[go: up one dir, main page]

US20040074231A1 - Exhaust system - Google Patents

Exhaust system Download PDF

Info

Publication number
US20040074231A1
US20040074231A1 US10/685,066 US68506603A US2004074231A1 US 20040074231 A1 US20040074231 A1 US 20040074231A1 US 68506603 A US68506603 A US 68506603A US 2004074231 A1 US2004074231 A1 US 2004074231A1
Authority
US
United States
Prior art keywords
catalytic converter
exhaust system
particulate trap
internal combustion
combustion 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.)
Abandoned
Application number
US10/685,066
Other languages
English (en)
Inventor
Rolf Bruck
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.)
Individual
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7681394&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20040074231(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of US20040074231A1 publication Critical patent/US20040074231A1/en
Priority to US10/912,302 priority Critical patent/US8166750B2/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F01N3/2821—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates the support being provided with means to enhance the mixing process inside the converter, e.g. sheets, plates or foils with protrusions or projections to create turbulence
    • 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
    • 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
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9431—Processes characterised by a specific device
    • 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
    • B01D53/9459—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts
    • B01D53/9477—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts with catalysts positioned on separate bricks, e.g. exhaust systems
    • 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
    • F01N3/022—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B01D2255/903—Multi-zoned catalysts
    • B01D2255/9035—Three zones
    • 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
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/38—Honeycomb supports characterised by their structural details flow channels with means to enhance flow mixing,(e.g. protrusions or projections)
    • 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
    • F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the exhaust apparatus; Spatial arrangements of exhaust apparatuses
    • F01N2340/02—Distance of the exhaust apparatus to the engine or between two exhaust apparatuses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/30—Exhaust treatment

