WO2023242031A1 - Brûleur pour véhicule automobile et véhicule automobile comportant au moins un tel brûleur - Google Patents

Brûleur pour véhicule automobile et véhicule automobile comportant au moins un tel brûleur Download PDF

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Publication number
WO2023242031A1
WO2023242031A1 PCT/EP2023/065266 EP2023065266W WO2023242031A1 WO 2023242031 A1 WO2023242031 A1 WO 2023242031A1 EP 2023065266 W EP2023065266 W EP 2023065266W WO 2023242031 A1 WO2023242031 A1 WO 2023242031A1
Authority
WO
WIPO (PCT)
Prior art keywords
swirl
air
swirl chamber
flow
burner
Prior art date
Application number
PCT/EP2023/065266
Other languages
German (de)
English (en)
Inventor
Herbert Zoeller
Original Assignee
Mercedes-Benz Group AG
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 Mercedes-Benz Group AG filed Critical Mercedes-Benz Group AG
Publication of WO2023242031A1 publication Critical patent/WO2023242031A1/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
    • F01N3/02—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
    • F01N3/025—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 using fuel burner or by adding fuel to 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 ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
    • 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
    • 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
    • F01N3/36—Arrangements for supply of additional fuel
    • 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
    • F01N2240/14—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 fuel burner
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/10—Surface coverings for preventing carbon deposits, e.g. chromium
    • 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
    • F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. 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
    • 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 invention relates to a burner for an exhaust tract through which exhaust gas from an internal combustion engine of a motor vehicle can flow.
  • the invention further relates to a motor vehicle with at least one such burner.
  • exhaust tracts Motor vehicles with internal combustion engines and exhaust systems, which are also referred to as exhaust tracts, are known from the general state of the art and in particular from series vehicle construction. Exhaust gas from the respective internal combustion engine, also known as an internal combustion engine, can flow through the respective exhaust gas tract. In some operating states or operating situations of the respective internal combustion engine, a high temperature of the exhaust gas may be desirable in order, for example, to be able to quickly heat up and/or keep warm an exhaust gas aftertreatment device arranged in the exhaust tract, although in these operating states or operating situations the actual temperature of the exhaust gas is only insufficiently high.
  • DE 3729 861 C2 discloses a method for operating a soot filter device for a diesel engine. Furthermore, the reveals
  • DE 11 2012 001 594 T5 an object with an engine or engine component and a coating which is applied to the engine or engine component. Furthermore, from DE 11 2012 001 599 T5 a method for applying a coating to an engine, an exhaust system or an engine component is known.
  • the atomizer nozzle has an inner swirl chamber through which a first part of the air can flow, by means of which a swirl-shaped flow of the first part of the air can be brought about, and a first outflow opening through which the first part of the air flowing through the inner swirl chamber can flow, through which the first Part of the air the inner swirl chamber can be removed.
  • the atomizer nozzle has, in a length region of the inner swirl chamber in the circumferential direction of the inner swirl chamber, an outer swirl chamber through which a second part of the air can flow, by means of which a swirl-shaped flow of the second part of the air can be brought about.
  • the atomizer nozzle has a second outflow opening through which the second part of the air flowing through the outer swirl chamber and the first part of the air flowing through the inner swirl chamber and the first outflow opening can flow through.
  • AT 406 706 B discloses a burner with a combustion chamber in which a mixture comprising air and fuel is to be ignited and thereby burned.
  • the burner has an inner swirl chamber through which a first part of the air can flow, by means of which a swirl-shaped flow of the first part of the air can be brought about, and a first outflow opening through which the first part of the air flowing through the inner swirl chamber can flow, through which the first Part of the air can be removed from the inner swirl chamber.
  • the burner has an introduction element through which a fuel can flow, by means of which the fuel can be introduced into the inner swirl chamber and whose first outflow opening can also be flowed through by the fuel discharged from the introduction element.
  • the burner has, in a length region of the inner swirl chamber in the circumferential direction of the inner swirl chamber, an outer swirl chamber through which a second part of the air can flow, by means of which a swirl-shaped flow of the second part of the air can be brought about.
  • the burner has a second outflow opening through which the second part of the air flowing through the outer swirl chamber, the fuel flowing through the first outflow opening and the first part of the air flowing through the inner swirl chamber and the first outflow opening can flow through. The parts of the air and the fuel can be introduced into the combustion chamber via the second outflow opening.
  • DE 100 55613 A1 shows a device for carrying out a method for supplying thermal energy and/or fuel into a gas stream, in one embodiment as a two-pipe burner.
  • the heat of the exhaust gas can be conducted from the area of an outer chamber to the area of an inner chamber via components that enlarge a surface area of an outer wall of an inner pipe element.
  • a catalytic coating can be applied in the area of the components,
  • DE 44 17 769 A1 shows a premix burner, the premix burner has the shape of a straight channel. At the head of this channel there are several injectors Fuel injected. An ignition zone is located downstream of a first part of the mixing tube forming the premix burner as a continuation of the channel. An interior-facing surface of a wall in the area of the ignition zone can be supplemented with a catalytic coating.
  • the object of the present invention is to create a burner for an exhaust tract of a motor vehicle and a motor vehicle with at least one such burner, so that a particularly advantageous operation of the burner can be realized.
  • a first aspect of the invention relates to a burner for an exhaust gas tract through which exhaust gas from an internal combustion engine of a motor vehicle, also referred to as an internal combustion engine or internal combustion engine, can flow.
  • the motor vehicle which can preferably be designed as a motor vehicle and most preferably as a passenger car, has the internal combustion engine and the exhaust tract in its fully manufactured state and can be driven by the internal combustion engine.
  • combustion processes take place in the internal combustion engine, in particular in at least one or more combustion chambers of the internal combustion engine, resulting in the exhaust gas from the internal combustion engine.
  • the exhaust gas can flow out of the respective combustion chamber and flow into the exhaust tract and subsequently flow through the exhaust tract, which is also referred to as the exhaust system.
  • At least one component such as an exhaust gas aftertreatment element for aftertreating the exhaust gas
  • the exhaust gas aftertreatment element is, for example, a catalyst, in particular an SCR catalyst, wherein, for example, a selective catalytic reduction (SCR) can be catalytically supported and/or brought about by means of the SCR catalyst, so that, for example, the SCR catalyst is catalytic for the SCR is active.
  • SCR selective catalytic reduction
  • any nitrogen oxides contained in the exhaust gas are at least partially removed from the exhaust gas by the nitrogen oxides reacting with ammonia to form nitrogen and water during the selective catalytic reduction.
  • the ammonia is provided, for example, by a particularly liquid reducing agent.
  • the exhaust gas aftertreatment element can be a Be a particle filter, in particular a diesel particle filter, or include a particle filter, in particular a diesel particle filter, wherein particles contained in the exhaust gas, in particular soot particles, can be filtered out of the exhaust gas by means of the particle filter.
  • the burner has a combustion chamber, also known as the main combustion chamber, in which a mixture comprising air and a preferably liquid fuel can be ignited and thereby burned.
  • a burner exhaust gas from the burner is generated, in particular in the combustion chamber.
  • the burner exhaust gas can, for example, flow out of the combustion chamber and flow into the exhaust tract, that is, for example, into an exhaust duct of the exhaust tract through which the exhaust gas of the internal combustion engine can flow, in particular at an introduction point which, for example, is upstream in the flow direction of the exhaust gas of the internal combustion engine flowing through the exhaust tract or the exhaust duct aforementioned component is arranged.
  • the burner exhaust gas mixes with the exhaust gas from the internal combustion engine.
  • the burner exhaust gas in particular the burner exhaust gas mixed with the exhaust gas of the internal combustion engine
  • the component can be heated up, that is, heated .
  • the burner exhaust gas can flow out of the burner chamber and flow into the exhaust tract or into the aforementioned exhaust duct and thereby be mixed with the exhaust gas of the internal combustion engine flowing through the exhaust tract, also referred to as engine exhaust gas, and/or with a gas flowing through the exhaust tract , whereby the exhaust gas of the internal combustion engine or the gas is heated.
