EP1026373A2 - Dispositif de purification des gaz d'échappement d'un moteur à combustion interne - Google Patents

Dispositif de purification des gaz d'échappement d'un moteur à combustion interne Download PDF

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Publication number
EP1026373A2
EP1026373A2 EP00100868A EP00100868A EP1026373A2 EP 1026373 A2 EP1026373 A2 EP 1026373A2 EP 00100868 A EP00100868 A EP 00100868A EP 00100868 A EP00100868 A EP 00100868A EP 1026373 A2 EP1026373 A2 EP 1026373A2
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
ozone
particle filter
line
exhaust
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Withdrawn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
EP00100868A
Other languages
German (de)
English (en)
Other versions
EP1026373A3 (fr
Inventor
Werner Engeler
Olaf Bechmann
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 AG filed Critical Volkswagen AG
Publication of EP1026373A2 publication Critical patent/EP1026373A2/fr
Publication of EP1026373A3 publication Critical patent/EP1026373A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • F01N3/033—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 in combination with other devices
    • F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel 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
    • F01N3/02—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
    • 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
    • F01N2240/38—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 ozone (O3) generator, e.g. for adding ozone after generation of ozone from air

Definitions

  • the invention relates to a device for cleaning the exhaust gas Internal combustion engine according to the preamble of claim 1.
  • This is preferably a gasoline engine, in particular a diesel engine.
  • the exhaust gases from an internal combustion engine contain pollutants, in particular CO2, HC (Hydrocarbons), N0x and S0x, mainly containing carbon Particles such as soot particles occur in the exhaust gas, which are due to incomplete combustion, especially of diesel internal combustion engines.
  • pollutants in particular CO2
  • HC Hydrocarbons
  • N0x N0x
  • S0x mainly containing carbon Particles such as soot particles occur in the exhaust gas, which are due to incomplete combustion, especially of diesel internal combustion engines.
  • the invention has for its object a device of the aforementioned Type in such a way that the particles ensure good exhaust gas quality can be at least partially eliminated.
  • ozone is transferred from an ozone source to the exhaust gas emitted before the exhaust gas reaches the particle filter.
  • the ozone gets into it due to the exhaust gas flow in the exhaust gas distributed to the particles in the exhaust gas and to the Particle filter on which the filtered particles are collected.
  • the distribution of the Ozone in the exhaust gas can occur automatically through the exhaust gas flow. Because ozone is very is unstable, it reacts almost immediately and completely with the particles. So be already attacked hydrocarbons at low ozone concentrations.
  • the fed Ozone thus promotes burning and acts as e.g. continuous burning aid, the particles in the exhaust gas and the filtered particles, in particular soot particles, completely or partially burned off with ozone.
  • the service life of the Particulate filter significantly increased and the function of the exhaust system improved.
  • At a Complete combustion of the filter particles can increase the service life of the filter Filters are extended so that an interim filter exchange with a new one Filter is not required.
  • the ozone can be generated by means of an ozone source, which is preferably is realized by an ozone generator, the ozone being provided in the Area of the exhaust system is produced with an ozone generator, creating a simple and safe functioning is guaranteed. It is possible one Operating the ozone generator with pure oxygen, however, would then have to be cleaner in the vehicle Oxygen are carried, which raises safety concerns.
  • the ozone source in particular the ozone generator
  • the ozone source or the ozone generator is arranged at a distance from the exhaust pipe. In Both cases result in better distribution and mixing of the ozone in the exhaust gas reached. If there is a supply line, it can be used to promote the a gas pump can be provided in the feed line.
  • the device according to the invention is characterized by a simple and also safe design and function, whereby it can be converted into a Integrate exhaust system or combine with it.
  • an oxygen ion conductor for the ozone generator to provide the oxygen from the incoming air or exhaust gas takes so that the oxygen concentration in the ozone generator is increased. Thereby the efficiency of the ozone generator is increased and the carrying of pure Oxygen can be dispensed with.
  • ozone generators of different designs can be used and function can be used.
  • the ozone generator can, for example, by a UV lamp, a microwave generator or an electrical spark discharge path be formed.
  • the device according to the invention is also suitable for an exhaust system with a Catalyst, especially an oxidation catalyst.
