for the formation of nitrogen dioxide be applied.

Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen her­ vor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird.These and other features of preferred developments of the invention go besides from the claims also from the description and the drawings before, the individual characteristics each individually or in groups in the form  of sub-combinations in the embodiment of the invention and on others Areas to be realized and advantageous as well as protectable designs can represent, for which protection is claimed here.

Zeichnungdrawing

Weitere Einzelheiten der Erfindung werden in der Zeichnung anhand von schemati­ schen Ausführungsbeispielen beschrieben. Hierbei zeigenFurther details of the invention are shown in the drawing with the aid of schemati described exemplary embodiments. Show here

Fig. 1 den Längsschnitt durch einen Auspufftopf, in den ein aus zwei Elementarzylindern bestehender Filtereinsatz eingebaut ist und Fig. 1 shows the longitudinal section through a muffler, in which a filter element consisting of two elementary cylinders is installed and

Fig. 2 eine Filterkerze, bei der das Filtermedium auf einen als Katalysator dienenden Drahtkörper aufgewickelt ist, im Längsschnitt. Fig. 2 shows a filter candle, in which the filter medium is wound on a wire body serving as a catalyst, in longitudinal section.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Ein Auspufftopf 10 gemäß Fig. 1 weist einen Einlaß 11 und einen Auslaß 12 auf. Durch diesen strömen die Abgase, was durch Pfeile angedeutet ist, wobei diese zwei Elementarzylinder 13a, 13b passieren. Der Elementarzylinder 13a dient als Kataly­ sator 14 und kann z. B. aus einem Streckmetallkorb bestehen, der mit den katalysa­ toraktiven Stoffen bedampft ist und der an einen Deckel 15 des Auspufftopfes mit Hilfe einer Lötverbindung 16 befestigt sein kann. Der Streckmetallkörper wird zur Herstellung um einen Dorn gewickelt und an der Nahtstelle verlötet.A muffler 10 according to FIG. 1 has an inlet 11 and an outlet 12 . The exhaust gases flow through this, which is indicated by arrows, whereby these two elementary cylinders 13 a, 13 b pass. The elementary cylinder 13 a serves as catalyst 14 and can, for. B. consist of an expanded metal basket, which is vaporized with the katala toroidal substances and which can be attached to a cover 15 of the muffler with the aid of a solder joint 16 . The expanded metal body is wrapped around a mandrel for production and soldered at the seam.

Der Elementarzylinder 13b weist ein Filtermedium 17 auf, welches auf ein Stützrohr 18 gewickelt ist. Das Stützrohr 18 dient gleichzeitig zur Befestigung des Elementar­ zylinders 13b am Auslaß 12 des Deckels 15 und weist an der dem Auslaß 12 abge­ wandten Seite eine Endscheibe 19 auf. Diese dient zur Abdichtung des Innenraums des Stützrohrs 18, welcher eine Reinseite 20 des Filters bildet und trennt damit eine Rohseite 21 des Filters ab. Gleiches gilt auch für den Elementarzylinder 13a, der in der beschriebenen Weise von der Endscheibe 19 abgedichtet wird, so daß die Aus­ puffgase durch den Katalysator 14 strömen müssen.The elementary cylinder 13 b has a filter medium 17 which is wound on a support tube 18 . The support tube 18 serves at the same time for fastening the elementary cylinder 13 b at the outlet 12 of the cover 15 and has an end plate 19 on the side facing the outlet 12 . This serves to seal the interior of the support tube 18 , which forms a clean side 20 of the filter and thus separates a raw side 21 of the filter. The same applies to the elementary cylinder 13 a, which is sealed in the manner described by the end plate 19 , so that the exhaust gases must flow through the catalyst 14 .