  • the gas can be, for example, air or combustion air, which flows through, for example, the exhaust tract or the exhaust duct, in particular while the internal combustion engine is not being operated, so that the internal combustion engine does not provide any exhaust gas, in which case, for example, the gas, in particular the combustion air, from the internal combustion engine is conveyed through the exhaust tract.
  • the component Due to the high exhaust gas temperature, the component can be heated because the exhaust gas is mixed with the burner exhaust gas or the gas flows through the component with the burner exhaust gas.
  • the burner exhaust gas is introduced from the combustion chamber at the aforementioned introduction point into the exhaust tract or into the exhaust duct and thus into the exhaust gas or gas flowing through the exhaust tract.
  • an ignition device in particular an electrically operable one, is provided, wherein the burner can include the ignition device.
  • the ignition device is at least partially arranged in the combustion chamber.
  • at least one ignition spark for igniting the mixture can be provided, that is, generated, in particular in the combustion chamber and/or using electrical energy, so that the mixture can be ignited in the combustion chamber, in particular by means of the ignition spark.
  • the ignition device is, for example, a glow plug or a spark plug.
  • the burner has an inner swirl chamber through which a first part of the air forming the mixture in the combustion chamber can flow and which causes a swirl-shaped flow of the first part of the air, which is therefore preferably upstream of the combustion chamber in the flow direction of the first part of the air flowing through the inner swirl chamber is arranged.
  • air refers to the air forming the mixture in the combustion chamber, that is to say the air from which the mixture is formed, in particular together with the fuel.
  • the air is, for example, ambient air.
  • the inner swirl chamber has, in particular, a first outflow opening through which the first part of the air flowing through the inner swirl chamber can flow, via which the first part of the air flowing through the first outflow opening can be removed from the inner swirl chamber and, for example, introduced into the combustion chamber.
  • the combustion chamber is arranged downstream of the inner swirl chamber in the flow direction of the first part of the air flowing through the inner swirl chamber.
  • the first part of the air flows through in a swirl-shaped manner, and/or the first part of the air only has its swirl-shaped flow at least in a first flow region arranged downstream of the inner swirl chamber and outside the inner swirl chamber, which is arranged, for example, in the combustion chamber.
  • the first part of the air flows out of the inner swirl chamber in a swirl shape via the first outflow opening and/or flows into the combustion chamber in a swirling manner, so that it is very preferably provided that the first part of the air has its swirling flow at least in the combustion chamber.
  • the first part of the air already has its swirl-shaped flow in the inner swirl chamber, at least in the aforementioned, at least a first portion of the inner swirl chamber.
  • the burner also has an introduction element, in particular an injection element, which has at least or exactly one outlet opening through which the preferably liquid fuel can flow.
  • the introduction element has several, in particular more than two, outlet openings through which the preferably liquid fuel can flow.
  • the introduction element has at least or exactly three outlet openings through which the fuel can flow.
  • the burner comprises an outer swirl chamber, which surrounds at least a length region of the inner swirl chamber and preferably also the first outflow opening in the circumferential direction of the inner swirl chamber, in particular completely circumferentially.
  • the circumferential direction of the inner swirl chamber runs, for example, in the aforementioned first flow direction, which runs, for example, in the axial direction of the inner swirl chamber and thus of the first outflow opening, and therefore coincides with the axial direction of the inner swirl chamber and thus of the outflow opening.
  • the inner swirl chamber is in the flow direction of the first part flowing through the first outflow opening and thus in the flow direction of the fuel flowing through the first outflow opening, therefore in the axial direction of the inner swirl chamber and thus the first outflow opening at the first outflow opening or at its end ends.
  • the outer swirl chamber whose axial direction coincides with the axial direction of the inner swirl chamber, can be flowed through by a second part of the air and is designed to cause a swirl-shaped flow of the second part of the air.
  • the second part of the air flows in a swirling manner in the outer swirl chamber, and therefore flows through at least a second portion of the outer swirl chamber in a swirling manner, and/or the second part of the air points in a second part flowing through the outer swirl chamber in the flow direction of the outer swirl chamber
  • the second flow region of the air arranged downstream of the outer swirl chamber which, for example, coincides with the aforementioned first flow region, has its swirl-shaped flow, wherein the second flow region can be arranged, for example, outside the outer swirl chamber and, for example, inside the combustion chamber.
  • the aforementioned first flow region is arranged outside the outer swirl chamber.
  • the second part of the air flows out of the outer swirl chamber in a swirl shape and/or flows into the combustion chamber in a swirl shape, so that it is preferably provided that the second part of the air has its swirl shape at least in the combustion chamber .
  • the outer swirl chamber has, in particular precisely, a second part of the air flowing through the outer swirl chamber, of the fuel flowing through the first outflow opening and of the first part of the air flowing through the inner swirl chamber and the first outflow opening and, for example, in the flow direction of the parts of the air and the fuel, arranged downstream of the first outflow opening, through which the second part of the air can be removed from the outer swirl chamber and the parts of the air and the fuel can be introduced into the combustion chamber.
  • the feature that the outer swirl chamber causes or can cause a swirl-shaped flow of the second part of the air flowing through the outer swirl chamber is to be understood in particular as meaning that the second part of the air flows through the outer swirl chamber in a swirl-shaped manner, i.e. at least a second partial area flows through the outer swirl chamber in a swirl shape, and / or the second part of the air only has its swirl-shaped flow at least in a second flow region arranged downstream of the outer swirl chamber and outside the outer swirl chamber, which is arranged, for example, in the combustion chamber.
  • the second part of the air flows out of the outer swirl chamber in a swirl shape via the second outflow opening and/or flows in a swirl shape into the combustion chamber, so that it is very preferably provided that the second part of the air flows in a swirl shape at least in the combustion chamber having.
  • the second part of the air has its swirl shape Flow already has in the outer three-chamber, at least in the aforementioned, at least a second portion of the outer swirl chamber,
  • the combustion chamber is arranged downstream of the inner swirl chamber and/or downstream of the outer swirl chamber in the flow direction of the respective part of the air flowing through the respective swirl chamber.
  • the parts of the air and the fuel can flow along a second flow direction through the second outflow opening and thus flow into the combustion chamber via the second outflow opening, for example the second flow direction running parallel to the first flow direction or coinciding with the first flow direction.
  • the second flow direction runs in the axial direction of the outer swirl chamber, and therefore coincides with the axial direction of the outer swirl chamber, so that it is very preferably provided that the axial direction of the inner swirl chamber corresponds to the axial direction of the outer swirl chamber vice versa.
  • the axial direction of the inner swirl chamber coincides with the axial direction of the outer swirl chamber or vice versa.
  • the respective axial direction of the respective swirl chamber runs perpendicular to the respective radial direction of the respective swirl chamber, the radial direction of the inner swirl chamber preferably coinciding with the radial direction of the outer swirl chamber or vice versa.
  • the first outflow opening is, for example, in the outer swirl chamber arranged.
  • the outer swirl chamber in particular in the flow direction of the second part of the air flowing through the second outflow opening, ends at the second outflow opening, in particular at its end.
  • the respective swirl chamber can have at least one or more swirl generators, by means of which the respective swirl-shaped flow can be generated or is generated.
  • the respective swirl generator is arranged in the respective swirl chamber.
  • the respective swirl generator can be, for example, a guide vane, by means of which, for example, the respective part, i.e. the respective air forming the respective part, is deflected at least or exactly once, in particular around at least or exactly 70°, in particular by at least substantially 90°, that is, for example, by 70° to 90°.
  • the respective swirl-shaped flow is to be understood as meaning a flow which extends in a swirl-shaped manner, that is to say at least essentially in a helical or helical shape, around the respective axial direction of the respective swirl chamber or the respective outflow opening.
  • the respective axial direction of the respective outflow opening runs perpendicular to a plane in which the respective outflow opening runs.
