EP0132166B1 - Regenierung von Staubfilter, insbesondere für Dieselmotoren - Google Patents

Regenierung von Staubfilter, insbesondere für Dieselmotoren Download PDF

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Publication number
EP0132166B1
EP0132166B1 EP84401194A EP84401194A EP0132166B1 EP 0132166 B1 EP0132166 B1 EP 0132166B1 EP 84401194 A EP84401194 A EP 84401194A EP 84401194 A EP84401194 A EP 84401194A EP 0132166 B1 EP0132166 B1 EP 0132166B1
Authority
EP
European Patent Office
Prior art keywords
filter
organic liquid
gases
plug
vaporisation
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
Application number
EP84401194A
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English (en)
French (fr)
Other versions
EP0132166A1 (de
Inventor
Gérard Revenot
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.)
Renault SA
Original Assignee
Regie Nationale des Usines Renault
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Filing date
Publication date
Application filed by Regie Nationale des Usines Renault filed Critical Regie Nationale des Usines Renault
Priority to AT84401194T priority Critical patent/ATE22963T1/de
Publication of EP0132166A1 publication Critical patent/EP0132166A1/de
Application granted granted Critical
Publication of EP0132166B1 publication Critical patent/EP0132166B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/0231—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—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
    • 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
    • F01N3/029—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 by adding non-fuel substances 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
    • 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
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/04—Adding substances to exhaust gases the substance being hydrogen
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • F01N2610/107—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance using glow plug heating elements
    • 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
    • F01N3/18—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 methods of operation; Control
    • F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/10—Residue burned
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/30—Exhaust treatment

