DE102010025699A1 - Internal combustion engine i.e. diesel engine, operating method, involves arranging branches for separating partial exhaust gas flow to exhaust gas recirculation in housing of nitrogen oxide-storage catalyst - Google Patents
Internal combustion engine i.e. diesel engine, operating method, involves arranging branches for separating partial exhaust gas flow to exhaust gas recirculation in housing of nitrogen oxide-storage catalyst Download PDFInfo
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- DE102010025699A1 DE102010025699A1 DE102010025699A DE102010025699A DE102010025699A1 DE 102010025699 A1 DE102010025699 A1 DE 102010025699A1 DE 102010025699 A DE102010025699 A DE 102010025699A DE 102010025699 A DE102010025699 A DE 102010025699A DE 102010025699 A1 DE102010025699 A1 DE 102010025699A1
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- exhaust gas
- line
- exhaust
- gas recirculation
- nox storage
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Classifications
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- 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
- F01N13/0097—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 the purifying devices are arranged in a single housing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
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- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
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- 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
- F01N3/103—Oxidation catalysts for HC and CO only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
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- 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
- F01N2240/36—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 an exhaust flap
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/08—Gas passages being formed between the walls of an outer shell and an inner chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
Abstract
Description
Die Erfindung betrifft eine Brennkraftmaschine, insbesondere einen Dieselmotor, mit Mitteln zur Abgasnachbehandlung und Mitteln zur Abgasrückführung, umfassend einen Luftansaugstrang und einen Abgasstrang, wobei im Abgasstrang zumindest ein Rußpartikelfilter angeordnet und diesem ein NOx-Speicherkatalysator nachgeordnet ist und wobei ein Abgasrückführstrang vom Abgasstrang abzweigt und in den Luftansaugstrang mündet. Darüber hinaus betrifft die Erfindung ein Verfahren zum Betrieb einer derartigen Brennkraftmaschine.The invention relates to an internal combustion engine, in particular a diesel engine, with means for exhaust aftertreatment and exhaust gas recirculation means comprising an air intake and an exhaust line, wherein arranged in the exhaust line at least one particulate filter and this is followed by a NOx storage catalyst and wherein an exhaust gas recirculation branch branches off the exhaust line and in the air intake line opens. Moreover, the invention relates to a method for operating such an internal combustion engine.
Mittel zur Abgasnachbehandlung finden sich an allen zeitgemäßen Brennkraftmaschinen und sind umgänglich für die Reduzierung der Schadstoffe im Abgas. Darüberhinaus sind Mittel zur Abgasrückführung insbesondere bei aufgeladenen Dieselmotoren bei zeitgemäßen Brennkraftmaschinen zunehmend im Einsatz, wobei hiermit ebenfalls eine Schadstoffreduzierung und darüber hinaus Verbrauchsverbesserungen zu erzielen sind.Means for exhaust aftertreatment can be found on all modern internal combustion engines and are treatable for the reduction of pollutants in the exhaust gas. In addition, means for exhaust gas recirculation, especially in supercharged diesel engines in modern internal combustion engines increasingly in use, and hereby also a pollutant reduction and beyond fuel consumption improvements can be achieved.
Weitgehend gebräuchlich ist bei Dieselmotoren die Verwendung eines Stickstoffspeicherkatalysators (NSC) und eines Rußpartikelfilters (DPF) im Abgasstrang, wobei in der Regel nach diesen beiden Komponenten die Abzweigung eines Abgasteilstromes vom Abgashauptstrom zur Abgasrückführung (AGR) erfolgt.In diesel engines, the use of a nitrogen storage catalytic converter (NSC) and a soot particle filter (DPF) in the exhaust system is largely customary, with the branching of a partial exhaust gas flow usually taking place from the main exhaust gas flow to exhaust gas recirculation (EGR) according to these two components.