  • the respective axial direction of the respective outflow opening coincides with the respective axial direction of the respective swirl chamber.
  • the respective outflow opening is also referred to, for example, as the respective nozzle, whose cross section through which the respective part of the air can flow does not necessarily have to taper along the respective flow direction, but can taper.
  • the second outflow opening is also referred to as an outer nozzle or second nozzle, with the first outflow opening, for example, also being referred to as an inner nozzle or first nozzle.
  • the air can be particularly advantageously mixed with the preferably liquid fuel, in particular over a small mixing path, in particular in the combustion chamber, so that a particularly advantageous mixture preparation is realized, that is to say the mixture can be formed particularly advantageously.
  • the fuel can initially be mixed particularly well with the first part of the air, in particular in the inner swirl chamber, in particular due to the swirl-shaped flow of the first part of the air, in particular in the inner swirl chamber.
  • the fuel and, for example, the first part of the air already mixed with the fuel can be particularly advantageously mixed with the second part of the air, in particular in the outer swirl chamber and/or in the combustion chamber, since the second part of the air also has an advantageous, has a swirl-shaped flow.
  • the parts of the air and the fuel can be mixed particularly advantageously, so that an advantageous mixture preparation can be achieved.
  • the swirl-shaped flow of the first part of the air and the swirl-shaped flow of the second part of the air have the same direction of the respective swirl, in particular the two flows coincide.
  • the inner swirl chamber has a first, inner swirl generating device, by means of which the first, swirl-shaped flow of the first part of the air can be brought about.
  • the inner swirl generating device has the aforementioned, at least one swirl generator of the inner swirl chamber.
  • the outer swirl chamber has an external, second swirl generating device, by means of which the second, swirl-shaped flow of the second part of the air can be brought about.
  • the outer swirl generating device has the aforementioned, at least one swirl generator in the outer swirl chamber.
  • the swirl generating devices form a swirl generating device or the swirl generating devices are components of a swirl generating device of the burner.
  • the two swirl generating devices are formed in one piece with one another, that is to say are formed by a one-piece component, so that the two swirl generating devices are formed, for example, from a single piece, that is to say by a single piece.
  • the swirl generating devices are not designed as components that are designed separately from one another and are connected to one another.
  • the swirl generating devices are designed separately from one another and, in particular, are components that are connected to one another.
  • the first swirl generating device has at least one or more first swirl generating elements, such as preferably first guide vanes, wherein by means of the first swirl generating element or by means of the first swirl generating elements, the air or the first part of the air can advantageously be guided or deflected or redirected in such a way that the swirl-shaped flow of the first part of the air can be effected, that is, is effected.
  • the first swirl generating element is the aforementioned swirl generator of the inner swirl chamber.
  • the second swirl generating device comprises at least one or more second swirl generating elements, such as preferably second guide vanes, wherein the air or the second part of the air can be guided or deflected or deflected in this way by means of the second swirl generating element or by means of the second swirl generating elements that the second swirl-shaped flow of the second part of the air can be brought about, that is, is effected.
  • the second swirl generating element is the aforementioned swirl generator of the outer swirl chamber.
  • the swirl generating elements of the respective swirl generating device are arranged successively and/or spaced apart from one another in the circumferential direction of the respective swirl chamber, in particular around the respective axial direction of the respective swirl chamber.
  • the at least one first portion of the inner swirl chamber is in the flow direction of the first one flowing through the inner swirl chamber Part of the air is arranged downstream of the first swirl generating device.
  • the at least one second portion of the outer swirl chamber is arranged downstream of the second swirl generating device in the flow direction of the second part of the air flowing through the outer swirl chamber.
  • the respective swirl generating elements of the respective swirl chamber form, that is, in particular directly, delimit respective swirl channels through which the respective part of the air can flow, so that the respective swirl-shaped flow can be brought about or is brought about by means of the swirl channels.
  • the swirl channels prefferably be arranged successively and in particular at a distance from one another in the circumferential direction of the respective swirl chamber.
  • a surface of the burner which is designed, for example, as an inner peripheral surface, in particular concave or convex, is formed by a coating with which a coating-bearing surface is formed and in particular a base body formed separately from the coating is provided, wherein the surface and thus the coating directly delimit the inner swirl chamber and / or the outer swirl chamber at least partially, in particular at least predominantly and thus at least more than half or completely.
  • the coating and the base body are formed from materials that are different from one another, in particular in such a way that the coating is formed from a first material and the base body is formed from a second material that is different from the first material.
  • the feature that the surface and thus the coating at least partially directly delimit the inner swirl chamber and / or the outer swirl chamber is to be understood with regard to the respective swirl chamber that the respective air flowing through the respective swirl chamber flows directly onto the surface, i.e touched directly.
  • the coating can, for example, be set or selected in such a way, in particular with regard to the material from which the coating is formed, that excessive deposits on the surface are avoided and /or deposits on a surface can be counteracted.
  • the base body is provided with the coating, the base body can be formed from a different, more cost-effective material compared to the coating, so that it is particularly cost-effective and/or a particularly advantageous operation of the burner can be achieved in a weight-efficient manner.
  • the invention is based in particular on the following findings and considerations.
  • the coating can have an unfavorable influence, in particular on a flow of the respective part of the air, such as on the swirl-shaped flow, in particular in such a way that the flow cross sections of the burner, in particular the swirl chambers and in particular the swirl generating device, through which the air can flow are undesirable due to the matter can be narrowed.
  • the coating provided according to the invention is now a countermeasure by means of which excessive deposits in the burner can be avoided and/or excessive deposits can be counteracted.
  • all or at least cross-sectionally critical areas of the burner are directly limited by the coating and thus the surface.
  • all or at least cross-sectionally critical areas or components that come or can come into direct contact with the engine exhaust are formed or directly limited by the coating.
  • the coating is catalytically active.
  • the coating is carbon catalytically active for combustion of soot deposited on the coating.
  • This embodiment is based in particular on the knowledge that the aforementioned coating is formed in particular by soot from the exhaust gas of the internal combustion engine and can therefore be designed as so-called coking.
  • the coating can therefore in particular prevent excessive coking of flow-carrying areas or components of the burner. As a result, undesirable, excessive cross-sectional tapers in the burner can be avoided, so that an excessive drop in performance and poor starting behavior of the burner can be avoided.
  • a further embodiment is characterized in that the coating has at least cerium oxide, which is also simply referred to as cerium.
  • cerium oxide which is also simply referred to as cerium.
  • the coating has at least one coating component which can activate oxygen.
  • This coating component can in particular be the aforementioned cerium oxide, whereby, for example, deposits on the coating can be advantageously removed, in particular burned.
  • the coating has at least one noble metal, whereby, for example, the oxidation temperature of soot can be reduced. Soot, for example, can be particularly advantageously removed from the coating so that excessive deposits can be avoided or removed.
  • the coating allows at least one part of the air, that is to say the respective part of the air, to flow through
  • the swirl channel of the inner swirl chamber and/or outer swirl chamber formed in the spiral flow is at least partially, in particular at least predominantly or completely, directly limited.
  • This embodiment is based on the knowledge that that in particular the swirl channel can be a particularly small or narrow flow cross section, in particular the smallest or narrowest flow cross section, of the respective swirl chamber, in particular of the burner. An undesirable, excessive narrowing of the flow cross section would lead to an undesirable drop in performance and/or poor starting behavior of the burner, which can now, however, be advantageously avoided.
  • the first part of the air can be fed to the inner swirl chamber in the radial direction of the inner swirl chamber from the outside to the inside.
  • the first part of the air flows into the first swirl chamber not axially, but radially.
  • the second part of the air can be supplied to the outer swirl chamber in the radial direction of the outer swirl chamber from the outside to the inside.
  • the second part of the air flows into the outer swirl chamber not in the axial direction of the outer swirl chamber but in the radial direction of the outer swirl chamber, whereby a particularly advantageous mixture preparation can be achieved.