Definitions

  • the present invention relates to the regeneration of solid particle filters for diesel engines, gradually imposed by national laws against atmospheric pollution and intended to significantly reduce the smoke emissions of these engines.
  • Such filters can result from cellular ceramic such as cordierite extruded in the form of a honeycomb monolith, impregnated or not with a catalyst, of which one in two cells is closed at one of its ends; said closed ends alternate from one cell to the other contiguous cell, so that the gas to be filtered cannot flow directly through a given cell, but is, on the contrary, forced to pass through the wall.
  • cellular ceramic such as cordierite extruded in the form of a honeycomb monolith, impregnated or not with a catalyst, of which one in two cells is closed at one of its ends; said closed ends alternate from one cell to the other contiguous cell, so that the gas to be filtered cannot flow directly through a given cell, but is, on the contrary, forced to pass through the wall.
  • the drawbacks are manifold: momentary and annoying disturbances in the operation of the engine, risk of formation of carbon particles resulting from incomplete cracking, or of the non-ignition of the oil burner, need to have a air pump, etc.
  • the object of the present invention overcomes the above drawbacks; the oxidation of trapped carbon particles occurs using a simplified device, normally not using an air injection pump, compact and integrated inside the pot containing the ceramic filter.
  • the energy supply is determined by the injection of an organic liquid such as methanol, vaporizing at low temperature (around 70 ° C), not releasing any annoying by-product when it is cracked; this gives rise to a very rich combustible gas comprising a large quantity of hydrogen which is easy to ignite.
  • an organic liquid such as methanol
  • the filter 1 of FIG. 1 is subjected by its left part to the incident flow of exhaust gas from the diesel engine. It can be seen that on this side, only one out of two cells is of free access, the other comprising a closure 2.
  • the right face of this filter also has closures 3 corresponding to the opposite ends of the cells of free access on the left side of the filter.
  • the arrows clearly show the path of the gases through the walls 5 of the cells and makes it possible to grasp the phenomenon of fouling of the filter resulting from the accumulation of carbon particles 4 on the porous walls of the cells.
  • This filter 1 is found in FIG. 2, included in the cylindrical part of a pot 20 crossed by the exhaust gases arriving through its upper part 21 and leaving it, purified, in its lower part 22.
  • an organic liquid of the methanol type coming from a reservoir 23 is dosed, and periodically injected, into the upper zone 24 of the pot, the flow rate of this injection being optionally modulated over time, after having possibly been preheated and vaporized by passing at 25 in contact with the pot 20.
  • the filter 1 is non-catalytic, the preceding mixture ignites on contact with the spark plug 27 and raises the temperature of the filter and of its carbon particles 4; the latter oxidize to C0 2 and pass through the walls 5.
  • the filter 1 has been impregnated with a catalytic phase (preferably based on platinum or palladium), the cracked gas burns only at the level of the catalytic support 1 itself and thus causes the combustion of the carbon particles .
  • the temperature at which the soot starts to burn is significantly lower than that of the previous case and is of the order of 450 ° C.
  • organic liquids of the e x HyO z type can be used in accordance with the above; preferably those which have a rather low vaporization temperature will be chosen, such as ethanol, if necessary glycol, or glycerin, or a mixture of these giving a stable gas mixture. This list is not exhaustive.
  • the desired gas mixture is highly flammable, being essentially composed of carbon monoxide (33%) and hydrogen (66%).
  • the triggering of the filter regeneration operation follows the detection of clogging of the latter and can be made automatic. It results from the supply of an electrical signal which comes from the contact being established between two ceramic electrodes, originally insulating and made conductive by accumulation of carbon particles; or relates to the measurement of an overpressure in the enclosure of the pot 20 for a given speed of rotation of the motor; or results from the counting of a determined number of engine revolutions, etc.
  • an opening signal arrives at the solenoid valve 28, which determines the filling of the capacity 29 corresponding to the volume of organic liquid necessary for the regeneration of the filter. Then control the closing of the solenoid valve 28 and the opening of the solenoid valve 30, causing the introduction by gravity of the organic liquid via the pipe 31, in the prechamber 26 in which the heating plug 27 is simultaneously energized by any known means.
