EP3752721B1 - Dispositif de retraitement de gaz d'échappement permettant l'introduction dosée d'un agent de retraitement de gaz d'échappement - Google Patents

Dispositif de retraitement de gaz d'échappement permettant l'introduction dosée d'un agent de retraitement de gaz d'échappement Download PDF

Info

Publication number
EP3752721B1
EP3752721B1 EP19700042.5A EP19700042A EP3752721B1 EP 3752721 B1 EP3752721 B1 EP 3752721B1 EP 19700042 A EP19700042 A EP 19700042A EP 3752721 B1 EP3752721 B1 EP 3752721B1
Authority
EP
European Patent Office
Prior art keywords
exhaust
flow
gas aftertreatment
exhaust gas
funnel
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
EP19700042.5A
Other languages
German (de)
English (en)
Other versions
EP3752721A1 (fr
Inventor
Kamran Khani
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3752721A1 publication Critical patent/EP3752721A1/fr
Application granted granted Critical
Publication of EP3752721B1 publication Critical patent/EP3752721B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
    • B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
    • B01F23/2132—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids using nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • 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
    • F01N13/009—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 separate purifying devices arranged in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F2025/93—Arrangements, nature or configuration of flow guiding elements
    • B01F2025/931—Flow guiding elements surrounding feed openings, e.g. jet nozzles
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/06—Exhaust treating devices having provisions not otherwise provided for for improving exhaust evacuation or circulation, or reducing back-pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel

Definitions

  • the invention relates to an exhaust gas after-treatment device for metering a liquid exhaust gas after-treatment agent into an exhaust gas stream of an internal combustion engine, with a mixing chamber in which the exhaust gas after-treatment agent is mixed with the exhaust gas stream, the mixing chamber having a circular-cylindrical mixing tube which has a funnel-shaped circumference extending towards a free end has an enlarging end section, with a funnel element that opens conically at least in sections in the direction of the mixing tube, which funnel element has a plurality of flow openings in its jacket wall, and with an injection valve that is arranged on the end of the funnel element that faces away from the mixing tube, in order to inject the exhaust gas aftertreatment agent into the funnel element .
  • the invention relates to an exhaust gas aftertreatment system with the exhaust gas aftertreatment device mentioned above.
  • Exhaust gas aftertreatment devices of the type mentioned are known from the prior art.
  • exhaust gas aftertreatment devices that ensure pollutant reduction by using an additional exhaust gas aftertreatment agent.
  • SCR Selective Catalytic Reduction
  • An aqueous urea solution which is injected into the exhaust gas or the exhaust pipe by means of suitable metering systems, in particular injection valves, is suitable as an exhaust aftertreatment agent.
  • the reducing agent ammonia is obtained from the aqueous urea solution, which is fed to the exhaust gas during operation of the internal combustion engine, by means of thermolysis and hydrolysis.
  • an exhaust gas aftertreatment device of the type mentioned is known.
  • the exhaust gas is introduced radially into a mixing chamber so that a swirl is created even before the exhaust gas and exhaust gas aftertreatment agent are mixed with one another. This improves mixture preparation.
  • a funnel-shaped element ensures that the injected exhaust gas aftertreatment agent can initially expand over a predetermined length essentially undisturbed by the exhaust gas flow before it is mixed with the exhaust gas flow.
  • the exhaust gas can flow into the mixing tube independently of the exhaust gas aftertreatment agent.
  • EP 2 956 233 A1 DE 10 2010 032 576 A1 , DE 10 2014 211 260 A1 , EP 2 884 069 A1 , DE 11 2015 001 958 T5 or EP 2 171 229 B1 already known.
  • EP 3 067 529 A1 a generic exhaust gas aftertreatment device is already known.
  • the exhaust gas aftertreatment device with the features of claim 1 has the advantage that, despite a small installation volume, the exhaust gas and exhaust gas aftertreatment agent are optimally mixed, and crystalline by-products are avoided during operation.
  • this is achieved in that the funnel element lies at least substantially within the end section coaxially to the end section, and that at least some of the through-flow openings are each assigned a flow guide element that rises from the casing wall, in particular outwards, for generating a swirl flow in the mixing tube.
  • the funnel element lies essentially freely in the mixing chamber, but ends in a funnel-shaped, widened end section of the mixing tube, which also protrudes into the mixing chamber.
  • the fact that the funnel element lies at least essentially inside the end section ensures that the exhaust gas flowing into the mixing tube acts on the funnel element.
  • the exhaust gas flows at least partially through the through-flow openings through the casing wall of the funnel element in order to be mixed with the exhaust gas after-treatment agent inside the funnel element.
  • the flow guide elements assigned to the respective through-flow openings ensure that the exhaust gas flowing in or flowing through the jacket is directed into a swirling movement, which additionally improves the mixing of the exhaust gas aftertreatment agent with the exhaust gas. Because the swirl flow is achieved by the funnel element, the swirl flow takes place independently of how the exhaust gas is fed to the exhaust gas aftertreatment device.
  • the mixing chamber is therefore completely in the mixing tube. This makes it possible to design the exhaust gas aftertreatment device to be significantly more space-saving than was previously possible and at the same time to avoid the aforementioned disadvantages.
  • the through-flow openings are free of flow guide elements in a region close to the injector.
  • the through-flow openings in the area close to the injector represent simple openings that do not have a swirling effect on the exhaust gas and/or the exhaust gas aftertreatment agent. Rather, the simple through openings allow that
  • All flow openings are preferably each assigned a flow guide element.
  • the flow guide elements are thus present in order to prevent the swirl flow through the
  • Shell wall of the funnel element to generate flowing exhaust gas Shell wall of the funnel element to generate flowing exhaust gas.