Definitions

  • the present invention relates to an exhaust gas system for purifying an exhaust gas from an internal combustion engine, in particular for purifying exhaust gases from a diesel engine of an automobile.
  • Those pollutants are preferably stored until a downstream catalytic converter has reached its operating temperature.
  • particulate traps or particulate filters are used, which collect carbon-based particulates contained in the exhaust gas.
  • the collected particulates are converted continuously or discontinuously, for example by supplying a high level of thermal energy.
  • an object of the invention to provide an exhaust system for purifying exhaust gas from an internal combustion engine, in particular for purifying exhaust gases from a diesel engine of an automobile, which overcomes the hereinafore-mentioned disadvantages of the heretofore-known devices of this general type and which ensures particularly effective conversion of pollutants that are present in the exhaust gas, ensuring continuous regeneration of a particulate trap disposed in the exhaust system.
  • an exhaust system for purifying or cleaning exhaust gas from an internal combustion engine in particular from a diesel engine of an automobile, which can flow through the exhaust system in a preferred flow direction in order to be purified.
  • the exhaust system includes the following successive components, as seen in the flow direction:
  • a catalytic converter in particular for converting carbon monoxides and hydrocarbons contained in the exhaust gas
  • the upstream catalytic converter is used in particular to convert carbon monoxides and hydrocarbons.
  • the overall carbon monoxide content in the exhaust gas from diesel engines is relatively low and only increases relatively strongly as it approaches the particulate limit. This is caused in particular by the generally lean operating strategy (with excess air) of the diesel engine with a view to fuel consumption.
  • high levels of hydrocarbons are caused, for example, in excessively lean fuel/air mixture ranges, and these cannot be converted in time at low temperatures in the combustion chamber (in partial-load mode).
  • An increase in the hydrocarbon contents in the exhaust gas is also present in the event of temporarily very rich combustion (with a deficit of air).
  • the catalytic converter in particular when it is disposed close to the engine, preferably converts very specific pollutants contained in the exhaust gas (in particular carbon monoxide and unsaturated hydrocarbons). These processes take place quickly and virtually completely due to the high temperatures in the vicinity of the engine.
  • the oxidation catalytic converter disposed downstream is used in particular to convert nitrogen oxides which are still present in the exhaust gas, due to the fact that the catalytic converter has already converted the majority of the carbon monoxides and unsaturated hydrocarbons.
  • the nitrogen dioxide content in the exhaust gas is usually between 5 and 15%.
  • the oxidation catalytic converter thus has a catalytically active coating, which converts the nitrogen monoxides into nitrogen dioxides.
  • Particulates in particular carbon-based particulates, are present in the exhaust gas when the fuel is burnt with an extreme deficit of air and, due to the locally very inhomogeneous fuel-air mixture, are typical of combustion in the diesel engine.
  • the particulates usually tend to be deposited at the coatings of the components and/or at the outer wall, such as for example in the exhaust section, of the exhaust system. Then, in the event of load changes, they are expelled in the form of a cloud of particulates. As a result of diffusion and adsorption phenomena, these particulates are retained and continuously chemically converted by the particulate trap, which according to the invention is disposed downstream.
  • a turbocharger In accordance with another feature of the invention, there is provided a turbocharger.
  • the catalytic converter is disposed upstream of the turbocharger, and the oxidation catalytic converter is disposed downstream of the turbocharger, as seen in the flow direction.
  • Turbocharging is a way of increasing the power of an internal combustion engine, which is used in particular in conjunction with diesel engines.
  • a work-performing machine compresses the air required for the engine combustion process, so that a greater mass of air passes into the cylinder or combustion chamber per cycle of the internal combustion engine.
  • the compressor is driven, for example, by a turbocharger which utilizes the energy of the exhaust gas.
  • the coupling to the engine is not mechanical in this case, but rather purely thermal, and in the automotive industry it is primarily the principle of ram charging which is employed. Placing the catalytic converter upstream of a turbocharger of this nature ensures that the operating temperature of the catalytic converter is reached very quickly, since in this way dissipation of heat from the exhaust gas as a result of contact with components of the turbocharger is avoided. Moreover, this ensures that the catalytic converter is disposed close to the engine. In this context, it is particularly advantageous for the catalytic converter to be directly connected to the internal combustion engine and in particular to be disposed in an exhaust manifold.
  • the oxidation catalytic converter has at least two zones.
  • the zone which is furthest away from the internal combustion engine is constructed with a higher specific heat capacity than the others of the at least two zones.
  • the oxidation catalytic converter usually has a honeycomb structure, in which case partitions form passages through which an exhaust gas can flow.
  • the increase in the specific heat capacity (in particular the surface area-specific heat capacity) can be ensured, for example, by making the partitions thicker.
  • the partitions in the upstream zone of the oxidation catalytic converter have a thickness of less than 0.03 mm
  • the partitions in a central zone have a thickness of approximately 0.03 to 0.06 mm
  • a downstream zone is constructed, for example, with a partition thickness of at least 0.08 mm.
  • the number of zones and the thickness of the partitions is to be oriented in particular to the specific composition of the exhaust gas and its thermal energy.