Aus der
Der vorliegenden Erfindung liegt die Aufgabe zu Grunde, eine Brennkraftmaschine der genannten Art und ein Verfahren zu ihrem Betrieb bereitzustellen, mit dem sich die Wirkung der genannten Mittel zur Abgasnachbehandlung und zur Abgasrückführung im Hinblick auf den Schadstoffausstoß und/oder den Kraftstoffverbrauch der Brennkraftmaschine weiter verbessern läßt. Die Lösung hierfür liegt in einem Verfahren zum Betrieb einer Brennkraftmaschine sowie in einer Brennkraftmaschine nach den unabhängigen Patentansprüchen.The present invention is based on the object to provide an internal combustion engine of the type mentioned and a method for their operation, with which the effect of said means for exhaust aftertreatment and exhaust gas recirculation in terms of pollutant emissions and / or fuel consumption of the internal combustion engine can be further improved , The solution to this lies in a method for operating an internal combustion engine and in an internal combustion engine according to the independent claims.
Die Brennkraftmaschine, insbesondere ein Dieselmotor, mit Mitteln zur Abgasnachbehandlung und Mitteln zur Abgasrückführung, weist einen Luftansaugstrang, in dem vorzugsweise ein Verdichter eines Abgasturboladers angeordnet ist, und einen Abgasstrang, in dem vorzugsweise eine Turbine des Abgasturboladers angeordnet ist, auf, wobei der Turbine im Abgasstrang zumindest ein Rußpartikelfilter (DPF) und diesem wiederum ein NOx-Speicherkatalysator (NSC) nachgeordnet ist und wobei ein Abgasrückführstrang (AGR) vom Abgasstrang vorzugsweise hinter dem Rußpartikelfilter (DPF) und vor dem NOx-Speicherkatalysator (NSC) abzweigt und vor dem Verdichter des Abgasturboladers in den Luftansaugstrang mündet.The internal combustion engine, in particular a diesel engine, with means for exhaust aftertreatment and means for exhaust gas recirculation, has an air intake line, in which a compressor of an exhaust gas turbocharger is preferably arranged, and an exhaust line in which a turbine of the exhaust gas turbocharger is preferably arranged, wherein the turbine Exhaust line at least one particulate filter (DPF) and this in turn downstream of a NOx storage catalytic converter (NSC) and wherein an exhaust gas recirculation (EGR) from the exhaust line preferably behind the particulate filter (DPF) and before the NOx storage catalytic converter (NSC) branches off and before the compressor of the Exhaust gas turbocharger discharges into the air intake line.
Das erfindungsgemäße Verfahren zum Betrieb einer solchen Brennkraftmaschine zeichnet sich dadurch aus, dass eine Abtrennung eines Abgasteilstroms zur Abgasrückführung in einem Gehäuse des NOx-Speicherkatalysators (NSC) erfolgt.The inventive method for operating such an internal combustion engine is characterized in that a separation of a partial exhaust gas flow to exhaust gas recirculation takes place in a housing of the NOx storage catalytic converter (NSC).
Die erfindungsgemäße Brennkraftmaschine, insbesondere ein Dieselmotor, mit Mitteln zur Abgasnachbehandlung und Mitteln zur Abgasrückführung, weist einen Luftansaugstrang und einen Abgasstrang auf, wobei in dem Abgasstrang zumindest ein Rußpartikelfilter angeordnet ist und dem Rußpartikelfilter ein NOx-Speicherkatalysator nachgeordnet ist und wobei ein Abgasrückführstrang vom Abgasstrang abzweigt und in den Luftansaugstrang mündet, wobei eine Abzweigung zum Abtrennen eines Abgasteilstroms für die Abgasrückführung in einem Gehäuse des NOx-Speicherkatalysators angeordnet ist.The internal combustion engine according to the invention, in particular a diesel engine, with means for exhaust aftertreatment and means for exhaust gas recirculation, has a Luftansaugstrang and an exhaust line, wherein in the exhaust line at least one particulate filter is arranged and the particulate filter is arranged downstream of a NOx storage catalyst and wherein an exhaust gas recirculation branch branches off the exhaust line and opens into the air intake line, wherein a branch for separating a partial exhaust gas flow for the exhaust gas recirculation is arranged in a housing of the NOx storage catalytic converter.
