EP0380806A1 - Ignition burner for a device for burning solid particles in the exhaust gas of internal-combustion engines - Google Patents

Ignition burner for a device for burning solid particles in the exhaust gas of internal-combustion engines Download PDF

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Publication number
EP0380806A1
EP0380806A1 EP19890123902 EP89123902A EP0380806A1 EP 0380806 A1 EP0380806 A1 EP 0380806A1 EP 19890123902 EP19890123902 EP 19890123902 EP 89123902 A EP89123902 A EP 89123902A EP 0380806 A1 EP0380806 A1 EP 0380806A1
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EP
European Patent Office
Prior art keywords
protective sleeve
chamber
glow plug
receiving chamber
pilot burner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19890123902
Other languages
German (de)
French (fr)
Inventor
Ulrich Dr. Projahn
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Priority claimed from DE19893903065 external-priority patent/DE3903065A1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0380806A1 publication Critical patent/EP0380806A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • 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
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/14—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel burner
    • 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
    • F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic separators
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/30—Arrangements for supply of additional air
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/36—Arrangements for supply of additional fuel
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/38—Arrangements for igniting

Definitions

  • the invention is based on a pilot burner for a device for burning solid particles, in particular soot particles, in the exhaust gas of internal combustion engines according to the preamble of claim 1.
  • the main application P 37 32 491.8 proposes to surround the glow plug with a protective sleeve in a pilot burner provided with a glow plug.
  • Fuel supplied to the pilot burner hits the protective sleeve heated by the glow plug and vaporizes.
  • the fuel passes from the protective sleeve into a mixture preparation chamber, into which the air required for combustion is also fed.
  • An incandescent body is arranged in the mixture processing chamber and serves to stabilize the flame during the combustion of the fuel-air mixture.
  • the invention has for its object to design the pilot burner of the main application so that the evaporation of the supplied fuel is further improved.
  • the pilot burner according to the invention with the characterizing features of claim 1 has the advantage that the surface of the protective sleeve is enlarged and thus a better evaporation of the fuel is achieved and only a short preheating time of the glow plug is required when starting the pilot burner. In addition, the ignition of the fuel-air mixture is stabilized so that a glow plug is no longer required in the mixture preparation chamber.
  • FIG. 1 shows a longitudinal section of a pilot burner for a combustion device in motor vehicles
  • FIG. 2 shows a section of the pilot burner according to line II-II in FIG. 1
  • FIG. 3 shows a section of the pilot burner according to line II-II in FIG. 1 with a second exemplary embodiment.
  • the pilot burner shown in longitudinal section in FIG. 1 and in cross section in FIG. 2 has a hollow cylindrical mixture processing chamber 10, hereinafter referred to as processing chamber 10, and a glow plug receiving chamber 11, hereinafter referred to as receiving chamber 11. Both chambers 10, 11 run at right angles to one another, their longitudinal axes lying in one plane.
  • the processing chamber 10 is approximately horizontal and the receiving chamber 11 is vertical, the latter being inserted with its one open end into a circular cylindrical opening 12 in the chamber wall of the processing chamber 10.
  • the processing chamber 10 is closed at one end and instructs at the other end, a mixture outlet opening 13, to which a combustion chamber of the combustion device, which is not shown, is connected.
  • An air supply line 18 opens near the closed end wall of the treatment chamber 10 with an inflow direction tangential to the treatment chamber 10.
  • a glow plug 22 is held coaxially, which is screwed with a plug connection thread 23 into an internal thread section 24 at the end of the receiving chamber 11 facing away from the opening 12 (FIG. 2).
  • the glow plug 22 protrudes with its filament 25 close to the opening 12 to the treatment chamber 10.
  • the glow plug 22 is coaxially enclosed by a protective sleeve 26 with radial spacing.
  • the protective sleeve 26 consists of a multi-layer, fine-mesh wire fabric.
  • the wire mesh can be designed, for example, as a square mesh or as a braid.
  • the wire mesh is secured at the free end of the protective sleeve 26 by plasma welding against fraying.
  • a mouthpiece 27 of a fuel feed line 28 projects radially into the receiving chamber 11 and its mouth 29 lies directly in front of the outer wall of the protective sleeve 26.
  • the design of the protective sleeve 26 made of wire mesh greatly increases its surface area and thus ensures a very uniform evaporation of the fuel striking the protective sleeve 26, so that no more incandescent bodies are required in the processing chamber 10 to stabilize the flame.
  • the glow plug 22 is supplied with current via two electrical connecting lines 31 and 32. In order to avoid overheating of the electrical connections, the receiving chamber 11 is cooled in the area of its internally threaded section 24.
  • the protective sleeve 26 is welded at its one end to a sleeve 37 screwed into the internally threaded section 124 of the receiving chamber 11.
  • the sleeve 37 is provided with a threaded bore 38 for receiving the glow plug 22 and has a hexagon 39 in its area protruding from the receiving chamber 11.
  • the sleeve 37 can be easily screwed out of the receiving chamber 11, so that a change of the protective sleeve 26 is possible without great effort.
  • the glow plug 22 of the pilot burner is first supplied with current and fuel is fed through the fuel feed line 28 into the receiving chamber 11.
  • combustion air is conveyed into the processing chamber 10 via the air supply line 18, which causes a rotary flow in the processing chamber 10 as a result of the tangential inflow direction.
  • the fuel striking the protective sleeve 26 heated by the glow plug 22 evaporates and mixes in the processing chamber 10 with the combustion air.
  • the fuel-air mixture ignites and the flame strikes through the mixture outlet opening 13 into the connected combustion chamber of the combustion device.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wick-Type Burners And Burners With Porous Materials (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