  • a second aspect of the invention relates to a motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, which has an internal combustion engine by means of which the motor vehicle can be driven.
  • the motor vehicle also has an exhaust gas tract through which exhaust gas from the internal combustion engine can flow, which has at least one burner according to the first aspect of the invention.
  • FIG. 1 shows a detail of a schematic sectional view of an exhaust tract of an internal combustion engine of a motor vehicle, with a burner;
  • Fig. 4 is a schematic longitudinal sectional view of the burner
  • Fig. 5 is a schematic perspective view of a swirl generating device
  • FIG. 6 is a schematic and perspective longitudinal sectional view of the swirl generating device
  • Fig. 7 is a further schematic longitudinal sectional view of the burner
  • Fig. 8 is a schematic sectional view of the burner.
  • Fig. 1 shows a detail in a schematic sectional view of an exhaust tract 10, also referred to as an exhaust system, of a motor vehicle preferably designed as a motor vehicle, in particular as a passenger car.
  • the motor vehicle has a drive device, not shown in the figures, by means of which the motor vehicle can be driven.
  • the motor vehicle also has the exhaust tract 10.
  • the motor vehicle is a land vehicle.
  • the drive device has an internal combustion engine, also referred to as an internal combustion engine or internal combustion engine which has an engine block, also known as a motor housing.
  • the internal combustion engine has at least one or more cylinders, which are formed or limited by the engine block, in particular directly.
  • a particularly liquid fuel is introduced into the respective cylinder within a respective working cycle of the internal combustion engine, in particular injected directly.
  • the internal combustion engine can be designed as a diesel engine, so that the fuel is preferably a diesel fuel.
  • a tank, referred to as a fuel tank, is also provided in which the fuel can be accommodated or accommodated.
  • a respective injector is assigned to the respective cylinder, by means of which the fuel can be introduced into the respective cylinder, in particular directly injected.
  • the fuel is conveyed from the tank to a high-pressure pump, by means of which the fuel is conveyed to the injectors or to a fuel distribution element common to the injectors and also referred to as a rail or common rail.
  • the injectors can be supplied with fuel from the fuel distribution element common to the injectors by means of the fuel distribution element and can introduce the fuel from the fuel distribution element into the respective cylinder, in particular inject it directly.
  • the drive device comprises, for example, an intake tract through which fresh air can flow, by means of which the fresh air flowing through the exhaust tract is guided to and into the cylinders.
  • the fresh air forms a fuel-air mixture with the fuel, which includes the fresh air and the fuel and is ignited in the respective cylinder within the respective working cycle and thereby burned.
  • the fuel-air mixture is ignited by self-ignition. Igniting and burning the fuel-air mixture results in the exhaust gas of the internal combustion engine, the exhaust gas of which is also referred to as machine exhaust gas or engine exhaust gas.
  • the drive device has, for example, the exhaust gas tract 10 through which the exhaust gas from the cylinder of the internal combustion engine can flow.
  • the internal combustion engine also includes, for example, an exhaust gas turbocharger, which has a compressor arranged in the intake tract and a turbine arranged in the exhaust tract.
  • the exhaust gas can initially flow from the cylinders into the Flow out of the turbine, flow out of the turbine into the exhaust tract 10 and then flow through the exhaust tract 10.
  • the turbine can be driven by the exhaust gas flowing through the exhaust tract 10.
  • the compressor can be driven by the turbine, in particular via a shaft of the exhaust gas turbocharger. By driving the compressor, the fresh air or ambient air flowing through the intake tract is compressed by means of the compressor.
  • a first of the components 11 is, for example, an oxidation catalyst, in particular a diesel oxidation catalyst (DOC).
  • DOC diesel oxidation catalyst
  • the first component 11 can be a nitrogen oxide storage catalyst (NSK) or the first component 11 can have such a nitrogen oxide storage catalyst.
  • a second of the components can be an SCR catalytic converter, which is also simply referred to as SCR.
  • a third of the components can be a particle filter, in particular a diesel particle filter (DPF), whereby the diesel particle filter (DPF) can also act as the first component 11.
  • a fourth of the components can be, for example, a second SCR catalyst and/or an ammonia barrier catalyst (ASC). In other words, for example, the fourth component can have a second SCR catalyst and/or an ammonia barrier catalyst.
  • the motor vehicle has a structure designed, for example, as a self-supporting body, which forms or delimits an interior of the motor vehicle, also referred to as a passenger cell or safety cell or passenger compartment. People can be in the interior while the motor vehicle is traveling.
  • the structure forms or delimits an engine compartment in which the internal combustion engine is arranged.
  • the exhaust gas turbocharger is also arranged in the engine compartment.
  • the structure also has a floor, also referred to as a main floor, through which the interior is at least partially, in particular at least predominantly or completely, limited downwards in the vertical direction of the vehicle.
  • the first component 11, the second component and the third component are arranged in the engine compartment, so that, for example, the first component, the second component and the third component forms a so-called hot end or is part of a so-called hot end.
  • the hot end can be flanged directly to the turbine.
  • the fourth component is, for example, arranged outside the engine compartment and below the floor in the vertical direction of the vehicle, so that, for example, the fourth component forms a so-called cold end or is part of a so-called cold end.
  • the exhaust tract 10 can include at least one metering device, by means of which a particularly liquid reducing agent can be introduced into the exhaust tract 10 and, for example, into the exhaust gas flowing through the exhaust tract 10 at an introduction point.
  • the reducing agent is preferably an aqueous urea solution, which can provide ammonia, which can react with any nitrogen oxides contained in the exhaust gas to form water and nitrogen during a selective catalytic reduction.
  • the selective catalytic reduction can be catalytically effected and/or supported by the SCR catalyst.
  • the introduction point is arranged, for example, upstream of the second component and downstream of the first component 11, with the second component being arranged downstream of the first component. It is also conceivable that the insertion point is arranged upstream of the first component 11.
  • the fourth component is arranged downstream of the third component, with the third component being arranged downstream of the second component.
  • the exhaust tract has a mixing chamber in which the reducing agent introduced into the exhaust gas at the point of introduction can advantageously be mixed with the exhaust gas, for example the mixing chamber can be arranged upstream of the second component and, for example, downstream of the first component.
  • the exhaust tract 10 and thus the drive device and the motor vehicle also include a burner 12, by means of which, as will be explained in more detail below, at least one of the components, for example the first component 11 and/or the second component and/or the third component and / or the fourth component can be heated up and/or kept warm quickly and efficiently, with the at least one component 11 being arranged in particular downstream of the burner 12.
  • the burner 12 can burn a mixture, in particular to form a flame, which results in burner exhaust gas from the burner 12, which provides the burner exhaust gas.
  • the burner exhaust gas or the flame can be introduced into the exhaust gas tract 10 at an introduction point E, that is, into an exhaust gas duct 14 of the exhaust gas tract 10 through which the exhaust gas can flow.
  • the burner 12 is arranged at the introduction point E.
  • the exhaust gas from the internal combustion engine is guided via an inflow line 15 in the exhaust gas duct 14 to the introduction point E of the burner 12 and discharged into the exhaust gas duct 14.
  • the inflow line 15 can be dispensed with, so that the exhaust gas from the internal combustion engine flows from the turbine into the exhaust duct 14.
  • the introduction point E is arranged upstream of the second component, upstream of the third component and upstream of the fourth component and downstream of the first component.
  • the burner 12 is arranged upstream of the second component, upstream of the third component and upstream of the fourth component and downstream of the first component.
  • the burner 12 or the introduction point E is arranged upstream of the first component 11 and in particular downstream of the turbine.
  • the aforementioned mixture to be burned in the burner 12 or by means of the burner 12 comprises air and a preferably liquid fuel.
  • the aforementioned fuel is used as the fuel.
  • at least a portion of the air that is supplied to the burner 12 and used to form the mixture can come, for example, from the intake tract.
