EP0326659A1 - Regenerable soot filter for the exhaust gases of internal-combustion engines - Google Patents

Regenerable soot filter for the exhaust gases of internal-combustion engines Download PDF

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Publication number
EP0326659A1
EP0326659A1 EP88118670A EP88118670A EP0326659A1 EP 0326659 A1 EP0326659 A1 EP 0326659A1 EP 88118670 A EP88118670 A EP 88118670A EP 88118670 A EP88118670 A EP 88118670A EP 0326659 A1 EP0326659 A1 EP 0326659A1
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EP
European Patent Office
Prior art keywords
housing
combustion chamber
soot filter
cover
inlet
Prior art date
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Granted
Application number
EP88118670A
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German (de)
French (fr)
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EP0326659B1 (en
Inventor
Karl Böhme
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Huss Maschinenfabrik GmbH and Co KG
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Huss Maschinenfabrik GmbH and Co KG
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Priority to AT88118670T priority Critical patent/ATE60824T1/en
Publication of EP0326659A1 publication Critical patent/EP0326659A1/en
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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
    • 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
    • F01N3/027—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 electric or magnetic heating means
    • 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
    • F01N2270/00—Mixing air with exhaust gases
    • 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
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
    • 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 regenerable soot filter for the exhaust gas from internal combustion engines, with a housing which has inlet and outlet connections for the exhaust gas and thermal insulation, with at least one filter body in the housing and with a combustion chamber between the exhaust gas inlet connection and the filter body, in which deposited soot particles can be burned for the regeneration of the filter body, the housing being divided and in the open state giving access to the exchangeably arranged filter body.
  • Foot filters of this type are used, for example, for cleaning the exhaust gas of non-stationary diesel engines.
  • the soot filter for example of a forklift equipped in this way, separates the soot particles contained in the exhaust gas during day-to-day operation.
  • the combustion chamber is brought to a temperature by heating at which the soot particles ignite and burn - with simultaneous access to combustion air; the ignition temperature of the soot particles is generally reduced catalytically.
  • the filter bodies in general a soot filter has a plurality of filter bodies connected in parallel
  • the filter bodies are held next to one another in such a way that the interior of the housing fits into one Combustion chamber (in which the soot can be burned off) and a collection space for the filtered exhaust gas is divided.
  • a cover that overlaps the filter body on the outflow side and seals it and contains the collecting space can be removed from the rest of the housing after loosening screws or other closures, so that the filter body is accessible for inspection and, if necessary, for replacement.
  • This design of the housing and arrangement of the filter body has both constructional and technical disadvantages. Since the housing can only be opened on the outflow side, the combustion chamber is practically inaccessible for collecting and burning off the separated soot. Furthermore, the connections of the remaining exhaust system must always be disconnected when the housing is to be opened.
  • soot filter of the type discussed here requires regular regeneration phases during which no exhaust gas can be passed through and the internal combustion engine must therefore be stopped. This in turn means that the system equipped with it, such as the forklift already mentioned, is at a break from work. If you wanted to operate the forklift continuously, you would either have to replace the entire filter (which is practically impossible due to the high assembly costs) or provide two filter systems that can be operated or regenerated in parallel; if the latter during operation the entire system is to take place, new difficulties would have to be eliminated or accepted.
  • the invention is therefore based on the object of designing the structure of the soot filter in such a way that not only easy access to the filter bodies, but also their rapid replacement is ensured and, moreover, the soot filter cannot be stopped for the entire duration of its regeneration phase.
  • the invention provides that the combustion chamber is designed as a combustion chamber separate from the housing and this is combined with the filter body to form a structural unit which is detachably held in the housing.
  • the inventive combination of the filter body with a - separate from the rest of the housing - combustion chamber for the combustion chamber brings with it a number of structural and operational advantages.
  • the use of thermally high-strength (and therefore more expensive) materials can be restricted to the wall of the combustion chamber, while the rest of the housing consists of cheaper material.
  • the unit consisting of the combustion chamber and filter bodies — with the soot accumulated during a work cycle — can be easily removed from the housing and replaced by another similar unit; With the new or regenerated insert, the internal combustion engine can continue to be operated immediately, while the soot-laden unit is regenerated elsewhere, for example in a stationary filter housing similar structure.
  • An end wall of the housing can advantageously be designed as a lid of a box, the lid supporting the structural unit and being detachably and gas-tightly attached to the box.
  • the latter can be accomplished not only with screws, but also, for example, with the help of a quick-release fastener.
  • the arrangement is preferably such that the cover clamps the assembly between itself and the opposite end wall of the housing, a heat-insulating and sealing plate being arranged between the cover on the one hand and the box and the assembly on the other.
  • the combustion chamber (with the holder for the filter body) is a completely independent component, which is particularly advantageous in terms of material selection, manufacture and maintenance (replacement).
  • the assembly work during maintenance or repair or the replacement of the entire assembly described above is further reduced if the inlet and outlet connections are arranged in the end wall of the box opposite the cover and a seal is provided between the inlet connection and an inlet opening of the combustion chamber.
  • the arrangement is preferably such that the inlet opening of the combustion chamber is surrounded on the outside by a piece of pipe which, in the installed state, projects concentrically into the inlet connection piece, which carries an annular seal which lies against the outside of the pipe piece.
  • the regeneration of the filter body requires a special heating of the combustion chamber and thus the filter body so that the soot particles burn when combustion air is admitted. That warming and the heat of combustion lead to an expansion of the gas, and the resulting outflow draws combustion air.
  • the regeneration of the filter specifically the structural unit consisting of the combustion chamber and filter bodies, is not carried out within the housing, the conventional arrangement of a heating device and an inlet for the combustion air is not necessarily required. Rather, for example, the exhaust gas inlet opening of the combustion chamber, which is exposed after the assembly has been removed from the housing, could be used to heat its interior (for example by inserting a heating device) and to supply combustion air.
  • a heating device projecting into the combustion chamber is provided, this is preferably attached to the cover and projects into the combustion chamber.
  • the carrier for the heating device can also contain an (usually controllable) inlet for the combustion air.
  • the housing designated in FIG. 1 as a whole consists of a box 2 and a cover 3 closing its end face.
  • the latter has a circumferential flange 4, which in the example is screwed to a corresponding counter flange 5 of the box 2 (screws 6).
  • screws 6 instead of the numerous screws 6, which are only indicated in FIG. 2, a quick-action lock (not shown) can also be provided.
  • a seal 7 is arranged between the cover 3 and the box 2, which, in the closed state of the housing 1, seals its interior in a gas-tight manner
  • Both the box 2 and the lid 3 have an inner wall 8 and an outer wall 9, between which a layer 10 of heat-insulating material is arranged.
  • Claws 1a are used to fasten the housing 1, for example on the framework of a forklift.
  • a combustion chamber 11 is fastened, with one end edge of its circumferential, multi-cranked side wall 12.
  • An end wall 13 of the combustion chamber 11 is fastened to the other end edge of the side wall 12 and thereby closed, also with respect to the rest of the interior of the housing 1.
  • the walls 12, 13 consist, for example, of V2A steel, while the outer and inner walls 8, 9 of the housing 1 can consist of less heat-resistant material, for example steel St37; only the inner wall 8 of the cover 3 would be excluded - at least in the area of the combustion chamber 11.
  • Filter bodies 14 are inserted in a gas-tight manner in the upper section 12a of the wall 12 of the combustion chamber 11, so that the exhaust gas flowing through the filter has to flow through the filter bodies, which are designed in the manner of lamellae. Outside the combustion chamber 11, the filter body 14 surrounds a collecting space 15 for the exhaust gas freed from soot particles.
  • an inlet connection 17 and an outlet connection 18 for the exhaust gas are fastened, in each case only welded to the inner wall 8, while an annular gap 19 is open towards the outer wall 9, one Prevents thermal bridge from the inner wall 8 via the connector 17 or 18 to the outer wall 9.
  • the annular gap 19 can be closed by a poorly heat-conducting ring (not shown).
  • the inlet connector 17 has an annular body 20, stepped on the outside and inside, with an annular recess 21, in the area of which an annular seal 22 is arranged.
  • a tube piece 23 is inserted into the recess 21, which surrounds the inlet opening 24 of the combustion chamber 11 and is fastened in the end wall 13 thereof. With its outside, the pipe section 23 bears against the seal 22, so that a gas-tight connection between the exhaust gas inlet connection 17 and the combustion chamber in the combustion chamber 11 is established.
  • a support 25 for the heating element 26 of an electrical heating device, designated overall by 27, is fastened coaxially to the inlet connection 17 in an opening in the cover 3.
  • the heating element 26 projects into the interior of the combustion chamber 11 in the manner shown, so that it can be heated in the regeneration phase. In a manner not shown, the current is supplied via the connection part 28 of the heating device 27.
  • heating element 26 extend through the carrier 25, but combustion air, which flows in through a quantity-adjustable inlet 29, can be supplied — essentially concentrically to this.
  • combustion gases generated during the regeneration escape into the atmosphere through the outlet connection 18, just as in filter operation.
  • the combustion chamber 11 ' is not permanently attached to the lid 3. Rather, it also has an end wall 13 ⁇ in the area of the cover, which runs parallel to the opposite end wall 13 'at the other end of the combustion chamber 11'.
  • a (corresponding to the pipe section 23) pipe section 30 is inserted into the end wall 13 ⁇ and engages concentrically in the operating state in the carrier 25 'of the heating element 26'. Between the pipe section 30 and the carrier 25 'seals 31 are provided.
  • a plate 32 made of heat-insulating material is provided, which also seals the cover 3 'against the flange 5.
  • the combustion chamber 11 'with its side wall 12', the end walls 13 'and 13 ⁇ and a bottom 33 is thus a closed, separate and detachably held in the housing 1 component (made of heat-resistant material), in which the filter body - in a known manner in turn releasable , but sealed against their ring holder - are used.

