EP3851646B1 - Mélangeur gaz/gaz permettant d'introduire du gaz au flux de gaz d'échappement d'un moteur à combustion interne - Google Patents

Mélangeur gaz/gaz permettant d'introduire du gaz au flux de gaz d'échappement d'un moteur à combustion interne Download PDF

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Publication number
EP3851646B1
EP3851646B1 EP21150148.1A EP21150148A EP3851646B1 EP 3851646 B1 EP3851646 B1 EP 3851646B1 EP 21150148 A EP21150148 A EP 21150148A EP 3851646 B1 EP3851646 B1 EP 3851646B1
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EP
European Patent Office
Prior art keywords
gas
flow
mixer body
exhaust gas
body part
Prior art date
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Active
Application number
EP21150148.1A
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German (de)
English (en)
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EP3851646A1 (fr
Inventor
Enver Kurpejovic
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
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Purem GmbH
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Publication of EP3851646A1 publication Critical patent/EP3851646A1/fr
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Publication of EP3851646B1 publication Critical patent/EP3851646B1/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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • 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
    • F01N3/30—Arrangements for supply of additional air
    • 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
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus

Definitions

  • the present invention relates to a gas/gas mixer according to the preamble of claim 1, with which gas can be introduced into the exhaust gas flow of an internal combustion engine.
  • a gas/gas mixer in which a mixer body with a droplet-like cross section protrudes into an exhaust gas flow channel formed in a tubular exhaust gas guiding element.
  • the mixer body can be flowed around by exhaust gas flowing in the exhaust gas duct in the manner of an aerofoil and has a plurality of gas discharge openings, via which gas flowing through a gas supply volume inside the mixer body is discharged into the exhaust gas stream flowing around the mixer body.
  • a gas / gas mixer according to the preamble of claim 1 is from DE 10 2013 221 428 A1 known.
  • This gas/gas mixer comprises a first mixer body part arranged in an upstream direction and a second mixer body part arranged in a downstream direction.
  • a volume is formed between these two mixer body parts, into which a liquid or gas can be introduced by means of an injector and can be mixed with an exhaust gas flow passing through this volume.
  • a plurality of through-flow holes are provided in the second mixer body part, through which exhaust gas that may be mixed with a gas or a liquid can leave the volume formed between the two mixer body parts.
  • Flow openings are also formed in the first mixer body part, through which exhaust gas flowing in an exhaust gas flow channel onto this can flow into the volume formed between the two mixer body parts.
  • a gas/gas mixer for introducing gas, for example air or burner exhaust gas, into the exhaust gas stream of an internal combustion engine according to claim 1, comprising an exhaust gas flow channel in an exhaust gas routing element through which exhaust gas can flow, a mixer body arranged in the exhaust gas routing element and having a plurality of of exhaust gas flowing through the exhaust gas flow channel through which exhaust gas flow openings can flow, wherein a gas supply volume through which gas to be introduced into the exhaust gas flow can flow is formed in the mixer body, and wherein the gas supply volume is open to the exhaust gas flow channel via a plurality of gas discharge openings.
  • the gas/gas mixer not only has the gas discharge openings through which the exhaust gas to be introduced into the exhaust gas flow is discharged, but also has exhaust gas flow openings through which the or at least a substantial part of the exhaust gas flowing in the exhaust gas flow channel flows through.
  • the mixer body is plate-like and is arranged in the exhaust gas guide element transversely to a main exhaust gas flow direction of the exhaust gas flowing through the exhaust gas flow channel.
  • the gas supply volume is provided in the mixer body in that the mixer body has a first mixer body part oriented in the exhaust gas guide element in the upstream direction and one in the Exhaust gas routing element in the direction downstream oriented arranged second mixer body part comprises, wherein the gas supply volume is formed substantially between the first mixer body part and the second mixer body part.
  • the first mixer body part can be designed essentially plate-like and the second mixer body part can be designed essentially plate-like.
  • plate-like refers to a structure of the mixer body or the mixer body parts in which they have a significantly smaller thickness than their extent transverse to the thickness direction.
  • a fastening area fixed to the exhaust gas routing element be provided on one of the mixer body parts, preferably the second mixer body part, and that a fastening area fixed to the one mixer body part be provided on the other mixer body part, preferably the first mixer body part second attachment area is provided.
