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EP4390068B1 - Section de mélange pour un système d'échappement d'un moteur à combustion interne - Google Patents

Section de mélange pour un système d'échappement d'un moteur à combustion interne Download PDF

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Publication number
EP4390068B1
EP4390068B1 EP23213185.4A EP23213185A EP4390068B1 EP 4390068 B1 EP4390068 B1 EP 4390068B1 EP 23213185 A EP23213185 A EP 23213185A EP 4390068 B1 EP4390068 B1 EP 4390068B1
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EP
European Patent Office
Prior art keywords
reagent
exhaust
receiving
mixing section
reactant
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.)
Active
Application number
EP23213185.4A
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German (de)
English (en)
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EP4390068A1 (fr
Inventor
Enver Kurpejovic
Florian Friedrich
Manuel Notter
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.)
Eberspaecher Exhaust Technology GmbH and Co KG
Original Assignee
Purem GmbH
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Publication date
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Publication of EP4390068A1 publication Critical patent/EP4390068A1/fr
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Publication of EP4390068B1 publication Critical patent/EP4390068B1/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
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/029—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles by adding non-fuel substances to exhaust
    • F01N3/0293—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles by adding non-fuel substances to exhaust injecting substances in exhaust stream
    • 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

Definitions

  • the present invention relates to a mixing section for an exhaust system of an internal combustion engine for mixing exhaust gas and reactant.
  • a reactant such as a urea/water solution
  • a catalytic reaction such as selective catalytic reduction, is carried out using the reactant to reduce the pollutant content.
  • a mixing section according to the preamble of claim 1 is known from DE 20 2015 102 092 U1 known.
  • two plate-like reactant structural elements of a reactant collecting arrangement which follow one another in a main discharge direction of a reactant discharge unit and have reactant collecting surfaces that are essentially parallel to one another and essentially orthogonal to the main discharge direction, are offset from one another transversely to the main discharge direction and are arranged so as to partially overlap one another.
  • Mutual shielding of the reactant collecting elements against wetting with the reactant injected into the mixing chamber can be further prevented if at least two reactant collecting elements directly adjacent to one another, preferably all immediately adjacent reactant collecting elements, the reactant collecting area of the reactant collecting element positioned closer to the reactant dispensing unit is smaller than the reactant collecting area of the reactant collecting element positioned further away from the reactant dispensing unit.
  • these can be carried on the housing base between the at least two exhaust gas inlet openings.
  • At least one reactant collecting element preferably each reactant collecting element, extends at least partially across at least one exhaust gas inlet opening transversely to the main discharge direction, efficient interaction of a reactant collecting element positioned in this way with the exhaust gas flow is ensured, in particular also for heating the reactant collecting element. It is particularly advantageous if all reactant collecting elements extend at least partially across the same exhaust gas inlet opening transversely to the main discharge direction.
  • the deflection inner surface has a vertex area with maximum distance from the housing base and a substantially vertical projection of the vertex area onto the housing base lies between two exhaust gas inlet openings, two oppositely oriented exhaust gas vortices are generated in the mixing chamber, which further supports the mixing of exhaust gas with reactant injected into the mixing chamber or evaporating from the reactant collecting surfaces.
  • At least one exhaust gas treatment arrangement preferably comprising an oxidation catalyst and/or a particulate filter, can be arranged upstream of the mixing section.
  • At least one exhaust gas treatment arrangement preferably comprising an SCR catalyst, can be arranged downstream of the mixing section.
  • the Fig. 1 to 4 show a portion of an exhaust system of an internal combustion engine in a vehicle, generally designated 10.
  • This portion of the exhaust system 10 comprises a mixing section, generally designated 16, between an upstream exhaust gas treatment arrangement 12, which comprises, for example, an oxidation catalyst and/or a particulate filter, and a downstream exhaust gas treatment arrangement 14, which comprises, for example, an SCR catalyst.
  • exhaust gas A leaving the exhaust gas treatment arrangement 12 is mixed, in the manner described below, with a reactant R injected into a mixing chamber 20 by a reactant delivery unit 18, also generally referred to as an injector, so that a mixture G of exhaust gas A and reactant R flows into the downstream exhaust gas treatment arrangement 14.
  • two exhaust gas inlet openings 34 1 , 34 2 are formed in the housing base 28. Opening center axes M 1 , M 2 of the exhaust gas inlet openings 34 1 , 34 2 are oriented substantially orthogonally to the substantially flat surface 32 of the housing base 28.
  • the exhaust gas A entering the mixing chamber 20 from the upstream exhaust gas treatment arrangement 12 flows through the exhaust gas inlet openings 34 1 , 34 2 substantially in a respective main inflow direction E 1 , E 2 which is approximately parallel to the respective opening center axis M 1 , M 2 .
  • the housing part 24, which together with the housing base 28 defines the mixing chamber 20, is dome-shaped, particularly in the region opposite the housing base 28, and provides a deflection wall 38 with a deflection inner surface 40 facing the mixing chamber 20 and concave with respect to the mixing chamber 20. Due to the dome-shaped shape, the deflection inner surface 40 has an apex region S, in which the deflection inner surface 40 has the maximum distance from the housing base 28 or its substantially flat surface 32.
  • the apex region S can be designed in such a way that, as the Fig. 3 indicates, has an elongated course in the direction of the main discharge direction H or the opening longitudinal axes L 1 , L 2 with an approximately substantially constant distance to the housing base 32.
  • the exhaust gas A introduced into the mixing chamber 20 through the exhaust gas inlet openings 34 1 , 34 2 in the respective main inflow direction E 1 , E 2 is deflected in such a way that two oppositely oriented exhaust gas vortices W 1 , W 2 are created.
  • these exhaust gas vortices W 1 , W 2 can also be formed due to the the exhaust gas inlet openings 34 1 , 34 2 elongated in the same direction generally have a roller-like structure extended in this direction.
  • the reactant dispensing unit 18 is positioned or oriented such that a dispensing location O, at which the reactant R is dispensed in the main dispensing direction H by the reactant dispensing unit 18, when viewed in the main dispensing direction H, is substantially directly opposite the center Z of the outer circumferential contour of the reactant dispensing arrangement 42, which in Fig. 5 is illustrated by a projection arrow P 2.
  • the reactant collecting elements 44 1 , 44 2 , 44 3 are positioned on the housing base 28 such that they extend transversely to the main discharge direction H or also transversely to the longitudinal axes L 1 , L 2 of the opening into the region of the exhaust gas inlet opening 34 2 .
  • This increases the thermal interaction of the reactant collecting elements 44 1 , 44 2 , 44 3 with the exhaust gas A flowing into the mixing chamber 20, so that rapid heating of the reactant collecting elements 44 1 , 44 2 , 44 3 is ensured, which supports the evaporation of the reactant.
  • this positioning of the reactant collecting elements 44 1 , 44 2 , 44 3 enables the previously mentioned alignment of the center Z of the outer circumferential contour of the reactant collecting arrangement 42 with the discharge location O or the main discharge direction H in coordination with the positioning of the reactant discharge unit 18 on the housing part 24.
  • the reactant collecting elements 44 1 , 44 2 , 44 3 could be designed such that they also extend into the region of the exhaust gas inlet opening 34 1 . This could be particularly advantageous if the reactant discharge unit 18 is positioned on the mixing section housing 22 such that the discharge location O is located substantially centrally between the two exhaust gas inlet openings 34 1 , 34 2 .
  • exhaust gas A which is essentially uniformly mixed with reactant R flows, for example, through a transition housing 52 into the downstream exhaust gas treatment arrangement 14 and can thus interact essentially uniformly with the catalytically active material provided therein over its cross-section to carry out the intended exhaust gas purification function.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Sampling And Sample Adjustment (AREA)

Claims (17)