Abstract

In a regenerable soot filter for the exhaust gas of diesel engines, the thermally insulated housing (1) is divided into a box-shaped main part (2) and an end face cover (3'). The combustion chamber for burning the catalytically deposited soot particles has the form of a separate combustion chamber (11') which is separated from the housing (1) and is combined with the filter bodies (14) to form a unit which is held in a detachable manner in the housing (1). <IMAGE>

Description

Die Erfindung betrifft einen regenerierbaren Rußfilter für das Abgas von Verbrennungsmotoren, mit einem Gehäuse, das Ein- und Austrittsstutzen für das Abgas und eine Wärmeisolierung aufweist, mit mindestens einem Filterkörper im Gehäuse und mit einem Brennraum zwischen dem Abgas-Eintrittsstutzen und dem Filter­körper, in welchem abgeschiedene Rußpartikel zwecks Regeneration des Filterkörpers verbrannt werden kön­nen, wobei das Gehäuse geteilt ist und im geöffneten Zustand einen Zugang zum auswechselbar angeordneten Filterkörper freigibt.The invention relates to a regenerable soot filter for the exhaust gas from internal combustion engines, with a housing which has inlet and outlet connections for the exhaust gas and thermal insulation, with at least one filter body in the housing and with a combustion chamber between the exhaust gas inlet connection and the filter body, in which deposited soot particles can be burned for the regeneration of the filter body, the housing being divided and in the open state giving access to the exchangeably arranged filter body.

