EP0585752B1 - Exhaust gas purification device for diesel engines - Google Patents

Exhaust gas purification device for diesel engines Download PDF

Info

Publication number
EP0585752B1
EP0585752B1 EP93113329A EP93113329A EP0585752B1 EP 0585752 B1 EP0585752 B1 EP 0585752B1 EP 93113329 A EP93113329 A EP 93113329A EP 93113329 A EP93113329 A EP 93113329A EP 0585752 B1 EP0585752 B1 EP 0585752B1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
filter
burner
hot
diesel engines
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93113329A
Other languages
German (de)
French (fr)
Other versions
EP0585752A1 (en
Inventor
Günter Härtel
Armin Schürfeld
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.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP0585752A1 publication Critical patent/EP0585752A1/en
Application granted granted Critical
Publication of EP0585752B1 publication Critical patent/EP0585752B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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 an exhaust gas cleaning device for diesel internal combustion engines, consisting of a filter device for collecting carbon particles (soot) and a burner device for burning off the particles deposited on the filter.
  • a device of this type is shown and described in US-A 4,571,938.
  • Their burner device consists of a burner nozzle which is connected to an air pump and a fuel pump.
  • the air pump delivers through an air regulating valve, which controls the delivery pressure depending on the exhaust gas pressure in the area of the exhaust pipes in front of the filter device.
  • DE-A-38 08 075 discloses a soot filter device with a burner which heats a partial surface of the filter upstream or downstream of the filter, the filter and burner being movable relative to one another, so that all partial surfaces are successively heated during a cycle. In both cases, this burner must work against the back pressure in front of the filter.
  • EP 100 547 discloses a foot filter device, the filter of which is heated by a burner arranged outside the exhaust pipe, and only its outer peripheral parts. Although there is no need to work against the dynamic pressure in this device, it cannot work effectively since only the peripheral filter parts are heated.
  • the object of the invention is to design a generic exhaust gas purification device in such a way that air blowing independent of the exhaust gas counterpressure can take place during combustion operation, the aim being to reduce the burner output, thereby saving fuel and reducing the installation space and component expenditure.
  • Fig. 1 shows a cross section through an exhaust gas cleaning device, which is supplied via an inlet connector 1, unpurified exhaust gas from a diesel engine (not shown in the drawing).
  • the exhaust gas enters a particle filter 3 via inflow channels 2.
  • This filter is preferably made of porous (gas-permeable) material (metal or ceramic) with relatively good thermal conductivity.
  • the filter body can be produced as a monolith or can be composed of individual parts.
  • the material structure is such that a good compromise between gas permeability and filtering capacity is achieved.
  • the gas permeability is reduced due to the deposition of the particles in the narrow pores, as a result of which an increased exhaust gas back pressure builds up. It is therefore necessary to regenerate the filter.
  • Most of the particles in the diesel exhaust gas are soot, which can be burned by heating the filter to> 600 ° C and thus removed.
  • a certain reserve is provided so that the necessary regeneration of the filter 3 cannot be carried out at intervals, but for reasons of energy saving.
  • the exhaust gas passes from the inflow ducts 2 through the porous filter wall 4 partly directly into outflow ducts 5 and for the rest of the proportion initially into return ducts 6.
  • the particles are retained in the filter wall and the exhaust gas is cleaned of particles.
  • the outflow and return channels 5, 6 are separated from one another by a separating web 7. The position of the separating web 7 allows the return proportion of the amount of exhaust gas to be determined.