  • the late generation of swirl also means that the exhaust gas aftertreatment agent spray can initially expand and atomize more or less undisturbed before it is mixed with the exhaust gas, as a result of which optimized mixing is achieved.
  • the fact that all through-flow openings remote from the injection valve are provided with flow guide elements ensures that swirl is generated with a high degree of efficiency.
  • the funnel element is arranged on a cup-shaped flow element, with the flow element lying in an exhaust gas supply channel into which the free end of the mixing tube opens.
  • the funnel element is thus held by a separate flow element, with the flow element being located in an exhaust gas supply duct and, in particular, being fastened to it.
  • the cup-shaped element directs the air flow from the feed channel in the direction of the mixing tube.
  • the cup-shaped configuration ensures that the injection valve is arranged particularly close to the tip of the funnel element in a simple manner.
  • the central axes of the cup-shaped flow element and the mixing tube are aligned with one another in order to achieve an advantageous flow effect.
  • the conical design of the cup-shaped flow element optimizes the routing of the exhaust gas from the exhaust gas feed channel into the mixing tube, in that turbulence in particular is avoided at the transition from the feed channel into the mixing tube.
  • the flow element defines an annular gap to the mixing tube or its orifice, through which the exhaust gas flowing into the mixing tube is compressed and/or accelerated, thereby further improving mixing with the exhaust gas aftertreatment agent.
  • the flow element protrudes in some areas into the end section of the mixing tube.
  • the formation of the annular gap and a defined guidance of the Exhaust flow guaranteed in the mixing tube.
  • the injection valve is preferably fastened or arranged on the flow element and/or on the funnel element in such a way that a central axis of the exhaust gas aftertreatment agent sprayed out conically and a swirl axis generated by the flow guide elements are at least essentially aligned with one another.
  • the exhaust gas aftertreatment agent is injected into the exhaust gas particularly close to the eye of the swirl flow, resulting in advantageous mixing.
  • the flow guide elements are designed or aligned in such a way that at least part of the injected exhaust gas aftertreatment agent impinges on an inner wall of the mixing tube.
  • the result of this is that the exhaust gas aftertreatment agent is distributed uniformly on the inside of the mixing tube wall and at least largely evaporates there during further operation of the internal combustion engine.
  • the swirl flow increases the thermal energy input into the wall, which is used to vaporize the exhaust aftertreatment agent.
  • the swirling flow prevents larger amounts of the exhaust aftertreatment agent from passing through the mixing tube without coming into contact with the inner wall.
  • the funnel element rests radially on the mixing tube. At its free end, at which the funnel element has its largest outer circumference, the funnel element thus bears radially against the inner wall of the mixing tube, which means that all of the exhaust gas has to flow through through-flow openings in the funnel element in order to get into the mixing tube.
  • the swirl flow is adjusted in a particularly reliable manner and the advantageous mixing is ensured.
  • an in particular annular bypass gap for the exhaust gas is present radially between the funnel element and the mixing tube.
  • a radial distance remains between the funnel element and the mixing tube or its inner wall. This leaves the distance also at the largest outer circumference of the funnel element.
  • the bypass channel can extend in the form of a ring or a ring segment over the circumference of the funnel element. This leaves the possibility that the funnel element is positioned radially in the mixing tube by means of one or more webs or spacers which are arranged on its outer circumference and bear against the inner wall of the mixing tube.
  • the funnel element opens in the shape of a funnel along its entire length.
  • the funnel element is thus configured in a funnel shape overall, so that it can be optimally adapted to the shape of the exhaust gas aftertreatment agent spray of the injection valve.
  • the funnel element is funnel-shaped only in one end area and cylindrical in an area in particular close to the injection valve, with the through-flow openings preferably being formed only in this area.
  • a flow guide element as described above, is preferably assigned to the or at least most of the through-flow openings in order to generate the hydraulic flow.
  • the funnel-shaped end area means that the exhaust gas aftertreatment agent spray can expand to the end of the funnel section and that advantageous mixing also occurs downstream of the funnel element in the mixing tube.
