WO2009127298A1 - Elément de purification des gaz d'échappement et moteur à combustion interne avec élément de purification des gaz d’échappement - Google Patents

Elément de purification des gaz d'échappement et moteur à combustion interne avec élément de purification des gaz d’échappement Download PDF

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Publication number
WO2009127298A1
WO2009127298A1 PCT/EP2009/001696 EP2009001696W WO2009127298A1 WO 2009127298 A1 WO2009127298 A1 WO 2009127298A1 EP 2009001696 W EP2009001696 W EP 2009001696W WO 2009127298 A1 WO2009127298 A1 WO 2009127298A1
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WO
WIPO (PCT)
Prior art keywords
exhaust gas
gas purification
exhaust
internal combustion
flow channels
Prior art date
Application number
PCT/EP2009/001696
Other languages
German (de)
English (en)
Inventor
Ronny Meissner
Günter Wenninger
Original Assignee
Daimler 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 Daimler Ag filed Critical Daimler Ag
Publication of WO2009127298A1 publication Critical patent/WO2009127298A1/fr

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Classifications

    • B01J35/56—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
    • 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
    • F01N3/101—Three-way catalysts
    • 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
    • F01N3/103—Oxidation catalysts for HC and CO only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/01—Engine exhaust gases
    • B01D2258/012—Diesel engines and lean burn gasoline engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0215—Coating
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/06—Exhaust treating devices having provisions not otherwise provided for for improving exhaust evacuation or circulation, or reducing back-pressure
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
    • F01N2510/0682—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having a discontinuous, uneven or partially overlapping coating of catalytic material, e.g. higher amount of material upstream than downstream or vice versa
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
    • F01N2510/0684—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having more than one coating layer, e.g. multi-layered coatings
    • 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
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • 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 ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to an exhaust gas purification body in honeycomb body design according to the preamble of claim 1 and an internal combustion engine with an exhaust gas purification system, which has a corresponding exhaust gas purification body.
  • an exhaust gas cleaning body in honeycomb construction with a plurality of mutually parallel, slender and straight running flow channels is known, extending from an end face of the exhaust gas cleaning body to one of the inlet side opposite end outlet side of the exhaust gas purification body. Directly adjacent flow channels are separated from one another by porous, gas-permeable walls.
  • the exhaust gas purification body serves as a particle filter for filtering out particulate constituents, in particular of soot particles from the exhaust gas of diesel engines.
  • the flow channels are mutually closed gastight at the inlet side and at the outlet end. In this way, inlet channels and outlet channels are formed.
  • the object of the invention is to provide an exhaust gas purification component with a particle number reducing exhaust gas cleaning effect, which has an improved exhaust gas backpressure behavior. Another object is to provide an internal combustion engine with an emission control system, in which a low-emission as possible low-emission cleaning with particle reduction is possible.
  • the exhaust gas purification body according to the invention is characterized in that a first part of the flow channels on the inlet side closed gas-impermeable and otherwise formed to flow freely to the outlet side and a second part of the flow channels from the inlet side to the outlet side is continuously through-flow or formed that a first part of the Flow channels on the outlet side gas-impermeable 29los ⁇ sen and otherwise formed free to flow through to the inlet side and a second part of the flow channels from the inlet side to the outlet side is designed to be continuously through-flow.
  • the first part of at the side or closed at the outlet side flow channels can also be zero.
  • the second part of continuously freely flowable flow channels is always different from zero.
  • the exhaust gas cleaning body according to the invention shows, despite the proportion of consistently freely flow-through channels, a surprisingly high effect in terms of filtering out of particles. It is advantageously applicable to internal combustion engines, which have a lower particle content in the exhaust gas compared to conventional diesel internal combustion engines.
  • the exhaust gas cleaning body according to the invention is advantageously applicable to internal combustion engines with a particle untreated emissions of less than 25 mg per km and particularly preferred in internal combustion engines with a raw particle emission of less than 10 mg per km or less.
  • an embodiment may be advantageous in which all the flow channels of the exhaust gas cleaning body are continuously formed through from the inlet side to the outlet side.
  • the cross section of the flow channels can be formed as a regular triangle, square, pentagon, hexagon, heptagon or octagon, with different embodiments are possible in one and the same emission control body. Preferred is a square cross-section for all flow channels.