An ignition burner for a device for burning solid particles, especially soot particles, in the exhaust gas of internal-combustion engines, having a hollow-cylindrical mixture preparation chamber (10) and a hollow-cylindrical glow plug holding chamber (11) which runs at right angles thereto and is connected thereto via an opening (12). A fuel inlet line (28) opens into the holding chamber (11) and an air inlet line (18) opens into the preparation chamber (10). The glow plug (22) is coaxially surrounded in the region of its glow coil (25) at a radial distance by a protective sleeve (26) consisting of a wire mesh. The fuel inlet line (28) ends in a mouth connecting piece (27) which projects radially into the holding chamber (11) and opens directly in front of the protective sleeve (26). The protective sleeve (26) has a large surface so that the fuel impinging on it is vaporised evenly. The protective sleeve (26) is welded to a sleeve (37), screwed into the holding chamber (11), and can thus easily be replaced. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Zündbrenner für eine Vorrichtung zum Verbrennen von Festkörperpartikeln, insbesondere Rußteilchen, im Abgas von Brennkraftmaschinen nach der Gattung des Anspruchs 1.The invention is based on a pilot burner for a device for burning solid particles, in particular soot particles, in the exhaust gas of internal combustion engines according to the preamble of claim 1.

In der Hauptanmeldung P 37 32 491.8 wird vorgeschlagen, bei einem mit einer Glühkerze versehenen Zündbrenner die Glühkerze mit einer Schutzhülse zu umgeben. Dem Zündbrenner zugeführter Brennstoff trifft auf die durch die Glühkerze erhitzte Schutzhülse auf und ver­dampft. Der Brennstoff gelangt von der Schutzhulse in eine Gemisch­aufbereitungskammer, in die auch die zur Verbrennung erforderliche Luft zugeführt wird. In der Gemischaufbereitungskammer ist ein Glüh­körper angeordnet, der zur Stabilisierung der Flamme bei der Ver­brennung des Brennstoff-Luftgemischs dient.The main application P 37 32 491.8 proposes to surround the glow plug with a protective sleeve in a pilot burner provided with a glow plug. Fuel supplied to the pilot burner hits the protective sleeve heated by the glow plug and vaporizes. The fuel passes from the protective sleeve into a mixture preparation chamber, into which the air required for combustion is also fed. An incandescent body is arranged in the mixture processing chamber and serves to stabilize the flame during the combustion of the fuel-air mixture.

Der Erfindung liegt die Aufgabe zugrunde, den Zündbrenner der Haupt­anmeldung so auszubilden, daß die Verdampfung des zugeführten Brenn­stoffs weiter verbessert ist.The invention has for its object to design the pilot burner of the main application so that the evaporation of the supplied fuel is further improved.