  • the first fastening area can comprise a, preferably essentially cylindrical, fastening edge fixed on an inner peripheral surface of the exhaust gas routing element in an outer peripheral area of one mixer body part
  • the second fastening area can have a, preferably essentially cylindrical, fastening edge fixed on a mixer body part in an outer peripheral area of the other mixer body part.
  • a plurality of throughflow holes are provided in the second mixer body part, and in the first mixer body part one is then assigned to each throughflow hole of the second mixer body part towards the second mixer body part extending and exhaust gas in the direction of the associated flow hole, providing a flow channel of the first mixer body part providing, preferably tubular or funnel-like, flow formation is provided.
  • Efficient mixing of exhaust gas and the gas to be introduced into it can be further supported by forming a gas discharge opening between a through-flow edge area of the second mixer body part surrounding the through-flow hole in the second mixer body part and the through-flow molding of the first mixer body part in at least one, preferably every exhaust gas through-flow opening .
  • the gas discharge openings thus have a ring-like structure and, with this ring-like structure, each bypass a region in which exhaust gas flowing through a respective exhaust gas through-flow opening is guided.
  • At least one gas discharge opening can be provided in the second mixer body part between the through-flow holes provided in the second mixer body part. At least one can continue Gas discharge opening may be provided in the first mixer body part, preferably in the area of at least one flow-through formation.
  • the through-flow formation can rest against a through-flow hole edge area of the second mixer body part surrounding the through-flow hole in the second mixer body part, preferably in such a way that the gas supply volume in the Area of this exhaust gas flow opening is closed against the escape of gas substantially.
  • the first mixer body part is a formed sheet metal part and/or that the second mixer body part is a formed sheet metal part.
  • a gas supply channel guided through a wall of the exhaust gas guiding element can be open to the gas supply volume on an outer peripheral region of the mixer body.
  • Efficient mixing of gas and exhaust gas can further be ensured by arranging the mixer body in the exhaust gas guide element in such a way that exhaust gas in the exhaust gas flow channel in the area of the mixer body essentially only flows through the exhaust gas flow openings. This ensures that essentially all of the exhaust gas flowing in the exhaust gas flow channel flows through the exhaust gas flow openings provided in the mixer body and is thus conducted into an area in which the gas to be introduced into the exhaust gas exits the mixer body.
  • the invention also relates to an exhaust system for an internal combustion engine of a vehicle, comprising a gas/gas mixer with a structure according to the invention.
  • the 1 shows a gas/gas mixer 12 arranged in an exhaust system 10 of an internal combustion engine.
  • the gas/gas mixer 12 comprises a tubular, for example essentially cylindrical, exhaust gas routing element 14 which delimits an exhaust gas flow channel 18 with a tubular wall 16 .
  • exhaust gas A flows essentially in a main exhaust gas flow direction H along the exhaust gas routing element 14.
  • the exhaust gas main flow direction H can essentially also correspond to the longitudinal extension direction or a longitudinal center axis L of the tubular exhaust gas routing element 14 .
  • the mixer body 20 comprises two mixer body parts 22, 24.
  • the first mixer body part 22 is basically arranged in the exhaust gas flow duct 18 in such a way that it is oriented in the upstream direction, so that the exhaust gas A flowing towards the mixer body 20 in the main exhaust gas flow direction H first flows onto the first mixer body part 22 impinges.
  • the second mixer body part 24 is oriented in the exhaust flow passage 18 toward the downstream direction and is thus positioned substantially on the downstream side of the first mixer body part 22 .
  • the two mixer body parts 22, 24 are also plate-like and are provided, for example, as sheet metal parts.
  • the outer peripheral contour of the second mixer body part 24 is adapted to the inner peripheral contour of the wall 16 of the tubular exhaust gas routing element 14 . If the exhaust gas routing element 14 has, for example, a circular inner peripheral contour in the area in which the mixer body 20 is positioned, the outer peripheral contour of the second mixer body part is then advantageously equally circular.
  • the second mixer body part 20 For attachment to the wall 16 of the exhaust gas routing element 14, the second mixer body part 20 has in an outer peripheral region 26 thereof a fastening edge 28 which is bent in the exhaust gas main flow direction H and preferably runs all the way around in the peripheral direction.
