EP1892397A1 - Moteur à combustion interne à au moins deux cylindres et un système de post-traitement des gaz d'échappement - Google Patents

Moteur à combustion interne à au moins deux cylindres et un système de post-traitement des gaz d'échappement Download PDF

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Publication number
EP1892397A1
EP1892397A1 EP06119441A EP06119441A EP1892397A1 EP 1892397 A1 EP1892397 A1 EP 1892397A1 EP 06119441 A EP06119441 A EP 06119441A EP 06119441 A EP06119441 A EP 06119441A EP 1892397 A1 EP1892397 A1 EP 1892397A1
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EP
European Patent Office
Prior art keywords
exhaust gas
exhaust
combustion engine
internal combustion
cylinders
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.)
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Application number
EP06119441A
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German (de)
English (en)
Inventor
Torsten Kluge
Vanco Smiljanovski
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Ford Global Technologies LLC
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Ford Global Technologies LLC
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Publication date
Application filed by Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Priority to EP06119441A priority Critical patent/EP1892397A1/fr
Publication of EP1892397A1 publication Critical patent/EP1892397A1/fr
Withdrawn legal-status Critical Current

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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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
    • F01N13/017—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel the purifying devices are arranged in a single housing
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/16—Plurality of inlet tubes, e.g. discharging into different chambers

Definitions

  • the invention relates to an internal combustion engine having at least two cylinders (n ⁇ 2), with at least one intake pipe for supplying the n cylinder with fresh air or fresh mixture and a Abgasab2020system for discharging the exhaust gas from the n cylinders, wherein the Abgasab2020system an exhaust aftertreatment system for the aftertreatment of the exhaust gas is provided.
  • internal combustion engine includes both diesel engines and gasoline engines.
  • Thermal reactors attempt to achieve a substantial post-oxidation of HC and CO in the exhaust system by providing heat insulation and a sufficiently large volume in the exhaust pipe of the exhaust system.
  • the thermal insulation should ensure the highest possible temperature level by minimizing the heat losses, whereas a large exhaust pipe volume ensures a long residence time of the exhaust gases. Both the long residence time and the high temperature level support the desired post-oxidation.
  • a disadvantage is the poor efficiency at substoichiometric Combustion and the high costs. For diesel engines, thermal reactors are not effective because of the generally lower temperature level.
  • catalytic reactors are used in the prior art which, using catalytic materials which increase the speed of certain reactions, ensure oxidation of HC and CO even at low temperatures, which is why these catalytic reactors or catalysts are also used as oxidation catalysts can be designated.
  • oxidation catalyst since the mode of operation on which they are based and at least similar to their transferring tasks.
  • the oxidation catalysts also expressly include the three-way catalyst described below.
  • nitrogen oxides NO x are reduced by means of the existing unoxidized exhaust gas components, namely the carbon monoxides and the unburned hydrocarbons, wherein at the same time these - serving as a reducing agent - exhaust gas components are oxidized.
  • Oxidation catalysts require a minimum operating temperature, which may be for example at 150 ° C. This so-called light-off temperature is characterized in that a noticeable increase in the conversion rate with respect to the exhaust components to be oxidized is observed.
  • An oxidation catalyst should reach its light-off temperature as quickly as possible, even within a relatively short period of time, even after a cold start.
  • an oxidation catalyst according to the prior art is arranged as close to the outlet of the internal combustion engine, so that the hot exhaust gases have to travel as short a path to the oxidation catalyst, whereby the exhaust gases are given little time to cool.
  • the close placement or shortened length of the exhaust delivery system also results in a lower mass of the exhaust delivery system. Both ensure that the oxidation catalyst reaches the required operating temperature or light-off temperature as quickly as possible.
  • Abgasabriossystem exhaust aftertreatment systems such as a storage catalyst, an SCR catalyst, a particulate filter or the like, are preferably to be arranged downstream of the oxidation catalyst.
  • the oxidation processes taking place in the oxidation catalytic converter especially in the case of substoichiometric operation ( ⁇ ⁇ 1) of the internal combustion engine due to the high concentration of unburned hydrocarbons in the exhaust gas, ensure a noticeable increase in the exhaust gas temperature and thus not only for heating of the oxidation catalytic converter, but also for a catalytic converter Heating the downstream provided exhaust aftertreatment systems, which are flowed through by the hot exhaust gas.
