EP0481229A1 - Soot particle filter - Google Patents
Soot particle filter Download PDFInfo
- Publication number
- EP0481229A1 EP0481229A1 EP91115757A EP91115757A EP0481229A1 EP 0481229 A1 EP0481229 A1 EP 0481229A1 EP 91115757 A EP91115757 A EP 91115757A EP 91115757 A EP91115757 A EP 91115757A EP 0481229 A1 EP0481229 A1 EP 0481229A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter
- soot particle
- soot
- particle filter
- grain size
- 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- Withdrawn
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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
- F01N3/023—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
- F01N3/025—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 fuel burner or by adding fuel to exhaust
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- 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
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- 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
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- 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
- F01N2330/08—Granular material
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- 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
Definitions
- the invention relates to a soot particle filter for cleaning diesel engine exhaust gases with ceramic filter bodies.
- soot particle filters are particularly intended for stationary diesel engines and diesel engines of commercial vehicles and industrial trucks.
- EP 0 320 458 A1 proposes a foam ceramic for soot particle filters for diesel engine exhaust gases. This is said to consist of cordierite.
- DE 32 35 363 A1 describes a ceramic soot particle filter with cylindrical filter bodies, in which the filter area is to be increased in order to reduce the pressure losses of the exhaust gas.
- Soot particle filters are also discussed in the company publication "Auto und boom", Daimler-Benz AG, May 1985, pages 24 to 28. Monolithic, ceramic filter bodies and wound filters are mentioned there, in which the filter bodies are formed by perforated steel tubes wrapped with ceramic yarn.
- soot particle filters require a high degree of separation for the soot particles, low exhaust gas pressure losses, high resistance to temperature changes and frequent thermal regeneration for burning off soot particles.
- the known soot particle filters only meet these requirements to a limited extent.
- the object of the invention is to propose a soot particle filter of the type mentioned, the filter means separates 60% to> 95% of the soot and withstands the thermal and mechanical loads occurring when the soot burns off.
- the above object is achieved in that the filter bodies consist of a high-temperature-resistant aluminum-silicate material with a refractory clay bond, that the material has a grain size between 0.1 mm and 0.8 mm and that the average pore diameter is between 0. 04 mm and 0.21 mm with an open porosity between 35% and 65%, preferably between 35 to 45%.
- filter bodies in the form of cylindrical hollow bodies or plates made of such a material ensure a high degree of separation, so that diesel soot emissions are considerably reduced.
- This can be attributed to the fact that the filter bodies oppose the exhaust gas with a comparatively large surface due to their grain size.
- the exhaust pressure losses are not so great that there is a considerable deterioration in the efficiency of the diesel engine.
- good thermal regenerability of the filter body is ensured. Because when the soot burns off, the surfaces practically do not sinter, so that the porosity is retained.
- the filter bodies withstand the operating temperatures and the temperatures occurring when the soot is burned off without further ado.
- the filter material is a bed of granulate, that the granulate consists of a high-temperature-resistant aluminum silicate, and that the grain size of the granulate is between 2 mm and 10 mm.
- FIG. 1 shows a soot particle filter schematically.
- a plurality of filter bodies 4 are arranged in a filter housing 1 between an exhaust gas inlet 2 and an exhaust gas outlet 3, said filter bodies being arranged in the form of cylindrical hollow bodies, one of which is shown in the figure, or plates. Instead, a fill layer can also be provided.
- a regeneration burner 5 is arranged on the filter housing 1, to which an air compressor 6 for combustion air driven by an electric motor and a metering valve 7 for fuel are connected on the one hand.
- the fuel is fed to the metering valve 7 via an injection pump 8.
- An ignition spark generator 9 is also provided.
- a control device 10 controls the ignition spark generator 9, the air compressor 6, the metering valve 7 and the injection pump 8.
- the control device 10 detects the pressure loss occurring at the filter bodies 4 between the exhaust gas inlet 2 and the exhaust gas outlet 3.