Fig. 2 zeigt eine alternative Ausgestaltung für das Filter. Dargestellt ist eine Filter­ kerze 22, die in der Weise in einen Auspufftopf eingebaut werden kann, wie dies in Fig. 1 dargestellt ist. Die Filterkerze weist ein Gitter, bestehend aus gewickeltem Draht 23 auf, wobei hierdurch ein stabiler Verband entsteht. Dieser ist mit Endschei­ ben 19 fest verbunden, wodurch die Filterkerze gebildet wird. Auf den Draht, der als Katalysator dient, ist das strangförmige Filtermedium 17 aufgewickelt. Die Durch­ strömungsrichtung der Filterkerze ist durch Pfeile angedeutet. Fig. 2 shows an alternative embodiment for the filter. Shown is a filter candle 22 , which can be installed in the manner of a muffler, as shown in Fig. 1. The filter candle has a grid consisting of wound wire 23 , which results in a stable association. This is firmly connected to end plates ben 19 , whereby the filter candle is formed. The strand-shaped filter medium 17 is wound onto the wire, which serves as a catalyst. The direction of flow of the filter candle is indicated by arrows.

Claims (8)

1. Partikelfilter, insbesondere Rußfilter für das Abgas einer Brennkraftmaschine, wobei dieser ein Filtermedium (17) und einen Katalysator (14) aufweist, welche in einem Gehäuse mit einem Einlaß (11) und einem Auslaß (12) untergebracht sind, dadurch gekennzeichnet, daß Filtermedium (17) und Katalysator (14) strang­ förmig ausgebildet sind und zur Bildung eines zylindrischen Filtereinsatzes (13a, 13b, 22) aufgewickelt sind, wobei in Strömungsrichtung des zu filternden Fluides gesehen der Katalysator vor dem Filtermedium angeordnet ist.1. Particulate filter, in particular soot filter for the exhaust gas of an internal combustion engine, which has a filter medium ( 17 ) and a catalyst ( 14 ) which are housed in a housing with an inlet ( 11 ) and an outlet ( 12 ), characterized in that Filter medium ( 17 ) and catalyst ( 14 ) are strand-shaped and are wound to form a cylindrical filter insert ( 13 a, 13 b, 22 ), the catalyst being arranged in front of the filter medium as seen in the flow direction of the fluid to be filtered. 2. Partikelfilter nach Anspruch 1, dadurch gekennzeichnet, daß Filtermedium (17) und Katalysator (14) jeweils als Elementarzylinder (13a, 13b) ausgebildet sind, die zur Bildung des Filtereinsatzes ineinander gesteckt sind.2. Particulate filter according to claim 1, characterized in that filter medium ( 17 ) and catalyst ( 14 ) are each formed as an elementary cylinder ( 13 a, 13 b) which are inserted into one another to form the filter insert. 3. Partikelfilter nach Anspruch 1, dadurch gekennzeichnet, daß Filtermedium (17) und Katalysator (14) mehrere Schichten der Wicklung einer Filterkerze (22) bil­ den.3. Particulate filter according to claim 1, characterized in that the filter medium ( 17 ) and catalyst ( 14 ) bil layers of the winding of a filter candle ( 22 ). 4. Partikelfilter nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Katalysator auf eine Stützfaser aufgedampft wird.4. Particulate filter according to one of the preceding claims, characterized in that that the catalyst is evaporated onto a support fiber. 5. Partikelfilter nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Katalysator (14) gleichzeitig zur Stützung des Filtermediums dient.5. Particulate filter according to one of the preceding claims, characterized in that the catalyst ( 14 ) serves at the same time to support the filter medium. 6. Partikelfilter nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Katalysator zusätzlich Filtereigenschaften aufweist.6. Particulate filter according to one of the preceding claims, characterized in that that the catalyst also has filter properties. 7. Partikelfilter nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Filtereinsatz in einem Auspufftopf (10) einer Brennkraftmaschine unter­ gebracht ist, wobei der Auspufftopf des Gehäuse bildet.7. Particulate filter according to one of the preceding claims, characterized in that the filter insert is placed in an exhaust pipe ( 10 ) of an internal combustion engine, the exhaust pipe forming the housing. 8. Filtereinsatz (13a, 13b, 22), dadurch gekennzeichnet, daß dieser zum Einbau in einen Partikelfilter gemäß einem der vorhergehenden Ansprüche geeignet ist.8. Filter insert ( 13 a, 13 b, 22 ), characterized in that it is suitable for installation in a particle filter according to one of the preceding claims.
DE1999133442 1999-07-16 1999-07-16 Particle filter with a filter medium and a catalyst Expired - Lifetime DE19933442B4 (en)