  1. Une section de mélange pour un système d'échappement d'un moteur à combustion interne, pour mélanger des gaz d'échappement (A) et un réactif (R), comprenant :
    - un boîtier de section de mélange (22), renfermant une chambre de mélange (20), avec un fond de boîtier (28), dans lequel au moins une ouverture d'entrée de gaz d'échappement (341, 342) pour l'admission de gaz d'échappement (A) dans la chambre de mélange (20) est prévue dans le fond de boîtier (28),
    - une unité de distribution de réactif (18) pour distribuer du réactif (R) dans la chambre de mélange (20) sensiblement dans une direction de distribution principale (H),
    - un dispositif de réception de réactif (42) destiné à recevoir le réactif (R) distribué dans la chambre de mélange (20), le dispositif de réception de réactif (42) comprenant une pluralité d'éléments de réception de réactif (441, 442, 443) se succédant dans la direction de distribution principale (H), chaque élément de réception de réactif (441, 442, 443) présentant une zone de réception de réactif (461, 462, 463) positionnée face à l'unité de distribution de réactif,
    - caractérisé en ce qu'une pluralité d'ouvertures de passage (481, 482, 483) sont formées dans au moins un élément de réception de réactif (441, 442, 443).
  2. La section de mélange selon la revendication 1, caractérisée en ce qu'au moins un élément de réception de réactif (441, 442, 443), de préférence chaque élément de réception de réactif (441, 442, 443) est formé en forme de plaque et présente une zone de réception de réactif sensiblement plate (461, 462, 463), ou/et en ce qu'une pluralité d'ouvertures de passage (481, 482, 483) sont formées dans chaque élément de réception de réactif (441, 442, 443).
  3. La section de mélange selon la revendication 1 ou 2, caractérisée en ce que dans le cas d'au moins un élément de réception de réactif (441, 442, 443), de préférence dans le cas de chaque élément de réception de réactif (441, 442, 443), la zone de réception de réactif (461, 462, 463) est orientée sensiblement orthogonalement à la direction principale de distribution (H) ou/et est orientée sensiblement parallèlement à un axe central (M1, M2) de ladite au moins une ouverture d'entrée de gaz d'échappement (341, 342), ou/et en ce qu'au moins deux zones de réception de réactifs (461, 462, 463), de préférence toutes les zones de réception de réactifs (461, 462, 463), sont sensiblement parallèles les unes aux autres.
  4. La section de mélange selon l'une des revendications 1 à 3, caractérisée en ce que dans le cas d'au moins deux éléments de réception de réactifs (441, 442, 443) directement adjacents l'un à l'autre, de préférence dans le cas de tous les éléments de réception de réactifs (441, 442, 443) directement adjacents l'un à l'autre, la zone de réception de réactif (461, 462) de l'élément de réception de réactif (441, 442) positionné plus près de l'unité de distribution de réactif (18) est plus petite que la zone de réception de réactif (462, 463) de l'élément de réception de réactif (442, 443) positionné plus loin de l'unité de distribution de réactif (18).
  5. La section de mélange selon l'une des revendications 1 à 4, caractérisée en ce que dans le cas d'au moins deux éléments récepteurs de réactifs (441, 442, 443) directement adjacents l'un à l'autre, de préférence dans le cas de tous les éléments récepteurs de réactifs (441, 442, 443) directement adjacents l'un à l'autre, la zone de réception de réactif (461, 462) de l'élément de réception de réactif (441, 442) positionné plus près de l'unité de distribution de réactif (18) est sensiblement complètement recouverte à angle droit par rapport à la direction de distribution principale (H) par la zone de réception de réactif (462, 463) de l'élément de réception de réactif (442, 443) positionné plus loin de l'unité de distribution de réactif (18).
  6. La section de mélange selon l'une des revendications 1 à 5, caractérisée en ce que la taille des zones de réception de réactif (461, 462, 463) des éléments de réception de réactif (441, 442, 443) augmente dans la direction de distribution principale (H).
  7. La section de mélange selon l'une des revendications 1 à 6, caractérisée en ce qu'un emplacement de distribution (O) de l'unité de distribution de réactif (18) est positionné dans au moins une direction perpendiculaire à la direction de distribution principale (H) sensiblement au centre par rapport à un contour périphérique extérieur du dispositif de réception de réactif (H).
