WO2000032911A1 - Dispositif et procede pour purifier les gaz d'echappement d'un moteur a combustion interne - Google Patents

Dispositif et procede pour purifier les gaz d'echappement d'un moteur a combustion interne Download PDF

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Publication number
WO2000032911A1
WO2000032911A1 PCT/EP1999/008670 EP9908670W WO0032911A1 WO 2000032911 A1 WO2000032911 A1 WO 2000032911A1 EP 9908670 W EP9908670 W EP 9908670W WO 0032911 A1 WO0032911 A1 WO 0032911A1
Authority
WO
WIPO (PCT)
Prior art keywords
particle filter
sections
filter element
nox
storage catalyst
Prior art date
Application number
PCT/EP1999/008670
Other languages
German (de)
English (en)
Inventor
Rolf Bosse
Original Assignee
Volkswagen Aktiengesellschaft
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 Volkswagen Aktiengesellschaft filed Critical Volkswagen Aktiengesellschaft
Publication of WO2000032911A1 publication Critical patent/WO2000032911A1/fr

Links

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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with particulate filters
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
    • F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
    • 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
    • F01N2240/16—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 an electric heater, i.e. a resistance heater
    • 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/04—Sulfur or sulfur oxides

Definitions

  • the invention relates to a device and a method for cleaning the exhaust gas of an internal combustion engine, the cleaning device having a NOx storage catalytic converter and a particle filter.
  • Exhaust gas cleaning devices are known, in particular for diesel injection engines which can be operated in lean operation and which have a NOx storage catalytic converter and an upstream particle filter.
  • the exhaust gas flow brings sulfur to the NOx storage catalytic converter, which was in the fuel used and adversely affects the absorption capacity of the NOx storage catalytic converter.
  • the sulfates formed can be converted again at elevated exhaust gas temperatures.
  • This measure can be carried out in an exhaust gas cleaning device of an internal combustion engine, in which a heating device is provided for heating the NOx storage catalytic converter to a de-sulfation temperature. With such a device, the sulfates formed during the functional operation of the NOx storage catalytic converter can be converted again during a heating-up time interval, so that the poisoning is reversible overall.
  • an electrical heating device can be provided, which can be put into operation by means of a control or regulating device.
  • the invention has for its object to provide a device and a method with which the exhaust gas purification can be carried out with less energy. This object is solved by the features of claim 1 or 12. Preferred embodiments of the invention are the subject of the dependent claims.
  • the device according to the invention for cleaning the exhaust gas of an internal combustion engine with a NOx storage catalyst and particle filter has n> 2 sections, where n is a natural number, and each section has at least one particle filter element and at least one NOx storage catalyst element, the at least one particle filter element and that at least one NOx storage catalyst element are thermally coupled.
  • Each section preferably has exactly one particle filter element and one NOx storage catalytic converter element, it being possible for the sections to be layered or arranged sequentially. Furthermore, the sections can be longitudinal or transverse sections or coaxially inserted parts and can be arranged and / or shaped in segments.
  • Each section preferably has a heating device, wherein each particle filter element (PE) and / or NOx storage catalyst element (KE) can have a separate heating device.
  • an ignition element for example a glow ignition, can be provided for each particle filter element in order to initiate the combustion of the filter particles, which are soot particles, which accumulate in the particle filter element.
  • an electronic control or regulating device can be provided which regulates the heating device of each section or particle filter element and / or NOx storage catalytic converter element and, if present, the ignition elements of the particle filter elements in a specific sequence in each case during a NOx regeneration process.
  • An initiation of the burn-up can also be effected by regulating the heating device of the particle filter element concerned in such a way that the flame temperature of the filter particles is exceeded, the electronic control device preferably switching on the heating devices of the particle filter elements concerned before the initiation of a NOx regeneration process.
  • the device is arranged in a corresponding housing.
  • de-sulfation of at least one section of the device is carried out by causing the filter particles to burn off in the at least one particle filter element of the section.
  • the corresponding particle filter element can be heated to the flame temperature of the filter particles. It is also possible to initiate the erosion via an ignition device. Furthermore, the ignition of the filter particles can be started before the NOx regeneration is initiated.
  • the sections of the cleaning device which are preferably identical in terms of their energy consumption or also structurally identical can be designed so large in terms of their energy consumption that they can be supplied by the vehicle electrical system in each case without problems and without overloading.
  • the sections can be longitudinal or transverse sections, wherein they can only be defined by the space section that can be heated with the associated heating device or by a separate component.
  • Figure 1 shows a first embodiment of the device according to the invention in a perspective and schematic representation.
  • FIG. 2 shows a second embodiment of the device according to the invention in cross-sectional representation
  • Fig. 3 shows a third embodiment of the device according to the invention in
  • the exhaust gas cleaning device or NOx storage catalytic converter is part of an exhaust gas cleaning system (not shown further) and is located in the exhaust gas system of an internal combustion engine, in particular a diesel engine, which is preferably an injection internal combustion engine which is operated with gasoline or diesel fuel can.
  • the catalytic converter 1 is arranged in the flow path of the exhaust gas of the exhaust system, i.e. in its exhaust pipe.
  • the catalyst 1 has several, more precisely at least two sections 1a, 1b,
  • Storage catalyst element KE and at least one particle filter PF are provided.
  • Sections 1a, 1b, 1c can each be heated individually by means of a heating device (not shown), wherein each particle filter element (PF) and each NOx storage catalyst element (KE) can also be provided with a respective separate heating device. Furthermore, the particle filter PF can be arranged upstream or downstream of the storage catalyst element KE in the flow direction 4 of the exhaust gas.
  • Storage catalyst elements KE and particle filter PF can be disc-shaped parts.
  • the one or more storage catalytic converter elements KE and particle filter PF are annular parts which are arranged coaxially surrounding one another in a ring are.
  • the flow direction in the region of the sections 1a, 1b, 1c is directed radially inwards or radially outwards.
  • Cross sections of the storage catalytic converter 1 preferably in the form of segments or pie-shaped cutouts. With this configuration, the direction of flow in the region of the sections 1a, 1b, 1c can be directed in the circumferential direction.
  • the one or more storage catalyst elements KE and particle filter PF should not only be accommodated in one housing (not shown), but should be layered or arranged sequentially, so that a good thermal coupling between the storage catalyst elements KE and the particle filter PF given is.
  • Each particle filter element PF of a section 1a, 1b, 1c can also have one
  • n of preferably identical sections 1a, 1b, 1c is equal to or greater than 2. Two or more, e.g. 16, sections 1a, 1b, 1c may be provided.
  • the heating devices and / or ignition devices are set in operation by a control or regulating device.
  • the heating and / or ignition functions of all sections 1a, 1b, 1c can be put into operation simultaneously or in a specific order.
  • NOx is deposited on the surface of the catalytic converter when the internal combustion engine is lean.
  • a regeneration process of the storage catalytic converter 1 must therefore be carried out at regular intervals, which takes place with reducing, stoichiometric or slightly lean exhaust gas.
  • the storage catalytic converter 1 for the desulfurization of the storage catalytic converter 1, its sections 1a, 1b, 1c are at the same time or at certain time intervals subsequently heated to the desulfation temperature in each case in a NOx regeneration process.
  • the time intervals between these partial de-sulfations are determined such that all sections 1a, 1b, 1c ... and thus the storage catalyst 1 as a whole are desulfurized before its NOx absorption capacity is significantly impaired or fails. Due to the still lower required heating power, an on-board electrical system of the associated vehicle can be used with even lower performance
  • Form storage catalyst 1 after n de-sulfation processes according to the invention, the storage catalyst 1 has been completely heated to the de-sulfation temperature and de-sulfated.
  • the de-sulfation can be carried out at the de-sulfation temperature of the exhaust gas and in a reducing, stoichiometric or slightly lean environment.

