EP1621755A2 - Clean low pressure exhaust gas recirculation - Google Patents

Clean low pressure exhaust gas recirculation Download PDF

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Publication number
EP1621755A2
EP1621755A2 EP05013558A EP05013558A EP1621755A2 EP 1621755 A2 EP1621755 A2 EP 1621755A2 EP 05013558 A EP05013558 A EP 05013558A EP 05013558 A EP05013558 A EP 05013558A EP 1621755 A2 EP1621755 A2 EP 1621755A2
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EP
European Patent Office
Prior art keywords
exhaust gas
internal combustion
combustion engine
gas recirculation
particulate filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05013558A
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German (de)
French (fr)
Other versions
EP1621755A3 (en
Inventor
Hans-Jürgen Brüne
Gerhard Kemethofer
Franz Drexler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication date
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Publication of EP1621755A2 publication Critical patent/EP1621755A2/en
Publication of EP1621755A3 publication Critical patent/EP1621755A3/en
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F02B29/0437—Liquid cooled heat exchangers
    • 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
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • 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
    • F02M26/16—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 with EGR valves located at or near the connection to the exhaust system
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers

Definitions

  • the present invention relates to an internal combustion engine in which exhaust gases are formed, which are partially recycled into the combustion chamber.
  • Such an internal combustion engine is known for example from DE 42 40 239 A1.
  • the exhaust gases are first used to drive a compressor, a turbocharger, to compress the combustion air. After that, the exhaust gases are passed through a particle filter. The so purified exhaust gases can be re-forwarded to the combustion process after cooling.
  • the volume flow of the recirculated exhaust gas is adjusted by a throttle body, after the particulate filter.
  • this internal combustion engine is comparatively inefficient and additionally has the disadvantage that sulfur, which is often present in the fuel, accumulates through the exhaust gas recirculation.
  • the internal combustion engine to a turbine which is driven by the exhaust gases of the internal combustion engine and which is used for compression of the internal combustion engine supplied air and the recirculated exhaust gases.
  • Such turbines / compressors are known as so-called turbochargers according to the prior art.
  • the internal combustion engine according to the invention has a particle filter in which soot particles which are formed, for example, during the combustion of diesel fuel, are separated as completely as possible from the exhaust gas. With the particulate filter or with a separate unit and the sulfur is removed from the exhaust gases.
  • the internal combustion engine has an exhaust gas recirculation, which is arranged between the outlet of the particulate filter and the suction side of the turbine. The exhaust gases to be supplied are therefore sucked out of the main exhaust gas line after the particle filter and fed to the fresh air, which also rests on the suction side of the compressor.
  • a cooler is arranged in the exhaust gas recirculation, so that the recirculated exhaust gas is already pre-cooled, mixed with the air and thus compressed in the compressor.
  • This embodiment of the present invention has the advantage that the air / exhaust gas mixture can be fed to the combustion process at a higher pressure.
  • a control element is arranged after the particulate filter that regulates the recirculated exhaust gas volume flow, for example, depending on the engine power.
  • the air / exhaust gas mixture after it has been compressed by the turbocharger and before it flows into the combustion chamber of the internal combustion engine cooled by a charge air cooler.
  • This embodiment of the present invention has the advantage that the mass of the mixture to be introduced into the combustion chamber can be increased.
  • FIG. 1 shows the internal combustion engine according to the invention, which in the present case has six combustion chambers 11, cylinders, in which a fuel-air mixture, preferably a diesel-air mixture, is burnt.
  • the burned gases are collected in the manifolds 17 and, as indicated by arrow 12, supplied to a turbine 2 which propels and relaxes them.
  • the so-relaxed exhaust gases are, as symbolized by arrow 21, a particle filter 3, which also has a sulfur trap supplied.
  • the particle filter 3 has an inlet 5 and an outlet 6, from which the exhaust gases after their purification flow out as far as possible free of particles and sulfur.
  • a closable by a flap 9 branch is arranged, can be recycled by the exhaust gases in the combustion chamber.
  • the exhaust gas After the exhaust gas has passed through the flap 9, it flows out of the exhaust, as shown by arrow 20. Through the pipe 4, the so-called exhaust gas recirculation is realized.
  • part of the exhaust gas first flows once through a low-pressure cooler 8, for example a heat exchanger, in which the recirculated exhaust gases are cooled by the cooling medium 14.
  • the thus cooled exhaust gas is passed to the suction side 7 of the compressor of the turbocharger and mixed there with fresh air 13 and compressed in the turbocharger 2.
  • the thus compressed gas is cooled once again in a charge air cooler 10, by means of the heat exchange medium 15, before it via a flap 16, with the air / exhaust gas mixture stream, which is provided via the manifold 19 to the combustion chambers 11 each available can.
  • the internal combustion engine according to the invention has the advantage that the exhaust gas can flow to the particle filter without a further pressure loss in the environment.
  • the recirculated gas is particle-free and in particular free of sulfur.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