  8. La section de mélange selon la revendication 6 et la revendication 7, caractérisée en ce que le contour périphérique extérieur du dispositif de réception de réactif (42) correspond sensiblement à un contour périphérique extérieur de l'élément de réception de réactif (443) ayant la plus grande surface de réception de réactif (463).
  9. La section de mélange selon l'une des revendications 1 à 8, caractérisée en ce qu'au moins une ouverture d'entrée de gaz d'échappement (341, 342), de préférence chaque ouverture d'entrée de gaz d'échappement (341, 342), est allongée dans la direction d'un axe longitudinal (L1, L2) de celle-ci qui est de préférence sensiblement parallèle à la direction de distribution principale (H), de préférence dans lequel au moins deux ouvertures d'entrée de gaz d'échappement (341, 342) allongées dans la direction d'un axe longitudinal respectif (L1, L2) de celles-ci, avec des axes longitudinaux (L1, L2) sensiblement parallèles l'un à l'autre et se chevauchant au moins partiellement, de préférence sensiblement complètement, dans la direction des axes d'ouverture longitudinaux (L1, L2) de celles-ci, sont prévues dans le fond de boîtier (28).
  10. Section de mélange selon la revendication 9, caractérisée en ce que les éléments récepteurs de réactifs (441, 442, 443) sont supportés sur le fond de boîtier (28) entre les au moins deux ouvertures d'entrée des gaz d'échappement (341, 342).
  11. La section de mélange selon l'une des revendications 1 à 10, caractérisée en ce qu'au moins un élément de réception de réactif (441, 442, 443), de préférence chaque élément de réception de réactif (441, 442, 443), s'étend au moins partiellement à travers au moins une ouverture d'entrée de gaz d'échappement (342) à angle droit par rapport à la direction principale de distribution (H), de préférence dans laquelle tous les éléments de réception de réactif (441, 442, 443) s'étendent au moins partiellement à travers la même ouverture d'entrée de gaz d'échappement (342) à angle droit par rapport à la direction principale de distribution (H).
  12. La section de mélange selon l'une des revendications 1 à 11, caractérisée en ce que le boîtier de section de mélange (22) présente une paroi de déviation des gaz d'échappement (38), située à l'opposé du fond de boîtier (28), avec une surface de déviation interne concave (40) tournée vers la chambre de mélange (20).
  13. La section de mélange selon la revendication 12, caractérisée en ce que la surface de déviation interne (40) présente une région de sommet (S) avec un espacement maximal par rapport au fond de boîtier (28), et en ce qu'une projection sensiblement verticale de la région de sommet (S) sur le fond de boîtier (28) est située entre deux ouvertures d'entrée des gaz d'échappement (341, 342).
  14. La section de mélange selon la revendication 9 et la revendication 13, caractérisée en ce que la région de sommet (S) est allongée dans la direction de l'axe longitudinal (L1, L2) de ladite au moins une ouverture d'entrée de gaz d'échappement (341, 342), ou/et dans la direction de distribution principale (H).
  15. La section de mélange selon l'une des revendications 1 à 14, caractérisée en ce que le boîtier de section de mélange (22) présente une ouverture de sortie des gaz d'échappement (50), dans laquelle une direction d'écoulement principale (E1, E2) des gaz d'échappement (A) s'écoulant à travers au moins une ouverture d'entrée des gaz d'échappement (341, 342) est sensiblement orthogonale à une direction d'écoulement principale des gaz d'échappement (A) et/ou du réactif (R) s'écoulant à travers l'ouverture de sortie des gaz d'échappement (50).
  16. Un système d'échappement pour un moteur à combustion interne, comprenant une section de mélange (16) selon l'une des revendications 1 à 15.
  17. Le système d'échappement selon la revendication 16, caractérisé en ce qu'au moins un dispositif de traitement des gaz d'échappement (12), comprenant de préférence un convertisseur catalytique d'oxydation et/ou un filtre à particules, est disposé en amont de la section de mélange (16), et/ou en ce qu'au moins un dispositif de traitement des gaz d'échappement (14), comprenant de préférence un convertisseur catalytique SCR, est disposé en aval de la section de mélange (16).
EP23213185.4A 2022-12-19 2023-11-30 Section de mélange pour un système d'échappement d'un moteur à combustion interne Active EP4390068B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022133786.3A DE102022133786A1 (de) 2022-12-19 2022-12-19 Mischsektion für eine Abgasanlage einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP4390068A1 EP4390068A1 (fr) 2024-06-26
EP4390068B1 true EP4390068B1 (fr) 2025-04-09