Priority Applications (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1209330A1 (en) * 2000-11-27 2002-05-29 W.C. Heraeus GmbH & Co. KG Tubular apparatus for separation and combustion of soot particles, and method for cleaning particles from exhaust gas and specially from diesel exhaust gas
FR2832756A1 (en) * 2001-11-27 2003-05-30 Ct De Rech S En Machines Therm Exhaust gas filtration device, especially for diesel engines, comprises a supported catalyst located within a filter
CN103191608A (en) * 2013-04-01 2013-07-10 中国市政工程西北设计研究院有限公司 Air pipe type garage purifier
CN103557048A (en) * 2013-11-06 2014-02-05 苏州佑瑞检测技术有限公司 Multi-chamber automobile exhaust purification device

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Publication number Priority date Publication date Assignee Title
US12037931B2 (en) * 2022-10-18 2024-07-16 Szu Cheng Ma Device increasing engine efficiency and reducing exhaust and noise

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DE4303850C1 (en) * 1993-02-10 1994-10-13 Alfred Buck Device for the catalytic cleaning of flowing gases, in particular exhaust gases from internal combustion engines
DE4125686C2 (en) * 1991-08-02 1995-05-11 Oberland Mangold Gmbh Exhaust gas filters for fuel engines and manufacturing methods
DE4339025C2 (en) * 1992-12-14 1997-08-07 Mannesmann Ag Device for cleaning polluted exhaust air
DE19824285A1 (en) * 1998-05-29 1999-12-02 Siegfried Kany Diesel engine exhaust filter based on ceramic fibers, which burns off soot particles

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DE3634360C2 (en) * 1986-09-03 1991-10-02 Ekkehard Prof. Dr.-Ing. 4300 Essen De Weber
DE4125686C2 (en) * 1991-08-02 1995-05-11 Oberland Mangold Gmbh Exhaust gas filters for fuel engines and manufacturing methods
DE4339025C2 (en) * 1992-12-14 1997-08-07 Mannesmann Ag Device for cleaning polluted exhaust air
DE4303850C1 (en) * 1993-02-10 1994-10-13 Alfred Buck Device for the catalytic cleaning of flowing gases, in particular exhaust gases from internal combustion engines
DE19824285A1 (en) * 1998-05-29 1999-12-02 Siegfried Kany Diesel engine exhaust filter based on ceramic fibers, which burns off soot particles

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1209330A1 (en) * 2000-11-27 2002-05-29 W.C. Heraeus GmbH & Co. KG Tubular apparatus for separation and combustion of soot particles, and method for cleaning particles from exhaust gas and specially from diesel exhaust gas
FR2832756A1 (en) * 2001-11-27 2003-05-30 Ct De Rech S En Machines Therm Exhaust gas filtration device, especially for diesel engines, comprises a supported catalyst located within a filter
WO2003048552A1 (en) * 2001-11-27 2003-06-12 Crmt Device for filtering exhaust gases of a diesel engine comprising a catalyst support incorporated in the filtering means
CN103191608A (en) * 2013-04-01 2013-07-10 中国市政工程西北设计研究院有限公司 Air pipe type garage purifier
CN103557048A (en) * 2013-11-06 2014-02-05 苏州佑瑞检测技术有限公司 Multi-chamber automobile exhaust purification device

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