Der erfindungsgemäße Zündbrenner mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, daß die Oberfläche der Schutzhülse vergrößert ist und damit eine bessere Verdampfung des Brennstoffs erreicht ist und bei Inbetriebnahme des Zündbrenners nur eine kurze Vorglühzeit der Glühkerze erforderlich ist. Außerdem ist die Ent­flammung des Brennstoff-Luftgemischs so stabilisiert, daß in der Gemischaufbereitungskammer kein Glühkörper mehr erforderlich ist.The pilot burner according to the invention with the characterizing features of claim 1 has the advantage that the surface of the protective sleeve is enlarged and thus a better evaporation of the fuel is achieved and only a short preheating time of the glow plug is required when starting the pilot burner. In addition, the ignition of the fuel-air mixture is stabilized so that a glow plug is no longer required in the mixture preparation chamber.

In den Unteransprüchen sind vorteilhafte Ausgestaltungen und Weiter­bildungen des Zündbrenners gekennzeichnet. Durch die Weiterbildung nach Anspruch 3 ist ein leichtes Auswechseln der Schutzhülse ermög­licht.Advantageous refinements and developments of the pilot burner are characterized in the subclaims. The further development according to claim 3 enables easy replacement of the protective sleeve.

Die Erfindung ist anhand von in der Zeichnung dargestellten Ausfüh­rungsbeispielen in der nachfolgenden Beschreibung näher erläutert. Es zeigen: Figur 1 einen Längsschnitt eines Zündbrenners für eine Verbrennungsvorrichtung in Kraftfahrzeugen, Figur 2 einen Schnitt des Zündbrenners gemäß Linie II - II in Figur 1 und Figur 3 einen Schnitt des Zündbrenners gemäß Linie II - II in Figur 1 mit einem zweiten Ausführungsbeispiel.The invention is explained in more detail in the following description with reference to exemplary embodiments shown in the drawing. 1 shows a longitudinal section of a pilot burner for a combustion device in motor vehicles, FIG. 2 shows a section of the pilot burner according to line II-II in FIG. 1, and FIG. 3 shows a section of the pilot burner according to line II-II in FIG. 1 with a second exemplary embodiment.

Der in Figur 1 im Längsschnitt und in Figur 2 im Querschnitt darge­stellte Zündbrenner weist eine hohlzylindrische Gemischaufberei­tungskammer 10, im folgenden kurz Aufbereitskammer 10 genannt, und eine Glühkerzenaufnahmekammer 11, im folgenden kurz Aufnahmekammer 11 genannt, auf. Beide Kammern 10, 11 verlaufen rechtwinklig zuein­ander, wobei ihre Längsachsen in einer Ebene liegen. In Einbaulage des Zündbrenners liegt die Aufbereitungskammer 10 etwa horizontal und die Aufnahmekammer 11 vertikal, wobei letztere mit ihrem einen offenen Stirnende in eine kreiszylindrische Öffnung 12 in der Kam­merwand der Aufbereitungskammer 10 eingesetzt ist. Die Aufberei­tungskammer 10 ist an einem Stirnende verschlossen und weist an ihrem anderen Stirnende eine Gemischaustrittsöffnung 13 auf, an wel­che eine weiter nicht dargestellte Brennkammer der Verbrennungsvor­richtung angeschlossen wird. Nahe der geschlossenen Stirnwand der Aufbereitungskammer 10 mündet eine Luftzuführleitung 18 mit zur Auf­bereitungskammer 10 tangentialer Einströmrichtung.The pilot burner shown in longitudinal section in FIG. 1 and in cross section in FIG. 2 has a hollow cylindrical mixture processing chamber 10, hereinafter referred to as processing chamber 10, and a glow plug receiving chamber 11, hereinafter referred to as receiving chamber 11. Both chambers 10, 11 run at right angles to one another, their longitudinal axes lying in one plane. In the installed position of the pilot burner, the processing chamber 10 is approximately horizontal and the receiving chamber 11 is vertical, the latter being inserted with its one open end into a circular cylindrical opening 12 in the chamber wall of the processing chamber 10. The processing chamber 10 is closed at one end and instructs at the other end, a mixture outlet opening 13, to which a combustion chamber of the combustion device, which is not shown, is connected. An air supply line 18 opens near the closed end wall of the treatment chamber 10 with an inflow direction tangential to the treatment chamber 10.