  • the organic liquid due to the calories taken in contact with the exhaust wall at 25 and under the influence of the candle 27, is transformed after cracking into gas with high calorific value which, when burning, determines the combustion of the particles of carbon trapped in filter 1 during engine idling.
  • the organic liquid can also be metered by means of a small turbine pump with timed electric control, then driven through a calibrated opening, or any other equivalent means.
  • the filter 1 located in the cylindrical part of the pot 20, at the upper end 21 from which the exhaust gases arrive.
  • the organic liquid arrives via the pipe 31 at the prechamber 26 containing the heating candle 27, the free end of which opens inside the upper end of the pot 20, in a burner body 32 curved towards the filter 1 and having on its opposite face, openings 33 through which an exhaust gas flow passes.
  • the dynamic pressure of the latter ensures a good mixture of the cracking gases coming from the prechamber 26 and the oxygen contained in the exhaust gases, at the hottest end 34 of the spark plug, thereby causing their combustion.
  • the internal diameter of the burner 32 is of the order of three times that of the end 34 of the spark plug that it surrounds.
  • the liquid or its vapor phase encounters a vaporization zone at medium temperature (500 C C), located around the part 35 of the plug 27 prior to its reduction in diameter.
  • medium temperature 500 C C
  • the vapor of organic liquid then crosses a cracking zone at high temperature represented by the small diameter part 38 of the candle brought to approximately 1000 ° C. and the extension 36 of the front part of the prechamber 26 which surrounds it at a short distance close to 1 mm, over a length close to a third of that of the active part of the candle.
  • the cracked gases then arrive at a hot point formed by the end 34 of the spark plug, at the level of which they mix with the exhaust gases and ignite, thus constituting the heat supply necessary for the oxidation of the particles of carbon 4 trapped in the filter 1.
  • the surface of the latter is located at a distance from the opening of the burner 32 close to the diameter of the filter.
  • the burner must be subjected to relatively severe operation is made of stainless steel, refractory or ceramic.
  • a thermocouple determining the stopping of the operation of the device for temperatures exceeding a given setpoint, for example 800 ° C.
  • the organic liquid supplied by the pipe 31 arrives in a double-walled envelope 41 and respectively 51, determining the vaporization zone of the liquid and using for this purpose the calories available on the surface of the pot 20.
  • FIGS. 5 and 6 indicate the possibility which exists according to the invention of placing the vaporization, cracking and mixing assembly of the gases coming from the organic liquid on an independent element 50 - 60, attached to the pot 20, this which allows you to change the filter 1 if necessary and to improve the distribution of calories on the surface of the latter.
  • the vaporization of the organic liquid arriving through the pipe 31 is carried out by means of a first candle 70 brought to the temperature of 500 ° C whose tip 71 plunges into a first prechamber 72 in which s accumulates the organic liquid and opened at its upper part so as to allow the evacuation of the vapors obtained.
  • the latter then come into contact with the second spark plug 27 brought to high temperature and disposed in the second prechamber 26 where the cracking of the gas occurs.
  • This arrangement allows the regeneration of the filter 1 from the start of the vehicle, and at idle, even when the surface of the pot 20 is not yet at the temperature allowing the vaporization of the liquid.
  • the filter 81 comprises, unlike those of the preceding representations, a catalytic phase, preferably based on a metal of the platinum or palladium type.
  • cracking gases do not burn directly in the burner unlike the previous examples, because they are not in contact with the additional oxygen at the hot spot 34 of the spark plug 27.
  • additional oxygen at the hot spot 34 of the spark plug 27.
  • openings at the top of nozzle 82 note the absence openings at the top of nozzle 82.
  • the mixing of the cracked gases and the oxygen of the exhaust gases takes place further, at the level of the filter 81; this is where the oxidation occurs, inducing over the entire catalytic surface the increase in temperature necessary (approximately 450 ° C) for the initiation of combustion of the trapped carbon particles.
  • the nozzle 82 is constituted by the extension of the front part 36 of the prechamber 26, which in this case is larger than the spark plug 27, and terminates in the upper part 21 of the pot 20.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Filtering Materials (AREA)
  • Exhaust Gas After Treatment (AREA)