Derartige Fußfilter werden beispielsweise zur Reini­gung des Abgases nicht-stationärer Dieselmotoren ver­wendet. Der Rußfilter etwa eines in dieser Weise aus­gerüsteten Gabelstaplers scheidet während des arbeits­täglichen Betriebs die im Abgas enthaltenen Rußparti­kel ab. Am Ende der Arbeitszeit wird nach Stillsetzen des Dieselmotors der Brennraum durch Beheizen auf eine Temperatur gebracht, bei der sich die Rußpartikel - unter gleichzeitigem Zutritt von Verbrennungsluft - entzünden und verbrennen; dabei wird in der Regel die Zündtemperatur der Rußpartikel katalytisch herabge­setzt.Foot filters of this type are used, for example, for cleaning the exhaust gas of non-stationary diesel engines. The soot filter, for example of a forklift equipped in this way, separates the soot particles contained in the exhaust gas during day-to-day operation. At the end of the working time, after the diesel engine has been stopped, the combustion chamber is brought to a temperature by heating at which the soot particles ignite and burn - with simultaneous access to combustion air; the ignition temperature of the soot particles is generally reduced catalytically.

Bei dem eingangs geschilderten, beispielsweise aus der DE-A-36 08 371 bekannten Rußfilter dieser Art sind die Filterkörper (im allgemeinen hat ein Rußfilter mehrere parallel geschaltete Filterkörper) nebeneinander der­art gehalten, daß der Innenraum des Gehäuses in einen Brennraum (in dem der Ruß abgebrannt werden kann) und einen Sammelraum für das gefilterte Abgas unterteilt ist. Ein die Filterkörper abströmseitig übergreifender und abgedichtet einspannender sowie den Sammelraum enthaltender Deckel kann nach Lösen von Schrauben oder anderer Verschlüsse vom restlichen Gehäuse abgenommen werden, so daß die Filterkörper zur Inspektion und ggf. zum Austausch zugänglich sind.In the soot filter of this type described at the outset, for example from DE-A-36 08 371, the filter bodies (in general a soot filter has a plurality of filter bodies connected in parallel) are held next to one another in such a way that the interior of the housing fits into one Combustion chamber (in which the soot can be burned off) and a collection space for the filtered exhaust gas is divided. A cover that overlaps the filter body on the outflow side and seals it and contains the collecting space can be removed from the rest of the housing after loosening screws or other closures, so that the filter body is accessible for inspection and, if necessary, for replacement.

Diese Ausbildung des Gehäuses und Anordnung der Fil­terkörper hat sowohl konstruktive als auch vertriebs­technische Nachteile. Da das Gehäuse (nur) abström­seitig geöffnet werden kann, ist der Brennraum für das Sammeln und Abbrennen des abgeschiedenen Rußes prak­tisch unzugänglich. Ferner müssen stets auch die An­schlüsse des übrigen Abgassystems gelöst werden, wenn das Gehäuse geöffnet werden soll.This design of the housing and arrangement of the filter body has both constructional and technical disadvantages. Since the housing can only be opened on the outflow side, the combustion chamber is practically inaccessible for collecting and burning off the separated soot. Furthermore, the connections of the remaining exhaust system must always be disconnected when the housing is to be opened.

Schon deshalb, aber auch wegen konstruktiver Unmög­lichkeit, ist ein schneller Austausch der von der Regenerierung betroffenen Komponenten des gesamten Rußfilters, nämlich des Brennraums und der Filter­körper, ausgeschlossen. Dabei ist zu berücksichtigen, daß ein Rußfilter der hier behandelten Art regelmäßige Regenerationsphasen erfordert, während derer kein Abgas hindurchgeleitet werden kann und daher der Ver­brennungsmotor stillgesetzt werden muß. Dies wiederum bedeutet eine Arbeitspause der damit ausgerüsteten Anlage, etwa des schon erwähnten Gabelstaplers. Wollte man den Gabelstapler kontinuierlich betreiben, so müßte man entweder die gesamten Filter auswechseln (was wegen des hohen Montageaufwandes praktisch ausscheidet) oder zwei Filteranlagen vorsehen, die parallel betreibbar bzw. regenerierbar sind; wenn letzteres beim Betrieb der Gesamtanlage erfolgen soll, müßten neuerliche Schwierigkeiten beseitigt oder in Kauf genommen werden.For this reason alone, but also because of the structural impossibility, rapid replacement of the components of the entire soot filter affected by the regeneration, namely the combustion chamber and the filter body, is impossible. It should be taken into account that a soot filter of the type discussed here requires regular regeneration phases during which no exhaust gas can be passed through and the internal combustion engine must therefore be stopped. This in turn means that the system equipped with it, such as the forklift already mentioned, is at a break from work. If you wanted to operate the forklift continuously, you would either have to replace the entire filter (which is practically impossible due to the high assembly costs) or provide two filter systems that can be operated or regenerated in parallel; if the latter during operation the entire system is to take place, new difficulties would have to be eliminated or accepted.

Der Erfindung liegt daher die Aufgabe zugrunde, den Aufbau des Rußfilters so zu gestalten, daß nicht nur ein einfacher Zugang zu den Filterkörpern, sondern auch deren rascher Wechsel gewährleistet ist und überdies auf das Stillsetzen des Rußfilters während der gesamten Dauer seiner Regenerationsphase verzichtet werden kann. Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß der Brennraum als vom Gehäuse getrennte Brennkammer ausgebildet und diese mit dem Filterkörper zu einer Baueinheit zusammengefaßt ist, welche lösbar im Gehäuse gehalten ist.The invention is therefore based on the object of designing the structure of the soot filter in such a way that not only easy access to the filter bodies, but also their rapid replacement is ensured and, moreover, the soot filter cannot be stopped for the entire duration of its regeneration phase. To achieve this object, the invention provides that the combustion chamber is designed as a combustion chamber separate from the housing and this is combined with the filter body to form a structural unit which is detachably held in the housing.