Hierdurch wird der NOx-Speicherkatalysator nicht mit einem übermäßig großen Abgasstrom beaufschlagt, indem nämlich der Abgasteilstrom zur Abgasrückführung von der Abgasnachbehandlung insoweit ausgeschlossen wird. Durch eine Wärmeübertragung zwischen der Abzweigung für die Abgasrückführung und Gehäuseteilen des NOx-Speicherkatalysators kommt es weiterhin im Betrieb vorteilhaft zu einer schnelleren Aufheizung des NOx-Speicherkatalysators, so dass insbesondere in der Startphase der Brennkraftmaschine der Schadstoffausstoß reduziert werden kann.As a result, the NOx storage catalytic converter is not acted upon by an excessively large exhaust gas flow, namely by excluding the exhaust gas partial flow for exhaust gas recirculation from the exhaust gas aftertreatment to that extent. By a heat transfer between the diversion for the exhaust gas recirculation and housing parts of the NOx storage catalytic converter continues to come in operation advantageously to a faster heating of the NOx storage catalytic converter, so that in particular in the starting phase of the internal combustion engine pollutant emissions can be reduced.
Vorzugsweise ist in dem Luftansaugstrang ein Verdichter eines Abgasturboladers angeordnet und in dem Abgasstrang eine Turbine des Abgasturboladers, wobei der Turbine im Abgasstrang der Rußpartikelfilter und diesem wiederum ein NOx-Speicherkatalysator nachgeordnet ist. Der Abgasrückführstrang zweigt vom Abgasstrang vorzugsweise hinter dem Rußpartikelfilter ab und mündet in der Regel vor dem Verdichter des Abgasturboladers in den Luftansaugstrang.Preferably, a compressor of an exhaust gas turbocharger is arranged in the air intake line and in the exhaust line a turbine of the exhaust gas turbocharger, wherein the turbine in the exhaust line of the particulate filter and this in turn downstream of a NOx storage catalyst. The exhaust gas recirculation line preferably branches off from the exhaust gas line behind the soot particle filter and, as a rule, discharges into the air intake line upstream of the compressor of the exhaust gas turbocharger.
Unter einer Abzweigung zum Abtrennen eines Abgasteilstroms im Sinne der Erfindung sind diejenigen Leitungsteile des Abgasstrangs und des Abgasrückführstrangs zu verstehen, welche den ungeteilten Abgasstrom in den Abgasteilstrom für die Abgasrückführung und den Abgashauptstrom zum Ausstoß durch den Abgasstrang aufteilen. Im Sinne der Erfindung sind insbesondere die Leitungsteile des Abgasrückführstrangs, welche sich unmittelbar stromab der eigentlichen Trennstelle anschließen, Bestandteil der Abzweigung, nämlich soweit eine gegenseitige Beeinflussung, beispielsweise durch Wärmeübertragung, zwischen dem Abgasrückführstrang und dem Abgasstrang möglich ist, hier also insbesondere diejenigen Leitungsteile des Abgasrückführstrangs, welche im Bereich des NOx-Speicherkatalysators verlaufen.Under a branch for separating a partial exhaust gas flow in the context of the invention those portions of the exhaust line and the Abgasrückführstrangs are to be understood, which divide the undivided exhaust gas stream in the exhaust gas exhaust stream for the exhaust gas recirculation and the exhaust main stream for discharge through the exhaust line. in the According to the invention, in particular the line parts of the exhaust gas recirculation line, which immediately downstream of the actual separation point connect, part of the diversion, namely as far as a mutual influence, for example by heat transfer, between the exhaust gas recirculation train and the exhaust line is possible, so here in particular those parts of the exhaust gas recirculation line, which run in the region of the NOx storage catalytic converter.