- the exhaust gas inlet 2 is supplied with soot-containing exhaust gas from a commercial vehicle diesel engine.
- the soot accumulates on the filter bodies 4.
- the pressure loss increases. If the pressure loss reaches a limit value, the control device 10 controls the air compressor 6, the injection pump 8, the metering valve 7 and the ignition spark generator 9 in such a way that the regeneration burner 5 switches on.
- the soot deposited on the filter bodies 4 then burns.
- the filter body 4 consist of a high temperature-resistant aluminum-silicate material with a fire-resistant clay bond.
- the ceramic material preferably has a proportion of approximately 63% by weight SiO 2 and 30% by weight A1 2 0 3 . Otherwise, the material contains constituents of Ti0 2 , CaO, MgO, Na 2 0 and K 2 0.
- the material from which the filter bodies 4 are made has a grain size between 0.1 mm and 0.8 mm.
- the grain size is preferably 0.3 mm or 0.5 mm.
- the average pore diameter is between 0.04 mm and 0.21 mm. It is preferably between 0.04 mm and 0.11 mm.
- the open porosity of the filter body 4 is between 35% and 65%, preferably between 35% and 45%.
- the wall thicknesses of the filter body 4 are between 3 mm and 15 mm. If 4 cylindrical hollow bodies are used as the filter body, then the outer diameter is between 15 mm and 80 mm. Their inner diameters are between 9 mm and 50 mm. The outside diameter is preferably 40 mm and the inside diameter is 30 mm.
- the slowly forming soot layer initially acts increasingly as a filter medium itself. A deposition efficiency of almost 100% is achieved. In this area, the filter body 4 acts as a pure surface filter.
- the filter material mentioned With an average pore diameter at the upper limit of the range mentioned, from approximately 0.15 mm, the pores are so large that the soot is practically no longer able to form filtering bridges over all pores on the surface.
- the degree of separation remains at around 60% and the pressure loss takes on a constant value.
- the filter body now acts as a depth filter.
- the degree of separation was 65%. With a grain size between 2 mm and 4 mm, the degree of separation was 90%.
Abstract
Description
Die Erfindung betrifft einen Rußpartikelfilter für die Reinigung von Dieselmotor-Abgasen mit keramischen Filterkörpern. Solche Rußpartikelfilter sind insbesondere für stationäre Dieselmotore und Dieselmotore von Nutzfahrzeugen und Flurförderfahrzeugen vorgesehen.The invention relates to a soot particle filter for cleaning diesel engine exhaust gases with ceramic filter bodies. Such soot particle filters are particularly intended for stationary diesel engines and diesel engines of commercial vehicles and industrial trucks.
In der DE 35 37 976 C1 ist ein Rußpartikelfilter mit plattenförmigen, keramischen Filterkörpern beschrieben. Durch den dort beschriebenen Aufbau wird eine hohe mechanische Festigkeit auch gegenüber schwingenden Belastungen erreicht.DE 35 37 976 C1 describes a soot particle filter with plate-shaped, ceramic filter bodies. Due to the structure described there, a high mechanical strength is achieved even against vibrating loads.
In der EP 0 320 458 A1 ist für Rußpartikelfilter für Dieselmotor-Abgase eine Schaumkeramik vorgeschlagen. Diese soll aus Cordierit bestehen.EP 0 320 458 A1 proposes a foam ceramic for soot particle filters for diesel engine exhaust gases. This is said to consist of cordierite.
In der DE 32 35 363 A1 ist ein keramischer Rußpartikelfilter mit zylindrischen Filterkörpern beschrieben, bei dem die Filterfläche zur Verringerung der Druckverluste des Abgases vergrößert werden soll.DE 32 35 363 A1 describes a ceramic soot particle filter with cylindrical filter bodies, in which the filter area is to be increased in order to reduce the pressure losses of the exhaust gas.