  • a Catalyst especially an oxidation catalyst.
  • Ozone generators of different design and function are proposed through performance, a safe function and an advantageous arrangement as well distinguish a small design and easily on or in a Exhaust line or on or in a supply line opening into the exhaust line let integrated.
  • the exhaust system generally designated 1 comprises one after one Internal combustion engine 3 arranged exhaust pipe 2.
  • a particulate filter 5 is located in the exhaust line 2 arranged, an oxidation catalyst 6 can optionally be arranged upstream, so that the exhaust gas first the oxidation catalyst 6 and then preferably in one Flows through distance a from the latter arranged particle filter 5.
  • the particle filter 5 and the oxidation catalyst 6 are of conventional construction and between Pipe sections 2a, 2b, 2c each arranged in a housing 5a, 6a, which the Form exhaust pipe 2 in front of, between and behind the housings 5a, 6a.
  • An ozone generator 7 is provided which continuously or intermittently ozone generated and emitted to the exhaust gas, specifically on one in the flow direction 4 the particle filter 5 or between the particle filter 5 and the oxidation catalyst 6 dispensing point 8, which is in particular a distance b from the particle filter 5 having.
  • the ozone generator 7 is from the exhaust pipe 2 spaced and thus arranged outside of this, being by a Feed line 9 is connected to the exhaust line 2.
  • the ozone generator 7 can In FIG. 1, a pump, not shown, may be assigned, which may supply and / or supply the ozone Exhaust air 11.12 to the exhaust pipe 2 promotes.
  • FIGS. 2 to 4 in which the same or comparable parts are provided with the same reference numerals, represent different ozone generators represents.
  • the Oxygen concentration uses an oxygen ion conductor 14 on the outside 14a is supplied with fresh air or exhaust gas by means of a pipe 15.
  • the Oxygen ion conductor 14 is the oxygen of the fresh air or the exhaust gas via the Inside 14 b of the ion conductor 14 transported into a chamber 16 so that it there too a high oxygen concentration.
  • a potential is applied to the ion conductor 14 by means of electrical leads 17a, 17b placed, which causes the oxygen transport.
  • the chamber 16 is through a Housing 18 formed.
  • a gas pump 19 in one Gas passage 21 arranged, by means of which the ozone from the Chamber 16 is pumped into the feed line 9 or into the exhaust system 1.
  • the oxygen ion conductor 14 can be an ZrO2 or another oxygen ion conductor with pump voltage.
  • FIG. 2 to 4 each show a special embodiment for a Ozone generator 7, the ozone generator 7 according to FIG. 2 by an infrared lamp 7a, 3 by a microwave generator 7b and FIG. 4 by a electric spark discharge gap 7c is formed.
  • the oxygen ion conductor 14 and the pump 19 can be dispensed with, such as this is shown in FIG. 5.
  • the ozone generator 7 or 7a, 7b, 7c directly in the Exhaust line 2 arranged, each with a UV emitter 7a, for example Microwave emitters 7b and a spark gap 7c are shown.
  • a UV emitter 7a for example Microwave emitters 7b and a spark gap 7c are shown.
  • a small size is achieved.
  • the supply route for the ozone is omitted.
  • the exhaust gas flows from left to right in FIG. 1 through the exhaust pipe 2.
  • the ozone reaches into the exhaust gas stream into which it is distributed and mixed, e.g. automatically due to the Flow and the flow path b between the point 8 and the catalyst 5.
  • recirculated air 12 is used to generate ozone, this has the particle filter supplied ozone or gas enriched with ozone already operating temperature.
  • the exhaust gas flows from left to right in FIG. 1 through the exhaust pipe 2.
  • the ozone reaches the junction 8a into the exhaust gas stream into which it is distributed and mixed, e.g. automatically due to the Flow and the flow path b between the discharge point 8a and Particle filter 5.
  • the invention is based on the knowledge that an ozone addition to the Exhaust gas promotes the combustion of the particles, especially soot particles. Doing so the combustion performance of the ozone according to the ratio in which it is Exhaust gas is added.
  • the ozone therefore preferably passes with the exhaust gas continuously to the particle filter 5, in the area of which the filter particles are partially or completely be burned down continuously.
  • the ozone proves to be a burning aid.
  • the generation or supply of the ozone can be carried out continuously or be carried out discontinuously.
  • the latter can be done by a not shown Control device, in particular the existing electronic control device Switch on and switch off, e.g. by switching on and off each of the circuit of the UV lamp 7a, the ion conductor 14, the Microwave generator 7b and / or the spark discharge path 7c.
EP00100868A 1999-02-02 2000-01-18 Dispositif de purification des gaz d'échappement d'un moteur à combustion interne Withdrawn EP1026373A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904068 1999-02-02
DE1999104068 DE19904068A1 (de) 1999-02-02 1999-02-02 Vorrichtung zur Reinigung des Abgases einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP1026373A2 true EP1026373A2 (fr) 2000-08-09
EP1026373A3 EP1026373A3 (fr) 2003-07-09