  • the exhaust gas supply channel extends transversely, in particular perpendicularly, to the central axis of the mixing tube. This results in a deflection of the exhaust gas into the mixing tube, which is, for example, 90°. This ensures a compact design, with the deflection having no adverse effect on the flow behavior due to the advantageous design of the exhaust gas aftertreatment device.
  • the exhaust gas feed channel causes an exhaust gas deflection of the exhaust gas into the mixing tube by 180° or less. As a result, particularly compact designs of the exhaust aftertreatment device can be achieved.
  • the flow guide elements preferably have a straight cross section and/or longitudinal section, or alternatively have a curvature in cross section and/or longitudinal section, through which the preferred swirl flow is achieved.
  • the exhaust gas aftertreatment system according to the invention with the features of claim 14 is characterized by the exhaust gas aftertreatment device according to the invention. This results in the advantages already mentioned.
  • FIG 1 shows an exhaust gas aftertreatment system 1 for an internal combustion engine of a motor vehicle in a simplified sectional view.
  • the exhaust aftertreatment system 1 has an exhaust pipe 2 which is connected to the internal combustion engine and has an exhaust gas inlet 3 .
  • a first catalytic converter 4 and a particle filter 5 are arranged downstream of the catalytic converter 4, which treat the exhaust gas flowing into the exhaust pipe 2 in a known manner.
  • the exhaust gas pipe 2 merges into an exhaust gas supply channel 6 for an exhaust gas aftertreatment device 7, which is described in more detail below.
  • FIG 2 shows an enlarged sectional view of the exhaust gas aftertreatment device 7 .
  • This has a mixing tube 8 opening into the exhaust gas supply channel 6 .
  • An end section 9 of the mixing tube facing the exhaust gas supply channel 6 widens conically in the direction of the exhaust gas supply channel 6 .
  • the end section 9 ends on a first side wall 10 of the exhaust gas supply duct 6.
  • a cup-shaped flow element 12 is fastened to a side wall 11 of the exhaust gas supply duct 6, which is arranged opposite the side wall 10 in the present case penetrates completely from the side wall 11 to the side wall 10 .
  • the flow element 12 protrudes into an orifice of the end section 9 in the side wall 10 .
  • the flow element 12 has an end section 13 which faces the mixing tube 8 and tapers in the direction of the mixing tube 8 .
  • the end section 13 extends, as seen in the longitudinal extension of the flow element 12, or in the axial extension, over more than half of the entire longitudinal extension of the flow element 12 a mixing tube 8 facing bottom portion 15, which is substantially extends parallel to the side walls 10 and 11 of the exhaust gas supply channel 6.
  • an opening 16 is formed centrally.
  • a funnel element 17 is assigned to this opening 16 .
  • the funnel element 17 is funnel-shaped overall in such a way that, starting from the flow element 12, it widens in the direction of the mixing tube 8, with a central axis of the funnel element 17 and the mixing tube 8 being aligned with one another, at least in the end section 9.
  • the funnel element 17 or its casing wall 19 protrudes from the flow element 12 through the entire conical end section 9 and into the mixing tube 8 .
  • the funnel element 17 is thus located overall in the end section 9. At its free end, its maximum outer circumference corresponds essentially or almost to the inner circumference of the mixing tube 8.
  • the funnel element 17 has a multiplicity of flow openings 18 which are distributed uniformly in a casing wall 19 of the funnel element 17 . For reasons of clarity, only some of the flow openings 18 are provided with a reference number in the present case.
  • each through-flow opening is assigned a flow-guiding element 20, which extends radially in sections over the respective through-flow opening, so that the flow-guiding elements 20 specify a flow direction for exhaust gas flowing through the flow opening 18, which is in the circumferential direction or at least essentially in the circumferential direction of the funnel element 17 , so that a swirling flow through the funnel element 17 for the exhaust gas, which flows axially into the mixing tube 8, is generated.
  • the funnel element 17 extends almost to the inner wall of the mixing tube 8 , the exhaust gas is forced to pass through the flow openings 18 or the funnel element 17 .
  • the flow guide elements 20 ensure that the exhaust gas entering the mixing tube 8 is guided through the mixing tube 8 in a swirling flow.
  • the flow guide elements 20 are all aligned in the same direction.
  • an injection valve 21 is arranged in the flow element 12, which is connected by a delivery device, not shown here, to a tank that provides liquid exhaust gas aftertreatment agent.