In der Firmenschrift "Auto und Umwelt", Daimler-Benz AG., Mai 1985, Seiten 24 bis 28, sind ebenfalls Rußpartikelfilter erörtert. Es sind dort monolithische, keramische Filterkörper und Wickel-Filter erwähnt, bei denen die Filterkörper von mit Keramikgarn umwickelten, gelochten Stahlrohren gebildet sind.Soot particle filters are also discussed in the company publication "Auto und Umwelt", Daimler-Benz AG, May 1985, pages 24 to 28. Monolithic, ceramic filter bodies and wound filters are mentioned there, in which the filter bodies are formed by perforated steel tubes wrapped with ceramic yarn.
Bei solchen Rußpartikelfiltern werden ein hoher Abscheidegrad für die Rußpartikel, geringe Abgas-Druckverluste, eine hohe Temperaturwechselbeständigkeit und eine oftmalige thermische Regenerierbarkeit zum Abbrennen abgelagerter Rußpartikel gefordert. Diese Forderungen erfüllen die bekannten Rußpartikelfilter nur beschränkt.Such soot particle filters require a high degree of separation for the soot particles, low exhaust gas pressure losses, high resistance to temperature changes and frequent thermal regeneration for burning off soot particles. The known soot particle filters only meet these requirements to a limited extent.
Aufgabe der Erfindung ist es, einen Rußpartikelfilter der eingangs genannten Art vorzuschlagen, dessen Filtermittel 60 % bis > 95 % des Rußes abscheidet und den beim Abbrennen des Rußes auftretenden thermischen und mechanischen Belastungen standhält.The object of the invention is to propose a soot particle filter of the type mentioned, the filter means separates 60% to> 95% of the soot and withstands the thermal and mechanical loads occurring when the soot burns off.
Erfindungsgemäß ist obige Aufgabe dadurch gelöst, daß die Filterkörper aus einem hochtemperaturbeständigen Aluminium-Silikat-Material mit einer feuerfesten Ton-Bindung bestehen, daß das Material eine Körnung zwischen 0,1 mm und 0,8 mm aufweist und daß der mittlere Porendurchmesser zwischen 0,04 mm und 0,21 mm bei einer offenen Porosität zwischen 35 % und 65 % liegt, bevorzugt zwischen 35 bis 45 %.According to the invention, the above object is achieved in that the filter bodies consist of a high-temperature-resistant aluminum-silicate material with a refractory clay bond, that the material has a grain size between 0.1 mm and 0.8 mm and that the average pore diameter is between 0. 04 mm and 0.21 mm with an open porosity between 35% and 65%, preferably between 35 to 45%.
Versuche haben gezeigt, daß Filterkörper in Form von zylindrischen Hohlkörpern oder Platten aus einem solchen Material einen hohen Abscheidegrad gewährleisten, so daß die Dieselruß-Emissionen beträchtlich reduziert sind. Dies läßt sich darauf zurückführen, daß die Filterkörper aufgrund ihrer Körnung dem Abgas eine vergleichsweise große Oberfläche entgegenstellen. Die Abgas-Druckverluste sind dennoch nicht so groß, daß es zu einer beträchtlichen Verschlechterung des Wirkungsgrades des Dieselmotors kommt. Insbesondere ist eine gute thermische Regenerierbarkeit der Filterkörper gewährleistet. Denn beim Abbrennen des Rußes versintern die Oberflächen praktisch nicht, so daß die Porosität erhalten bleibt.Experiments have shown that filter bodies in the form of cylindrical hollow bodies or plates made of such a material ensure a high degree of separation, so that diesel soot emissions are considerably reduced. This can be attributed to the fact that the filter bodies oppose the exhaust gas with a comparatively large surface due to their grain size. However, the exhaust pressure losses are not so great that there is a considerable deterioration in the efficiency of the diesel engine. In particular, good thermal regenerability of the filter body is ensured. Because when the soot burns off, the surfaces practically do not sinter, so that the porosity is retained.