  • the exhaust gas purification body itself is preferably cylindrical, with a square, in particular square, oval or round cross section.
  • the particulate content in the exhaust gas is markedly lower, typically by a factor of 10 to 100 than at Diesel engines, which typically emit more than about 20 mg of particles per km. Nevertheless, even with these spark-ignited internal combustion engines, in particular with direct fuel injection, there may be a need to reduce the particulate content in the exhaust gas. Especially in these cases, the exhaust gas purification body according to the invention is particularly advantageous applicable.
  • the exhaust back pressure is low, on the other hand, as has been found in relevant investigations, the filtering effect sufficient to significantly reduce the particulate content in the exhaust of these engines, for example, less than 5 mg per km, 1 mg per km or even less.
  • an application for the purification of exhaust gas is particularly preferred if the particles present in the exhaust gas predominantly have an aerodynamic diameter or mobility diameter of less than 100 nm, in particular less than 50 nm.
  • the pore size of the walls is predominantly between 1 .mu.m and 50 .mu.m, in particular predominantly between 5 .mu.m and 20 .mu.m.
  • the numerical values mentioned here refer to the maximum of a typically existing statistical frequency distribution of the pore size.
  • a pore size with an average of between 5 ⁇ m and 20 ⁇ m has been found to be particularly effective at reducing particulate emissions when exhaust gases are present which have a particle content of less than 5 mg per km and a particle diameter of less than 100 nm, especially less than 5o nm on average.
  • the cell density of the flow channels of the exhaust gas purification body is between 100 cpsi and 400 cpsi and the wall thickness between 0.1 mm and 0.5 mm.
  • the commonly used size cpsi (cells per square-inch) for the cell density is as Number of cells formed by the flow channels per unit area of the cross-sectional area of the exhaust gas purification body to understand. 200 cpsi corresponds to about 31 cells per cm 2 .
  • a good mechanical stability and, on the other hand, a high wall surface can be achieved with simultaneously satisfactory exhaust gas counterpressure behavior in the aforementioned ranges of values.
  • Preferred for the purification of exhaust gases with a particle content of less than 5 mg per km and / or a particle diameter of less than 50 nm are comparatively high cell densities of more than 200 cpsi.
  • the walls of the flow channels have a catalytically active coating, in particular of the type of a three-way catalyst, a nitrogen oxide storage catalyst, an SCR catalyst or an oxidation catalyst.
  • a catalytically active coating in particular of the type of a three-way catalyst, a nitrogen oxide storage catalyst, an SCR catalyst or an oxidation catalyst.
  • the exhaust gas purification body has a structure made of a ceramic material, in particular ⁇ on SiC, cordierite, mullite or Aluminiumtitanat- base.
  • the materials mentioned are toughdehnungsver ⁇ holding particularly well suited in particular ⁇ due to their temperature resistance and their for use in exhaust systems of internal combustion engines.
  • Another aspect of the invention relates to a Brennkraftma ⁇ machine with an exhaust gas purification system for purifying exhaust gas, which is discharged from the internal combustion engine, the characterized in that the exhaust gas purification system comprises an exhaust gas purification body according to one of claims 1 to 5.
  • the internal combustion engine is designed as a spark-ignition internal combustion engine with direct fuel injection, in particular as a spark-ignited internal combustion engine of the type of lean-burn, direct-injection gasoline engine.
  • Direct-injection spark-ignited internal combustion engines typically have a higher particulate content in the exhaust gas than is the case with non-direct-injection gasoline engines.
  • the particle content is typically many times lower than diesel engines, there may still be a need to reduce particulate content.
  • an exhaust gas cleaning body of the type described above is used according to the invention. As a result, a significant reduction of the particle content in the exhaust gas is made possible with low exhaust back pressure.
  • a cleaning function with respect to gaseous pollutant components in the exhaust gas such as carbon monoxide, hydrocarbon and / or nitrogen oxide is possible.
  • Another aspect of the invention relates to the use of an exhaust gas cleaning body according to one of claims 1 to 5 for reducing a particle content in the exhaust gas of a motor ⁇ vehicle internal combustion engine, which emits an exhaust gas with a particle content of less than 20 mg per km of driving distance in the majority of its operating range ,
  • 1 is a schematic representation of an internal combustion engine with connected emission control system
  • Fig. 2 is a schematic sectional view of a first advantageous embodiment of the exhaust gas purification body according to the invention.
  • Fig. 3 is a schematic sectional view of a second advantageous embodiment of the exhaust gas purification body according to the invention.
  • the internal combustion engine 1 shows an internal combustion engine 1 with a connected exhaust gas purification system 2.
  • the internal combustion engine 1 is of the type of a direct-injection, lean-burnable gasoline engine with 4 cylinders exemplarily here.
  • the exhaust gas of the internal combustion engine is supplied via an exhaust pipe 3 of the exhaust gas purification system 2 to an exhaust gas purification component 4, which contains an exhaust gas purification body 5 described in greater detail below.