Als das Gehäuse des NOx-Speicherkatalysators wird die äußere Begrenzung der Baueinheit gesehen, welche mit der Umgebungsluft in Kontakt ist. Für die konstruktive Umsetzung des vorgenannten Prinzips ist es insbesondere vorteilhaft, wenn die Leitungsteile des Abgasrückführstranges, welche die Abzweigung bilden, einen Ringmantel innerhalb des Gehäuses um den NOx-Speicherkatalysator bilden. Alternativ hierzu ist es auch möglich, dass die Abzweigung durch mehrere umfangsverteilte parallel geschaltete Leitungen in Bezug auf den NOx-Speicherkatalysator gebildet ist, welche innerhalb des Gehäuses angeordnet sind oder dass die Leitungsteile der Abzweigung zumindest eine einzelne den NOx-Speicherkatalysator innerhalb des Gehäuses umwindende Spiralleitung bilden.As the housing of the NOx storage catalyst, the outer boundary of the assembly is seen, which is in contact with the ambient air. For the constructive implementation of the aforementioned principle, it is particularly advantageous if the line parts of the exhaust gas recirculation line, which form the branch, form an annular jacket within the housing around the NOx storage catalytic converter. Alternatively, it is also possible that the branch is formed by a plurality of circumferentially distributed lines connected in parallel with respect to the NOx storage catalyst, which are arranged within the housing or in that the conduit parts of the branch at least a single spiral around the NOx storage catalyst inside the housing spiral line form.
Eine kompakte Bauausführung wird insbesondere dann möglich, wenn das Gehäuse des NOx-Speicherkatalysators zylindrisch ist. Zusätzliche Vorteile unter dem gleichen Gesichtspunkt bieten sich dadurch, dass das Gehäuse des NOx-Speicherkatalysators einen vergleichbaren Querschnitt wie das Gehäuse des Rußpartikelfilters, so dass die einen Monolithen des NOx-Speicherkatalysator umgebenden Leitungsteile des Abgasrückführstrangs problemlos innerhalb des Gehäuses des NOx-Speicherkatalysators angeordnet werden können.A compact construction is possible in particular when the housing of the NOx storage catalytic converter is cylindrical. Additional advantages from the same point of view are provided by the fact that the housing of the NOx storage catalyst has a comparable cross-section as the housing of the soot particle filter, so that the conduit parts of the exhaust gas recirculation manifold surrounding a monolith of the NOx storage catalyst can be easily arranged within the housing of the NOx storage catalytic converter ,
Gemäß einer bevorzugten Ausführungsform ist alternativ vorgesehen, dass die Abzweigung in dem Monolithen des NOx-Speicherkatalysators gebildet ist. Der Monolith weist dazu bevorzugt einen unbeschichteten Teilbereich aufweist. Dieser kann als Ausnehmung in den Monolithen geformt sein. Es besteht jedoch auch die Möglichkeit, nur auf die Beschichtung in dem ansonsten unveränderten Teilbereich des Monolithen zu verzichten. Bei dieser Ausführungsform kann auf zusätzliche Leitungsteile außerhalb des Monolithen verzichtet werden, da die Abzweigung direkt in dem Monolithen gebildet ist.According to a preferred embodiment, it is alternatively provided that the branch is formed in the monolith of the NOx storage catalytic converter. The monolith preferably has an uncoated portion for this purpose. This can be shaped as a recess in the monolith. However, it is also possible to dispense only with the coating in the otherwise unchanged part of the monolith. In this embodiment can be dispensed with additional conduit parts outside of the monolith, since the branch is formed directly in the monolith.
Für eine kostengünstige einfache Bauausführung, die gleichzeitig ebenfalls zu einer kompakten Baueinheit führt, ist vorgesehen, dass der NOx-Speicherkatalysator und der Rußpartikelfilter koaxial zueinander angeordnet sind. Dies ermöglicht es, sie ohne zusätzliche Leitungsabschnitte miteinander zu verbinden.For a cost-effective simple construction, which also leads to a compact unit, it is provided that the NOx storage catalyst and the particulate filter are arranged coaxially to each other. This makes it possible to connect them together without additional line sections.