  • the increase in the specific heat capacity in the flow direction means that the oxidation catalytic converter in upstream zones reaches its operating temperature at a very early stage, with the catalytic reaction which is induced there delivering sufficient exothermic energy for the downstream zones likewise to be heated rapidly.
  • the zone with the high heat capacity represents a type of heat storage device even after the internal combustion engine has been switched off, so that, for example, the cold-start phase after a restart is significantly shortened.
  • the particulate trap is disposed directly downstream of the oxidation catalytic converter, preferably at a distance of less than 50 mm, in particular even less than 20 mm, as seen in the flow direction. If the exhaust system is configured in this way, it is particularly advantageous to accommodate the oxidation catalytic converter and the particulate trap in a common housing. In this context, preference is given to an embodiment in which the oxidation catalytic converter is integrated in the particulate trap and the particulate trap preferably has a catalytically active coating. This allows a particularly space-saving configuration of oxidation catalytic converter and particulate trap, which is important especially with a view toward placing the exhaust system close to the engine.
  • the particulate trap has an overall volume (walls plus cavities) of less than 75% of a volumetric capacity of the internal combustion engine, in particular less than 50% and preferably even less than 25%.
  • the overall volume is to be understood as meaning the sum of the volumes of the cylinders or combustion chambers of the internal combustion engine in which the combustion of the fuel takes place.
  • the particulate trap therefore has a very small overall volume, which on one hand ensures a space-saving configuration and on the other hand ensures effective chemical conversion of the particulates.
  • the particulate trap may in particular be constructed to be this small due to the fact that the upstream oxidation catalytic converter produces so much nitrogen dioxide that continuous regeneration of the particulate trap is ensured and there is no need for a large storage volume for carbon-based particulates which are yet to be converted.
  • the particulate trap it is particularly advantageous for the particulate trap to have freely accessible passages in which turbulence points and calming points and/or diverter devices are disposed.
  • This increases the probability of particulates reacting with nitrogen oxide in a simple way by lengthening the residence time of particulates (in particular carbon-based particulates) in the particulate trap. This is achieved, in the case of flow paths which are inherently freely accessible, by having a sufficient number of turbulence and calming points and/or diversions, promoting the deposition of the particulates at the walls.
  • the catalytic converter has a converter volume which is at most half a catalytic converter volume of the oxidation catalytic converter.
  • converter volume and catalytic converter volume in each case mean the external volumes (walls plus passages) of the at least one converter or of the oxidation catalytic converter.
  • Such a small configuration of the catalytic converter assists with the light-off performance and also promotes a space-saving configuration.
  • each component of the exhaust system has a honeycomb structure with passages through which an exhaust gas can flow.
  • the honeycomb structure is formed by at least partially structured metal foils.
  • the honeycomb structure of the converter and/or of the oxidation catalytic converter in this case has a passage density of at least 600 cpsi (cells per square inch), in particular greater than 1000 cpsi.
  • the particulate trap may require slightly larger passage cross sections, meaning that it is to be constructed with a passage density of greater than 200 cpsi, in particular 400 cpsi or 600 cpsi, in which case a sufficient surface area to accumulate the particles is always available.
  • the metal foils preferably have a thickness of less than 0.06 mm, in particular less than 0.03 mm.
  • FIG. 1 is a diagrammatic, perspective view of an embodiment of an exhaust system according to the invention.
  • FIG. 2 is an enlarged plan view of a component of the exhaust system with a honeycomb structure
  • FIG. 3 is a further enlarged, fragmentary, perspective view of an embodiment of the exhaust system particulate trap.
  • FIG. 4 is an elevational view of a further embodiment of the exhaust system according to the invention disposed close to the engine.
  • FIG. 1 a diagrammatic and perspective view of an exhaust system 1 for purifying exhaust gas from a diesel engine.
  • the exhaust gas starting from the internal combustion engine or diesel engine 2 , flows through the exhaust system 1 in a preferred flow direction 3 .
  • the exhaust system 1 includes, in succession in the flow direction 3 , a catalytic converter 4 , in particular for converting carbon monoxides and hydrocarbons contained in the exhaust gas, an oxidation catalytic converter 5 , in particular for converting nitrogen monoxides contained in the exhaust gas, and a particulate trap 6 for collecting particulates, in particular carbon-based particulates, contained in the exhaust gas.
  • a catalytic converter 4 in particular for converting carbon monoxides and hydrocarbons contained in the exhaust gas
  • an oxidation catalytic converter 5 in particular for converting nitrogen monoxides contained in the exhaust gas
  • a particulate trap 6 for collecting particulates, in particular carbon-based particulates, contained in the exhaust gas.
  • the illustrated exhaust system 1 in some cases has a plurality of exhaust sections upstream of a turbocharger 7 , the illustrated embodiment is equipped with two catalytic converters 4 which are disposed very close to the internal combustion engine 2 . In this case, it is also possible to place the catalytic converters 4 in the exhaust sections of one or more exhaust manifold 8 which is directly connected to the internal combustion engine 2 .
  • the illustrated oxidation catalytic converter 5 has a plurality of zones 9 .
  • the zones 9 have an increasing specific heat capacity as seen in the flow direction 3 of the exhaust gas.