  • a fuel supply path is provided which is, on the one hand, fluidly connected or connectable to the burner 12 and, on the other hand, fluidly connected to a fuel line.
  • the fuel can flow through the fuel line from the tank to the injectors or to the fuel distribution element.
  • the fuel supply path is fluidly connected to the fuel line at a first connection point, the first connection point being arranged downstream of the low-pressure pump and upstream of the high-pressure pump in the flow direction of the fuel flowing from the tank to the fuel distribution element or to the respective injector.
  • At the first connection point at least part of the fuel, in particular liquid fuel, flowing through the fuel line can be branched off from the fuel line and introduced into the fuel supply path.
  • the fuel introduced in the fuel supply path can flow through the fuel supply path and is conducted as valuable fuel by means of the fuel supply path to and in particular into the burner 12.
  • a first valve element is arranged in the fuel supply path, by means of which an amount of fuel flowing through the fuel supply path and thus to be supplied to the burner 12 can be adjusted.
  • an electronic computing device also known as a control device provided, by means of which the first valve element can be controlled, so that the amount of fuel flowing through the fuel supply path and to be supplied to the burner 12 can be adjusted, in particular regulated, by means of the control device via the first valve element.
  • the fuel supply path has a controlled pump for delivering the fuel from the tank to the burner 12.
  • an air supply path is provided, via which or by means of which the burner can be supplied or is supplied with the air to form the mixture.
  • a pump also known as an air pump
  • the air supply path is fluidly connected to the intake tract, for example, at a second connection point.
  • a second connection point can divert at least part of the fresh air flowing through the intake tract from the intake tract and introduce it into the air supply path.
  • the fresh air introduced into the air supply path can flow through the air supply path as the air for forming the mixture and is guided to and in particular into the burner 12 by means of the air supply path.
  • a second valve element is arranged in the air supply path, by means of which the amount of air that flows through the air supply path and thus flows through the burner 12 and is used to form the mixture can be adjusted.
  • control device is designed to control the second valve element so that, for example, by means of the control device via the second valve element, the amount of air flowing through the air supply path and thus to be supplied to the burner 12, which is used to form the mixture, can be adjusted, in particular regulated.
  • the air supply path preferably has a controlled or regulated pump for conveying air, in particular fresh air or ambient air. The air is preferably sucked in by the pump via an air filter of the air supply path and conveyed to the burner 12.
  • the burner 12 has a combustion chamber 16 in which the air supplied to the burner 12, also referred to as burner air, from which the mixture is formed, and the air supplied to the burner 12
  • the mixture comprising liquid fuel is to be ignited and thereby burned, that is to say ignited during operation of the burner 12 and thereby burned.
  • an ignition device 18 designed, for example, as a spark plug or glow plug or glow plug, in particular electrically operable, is provided, which is, for example, part of the burner 12.
  • the ignition device 18 By means of the ignition device 18, at least one ignition spark can be generated in the combustion chamber 16, in particular using electrical energy or electrical current.
  • the mixture is ignited in the combustion chamber 16 and subsequently burned, in particular by providing the burner exhaust gas and/or by providing the aforementioned flame.
  • the burner exhaust gas or by means of the flame for example, the exhaust gas flowing through the exhaust tract 10, that is to say the exhaust gas flowing through the exhaust duct 14, can be heated up and/or kept warm quickly and efficiently, so that by means of the heated and/or kept warm exhaust gas (engine exhaust gas), which, for example the first component 11 and the other components flow through, can be heated up quickly and efficiently and/or kept warm.
  • the burner 12 has a first, inner swirl chamber 20, through which a first part of the air, also referred to as burner air, which is supplied to the burner 12, can flow through or flows through and causes a first swirl-shaped flow of the first part of the air, thus to Effecting a first swirl-shaped flow of the first part of the air is formed.
  • a first part of the air also referred to as burner air
  • burner air which is supplied to the burner 12
  • first swirl-shaped flow of the first part of the air thus to Effecting a first swirl-shaped flow of the first part of the air is formed.
  • the first part of the air flows in a swirl pattern through at least a first portion of the swirl chamber 20 and/or flows out in a swirl pattern from the swirl chamber 20 and/or flows in a swirl pattern into and thus in the combustion chamber 16.
  • the inner swirl chamber 20 has, in particular, a first outflow opening 22, through which the first part of the air can flow along a first passage direction of the outflow opening 22 and thus along a first flow direction coinciding with the first passage direction.
  • the first part of the air can be removed from the inner swirl chamber 20 into the combustion chamber 16 via the first outflow opening 22.
  • the burner 12 includes an introduction element 24, presently in the form of an electrically operated injection element, which is provided by the In the present case liquid fuel, which is supplied to the burner 12, can flow through.
  • the introduction element 24 preferably, in particular precisely, has three outlet openings, also referred to as injection openings, through which the fuel supplied to the introduction element 24 can flow, the fuel flowing through the respective outlet openings flowing out of the introduction element 24, in particular as a whole.
  • the respective outlet openings are designed as a particularly round hole.
  • the respective outlet opening can be flowed through by the fuel, for example along a respective, second passage direction, so that the fuel flowing through the introduction element 24 can be ejected or can emerge from the introduction element 24 via the respective outlet opening and, in particular directly, can be injected into the inner swirl chamber 20 and thereby introduced is.
  • the second passage direction is slightly inclined to the axial direction of the swirl chamber 20, the axial direction of which, for example, coincides with the aforementioned first passage direction.
  • the axial direction of the swirl chamber 20 coincides with a burner longitudinal axis of the burner 12, which extends elongated, for example, along its burner longitudinal axis and in particular, for example, the swirl chamber 20 and / or the combustion chamber 16 can be designed rotationally symmetrical with respect to the burner longitudinal axis.
  • the introduction element 24 is in particular designed to eject the fuel from the outlet openings (not specified) in a clocked manner and thus to inject it in a clocked manner into the swirl chamber 20, in particular onto a surface which directly delimits the swirl chamber 20, in particular in the radial direction of the swirl chamber 20, and is designed as an inner circumferential surface 26 to spray on.
  • the swirl chamber 20 is at least partially, in particular at least predominantly and therefore at least more than half or completely, directly delimited by the surface 26, which in the present case is an inner circumferential surface.
  • the respective, second passage direction of the respective outlet opening coincides with a respective, second flow direction along which the fuel can flow through the respective outlet opening and thus flow out of the introduction element 24 (injection element).
  • the fuel can be sprayed out of the introduction element 24 via the respective outlet opening, in particular to form a respective fuel jet, and thereby injected, in particular directly, into the swirl chamber 20.
  • the respective fuel jet whose longitudinal center axis coincides, for example, with the respective second passage direction or with the respective second flow direction, is at least essentially club-shaped or conical.
  • the insertion element 24 has a longitudinal direction or longitudinal extent or longitudinal extension direction, which runs parallel to the first passage direction and thus parallel to the first flow direction and parallel to the axial direction of the inner swirl chamber 20, in particular with the first passage direction and thus with the first flow direction and thus in particular with the axial Direction of the inner swirl chamber 20 coincides.
  • the respective second passage direction runs perpendicularly or, in this case, obliquely to the first passage direction and thus to the first flow direction and to the axial direction of the inner swirl chamber 20 and the first outflow opening 22.
  • the inner swirl chamber 20 is at least partially, in particular at least predominantly and therefore more than half or completely, formed or limited by a component 28 of the burner 12, so that component 28 also forms or delimits the first outflow opening 22, in particular directly.
  • the component 28 thus forms, for example, the surface 26.
  • the component 28 is also referred to as a prefilmer or film layer.
  • the burner 12 further has an outer swirl chamber 30, which surrounds at least one length region and in the present case also the first outflow opening 22 in the circumferential direction of the inner swirl chamber 20, which extends around the axial direction of the inner swirl chamber 20, in particular completely circumferentially.
  • the component 28 has a partition 32 which is arranged between the swirl chambers 20 and 30 in the radial direction of the inner swirl chamber 20 and thus in the radial direction of the outer swirl chamber 30, the radial direction of which coincides with the radial direction of the swirl chamber 20.