  • FIG. 2 shows a longitudinal section through the particle filter 3, the section plane being placed lengthwise through the outflow channels 5 and return channels 6.
  • the exhaust gas passing through the filter wall 4 passes in the area of the outflow channels 5 directly into an outlet connection piece 8 or in the area of the return channels 6 first into the area of a hot gas chamber 9 and from there via the outflow channels 5 also to the outlet connection piece 8.
  • the return of a partial exhaust gas flow is necessary in order to avoid too high a temperature (eg> 800 ° C) at the particle filter on the hot gas chamber side when the burner is operating.
  • the arrangement of the outflow channels 5 and the return channels 6 can also be done in a different way than shown in the drawing. So it can For the purpose of better temperature distribution and / or better mixing of the gas streams, it may be advantageous to divide the return channels 6 into two sectors, in particular if the exhaust gas fraction is selected to be large via the return channels.
  • the hot gas chamber 9 is separated from a combustion chamber 11 by a baffle plate 10.
  • the geometric extension of the baffle plate 10 and openings in the baffle plate, not shown in the drawing, are to be dimensioned such that, on the one hand, the exhaust gas flow from the return channels 6 is kept away from the combustion chamber 11 and, on the other hand, sufficient permeability for the burner exhaust gas from the combustion chamber 11 into the hot gas chamber 9 is given.
  • the design of the baffle plate 10 is to be carried out in such a way that the burner hot gases are mixed as well as possible with the exhaust gas flow from the return channels 6, with the aim that the temperature of the mixed gas being as equal as possible when the gas mixture enters the outflow channels 5 is achieved.
  • the baffle plate 10 can be made of temperature-resistant material (metal, ceramic, 7-8) z. B. in the form of a sheet, a pipe network or a gas-permeable wire mesh.
  • FIG. 3 shows the particle filter 3 with the combustion chamber 11 attached in a longitudinal section rotated by 90 °.
  • the combustion mixture is fed to the combustion chamber 11 from a burner mixing chamber 12 via an opening 13, which in turn is preferably supplied with combustion mixture by an air-based atomizing nozzle 14.
  • the hot gas chamber 9, combustion chamber 11 and the burner mixing chamber 12 form a heating dome, which is arranged downstream of the filter device.
  • a spark plug 15 is arranged in the area of an opening 13.
  • a flame monitor 16 monitors the burner function for safety reasons.
  • Periphery can be dispensed with here because it has nothing to do with the invention with regard to the fuel and air supply including metering, the ignition module and the control electronics.
  • the device is characterized by the following advantages: No significant impact of the exhaust gas back pressure, which varies depending on the filter load and engine speed, on the pressure conditions in the combustion chamber. For this reason, a conventional air pump with a delivery pressure of approx. 100-150 mbar can be used to supply the burner with combustion air and burner operation can be guaranteed in all operating states. This air pump is advantageously designed as a turbomachine.
  • the burner heating energy is only transferred to a partial exhaust gas flow, namely that which passes through the return channels 6.
  • a partial exhaust gas flow namely that which passes through the return channels 6.
  • the regeneration zone runs through the entire particle filter 3, with the exhaust gas increasingly being heated in the inflow channels 2 and the heat released during the combustion of the soot particles being used to heat the rest of the filter body.
  • the proportion of the recirculated exhaust gas flow can be selected so that an exceeding of the permissible maximum temperature can be avoided.
  • the burner system By arranging the burner system in the area of the filtered exhaust gas flow (downstream of the filter wall), the risk of impermissible soot deposits at the outlet of the atomizer nozzle, on the spark plug and the flame monitor is considerably reduced.