  • the particulate trap 6 is disposed immediately downstream of the oxidation catalytic converter 5 , at a distance 10 of less than 50 mm, as seen in the flow direction 3 .
  • the particulate trap 6 in this case has a total volume 11 which is preferably less than 75% of a volumetric capacity 12 of the internal combustion engine 2 .
  • the volumetric capacity 12 corresponds to the sum of individual volumes of cylinders 21 of the internal combustion engine 2 .
  • the catalytic converters 4 are constructed with a converter volume 17 which is at most half a catalytic converter volume 18 of the oxidation catalytic converter 5 .
  • the term converter volume 17 is to be understood as meaning the sum of the volumes of the catalytic converters 4 .
  • the illustrated exhaust system 1 is preferably to be disposed in the immediate vicinity of the internal combustion engine 2 .
  • it is important in particular to avoid one of the components 4 , 5 , 6 being disposed in the underbody of an automobile.
  • FIG. 2 shows a plan view of a catalytic converter 4 or an oxidation catalytic converter 5 with a honeycomb structure 19 .
  • the honeycomb structure 19 has passages 13 through which an exhaust gas can flow and is formed through the use of at least partially structured metal foils 20 .
  • smooth metal foils 23 and structured metal foils 20 were initially stacked and then wound up, with the honeycomb structure 19 being disposed in a tubular casing 22 in order to increase the stability of the component.
  • the honeycomb structure 19 is preferably constructed with a catalytic coating, which is distinguished in particular by a very fissured surface and consequently also by a high level of efficiency with regard to the conversion of pollutants.
  • FIG. 3 shows a fragmentary, diagrammatic and perspective view of a particulate trap 6 .
  • the particulate trap 6 is composed of a structured metal foil 20 and of a smooth metal foil 23 with apertures 24 and forms freely accessible passages 13 .
  • Wing-shaped diverter devices 16 with openings 25 lead to the effects which have been described above.
  • the diverter devices 16 have calming points 15 and turbulence points 14 .
  • the diverter devices 16 swirl up the exhaust gas so that the particles remain in the particulate trap 6 longer and therefore find it easier to react with other constituents of the exhaust gas.
  • particulates are also thrown onto the metal foils 20 and 23 , where they continue to stick. There, the carbon-based particulates are chemically converted by the nitrogen dioxide flowing through so continuously and effectively that free flow through the passages is ensured at any time.
  • FIG. 4 diagrammatically depicts a further configuration of the exhaust system 1 disposed close to the engine 2 .
  • the exhaust system 1 is used to purify exhaust gas from the internal combustion engine 2 , in particular a diesel engine of an automobile, and the exhaust gas flows through it in a flow direction 3 .
  • the exhaust system 1 includes, in succession in the flow direction 3 , at least one catalytic converter 4 , in particular for converting carbon monoxides and hydrocarbons contained in the exhaust gas, an oxidation catalytic converter 5 , in particular for converting nitrogen monoxide contained in the exhaust gas, and a particulate trap 6 for collecting particulates contained in the exhaust gas.
  • the catalytic converters 4 are disposed particularly close to the combustion chambers of the engine, and specifically there is a small catalytic converter 4 disposed in each outlet from the combustion chambers in an exhaust manifold 28 . Therefore, the catalytic converters 4 are even connected upstream of the turbocharger 7 , which is constructed in particular as an exhaust-gas turbocharger, and which is used to compress fresh air supplied to the engine (fresh air supply 27 ).
  • the oxidation catalytic converter 5 and the particulate trap 6 are disposed in a common housing 26 , with the oxidation catalytic converter 5 being integrated in the particulate trap 6 .
  • the particulate trap 6 has a catalytically active coating in the same way as the oxidation catalytic converter 5 .
  • the particulate trap 6 still has an overall volume 11 which is less than 75% of a volumetric capacity 12 of the internal combustion engine 2 , in particular less than 50% and preferably even less than 25%.
  • the particulate trap 6 is disposed at a distance L from the engine.
  • This distance L is preferably less than 80 cm.
  • the distance L is preferably to be understood as meaning a path length covered by the exhaust gas before it reaches the particulate trap 6 .
  • the exhaust system according to the invention ensures very effective conversion of pollutants contained in the exhaust gas from a diesel engine (in particular carbon monoxide, unsaturated hydrocarbons, nitrogen oxides, carbon-based particulates), and in addition has a particularly positive effect with regard to the regeneration of the particulate trap. More accurately, the increased production of nitrogen dioxide by the oxidation catalytic converter, due to the upstream catalytic converter, means that a sufficient quantity of nitrogen dioxide is made available to the particulate trap to ensure continuous regeneration. This prevents blocked passages and means that emissions are well below the current exhaust emissions limits.
  • pollutants contained in the exhaust gas from a diesel engine in particular carbon monoxide, unsaturated hydrocarbons, nitrogen oxides, carbon-based particulates
  • the increased production of nitrogen dioxide by the oxidation catalytic converter due to the upstream catalytic converter, means that a sufficient quantity of nitrogen dioxide is made available to the particulate trap to ensure continuous regeneration. This prevents blocked passages and means that emissions are well below the current exhaust emissions limits.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Biomedical Technology (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
US10/685,066 2001-04-12 2003-10-14 Exhaust system Abandoned US20040074231A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/912,302 US8166750B2 (en) 2001-04-12 2004-08-04 Exhaust system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10118327A DE10118327A1 (de) 2001-04-12 2001-04-12 Abgassystem
DE10118327.5 2001-04-12
PCT/EP2001/011744 WO2002083274A1 (fr) 2001-04-12 2001-10-11 Systeme d'echappement