  • the fastening edge 18 is fixed by welding 30 to the inner surface of the wall 16 of the exhaust gas routing element 14, so that when the fastening edge 28 is completely circumferential in the circumferential direction, it is not possible for exhaust gas to pass between the wall 16 of the exhaust gas routing element 14 and the second mixer body part 24 is.
  • the first mixer body part 22 is fixed to the upstream side of the plate-like second mixer body part 24 .
  • the first mixer body part 22 has an outer peripheral contour which approximately corresponds to the outer peripheral contour of the second mixer body part 24 or the inner peripheral contour of the exhaust gas routing element, but is dimensioned smaller than the second mixer body part 24.
  • the first mixer body part 24 In its outer peripheral region 32, the first mixer body part 24 has a Main flow direction H bent, in the circumferential direction preferably completely circumferential fastening edge 34. This is fixed by welding 36 on the side of the second mixer body part 24 oriented in the upstream direction.
  • the two mixer body parts 22, 24 could also be designed in such a way that the first mixer body part 22 is dimensioned somewhat larger than the second mixer body part 24 and has a fastening edge 34 that extends to a greater extent in the main exhaust gas flow direction H. This can then encompass the fastening edge 28 of the second mixer body part 24 on its outside, so that the second mixer body part 24 can be inserted into the first mixer body part 22 .
  • the fastening edge 34 of the first mixer body part 22 is fixed by welding to the wall 16 of the exhaust gas routing element 14, and the fastening edge 28 of the second mixer body part 24 is fixed by welding to the fastening edge 34 of the first mixer body part 22 and/or to the wall 16 of the exhaust gas routing element 14.
  • the two fastening edge regions 34, 28 can be dimensioned such that they end approximately in the same region in the exhaust gas main flow direction H and are connected to the wall 16 of the exhaust gas routing element 14 by a joint weld.
  • a gas supply volume 38 is formed between the two mixer body parts 22 , 24 .
  • a gas supply line 40 through the wall 16 of the exhaust gas routing element 14 and the fastening edge 34 of the first mixer body part 22 and thus, for example, in each case firmly and gas-tightly connected by welding.
  • the exhaust gas supply line 40 there is a gas supply channel 42 which opens into the gas supply volume 38 and through which gas G to be introduced into the exhaust gas A is conducted into the gas supply volume 38 .
  • a through-flow formation 50 is provided on the first mixer body part 22 in association with each through-flow hole 48 in the second mixer body part 24 .
  • This can be provided, for example, as a duct and, with its tubular or funnel-like structure, provides a flow channel 52 for the exhaust gas A. Due to the constriction of the flow cross section occurring in the area of the exhaust gas flow openings 44, the exhaust gas A flowing through the exhaust gas flow openings 44 is accelerated as it passes through the exhaust gas flow openings A, so that the flow velocity increases.
  • the first mixer body part 22 is dimensioned or shaped in the area of its flow-through formations 50 such that an annular intermediate space providing a gas discharge opening 56 is formed between the downstream end regions 54 of the flow-through formations 50 and the associated through-flow hole edge regions 46 .
  • the gas G introduced into the gas supply volume 38 exits the gas supply volume via these ring-shaped gas discharge openings 56 38 and thus enters the stream of exhaust gas A flowing through the through-flow formations 50 or in the through-flow channels 52. Due to the fact that the exhaust gas A is accelerated in the area of the exhaust gas through-flow openings 44 and when passing through the through-flow holes 48 or downstream of which a turbulence arises, the gas G introduced into the exhaust gas flow in these areas is efficiently mixed with the exhaust gas A.
  • the through-flow formations 50 are dimensioned or matched to the through-flow holes 48 in such a way that they have smaller dimensions than the through-flow holes 48, particularly in the region of their downstream ends 54, it is ensured that the exhaust gas A flowing through the through-flow channels 52 flows through the through-flow holes 48 is passed through so that no exhaust gas A can get into the gas supply volume 38 via the gas discharge openings 56, even if, as in 1 shown, the through-flow cutouts 50 in the exhaust gas main flow direction H end in front of the second mixer body part 24 and thus already in front of the through-flow holes 48 .
  • the 2 shows a modified embodiment of the exhaust gas mixer 12.
  • the structure corresponds to the structure described above.
  • the two mixer body parts 22, 24 are designed, for example, as plate-like sheet metal parts.
  • the second mixer body part 24 is fixed with its fastening edge 28 to the wall 16 of the exhaust gas routing element 14 by welding 30, and the first mixer body part 22 is fixed with its fastening edge 34 to the second mixer body part 24 by welding 36, so that between the two mixer body parts 22, 24 the Gas supply volume 38 is formed.
  • the flow-through formations 50 are shaped or matched to the flow-through holes 48 assigned to them in such a way that the downstream end regions 54 of the flow-through formations 50 rest against the through-flow edge areas 46 of the respectively assigned flow-through holes 48 .