  • the swirl chambers 20 and 30, whose axial directions coincide are separated from one another in the radial direction of the swirl chambers 20 and 30 by the partition 32.
  • the axial direction of the swirl chamber 20 coincides with the axial direction of the swirl chamber 30, with the radial direction of the swirl chamber 20 coinciding with the radial direction of the swirl chamber 30.
  • a second part of the air supplied in the burner 12 can flow through the outer swirl chamber 30 and is designed to cause a second swirl-shaped flow of the second part of the air. This means that the second part of the air flows through the swirl chamber 30 in a swirl pattern and/or flows out of the swirl chamber 30 in a swirl pattern and/or flows in a swirl pattern into and thus in the combustion chamber 16.
  • the second part of the air flows through at least a second portion of the outer swirl chamber 30 in a swirling manner and/or flows out of the swirl chamber 30 in a swirl pattern and/or flows in a swirl pattern into and thus in the combustion chamber 16.
  • the component 28 forms a surface 33 designed as an outer peripheral lateral surface.
  • the surface 33 is therefore part of the partition 32 and is oriented toward the outer swirl chamber 30.
  • the outer swirl chamber 30 has, in particular precisely, a second outflow opening 34 which can flow through the second part of the air flowing through the outer swirl chamber 30, in particular along a third flow direction, the third passage direction of which coincides with the third flow direction, along which the outflow opening 34 of the second part of the air flowing through the swirl chamber 30 can flow through, in the present case coinciding with the axial direction of the swirl chamber 30 and thus the axial direction of the swirl chamber 20.
  • the third passage direction coincides with the third flow direction, along which the second part of the air flowing through the outer swirl chamber 30 flows or can flow through the outflow opening 34.
  • the first passage direction coincides with the third passage direction and the first flow direction coincides with the third flow direction, so that in the present case the first flow direction, the third flow direction, the first passage direction and third passage direction coincide with the axial direction of the swirl chamber 20 and with the axial direction the swirl chamber 30 coincide.
  • the second outflow opening 34 is arranged downstream of the first outflow opening 22 and in particular is arranged or connected in series or in series with the outflow opening 22, so that the second outflow opening 34 the second part of the air, the first part of the air and the fuel can flow through.
  • the first part of the air is already mixed with the fuel in the swirl chamber 20, in particular to form a partial mixture.
  • the partial mixture can flow through the outflow opening 22 and thus flow out of the swirl chamber 20 and then flow through the second outflow opening 34 and is mixed with the second part of the air, in particular due to the advantageous, second swirl-shaped flow, whereby the mixture is prepared in a particularly advantageous manner, i.e. that Partial mixture is particularly advantageously mixed with the second part of the air.
  • the swirl chamber 30 is at least partially, in particular at least predominantly and therefore at least more than half or completely, limited in the radial direction of the respective swirl chamber 20, 30 inwards by the component 28, in particular by the partition 32 is.
  • the swirl chamber 20 is limited to the outside in the radial direction of the respective swirl chamber 20, 30 at least partially, in particular at least predominantly or completely, by the component 28, in particular by the partition 32.
  • the outer swirl chamber 30 is at least partially, in particular at least predominantly or completely, limited by a component 36 of the burner 12.
  • the swirl chamber 20 is at least partially delimited towards the outside in the radial direction of the swirl chamber 20, 30 by the surface 26, in particular directly.
  • the swirl chamber 30 is delimited, in particular directly, in the radial direction of the respective swirl chamber 20, 30 towards the outside at least partially by a second surface 38, which is in the present case designed as an inner circumferential surface, the second surface 38 being formed in particular by the component 36. Furthermore, the swirl chamber 30 is at least partially delimited inwards in the radial direction of the respective swirl chamber 20, 30 by a surface 33, which is in the present case designed as an outer circumferential surface, in particular directly, the surface 33 being formed in particular by the component 28
  • the component 36 and the component 28 are components designed separately from one another and in particular connected to one another.
  • the component 28 is at least partially, in particular at least predominantly, arranged in the component 36.
  • the second outflow opening 34 is, for example, at least partially, in particular at least predominantly and therefore at least more than half or completely, limited or formed by the component 36 or the second outflow opening 22 is, for example, partly through the component 36 and partly through the component 28, in particular directly, limited or formed, in particular with regard to the smallest or smallest flow cross section of the outflow opening 34 through which the second part of the air can flow.
  • the combustion chamber 16 is at least partially, in particular at least predominantly or completely, delimited, in particular directly, by a chamber element 40 of the burner 12.
  • the chamber element 40 has a surface 42 designed as an inner circumferential surface, through which the combustion chamber 16 is at least partially directly delimited is.
  • the combustion chamber 16 is at least partially, in particular at least predominantly completely, delimited towards the outside in the radial direction of the respective swirl chamber 20, 30, preferably directly by the surface 42.
  • the chamber element 40 has a wall 44 which extends in the axial direction of the respective swirl chamber 20, 30 and thus in the first and third flow direction from the outflow openings 22 and 34 is spaced apart, the combustion chamber 16 extending in the axial direction of the respective swirl chamber 20, 30 and in the first or third flow direction, i.e. in a limiting direction which runs parallel to the axial direction in the respective swirl chamber 20, 30 and points away from the swirl chambers 20 and 30 the wall 44 is limited, in particular by a surface 46 of the wall 44 and thus of the chamber element 40. It is conceivable that the surfaces 42 and 46 are components of an overall surface of the chamber element 40 on the inner circumference. As can be seen particularly well from FIG.
  • the wall 44 is penetrated by several through openings 48, which completely penetrate the wall 44.
  • the through openings 48 are arranged successively and spaced apart from one another in the circumferential direction extending around the respective axial direction of the respective swirl chamber 20, 30 and are in particular arranged evenly distributed.
  • the through openings 48 are circular and thus designed as circles, the centers of which lie on another circle, the center of which lies on the axial direction of the respective swirl chamber 20, 30.
  • the swirl chamber 30 is designed to be rotationally symmetrical with respect to its axial direction and thus in particular with respect to the burner's longitudinal axis.
  • the burner exhaust gas from the combustion chamber 16 can flow through the through openings 48 and thus flow out of the combustion chamber 16 via the through openings 48 and, in particular, flow into the exhaust gas tract 10, that is, into the exhaust gas duct 14, at the introduction point E.
  • FIG. 4 it can be seen that the swirl-shaped flows in the combustion chamber 16, which are collectively designated 50 in FIG run helically or helically.
  • a first exhaust part of the burner exhaust gas can, for example, flow through the through opening 48 and thereby into the exhaust gas exhaust system, in particular in the exhaust duct 14 flows in.
  • a second exhaust part of the burner exhaust gas for example, initially flows against the wall 44 and is thereby deflected by means of the wall 44 and in particular deflected back (arrow 52), in particular in the direction of the surface 42 and / or the outflow opening 34, whereupon, for example, at least part of the second exhaust part Through opening 48 can flow through. This allows a particularly advantageous mixture preparation to be achieved by means of the existing backflow (arrow 52) in the combustion chamber 16.
  • the component 28 and the component 36 can be seen particularly well in FIGS. 4, 5 and 6.
  • the component 28 is at least partially inserted into the component 36.
  • the component 28 and the component 36 form a swirl generating device 54 of the burner 12.
  • the swirl generating device 54 comprises a first swirl generator 56, which are also referred to as first swirl generating elements and are designed, for example, as first guide vanes.
  • the first swirl generators 56 are the first swirl generators of the inner swirl chamber 20.
  • the component 28 has the first swirl generators 56.
  • the swirl generating device 54 also includes second swirl generators 58, which are also referred to as second swirl generating elements.
  • the second swirl generators 58 are second guide vanes.
  • the second swirl generators 58 are second swirl generators of the outer swirl chamber 30.
  • the component 36 has the second swirl generators 58.