Claims (8)

1. Verfahren zur Regenerierung von Staubfiltern, insbesondere für Dieselmotoren, dadurch gekennzeichnet, daß periodisch stromaufwärts des verstopften Filters eine organische Flüssigkeit eingespritzt wird, wie z.B. Cx Hy 0" vom Typ Ethanol oder Methanol, die eine niedrige Verdampfungstemperatur aufweist, gegebenenfalls mit Wasser versetzt, wobei die organische Flüssigkeit nach Vorwärmung und Aufspalten in ein leicht entzündbares, im wesentlichen aus Wasserstoff und Kohlenoxid bestehendes Gemisch, in die Leitung der ankommenden Abgase eingeführt wird.
2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß die organische Flüssigkeit über eine Leitung (31) in eine Vorkammer (26) eingeführt wird, zur Verdampfung bei Kontakt mit einer Kerze (27) auf Höhe eines Bereichs (35) der letzeren, die eine mittlere Temperatur von etwa 500°C aufweist, danach einen Aufspaltungsbereich hoher Temperatur (800 bis 1000° C) durchsetzt, der vom Abschnitt (38) geringen Durchmessers der Kerze (27) gebildet ist und nach dem Verlassen der Engstelle (36) des vorderen Endes der Vorkammer (26), die sie in geringem Abstand umgibt, einen heißen Punkt (34) erreicht, der vom Ende der Kerze gebildet ist, welche im Inneren des oberen Abschnitts (21) des Auspufftopfes (20) in einen Brenner (32) mündet, der zum Filter (1) hin gekrümmt ist und der an seiner gegenüberliegenden Seite Öffnungen (33) aufweist, die von einem mit Sauerstoff angereicherten Abgasstrom durchsetzt werden, der sich mit den aus der Vorkammer (26) stammenden aufgespaltenen Gasen vermischt, so daß sich die Mischung auf Höhe des heißen Punktes (34) entzündet und damit die zur Oxidation der im Filter (1) eingeschlossenen Staubteilchen (4) erforderliche Wärmemenge darstellt.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die durch die Leitung (31) ankommende organische Flüssigkeit vor ihrem Eintreten in die Verdampfungsvorkammer (26) vorgewärmt wird, indem sie ein doppelwandiges Gehäuse (41 - 51) durchsetzt und damit von der Oberfläche des Auspufftopfes (20) stammende Wärme aufnimmt.
4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß das zur Oberfläche des Filters (1) gerichtete Ende des Brenners (32) aufgeweitet (43) ist.
5. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Gesamtanordnung zum Verdampfen, zum Aufspalten und zum Mischen der von der organischen Flüssigkeit stammenden Gase an einem unabhängigen Bauteil (50 - 60) angeordnet ist, das am Auspufftopf (20) befestigt ist.
6. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Verdampfung der organischen Flüssigkeit stromaufwärts der Vorkammer (26) erfolgt mittels einer ersten Kerze (70), deren Spitze (71) in einer ersten Vorkammer (72) angeordnet ist, in der sich die organische Flüssigkeit ansammelt und deren oberes Ende derart offen ist, daß die entstandenen Dämpfe abgeführt werden können.
7. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß das Filter (1) eine Katalysatorstufe enthält, vorzugsweise auf der Grundlage eines Platin- oder Palladiummetalls und daß der vordere Abschnitt der Vorkammer (26) sich bis jenseits des freien Endes (34) der Kerze (27) bis in den oberen Abschnitt (21) des Auspufftopfes (20) erstreckt und in Richtung des Filters (1) gekrümmt ist um so eine Einlaßdüse (82) für die von der organischen Flüssigkeit stammenden Gase zu bilden und keine Öffnungen aufweist, die es den Abgasen ermöglichen sich mit den vorgenannten Gasen zu vermischen, so daß deren Entzündung vor dem Berühren der katalytischen Oberfläche des Filters (1) verhindert wird, in dem die zu oxidierenden Kohlenstoffteilchen (4) eingeschlossen sind.
8. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß ein zusätzlicher Drucklufteinlaß mittels einer Pumpe vorgesehen ist, deren vorzugsweise automatische Betätigung durch das Abstellen des Motors ausgelöst werden kann.
EP84401194A 1983-06-16 1984-06-12 Regenierung von Staubfilter, insbesondere für Dieselmotoren Expired EP0132166B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84401194T ATE22963T1 (de) 1983-06-16 1984-06-12 Regenierung von staubfilter, insbesondere fuer dieselmotoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8309951 1983-06-16
FR8309951A FR2548264B1 (fr) 1983-06-16 1983-06-16 Regeneration des filtres a particules, notamment pour moteurs diesel

Publications (2)

Publication Number Publication Date
EP0132166A1 EP0132166A1 (de) 1985-01-23
EP0132166B1 true EP0132166B1 (de) 1986-10-15

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EP84401194A Expired EP0132166B1 (de) 1983-06-16 1984-06-12 Regenierung von Staubfilter, insbesondere für Dieselmotoren

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US (1) US4576617A (de)
EP (1) EP0132166B1 (de)
AT (1) ATE22963T1 (de)
DE (1) DE3460999D1 (de)
ES (1) ES8506854A1 (de)
FR (1) FR2548264B1 (de)

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ES533445A0 (es) 1985-08-01
FR2548264A1 (fr) 1985-01-04
EP0132166A1 (de) 1985-01-23
ATE22963T1 (de) 1986-11-15
FR2548264B1 (fr) 1985-12-13
ES8506854A1 (es) 1985-08-01
US4576617A (en) 1986-03-18
DE3460999D1 (en) 1986-11-20

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