  • the flow-through formations 50 adjoin the associated flow-through hole edge regions 46 essentially no intermediate space is formed, so that an escape of gas G from the gas supply volume 38 directly in the area of the exhaust gas through-flow openings 44 is essentially not provided is.
  • the flow-through formations 50 can be pressed with their downstream end regions 54 against the assigned through-flow hole edge regions 46 , so that a substantially gas-tight seal is created.
  • gas leaks in these areas caused by manufacturing tolerances are basically harmless, since on the one hand the gas/gas mixer 12 is intended anyway to introduce the gas G into the exhaust gas A, and on the other hand a significant gas leak will not occur in these areas.
  • a material connection of the two mixer body parts 22, 24 in the area of the downstream end areas 54 of the through-flow formations 50 with the through-flow hole edge areas 46 of the second mixer body part 24 can in principle be provided, but is not required.
  • the shape of the two mixer body parts 22, 24 can also have a significant influence on the dimensioning of the mixer body 20.
  • the size of the gas supply volume 38 can be influenced by the length of the flow-through formations 50 or the fastening edge 34 of the first mixer body part 22 .
  • the gas supply volume 38 in the exhaust gas main flow direction H has a greater extent, the mixer body 22 in the embodiment of FIG 2 made flatter by a corresponding shaping of the first mixer body part 22 .
  • Gas discharge openings 56 can thus be connected both to the in 1 illustrated ring-like structure in the area of the exhaust gas flow openings 44, as well as with the 2 shown hole-like structure in the area between the exhaust gas flow openings 44 may be provided.
  • some of the exhaust gas through-flow openings 44 can be designed as shown in FIG 1 shown, i.e. with a gas discharge opening 56 provided in association therewith, while other exhaust gas through-flow openings 44 can be designed as in FIG 2 shown, ie without an associated gas discharge opening.
  • the second mixer body part 24 is shaped in such a way that the through-flow hole edge region 46 surrounding the through-flow hole 48 counter to the exhaust gas main flow direction H is bent, for example, is provided as a passage.
  • the through-flow hole edge region 46 is shaped or dimensioned in such a way that it provides a larger opening cross section than the through-flow molding 50 on the first mixer body part 22.
  • the dimensioning is such that the through-flow molding 50 in the area of the through-flow hole 48 extends into that of the through-flow hole edge area 46 surrounded volume extends and overlaps with the flow hole edge region 46 in the exhaust gas main flow direction A.
  • the ring-like intermediate space formed between the through-flow hole edge region 46, which is bent counter to the exhaust gas main flow direction H, and the through-flow formation 50 provides a gas discharge opening 56 which, as in the embodiment example in FIG 1 , basically has a ring-like shape and via which the gas G supplied via the gas supply volume 38 is introduced into the exhaust gas A flowing through the exhaust gas flow channel 52 in the first mixer body part 22 .
  • a gas discharge opening 56 which, as in the embodiment example in FIG 1 , basically has a ring-like shape and via which the gas G supplied via the gas supply volume 38 is introduced into the exhaust gas A flowing through the exhaust gas flow channel 52 in the first mixer body part 22 .
  • the gas/gas mixer 12 illustrated in the figures may be modified in various aspects without departing from the principles of the present invention.
  • the flow-through formations 50 can also be dimensioned such that they extend into or through the flow-through holes 48 .
  • one or more gas discharge openings 56 can be provided alternatively or additionally in the area of the flow-through formations 50, as is shown in 2 is indicated.
  • the exhaust gas through-flow openings 44 can have a circular opening cross section, for example, but can also be elliptical, oval or provided with a different cross-sectional geometry. The same applies to the Gas discharge openings 56.
  • the two mixer body parts 22, 24 can act as integral components of a component provided by forming a sheet metal blank, which can be folded over itself and then secured to one another in areas, for example by welding.
  • the mixer according to the invention it is possible to introduce gas G into the exhaust gas flow over the entire cross section of the exhaust gas flow channel 18 and to mix it efficiently with the exhaust gas flowing in the exhaust gas flow channel 18 .
  • the gas G to be added to the exhaust gas A can be, for example, the exhaust gas provided by a burner, which can ensure faster heating in a starting phase of the combustion operation of an internal combustion engine when the catalyst arrangement is still cold downstream of the gas/gas mixer.
  • any other type of gas for example air, could also be added to the exhaust gas flow in order to obtain improved operating characteristics in the system areas downstream of the gas/gas mixer 12 .