Um eine verbesserte Regeneration des Rußpartikelfilters (DPF) zu ermöglichen, kann unmittelbar vor demselben ein Dieseloxidationskatalysator (DOC) eingesetzt werden, der vorteilhafterweise ebenfalls ohne zusätzliche Leitungsabschnitte mit der vorgenannten Baugruppe zur Abgasnachbehandlung verbunden werden kann.In order to enable an improved regeneration of the soot particle filter (DPF), a diesel oxidation catalyst (DOC) can be used directly in front of it, which advantageously can also be connected to the abovementioned exhaust gas after-treatment module without additional line sections.
Eine Abgasgegendruckklappe kann im Abgasstrang hinter dem NOx-Speicherkatalysator angeordnet sein, die ebenfalls nur auf den Volumenstrom des Abgashauptstromes ausgelegt sein muß. Für den abgezweigten Abgasteilstrom kann im Abgasrückführstrang ein Stell- oder Regelventil, bevorzugt in unmittelbarer Nähe zur obengenannten Baueinheit vorgesehen sein. Die genannten Bauteile lassen sich somit mit der genannten Baugruppe zu einer Gesamteinheit leicht vormontieren.An exhaust gas backpressure flap can be arranged in the exhaust gas line behind the NOx storage catalytic converter, which also has to be designed only for the volume flow of the main exhaust gas flow. For the branched off exhaust gas partial flow can in the exhaust gas recirculation line an adjusting or control valve, preferably be provided in close proximity to the above-mentioned unit. The said components can thus be easily preassembled with said assembly to a total unit.
Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird nachstehend beschrieben.A preferred embodiment of the invention is illustrated in the drawings and will be described below.
- a) in einem Längsteilschnitt;
- b) in einem Querschnitt gemäß der Linie A-A;
- c) in einem Querschnitt gemäß der Linie B-B.
- a) in a longitudinal section;
- b) in a cross section along the line AA;
- c) in a cross section along the line BB.
In
In
In der Darstellung b) wird deutlich, dass im Bereich des Ringmantels
In der Darstellung c) ist der perferierte Trichter als Abgasstromteiler
In
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 1111
- BrennkraftmaschineInternal combustion engine
- 1212
- Luftverteilerair distributor
- 1313
- Abgassammlercollector
- 1414
- LuftansaugstrangLuftansaugstrang
- 1515
- Abgasstrangexhaust gas line
- 1616
- Abgasturboladerturbocharger
- 1717
- Verdichtercompressor
- 1818
- Turbineturbine
- 1919
- LadeluftkühlerIntercooler
- 2020
- Baugruppe/AbgasnachbehandlungAssembly / exhaust aftertreatment
- 2121
- DieseloxidationskatalysatorDiesel oxidation catalyst
- 2222
- Dieselpartikelfilterdiesel particulate Filter
- 2323
- NOx-SpeicherkatalysatorNOx storage catalytic converter
- 2424
- Abgasteilerexhaust divider
- 2525
- Ringmantelring jacket
- 2626
- AbgasrückführstrangExhaust gas return duct Rank
- 2727
- Zweigleitungbranch line
- 2828
- Regelventilcontrol valve
- 2929
- Ringsammlerring collectors
- 3030
- GegendruckklappeBack pressure valve
- 3131
- Hauptleitungmain
- 3232
- Gehäuse des NOx-SpeicherkatalysatorsHousing of the NOx storage catalyst
- 3333
- Monolith des NOx-SpeicherkatalysatorsMonolith of the NOx storage catalyst
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102006054043 A1 [0004] DE 102006054043 A1 [0004]
Claims (10)
Priority Applications (1)
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DE102010025699A DE102010025699A1 (en) | 2010-06-30 | 2010-06-30 | Internal combustion engine i.e. diesel engine, operating method, involves arranging branches for separating partial exhaust gas flow to exhaust gas recirculation in housing of nitrogen oxide-storage catalyst |