  • the liquid exhaust gas after-treatment agent is mixed with the exhaust gas flow which penetrates into the mixing tube 8.
  • the mixing tube 8 thus represents a mixing chamber 22.
  • the injection valve 21 is arranged centrally on the flow element 12 in such a way that a central axis of a spray cone of the injection valve 21 is aligned with the central axis of the funnel element 17 (dash-dot line in figure 2 ).
  • the funnel element 17 is preferably designed in such a way that the funnel opening axially facing the mixing tube is larger than the spray cone of the injection valve 21, so that wetting of the funnel element 17 with the exhaust gas aftertreatment agent is prevented.
  • the exhaust gas flows through the exhaust gas feed duct 6 in the direction of the exhaust gas aftertreatment device 7 and is conducted through the advantageous flow part 12 into the end section 9 of the mixing tube 8 . Because the flow part 12 partially projects into the mixing tube 8, an annular gap is formed through which the exhaust gas flow flows, as a result of which it is compressed and accelerated. When passing through the throughflow openings 18 of the funnel element 17, the exhaust gas flow is forced into a swirling movement and mixed with the injected exhaust gas aftertreatment agent.
  • the flow part 12 can be designed symmetrically or asymmetrically in order to ensure an optimal flow of exhaust gas.
  • the external inner area of the flow part 12 is preferably designed in such a way that the injection valve 21, including the necessary insulation elements, is accommodated in the depression.
  • the flow part 12 is formed from sheet metal.
  • the exhaust gas is supplied to the funnel element 17 particularly evenly.
  • a flow-evening geometry fitted upstream of the funnel element 17 can be supplemented in order to ensure that the exhaust gas is supplied to the funnel element 17 as homogeneously as possible.
  • the funnel element 17 is expediently fastened to the flow part 12 and optionally supported laterally or radially on the mixing tube 8 .
  • radial spacer elements or spacers can be present at the end of the funnel element 17 , which bear against the inside of the mixing tube 8 .
  • the advantageous swirl flow ensures that the introduced exhaust gas after-treatment agent is distributed evenly over the inner wall of the mixing tube 8 and from there it is largely evaporated.
  • the swirling flow increases the thermal energy input into the mixing tube 8, which can be further used for evaporating the exhaust gas aftertreatment agent.
  • it can also be designed in such a way that part of the exhaust gas is guided past the transition or radially between the funnel element 17 and the mixing tube 8 through an annular gap as a bypass channel 23 .
  • Such a bypass channel 23 is formed radially between the free end of the funnel element 17 and the mixing tube 8 . As a result, for example, a dynamic pressure acting on the exhaust system is reduced.
  • exhaust gas is deflected by the exhaust system 1 by 180°
  • other exhaust gas feeds can also be conceivable which, for example, have a deflection of only 90° or less.
  • FIGs 3A and 3B show the funnel element 17 according to the first example of FIG figure 2 in a side view ( Figure 3A ) and in a plan view ( Figure 3B ). It can be seen here that the flow guide elements 20 have an arched contour in order to generate an optimal swirl flow. The openings of the flow guide elements 20 are always aligned in the same direction in order to ensure a clear swirl flow.
  • FIGS 4A and 4B show an embodiment of the funnel element 17, in a side view and in a plan view, the funnel element 17 according to this embodiment differing from the preceding one Example differs in that in an end region close to the injector, that is to say at the end with the smaller diameter, a plurality of through-flow openings 18 are formed without flow-guiding elements.
  • a plurality of through-flow openings 18 are formed without flow-guiding elements.
  • FIGS 5A and 5B show another embodiment of the funnel element 17, which differs from the embodiment of FIG Figures 4A and 4B differs in that the flow guide elements 20 are not formed in the shape of an archway, but each have a straight contour in cross section and longitudinal section, that is to say are formed in the shape of a plate. This enables the funnel element 17 to be realized in a particularly cost-effective manner. Also in the embodiment of Figure 3A and 3B the flow guide elements 20 can be plate-shaped.
  • the flow guiding elements 20 are preferably designed as outwardly bent air guiding tongues of the jacket wall 19 .
  • the through-flow openings 18 with the flow-guiding elements 20 are arranged/designed in the circular-cylindrical section. In this way, too, an advantageous mixing of exhaust gas and exhaust gas after-treatment agent and the avoidance of crystal formation is achieved.

