EP1752633A1 - Appareil pour la génération de gaz dans un système d'échappement d'un moteur thermique - Google Patents

Appareil pour la génération de gaz dans un système d'échappement d'un moteur thermique Download PDF

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Publication number
EP1752633A1
EP1752633A1 EP06118536A EP06118536A EP1752633A1 EP 1752633 A1 EP1752633 A1 EP 1752633A1 EP 06118536 A EP06118536 A EP 06118536A EP 06118536 A EP06118536 A EP 06118536A EP 1752633 A1 EP1752633 A1 EP 1752633A1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
primary
primary combustion
fuel
engine
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.)
Granted
Application number
EP06118536A
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German (de)
English (en)
Other versions
EP1752633B1 (fr
Inventor
Klaus Dipl.-Ing. Bäumer
Heinrich Prof. Dr.-Ing. Eickhoff
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.)
Deutsches Zentrum fuer Luft und Raumfahrt eV
Original Assignee
Deutsches Zentrum fuer Luft und Raumfahrt eV
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Publication date
Application filed by Deutsches Zentrum fuer Luft und Raumfahrt eV filed Critical Deutsches Zentrum fuer Luft und Raumfahrt eV
Publication of EP1752633A1 publication Critical patent/EP1752633A1/fr
Application granted granted Critical
Publication of EP1752633B1 publication Critical patent/EP1752633B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
    • F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid 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
    • F01N3/02—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
    • F01N3/08—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
    • 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