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

Claims (14)

  1. Mélangeur gaz/gaz pour l'introduction de gaz dans le flux de gaz d'échappement d'un moteur à combustion interne, comprenant un conduit d'écoulement des gaz d'échappement (18) dans un élément de transport de gaz d'échappement (14), à travers lequel le gaz d'échappement (A) peut s'écouler, un corps de mélangeur (20) disposé dans l'élément de transport de gaz d'échappement (14) avec une pluralité d'ouvertures d'écoulement de gaz d'échappement (44), à travers lequel le gaz d'échappement (A) s'écoulant dans le conduit d'écoulement de gaz d'échappement (18) peut s'écouler, dans lequel un volume d'alimentation en gaz (38), à travers lequel le gaz (G) à introduire dans le flux de gaz d'échappement (A) peut s'écouler, est formé dans le corps de mélangeur (20), et dans lequel le volume d'alimentation en gaz (38) est ouvert vers le conduit d'écoulement de gaz d'échappement (18) via une pluralité d'ouvertures de libération de gaz (56), dans lequel le corps de mélangeur (20) comprend une première partie de corps de mélangeur (22) qui est disposée orientée dans la direction amont dans l'élément de transport de gaz d'échappement (14) et une deuxième partie de corps de mélangeur (24) qui est disposée dans la direction aval dans l'élément de transport de gaz d'échappement (14), dans lequel le volume d'alimentation en gaz (38) est formé essentiellement entre la première partie de corps de mélangeur (22) et la deuxième partie de corps de mélangeur (24), dans lequel une pluralité d'ouvertures de passage (48) sont prévus pour fournir les ouvertures d'écoulement de gaz d'échappement (44) dans la deuxième partie de corps de mélangeur (24), caractérisé en ce qu'un renflement de passage (50) s'étendant vers la deuxième partie de corps de mélangeur (24), transportant le gaz d'échappement (A) dans la direction de l'ouverture de passage associé (48) et fournissant un conduit d'écoulement (52) de la première partie de corps de mélangeur (22), est prévu dans la première partie de corps de mélangeur (22) en association avec chaque ouverture de passage (48) de la deuxième partie de corps de mélangeur (24).
  2. Mélangeur gaz/gaz selon la revendication 1, caractérisé en ce que le corps de mélangeur (20) a une configuration en forme de plaque et est disposé dans l'élément de transport de gaz d'échappement (14) de manière oblique par rapport à une direction d'écoulement principal de gaz d'échappement (H) du gaz d'échappement (A) s'écoulant à travers le conduit d'écoulement de gaz d'échappement (18).
  3. Mélangeur gaz/gaz selon la revendication 2, caractérisé en ce que la première partie de corps de mélangeur (22) a une configuration essentiellement en forme de plaque, et en ce que la deuxième partie de corps de mélangeur (24) a une configuration essentiellement en forme de plaque.
  4. Mélangeur gaz/gaz selon l'une des revendications 1 à 3, caractérisé en ce qu'une zone de fixation fixée à l'élément de transport de gaz d'échappement (14) est prévue au niveau de l'une des parties de corps de mélangeur, de préférence au niveau de la deuxième partie de corps de mélangeur (24), et en ce qu'une deuxième zone de fixation fixée à l'une des parties de corps de mélangeur est prévue au niveau de l'autre partie de corps de mélangeur, de préférence au niveau de la première partie de corps de mélangeur (22).
  5. Mélangeur gaz/gaz selon la revendication 4, caractérisé en ce que la première zone de fixation comprend un bord de fixation (28) de préférence essentiellement cylindrique, qui est fixé à une surface circonférentielle intérieure de l'élément de transport de gaz d'échappement (14), dans une zone circonférentielle extérieure (26) de la première partie de corps de mélangeur.