Günstig ist auch, daß die Filterkörper den Betriebstemperaturen und den beim Abbrennen des Rußes auftretenden Temperaturen ohne weiteres standhalten.It is also favorable that the filter bodies withstand the operating temperatures and the temperatures occurring when the soot is burned off without further ado.
Eine andere Losung der Aufgabe zeichnet sich dadurch aus, daß das Filtermaterial eine Schüttschicht aus Granulat ist, daß das Granulat aus einem hochtemperaturbeständigen Aluminium-Silikat besteht und daß die Korngröße des Granulats zwischen 2 mm und 10 mm liegt. Auch bei dieser Ausführung ergeben sich die oben genannten Vorteile.Another solution to the problem is characterized in that the filter material is a bed of granulate, that the granulate consists of a high-temperature-resistant aluminum silicate, and that the grain size of the granulate is between 2 mm and 10 mm. The advantages mentioned above also result in this embodiment.
Vorteilhafte Ausgestaltungen ergeben sich aus der folgenden Beschreibung. Die Figur zeigt einen Rußpartikelfilter schematisch.Advantageous configurations result from the following description. The figure shows a soot particle filter schematically.
In einem Filtergehäuse 1 ist zwischen einem Abgaseintritt 2 und einem Abgasaustritt 3 eine Vielzahl von Filterkörpern 4 angeordnet, die von zylindrischen Hohlkörpern, von denen in der Figur einer gezeigt ist, oder Platten angeordnet. Es kann stattdessen auch eine Schüttschicht vorgesehen sein.A plurality of filter bodies 4 are arranged in a
An dem Filtergehäuse 1 ist ein Regenerierungsbrenner 5 angeordnet, an den einerseits ein elektromotorisch angetriebener Luftverdichter 6 für Brennluft und andererseits ein Dosierventil 7 für Brennstoff angeschlossen ist. Der Brennstoff wird dem Dosierventil 7 über eine Einspritzpumpe 8 zugeführt.A
Außerdem ist ein Zündfunkengeber 9 vorgesehen. Eine Steuereinrichtung 10 steuert den Zündfunkengeber 9, den Luftverdichter 6, das Dosierventil 7 und die Einspritzpumpe 8. Die Steuereinrichtung 10 erfaßt den zwischen dem Abgaseintritt 2 und dem Abgasaustritt 3 an den Filterkörpern 4 auftretenden Druckverlust.An
Dem Abgaseintritt 2 wird rußhaltiges Abgas eines Nutzfahrzeug-Dieselmotors zugeführt. Der Ruß lagert sich an den Filterkörpern 4 an. Dabei steigt der Druckverlust. Erreicht der Druckverlust einen Grenzwert, dann steuert die Steuereinrichtung 10 den Luftverdichter 6, die Einspritzpumpe 8, das Dosierventil 7 und den Zündfunkengeber 9 so an, daß der Regenerierungsbrenner 5 einschaltet. Es verbrennt dann der an den Filterkörpern 4 abgelagerte Ruß.The
Die Filterkörper 4 bestehen aus einem hochtemperaturbeständigen Aluminium-Silikat-Material mit einer feuerfesten Ton-Bindung. Vorzugsweise weist das keramische Material einen Anteil von etwa 63 Gew.-% Si02 und 30 Gew.-% A1203 auf. Im übrigen enthält das Material Bestandteile aus Ti02, CaO, MgO, Na20 und K20.The filter body 4 consist of a high temperature-resistant aluminum-silicate material with a fire-resistant clay bond. The ceramic material preferably has a proportion of approximately 63% by weight SiO 2 and 30% by weight A1 2 0 3 . Otherwise, the material contains constituents of Ti0 2 , CaO, MgO, Na 2 0 and K 2 0.