Die erfindungsgemäße Zusammenfassung der Filterkörper mit einer - vom übrigen Gehäuse getrennten - Brenn­kammer für den Brennraum bringt eine Reihe baulicher und betrieblicher Vorteile mit sich. So kann apparativ der Einsatz thermisch hochfester (und damit teurer) Werkstoffe auf die Wandung der Brennkammer beschränkt bleiben, während das übrige Gehäuse aus billigerem Material besteht. Ferner läßt sich die Einheit aus Brennkammer und Filterkörpern - mit dem während eines Arbeitszyklus' angesammelten Ruß - leicht aus dem Ge­häuse herausnehmen und durch eine andere gleichartige Einheit ersetzen; mit dem neuen bzw. regenerierten Einsatz kann der Verbrennungsmotor sofort weiterbe­trieben werden, während die mit Ruß beladene Baueinheit an anderer Stelle, beispielsweise in einem stationär betriebenen Filtergehäuse ähnlichen Aufbaus regeneriert wird.The inventive combination of the filter body with a - separate from the rest of the housing - combustion chamber for the combustion chamber brings with it a number of structural and operational advantages. In terms of equipment, the use of thermally high-strength (and therefore more expensive) materials can be restricted to the wall of the combustion chamber, while the rest of the housing consists of cheaper material. Furthermore, the unit consisting of the combustion chamber and filter bodies — with the soot accumulated during a work cycle — can be easily removed from the housing and replaced by another similar unit; With the new or regenerated insert, the internal combustion engine can continue to be operated immediately, while the soot-laden unit is regenerated elsewhere, for example in a stationary filter housing similar structure.

Vorteilhaft kann eine Stirnwand des Gehäuses als Deckel eines Kastens ausgebildet sein, wobei der Deckel die Baueinheit trägt sowie am Kasten lösbar und gasdicht befestigt ist. Letzteres läßt sich nicht nur mit Schrauben, sondern zum Beispiel auch mit Hilfe eines Schnellspannverschlusses bewerkstelligen.An end wall of the housing can advantageously be designed as a lid of a box, the lid supporting the structural unit and being detachably and gas-tightly attached to the box. The latter can be accomplished not only with screws, but also, for example, with the help of a quick-release fastener.

Vorzugsweise ist jedoch die Anordnung so getroffen, daß der Deckel die Baueinheit zwischen sich und der gegen­überliegenden Stirnwand des Gehäuses einspannt, wobei zwischen dem Deckel einerseits und dem Kasten sowie der Baueinheit andererseits eine wärmeisolierende und ab­dichtende Platte angeordnet ist. Dann ist die Brennkam­mer (mit der Halterung für die Filterkörper) ein voll­ständig unabhängiges Bauteil, was hinsichtlich Werk­stoffauswahl, Herstellung und Wartung (Austausch) be­sonders vorteilhaft ist.However, the arrangement is preferably such that the cover clamps the assembly between itself and the opposite end wall of the housing, a heat-insulating and sealing plate being arranged between the cover on the one hand and the box and the assembly on the other. Then the combustion chamber (with the holder for the filter body) is a completely independent component, which is particularly advantageous in terms of material selection, manufacture and maintenance (replacement).

Die Montagearbeit bei der Wartung oder Reparatur bzw. der vorstehend beschriebenen Auswechslung der ganzen Baueinheit wird weiter vermindert, wenn die Ein- und Austrittsstutzen in der dem Deckel gegenüberliegenden Stirnwand des Kastens angeordnet sind und zwischen dem Eintrittsstutzen und einer Einlaßöffnung der Brennkam­mer eine Dichtung vorgesehen ist. Dabei ist die Anord­nung vorzugsweise so getroffen, daß die Einlaßöffnung der Brennkammer außenseitig von einem Rohrstück umgeben ist, welches im Einbauzustand konzentrisch in den Ein­trittsstutzen ragt, welcher eine außen am Rohrstück anliegende Ringdichtung trägt. Beim Öffnen des Deckels und Herausziehen der Baueinheit aus dem Gehäuse wird dann nicht nur die Dichtung zwischen dem Deckel und dem Kasten gelöst, sondern auch die dichtende Verbindung zwischen dem Eintrittsstutzen und dem Brennraum im Innern der Brennkammer geöffnet. Umgekehrt wird beim Einsetzen einer anderen oder der regenerierten Bauein­heit die dichtende Verbindung zwischen dem Innenraum der Brennkammer und dem Eintrittsstutzen für das Abgas automatisch wiederhergestellt.The assembly work during maintenance or repair or the replacement of the entire assembly described above is further reduced if the inlet and outlet connections are arranged in the end wall of the box opposite the cover and a seal is provided between the inlet connection and an inlet opening of the combustion chamber. The arrangement is preferably such that the inlet opening of the combustion chamber is surrounded on the outside by a piece of pipe which, in the installed state, projects concentrically into the inlet connection piece, which carries an annular seal which lies against the outside of the pipe piece. When opening the cover and pulling the assembly out of the housing, not only is the seal between the cover and the box released, but also the sealing connection between the inlet connector and the combustion chamber in the Opened inside the combustion chamber. Conversely, when another or the regenerated unit is inserted, the sealing connection between the interior of the combustion chamber and the inlet connector for the exhaust gas is automatically restored.

Die Regenerierung der Filterkörper erfordert eine be­sondere Aufheizung des Brennraumes und damit der Fil­terkörper, damit unter Zutritt von Verbrennungsluft die Rußpartikel verbrennen. Jene Erwärmung und die Ver­brennungswärme führen zu einer Ausdehnung des Gases, und die dadurch einsetzende Abströmung zieht Verbren­nungsluft nach. Sofern die Regenerierung des Filters, und zwar spezifisch der Baueinheit aus Brennkammer und Filterkörpern nicht innerhalb des Gehäuses vorgenommen wird, bedarf es nicht notwendigerweise der herkömmli­chen Anordnung einer Heizeinrichtung und eines Einlasses für die Verbrennungsluft. Vielmehr könnte beispielsweise die - nach Entnahme der Baueinheit aus dem Gehäuse frei­liegende - Abgas-Eintrittsöffnung der Brennkammer zur Erwärmung ihres Innenraums (etwa durch Einführen einer Heizvorrichtung) und zum Zuführen von Verbrennungsluft genutzt werden.The regeneration of the filter body requires a special heating of the combustion chamber and thus the filter body so that the soot particles burn when combustion air is admitted. That warming and the heat of combustion lead to an expansion of the gas, and the resulting outflow draws combustion air. If the regeneration of the filter, specifically the structural unit consisting of the combustion chamber and filter bodies, is not carried out within the housing, the conventional arrangement of a heating device and an inlet for the combustion air is not necessarily required. Rather, for example, the exhaust gas inlet opening of the combustion chamber, which is exposed after the assembly has been removed from the housing, could be used to heat its interior (for example by inserting a heating device) and to supply combustion air.