Landscapes

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

Claims (14)

  1. Dispositif de retraitement de gaz d'échappement (7) permettant l'introduction dosée d'un agent liquide de retraitement de gaz d'échappement dans un flux de gaz d'échappement d'un moteur à combustion interne, comportant une chambre de mélange (22) dans laquelle l'agent de retraitement de gaz d'échappement est mélangé au flux de gaz d'échappement, la chambre de mélange (22) présentant un tube de mélange (8) de forme cylindrique circulaire qui présente une partie d'extrémité (9) en forme d'entonnoir agrandissant la circonférence en direction d'une extrémité libre, comportant un élément entonnoir (17) s'ouvrant en forme de cône au moins dans certaines parties en direction du tube de mélange (8), lequel élément entonnoir présente plusieurs ouvertures d'écoulement (18) dans sa paroi d'enveloppe (19), et une soupape d'injection (21) pour l'agent de retraitement de gaz d'échappement étant disposée à l'extrémité de l'élément entonnoir (17) opposée au tube de mélange (8), afin d'injecter l'agent de retraitement de gaz d'échappement dans l'élément entonnoir (17), l'élément entonnoir (17) se situant au moins sensiblement à l'intérieur de la partie d'extrémité (9) de manière coaxiale à la partie d'extrémité, et en ce qu'un élément de guidage d'écoulement (20) s'élevant à partir de la paroi d'enveloppe (19) et servant à produire un écoulement turbulent dans le tube de mélange (8) est respectivement associé à au moins certaine des ouvertures d'écoulement (18), caractérisé en ce que les ouvertures d'écoulement (18) sont dépourvues d'élément de guidage d'écoulement dans une région proche de la soupape d'injection.
  2. Dispositif de retraitement de gaz d'échappement selon la revendication 1, caractérisé en ce qu'un élément de guidage d'écoulement (20) est associé respectivement à toutes les ouvertures d'écoulement (18) sauf les ouvertures d'écoulement (18) dans la région proche de la soupape d'injection ou à toutes les ouvertures d'écoulement (18).
  3. Dispositif de retraitement de gaz d'échappement selon l'une des revendications précédentes, caractérisé en ce que l'élément entonnoir (17) est disposé sur un élément d'écoulement (12) en forme de coupe, lequel élément d'écoulement se situe dans un canal d'amenée de gaz d'échappement (6) dans lequel débouche l'extrémité libre du tube de mélange (8).
  4. Dispositif de retraitement de gaz d'échappement selon la revendication 3, caractérisé en ce que l'élément d'écoulement (12) présente une paroi conique (14) se rétrécissant en direction du tube de mélange (8) et réalisée de manière fermée.
  5. Dispositif de retraitement de gaz d'échappement selon l'une des revendications 3 et 4, caractérisé en ce que l'élément d'écoulement (12) pénètre dans certaines régions dans la partie d'extrémité (9) du tube de mélange (8) .
  6. Dispositif de retraitement de gaz d'échappement selon l'une des revendications 3 à 5, caractérisé en ce que la soupape d'injection (21) est fixée et/ou disposée sur l'élément d'écoulement (12) et/ou sur l'élément entonnoir (17) de telle sorte qu'un axe médian de l'agent de retraitement de gaz d'échappement projeté en forme de cône et un axe de turbulence produit par les éléments de guidage d'écoulement (20) soient alignés au moins sensiblement l'un avec l'autre.
  7. Dispositif de retraitement de gaz d'échappement selon l'une des revendications précédentes, caractérisé en ce que les éléments de guidage d'écoulement (20) sont réalisés ou orientés de telle sorte qu'au moins une partie de l'agent de retraitement de gaz d'échappement injecté frappe une paroi intérieure du tube de mélange (8) .
  8. Dispositif de retraitement de gaz d'échappement selon l'une des revendications précédentes, caractérisé en ce que l'élément entonnoir (17) s'appuie radialement contre le tube de mélange (8).
  9. Dispositif de retraitement de gaz d'échappement selon l'une des revendications précédentes, caractérisé en ce qu'un canal de dérivation (23) en particulier annulaire pour le gaz d'échappement est présent radialement entre l'élément entonnoir (17) et le tube de mélange (8).
  10. Dispositif de retraitement de gaz d'échappement selon l'une des revendications précédentes, caractérisé en ce que l'élément entonnoir (17) s'ouvre en forme d'entonnoir le long de toute son étendue longitudinale.
  11. Dispositif de retraitement de gaz d'échappement selon l'une des revendications 1 à 9, caractérisé en ce que l'élément entonnoir (17) s'ouvre en forme d'entonnoir seulement dans une région d'extrémité, et en ce que les ouvertures d'écoulement (18) ne sont réalisées que dans une région cylindrique de l'élément entonnoir (17).
  12. Dispositif de retraitement de gaz d'échappement selon l'une des revendications précédentes, caractérisé en ce que le canal d'amenée de gaz d'échappement (6) s'étend transversalement, en particulier perpendiculairement à l'axe médian du tube de mélange (8) .
  13. Dispositif de retraitement de gaz d'échappement selon l'une des revendications précédentes, caractérisé en ce que le canal d'amenée de gaz d'échappement (6) provoque une déviation de gaz d'échappement de 180° ou moins dans le tube de mélange (8).
  14. Système de retraitement de gaz d'échappement (1) permettant de réduire les émissions de substances nocives dans le gaz d'échappement d'un moteur à combustion interne d'un véhicule automobile, comportant un dispositif de retraitement de gaz d'échappement (7) selon l'une des revendications 1 à 13.
EP19700042.5A 2018-02-15 2019-01-03 Dispositif de retraitement de gaz d'échappement permettant l'introduction dosée d'un agent de retraitement de gaz d'échappement Active EP3752721B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018202298.4A DE102018202298A1 (de) 2018-02-15 2018-02-15 Abgasnachbehandlungseinrichtung zum Eindosieren eines flüssigen Abgasnachbehandlungsmittels
PCT/EP2019/050067 WO2019158269A1 (fr) 2018-02-15 2019-01-03 Dispositif de retraitement de gaz d'échappement permettant l'introduction dosée d'un agent de retraitement de gaz d'échappement

Publications (2)

Publication Number Publication Date
EP3752721A1 EP3752721A1 (fr) 2020-12-23
EP3752721B1 true EP3752721B1 (fr) 2022-03-30

Family

ID=64959361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19700042.5A Active EP3752721B1 (fr) 2018-02-15 2019-01-03 Dispositif de retraitement de gaz d'échappement permettant l'introduction dosée d'un agent de retraitement de gaz d'échappement

Country Status (4)