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EP23213185.4A Active EP4390068B1 (fr) 2022-12-19 2023-11-30 Section de mélange pour un système d'échappement d'un moteur à combustion interne

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US (1) US20240200483A1 (fr)
EP (1) EP4390068B1 (fr)
CN (1) CN118223972A (fr)
DE (1) DE102022133786A1 (fr)

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FR2977632A1 (fr) * 2011-07-05 2013-01-11 Faurecia Sys Echappement Ensemble de purification de gaz d'echappement, avec impacteurs montes sur un deflecteur
FR3020834B1 (fr) * 2014-05-07 2016-06-24 Faurecia Systemes D'echappement Ensemble de purification de gaz d'echappement
FR3020835B1 (fr) * 2014-05-07 2016-06-24 Faurecia Systemes D'echappement Ensemble de purification de gaz d'echappement et ligne d'echappement comprenant un tel ensemble
FR3068730B1 (fr) * 2017-07-04 2020-02-14 Faurecia Systemes D'echappement Dispositif d'injection pour une ligne d'echappement de vehicule et ligne d'echappement correspondante
KR20230166745A (ko) * 2022-05-31 2023-12-07 현대자동차주식회사 디젤차량의 요소수 믹싱챔버

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US20240200483A1 (en) 2024-06-20
EP4390068A1 (fr) 2024-06-26
CN118223972A (zh) 2024-06-21
DE102022133786A1 (de) 2024-06-20

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