  6. Mélangeur gaz/gaz selon la revendication 4 ou 5, caractérisé en ce que la deuxième zone de fixation comprend un bord de fixation (34) de préférence essentiellement cylindrique, qui est fixé à l'une des parties de corps de mélangeur, dans une zone circonférentielle extérieure (32) de l'autre partie de corps de mélangeur.
  7. Mélangeur gaz/gaz selon l'une des revendications 1 à 6, caractérisé en ce que les renflements de passage (50) prévus dans la première partie de corps de mélangeur (22) en association avec les ouvertures de passage (48) de la deuxième partie de corps de mélangeur (24) sont tubulaires ou en forme d'entonnoir.
  8. Mélangeur gaz/gaz selon l'une des revendications 1 à 7, caractérisé en ce que dans au moins une, de préférence dans chaque ouverture d'écoulement de gaz d'échappement (44), une ouverture de libération de gaz (56) est formée entre une zone de bord d'ouverture d'écoulement (46) de la deuxième partie de corps de mélangeur (24), laquelle zone de bord d'ouverture d'écoulement entoure une ouverture d'écoulement (48) dans la deuxième partie de corps de mélangeur (24), et le renflement d'écoulement (50) de la première partie de corps de mélangeur (22).
  9. Mélangeur gaz/gaz selon l'une des revendications 1 à 8, caractérisé en ce qu'au moins une ouverture de libération de gaz (56) est prévue dans la deuxième partie de corps de mélangeur (24) entre les ouvertures de passage (48) prévus dans la deuxième partie de corps de mélangeur (24), ou/et en ce qu'au moins une ouverture de libération de gaz (56) est prévue dans la première partie de corps de mélangeur (22), de préférence dans la zone d'au moins un renflement de passage (50).
  10. Mélangeur gaz/gaz selon la revendication 9, caractérisé en ce que dans au moins une, de préférence dans chaque ouverture d'écoulement de gaz d'échappement (44), le renflement d'écoulement (50) est en contact avec une zone de bord d'ouverture d'écoulement (46) de la deuxième partie de corps de mélangeur (24), laquelle zone de bord d'ouverture d'écoulement entoure l'ouverture d'écoulement (48) dans la deuxième partie de corps de mélangeur (22) de préférence de telle sorte que le volume d'alimentation en gaz (38) est essentiellement fermé contre la décharge de gaz (G) dans la zone de cette ouverture d'écoulement de gaz d'échappement (44).
  11. Mélangeur gaz/gaz selon l'une des revendications 1 à 10, caractérisé en ce que la première partie de corps de mélangeur (22) est une pièce de tôle façonnée, ou/et en ce que la deuxième partie de corps de mélangeur (24) est une pièce de tôle façonnée.
  12. Mélangeur gaz/gaz selon l'une des revendications précédentes, caractérisé en ce qu'au niveau d'une zone circonférentielle extérieure du corps de mélangeur (20), un conduit d'alimentation en gaz (42), qui est passé à travers une paroi (16) de l'élément de transport de gaz d'échappement (14), est ouvert vers le volume d'alimentation en gaz (38).
  13. Mélangeur gaz/gaz selon l'une des revendications précédentes, caractérisé en ce que le corps de mélangeur (20) est disposé dans l'élément de transport de gaz d'échappement (12) de telle sorte que le gaz d'échappement (A) ne s'écoule essentiellement que par les ouvertures d'écoulement de gaz d'échappement (44) dans le conduit d'écoulement de gaz d'échappement (18) dans la zone du corps de mélangeur (20).
  14. Système d'échappement pour un moteur à combustion interne d'un véhicule, comprenant un mélangeur gaz/gaz (12) selon l'une des revendications précédentes.
EP21150148.1A 2020-01-20 2021-01-05 Mélangeur gaz/gaz permettant d'introduire du gaz au flux de gaz d'échappement d'un moteur à combustion interne Active EP3851646B1 (fr)