In der Aufnahmekammer 11 ist koaxial eine Glühkerze 22 gehalten, die mit einem Kerzenanschlußgewinde 23 in einen Innengewindeabschnitt 24 an dem der Öffnung 12 abgekehrten Ende der Aufnahmekammer 11 einge­schraubt ist (Figur 2). Die Glühkerze 22 ragt mit ihrer Glühwendel 25 bis nahe an die Öffnung 12 zur Aufbereitungskammer 10. Im Bereich der Glühwendel 25 ist die Glühkerze 22 von einer Schutzhülse 26 mit Radialabstand koaxial umschlossen. Die Schutzhulse 26 besteht aus einem mehrlagigen feinmaschigen Drahtgewebe. Das Drahtgewebe kann beispielsweise als ein Quadratmaschengewebe oder als ein Tressen­gewebe ausgeführt sein. Das Drahtgewebe ist am freien Stirnende der Schutzhülse 26 durch Plasmaschweißen gegen Ausfransen gesichert.In the receiving chamber 11, a glow plug 22 is held coaxially, which is screwed with a plug connection thread 23 into an internal thread section 24 at the end of the receiving chamber 11 facing away from the opening 12 (FIG. 2). The glow plug 22 protrudes with its filament 25 close to the opening 12 to the treatment chamber 10. In the area of the filament 25, the glow plug 22 is coaxially enclosed by a protective sleeve 26 with radial spacing. The protective sleeve 26 consists of a multi-layer, fine-mesh wire fabric. The wire mesh can be designed, for example, as a square mesh or as a braid. The wire mesh is secured at the free end of the protective sleeve 26 by plasma welding against fraying.

In die Aufnahmekammer 11 ragt radial ein Mündungsstutzen 27 einer Brennstoffzulaufleitung 28 hinein, dessen Mündung 29 unmittelbar vor der Außenwand der Schutzhülse 26 liegt. Durch die Ausführung der Schutzhülse 26 aus Drahtgewebe ist deren Oberfläche stark vergrößert und damit eine sehr gleichmäßige Verdampfung des auf die Schutzhülse 26 treffenden Brennstoffs gewährleistet, so daß in der Aufberei­tungskammer 10 kein Glühkörper mehr zur Stabilisierung der Flamme erforderlich ist. Bei Inbetriebnahme des Zündbrenners ist nur eine kurze Vorglühzeit der Glühkerze 22 erforderlich, da sich das Draht­gewebe der Schutzhülse 26 schnell erhitzt. Die Glühkerze 22 wird über zwei elektrische Anschlußleitungen 31 und 32 mit Strom ver­sorgt. Um eine Überhitzung der elektrischen Anschlüsse zu vermeiden ist die Aufnahmekammer 11 im Bereich ihres Innengewindeabschnitts 24 gekühlt.A mouthpiece 27 of a fuel feed line 28 projects radially into the receiving chamber 11 and its mouth 29 lies directly in front of the outer wall of the protective sleeve 26. The design of the protective sleeve 26 made of wire mesh greatly increases its surface area and thus ensures a very uniform evaporation of the fuel striking the protective sleeve 26, so that no more incandescent bodies are required in the processing chamber 10 to stabilize the flame. When the pilot burner is started up, only a short preheating time of the glow plug 22 is required, since the wire mesh of the protective sleeve 26 heats up quickly. The glow plug 22 is supplied with current via two electrical connecting lines 31 and 32. In order to avoid overheating of the electrical connections, the receiving chamber 11 is cooled in the area of its internally threaded section 24.

Bei einem in Figur 3 dargestellten zweiten Ausführungsbeispiel ist die Schutzhülse 26 an ihrem einen Stirnende mit einer in den Innen­gewindeabschnitt 124 der Aufnahmekammer 11 geschraubten Hülse 37 verschweißt. Die Hülse 37 ist mit einer Gewindebohrung 38 zur Auf­nahme der Glühkerze 22 versehen und weist in ihrem aus der Aufnahme­kammer 11 ragenden Bereich einen Sechskant 39 auf. Die Hülse 37 kann leicht aus der Aufnahmekammer 11 herausgeschraubt werden, so daß auch ein Wechsel der Schutzhülse 26 ohne großen Aufwand möglich ist.In a second exemplary embodiment shown in FIG. 3, the protective sleeve 26 is welded at its one end to a sleeve 37 screwed into the internally threaded section 124 of the receiving chamber 11. The sleeve 37 is provided with a threaded bore 38 for receiving the glow plug 22 and has a hexagon 39 in its area protruding from the receiving chamber 11. The sleeve 37 can be easily screwed out of the receiving chamber 11, so that a change of the protective sleeve 26 is possible without great effort.