  • Figures 1a and 1b show a first embodiment of the prior art using the example of a four-cylinder internal combustion engine in which an oxidation catalyst 104a as close to the cylinders 101a, 101b, 101c, 101d that is arranged at the outlet of the internal combustion engine.
  • a disadvantage of this structural design of the Abgasab Chinasystems is that the dynamic wave processes in Abgasab Chinasystem can affect the charge cycle unfavorable. Among other things, it has to be taken into account that pressure fluctuations in gaseous media propagate as waves which can pass through the exhaust gas lines 102a, 102b, 102c, 102d and can be reflected.
  • the pressure spike of the preload exhaust may be reflected in the exhaust evacuation system at an open end as a negative pressure wave and at a closed end as an overpressure wave.
  • the flow in the tube then results from the superposition of the leading and reflected wave.
  • FIG. 1b shows the oxidation catalytic converter 104a serving as the exhaust gas aftertreatment system 103a in cross section along the line A - A, wherein the monolith serving as a carrier substrate can be recognized.
  • the exhaust aftertreatment system when a particulate filter serving as an exhaust aftertreatment system is the subject of consideration, the exhaust aftertreatment system must probably be considered a closed pipe end, because honeycomb filters are generally used which comprise a multiplicity of ducts which alternately d. H. are closed in the checkerboard pattern, so that the exhaust gas flows into the channels open at the inlet of the honeycomb filter and on the way to the outlet, the channel walls of these channels closed to exit must flow to get into a channel which is open to the outlet of the honeycomb filter , In the case of surface filters, the pore diameters of the carrier substrate are so small that the soot particles do not penetrate into the filter material, but deposit themselves as filter cakes on the surface of the filter.
  • the simple unimpeded propagation of the individual exhaust gas flows or of the overpressure waves in the exhaust gas lines 102a, 102b, 102c, 102d is of greater relevance; not least, because unfavorable reflections can be prevented by an appropriate tuning of the tube lengths of the exhaust pipes 102a, 102b, 102c, 102d or only play a role at a certain speed.
  • the preload output that propagates along the first exhaust passage 102a upon opening of the first cylinder 101a can freely propagate into the remaining three exhaust passages 102b, 102c, 102d, to the exhaust ports of the respective cylinders 101b, 101c, 101d, and the discharge of the Exhaust gases from these cylinders 101b, 101c, 101d adversely affect or hinder.
  • two exhaust pipes 102a, 102b, 102c, 102d are combined in pairs and fed to two pre-catalysts 104b, 104c or Interimskatalysatoren.
  • FIG. 2b shows the exhaust aftertreatment systems 103b, 103c serving as pre-catalysts 104b, 104c in cross section along the line B-B, wherein the monoliths serving as carrier substrates can be seen.
  • the exhaust gases are forwarded from the third catalytic converter 104a in a common exhaust gas line 106.
  • FIGS. 2a and 2b The embodiment illustrated in FIGS. 2a and 2b is referred to as a 4-in-2-in-1 system in which the four short exhaust pipes 102a, 102b, 102c, 102d of the four cylinders 101a, 101b, 101c, 101d-in stages- are first merged into two exhaust pipes 105a, 105b and finally to an overall exhaust line 106.
  • the exhaust pipes 102a, 102b, 102c, 102d of the individual cylinders 101a, 101b, 101c, 101d are not randomly but in a targeted manner paired so that two cylinders 101a, 101b, 101c, 101d are merged, their control times 360 ° KW are offset from each other, so that the Vorlastausfeld or the exhaust gas flow of the one cylinder 101a, 101b, 101c, 101d can not affect the charge exchange of the other involved cylinder 101a, 101b, 101c, 101d.
  • the exhaust pipes 102a, 102d of the first and fourth cylinders 101a, 101d and the exhaust pipes 102b, 102c of the second and third cylinders 101b, 101c are merged.
  • the preload output or the exhaust gas flow of the first cylinder 101a may indeed be after the merging of the two exhaust pipes 105a, 105b on the third catalyst 104a in the direction of the second and third cylinders 101b, 101c propagate.