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/011744 Continuation WO2002083274A1 (fr) 2001-04-12 2001-10-11 Systeme d'echappement

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/912,302 Division US8166750B2 (en) 2001-04-12 2004-08-04 Exhaust system

Publications (1)

Publication Number Publication Date
US20040074231A1 true US20040074231A1 (en) 2004-04-22

Family

ID=7681394

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/685,066 Abandoned US20040074231A1 (en) 2001-04-12 2003-10-14 Exhaust system
US10/912,302 Expired - Fee Related US8166750B2 (en) 2001-04-12 2004-08-04 Exhaust system

Family Applications After (1)

Application Number Title Priority Date Filing Date
US10/912,302 Expired - Fee Related US8166750B2 (en) 2001-04-12 2004-08-04 Exhaust system

Country Status (8)

Country Link
US (2) US20040074231A1 (fr)
EP (1) EP1379322B2 (fr)
JP (1) JP2004525296A (fr)
KR (1) KR100814204B1 (fr)
CN (1) CN1272089C (fr)
DE (2) DE10118327A1 (fr)
ES (1) ES2245969T5 (fr)
WO (1) WO2002083274A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040202590A1 (en) * 2003-04-11 2004-10-14 Eberhard Jacab Combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine
US20070028604A1 (en) * 2003-03-05 2007-02-08 Johnson Matthey Public Limited Company Diesel engine and a catalysed filter therefor
US20070039295A1 (en) * 2004-08-31 2007-02-22 Ibiden Co., Ltd. Exhaust gas cleanup system
US20070175208A1 (en) * 2003-01-02 2007-08-02 Daimlerchrysler Ag Exhaust Gas Aftertreatment Installation and Method
US20080118702A1 (en) * 2005-06-17 2008-05-22 Emitec Gesellschaft Fur Emissionstechnologie Mbh Process for Producing a Honeycomb Body with a Metallic Fleece, Honeycomb Body Produced by the Process and Process for Filtering an Exhaust-Gas Stream
US20090249773A1 (en) * 2008-04-04 2009-10-08 Ford Global Technologies, Llc Diesel Turbine SCR Catalyst
US20100037768A1 (en) * 2008-08-12 2010-02-18 Man Nutzfahrzeuge Ag Method and device for the regeneration of a particle filter arranged in the exhaust gas tract of an internal combustion engine
GB2462798A (en) * 2008-06-03 2010-02-24 Johnson Matthey Plc Emission control
US20100170230A1 (en) * 2006-09-20 2010-07-08 Johnson Matthey Public Limited Company Washcoated particulate filter substrate
US7799734B2 (en) 2004-05-19 2010-09-21 Emitec Gesellschaft Fur Emissionstechnologie Mbh Catalyst carrier body for a catalytic converter to be installed close to an engine, catalytic converter, exhaust system and vehicle having the catalyst carrier body
US11149617B2 (en) 2016-08-19 2021-10-19 Kohler Co. System and method for low CO emission engine

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10026696A1 (de) * 2000-05-30 2001-12-20 Emitec Emissionstechnologie Partikelfalle
DE10303911B4 (de) * 2003-01-31 2005-02-10 Siemens Ag Verfahren zur Überwachung des Anspringverhaltens eines Abgaskatalysatorsystems
DE10323385B4 (de) * 2003-05-23 2006-02-02 Daimlerchrysler Ag Abgasreinigungsanlage für eine Brennkraftmaschine
DE10327030A1 (de) * 2003-06-16 2005-01-13 Oberland Mangold Gmbh Auffangeinheit für eine Abgasreinigungsvorrichtung
DE102005012525B4 (de) * 2005-03-16 2015-09-10 Ttm Technik Thermische Maschinen Andreas Mayer Verfahren zum Betreiben eines Verbrennungsmotors inklusive Partikelfilterregeneration
BRPI0601188B1 (pt) 2005-04-15 2018-06-26 Seda S.P.A. Recipiente isolado; método de fabricar o mesmo e aparelho para a fabricação
DE102006035052A1 (de) * 2005-11-17 2007-05-24 Robert Bosch Gmbh Filterelement und Filter zur Abgasnachbehandlung
AT8308U3 (de) * 2005-12-29 2007-01-15 Ditest Fahrzeugdiagnose Gmbh Verfahren sowie vorrichtung zur abgasuntersuchung bei dieselmotoren
JP4100440B2 (ja) * 2006-09-26 2008-06-11 トヨタ自動車株式会社 ハイブリッド車両の制御装置
DE202006018406U1 (de) 2006-12-05 2008-04-10 Seda S.P.A. Verpackung
GB2485362A (en) * 2010-11-11 2012-05-16 Johnson Matthey Plc Gasoline engine exhaust manifold comprising a reforming catalyst
US8950176B2 (en) * 2011-06-29 2015-02-10 Electro-Motive Diesel, Inc. System for reducing engine emissions and backpressure using parallel emission reduction equipment
US8857154B2 (en) * 2012-01-23 2014-10-14 Southwest Research Institute Exhaust aftertreatment for NOx-containing exhaust from an internal combustion engine
CN112049715A (zh) * 2020-09-04 2020-12-08 拓信(台州)精密工业有限公司 具有扰流作用的金属蜂窝载体