Zur Inbetriebnahme der Verbrennungsvorrichtung wird zunächst die Glühkerze 22 des Zündbrenners mit Strom versorgt und durch die Brennstoffzulaufleitung 28 Brennstoff in die Aufnahmekammer 11 ge­leitet. Gleichzeitig wird über die Luftzuführleitung 18 Verbren­nungsluft in die Aufbereitungskammer 10 gefördert, die infolge der tangentialen Einströmrichtung in der Aufbereitungskammer 10 eine Drehströmung hervorruft. Der auf die von der Glühkerze 22 aufge­heizte Schutzhülse 26 auftreffende Brennstoff verdampft und ver­mischt sich in der Aufbereitungskammer 10 mit der Verbrennungsluft. Bei Erreichen einer bestimmten Temperatur entzündet sich das Brenn­stoff-Luftgemisch, und die Flamme schlägt durch die Gemischaus­trittsöffnung 13 in die angeschlossene Brennkammer der Verbrennungs­vorrichtung.To start up the combustion device, the glow plug 22 of the pilot burner is first supplied with current and fuel is fed through the fuel feed line 28 into the receiving chamber 11. At the same time, combustion air is conveyed into the processing chamber 10 via the air supply line 18, which causes a rotary flow in the processing chamber 10 as a result of the tangential inflow direction. The fuel striking the protective sleeve 26 heated by the glow plug 22 evaporates and mixes in the processing chamber 10 with the combustion air. When a certain temperature is reached, the fuel-air mixture ignites and the flame strikes through the mixture outlet opening 13 into the connected combustion chamber of the combustion device.

Claims (4)

1. Zündbrenner für eine Vorrichtung zum Verbrennen von Festkörper­partikeln, insbesondere Rußteilchen, im Abgas von Brennkraftma­schinen, mit einer hohlzylindrischen Gemischaufbereitungskammer (10), die in einem Stirnende verschlossen ist und an dem anderen Stirnende eine zur Vorrichtung zum Verbrennen führende Gemischaus­trittsöffnung (13) aufweist, mit einer zur Gemischaufbereitungs­kammer (10) quer verlaufenden, eine Glühkerze (22) koaxial aufneh­menden hohlzylindrischen Aufnahmekammer (11), die mit der Gemisch­aufbereitungskammer (10) in Verbindung steht, mit einer in die Auf­nahmekammer (11) in einem radialen Mündungsstutzen (27) mündenden Brennstoffzulaufleitung (28) für flüssigen Brennstoff und mit einer in die Gemischaufbereitungskammer (10) mit tangentialer Einström­richtung mündenden Luftzuführleitung (18), wobei die Glühkerze (22) im Bereich der Glühwendel (25) von einer dünnwandigen Schutzhülse (26) mit Radialabstand koaxial umschlossen ist und der Mündungs­stutzen (27) der Brennstoffzulaufleitung (28) in die Aufnahmekammer (11) hineinragt und seine Mündungsöffnung (29) sehr dicht an der Schutzhülse (26) liegt, nach Patentanmeldung P 37 32 491.8, dadurch gekennzeichnet, daß die Schutzhülse (26) aus einem feinmaschigen Drahtgewebe besteht.1. A pilot burner for a device for burning solid particles, in particular soot particles, in the exhaust gas of internal combustion engines, with a hollow cylindrical mixture preparation chamber (10) which is closed in one end and has a mixture outlet opening (13) leading to the device for combustion at the other end, with a hollow cylindrical receiving chamber (11) which runs transversely to the mixture preparation chamber (10) and which coaxially receives a glow plug (22) and which is connected to the mixture preparation chamber (10), with one opening into the receiving chamber (11) in a radial orifice (27) Fuel feed line (28) for liquid fuel and with an air supply line (18) opening into the mixture preparation chamber (10) with a tangential inflow direction, the glow plug (22) being coaxially enclosed in the area of the filament (25) by a thin-walled protective sleeve (26) with a radial distance and the muzzle support n (27) of the fuel feed line (28) protrudes into the receiving chamber (11) and its mouth (29) is very close to the protective sleeve (26), according to patent application P 37 32 491.8, characterized in that the protective sleeve (26) consists of a fine-mesh wire mesh. 2. Zündbrenner nach Anspruch 1, dadurch gekennzeichnet, daß das Drahtgewebe der Schutzhülse (26) mehrlagig ausgeführt ist.2. pilot burner according to claim 1, characterized in that the wire mesh of the protective sleeve (26) is designed in multiple layers. 3. Zündbrenner nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Drahtgewebe der Schutzhülse (26) mit einer in die Aufnahmekammer (11) lösbar eingesetzten Hülse (37) verschweißt ist, die mit einer Gewindebohrung (38) zur Aufnahme der Glühkerze (22) versehen ist.3. pilot burner according to claim 1 or 2, characterized in that the wire mesh of the protective sleeve (26) with a releasably inserted into the receiving chamber (11) sleeve (37) is welded with a threaded bore (38) for receiving the glow plug (22 ) is provided. 4. Zündbrenner nach Anspruch 3, dadurch gekennzeichnet, daß die Hül­se (37) in einen Innengewindeabschnitt (124) der Aufnahmekammer (11) eingeschraubt ist und in ihrem aus der Aufnahmekammer (11) ragenden Bereich mit einem Sechskant (39) versehen ist.4. pilot burner according to claim 3, characterized in that the sleeve (37) is screwed into an internal thread portion (124) of the receiving chamber (11) and in its area protruding from the receiving chamber (11) is provided with a hexagon (39).
EP19890123902 1989-02-02 1989-12-23 Ignition burner for a device for burning solid particles in the exhaust gas of internal-combustion engines Withdrawn EP0380806A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3903065 1989-02-02
DE19893903065 DE3903065A1 (en) 1987-09-26 1989-02-02 Pilot burner for a device for burning solid particles in the exhaust gas of internal combustion engines