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DE102010025699A DE102010025699A1 (en) | 2010-06-30 | 2010-06-30 | Internal combustion engine i.e. diesel engine, operating method, involves arranging branches for separating partial exhaust gas flow to exhaust gas recirculation in housing of nitrogen oxide-storage catalyst |
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Cited By (3)
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DE102014109805A1 (en) | 2014-07-11 | 2016-01-14 | Fev Gmbh | Exhaust gas recirculation system for an internal combustion engine and method for operating such an exhaust gas recirculation system |
CN107816406A (en) * | 2016-09-12 | 2018-03-20 | 福特环球技术公司 | For reducing the method and system of discharge |
EP3650681A1 (en) * | 2018-11-09 | 2020-05-13 | RENAULT s.a.s. | Vertical annular egr cooler with high intake |
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US20070095054A1 (en) * | 2005-11-03 | 2007-05-03 | Goebelbecker Michael S | Dual walled particular filter for transporting filtered exhaust to a compressor of a diesel engine turbocharger |
DE102006054043A1 (en) | 2006-11-16 | 2008-05-21 | Volkswagen Ag | Internal combustion engine with exhaust gas recirculation |
FR2908831A1 (en) * | 2006-11-22 | 2008-05-23 | Renault Sas | ARRANGEMENT FOR THE ASSEMBLY OF AN EXHAUST GAS DERIVATION DRIVE HAVING AN UPPER END FRONT PORTION BY A DEPOLLUTION DEVICE |
FR2930296A1 (en) * | 2008-04-16 | 2009-10-23 | Faurecia Sys Echappement | Exhaust line for engine unit of motor vehicle, has communication opening with heat exchanger and purification unit, where internal section of opening is fifty percentages of that of exchanger perpendicular to gas flow direction |
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US20070095054A1 (en) * | 2005-11-03 | 2007-05-03 | Goebelbecker Michael S | Dual walled particular filter for transporting filtered exhaust to a compressor of a diesel engine turbocharger |
DE102006054043A1 (en) | 2006-11-16 | 2008-05-21 | Volkswagen Ag | Internal combustion engine with exhaust gas recirculation |
FR2908831A1 (en) * | 2006-11-22 | 2008-05-23 | Renault Sas | ARRANGEMENT FOR THE ASSEMBLY OF AN EXHAUST GAS DERIVATION DRIVE HAVING AN UPPER END FRONT PORTION BY A DEPOLLUTION DEVICE |
FR2930296A1 (en) * | 2008-04-16 | 2009-10-23 | Faurecia Sys Echappement | Exhaust line for engine unit of motor vehicle, has communication opening with heat exchanger and purification unit, where internal section of opening is fifty percentages of that of exchanger perpendicular to gas flow direction |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102014109805A1 (en) | 2014-07-11 | 2016-01-14 | Fev Gmbh | Exhaust gas recirculation system for an internal combustion engine and method for operating such an exhaust gas recirculation system |
US10215086B2 (en) | 2014-07-11 | 2019-02-26 | FEV Europe GmbH | Exhaust gas recirculation system for an internal combustion engine and method for operating such an exhaust gas recirculation system |
CN107816406A (en) * | 2016-09-12 | 2018-03-20 | 福特环球技术公司 | For reducing the method and system of discharge |
CN107816406B (en) * | 2016-09-12 | 2021-10-01 | 福特环球技术公司 | Method and system for reducing emissions |
EP3650681A1 (en) * | 2018-11-09 | 2020-05-13 | RENAULT s.a.s. | Vertical annular egr cooler with high intake |
FR3088380A1 (en) * | 2018-11-09 | 2020-05-15 | Renault S.A.S. | VERTICAL ANNULAR EGR COOLER WITH HIGH INPUT |
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