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DE102020101134.2A DE102020101134A1 (de) 2020-01-20 2020-01-20 Gas/Gas-Mischer zum Einleiten von Gas in den Abgasstrom einer Brennkraftmaschine

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EP3851646B1 true EP3851646B1 (fr) 2023-02-22

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Citations (1)

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Publication number Priority date Publication date Assignee Title
DE102013221428B4 (de) * 2013-10-22 2016-02-18 Eberspächer Exhaust Technology GmbH & Co. KG Katalysatoranordnung mit Injektionsabschnitt

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DE102013215632A1 (de) 2012-08-08 2014-02-13 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Abgasbehandlungssystem für einen Verbrennungsmotor
EP2865861B2 (fr) * 2013-10-22 2019-05-15 Eberspächer Exhaust Technology GmbH & Co. KG Système de catalyseur avec section d'injection
DE102014222698B4 (de) * 2014-11-06 2017-12-14 Eberspächer Exhaust Technology GmbH & Co. KG Abgasnachbehandlungseinrichtung mit Injektionsabschnitt
US10179315B2 (en) * 2015-06-12 2019-01-15 Donaldson Company, Inc. Exhaust treatment device
US10035102B2 (en) 2015-11-18 2018-07-31 Ford Global Technologies, Llc System for a urea mixer
DE102016104361A1 (de) * 2016-03-10 2017-09-14 Eberspächer Exhaust Technology GmbH & Co. KG Mischer
CN111485980A (zh) * 2016-09-26 2020-08-04 天纳克（苏州）排放系统有限公司 混合组件
DE102016119306A1 (de) 2016-10-11 2018-04-12 Witzenmann Gmbh Vorrichtung zum Vermischen von Fluidströmen
DE102018108592A1 (de) 2018-04-11 2019-10-17 Eberspächer Exhaust Technology GmbH & Co. KG Gas/Gas-Mischer zum Einleiten von Gas in den Abgasstrom einer Brennkraftmaschine

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DE102013221428B4 (de) * 2013-10-22 2016-02-18 Eberspächer Exhaust Technology GmbH & Co. KG Katalysatoranordnung mit Injektionsabschnitt

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CN113137299B (zh) 2023-02-17
US20210222605A1 (en) 2021-07-22
US11384671B2 (en) 2022-07-12
EP3851646A1 (fr) 2021-07-21
DE102020101134A1 (de) 2021-07-22
CN113137299A (zh) 2021-07-20

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