Landscapes

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

Description

Die Erfindung betrifft eine Abgasreinigungseinrichtung für Diesel-Brennkraftmaschinen, bestehend aus einer Filtereinrichtung zum Auffangen von Kohlenstoffpartikeln (Ruß) und einer Brennereinrichtung zum Abbrennen der am Filter abgelagerten Partikel.The invention relates to an exhaust gas cleaning device for diesel internal combustion engines, consisting of a filter device for collecting carbon particles (soot) and a burner device for burning off the particles deposited on the filter.

Eine Einrichtung dieser Art ist in der US-A 4,571,938 dargestellt und beschrieben. Deren Brennereinrichtung besteht aus einer Brennerdüse, die an eine Luftpumpe und eine Brennstoffpumpe angeschlossen ist. Die Luftpumpe fördert durch ein Luftregulierventil, das den Förderdruck in Abhängigkeit vom Abgasdruck im Bereich der Abgasrohre vor der Filtereinrichtung steuert.A device of this type is shown and described in US-A 4,571,938. Their burner device consists of a burner nozzle which is connected to an air pump and a fuel pump. The air pump delivers through an air regulating valve, which controls the delivery pressure depending on the exhaust gas pressure in the area of the exhaust pipes in front of the filter device.

In der DE-A-38 08 075 ist eine Rußfiltereinrichtung mit Brenner offenbart, die stromauf oder stromab des Filters eine Teilfläche des Filters erhitzt, wobei Filter und Brenner relativ zueinander bewegbar sind, so daß während eines Zyklus nacheinander alle Teilflächen erhitzt werden. Dieser Brenner muß in beiden Fällen gegen den Staudruck vor dem Filter arbeiten.DE-A-38 08 075 discloses a soot filter device with a burner which heats a partial surface of the filter upstream or downstream of the filter, the filter and burner being movable relative to one another, so that all partial surfaces are successively heated during a cycle. In both cases, this burner must work against the back pressure in front of the filter.

In der EP 100 547 ist eine Fußfiltereinrichtung offenbart, deren Filter von einem außerhalb des Abgasrohres angeordneten Brenner beheizt wird, und zwar nur dessen äußere peripheren Teile. Obwohl bei dieser Einrichtung nicht gegen den Staudruck gearbeitet werden muß, kann sie nicht wirkungsvoll arbeiten, da nur die peripheren Filterteile beheizt werden.EP 100 547 discloses a foot filter device, the filter of which is heated by a burner arranged outside the exhaust pipe, and only its outer peripheral parts. Although there is no need to work against the dynamic pressure in this device, it cannot work effectively since only the peripheral filter parts are heated.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, eine gattungsgemäße Abgasreinigungseinrichtung derart zu gestalten, daß eine vom Abgasgegendruck unabhängige Lufteinblasung bei Brennbetrieb erfolgen kann, wobei eine reduzierte Brennerleistung angestrebt werden soll, wodurch Brennstoffeinsparung erreicht und der Bauraum- und Bauteileaufwand verringert werden kann.Proceeding from this, the object of the invention is to design a generic exhaust gas purification device in such a way that air blowing independent of the exhaust gas counterpressure can take place during combustion operation, the aim being to reduce the burner output, thereby saving fuel and reducing the installation space and component expenditure.

Diese Aufgäbe ist durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst worden. Vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben.This task has been solved by the features specified in the characterizing part of claim 1. Advantageous further developments are specified in the subclaims.

Ein Ausführungsbeispiel der Erfindung ist schematisch in der Zeichnung dargestellt und wird nachfolgend beschrieben.An embodiment of the invention is shown schematically in the drawing and is described below.

Die Zeichnung zeigt:

Fig. 1
einen Querschnitt durch die Einrichtung;
Fig. 2 und 3
Längsschnitte aus Fig. 1.
The drawing shows:
Fig. 1
a cross section through the device;
2 and 3
Longitudinal sections from Fig. 1st

Fig. 1 zeigt einen Querschnitt durch eine Abgasreinigungseinrichtung, welcher über einen Einlaß-Anschlußstutzen 1 ungereinigtes Abgas eines Dieselmotors (zeichnerisch nicht dargestellt) zugeführt wird. Das Abgas tritt über Einströmkanäle 2 in einen Partikelfilter 3 ein. Dieser Filter ist vorzugsweise aus porösem (gasdurchlässigem) Material (Metall oder Keramik) mit relativ guter Wärmeleitfähigkeit hergestellt.Fig. 1 shows a cross section through an exhaust gas cleaning device, which is supplied via an inlet connector 1, unpurified exhaust gas from a diesel engine (not shown in the drawing). The exhaust gas enters a particle filter 3 via inflow channels 2. This filter is preferably made of porous (gas-permeable) material (metal or ceramic) with relatively good thermal conductivity.