Das Material, aus dem die Filterkörper 4 bestehen, weist eine Körnung zwischen 0,1 mm und 0,8 mm auf. Vorzugsweise liegt die Körnung bei 0,3 mm oder 0,5 mm. Der mittlere Porendurchmesser liegt zwischen 0,04 mm und 0,21 mm. Vorzugsweise liegt er zwischen 0,04 mm und 0,11 mm. Die offene Porosität des Filterkörpers 4 liegt zwischen 35 % und 65 %, vorzugsweise zwischen 35 % und 45 %.The material from which the filter bodies 4 are made has a grain size between 0.1 mm and 0.8 mm. The grain size is preferably 0.3 mm or 0.5 mm. The average pore diameter is between 0.04 mm and 0.21 mm. It is preferably between 0.04 mm and 0.11 mm. The open porosity of the filter body 4 is between 35% and 65%, preferably between 35% and 45%.
Die Wanddicken der Filterkörper 4 liegen zwischen 3 mm und 15 mm. Werden als Filterkörper 4 zylindrische Hohlkörper verwendet, dann liegen der Außendurchmesser zwischen 15 mm und 80 mm. Ihre Innendurchmesser liegen zwischen 9 mm und 50 mm. Vorzugsweise beträgt der Außendurchmesser 40 mm und der Innendurchmesser 30 mm.The wall thicknesses of the filter body 4 are between 3 mm and 15 mm. If 4 cylindrical hollow bodies are used as the filter body, then the outer diameter is between 15 mm and 80 mm. Their inner diameters are between 9 mm and 50 mm. The outside diameter is preferably 40 mm and the inside diameter is 30 mm.
Es hat sich gezeigt, daß mit den beschriebenen Filterkörpern 4 hohe Abscheidegrade, von 80 % bis nahe 100 % erreichbar sind. Außerdem hat sich auch eine gute Regenerierbarkeit der Filterkörper 4 beim Abbrennen des Rußes ergeben.It has been shown that 4 high degrees of separation, from 80% to almost 100%, can be achieved with the filter bodies described. In addition, there has also been good regenerability of the filter body 4 when the soot is burned off.
Bei dem genannten Filtermaterial mit einem mittleren Porendurchmesser im genannten unteren Bereich bis etwa 0,08 mm wirkt die sich langsam ausbildende Rußschicht zunächst in zunehmendem Maße selbst als Filtermedium. Es wird dabei ein Abscheidungs-Wirkungsgrad von nahezu 100 % erreicht. In diesem Bereich wirkt der Filterkörper 4 als reiner Oberflächenfilter.In the case of the filter material mentioned, with an average pore diameter in the lower region mentioned of up to about 0.08 mm, the slowly forming soot layer initially acts increasingly as a filter medium itself. A deposition efficiency of almost 100% is achieved. In this area, the filter body 4 acts as a pure surface filter.
Bei dem genannten Filtermaterial mit einem mittleren Porendurchmesser an der Obergrenze des genannten Bereichs, ab etwa 0,15 mm, sind die Poren so weit, daß der Ruß praktisch nicht mehr in der Lage ist, über allen Poren an der Oberfläche filternde Brücken zu bilden. Der Abscheidegrad bleibt bei etwa 60 % und der Druckverlust nimmt einen konstanten Wert an. Der Filterkörper wirkt jetzt als Tiefenfilter.In the case of the filter material mentioned, with an average pore diameter at the upper limit of the range mentioned, from approximately 0.15 mm, the pores are so large that the soot is practically no longer able to form filtering bridges over all pores on the surface. The degree of separation remains at around 60% and the pressure loss takes on a constant value. The filter body now acts as a depth filter.