Landscapes

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

Abstract

L'invention concerne un dispositif pour purifier les gaz d'échappement d'un moteur à combustion interne, comportant un catalyseur accumulateur de NOx et un filtre à particules. Ce dispositif présente n ≥ 2 parties, n étant un entier naturel. Chaque partie comprend au moins un élément filtre à particules et au moins un élément catalyseur accumulateur de NOx. Le ou les éléments filtres à particules et le ou les éléments catalyseurs accumulateurs de NOx sont couplés thermiquement. De préférence, chaque partie comporte exactement un élément filtre à particules et un élément catalyseur accumulateur de NOx. Les parties ou les éléments filtres à particules et les éléments catalyseurs accumulateurs de NOx sont équipés de dispositifs de chauffage, les éléments filtres à particules pouvant en outre comporter un dispositif d'allumage. La combustion des particules d'un élément filtre à particules provoque un réchauffement de l'élément catalyseur accumulateur de NOx à une température supérieure à la température de désulfatation pendant une phase de régénération.
PCT/EP1999/008670 1998-11-28 1999-11-11 Dispositif et procede pour purifier les gaz d'echappement d'un moteur a combustion interne WO2000032911A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998155092 DE19855092B4 (de) 1998-11-28 1998-11-28 Vorrichtung und Verfahren zum Reinigen des Abgases einer Brennkraftmaschine
DE19855092.8 1998-11-28

Publications (1)

Publication Number Publication Date
WO2000032911A1 true WO2000032911A1 (fr) 2000-06-08

Family

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Family Applications (1)

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PCT/EP1999/008670 WO2000032911A1 (fr) 1998-11-28 1999-11-11 Dispositif et procede pour purifier les gaz d'echappement d'un moteur a combustion interne

Country Status (2)