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5711149A (en) * 1995-05-18 1998-01-27 Toyota Jidosha Kabushiki Kaisha Device for purifying the exhaust gas of a diesel engine
US5839273A (en) * 1993-11-30 1998-11-24 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Method for reducing pollutant emissions of a diesel engine with a downstream oxidation-type catalytic converter
US5987882A (en) * 1996-04-19 1999-11-23 Engelhard Corporation System for reduction of harmful exhaust emissions from diesel engines
US6397588B1 (en) * 1999-09-14 2002-06-04 Emitec Gesellschaft Fur Emissionstechnologie Mbh Catalytic converter for cleaning exhaust gas and exhaust gas purification assembly with a catalytic converter
US6412276B1 (en) * 1999-04-06 2002-07-02 Peugeot Citroen Automobiles Sa Regeneration system for a diesel engine exhaust gas particulate filter
US20020174648A1 (en) * 2001-05-24 2002-11-28 Toshitaka Minami Device for purifying exhaust gas of diesel engines
US20020189247A1 (en) * 2000-11-17 2002-12-19 Zenichiro Kato Exhaust emission control device and method of controlling exhaust emission
US6516611B1 (en) * 1999-05-22 2003-02-11 Degussa-Huls Aktiengesellschaft Process and device for removing soot from the exhaust gas of a diesel engine