Bei einem Versuch, bei dem das Filtermaterial als Schüttschicht mit einer Höhe von 200 mm und einer Korngröße zwischen 4 mm und 10 mm vorgesehen war, ergab sich ein Abscheidegrad von 65 %. Bei einer Korngröße zwischen 2 mm und 4 mm ergab sich ein Abscheidegrad von 90 %.In an experiment in which the filter material was provided as a bed layer with a height of 200 mm and a grain size between 4 mm and 10 mm, the degree of separation was 65%. With a grain size between 2 mm and 4 mm, the degree of separation was 90%.
Claims (9)
dadurch gekennzeichnet,
daß die Filterkörper (4) aus einem hochtemperaturbeständigen Aluminium-Silikat-Material mit einer feuerfesten Ton-Bindung bestehen, daß das Material eine Körnung zwischen 0,1 mm und 0,8 mm aufweist und daß der mittlere Porendurchmesser zwischen 0,04 mm und 0,21 mm bei einer offenen Porosität zwischen 35 % und 65 % liegt.1. soot particle filter for cleaning diesel engine exhaust gases with ceramic filter bodies, for example in the form of cylindrical hollow bodies or plates,
characterized,
that the filter body (4) consist of a high-temperature-resistant aluminum silicate material with a refractory clay bond, that the material has a grain size between 0.1 mm and 0.8 mm and that the average pore diameter between 0.04 mm and 0 , 21 mm with an open porosity between 35% and 65%.
dadurch gekennzeichnet,
daß das Aluminium-Silikat-Material etwa 63 % Si02 und etwa 30 % A1203 enthält.2. soot particle filter according to claim 1,
characterized,
that the aluminum silicate material contains about 63% Si0 2 and about 30% A1 2 0 3 .
dadurch gekennzeichnet,
daß die Körnung des Materials zwischen 0,3 mm und 0,5 mm liegt und daß der mittlere Porendurchmesser zwischen 0,04 mm und 0,11 mm bei einer offenen Porosität zwischen 35 % und 45 % liegt.3. soot particle filter according to claim 1 or 2,
characterized,
that the grain size of the material is between 0.3 mm and 0.5 mm and that the mean pore diameter is between 0.04 mm and 0.11 mm with an open porosity between 35% and 45%.
dadurch gekennzeichnet,
daß die Wanddicke der Filterkörper (4) zwischen 3 mm und 15 mm liegt.4. soot particle filter according to one of the preceding claims,
characterized,
that the wall thickness of the filter body (4) is between 3 mm and 15 mm.
dadurch gekennzeichnet,
daß als Filterkörper (4) vorgesehene zylindrische Hohlkörper einen Außendurchmesser zwischen 15 mm und 80 mm und einen Innendurchmesser zwischen 9 mm und 50 mm aufweisen.5. soot particle filter according to one of the preceding claims,
characterized,
that cylindrical hollow bodies provided as filter bodies (4) have an outside diameter between 15 mm and 80 mm and an inside diameter between 9 mm and 50 mm.
dadurch gekennzeichnet,
daß der Außendurchmesser etwa 40 mm und der Innendurchmesser etwa 30 mm beträgt.6. soot particle filter according to claim 5,
characterized,
that the outer diameter is about 40 mm and the inner diameter is about 30 mm.
dadurch gekennzeichnet,
daß das Filtermittel eine Schüttschicht aus Granulat ist, daß das Granulat aus einem hochtemperaturbeständigen Aluminium-Silikat besteht und daß die Korngröße des Granulats zwischen 2 mm und 10 mm liegt.7. Particulate filter for cleaning diesel engine exhaust gases with a ceramic filter medium,
characterized,
that the filter medium is a bed of granulate, that the granulate consists of a high-temperature-resistant aluminum silicate and that the grain size of the granulate is between 2 mm and 10 mm.
dadurch gekennzeichnet,
daß das Aluminium-Silikat etwa 63 % Si02 und etwa 30 % A1203 enthält.8. soot particle filter according to claim 7,
characterized,
that the aluminum silicate contains about 63% Si0 2 and about 30% A1 2 0 3 .