  • the distance that the exhaust gas or the Vorlastaustalk has to cover starting from the first cylinder 101a to propagate until the outlet of the second and / or third cylinder 101b, 101c, there to possibly affect the charge exchange, is so far increased that when the Vorlastausmenes the outlet openings of these two cylinders 101b, 101c are already closed.
  • the gas-tight separated channel-shaped segments of the exhaust aftertreatment system of the internal combustion engine according to the invention ensure that the exhaust gas flows of the individual cylinders of the internal combustion engine are isolated from each other during exhaust aftertreatment.
  • the evacuated from the individual cylinders d. H. exhaust gases discharged during the exhaust stroke are supplied to the individual channel-shaped segments by means of separate exhaust gas supply lines, so that the exhaust gas flows of the individual cylinders are separated from each other upstream of the after-treatment.
  • an exhaust gas supply line connects a cylinder with a channel-shaped segment.
  • the exhaust flow or the preload output of a cylinder can therefore not propagate from the exhaust aftertreatment system in the direction of another cylinder and adversely affect the charge cycle of this cylinder.
  • the internal combustion engine according to the invention or the structural design of the exhaust aftertreatment system thus allows the advantageous close-coupled arrangement of the exhaust gas treatment system.
  • the inventive design of the exhaust aftertreatment system also offers advantages in terms of cost.
  • a dense packaging of the exhaust system can be realized.
  • the object underlying the invention is achieved, namely to provide an internal combustion engine with which the known from the prior art disadvantages are eliminated and in particular a close-coupled arrangement of the exhaust aftertreatment system is realized, which is both cost, as well as the exhaust gas flows of the cylinder in the required manner to avoid adverse effects on the charge cycle of the individual cylinders.
  • the channel-shaped segments are surrounded by a housing-like jacket.
  • This jacket can be integrally formed or modularly constructed of several part walls.
  • a common housing is provided, which encloses and bundles the channel-shaped segments, wherein the individual segments are separated from one another by partition walls or insulated from one another.
  • the boundary walls forming the jacket are then preferably connected to one another.
  • the exhaust aftertreatment system comprises a carrier substrate or a honeycomb body or monoliths
  • the walls forming the carrier substrate or the monoliths are not partitions or jacket sections within the meaning of the present application.
  • each segment has an independent carrier substrate.
  • Embodiments of the internal combustion engine in which n exhaust-gas discharge lines are provided are advantageous, wherein each exhaust-gas discharge line connects a channel-shaped segment to a total exhaust gas line arranged downstream.
  • the exhaust gas flows of the individual cylinders are also performed after the exhaust aftertreatment, ie downstream of the exhaust aftertreatment system, first in separate Abgasabdies Oberen.
  • the length of the Abgaszumoltechnische and Abgasabstructure admiren is dimensioned or chosen in such a way that when the Vorlastausiteses a cylinder of the outlet of the vulnerable cylinder is closed upon arrival.
  • the channel-shaped segments are arranged in the manner adjacent to each other, that the housing-like shells of the segments touch at least partially.
  • the channel-shaped segments support each other or mutually in their heating process, which offers advantages especially during the warm-up phase after a cold start.
  • the considered exhaust gas aftertreatment system is an oxidation catalytic converter
  • the oxidation processes taking place in one segment contribute to the heating of the adjacent segments, so that the oxidation catalytic converter or the individual segments reach their light-off temperature much faster, which has an advantageous effect on the pollutant emissions - in particular on the emissions of unburned hydrocarbons.
  • Embodiments of the internal combustion engine in which the exhaust aftertreatment system is a storage catalytic converter or an SCR catalytic converter are advantageous.
  • the nitrogen oxides NO x present in the exhaust gas can in principle - ie due to the lack of reducing agents - not be reduced without additional measures.
  • selective catalysts - so-called SCR catalysts - are used, in which targeted reducing agent is introduced into the exhaust gas to selectively reduce the nitrogen oxides.
  • targeted reducing agent not only ammonia and urea but also unburned hydrocarbons are used.
  • the latter is also referred to as HC enrichment, wherein the unburned hydrocarbons are introduced directly into the exhaust tract or else by internal engine measures, for example by a post-injection of additional fuel into the combustion chamber after the actual combustion supplied.
  • the nitrogen oxide emissions can also use a so-called nitrogen oxide storage catalytic converter (LNT - L ean N O x T rap) can be reduced.
  • the nitrogen oxides are first - during a lean operation of the internal combustion engine - absorbed in the catalyst, ie collected and stored, and then during a regeneration phase, for example by means of a substoichiometric operation (for example, ⁇ ⁇ 0.95) of the engine to be reduced in oxygen deficiency, then under
  • a substoichiometric operation for example, ⁇ ⁇ 0.95
  • the more commonly used in the exhaust unburned hydrocarbons can serve as a reducing agent.
  • the temperature of the storage catalyst should preferably be in a temperature window between 200 ° C and 450 ° C, wherein the contained in the exhaust gas Sulfur, which is also absorbed in the LNT, must be removed on a regular basis.
  • the LNT must be heated to high temperatures, usually between 600 ° C and 700 ° C, and supplied with a reducing agent.
  • the storage catalytic converter thus also requires a certain operating temperature in order to satisfactorily convert the nitrogen oxides present in the exhaust gas. Particularly high temperatures require regularly performed desulfurization.
  • a first LNT which has a comparatively small volume and with which the nitrogen oxides are to be satisfactorily converted during the warm-up phase and low exhaust gas mass flows, arranged close to the engine, whereas with larger exhaust masses, the nitrogen oxides by means of a second LNT, which is arranged downstream of the first LNT and a larger volume, to be post-treated.
  • the small volume of the first LNT and the close-coupled arrangement of this LNT ensure sufficient conversion of the nitrogen oxides after a cold start.
  • Embodiments of the internal combustion engine in which the exhaust aftertreatment system is a particle filter are advantageous.
  • so-called regenerative particulate filters are used in the prior art, which filter out and store the soot particles from the exhaust gas, these soot particles are intermittently burned in the regeneration of the filter.
  • oxygen or an excess of air in the exhaust gas is required to oxidize the soot in the filter, which can be achieved for example by a superstoichiometric operation ( ⁇ > 1) of the internal combustion engine.
  • the exhaust aftertreatment systems described above - particulate filter, storage catalytic converter and SCR catalytic converter - show that the problem described using the example of the oxidation catalytic converter is similar in the case of other exhaust aftertreatment systems. Accordingly, the same measures to solve the problems are effective.
  • the internal combustion engine according to the invention combines the design features or solution features in this regard.
  • particle filter As particle filter, storage catalyst and SCR catalysts can be arranged to meet the respective requirements of the emission control.
  • FIG. 3a schematically shows a first embodiment of a catalytic converter arrangement of the internal combustion engine according to the invention.
  • FIG. 3b shows the used catalyst 4 of the catalyst arrangement shown in FIG. 3a in cross section along the line C-C.
  • the internal combustion engine has four cylinders 1a, 1b, 1c, 1d and an exhaust gas discharge system for exhausting the exhaust gases from the four cylinders 1a, 1b, 1c, 1d.
  • oxidation catalyst 4 is arranged, with which the exhaust gases are post-treated, in particular carbon monoxide and unburned hydrocarbons are oxidized.
  • the exhaust gas flow through the oxidation catalyst 4 has - as shown in Figure 3b - four channel-shaped segments 7a, 7b, 7c, 7d, which are aligned in the direction of the main flow direction of the exhaust gases, wherein each one AbgaszuWORKtechnisch 2a, 2b, 2c, 2d a cylinder 1a , 1b, 1c, 1d with a channel-shaped segment 7a, 7b, 7c, 7d connects.
  • the channel-shaped segments 7a, 7b, 7c, 7d are each surrounded by a housing-like jacket and thereby separated from each other gas-tight.
  • the gas-tight separated channel-shaped segments 7a, 7b, 7c, 7d of the oxidation catalyst 4 ensure together with the four AbgaszuWORKtechnischen 2a, 2b, 2c, d, that the exhaust gas flows of the individual cylinders 1a, 1b, 1c, 1d of the internal combustion engine during the exhaust aftertreatment and isolated from each other upstream of the post-treatment d. H. are separated.
  • the housing-like jacket of the channel-shaped segments 7a, 7b, 7c, 7d is not made in one piece, but has a modular construction.
  • a common housing 8 is provided which encloses and bundles the four channel-shaped segments 7a, 7b, 7c, 7d, the individual segments 7a, 7b, 7c, 7d being separated from one another by partitions 9a, 9b.
  • the partitions 9a, 9b serve simultaneously as multiple boundary walls, whereby a heat coupling between the Segments 7a, 7b, 7c, 7d is realized, which is why the segments 7a, 7b, 7c, 7d support each other in their heating process.
  • Each segment 7a, 7b, 7c, d has an independent carrier substrate.
  • each Abgasab2020 Gustaven 5a, 5b, 5c, 5d connects a channel-shaped segment 7a, 7b, 7c, 7d with a downstream total exhaust gas line 6.
  • the exhaust gas flows of the individual cylinders 1a, 1b, 1c, 1d also after the exhaust aftertreatment d.
  • downstream of the oxidation catalyst 4 initially in separate Abgasabtechnologie Gustaven 5a, 5b, 5c, 5d performed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
EP06119441A 2006-08-24 2006-08-24 Moteur à combustion interne à au moins deux cylindres et un système de post-traitement des gaz d'échappement Withdrawn EP1892397A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06119441A EP1892397A1 (fr) 2006-08-24 2006-08-24 Moteur à combustion interne à au moins deux cylindres et un système de post-traitement des gaz d'échappement

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Application Number Priority Date Filing Date Title
EP06119441A EP1892397A1 (fr) 2006-08-24 2006-08-24 Moteur à combustion interne à au moins deux cylindres et un système de post-traitement des gaz d'échappement

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EP1892397A1 true EP1892397A1 (fr) 2008-02-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112901319A (zh) * 2014-12-31 2021-06-04 康明斯排放处理公司 紧密联接的单模块后处理系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725943A1 (de) * 1977-06-08 1978-12-21 Daimler Benz Ag Katalysator
WO1991007575A1 (fr) * 1989-11-15 1991-05-30 Ford Motor Company Limited Systeme d'echappement
EP0831209A1 (fr) * 1996-09-19 1998-03-25 Toyota Jidosha Kabushiki Kaisha Dispositif d'épuration des gaz d'échappement pour moteur à combustion interne
WO1999067513A1 (fr) * 1998-06-23 1999-12-29 Grand Prix Silencers B.V. Logement de catalyseur ameliore
DE10329000A1 (de) * 2003-06-27 2005-01-27 Emitec Gesellschaft Für Emissionstechnologie Mbh Abgasnachbehandlungsanlage mit einem Gegenstromgehäuse, sowie entsprechendes Verfahren zur Abgasnachbehandlung
EP1524031A1 (fr) * 2003-10-17 2005-04-20 Ngk Insulators, Ltd. Structure en nid d'abeilles et pot catalytique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725943A1 (de) * 1977-06-08 1978-12-21 Daimler Benz Ag Katalysator
WO1991007575A1 (fr) * 1989-11-15 1991-05-30 Ford Motor Company Limited Systeme d'echappement
EP0831209A1 (fr) * 1996-09-19 1998-03-25 Toyota Jidosha Kabushiki Kaisha Dispositif d'épuration des gaz d'échappement pour moteur à combustion interne
WO1999067513A1 (fr) * 1998-06-23 1999-12-29 Grand Prix Silencers B.V. Logement de catalyseur ameliore
DE10329000A1 (de) * 2003-06-27 2005-01-27 Emitec Gesellschaft Für Emissionstechnologie Mbh Abgasnachbehandlungsanlage mit einem Gegenstromgehäuse, sowie entsprechendes Verfahren zur Abgasnachbehandlung
EP1524031A1 (fr) * 2003-10-17 2005-04-20 Ngk Insulators, Ltd. Structure en nid d'abeilles et pot catalytique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112901319A (zh) * 2014-12-31 2021-06-04 康明斯排放处理公司 紧密联接的单模块后处理系统
CN112901319B (zh) * 2014-12-31 2022-12-16 康明斯排放处理公司 紧密联接的单模块后处理系统

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