  • the swirl generators 56 and 58 are arranged successively and in particular at a distance from one another in the circumferential direction extending around the axial direction of the respective swirl chamber 20, 30, in particular in such a way that swirl channels 60 and 62 are arranged in the circumferential direction of the respective swirl chamber 20, 30 between the swirl generators 56 and 58 are.
  • the swirl channels 60 and 62 are therefore arranged successively and at a distance from one another in the circumferential direction of the respective swirl chamber 20, 30 and are separated from one another in such a way that one of the respective swirl generators 56 and 58 is arranged in the circumferential direction of the respective swirl chamber 20, 30 between two of the swirl channels 60 and 62 is.
  • the respective swirl channel 60, 62 is directly delimited on both sides in the circumferential direction of the respective swirl chamber 20, 30 by two of the swirl generators 56 and 58, respectively.
  • the respective swirl channel is through on both sides in the circumferential direction of the respective swirl chamber 20, 30 respective surfaces 64, in particular of the component 28, are directly limited.
  • the respective swirl channel 62 is directly delimited on both sides in the circumferential direction of the respective swirl chamber 20, 30 by respective surfaces 65, in particular of the component 36.
  • the component 28 or the inner swirl chamber 20 is also referred to as a prefilmer or film layer.
  • the swirl generators 56 form a first swirl generating device 55 of the inner swirl chamber 20, wherein the first swirl-shaped flow of the first part of the air can be brought about or is brought about by means of the swirl generating device 55.
  • the second swirl generators 58 form a second swirl generating device 57 of the outer swirl chamber 30, wherein the second swirl-shaped flow of the second part of the air can be or is effected by means of the second swirl generating device 57.
  • the swirl generating devices 55 and 57 are components of the swirl generating device 54.
  • the swirl generating device 55 is formed by the component 28, and the swirl generating device 57 is formed by the component 36.
  • the first outflow opening 22 ends, for example in the flow direction of the first part of the air flowing through the first outflow opening 22, at a preferably specifically processed, sharp-edged end edge K (FIG. 6), which is formed by an atomizer lip 67, in particular designed as a solid body, which is in the flow direction of the
  • the first part of the air flowing through the first outflow opening 22 can taper up to the end edge K and ends, for example, at the end edge K.
  • the atomizer lip 67 is part of the component 28 or is formed by the component 28.
  • the first outflow opening 22 in the flow direction of the first part of the air flowing through the first outflow opening 22 and thus in the flow direction of the fuel flowing through the first outflow opening 22 ends at the preferably specifically processed and therefore sharp or razor-sharp end edge K, which is formed by the atomizer lip 67, which is in particular designed as a solid body, which is preferably in the flow direction of the first part of the air flowing through the first outflow opening 22 and thus in the flow direction of the fuel flowing through the first outflow opening 22 in particular tapers up to the end edge K and in particular ends at the end edge K.
  • the atomizer lip 67 has a taper that tapers in the first flow direction and thus in particular towards the combustion chamber 16, which ends, in particular, only at the end edge K.
  • the taper or the atomizer lip 67 is sharp-edged.
  • the atomizer lip 67 ends with a sharp edge, which means that a particularly advantageous mixture preparation can be achieved.
  • the particularly razor-sharp end edge K is formed by the atomizer lip 67, which in the present case is formed by the component 28.
  • the atomizer lip 67 tapers in the flow direction of the first part of the air flowing through the first outflow opening 22 and thus in the flow direction of the fuel flowing through the first outflow opening 22 up to the end edge K and ends at the end edge K.
  • the component 28, in particular the inner swirl chamber 20 in the radial direction of the swirl chamber 20 towards the outside and at least partially and directly delimiting the inner peripheral surface (surface 26), is a film layer or as a film layer between the swirl chambers 20 and 30 and thus between the swirl-shaped and therefore wired flows, also known as air flow.
  • the inner peripheral surface or the film layer is formed by the aforementioned partition 32.
  • the introduction element 24 the fuel flowing through the outlet opening and thus emerging, in particular sprayed out, from the introduction element 24 is applied, in particular as a film also referred to as a fuel film, to the film layer, in particular to the surface 26, or is atomized onto the film layer.
  • the fuel that has emerged from the introduction element 24, in particular that has been sprayed out, and is thereby introduced, in particular directly, into the inner swirl chamber 20, in particular injected, that is to say injected, is in particular higher than the fuel previously injected said film onto the film layer, in particular onto the surface 26, and flows or flows downstream to the first outflow opening 22 and thus to the end edge K.
  • the fuel is applied to the atomizer lip 67 and conveyed or transported to the end edge K.
  • the first outflow opening 22 preferably ends at the preferably razor-sharp end edge K, which here has only a small area due to the previously described taper or provides so that no excessively large droplets of fuel can form at the end edge K. Due to the appropriate design of the atomizer lip 67 and in particular the end edge K, only tiny droplets of the fuel tear off at the end edge K. In other words, only particularly small, i.e. tiny, droplets arise from the aforementioned fuel film at the end edge K, which break off at the end edge K, in particular from the atomizer lip 67 or from the component 28, and have a correspondingly large surface area. This effect leads to a particularly low-soot combustion of the mixture in the combustion chamber 16.
  • tiny droplets of fuel can be produced without complex, high injection pressures of the fuel and without costly injection elements, so that on the one hand the costs of the burner 12 can be kept particularly low.
  • particularly small droplets of fuel can be generated, so that even very small outputs of the burner 12 can be represented.
  • the second part of the air of the outer swirl chamber 30 can be fed in the radial direction of the outer swirl chamber 30 from the outside to the inside, and can therefore be introduced into the outer swirl chamber 30 from the outside inwards in the radial direction of the outer swirl chamber 30.
  • This is to be understood in particular as meaning that the first part of the air or the second part of the air can be introduced into the respective swirl chamber 20, 30 in a respective flow plane, that is to say in a respective inflow direction running in the respective flow plane, the flow plane being perpendicular to the axial direction of the respective swirl chamber 20, 30.
  • the respective swirl channel 60 can be flowed through in a fourth flow direction by a respective part of the first part of the air and thereby in the radial direction of the swirl chamber 20 from the outside to the inside, in order to thereby flow through the first part to supply the air to the swirl chamber 20, thus introducing it into the swirl chamber 20, the fourth flow direction running in a first flow plane which runs perpendicular to the axial direction of the swirl chamber 20.
  • a respective part of the second part of the air can flow through the respective swirl channel 62 in a fifth flow direction and thereby in the radial direction of the swirl chamber 30 from the outside to the inside, in order to thereby supply the second part of the air to the swirl chamber 30, i.e. into the swirl chamber 30 initiate, wherein the fifth flow direction runs in a second flow plane, which runs perpendicular to the axial direction of the swirl chamber 30.
  • the first flow plane and the second flow plane are spaced apart from one another, particularly in the axial direction of the respective swirl chamber 20, 30, or the flow planes coincide.
  • the surface 26 limits the outflow opening 22, in particular directly.
  • the surface 38 delimits the outflow opening 34, in particular directly.
  • the surfaces 42 and 46 each delimit the combustion chamber 16 at least partially and in particular directly.
  • the surface 64 and/or 65 which at least partially directly delimits the respective swirl channel 60 or 62, is formed by a coating with which a base body carrying the coating is provided.
  • the feature that at least one of the surfaces 26, 33, 38, 42, 46, 64 and 65 is formed by a coating with which a base body carrying the coating is provided is shown in FIG. 8 using the example of the respective surface 64 and thus of component 28 illustrated. It can be seen that the respective surface 64 completely and directly delimits the respective swirl channel 60 in the present case.
  • the respective surface 64 is formed by the aforementioned coating, designated 66 in FIG. 8, with which the base body, designated 68 in FIG. 8 and carrying the coating 66, is provided.
  • the respective coating 66 is applied to the base body 68.