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EP0380806A1 true EP0380806A1 (en) 1990-08-08

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EP0839264B1 (en) * 1994-09-13 1999-12-01 Siemens Aktiengesellschaft Process and device for introducing a fluid into an exhaust gas purification system
DE4436415A1 (en) * 1994-10-12 1996-04-18 Bosch Gmbh Robert Device for the aftertreatment of exhaust gases from a self-igniting internal combustion engine
US5771683A (en) * 1995-08-30 1998-06-30 Southwest Research Institute Active porous medium aftertreatment control system
DE19625447B4 (en) * 1996-06-26 2006-06-08 Robert Bosch Gmbh Pipe evaporator for additional fuel into the exhaust
US20060213497A1 (en) * 2005-03-22 2006-09-28 Orozco Miguel D J Barbeque grill
CN103104320B (en) * 2012-12-12 2015-03-25 贵州黄帝车辆净化器有限公司 Diesel engine exhaust aftertreatment device pre-heater and heating method
CN103104319B (en) * 2012-12-12 2015-03-25 贵州黄帝车辆净化器有限公司 Diesel engine exhaust aftertreatment device pre-heater and heating method
JP5962579B2 (en) * 2013-05-13 2016-08-03 株式会社デンソー Combustion equipment

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FR1536827A (en) * 1967-09-15 1968-08-16 Beru Werk Albert Ruprecht Fa Glow plug
JPS59138813A (en) * 1983-01-28 1984-08-09 Iseki & Co Ltd Glow plug
JPS6011021A (en) * 1983-07-01 1985-01-21 Mitsubishi Electric Corp Glow plug for diesel engine
EP0252257A1 (en) * 1986-06-30 1988-01-13 Robert Bosch Gmbh Burning device for solid particles in internal combustion engines exhaust gases
DE3732491A1 (en) * 1987-09-26 1989-04-13 Bosch Gmbh Robert IGNITION BURNER FOR A DEVICE FOR BURNING SOLID PARTICLES IN THE EXHAUST GAS FROM COMBUSTION ENGINES

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FR1536827A (en) * 1967-09-15 1968-08-16 Beru Werk Albert Ruprecht Fa Glow plug
JPS59138813A (en) * 1983-01-28 1984-08-09 Iseki & Co Ltd Glow plug
JPS6011021A (en) * 1983-07-01 1985-01-21 Mitsubishi Electric Corp Glow plug for diesel engine
EP0252257A1 (en) * 1986-06-30 1988-01-13 Robert Bosch Gmbh Burning device for solid particles in internal combustion engines exhaust gases
DE3732491A1 (en) * 1987-09-26 1989-04-13 Bosch Gmbh Robert IGNITION BURNER FOR A DEVICE FOR BURNING SOLID PARTICLES IN THE EXHAUST GAS FROM COMBUSTION ENGINES

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JPH02233819A (en) 1990-09-17

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