Der Filterkörper kann als Monolith hergestellt oder aus Einzelteilen zusammengesetzt sein. Die Materialstruktur ist so beschaffen, daß ein guter Kompromiß zwischen Gasdurchlässigkeit und Filtervermögen erreicht wird. Mit zunehmender Beladung des Filters 3 verringert sich durch Ablagerung der Partikel in den engen Poren die Gasdurchlässigkeit, wodurch sich ein erhöhter Abgasgegendruck aufbaut. Es ist deshalb erforderlich den Filter zu regenerieren. Bei den Partikeln im Diesel-Abgas handelt es sich zum weitaus größten Teil um Ruß, der sich durch Aufheizen des Filters auf >600°C verbrennen und damit beseitigen läßt. Bei der Dimensionierung des Filters ist eine bestimmte Reserve vorgesehen, damit die notwendige Regenerierung des Filters 3 nicht kontinuierlich, sondern aus Gründen der Energie-Einsparung in Intervallen erfolgen kann.The filter body can be produced as a monolith or can be composed of individual parts. The material structure is such that a good compromise between gas permeability and filtering capacity is achieved. With increasing loading of the filter 3, the gas permeability is reduced due to the deposition of the particles in the narrow pores, as a result of which an increased exhaust gas back pressure builds up. It is therefore necessary to regenerate the filter. Most of the particles in the diesel exhaust gas are soot, which can be burned by heating the filter to> 600 ° C and thus removed. When dimensioning the filter, a certain reserve is provided so that the necessary regeneration of the filter 3 cannot be carried out at intervals, but for reasons of energy saving.

Das Abgas tritt von den Einströmkanälen 2 durch die poröse Filterwand 4 teilweise direkt in Abströmkanäle 5 und zum restlichen Anteil zunächst in Rückführkanäle 6 über. Dabei werden die Partikel in der Filterwand zurückgehalten und das Abgas von Partikeln gereinigt. Die Abström- und Rückführkanäle 5, 6 sind durch einen Trennsteg 7 voneinander getrennt. Durch die Lage des Trennsteges 7 kann der Rückführungsanteil der Abgasmenge bestimmt werden.The exhaust gas passes from the inflow ducts 2 through the porous filter wall 4 partly directly into outflow ducts 5 and for the rest of the proportion initially into return ducts 6. The particles are retained in the filter wall and the exhaust gas is cleaned of particles. The outflow and return channels 5, 6 are separated from one another by a separating web 7. The position of the separating web 7 allows the return proportion of the amount of exhaust gas to be determined.

Fig. 2 zeigt einen Längsschnitt durch den Partikelfilter 3, wobei die Schnittebene längs durch die Abströmkanäle 5 und Rückführungskanäle 6 gelegt wurde. Das durch die Filterwand 4 tretende Abgas gelangt im Bereich der Abströmkanäle 5 direkt in einen Auslaß-Anschlußstutzen 8 oder im Bereich der Rückführkanäle 6 zunächst in den Bereich einer Heißgaskammer 9 und von dort über die Abströmkanäle 5 ebenfalls zum Auslaß-Anschlußstutzen 8. Die Rückführung eines Teilabgasstromes ist erforderlich, um bei Betrieb des Brenners eine zu hohe Temperatur (z. B. > 800° C) am Partikelfilter auf der Heißgaskammerseite zu vermeiden. Die Anordnung der Abströmkanäle 5 und der Rückführkanäle 6 kann auch in anderer Weise als zeichnerisch dargestellt erfolgen. So kann es u. U. zwecks besserer Temperaturverteilung und/oder besserer Vermischung der Gasströme vorteilhaft sein, die Rückführkanäle 6 in zwei Sektoren aufzuteilen, insbesondere dann, wenn der Abgasanteil über die Rückführkanäle groß gewählt wird.FIG. 2 shows a longitudinal section through the particle filter 3, the section plane being placed lengthwise through the outflow channels 5 and return channels 6. The exhaust gas passing through the filter wall 4 passes in the area of the outflow channels 5 directly into an outlet connection piece 8 or in the area of the return channels 6 first into the area of a hot gas chamber 9 and from there via the outflow channels 5 also to the outlet connection piece 8. The return of a partial exhaust gas flow is necessary in order to avoid too high a temperature (eg> 800 ° C) at the particle filter on the hot gas chamber side when the burner is operating. The arrangement of the outflow channels 5 and the return channels 6 can also be done in a different way than shown in the drawing. So it can For the purpose of better temperature distribution and / or better mixing of the gas streams, it may be advantageous to divide the return channels 6 into two sectors, in particular if the exhaust gas fraction is selected to be large via the return channels.