Country Link
EP (1) EP3752721B1 (fr)
CN (1) CN111742123B (fr)
DE (1) DE102018202298A1 (fr)
WO (1) WO2019158269A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20215978A1 (en) * 2021-09-16 2023-03-17 Proventia Oy Method in a flow device for exhaust gas aftertreatment and flow device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009053950A1 (de) * 2009-11-19 2011-05-26 Man Nutzfahrzeuge Aktiengesellschaft Vorrichtung zur Nachbehandlung von Abgasen von Brennkraftmaschinen
DE102012010878A1 (de) * 2012-06-01 2013-12-05 Daimler Ag Reduktionsmittelzugabe- und Aufbereitungssystem eines Kraftfahrzeugs
DE112015001958T5 (de) * 2014-04-24 2017-01-26 Tenneco Automotive Operating Company Inc. Perforiertes Mischrohr mit Drallkörper
DE102014208743A1 (de) * 2014-05-09 2015-11-12 Robert Bosch Gmbh Einrichtung, Abgasnachbehandlungseinrichtung
DE102014009731A1 (de) 2014-06-28 2015-12-31 Daimler Ag Reduktionsmittelaufbereitungssystem
GB2533790B (en) * 2014-12-30 2019-01-23 Proventia Oy Method, apparatus and device for improved aftertreatment of exhaust gas
US9784163B2 (en) * 2015-01-22 2017-10-10 Tenneco Automotive Operating Company Inc. Exhaust aftertreatment system having mixer assembly
DE102015002974A1 (de) * 2015-03-10 2016-09-15 Man Truck & Bus Ag Vorrichtung zur Nachbehandlung von Abgas eines Kraftfahrzeugs

Also Published As

Publication number Publication date
EP3752721A1 (fr) 2020-12-23
DE102018202298A1 (de) 2019-08-22
WO2019158269A1 (fr) 2019-08-22
CN111742123B (zh) 2022-06-14
CN111742123A (zh) 2020-10-02

Similar Documents

Publication Publication Date Title
EP3478947B1 (fr) Dispositif mélangeur pour un système de post-traitement des gaz d'échappement d'un véhicule à moteur, système de post-traitement des gaz d'échappement et véhicule à moteur
EP3018311B1 (fr) Section d'injection pour un dispositif de post-traitement de gaz d'échappement
EP2700442B1 (fr) Installation de gaz d'échappement avec dispositif de mélange et/ou d'évaporation
EP2865861B1 (fr) Système de catalyseur avec section d'injection
EP2659101B1 (fr) Dispositif pour injecter des fluides dans des systèmes d'échappement
EP2687697B1 (fr) Dispositif de mélange pour le post-traitement de gaz d'échappement
EP2325452B1 (fr) Dispositif de traitement de gaz d'échappement de moteurs à combustion interne
EP2006017B1 (fr) Dispositif de mélange et/ou d'évaporation et procédé de fabrication correspondant
DE102009036511B4 (de) Abgasanlage
EP2687286B1 (fr) Dispositif de mélange pour le post-traitement de gaz d'échappement
DE102008053168B4 (de) Einrichtung zum Einbringen einer Flüssigkeit in eine Gasströmung
DE102010021438B4 (de) Abgasnachbehandlungsvorrichtung
WO2015074926A1 (fr) Dispositif de post-traitement de gaz d'échappement
EP2090761A1 (fr) Système de traitement des gaz d'échappement pour un moteur à combustion interne
EP3068523B1 (fr) Dispositif de mélange d'un milieu liquide avec un courant gazeux
WO2012120000A1 (fr) Système d'échappement d'un moteur à combustion interne
DE102016004333A1 (de) Abgasnachbehandlungsvorrichtung mit Katalysator und Mischvorrichtung
DE102013211662A1 (de) Mischereinrichtung
WO2016062395A1 (fr) Système de post-traitement des gaz d'échappement destiné à un moteur à combustion interne, en particulier d'un véhicule à moteur
EP3752721B1 (fr) Dispositif de retraitement de gaz d'échappement permettant l'introduction dosée d'un agent de retraitement de gaz d'échappement
DE102012014528A1 (de) Mehrstufiger Plattenmischer
WO2020216520A1 (fr) Dispositif mélangeur pour un système de post-traitement des gaz d'échappement d'un véhicule automobile, système de post-traitement des gaz d'échappement et véhicule automobile
DE102015209165B4 (de) Abgasbehandlungseinrichtung für eine Brennkraftmaschine
CH711045A1 (de) Vorrichtung zur Abgasnachbehandlung einer Brennkraftmaschine.

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200915

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20211104

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1479388

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220415

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502019003864

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220630

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220630

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20220330

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220701

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220801

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220730

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502019003864

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20230103

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230123

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220330

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20230103

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230103

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20230131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230131

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230103

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230103

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240322

Year of fee payment: 6