Country Link
DE (1) DE19855092B4 (fr)
WO (1) WO2000032911A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1069286A3 (fr) * 1999-07-14 2003-05-21 Volkswagen Aktiengesellschaft Dispositif de purification de gaz d'échappement pour un moteur à combustion interne et procédé de régénération de ce dispositif
EP1398069A2 (fr) * 2002-09-16 2004-03-17 Delphi Technologies, Inc. Dispositif de traitement de gaz d'échappement

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3578107B2 (ja) * 2000-07-24 2004-10-20 トヨタ自動車株式会社 排気ガス浄化方法
DE10040554B4 (de) * 2000-08-15 2013-05-02 Daimler Ag Verfahren zum Betrieb einer Abgasreinigungsanlage mit Partikelfilter und Stickoxidspeicher
DE10106769A1 (de) * 2001-02-12 2002-08-14 Ego Elektro Geraetebau Gmbh Abgasfilter mit einer elektrischen Heizeinrichtung und Verfahren zum Abbrennen von Ruß in einem Abgasfilter
WO2002102493A2 (fr) 2001-06-18 2002-12-27 Hjs Fahrzeugtechnik Gmbh & Co. Filtre a particules fonctionnant sur la base de la combustion de suie pour moteurs diesel
DE10128938A1 (de) * 2001-06-18 2003-01-02 Hjs Fahrzeugtechnik Gmbh & Co Verfahren zum Abtrennen von Rußpartikeln in Partikelfiltern, und Partikelfilter hierzu
US8590158B2 (en) 2010-10-29 2013-11-26 Corning Incorporated Methods of making filter apparatus and fabricating a porous ceramic article
US8591622B2 (en) 2010-10-29 2013-11-26 Corning Incorporated Filter apparatus with porous ceramic plates
DE102012104499A1 (de) * 2012-05-24 2013-11-28 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Abgasanlage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1120954A (fr) * 1955-03-18 1956-07-18 Pot d'échappement à fonctions multiples
EP0488105A1 (fr) * 1990-11-26 1992-06-03 The Social Welfare Foundation Hokkaido Rehabily Charbon actif, sa production et son utilisation en adsorption
US5202101A (en) * 1991-03-21 1993-04-13 General Electric Environmental Services Regenerative process and system for the simultaneous removal of particulates and the oxides of sulfur and nitrogen from a gas stream
EP0766993A2 (fr) * 1995-10-02 1997-04-09 Toyota Jidosha Kabushiki Kaisha Filtre pour purifier le gaz d'échappement
WO1998048153A1 (fr) * 1997-04-24 1998-10-29 Toyota Jidosha Kabushiki Kaisha Systeme de gestion d'emissions d'echappement pour moteurs a combustion interne

Family Cites Families (3)

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US5057126A (en) * 1991-02-25 1991-10-15 Lubkowitz Joaquin A Gas chromatography
DE19626836A1 (de) * 1995-07-08 1997-01-09 Volkswagen Ag Dieselbrennkraftmaschine mit NOx-Speicher
DE29808664U1 (de) * 1998-05-15 1998-09-17 Fa. Ing. Wolfgang Mertner Inh. Ing. Kurt Kirscht, 37318 Wahlhausen Filtereinrichtung zum Entfernen von Ruß aus rußhaltigen Gasen, insbesondere aus Abgasen von Diesel-Brennkraftmaschinen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1120954A (fr) * 1955-03-18 1956-07-18 Pot d'échappement à fonctions multiples
EP0488105A1 (fr) * 1990-11-26 1992-06-03 The Social Welfare Foundation Hokkaido Rehabily Charbon actif, sa production et son utilisation en adsorption
US5202101A (en) * 1991-03-21 1993-04-13 General Electric Environmental Services Regenerative process and system for the simultaneous removal of particulates and the oxides of sulfur and nitrogen from a gas stream
EP0766993A2 (fr) * 1995-10-02 1997-04-09 Toyota Jidosha Kabushiki Kaisha Filtre pour purifier le gaz d'échappement
WO1998048153A1 (fr) * 1997-04-24 1998-10-29 Toyota Jidosha Kabushiki Kaisha Systeme de gestion d'emissions d'echappement pour moteurs a combustion interne

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1069286A3 (fr) * 1999-07-14 2003-05-21 Volkswagen Aktiengesellschaft Dispositif de purification de gaz d'échappement pour un moteur à combustion interne et procédé de régénération de ce dispositif
EP1398069A2 (fr) * 2002-09-16 2004-03-17 Delphi Technologies, Inc. Dispositif de traitement de gaz d'échappement
EP1398069A3 (fr) * 2002-09-16 2004-03-31 Delphi Technologies, Inc. Dispositif de traitement de gaz d'échappement
US7189375B2 (en) 2002-09-16 2007-03-13 Delphi Technologies, Inc. Exhaust treatment device

Also Published As

Publication number Publication date
DE19855092B4 (de) 2007-11-29
DE19855092A1 (de) 2000-05-31

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