Family

ID=7896125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00100868A Withdrawn EP1026373A3 (fr) 1999-02-02 2000-01-18 Dispositif de purification des gaz d'échappement d'un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP1026373A3 (fr)
DE (1) DE19904068A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003002853A3 (fr) * 2001-06-26 2003-04-03 Forschungszentrum Juelich Gmbh Filtre a particules diesel contenant un catalyseur a particules diesel finement disperse
FR2859240A1 (fr) 2003-09-02 2005-03-04 Renault Sa Procede de traitement d'un filtre a particules pour l'epuration de gaz d'echappement d'un moteur a combustion et dispositif de traitement d'un filtre a particules
WO2006135073A1 (fr) * 2005-06-17 2006-12-21 Toyota Jidosha Kabushiki Kaisha Systeme de purification de gaz d'echappement utilisant de l'ozone
WO2007032564A1 (fr) * 2005-09-16 2007-03-22 Toyota Jidosha Kabushiki Kaisha Systeme d'epuration de gaz d'echappement pour moteur a combustion interne
WO2007142355A1 (fr) * 2006-06-09 2007-12-13 Toyota Jidosha Kabushiki Kaisha Dispositif de purification de gaz d'échappement

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10142800A1 (de) 2001-08-31 2003-03-20 Bosch Gmbh Robert Vorrichtung und Verfahren zur Abgasnachbehandlung
DE10345986A1 (de) * 2003-09-26 2005-04-28 Iav Gmbh Abgasanlage mit Katalysatoreinrichtung und einem dieser nachgeschalteten Rußfilter für Verbrennungsmotoren
JP4270224B2 (ja) * 2005-11-09 2009-05-27 トヨタ自動車株式会社 内燃機関の排気浄化装置
FR2907845B1 (fr) * 2006-10-31 2008-12-26 Renault Sas Ligne d'echappement d'un moteur diesel et procede de regeneration d'un filtre a particules
DE102007062249A1 (de) * 2007-12-21 2009-06-25 Robert Bosch Gmbh Katalysator zur Behandlung von Verbrennungsabgasen

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JPS5730524A (en) * 1980-07-30 1982-02-18 Tsuchiya Mfg Co Ltd Treatment of fine particles in exhaust gas
DE3440689A1 (de) * 1984-11-07 1986-05-15 Siemens AG, 1000 Berlin und 8000 München Verfahren zum vermindern von schadstoffen in auspuffgasen von kraftfahrzeugen
JPH0650128A (ja) * 1991-02-07 1994-02-22 Tetsuo Wada 排気ガスの中和器
JPH07305622A (ja) * 1994-05-10 1995-11-21 San Chem Kk 内燃機関の排気ガス浄化装置
US5806305A (en) * 1994-05-18 1998-09-15 Lockheed Martin Corporation Method and apparatus for reducing pollutants
JP3899534B2 (ja) * 1995-08-14 2007-03-28 トヨタ自動車株式会社 ディーゼル機関の排気浄化方法
CA2292949A1 (fr) * 1998-04-06 1999-10-14 Lead Industry Company Ltd. Systeme d'elimination des particules emises dans les gaz d'echappement et dispositif antipollution pour gaz d'echappement
DE19900967A1 (de) * 1999-01-13 2000-07-20 Volkswagen Ag Vorrichtung zur Reinigung des Abgases einer Brennkraftmaschine

Non-Patent Citations (1)

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Title
None

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003002853A3 (fr) * 2001-06-26 2003-04-03 Forschungszentrum Juelich Gmbh Filtre a particules diesel contenant un catalyseur a particules diesel finement disperse
US7666376B2 (en) 2001-06-26 2010-02-23 Forschungszentrum Julich Diesel particulate filter comprising a finely dispersed diesel particulate catalyst
FR2859240A1 (fr) 2003-09-02 2005-03-04 Renault Sa Procede de traitement d'un filtre a particules pour l'epuration de gaz d'echappement d'un moteur a combustion et dispositif de traitement d'un filtre a particules
WO2006135073A1 (fr) * 2005-06-17 2006-12-21 Toyota Jidosha Kabushiki Kaisha Systeme de purification de gaz d'echappement utilisant de l'ozone
KR100895690B1 (ko) 2005-06-17 2009-04-30 도요타 지도샤（주） 오존을 이용한 배기가스정화시스템
CN101227963B (zh) * 2005-06-17 2011-05-18 丰田自动车株式会社 利用臭氧的排气净化系统
US8051643B2 (en) 2005-06-17 2011-11-08 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification system utilizing ozone
WO2007032564A1 (fr) * 2005-09-16 2007-03-22 Toyota Jidosha Kabushiki Kaisha Systeme d'epuration de gaz d'echappement pour moteur a combustion interne
WO2007142355A1 (fr) * 2006-06-09 2007-12-13 Toyota Jidosha Kabushiki Kaisha Dispositif de purification de gaz d'échappement
JP2007327460A (ja) * 2006-06-09 2007-12-20 Toyota Central Res & Dev Lab Inc 排ガス浄化装置
US8484952B2 (en) 2006-06-09 2013-07-16 Toyota Jidosha Kabushiki Kaisha Device for purification of exhaust gas

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Publication number Publication date
DE19904068A1 (de) 2000-08-03
EP1026373A3 (fr) 2003-07-09

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