  • an exhaust gas purification component 4 which contains an exhaust gas purification body 5 described in greater detail below.
  • further components which are or are provided for operating the internal combustion engine 1 and the exhaust gas purification system 2 are provided can not be drawn. It is understood, however, that the exhaust gas purification system 2 may comprise further components, such as sensors and catalysts, which are upstream and / or downstream of the exhaust gas purification component 4.
  • the spark-ignited direct injection internal combustion engine 1 is designed such that it typically emits an exhaust gas with a particle content of less than 20 mg per km of driving distance of the associated motor vehicle. Furthermore, the internal combustion engine 1 typically emits a particulate exhaust gas, wherein the size of the particles has a frequency distribution with a maximum at a diameter of less than 50 nm.
  • the exhaust gas purification body 5 used for exhaust gas purification of the internal combustion engine 1 is shown schematically in longitudinal section.
  • the exhaust gas purification body 5 has from an end-side inlet side 10 to an opposite end-side outlet side 11 extending slender and straight flow channels 6a, ⁇ b.
  • the flow channels 6a, 6b extend parallel to one another, with adjacent flow channels being separated from one another by porous, gas-permeable walls 7.
  • the thickness of the walls 7 is preferably in the range of 0.2 mm and 0.4 mm.
  • the porosity is preferably between 30% and 70%, with a mean pore size between 1 .mu.m and 50 .mu.m being preferred.
  • the walls 7 are preferably formed similarly porous by ⁇ going.
  • the flow channels 6a, 6b have a square cross-section which remains constant over their length, wherein other cross-sectional shapes are likewise possible.
  • the cell density is preferably between 100 cpsi and 400 cpsi. Particularly preferred is a cell density of about 200 cpsi corresponding to about 31 cells per cm 2 .
  • the exhaust gas purification body 5 has a cylindrical shape with a preferably constant over the length square cross-section, other cross-sectional shapes are of course possible. Furthermore, the exhaust gas purification body 5 can also be constructed of a plurality of similar segments arranged in rows and columns according to the form shown in Fig. 2, wherein the segments abut each other and are preferably connected to a ceramic adhesive.
  • a first part of the flow channels 6a, 6b is provided with a gas-impermeable sealing plug 8 on the front-side outlet side 11. Apart from the plug 8 they are seen through their other axial course formed freely flowed through and thus open at the inlet side 10. On the other hand, the remaining second part of the flow channels ⁇ a, 6b is completely free of closure means and can be freely flowed through from the inlet side 10 to the outlet side 11.
  • the first part of the closed end flow channels 6a and the second part of the continuously open flow channels 6b of the exhaust gas cleaning body 5 are approximately equal in number.
  • the first part and the second part can also be numerically more or less different ⁇ lich chosen to tailor exhaust back pressure behavior and filter ⁇ effect on each other.
  • ⁇ it may be sufficient, only one small proportion of about 20% of the total existing flow channels 6a, 6b form closed at the end. In extreme cases, all the flow channels can be formed as open flow channels 6b.
  • a catalytic effective coating 9 is preferably provided to apply to the walls 7 of some or all of the flow channels 6a, 6b.
  • the catalytic coating 9 is provided, for example, only on the walls 7 of the flow channels 6a closed on the outlet side.
  • the catalytic coating 9 is preferably continuous on the walls 7 of the respective flow channels and is itself gas permeable.
  • the catalytic coating 9 can be in the form of a three-way catalyst coating, an oxidation-catalytically active coating, a selective SCR catalyst coating with respect to a reduction in nitrogen oxide oxide oxide oxide or in the manner of a nitrogen oxide storage catalyst coating in its usual customary manner known to those skilled in the art and expression be formed.
  • a radial stratification of different coating forms may also be advantageous, whereby a combined effect is made possible.
  • a nitrogen oxide storage catalyst coating can be applied to an SCR catalyst coating or, conversely, an SCR catalyst coating can be applied to a nitrogen oxide storage catalyst coating.
  • a partially differently formed in the axial direction sections coating is also possible. In this way, an exhaust gas purification component with combined catalytic and filter effective function is formed.
  • FIG. 3 a second preferred embodiment of the exhaust gas purification of the internal combustion engine 1 used Abgasrei ⁇ n Trents stressess 5 is shown schematically in longitudinal section.
  • the Fig. 3 illustrated embodiment differs from that of FIG. 2, characterized in that for the end gas-impermeably sealed flow channels 6a of the sealing plug is provided at the inlet side 10. Otherwise, the exhaust gas purification body 5 can be formed according to FIG. 3 analogously to the embodiment explained in connection with FIG. 2.
  • an exhaust gas cleaning body 5 compared to the conventional construction of wall-flow particle filters with mutually closed front and rear flow channels a reduced filter effect.
  • this is sufficient, especially when applied to exhaust gas having a comparatively low particle content of about 20 mg per km of travel or less and / or exhaust gases with comparatively small particles (electrical diameter of about 100 nm or smaller) to achieve significant particulate reduction ,
  • a risk of clogging is virtually absent and the exhaust gas back pressure is greatly reduced in an advantageous manner.