Family Cites Families (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10020170C1 (de) 2000-04-25 2001-09-06 Emitec Emissionstechnologie Verfahren zum Entfernen von Rußpartikeln aus einem Abgas und zugehöriges Auffangelement
US3978193A (en) * 1974-01-29 1976-08-31 Gould Inc. Method and apparatus for treating exhaust gases
DE2827815A1 (de) † 1978-06-24 1980-01-03 Stoll Maschf Gmbh Wilhelm Bodenbearbeitungsgeraet
GB2024646B (en) 1978-07-10 1983-05-05 Johnson Matthey Co Ltd Catalytic oxidation of smoke in exhaust gases
US4597262A (en) * 1984-09-07 1986-07-01 Retallick William B Catalytic converter for a diesel engine
DE3723478A1 (de) † 1987-07-16 1989-01-26 Navsat Gmbh Vorrichtung fuer die abscheidung von russ aus dem abgas eines verbrennungsmotors
US4902487A (en) † 1988-05-13 1990-02-20 Johnson Matthey, Inc. Treatment of diesel exhaust gases
DE8908738U1 (de) † 1989-07-18 1989-09-07 Emitec Gesellschaft für Emissionstechnologie mbH, 5204 Lohmar Wabenkörper mit internen Strömungsleitflächen, insbesondere Katalysatorkörper für Kraftfahrzeuge
JP2722828B2 (ja) † 1991-03-06 1998-03-09 日産自動車株式会社 内燃機関の排気フィルタ
JPH06182224A (ja) 1992-09-18 1994-07-05 Nippondenso Co Ltd 自己発熱型ハニカムフィルタ
JP3116628B2 (ja) * 1993-01-21 2000-12-11 株式会社日本自動車部品総合研究所 吸着装置
DE4303601A1 (de) * 1993-02-08 1994-08-11 Emitec Emissionstechnologie Elektrisch beheizbarer Wabenkörper mit durch Schlitze erhöhtem Widerstand
DE4335153C2 (de) * 1993-10-15 1995-09-21 Porsche Ag Abgasanlage für eine Brennkraftmaschine mit einem Abgas-Turbolader
JP3321992B2 (ja) 1994-06-14 2002-09-09 トヨタ自動車株式会社 ターボチャージャ付内燃機関の排気ガス浄化装置
JPH08109824A (ja) * 1994-10-12 1996-04-30 Nippon Soken Inc 内燃機関用の未燃焼炭化水素の吸着装置
US5701736A (en) * 1994-12-19 1997-12-30 Nippon Soken, Inc. Apparatus for purifying exhaust gas
JPH0979024A (ja) 1995-09-12 1997-03-25 Toyota Motor Corp ディーゼル機関の排気浄化装置
JPH09222009A (ja) * 1996-02-15 1997-08-26 Nippon Soken Inc 内燃機関の排気微粒子浄化装置
GB9621215D0 (en) 1996-10-11 1996-11-27 Johnson Matthey Plc Emission control
US5765537A (en) 1997-01-17 1998-06-16 Caterpillar Inc. Fuel recirculation system
DE19704147A1 (de) 1997-02-04 1998-08-06 Emitec Emissionstechnologie Hitzebeständiger und regenerierbarer Filterkörper mit Strömungswegen
JP3666223B2 (ja) 1998-01-13 2005-06-29 日産自動車株式会社 内燃機関の制御装置
DE19820971A1 (de) 1998-05-12 1999-11-18 Emitec Emissionstechnologie Katalytischer Konverter, insbesondere für einen Dieselmotor oder einen Magermotor
DE19823469A1 (de) 1998-05-26 1999-12-02 Emitec Emissionstechnologie Monolithischer metallischer Wabenkörper mit variierender Kanalzahl
JP2000084363A (ja) 1998-09-18 2000-03-28 Daihatsu Motor Co Ltd 内燃機関の排気ガス浄化装置
JP3551789B2 (ja) 1998-10-16 2004-08-11 トヨタ自動車株式会社 内燃機関
DE69903066T2 (de) * 1998-12-05 2003-03-13 Johnson Matthey Public Ltd., Co. Verbesserungen bei abgaspartikelkontrolle
FI107828B (fi) † 1999-05-18 2001-10-15 Kemira Metalkat Oy Dieselmoottoreiden pakokaasujen puhdistusjärjestelmä ja menetelmä dieselmoottoreiden pakokaasujen puhdistamiseksi
DE19934932B4 (de) † 1999-07-26 2011-06-30 MAN Truck & Bus AG, 80995 Verfahren und Vorrichtung zur Abscheidung von Feinstpartikeln aus dem Abgas von Brennkraftmaschinen
DE19938854C5 (de) † 1999-08-17 2006-12-28 Emitec Gesellschaft Für Emissionstechnologie Mbh Vorrichtung zur Verringerung des Stickoxidanteils in einem Abgas einer Verbrennungskraftmaschine
JP2001096113A (ja) 1999-09-30 2001-04-10 Ibiden Co Ltd ハニカムフィルタ、排気ガス浄化装置
JP2001098936A (ja) 1999-09-30 2001-04-10 Ibiden Co Ltd 排気ガス浄化装置
US6233926B1 (en) * 2000-03-01 2001-05-22 Illinois Valley Holding Company Apparatus and method for filtering particulate in an exhaust trap
DE20117659U1 (de) * 2001-10-29 2002-01-10 Emitec Gesellschaft für Emissionstechnologie mbH, 53797 Lohmar Offener Partikelfilter mit Heizelement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5839273A (en) * 1993-11-30 1998-11-24 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Method for reducing pollutant emissions of a diesel engine with a downstream oxidation-type catalytic converter
US5711149A (en) * 1995-05-18 1998-01-27 Toyota Jidosha Kabushiki Kaisha Device for purifying the exhaust gas of a diesel engine
US5987882A (en) * 1996-04-19 1999-11-23 Engelhard Corporation System for reduction of harmful exhaust emissions from diesel engines
US6412276B1 (en) * 1999-04-06 2002-07-02 Peugeot Citroen Automobiles Sa Regeneration system for a diesel engine exhaust gas particulate filter
US6516611B1 (en) * 1999-05-22 2003-02-11 Degussa-Huls Aktiengesellschaft Process and device for removing soot from the exhaust gas of a diesel engine
US6397588B1 (en) * 1999-09-14 2002-06-04 Emitec Gesellschaft Fur Emissionstechnologie Mbh Catalytic converter for cleaning exhaust gas and exhaust gas purification assembly with a catalytic converter
US20020189247A1 (en) * 2000-11-17 2002-12-19 Zenichiro Kato Exhaust emission control device and method of controlling exhaust emission
US20020174648A1 (en) * 2001-05-24 2002-11-28 Toshitaka Minami Device for purifying exhaust gas of diesel engines