Definitions

  • the invention relates to a device for producing hot gas in the exhaust line of an internal combustion engine, with a primary combustion chamber, into which a swirl air atomizer nozzle opens, and a secondary combustion chamber, which is connected to an exhaust pipe of the engine.
  • the invention relates to hot gas production for a soot filter device, especially in diesel engines.
  • DE 37 29 861 C2 (DLR ) is a soot filter device is described, which has a main burner with a spray nozzle operated with compressed air to increase the temperature of the engine exhaust.
  • the main combustion chamber containing the main burner opens into a secondary combustion chamber in which the combustion gases mix with the engine exhaust gases.
  • the afterburner chamber burns the previously unburned portion of the fuel together with the oxygen contained in the engine exhaust gas.
  • the compressed air for the Main combustion is supplied in substoichiometric amount, ie in an insufficient for complete combustion of the fuel amount.
  • the afterburning takes place without appropriate burner.
  • the single-stage burner operation means because of the large control range high pressure requirements to promote the compressed air at high burner power.
  • the concept envisages splitting the air into an auxiliary air for atomization and a main air for combustion.
  • the main air is passed around a nozzle via a guide into the combustion chamber.
  • a power control over the primary combustion chamber is therefore possible only within narrow limits. Since not the entire air flow is used for atomization, comparatively high pressures of the compressed air are required.
  • the type of fuel atomization and the shape of the primary combustion chamber causes a limited control range. Therefore, there is a danger that the burner will not maintain its full functionality in the entire load range of the engine.
  • the invention has for its object to provide a device for hot gas production in the exhaust system of an internal combustion engine, which has a reduced pressure requirement and a large control range.
  • the device according to the present invention is defined by claim 1. It is distinguished by the fact that a fuel inlet opens into the exhaust gas flow of the engine and that combustion of the supplied fuel with the oxygen contained in the engine exhaust gases takes place in the secondary combustion chamber.
  • the invention provides for two-stage combustion with active fuel stages.
  • the principle of the primary stage essentially corresponds to that of DE 37 29 861 C2 .
  • a fuel supply is provided in the secondary combustion chamber, which is fed with the exhaust gases of the diesel engine. The combustion takes place in the secondary combustion chamber by utilizing the oxygen contained in the engine exhaust gases.
  • the secondary combustion chamber is arranged in the exhaust pipe, with its exhaust gases are fed to a mixing chamber. In the mixing chamber and the effluent from the primary combustion combustion gases of the primary burner are introduced.
  • the secondary combustion chamber behind the outlet through which the combustion gases of the primary combustion chamber emerge from the latter.
  • the secondary combustion chamber passes into the mixing chamber.
  • a mixer is arranged in the gas flow behind the secondary combustion chamber. This mixer serves to mix the combustion gases of the primary burner with those of the secondary burner and to supply a largely homogeneous gas mixture to a downstream soot filter.
  • the primary combustion chamber may have lateral outflow openings or an outflow opening aligned with the axis of the primary burner.
  • a axially aligned discharge port may be disposed in the flow path of the combustion gases downstream of the discharge port of the secondary burner, which is opposite to the flow path of the combustion gases of the primary combustion chamber.
  • the secondary burner is preferably provided with an evaporator shell, which captures and evaporates the residual fuel entrained by the combustion gases.
  • the evaporator shell also forms a deflection device for deflecting the combustion gases of the secondary burner.
  • the secondary combustion chamber is delimited by an annular wall which has a passage leading to the soot filter.
  • the fuel line of the secondary burner is carried according to a preferred embodiment of the invention of the annular wall which limits the secondary combustion chamber.
  • the fuel line is arranged in the annular wall, so that it is protected against high temperatures.
  • the illustrated apparatus for producing hot gas in the exhaust line of an internal combustion engine is shown here specifically in connection with the soot filter device of a diesel engine.
  • the internal combustion engine consists of the diesel engine whose exhaust gases are purified by the soot filter device become. From time to time, cleaning of the soot filter device by hot gases is required, which burns the accumulated soot.
  • the device described below serves to generate these hot gases.
  • the device of Figure 1 corresponds in its basic structure that of DE 37 29 861 C2 , A soot filter 10 is housed in a cylindrical housing 11, which is flowed through in the longitudinal direction of the engine exhaust.
  • a mixer housing 12 which contains a mixer 13.
  • a combustion chamber housing 14 is located in front of the mixer housing.
  • the primary burner 15 is arranged axially in the combustion chamber housing in the end wall of the combustion chamber housing 14.
  • This has a swirl air atomizing nozzle 16, which swirls the fuel-air mixture and injects it axially into a primary combustion chamber 27.
  • An electrical ignition device 18 serves to ignite the gas mixture, so that in the primary combustion chamber 27, a rotating flame is formed, which starts from the swirl air atomizing nozzle 16.
  • the swirl air atomizing nozzle 16 the fuel is supplied via a fuel line 20. Further, outside air which has been previously compressed is supplied via an air inlet 21.
  • the amount of air and the amount of fuel can be adjusted by levers 22,23.
  • the swirl air atomizing nozzle 16 includes an annular blade. The fuel is sprayed against the cutting edge.
  • the swirling air which is supplied at low pressure of, for example, 20 to 100 mbar, flows past the annular cutting edge and ruptures the fuel film at the cutting edge into drops.
  • the primary combustion chamber 27 is fed all the air through the nozzle. The large air flow allows a low atomizing pressure. This makes a wide range of control possible.
  • the primary combustion chamber 27 has a peripheral wall 17 which extends over at least two-thirds of the length of the primary combustion chamber, from the end wall 24, closed is. In the last third are lateral outflow openings 25.
  • the housing bottom 26 is closed in this embodiment.
  • the primary burner 15 By the described design of the primary burner 15 is achieved in combination with the closed side wall 17, that in the primary combustion chamber, a controlled recirculation of the combustion gases takes place, wherein flow rolls arise. This has the consequence that a high stability range is achieved with different energy states of the primary burner 15. This contributes to the fact that the fuel is intimately mixed with the entirety of the air supplied to the primary burner. The primary burner thus ensures a large power control range, with the result that a stable operation is given in each state of the engine.
  • the space surrounding the primary combustion chamber 27 is connected to a mixing chamber 38. This is bounded by an annular wall 29 which protrudes inwardly from the wall of the mixer housing 12 and has a central passage 30.
  • the fuel supplied through the fuel inlet 35 burns by means of the oxygen contained in the engine exhaust gases in the secondary combustion chamber 28. Additional combustion air is not supplied to the secondary combustion chamber 28.
  • a passage 33 leads to the mixing chamber 38. In the mixing chamber 38, the combustion gases from the primary combustion chamber 27 and the secondary combustion chamber 28 are mixed.
  • the housing 17, which encloses the primary combustion chamber 27, in its housing bottom 26 has a central outflow opening 25a.
  • the secondary combustion chamber 28 In the gas flow behind the outflow opening 25a is the secondary combustion chamber 28 with the fuel inlet 35, which is designed here as a swirl-air atomizing nozzle.
  • the fuel line 36 leading to the fuel inlet 35 is routed through the annular wall 29 so that it is protected from heat from the annular wall.
  • the secondary burner has an arcuate evaporator shell 39 which is spaced from the fuel inlet 35 and serves to vaporize the fuel still contained in the combustion gases.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Incineration Of Waste (AREA)
EP06118536A 2005-08-11 2006-08-07 Appareil pour la génération de gaz chaud dans un système d'échappement d'un moteur thermique Not-in-force EP1752633B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005037969A DE102005037969A1 (de) 2005-08-11 2005-08-11 Vorrichtung zur Heißgaserzeugung im Abgasstrang eines Verbrennungsmotors