Die Heißgaskammer 9 ist durch eine Prallscheibe 10 von einer Brennkammer 11 getrennt. Die geometrische Ausdehnung der Prallscheibe 10 und zeichnerisch nicht dargestellte Durchbrüche in der Prallscheibe sind so zu bemessen, daß einerseits der Abgasstrom aus den Rückführkanälen 6 von der Brennkammer 11 ferngehalten wird und andererseits aber auch eine ausreichende Durchlässigkeit für das Brennerabgas aus der Brennkammer 11 in die Heißgaskammer 9 gegeben ist. Des weiteren ist die Ausgestaltung der Prallscheibe 10 in der Weise vorzunehmen, daß eine möglichst gute Vermischung der Brenner-Heißgase mit dem Abgasstrom aus den Rückführkanälen 6 erfolgt, mit dem Ziel, daß beim Eintritt des Gasgemisches in die Abströmkanäle 5 eine möglichst gleiche Temperatur des Mischgases erreicht wird. Die Prallscheibe 10 kann aus temperaturbeständigem Material (Metall, Keramik, .....) z. B. in Form eines Bleches, eines Rohrnetzes oder eines gasdurchlässigen Drahtgeflechtes ausgeführt werden.The hot gas chamber 9 is separated from a combustion chamber 11 by a baffle plate 10. The geometric extension of the baffle plate 10 and openings in the baffle plate, not shown in the drawing, are to be dimensioned such that, on the one hand, the exhaust gas flow from the return channels 6 is kept away from the combustion chamber 11 and, on the other hand, sufficient permeability for the burner exhaust gas from the combustion chamber 11 into the hot gas chamber 9 is given. Furthermore, the design of the baffle plate 10 is to be carried out in such a way that the burner hot gases are mixed as well as possible with the exhaust gas flow from the return channels 6, with the aim that the temperature of the mixed gas being as equal as possible when the gas mixture enters the outflow channels 5 is achieved. The baffle plate 10 can be made of temperature-resistant material (metal, ceramic, .....) z. B. in the form of a sheet, a pipe network or a gas-permeable wire mesh.

Fig. 3 zeigt den Partikelfilter 3 mit angesetzter Brennkammer 11 in einem um 90° gedrehten Längsschnitt. Der Brennkammer 11 wird das Brenngemisch aus einer Brenner-Mischkammer 12 über eine Öffnung 13 zugeführt, die ihrerseits vorzugsweise von einer luftgestützten Zerstäuberdüse 14 mit Brenngemisch versorgt wird. Die Heißgaskammer 9, Brennkammer 11 sowie die Brenner-Mischkammer 12 bilden einen Heizdom, der stromab der Filtereinrichtung angeordnet ist. Eine Zündkerze 15 wird im Bereich einer Öffnung 13 angeordnet. Ein Flammwächter 16 überwacht aus Sicherheitsgründen die Brennerfunktion. Auf die Darstellung der weiteren, für die Funktion des Brennersystems erforderlichen Peripherie, kann hier verzichtet werden, weil diese im Hinblick auf die Brennstoff- und Luftversorgung einschließlich der Zumessung, des Zündmoduls und der Steuerelektronik mit der Erfindung nichts zu tun hat.3 shows the particle filter 3 with the combustion chamber 11 attached in a longitudinal section rotated by 90 °. The combustion mixture is fed to the combustion chamber 11 from a burner mixing chamber 12 via an opening 13, which in turn is preferably supplied with combustion mixture by an air-based atomizing nozzle 14. The hot gas chamber 9, combustion chamber 11 and the burner mixing chamber 12 form a heating dome, which is arranged downstream of the filter device. A spark plug 15 is arranged in the area of an opening 13. A flame monitor 16 monitors the burner function for safety reasons. On the representation of the other necessary for the function of the burner system Periphery can be dispensed with here because it has nothing to do with the invention with regard to the fuel and air supply including metering, the ignition module and the control electronics.