Soweit aber - in bekannter Weise; vgl. z.B. EP-A-151 558 und US-A-4 641 496 - eine in den Brennraum ragende Heiz­vorrichtung vorgesehen ist, ist diese vorzugsweise am Deckel befestigt und ragt in die Brennkammer. Dann kann der Träger für die Heizvorrichtung auch einen (üblicher­weise regelbaren) Einlaß für die Verbrennungsluft ent­halten.So far - in a known manner; see. e.g. EP-A-151 558 and US-A-4 641 496 - a heating device projecting into the combustion chamber is provided, this is preferably attached to the cover and projects into the combustion chamber. Then the carrier for the heating device can also contain an (usually controllable) inlet for the combustion air.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand anderer Unteransprüche.Other advantageous embodiments of the invention are the subject of other dependent claims.

Die Zeichnung veranschaulicht zwei Ausführungsbeispiele der Erfindung, darin zeigt:

  • Fig. 1 einen vertikalen Längsschnitt gemäß der Linie I-I in Figur 2;
  • Fig. 2 teils eine Stirnansicht von rechts in Fig. 1, teils einen Vertikalschnitt gemäß der Linie II-II in Fig. 1;
  • Fig. 3 eine der Fig. 1 entsprechende Darstellung eines weiteren Ausführungsbeispiels; und
  • Fig. 4 eine teilweise Stirnansicht in Richtung des Pfeiles A in Fig. 3.
The drawing illustrates two exemplary embodiments of the invention, in which:
  • Figure 1 is a vertical longitudinal section along the line II in Figure 2.
  • Fig. 2 partly an end view from the right in Fig. 1, partly a vertical section along the line II-II in Fig. 1;
  • 3 shows a representation corresponding to FIG. 1 of a further exemplary embodiment; and
  • 4 shows a partial end view in the direction of arrow A in FIG. 3.

Das in Fig. 1 im ganzen mit 1 bezeichnete Gehäuse besteht aus einem Kasten 2 und einem dessen eine Stirn­seite verschließenden Deckel 3. Letzterer hat einen umlaufenden Flansch 4, der im Beispiel mit einem ent­sprechenden Gegenflansch 5 des Kastens 2 verschraubt ist (Schrauben 6). Statt der zahlreichen, in Fig. 2 nur angedeuteten Schrauben 6 kann auch ein - nicht darge­stellter Schnellspannverschluß vorgesehen sein. In jedem Falle ist zwischen dem Deckel 3 und dem Kasten 2 eine Dichtung 7 angeordnet, welche im geschlossenen Zustand des Gehäuses 1 dessen Innenraum insoweit gasdicht abschließtThe housing designated in FIG. 1 as a whole consists of a box 2 and a cover 3 closing its end face. The latter has a circumferential flange 4, which in the example is screwed to a corresponding counter flange 5 of the box 2 (screws 6). Instead of the numerous screws 6, which are only indicated in FIG. 2, a quick-action lock (not shown) can also be provided. In any case, a seal 7 is arranged between the cover 3 and the box 2, which, in the closed state of the housing 1, seals its interior in a gas-tight manner

Sowohl der Kasten 2 als auch der Deckel 3 haben eine Innenwand 8 und eine Außenwand 9, zwischen denen eine Schicht 10 aus wärmeisolierendem Material angeordnet ist. Pratzen 1a dienen zur Befestigung des Gehäuses 1, beispielsweise am Rahmenwerk eines Gabelstaplers.Both the box 2 and the lid 3 have an inner wall 8 and an outer wall 9, between which a layer 10 of heat-insulating material is arranged. Claws 1a are used to fasten the housing 1, for example on the framework of a forklift.

Am Deckel 3, nämlich dessen Innenwand 8, ist eine Brenn­kammer 11 befestigt, und zwar mit der einen Stirnkante ihrer umlaufenden, mehrfach abgekröpften Seitenwandung 12. An der anderen Stirnkante der Seitenwandung 12 ist eine Stirnwandung 13 der Brennkammer 11 befestigt und diese dadurch abgeschlossen, auch gegenüber dem übrigen Innenraum des Gehäuses 1. Die Wandungen 12, 13 bestehen beispielsweise aus V2A-Stahl, während die Außen- und Innenwände 8, 9 des Gehäuses 1 aus weniger hitzebestän­digem Material, beispielsweise Stahl St37, bestehen können; lediglich die Innenwand 8 des Deckels 3 wäre - jedenfalls im Bereich der Brennkammer 11 - davon auszunehmen.On the cover 3, namely its inner wall 8, a combustion chamber 11 is fastened, with one end edge of its circumferential, multi-cranked side wall 12. An end wall 13 of the combustion chamber 11 is fastened to the other end edge of the side wall 12 and thereby closed, also with respect to the rest of the interior of the housing 1. The walls 12, 13 consist, for example, of V2A steel, while the outer and inner walls 8, 9 of the housing 1 can consist of less heat-resistant material, for example steel St37; only the inner wall 8 of the cover 3 would be excluded - at least in the area of the combustion chamber 11.

In den oberen Abschnitt 12a der Wandung 12 der Brennkam­mer 11 sind Filterkörper 14 gasdicht eingesetzt, so daß das den Filter durchströmende Abgas die in bekannter Weise lamellenartig ausgebildeten Filterkörper durch­strömen muß. Außerhalb der Brennkammer 11 umgibt die Filterkörper 14 ein Sammelraum 15 für das von Rußparti­keln befreite Abgas.Filter bodies 14 are inserted in a gas-tight manner in the upper section 12a of the wall 12 of the combustion chamber 11, so that the exhaust gas flowing through the filter has to flow through the filter bodies, which are designed in the manner of lamellae. Outside the combustion chamber 11, the filter body 14 surrounds a collecting space 15 for the exhaust gas freed from soot particles.

In der dem Deckel 3 des Gehäuses 1 gegenüberliegenden Stirnwand 16 des Kastens 2 sind ein Eintrittsstutzen 17 und ein Austrittsstutzen 18 für das Abgas befestigt, und zwar jeweils nur mit der Innenwand 8 verschweißt, wäh­rend gegenüber der Außenwand 9 ein Ringspalt 19 offen ist, der eine Wärmebrücke von der Innenwand 8 über den Stutzen 17 oder 18 zur Außenwand 9 verhindert. Der Ring­spalt 19 kann - um das Eindringen von Regen oder anderen Flüssigkeiten (auch Farbe) in die Schicht 10 zu ver­meiden - durch einen schlecht wärmeleitenden Ring ge­schlossen werden (nicht dargestellt).In the front wall 16 of the box 2 opposite the cover 3 of the housing 1, an inlet connection 17 and an outlet connection 18 for the exhaust gas are fastened, in each case only welded to the inner wall 8, while an annular gap 19 is open towards the outer wall 9, one Prevents thermal bridge from the inner wall 8 via the connector 17 or 18 to the outer wall 9. In order to prevent rain or other liquids (including paint) from penetrating into the layer 10, the annular gap 19 can be closed by a poorly heat-conducting ring (not shown).

Während der Austrittsstutzen 18 aus einem einfachen Rohrstück besteht, hat der Eintrittsstutzen 17 einen außen- wie innenseitig gestuften Ringkörper 20 mit einer ringförmigen Ausnehmung 21, in deren Bereich eine Ring­dichtung 22 angeordnet ist. In die Ausnehmung 21 ist - in dem in Fig. 1 dargestellten Betriebszustand - ein Rohrstück 23 eingeschoben, welches die Eintrittsöffnung 24 der Brennkammer 11 umgibt und in deren Stirnwandung 13 befestigt ist. Mit seiner Außenseite liegt das Rohr­stück 23 an der Dichtung 22 an, so daß eine gasdichte Verbindung zwischen dem Abgas-Eintrittsstutzen 17 und dem Brennraum in der Brennkammer 11 hergestellt ist.While the outlet connector 18 consists of a simple piece of pipe, the inlet connector 17 has an annular body 20, stepped on the outside and inside, with an annular recess 21, in the area of which an annular seal 22 is arranged. In the operating state shown in FIG. 1, a tube piece 23 is inserted into the recess 21, which surrounds the inlet opening 24 of the combustion chamber 11 and is fastened in the end wall 13 thereof. With its outside, the pipe section 23 bears against the seal 22, so that a gas-tight connection between the exhaust gas inlet connection 17 and the combustion chamber in the combustion chamber 11 is established.

Koaxial zum Eintrittsstutzen 17 ist in einem Durchbruch des Deckels 3 ein Träger 25 für das Heizelement 26 einer im ganzen mit 27 bezeichneten elektrischen Heizvorrich­tung befestigt. Das Heizelement 26 ragt in der darge­stellten Weise in den Innenraum der Brennkammer 11, so daß dieser in der Regenerationsphase erhitzt werden kann. In nicht dargestellter Weise erfolgt die Stromzufuhr über den Anschlußteil 28 der Heizvorrichtung 27.A support 25 for the heating element 26 of an electrical heating device, designated overall by 27, is fastened coaxially to the inlet connection 17 in an opening in the cover 3. The heating element 26 projects into the interior of the combustion chamber 11 in the manner shown, so that it can be heated in the regeneration phase. In a manner not shown, the current is supplied via the connection part 28 of the heating device 27.

Durch den Träger 25 erstreckt sich nicht nur das Heizele­ment 26, sondern es kann - im wesentlichen konzentrisch zu diesem - Verbrennungsluft zugeführt werden, welche durch einen mengenregelbaren Einlaß 29 einströmt. Die bei der Regeneration entstehenden Verbrennungsgase entweichen ebenso wie im Filterbetrieb das Abgas durch den Austritts­stutzen 18 in die Atmosphäre.Not only does the heating element 26 extend through the carrier 25, but combustion air, which flows in through a quantity-adjustable inlet 29, can be supplied — essentially concentrically to this. The combustion gases generated during the regeneration escape into the atmosphere through the outlet connection 18, just as in filter operation.

Beim Ausführungsbeispiel der Fig. 3 ist die Brennkammer 11′ nicht dauerhaft am Deckel 3 befestigt. Vielmehr hat sie auch im Bereich des Deckels eine Stirnwandung 13˝, welche parallel zur gegenüberliegenden Stirnwandung 13′ am anderen Ende der Brennkammer 11′ verläuft. Ein (dem Rohr­stück 23 entsprechendes) Rohrstück 30 ist in die Stirn­wandung 13˝ eingesetzt und greift im Betriebszustand konzentrisch in den Träger 25′ des Heizelements 26′ ein. Zwischen dem Rohrstück 30 und dem Träger 25′ sind Dich­tungen 31 vorgesehen.3, the combustion chamber 11 'is not permanently attached to the lid 3. Rather, it also has an end wall 13˝ in the area of the cover, which runs parallel to the opposite end wall 13 'at the other end of the combustion chamber 11'. A (corresponding to the pipe section 23) pipe section 30 is inserted into the end wall 13˝ and engages concentrically in the operating state in the carrier 25 'of the heating element 26'. Between the pipe section 30 and the carrier 25 'seals 31 are provided.

Zwischen dem Deckel 3′ und einerseits dem Flansch 5 des Kastens 2, andererseits der Stirnwandung 13˝ der Brenn­kammer 11′ ist eine Platte 32 aus wärmedämmendem Material vorgesehen, die zugleich den Deckel 3′ gegenüber dem Flansch 5 abdichtet.Between the cover 3 'and on the one hand the flange 5 of the box 2, on the other hand the end wall 13˝ of the combustion chamber 11', a plate 32 made of heat-insulating material is provided, which also seals the cover 3 'against the flange 5.

Die Brennkammer 11′ mit ihrer Seitenwandung 12′, den Stirnwandungen 13′ und 13˝ sowie einem Boden 33 ist also ein geschlossenes, separates und lösbar im Gehäuse 1 ge­haltenes Bauteil (aus hitzefestem Werkstoff), in das die Filterkörper - in bekannter Weise wiederum lösbar, aber gegenüber ihrer Ringhalterung abgedichtet - eingesetzt sind.The combustion chamber 11 'with its side wall 12', the end walls 13 'and 13˝ and a bottom 33 is thus a closed, separate and detachably held in the housing 1 component (made of heat-resistant material), in which the filter body - in a known manner in turn releasable , but sealed against their ring holder - are used.

Mit 34 ist in den Fig. 3 und 4 ein Handgriff am Deckel 3′ bezeichnet. 3 and 4, a handle on the cover 3 'is designated by 34 .

Claims (10)

1. Regenerierbarer Rußfilter für das Abgas von Verbrennungsmotoren,
mit einem Gehäuse (1), das Ein- und Austrittsstutzen (17,18) für das Abgas und eine Wärmeisolierung (10) aufweist,
mit mindestens einem Filterkörper (14) im Gehäuse (1) und
mit einem Brennraum zwischen dem Abgas-Eintritts­stutzen (17) und dem Filterkörper (14), in welchem abgeschiedene Rußpartikel zwecks Regeneration des Filterkörpers (14) verbrannt werden können, wobei das Gehäuse (1) geteilt ist und im geöffneten Zustand einen Zugang zum auswechselbar angeordneten Filterkörper (14) freigibt, dadurch gekennzeichnet, daß der Brennraum als vom Gehäuse (1) getrennte Brennkammer (11) ausgebildet und diese mit dem Fil­terkörper (14) zu einer Baueinheit zusammengefaßt ist, welche lösbar im Gehäuse (1) gehalten ist.1. Regenerable soot filter for the exhaust gas from internal combustion engines,
with a housing (1) which has inlet and outlet connections (17, 18) for the exhaust gas and thermal insulation (10),
with at least one filter body (14) in the housing (1) and
with a combustion chamber between the exhaust gas inlet connection (17) and the filter body (14), in which separated soot particles can be burned for the regeneration of the filter body (14), wherein the housing (1) is divided and, in the open state, gives access to the exchangeably arranged filter body (14), characterized in that the combustion chamber is designed as a combustion chamber (11) separate from the housing (1) and this with the filter body (14) a unit is summarized, which is detachably held in the housing (1). 2. Rußfilter nach Anspruch 1, dadurch gekennzeichnet, daß eine Stirnwand des Gehäuses (1) als Deckel (3) eines Kastens (2) ausgebildet ist, und daß der Deckel (3) die Baueinheit (11, 14) trägt sowie am Kasten (2) lösbar und gasdicht (Dichtung 7) befestigt ist.2. Soot filter according to claim 1, characterized in that an end wall of the housing (1) is designed as a lid (3) of a box (2), and that the lid (3) carries the structural unit (11, 14) and on the box ( 2) is detachable and gas-tight (seal 7). 3. Rußfilter nach Anspruch 1, dadurch gekennzeichnet, daß eine Stirnwand des Gehäuses (1) als Deckel (3′) eines Kastens (2) ausgebildet ist, und daß der Deckel (3′) die Baueinheit (11′,14) zwischen sich und der gegenüberliegenden Stirnwand des Gehäuses einspannt, wobei zwischen dem Deckel einerseits und dem Kasten sowie der Baueinheit andererseits eine wärmeisolie­rende und abdichtende Platte (32) angeordnet ist.3. soot filter according to claim 1, characterized in that an end wall of the housing (1) as a cover (3 ') of a box (2) is formed, and that the cover (3'), the assembly (11 ', 14) between them and clamps the opposite end wall of the housing, a heat-insulating and sealing plate (32) being arranged between the cover on the one hand and the box and the structural unit on the other. 4. Rußfilter nach Anspruch 2 oder 3, dadurch gekenn­zeichnet, daß der Filterkörper (14) in einer sich im wesentlichen senkrecht zum Deckel (3) erstreckenden Wandung (12a) der Brennkammer (11) befestigt ist.4. soot filter according to claim 2 or 3, characterized in that the filter body (14) in a substantially perpendicular to the cover (3) extending wall (12 a) of the combustion chamber (11) is attached. 5. Rußfilter nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß die Ein- und Austritts­stutzen (17, 18) in der dem Deckel (3) gegenüberlie­genden Stirnwand (16) des Kastens (2) angeordnet sind, und daß zwischen dem Eintrittsstutzen (17) und einer Einlaßöffnung (24) der Brennkammer (11) eine Dichtung (22) vorgesehen ist.5. soot filter according to one of claims 2 to 4, characterized in that the inlet and outlet ports (17, 18) in the cover (3) opposite end wall (16) of the box (2) are arranged, and that between the inlet port (17) and an inlet opening (24) of the combustion chamber (11) a seal (22) is provided. 6. Rußfilter nach Anspruch 5, dadurch gekennzeichnet, daß die Einlaßöffnung (24) außenseitig von einem Rohr­stück (23) umgeben ist, welches im Einbauzustand kon­zentrisch in den Eintrittsstutzen (17) ragt, der eine außen am Rohrstück (23) anliegende Ringdichtung (22) trägt.6. A soot filter according to claim 5, characterized in that the inlet opening (24) is surrounded on the outside by a pipe section (23) which, in the installed state, projects concentrically into the inlet connection piece (17), which has an outer ring seal (22) on the pipe section (23) ) wearing. 7. Rußfilter nach einem der Ansprüche 2 bis 6 mit einer in den Brennraum ragenden Heizvorrichtung, dadurch gekennzeichnet, daß die Heizvorrichtung (27) am Deckel (3) befestigt ist und ihr Heizelement (26) in die Brennkammer (11) ragt.7. Soot filter according to one of claims 2 to 6 with a heating device projecting into the combustion chamber, characterized in that the heating device (27) is fastened to the cover (3) and its heating element (26) projects into the combustion chamber (11). 8. Rußfilter nach Anspruch 3 und 7, dadurch gekenn­zeichnet, daß die Heizvorrichtung (27) an einem Rohr­stutzen (25′) befestigt ist, der außenseitig am Deckel (3′) eine Durchlaßöffnung für das Heizelement (26) umgibt, und in den konzentrisch und abgedichtet ein an der Brennkammer (11′) angeschweißtes, dessen Durchlaß­öffnung für das Heizelement (26) umgebendes Rohrstück (30) lösbar eingreift.8. soot filter according to claim 3 and 7, characterized in that the heating device (27) on a pipe socket (25 ') is attached, the outside of the cover (3') surrounds a passage opening for the heating element (26), and in the concentric and sealed a welded to the combustion chamber (11 '), the passage opening for the heating element (26) surrounding pipe section (30) releasably engages. 9. Rußfilter nach Anspruch 7 oder 8, dadurch gekenn­zeichnet, daß an einem Träger (25) für die Heizvorrich­tung (27) ein insbesondere regelbarer Einlaß (29) für Verbrennungsluft vorgesehen ist.9. A soot filter according to claim 7 or 8, characterized in that a particularly adjustable inlet (29) for combustion air is provided on a carrier (25) for the heating device (27). 10. Rußfilter nach mindestens einem der voraufgehenden Ansprüche, dadurch gekennzeichnet, daß mindestens der Kasten (2) des Gehäuses (1) doppelwandig ausgebildet und zwischen Innen- und Außenwand (8, 9) eine Schicht (10) aus Wärme-Isoliermaterial angeordnet ist, und daß der Ein- und Austrittsstutzen (17, 18) sowie ggf. der Träger (25) für die Heizvorrichtung (27) nur an der Innenwand (8) befestigt sind, während zwischen ihnen und der Außenwand (9) ein geringer Luftspalt (19) vor­gesehen ist, der durch einen Ring aus schlecht wärme­leitendem Material geschlossen sein kann.10. soot filter according to at least one of the preceding claims, characterized in that at least the box (2) of the housing (1) is double-walled and a layer (10) of heat-insulating material is arranged between the inner and outer wall (8, 9), and that the inlet and outlet ports (17, 18) and possibly the support (25) for the heating device (27) are only attached to the inner wall (8), while a small air gap (19) is provided between them and the outer wall (9) is that can be closed by a ring made of poorly heat-conducting material.
EP88118670A 1988-02-05 1988-11-10 Regenerable soot filter for the exhaust gases of internal-combustion engines Expired - Lifetime EP0326659B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88118670T ATE60824T1 (en) 1988-02-05 1988-11-10 REGENERABLE SOOT FILTER FOR THE EXHAUST FROM COMBUSTION ENGINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8801474U 1988-02-05
DE8801474U DE8801474U1 (en) 1988-02-05 1988-02-05