Publications (2)

Publication Number Publication Date
EP1752633A1 true EP1752633A1 (fr) 2007-02-14
EP1752633B1 EP1752633B1 (fr) 2009-06-24

Family

ID=37308991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06118536A Not-in-force EP1752633B1 (fr) 2005-08-11 2006-08-07 Appareil pour la génération de gaz chaud dans un système d'échappement d'un moteur thermique

Country Status (3)

Country Link
EP (1) EP1752633B1 (fr)
AT (1) ATE434717T1 (fr)
DE (2) DE102005037969A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9506385B2 (en) 2010-07-15 2016-11-29 Faurecia Emissions Control Technologies, Usa, Llc Fuel fired burner for vehicle exhaust component

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008063515A1 (de) * 2008-12-18 2010-06-24 Deutz Ag Verdampfer
DE102009023550A1 (de) * 2009-05-30 2010-12-09 Deutz Ag Abgasnachbehandlungssystem
CN104564243A (zh) * 2014-12-31 2015-04-29 杭州纯化科技有限公司 柴油发动机dpf低温再生点火器专用直管扰流器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306743A2 (fr) * 1987-09-05 1989-03-15 Deutsches Zentrum für Luft- und Raumfahrt e.V. Procédé de filtrage de suie et filtre de suie pour un moteur diesel
EP0532044A1 (fr) * 1991-09-12 1993-03-17 Firma J. Eberspächer Brûleur pour un filtre à particules de gaz d'échappement d'un moteur diesel
JPH08105608A (ja) * 1994-09-30 1996-04-23 Miura Kenkyusho:Kk 触媒燃焼ボイラ
DE19504183A1 (de) * 1995-02-09 1996-08-14 Eberspaecher J Brenner zur thermischen Regeneration eines Partikelfilters in einem Abgasnachbehandlungssystem eines Verbrennungsmotors, insbesondere Dieselmotors

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3837472C2 (de) * 1988-11-04 1998-09-24 Deutz Ag Partikelfiltersystem
DE4325906C2 (de) * 1993-08-02 1995-08-24 Daimler Benz Ag Vorrichtung zur Regenerierung eines im Abgastrakt einer Brennkraftmaschine eingesezten Partikelfilters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306743A2 (fr) * 1987-09-05 1989-03-15 Deutsches Zentrum für Luft- und Raumfahrt e.V. Procédé de filtrage de suie et filtre de suie pour un moteur diesel
EP0532044A1 (fr) * 1991-09-12 1993-03-17 Firma J. Eberspächer Brûleur pour un filtre à particules de gaz d'échappement d'un moteur diesel
JPH08105608A (ja) * 1994-09-30 1996-04-23 Miura Kenkyusho:Kk 触媒燃焼ボイラ
DE19504183A1 (de) * 1995-02-09 1996-08-14 Eberspaecher J Brenner zur thermischen Regeneration eines Partikelfilters in einem Abgasnachbehandlungssystem eines Verbrennungsmotors, insbesondere Dieselmotors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9506385B2 (en) 2010-07-15 2016-11-29 Faurecia Emissions Control Technologies, Usa, Llc Fuel fired burner for vehicle exhaust component

Also Published As

Publication number Publication date
EP1752633B1 (fr) 2009-06-24
ATE434717T1 (de) 2009-07-15
DE102005037969A1 (de) 2007-02-15
DE502006004051D1 (de) 2009-08-06

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