Die Einrichtung zeichnet sich durch folgende Vorteile aus: Keine nennenswerte Auswirkung des je nach Filter-Beladungsgrad und Motordrehzahl veränderlichen Abgasgegendruckes auf die Druckverhältnisse in der Brennkammer. Deshalb kann eine übliche Luftpumpe mit ca. 100-150 mbar Förderdruck zur Versorgung des Brenners mit Brennluft eingesetzt werden und der Brennerbetrieb bei allen Betriebszuständen gewährleistet werden. Diese Luftpumpe ist vorteilhafterweise als Strömungsmaschine ausgeführt.The device is characterized by the following advantages: No significant impact of the exhaust gas back pressure, which varies depending on the filter load and engine speed, on the pressure conditions in the combustion chamber. For this reason, a conventional air pump with a delivery pressure of approx. 100-150 mbar can be used to supply the burner with combustion air and burner operation can be guaranteed in all operating states. This air pump is advantageously designed as a turbomachine.

Die Brenner-Heizenergie wir nur auf einen Teilabgasstrom übertragen, nämlich den, der durch die Rückführkanäle 6 gelangt. Um das Abgasgemisch auf eine für die Einleitung der Regenerierung erforderliche Temperatur zu erwärmen, ist daher nur ein entsprechend geringer Energieeinsatz erforderlich. Nach Beginn der Regenerierung auf der Heißgaskammer-Seite durchläuft die Regenerierungszone den gesamten Partikelfilter 3, wobei zunehmend das Abgas bereits in den Einströmkanälen 2 erhitzt und die bei der Verbrennung der Rußpartikel freiwerdende Wärme zur Aufheizung des restlichen Filterkörpers genutzt wird. Andererseits kann der Anteil des rückgeführten Abgasstromes so gewählt werden, daß eine Überschreitung der zulässigen Höchsttemperatur vermieden werden kann.The burner heating energy is only transferred to a partial exhaust gas flow, namely that which passes through the return channels 6. In order to heat the exhaust gas mixture to a temperature required to initiate regeneration, only a correspondingly small amount of energy is required. After the start of the regeneration on the hot gas chamber side, the regeneration zone runs through the entire particle filter 3, with the exhaust gas increasingly being heated in the inflow channels 2 and the heat released during the combustion of the soot particles being used to heat the rest of the filter body. On the other hand, the proportion of the recirculated exhaust gas flow can be selected so that an exceeding of the permissible maximum temperature can be avoided.

Durch die Anordnung des Brennersystems im Bereich des gefilterten Abgasstromes (stromab der Filterwand) ist die Gefahr unzulässiger Rußablagerungen am Austritt der Zerstäuberdüse, an der Zündkerze und dem Flammenwächter erheblich verringert.By arranging the burner system in the area of the filtered exhaust gas flow (downstream of the filter wall), the risk of impermissible soot deposits at the outlet of the atomizer nozzle, on the spark plug and the flame monitor is considerably reduced.

Aus den vorgenannten Vorteilen resultiert eine wesentlich erhöhte Betriebssicherheit.The aforementioned advantages result in significantly increased operational reliability.

Claims (3)

  1. Exhaust gas purification device for diesel engines, consisting of a filter device for collecting carbon particles (soot) and of a burner device for burning off the particles deposited at the filter, the burner device being arranged downstream of the filter device and in a heating dome through which no exhaust gas flows and which comprises a combustion chamber (11) and a hot-gas chamber (9), the two chambers being connected by an opening (13) and demarcated by a deflector plate (10), characterised in that the filter device comprises return channels (6) through which a partial quantity of the purified exhaust gases is conveyed into the hot-gas chamber (9).
  2. Device according to claim 1, characterised in that the deflector plate (10) is in the form of a sheet metal, piping or wire mesh construction, resulting in the hot burner gases mixing well with the returned partial exhaust gas quantity.
  3. Device according to one of the preceding claims, characterised in that the burner unit comprises an air pump which is formed as a turbo-machine.
EP93113329A 1992-09-01 1993-08-20 Exhaust gas purification device for diesel engines Expired - Lifetime EP0585752B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4229103A DE4229103A1 (en) 1992-09-01 1992-09-01 Exhaust gas cleaning device for diesel internal combustion engines
DE4229103 1992-09-01

Publications (2)

Publication Number Publication Date
EP0585752A1 EP0585752A1 (en) 1994-03-09
EP0585752B1 true EP0585752B1 (en) 1995-07-12