  • the base body 68 is, for example, formed in one piece, i.e formed in a single piece. In the exemplary embodiment shown in FIG. 8, the base body 68 is only provided locally with the coatings 66, so that the coatings 66 are spaced apart from one another.
  • the base body 68 is first produced and provided and then, that is after the base body 68 has been produced, in particular locally, it is provided with the respective coating 66, which forms the respective surface 64, which respective swirl channel 60, in particular completely, directly limited.
  • the base body 68 is formed from a first material, with the respective coating 66 being formed from a second material that is different from the first material.
  • the component 28 includes the base body 68 and the respective coating 66.
  • the base body 68 and the respective coating 66 are part of the component 28.
  • the base body 68 is preferably formed in one piece, and is therefore formed from a single piece, that is to say formed by a single piece.
  • the coating 66 is applied to the base body 68 by a thermal spray process or deposition welding.
  • a flow of engine exhaust gas is schematically illustrated and shown at 70.
  • the flow 70 of the engine exhaust gas occurs, for example, when the internal combustion engine is in fired operation and provides the engine exhaust gas, which flows through the exhaust tract 10, while the burner 12 is deactivated, that is, while the burner 12 does not provide any burner exhaust gas. From Fig. 7 it can be seen that at least part of the exhaust gas flowing through the exhaust tract 10 or the exhaust duct 14 then flows from the exhaust duct 14 into the combustion chamber 16, in particular via the through opening 48, and to the swirl generating devices 55 and 57 and thus to the swirl generators 56 and 58 can advance.
  • any components contained in the engine exhaust gas can be deposited on the surface 64, for example, which can lead to an undesirable cross-sectional narrowing or tapering of the swirl channels 60. This is also referred to as coking of the swirl channels 60 or the swirl generating device 55.
  • the respective surface 64 is formed by the respective coating 66.
  • the respective coating is 66 designed in such a way that any soot deposits on the surface 64 can be easily removed, in particular burned and thereby removed.
  • the coating 66 or the second material from which the coating 66 is formed is catalytically active for oxidation of soot deposited on the surface 64 and thus on the coating 66.
  • the coating 66 comprises at least cerium oxide and/or at least one noble metal such as gold and/or platinum.
  • a metallocene in particular ferrocene
  • the ferrocene can be added to the contents of the tank as an additive.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

L'invention concerne un brûleur (12) pour un tuyau d'échappement (10) à travers lequel les gaz d'échappement d'un moteur à combustion interne d'un véhicule à moteur peuvent s'écouler, comprenant : une chambre de combustion (16) dans laquelle un mélange contenant de l'air et du carburant peut être enflammé et ainsi brûlé ; une chambre de turbulence interne (20) dans laquelle une première partie de l'air peut s'écouler, et qui comporte un premier dispositif de génération de turbulences (55) permettant de produire un écoulement tourbillonnaire (50) de la première partie de l'air, ainsi qu'une première ouverture de sortie (22) par laquelle la première partie de l'air s'écoulant dans la chambre de turbulence interne (20) peut s'écouler et par laquelle la première partie de l'air peut être évacuée hors de la chambre de turbulence interne (20) ; et un élément d'admission (24) à travers lequel le carburant peut s'écouler et au moyen duquel le carburant peut être introduit dans la chambre de turbulence interne (20), le carburant évacué par l'élément d'admission (24) pouvant également s'écouler par la première ouverture de sortie (22) de la chambre de turbulence interne. Le premier dispositif de génération de turbulences (55) ainsi qu'un second dispositif de génération de turbulences (57) comportent un revêtement (66) sur les surfaces (26, 33, 38, 64, 65) qui délimitent au moins en partie directement la chambre de turbulences interne (20) et/ou la chambre de turbulences externe (30), ledit revêtement (66) étant appliqué sur la partie principale (68) du brûleur (12) et ayant une action catalytique.
PCT/EP2023/065266 2022-06-13 2023-06-07 Brûleur pour véhicule automobile et véhicule automobile comportant au moins un tel brûleur WO2023242031A1 (fr)

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DE102022002121.8 2022-06-13
DE102022002121.8A DE102022002121B4 (de) 2022-06-13 2022-06-13 Brenner für ein Kraftfahrzeug sowie Kraftfahrzeug mit wenigstens einem solchen Brenner

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306743A2 (fr) * 1987-09-05 1989-03-15 Deutsches Zentrum für Luft- und Raumfahrt e.V. Procédé de filtrage de suie et filtre de suie pour un moteur diesel
DE4417769A1 (de) 1994-05-20 1995-11-23 Abb Research Ltd Verfahren zum Betrieb eines Vormischbrenners
AT406706B (de) 1997-03-12 2000-08-25 Schwarz A & Co Brenner für gas- und ölheizkessel
DE10055613A1 (de) 2000-11-09 2002-05-23 Xcellsis Gmbh Verfahren zur Zufuhr von Brennstoff und/oder thermischer Energie in einen Gasstrom
DE10211590A1 (de) 2002-03-15 2003-10-09 Eberspaecher J Gmbh & Co Zerstäuberdüse, insbesondere für ein Fahrzeugheizgerät
WO2007022926A1 (fr) * 2005-08-20 2007-03-01 Technische Universität Kaiserslautern Dispositif, reacteur et procede de reduction d'oxydes d'azote dans les gaz d'echappement de moteurs a combustion interne
WO2010072440A1 (fr) * 2008-12-22 2010-07-01 Robert Bosch Gmbh Module de dosage pour un agent réducteur liquide
DE112012001599T5 (de) 2011-04-06 2014-01-02 Basf Corporation Verfahren zum Bereitstellen von Beschichtungen mit hoher Oberfläche, um Kohlenwasserstoff-Ablagerungen auf Motoren- und Triebwerks-Komponenten abzuschwächen
DE112012001594T5 (de) 2011-04-06 2014-02-06 Basf Corporation Beschichtungen für Motoren- und Triebwerks-Komponenten zur Verhinderung der Ansammlung von Ablagerungen

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306743A2 (fr) * 1987-09-05 1989-03-15 Deutsches Zentrum für Luft- und Raumfahrt e.V. Procédé de filtrage de suie et filtre de suie pour un moteur diesel
DE3729861C2 (de) 1987-09-05 1995-06-22 Deutsche Forsch Luft Raumfahrt Verfahren zum Betreiben einer Rußfiltervorrichtung für einen Dieselmotor und Rußfiltervorrichtung zur Durchführung dieses Verfahrens
DE4417769A1 (de) 1994-05-20 1995-11-23 Abb Research Ltd Verfahren zum Betrieb eines Vormischbrenners
AT406706B (de) 1997-03-12 2000-08-25 Schwarz A & Co Brenner für gas- und ölheizkessel
DE10055613A1 (de) 2000-11-09 2002-05-23 Xcellsis Gmbh Verfahren zur Zufuhr von Brennstoff und/oder thermischer Energie in einen Gasstrom
DE10211590A1 (de) 2002-03-15 2003-10-09 Eberspaecher J Gmbh & Co Zerstäuberdüse, insbesondere für ein Fahrzeugheizgerät
WO2007022926A1 (fr) * 2005-08-20 2007-03-01 Technische Universität Kaiserslautern Dispositif, reacteur et procede de reduction d'oxydes d'azote dans les gaz d'echappement de moteurs a combustion interne
WO2010072440A1 (fr) * 2008-12-22 2010-07-01 Robert Bosch Gmbh Module de dosage pour un agent réducteur liquide
DE112012001599T5 (de) 2011-04-06 2014-01-02 Basf Corporation Verfahren zum Bereitstellen von Beschichtungen mit hoher Oberfläche, um Kohlenwasserstoff-Ablagerungen auf Motoren- und Triebwerks-Komponenten abzuschwächen
DE112012001594T5 (de) 2011-04-06 2014-02-06 Basf Corporation Beschichtungen für Motoren- und Triebwerks-Komponenten zur Verhinderung der Ansammlung von Ablagerungen

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DE102022002121A1 (de) 2023-12-14

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