Publications (2)

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EP0326659A1 true EP0326659A1 (en) 1989-08-09
EP0326659B1 EP0326659B1 (en) 1991-02-06

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Application Number Title Priority Date Filing Date
EP88118670A Expired - Lifetime EP0326659B1 (en) 1988-02-05 1988-11-10 Regenerable soot filter for the exhaust gases of internal-combustion engines

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EP (1) EP0326659B1 (en)
AT (1) ATE60824T1 (en)
DE (2) DE8801474U1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4004636A1 (en) * 1990-02-15 1991-08-22 Kloeckner Humboldt Deutz Ag METHOD AND DEVICE FOR REDUCING THE LOCALITY OF GASES
DE102008031874B4 (en) 2008-07-05 2015-12-17 Man Truck & Bus Ag Exhaust gas purification device for an internal combustion engine of a vehicle, in particular a utility vehicle and arrangement of an exhaust gas purification device

Citations (3)

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Publication number Priority date Publication date Assignee Title
US4087966A (en) * 1973-05-03 1978-05-09 Nippondenso Co., Ltd. Exhaust gas cleaning device
EP0112634A1 (en) * 1982-12-08 1984-07-04 General Motors Corporation Ceramic monolith particulate filter trap support
WO1987007324A1 (en) * 1986-05-30 1987-12-03 Dieter Kuhnert Exhaust gas cleaning system for diesel engines

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Publication number Priority date Publication date Assignee Title
GB2114913B (en) * 1982-02-10 1985-06-05 Texaco Development Corp Exhaust gas treatment apparatus and method
DE3475814D1 (en) * 1983-01-24 1989-02-02 Hitachi Ltd A method and a device for exhaust emission control for diesel engines
SE439949B (en) * 1984-01-10 1985-07-08 Unikat Ab PARTICLE FILTER, FOR CLEANING ENGINE EXHAUST GAS, COMPLETED WITH CATALYSTS
US4641496A (en) * 1984-12-17 1987-02-10 Ford Motor Company Continuous rotary regeneration system for a particulate trap
DE3608371A1 (en) * 1986-03-13 1987-09-17 Fev Forsch Energietech Verbr HOUSING FOR EXHAUST GAS TREATMENT SYSTEMS, ESPECIALLY FOR PARTICLE FILTER SYSTEMS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4087966A (en) * 1973-05-03 1978-05-09 Nippondenso Co., Ltd. Exhaust gas cleaning device
EP0112634A1 (en) * 1982-12-08 1984-07-04 General Motors Corporation Ceramic monolith particulate filter trap support
WO1987007324A1 (en) * 1986-05-30 1987-12-03 Dieter Kuhnert Exhaust gas cleaning system for diesel engines

Also Published As

Publication number Publication date
EP0326659B1 (en) 1991-02-06
ATE60824T1 (en) 1991-02-15
DE3861767D1 (en) 1991-03-14
DE8801474U1 (en) 1989-06-22

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