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7814747B2 (en) 2003-01-02 2010-10-19 Daimler Ag Exhaust gas aftertreatment installation and method
US20070175208A1 (en) * 2003-01-02 2007-08-02 Daimlerchrysler Ag Exhaust Gas Aftertreatment Installation and Method
US9057307B2 (en) 2003-01-02 2015-06-16 Daimler Ag Exhaust gas aftertreatment installation and method
US8297046B2 (en) 2003-01-02 2012-10-30 Daimler Ag Exhaust gas aftertreatment installation and method
US20070028604A1 (en) * 2003-03-05 2007-02-08 Johnson Matthey Public Limited Company Diesel engine and a catalysed filter therefor
US9169753B2 (en) 2003-03-05 2015-10-27 Johnson Matthey Public Limited Company Diesel engine and a catalysed filter therefor
US6990804B2 (en) 2003-04-11 2006-01-31 Man Nutzfahrzeuge Ag Combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine
US20040202590A1 (en) * 2003-04-11 2004-10-14 Eberhard Jacab Combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine
US7799734B2 (en) 2004-05-19 2010-09-21 Emitec Gesellschaft Fur Emissionstechnologie Mbh Catalyst carrier body for a catalytic converter to be installed close to an engine, catalytic converter, exhaust system and vehicle having the catalyst carrier body
US20070039295A1 (en) * 2004-08-31 2007-02-22 Ibiden Co., Ltd. Exhaust gas cleanup system
EP1785603B1 (fr) * 2004-08-31 2009-06-24 Ibiden Co., Ltd. Circuit d'épuration de gaz d'échappement
US20080118702A1 (en) * 2005-06-17 2008-05-22 Emitec Gesellschaft Fur Emissionstechnologie Mbh Process for Producing a Honeycomb Body with a Metallic Fleece, Honeycomb Body Produced by the Process and Process for Filtering an Exhaust-Gas Stream
US20100170230A1 (en) * 2006-09-20 2010-07-08 Johnson Matthey Public Limited Company Washcoated particulate filter substrate
US8398925B2 (en) 2006-09-20 2013-03-19 Johnson Matthey Public Limited Company Washcoated particulate filter substrate
US7971430B2 (en) 2008-04-04 2011-07-05 Ford Global Technologies, Llc Diesel turbine SCR catalyst
US8631648B2 (en) 2008-04-04 2014-01-21 Ford Global Technologies, Llc Diesel turbine SCR catalyst
US20090249773A1 (en) * 2008-04-04 2009-10-08 Ford Global Technologies, Llc Diesel Turbine SCR Catalyst
GB2462798A (en) * 2008-06-03 2010-02-24 Johnson Matthey Plc Emission control
US8404011B2 (en) * 2008-08-12 2013-03-26 Man Nutzfahrzeuge Ag Method and device for the regeneration of a particle filter arranged in the exhaust gas tract of an internal combustion engine
US20100037768A1 (en) * 2008-08-12 2010-02-18 Man Nutzfahrzeuge Ag Method and device for the regeneration of a particle filter arranged in the exhaust gas tract of an internal combustion engine
US11149617B2 (en) 2016-08-19 2021-10-19 Kohler Co. System and method for low CO emission engine
US11643962B2 (en) 2016-08-19 2023-05-09 Kohler Co. System and method for low CO emission engine

Also Published As

Publication number Publication date
EP1379322A1 (fr) 2004-01-14
KR100814204B1 (ko) 2008-03-17
JP2004525296A (ja) 2004-08-19
EP1379322B1 (fr) 2005-07-13
DE50106743D1 (de) 2005-08-18
ES2245969T3 (es) 2006-02-01
DE10118327A1 (de) 2002-10-17
US20050005597A1 (en) 2005-01-13
CN1272089C (zh) 2006-08-30
KR20040010621A (ko) 2004-01-31
ES2245969T5 (es) 2012-06-27
US8166750B2 (en) 2012-05-01
EP1379322B2 (fr) 2012-04-04
WO2002083274A1 (fr) 2002-10-24
CN1602224A (zh) 2005-03-30

Similar Documents

Publication Publication Date Title
US8166750B2 (en) Exhaust system
US8133842B2 (en) Exhaust treatment device facilitating through-wall flow
CN101845978B (zh) 具有四效和尿素scr催化器的排气处理系统及使用方法
US9587540B2 (en) Method and device for reactivating exhaust-gas purification systems of diesel engines with low-pressure EGR
US8926926B2 (en) Exhaust particulate management for gasoline-fueled engines
US9784161B2 (en) Exhaust gas purification system for diesel engines of utility motor vehicles
EP1435437A1 (fr) Améliorations pour un système et une méthode de traitement des gaz d'échappement
CN112867563B (zh) 用于汽油发动机的废气净化系统
JP4263711B2 (ja) 内燃機関の排気浄化装置
CN1813120A (zh) 微粒捕集器的再生
US20100115930A1 (en) Exhaust after treatment system
US7799734B2 (en) Catalyst carrier body for a catalytic converter to be installed close to an engine, catalytic converter, exhaust system and vehicle having the catalyst carrier body
EP1697621B1 (fr) Appareil permettant de purifier des gaz d'echappement
JP2005256633A (ja) 排気ガス浄化システム
JP2002285823A (ja) 内燃機関の排気浄化装置
JP5067478B2 (ja) 内燃機関の排気浄化装置
JP2005256632A (ja) 排気ガス浄化システム
JP2009220033A (ja) 排気浄化触媒装置
JP2005256634A (ja) 排気ガス浄化システム
JP2001280117A (ja) 内燃機関の排気浄化装置
HK1095619A (en) Methods of controlling reductant addition

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION