WO2005093229A2 - Systeme d'echappement pour moteur a combustion interne - Google Patents

Systeme d'echappement pour moteur a combustion interne Download PDF

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Publication number
WO2005093229A2
WO2005093229A2 PCT/AT2005/000093 AT2005000093W WO2005093229A2 WO 2005093229 A2 WO2005093229 A2 WO 2005093229A2 AT 2005000093 W AT2005000093 W AT 2005000093W WO 2005093229 A2 WO2005093229 A2 WO 2005093229A2
Authority
WO
WIPO (PCT)
Prior art keywords
inlet
exhaust gas
exhaust system
particle filter
outlet
Prior art date
Application number
PCT/AT2005/000093
Other languages
German (de)
English (en)
Other versions
WO2005093229A3 (fr
Inventor
Paul Kapus
Thomas Cartus
Original Assignee
Avl List Gmbh
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
Priority claimed from AT5282004A external-priority patent/AT501401B1/de
Application filed by Avl List Gmbh filed Critical Avl List Gmbh
Priority to DE112005000653T priority Critical patent/DE112005000653A5/de
Publication of WO2005093229A2 publication Critical patent/WO2005093229A2/fr
Publication of WO2005093229A3 publication Critical patent/WO2005093229A3/fr

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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
    • 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
    • F01N3/2825—Ceramics
    • 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
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1861—Construction facilitating manufacture, assembly, or disassembly the assembly using parts formed by casting or moulding
    • 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
    • F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
    • 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
    • F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled

Definitions

  • the invention relates to an exhaust system for an internal combustion engine with at least two groups of cylinders, with each group being assigned a partial exhaust gas train and the inlet-side partial exhaust gas strands being routed separately to a common catalyst housing with a single catalyst brick, the inlet-side partial exhaust gas string being separated up to an inlet end of the catalyst brick are guided so that each exhaust gas strand acts on a predefined inlet area of the inlet end of the catalyst brick.
  • the invention relates to an exhaust system for an internal combustion engine with at least one exhaust aftertreatment system having at least one first particle filter in the exhaust line, wherein at least one second particle filter is arranged downstream of the first particle filter in the exhaust line and at least one first sensor and between the first and second particle filter upstream of the first particle filter at least one second sensor is arranged.
  • the exhaust lines are grouped together and subjected to exhaust aftertreatment separately in groups. A mutual interference of the gas dynamic activity can thereby be avoided.
  • DE 92 01 320 U1 discloses a catalytic converter device for internal combustion engines, with at least two exhaust gas inlet pipes and at least two gas outlet pipes that can be connected to the internal combustion engine and at least two gas outlet pipes connected to the housing surrounding the catalyst substrate, the cross-sectional areas of which on the inlet and outlet sides are opposite different areas of the associated substrate end faces.
  • No. 5,950,423 A describes an exhaust gas system with a catalytic converter arrangement, into which two exhaust gas lines open concentrically.
  • a funnel-shaped exhaust gas distribution device is arranged downstream of the catalytic converter. The partial exhaust gas strands are therefore not continued separately downstream of the catalytic converter, but are combined immediately downstream of the catalytic converter and before they enter a further exhaust gas aftertreatment device.
  • an early combination of the exhaust gas flows has a disadvantageous effect on the gas dynamic activities.
  • particle filter systems in particular in diesel internal combustion engines, to increase the exhaust gas quality.
  • the particle filters are regenerated from a certain soot load, whereby the soot burn-up means that the particle filter is exposed to higher temperatures for a short time. This leads to thermal stresses in the filter substrate, which can lead to hairline cracks, which reduce the efficiency of the particle filter.
  • the filter substrates of particle filter systems mostly consist of silicon carbide or Korderiete ceramics with a honeycomb structure. Such systems have filter efficiencies for the insoluble particle fraction between 90% and 99%. With these high levels of efficiency, the current legal limits for car certification can be reached and even undercut by an order of magnitude.
  • An exhaust system is known from JP 60-043113 A, in which a particle filter is arranged downstream of a catalytic converter. Particle filter and catalytic converter are each housed in their own housing.
  • EP 0 405 310 A2 discloses an exhaust system with an oxidation catalyst, which is connected upstream of the soot filter. Oxidation catalyst and particle filter are arranged in a common housing.
  • EP 0 154 145 A2 describes a device for cleaning the exhaust gases of diesel engines with filter elements arranged one behind the other for the separation of soot particles, at least one filter element carrying a catalyst which lowers the ignition temperature of the soot and promotes its combustion, and at least one filter element carries the gaseous combustion Catalyst promoting pollutants carries, the filter elements with different catalysts alternate several times.
  • Particle filters of this type with a catalytic coating are, however, more expensive than particle filters which are connected downstream of a catalytic converter for exhaust gas aftertreatment.
  • an exhaust gas filter for internal combustion engines with a filter insert which consists of a plurality of compressed, axially arranged wire mesh disks, which are surrounded by metallic enclosures of various designs, the adjoining enclosures being welded to one another.
  • the soot retention capacity and thus the efficiency are, however, worse than with standard particle filter systems made of filter substrates, which consist of SiC or Korderiete ceramics.
  • FR 2 795 132 AI discloses an exhaust system for an internal combustion engine with two particle filters arranged one behind the other in a housing.
  • the second particle filter downstream of the first particle filter is dimensioned smaller than the first.
  • Pressure sensors are arranged in front of the first particle filter and between the two particle filters in order to determine the pressure drop of the first particle filter.
  • Another object of the invention is to ensure permanent compliance with legal limit values.
  • this is achieved in that the inlet areas and / or outlet areas of the catalyst brick of different exhaust gas partial strands are arranged essentially concentrically to one another and that each outlet area is designed to be flush with an inlet area of the corresponding inlet-side partial exhaust gas strand. It is preferably provided that an inlet-side first exhaust gas partial strand is guided in the region of the entry into the catalyst brick within a region of an inlet-side second exhaust gas strand preferably formed by an inlet cone. The inlet-side first exhaust gas strand can be inserted into the inlet cone of the inlet-side second exhaust gas strand and welded to it.
  • the inlet cone is designed as a cast piece, the inlet cone preferably having a preferably conical inner tube associated with the inlet-side first exhaust gas partial section.
  • an outlet-side first exhaust gas strand is guided in the area of the outlet from the catalyst brick within a region of an outlet-side second exhaust gas strand which is preferably formed by an outlet cone, the outlet-side first exhaust gas strand preferably being led into the outlet cone of the outlet-side second tube Exhaust gas strand inserted and welded to it.
  • the outlet cone is designed as a cast piece, the outlet cone preferably having a preferably conical inner tube associated with the outlet-side first exhaust gas partial line.
  • the preferably conical inner tube can each be made in one or more parts with the inlet or outlet cone.
  • a predefined gap is formed between the inlet and the outlet-side first exhaust gas strands and the catalyst brick in order to avoid mechanical stresses in the catalyst brick.
  • a sealing means can be provided between the first partial exhaust gas strands and the catalyst brick in order to separate the first partial exhaust gas strand from the second partial exhaust gas strand.
  • the sealing means can be designed as a labyrinth seal, with a step or groove formed by shaping the catalyst brick particularly preferably improving the sealing of the preferably conical inner tube with respect to the second partial exhaust gas line.
  • the sealant can also be formed as a soft material seal.
  • a ⁇ probe is arranged in the region of the gap in such a way that the exhaust gas flows from all groups of cylinders can be monitored with this ⁇ probe.
  • the sealant preferably has at least one material breakthrough.
  • a second ⁇ probe can be arranged in the area of the exit face for diagnostic purposes.
  • at least one ⁇ -probe is arranged in the area of the inlet or outlet cone or in the area of the entry or exit of the first partial exhaust line into or out of the second partial exhaust line such that the exhaust gas flows of both partial exhaust lines are monitored can.
  • the ⁇ probe borders on a flow connection between the first and second partial exhaust gas strands.
  • the cross-section of the flow connection is so small that the gas dynamic activity is not or hardly influenced.
  • the fact that each ⁇ probe can recognize the exhaust gas lines of both groups means that the number of ⁇ probes can be significantly reduced.
  • the catalyst brick can be made of ceramic.
  • the third sensor can be used to separately evaluate each individual particle filter. It is therefore not only possible to immediately detect defects in the first, but also in the second particle filter.
  • the third sensor can be designed to be temperature-sensitive and / or pressure-sensitive. In particular, a pressure sensor can be used to immediately detect unusual pressure drops at the second particle filter.
  • at least one sensor as an acoustic or photoacoustic sensor.
  • At least one oxidation catalyst can be arranged upstream of the first particle filter. The oxidation catalyst increases the efficiency of the particle filter.
  • the first and second particle filters can thus be arranged in series one behind the other.
  • the dimensioning of the larger first particle filter, which is arranged first in the flow direction, is such that operation is possible without restriction, that is to say the design of the loading and regeneration strategy is based on this first particle filter.
  • the significantly smaller second particle filter is connected in series. This second particle filter increases the filter efficiency in normal operation and ensures the necessary filter effect of the entire system if the first particle filter is damaged. Since this second particle filter has a significantly lower load compared to the upstream first particle filter, the demand is on Regeneration significantly less.
  • the second particle filter is located immediately after the first particle filter during the regeneration in the hot exhaust gas stream, so that soot burn-off in the second particle filter is ensured. Due to the lower soot loading of the second particle filter, temperature peaks, which typically occur during filter regeneration due to the soot burn-off, are avoided.
  • At least one particle filter has a particle filter structure with filter channels. Due to the particle filter structure, the exhaust gas has to pass the wall between adjacent filter channels.
  • the particle filters advantageously consist of filter substrates, preferably of sintered metal, silicon carbide, cord rivets or similar ceramics, with at least one particle filter having a catalytic coating to increase the efficiency.
  • At least two components from the group consisting of an oxidation catalyst, a first particle filter and a second particle filter can be arranged in a common housing. Alternatively, it is also possible to accommodate the components in separate housings.
  • the first and second particle filters are spaced apart in the flow direction in order to compensate for thermal stresses.
  • the second particle filter is thus less loaded, so damage to the second particle filter is less likely. If an error occurs in the second particle filter, it can be detected immediately via the third sensor.
  • FIG. 3 shows detail III of this exhaust system from FIG. 2;
  • FIG. 5 shows the detail V from FIG. 3 in a first embodiment variant
  • FIG. 6 shows the detail V from FIG. 3 in a second embodiment variant
  • FIG. 7 shows the detail V from FIG. 3 in a third embodiment variant
  • FIG. 8 shows the detail V from FIG. 3 in a fourth embodiment variant; and 9 shows an exhaust gas aftertreatment device arranged in an exhaust line of an internal combustion engine.
  • FIG. 1 shows a known exhaust system 21 with a plurality of cylinders 22.
  • Each exhaust group 23, 24 of cylinders 22 is assigned a partial exhaust line 25, 26.
  • the two exhaust gas strands 25, 26 are guided separately to a catalyst housing 27 common to both exhaust gas strands 25, 26, in which a single catalyst brick 28 is arranged.
  • the two partial exhaust gas strands 25, 26 end immediately in front of an inlet end 29 of the catalyst brick 28, a partition 30 being guided between the two partial exhaust gas strands 25, 26 until just before the catalyst brick 28, but not touching it.
  • Exhaust partial strands 32, 33 are connected to the outlet end 31 of the catalyst brick 28, the inlet regions 34; 35 of the entry face 29 and the exit areas 36; 37 of the outlet end face 31 of the catalyst brick 28 are arranged in alignment with one another in the flow direction, so that each half of the catalyst brick 28 is only flowed through by exhaust gas from a group 23, 24 of cylinders 22. Due to the different pressures in the exhaust gas strands 25, 26, however, there is a lateral load on the catalyst brick 28, which can lead to breaks and jumps within the catalyst brick 28.
  • FIGS. 2 and 3 show an exhaust system 1 according to the invention for an internal combustion engine with a plurality of cylinders 2, which are combined into two groups 3, 4 in terms of exhaust gas.
  • the exhaust gas from the first group 3 is combined in a first exhaust sub-branch 5, the exhaust gas from the second group 4 in a second exhaust sub-branch 6.
  • the two exhaust gas strands 5, 6 are led separately to a common catalyst housing 7, in which a single catalyst brick 8 is arranged.
  • the two partial exhaust gas strands 5, 6 on the inlet side are routed separately up to just in front of the inlet end face 9 of the catalyst brick 8.
  • Two separate exhaust-side partial strands 12, 13 connect to the outlet end 11 of the catalyst brick 8.
  • the inlet areas 14, 15 and the outlet areas 16, 17 of the first and second exhaust gas strands 5, 12; 6, 13 are designed in alignment with one another in the flow direction, so that the exhaust gas of the two groups 3, 4 flows through the catalyst brick 8 in different areas thereof.
  • the inlet regions 14, 15 of the inlet end face 9 are arranged concentrically with respect to the longitudinal axis 8a of the catalyst brick 8. It is just as important that the outlet regions 16, 17 of the outlet end face 11 are formed concentrically to the longitudinal axis 8a of the catalyst brick 8. It is thereby achieved that the exhaust gas of the first exhaust gas strand 5 only has the catalyst brick 8 in a core area, and the exhaust gas of the second exhaust gas strand 5 6 flows through the catalyst brick 8 in an annular peripheral region 19 surrounding the core region 18.
  • the catalyst brick 8 is thus evenly radially loaded by the different pressures in the exhaust lines 5, 6, whereby breaks can be largely avoided.
  • the partial exhaust gas strands 5, 6, 12, 13 are arranged in a tube-in-tube construction in the region of the entry and the exit into or out of the catalyst housing 27, the conical tube 5a of the first exhaust line 5 is inserted and welded into an inlet cone 6a of the second exhaust line 6 on the inlet side.
  • the outlet-side first exhaust gas strand 12 is also inserted into an outlet cone 13a of the outlet-side second exhaust gas strand 13 and welded to it.
  • the inlet and outlet cones 6a, 13a can be designed as castings, the inner tubes 5a, 12a being made in one or more parts with the inlet and outlet cones 6a, 13a.
  • the inner tubes 5a, 12a of the inlet and outlet-side first exhaust gas strand 5 or 12 reach the catalyst brick 8 up to a short distance and are therefore not directly connected to it.
  • a ⁇ probe 20a, 20b is arranged in such a way that the air ratio of the exhaust gas of both partial exhaust gas lines 5, 6 can be determined with this.
  • the ⁇ -probe 20a, 20b can be arranged in the area of the inlet 26a or in the area of the outlet 26b of the first partial exhaust line 5, 12 in or out of the second partial exhaust line 6, 13 such that the exhaust gas flows of both partial exhaust lines 5, 6 ; 12, 13 can be monitored.
  • the ⁇ probe 20a, 20b protrudes into a flow connection 27 between the first and second partial exhaust gas strands 5, 6; 12, 13, which is so small that there is little crosstalk and the gas dynamic activity is not disturbed.
  • the ⁇ probe 20b is used, for example, for diagnostic purposes.
  • a sealing device 21 for sealing the first from the second exhaust gas strand 5, 6; 12, 13 may be provided in the area of the gap s between the inner tube 5a, 12a and the catalyst brick 8.
  • the sealing device 21 can be formed by a labyrinth seal 22, which is formed by at least one concentric step 23 (FIG. 4, FIG. 5) or annular groove formed on the catalyst brick 8 24 (Fig. 6, Fig. 7) is designed.
  • the stage 23 can either in the first or in the second partial exhaust gas stream 5, 6; 12, 13 protruding.
  • a soft material seal 25 can be provided, which is inserted into the groove 24 in FIG. 7.
  • FIG. 9 schematically shows an exhaust gas aftertreatment device 103 arranged in an exhaust line 101 of an exhaust system 102, which has an oxidation catalyst 104, a first particle filter 105 and a second particle filter 106, wherein oxidation catalyst 104, first particle filter 105 and second particle filter 106 are arranged one behind the other in flow direction 108 are.
  • oxidation catalytic converter 104, first particle filter 105 and second particle filter 106 are arranged in a common housing 107.
  • common housing 107 it is also possible to accommodate the three components in common housings.
  • the first particle filter 105 arranged first in the direction of flow 108 is dimensioned such that operation is possible without restriction.
  • the design of the loading and regeneration strategy is based on this first particle filter 105.
  • the second particle filter 106 is provided, which is designed to be significantly smaller than the first particle filter 105.
  • This second particle filter 106 increases the filter efficiency in normal operation and, if the first particle filter 105 is damaged, ensures the necessary filter effect of the entire exhaust gas aftertreatment system 103. Since this second particle filter 106 is loaded significantly less than the first particle filter 105, the need for regeneration is significantly less.
  • the first and second particle filters 105, 106 can also be arranged in separate housings 107.
  • the arrangement in a single housing 107 has the advantage that a sufficiently high soot burn-up takes place in the second particle filter 106 when the first particle filter 105 is regenerated.
  • the state of the first particle filter 105 can be monitored by means of a pressure-sensitive first sensor 109 and a pressure-sensitive second sensor 110 via an electronic control unit 112 by determining the pressure difference. Sudden drop in pressure indicates a filter break. This makes it possible to take measures immediately after damage has occurred.
  • a first pressure sensor 109 can also be placed in front of the oxidation catalytic converter 104, as is indicated by the dashed line.
  • a pressure- or temperature-sensitive third sensor 111 is arranged downstream of the second particle filter 106.
  • filter breaks in the second particle filter can also be detected at an early stage.
  • the third sensor 111 can replace the second sensor 110 or can be used to monitor the second sensor 110. In the event of a malfunction or failure of the second sensor 110, particle filter breaks can still be determined with the aid of the third sensor 111, but cannot be localized exactly.

Abstract

L'invention concerne un système d'échappement (1) pour moteur à combustion interne, qui comprend au moins deux groupes (3, 4) de cylindres (2), chaque groupe (3, 4) étant pourvu d'une conduite partielle d'échappement (5, 6; 12, 13) et les côtés entrée des conduites d'échappement (5, 6) s'étendant séparément jusqu'à un carter de catalyseur (7) commun comportant un seul bloc catalyseur (8). Les côtés entrée des conduites d'échappement (5, 6) s'étendent séparément jusqu'à une face d'entrée (9) du bloc catalyseur (8), de telle sorte que chaque conduite d'échappement partielle (5, 6) agit sur une région d'entrée (14, 15) prédéfinie de la face d'entrée (9) du bloc catalyseur (8). Selon l'invention, la durée de vie du catalyseur peut être augmentée et des ruptures évitées par le fait que les régions d'entrée (14, 15) et/ou les régions de sortie (16, 17) du bloc catalyseur (8) de différentes conduites d'échappement partielles (5, 6; 12, 13) sont disposées sensiblement de façon concentrique l'une par rapport à l'autre.
PCT/AT2005/000093 2004-03-25 2005-03-17 Systeme d'echappement pour moteur a combustion interne WO2005093229A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112005000653T DE112005000653A5 (de) 2004-03-25 2005-03-17 Abgasanlage für eine Brennkraftmaschine

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ATA528/2004 2004-03-25
AT5282004A AT501401B1 (de) 2004-03-25 2004-03-25 Abgasanlage für eine brennkraftmaschine
AT5582004 2004-03-29
ATA558/2004 2004-03-29

Publications (2)

Publication Number Publication Date
WO2005093229A2 true WO2005093229A2 (fr) 2005-10-06
WO2005093229A3 WO2005093229A3 (fr) 2006-01-26

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PCT/AT2005/000093 WO2005093229A2 (fr) 2004-03-25 2005-03-17 Systeme d'echappement pour moteur a combustion interne

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DE (1) DE112005000653A5 (fr)
WO (1) WO2005093229A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2213359A1 (fr) * 2009-01-20 2010-08-04 NGK Insulators, Ltd. Appareil de purification de gaz d'échappement fourni avec un filtre d'auto-diagnostic
DE102018005712B3 (de) 2018-07-19 2019-10-10 Daimler Ag Verbrennungskraftmaschine für ein Kraftfahrzeug, sowie Verfahren zum Betreiben einer solchen Verbrennungskraftmaschine
US11149620B2 (en) * 2017-07-24 2021-10-19 Mazda Motor Corporation Exhaust device for engine
WO2023081168A3 (fr) * 2021-11-04 2023-06-15 Cummins Emission Solutions Inc. Système de post-traitement des gaz d'échappement

Citations (10)

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DE3203237A1 (de) 1982-02-01 1983-08-11 Knecht Filterwerke Gmbh, 7000 Stuttgart Abgasfilter fuer verbrennungsmotoren
JPS6043113A (ja) 1983-08-18 1985-03-07 Mitsubishi Motors Corp デイ−ゼル排出ガス浄化装置
EP0154145A2 (fr) 1984-02-28 1985-09-11 Degussa Aktiengesellschaft Dispositif pour purifier les gaz d'échappement de moteurs Diesel
US4887427A (en) 1985-10-28 1989-12-19 Nissan Motor Company, Limited Exhaust particle removing system for an engine
EP0405310A2 (fr) 1989-06-24 1991-01-02 Degussa Aktiengesellschaft Procédé pour la régénération de filtres à suie pour moteurs diesel
DE9201320U1 (fr) 1992-02-04 1992-03-26 Tasco Gesellschaft Fuer Katalytische Abgasreinigungssysteme Mbh, 5408 Nassau, De
EP0852289A1 (fr) 1997-01-06 1998-07-08 Renault Procédé de gestion d'un moteur à combustion interne et moteur correspondant
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