Abstract

L’invention concerne un élément de purification des gaz d’échappement et un moteur à combustion interne avec un élément de purification des gaz d’échappement. L’élément de purification des gaz d’échappement (5) présente une configuration en nid-d’abeilles avec une multitude de minces canaux de circulation parallèles les uns aux autres et rectilignes (6a, 6b), qui s’étendent entre un côté d'entrée (10) de l'élément de purification (5) et un côté de sortie (11) de l'élément de purification (5), des canaux de circulation directement adjacents étant séparés les uns des autres par des parois poreuses perméables aux gaz (7). Selon l’invention, une première partie des canaux de circulation (6a, 6b) est réalisée afin d’être fermée, de manière étanche aux gaz, du côté d'entrée (10) ou du côté de sortie (11), et afin de permettre par ailleurs une circulation libre. Une deuxième partie des canaux de circulation (6a, 6b) est réalisée de manière à permettre une circulation libre de bout en bout, du côté d’entrée (10) au côté de sortie (11). L’élément de purification des gaz d’échappement selon l’invention (5) peut être avantageusement utilisé pour une épuration des gaz d’échappement réduisant les particules pour des moteurs à combustion interne à injection directe à allumage par étincelle.
PCT/EP2009/001696 2008-04-19 2009-03-10 Elément de purification des gaz d'échappement et moteur à combustion interne avec élément de purification des gaz d’échappement WO2009127298A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008019814A DE102008019814A1 (de) 2008-04-19 2008-04-19 Abgasreinigungskörper und Brennkraftmaschine mit Abgasreinigungskörper
DE102008019814.5 2008-04-19

Publications (1)

Publication Number Publication Date
WO2009127298A1 true WO2009127298A1 (fr) 2009-10-22

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DE (1) DE102008019814A1 (fr)
WO (1) WO2009127298A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012067567A1 (fr) * 2010-11-16 2012-05-24 Scania Cv Ab Filtre à particules pour un système d'échappement d'un moteur à combustion

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2964413B1 (fr) * 2010-09-02 2016-07-01 Peugeot Citroen Automobiles Sa Filtre a particules a trois revetements catalytiques
PL2597279T3 (pl) 2011-11-22 2022-04-04 Deutz Aktiengesellschaft Urządzenie i sposób oczyszczania gazów spalinowych z silników Diesla

Citations (4)

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Publication number Priority date Publication date Assignee Title
EP1300193A1 (fr) * 2001-10-06 2003-04-09 OMG AG & Co. KG Procédé et dispositif pour la conversion des pollutants gaz eux contenus dans le gaz d'échappement des moteurs thermiques
US20050008548A1 (en) * 2003-07-08 2005-01-13 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification device for engine
US20070048494A1 (en) * 2005-08-31 2007-03-01 Ngk Insulators, Ltd. Honeycomb structure and honeycomb catalytic body
US20070224093A1 (en) * 2006-03-24 2007-09-27 Ngk Insulators, Ltd. Exhaust gas purifying system

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
US4276071A (en) 1979-12-03 1981-06-30 General Motors Corporation Ceramic filters for diesel exhaust particulates

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1300193A1 (fr) * 2001-10-06 2003-04-09 OMG AG & Co. KG Procédé et dispositif pour la conversion des pollutants gaz eux contenus dans le gaz d'échappement des moteurs thermiques
US20050008548A1 (en) * 2003-07-08 2005-01-13 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification device for engine
US20070048494A1 (en) * 2005-08-31 2007-03-01 Ngk Insulators, Ltd. Honeycomb structure and honeycomb catalytic body
US20070224093A1 (en) * 2006-03-24 2007-09-27 Ngk Insulators, Ltd. Exhaust gas purifying system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012067567A1 (fr) * 2010-11-16 2012-05-24 Scania Cv Ab Filtre à particules pour un système d'échappement d'un moteur à combustion

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