dadurch gekennzeichnet,
daß die Korngröße des Granulats zwischen 2 mm und 4 mm liegt.9. soot particle filter according to claim 7 or 8,
characterized,
that the grain size of the granules is between 2 mm and 4 mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19904032086 DE4032086A1 (en) | 1990-10-10 | 1990-10-10 | SOOT PARTICLE FILTER |
| DE4032086 | 1990-10-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0481229A1 true EP0481229A1 (en) | 1992-04-22 |
Family
ID=6415975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91115757A Withdrawn EP0481229A1 (en) | 1990-10-10 | 1991-09-17 | Soot particle filter |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0481229A1 (en) |
| DE (1) | DE4032086A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0603392A1 (en) * | 1992-05-13 | 1994-06-29 | Sumitomo Electric Industries, Ltd | Particulate trap for purifying diesel engine exhaust gas |
| EP1953355A1 (en) * | 2007-01-26 | 2008-08-06 | Virgilio Pianu | Muffler filter |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3288536B2 (en) * | 1994-06-21 | 2002-06-04 | 日本碍子株式会社 | Exhaust gas filter and exhaust gas treatment device using the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3537976C1 (en) * | 1985-10-25 | 1987-04-23 | Didier Werke Ag | Filter device for soot particle filtration |
| US4662911A (en) * | 1982-03-18 | 1987-05-05 | Nippondenso Co., Ltd. | Equipment for trapping particulates in engine exhaust gas |
| DE3539641A1 (en) * | 1985-11-08 | 1987-05-14 | Edwin Dipl Ing Erben | Apparatus for filtering particles from gases |
| DE3537993A1 (en) * | 1985-10-25 | 1987-05-27 | Friedhelm Voelpel | Exhaust emission control device for spark ignition and diesel engines |
| DE3720963A1 (en) * | 1987-06-25 | 1989-01-05 | Metallgesellschaft Ag | Process and apparatus for separating off the ash from the gas arising in the combustion of coal |
| DE3926555A1 (en) * | 1988-12-15 | 1990-06-21 | Medizin Labortechnik Veb K | Cordierite ceramic filter - esp. for sterile gas filtration, formed from spray-dried granulate |
-
1990
- 1990-10-10 DE DE19904032086 patent/DE4032086A1/en not_active Withdrawn
-
1991
- 1991-09-17 EP EP91115757A patent/EP0481229A1/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4662911A (en) * | 1982-03-18 | 1987-05-05 | Nippondenso Co., Ltd. | Equipment for trapping particulates in engine exhaust gas |
| DE3537976C1 (en) * | 1985-10-25 | 1987-04-23 | Didier Werke Ag | Filter device for soot particle filtration |
| DE3537993A1 (en) * | 1985-10-25 | 1987-05-27 | Friedhelm Voelpel | Exhaust emission control device for spark ignition and diesel engines |
| DE3539641A1 (en) * | 1985-11-08 | 1987-05-14 | Edwin Dipl Ing Erben | Apparatus for filtering particles from gases |
| DE3720963A1 (en) * | 1987-06-25 | 1989-01-05 | Metallgesellschaft Ag | Process and apparatus for separating off the ash from the gas arising in the combustion of coal |
| DE3926555A1 (en) * | 1988-12-15 | 1990-06-21 | Medizin Labortechnik Veb K | Cordierite ceramic filter - esp. for sterile gas filtration, formed from spray-dried granulate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0603392A1 (en) * | 1992-05-13 | 1994-06-29 | Sumitomo Electric Industries, Ltd | Particulate trap for purifying diesel engine exhaust gas |
| EP0603392B1 (en) * | 1992-05-13 | 1996-12-18 | Sumitomo Electric Industries, Ltd | Particulate trap for purifying diesel engine exhaust gas |
| EP1953355A1 (en) * | 2007-01-26 | 2008-08-06 | Virgilio Pianu | Muffler filter |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4032086A1 (en) | 1992-04-16 |
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