Family

ID=6466937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93113329A Expired - Lifetime EP0585752B1 (en) 1992-09-01 1993-08-20 Exhaust gas purification device for diesel engines

Country Status (2)

Country Link
EP (1) EP0585752B1 (en)
DE (2) DE4229103A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19810738C1 (en) 1998-03-12 1999-04-22 Hjs Fahrzeugtechnik Gmbh & Co Cleaning of filter elements in the exhaust of diesel engines
DE102006015841B3 (en) 2006-04-03 2007-08-02 TWK Engineering Entwicklungstechnik (GbR) (vertretungsberechtigte Gesellschafter Herrn Thomas Winter, Jagdhaus am Breitenberg, 56244 Ötzingen und Herrn Waldemar Karsten, Am Merzenborn 6, 56422 Wirges) Regeneration of particle filters comprises burning fuel under oxygen deficiency in first combustion chamber, and introducing gas produced to second chamber where air current is produced flowing in direction counter to direction of gas flow

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5925024A (en) * 1982-08-02 1984-02-08 Hitachi Ltd Exhaust gas purging device of diesel engine
JPS5977022A (en) * 1982-10-23 1984-05-02 Mitsubishi Motors Corp Exhaust gas purifier for diesel engine
DE3808075A1 (en) * 1988-03-11 1989-09-21 Rohs Ulrich Mechanical soot filter device
JPH04153516A (en) * 1990-10-15 1992-05-27 Tonen Corp Exhaust gas purification device for diesel engine

Also Published As

Publication number Publication date
EP0585752A1 (en) 1994-03-09
DE59300348D1 (en) 1995-08-17
DE4229103A1 (en) 1994-03-03

Similar Documents

Publication Publication Date Title
EP0238916B1 (en) Process and device for the regeneration of exhaust filter systems
EP0072059B1 (en) Supercharged internal-combustion engine with a filter for exhaust gas particles
DE3874924T2 (en) DIESEL EXHAUST PARTICLE FILTER.
EP0367280B1 (en) Particle filter system
EP0306743B1 (en) Soot filter process and soot filter device for a diesel engine
DE2953010C2 (en)
DE2854268A1 (en) EXHAUST GAS CLEANER FOR DIESEL ENGINES
DE102005062475A1 (en) System for removing substances from filter device in engines has several blocking parts for blocking a flow directed through one of several filter ports in filter
DE4239079A1 (en) Burner system for exhaust gas detoxification or purification of an internal combustion engine
DE4007516A1 (en) Reduction of exhaust pollution of diesel engine - by fitting particle filter and oxidising catalyser
EP0758959A1 (en) Combustion chamber of a burner for a vehicle heater or an exhaust gas particle filter
DE3024539C2 (en) Device for removing soot from the exhaust gases of an internal combustion engine
DE2852226A1 (en) SOOT FILTERS IN THE EXHAUST FLOW OF AIR COMPRESSING INTERNAL COMBUSTION ENGINES
EP0631039B1 (en) Burner for heating up an exhaust catalyst quickly and independently of the engine
EP0837980A1 (en) Device for purifying waste gas from a mixture-compressing internal combustion engine
US4622810A (en) Device for removing particulates in exhaust gas
DE3545437C2 (en)
EP0585752B1 (en) Exhaust gas purification device for diesel engines
DE3204176C2 (en)
DE3837073A1 (en) SOOT FILTER FOR DIESEL VEHICLES
DE10202005B4 (en) filtering device
EP0638776B1 (en) Device for reducing the emission of odour and pollutants of heating apparatus for vehicles
EP1882831A1 (en) Exhaust unit of a diesel engine
DE4327086C1 (en) Method for the cleaning of particle filters
DE19530966A1 (en) Diesel engine exhaust gas purification system with filter for soot particles

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19930906

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19950104

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO ROMA S.P.A.

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59300348

Country of ref document: DE

Date of ref document: 19950817

RAP4 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: PIERBURG GMBH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950921

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: CJ

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990722

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000717

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20000801

Year of fee payment: 8

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

Ref country code: DE

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 20000816

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

Ref country code: GB

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

Effective date: 20010820

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010820

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

Ref country code: FR

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

Effective date: 20020430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050820