The engine includes a turbocharger (2), a particulate filter (3) and an exhaust gas recirculation system (4). The particulate filter is provided with a sulfur trap. The exhaust gas recirculation system is arranged between the outlet (6) of the particulate filter and the suction side (7) of the turbocharger.

Description

Die vorliegende Erfindung betrifft eine Verbrennungskraftmaschine, bei der Abgase entstehen, die teilweise in den Brennraum rückgeführt werden.The present invention relates to an internal combustion engine in which exhaust gases are formed, which are partially recycled into the combustion chamber.

Eine derartige Verbrennungsmaschine ist beispielsweise aus der DE 42 40 239 A1 bekannt. Bei dieser Verbrennungsmaschine werden die Abgase zunächst zum Antrieb eines Verdichters, eines Turboladers, genutzt, um die Verbrennungsluft zu verdichten. Danach werden die Abgase über einen Partikelfilter geleitet. Die so gereinigten Abgase können nach einer Kühlung direkt dem Verbrennungsprozess erneut-zugeleitet werden. Der Volumenstrom des rückgeleiteten Abgases wird durch ein Drosselorgan, nach dem Partikelfilter eingestellt. Diese Verbrennungsmaschine ist jedoch vergleichsweise ineffizient und hat zusätzlich den Nachteil, dass sich Schwefel, der oftmals in dem Kraftstoff vorhanden ist, durch die Abgasrückführung anreichert.Such an internal combustion engine is known for example from DE 42 40 239 A1. In this internal combustion engine, the exhaust gases are first used to drive a compressor, a turbocharger, to compress the combustion air. After that, the exhaust gases are passed through a particle filter. The so purified exhaust gases can be re-forwarded to the combustion process after cooling. The volume flow of the recirculated exhaust gas is adjusted by a throttle body, after the particulate filter. However, this internal combustion engine is comparatively inefficient and additionally has the disadvantage that sulfur, which is often present in the fuel, accumulates through the exhaust gas recirculation.

Es war deshalb die Aufgabe der vorliegenden Erfindung, eine Verbrennungskraftmaschine zur Verfügung zu stellen, die die Nachteile des Standes der Technik nicht aufweist.It was therefore the object of the present invention to provide an internal combustion engine which does not have the disadvantages of the prior art.

Gelöst wird die Aufgabe durch eine Verbrennungskraftmaschine gemäß Patentanspruch 1. Bevorzugte Ausführungsform der erfindungsgemäßen Verbrennungskraftmaschinen sind in den Unteransprüchen 2 - 5 beansprucht.The object is achieved by an internal combustion engine according to claim 1. Preferred embodiment of the internal combustion engines according to the invention are claimed in the dependent claims 2-5.

Es war für den Fachmann überaus erstaunlich und nicht zu erwarten, dass das Temperaturniveau des Abgases in der Abgasrückführung insgesamt abgesenkt werden konnte. Des weiteren ist vorteilhaft, dass der gesamte Abgasstrom durch die Turbine geleitet wird und dass das Abgas in dem Partikelfilter von Partikeln frei und somit sauber zur Frischluftseite der Turbine geführt wird. In die Abgasleitung muss kein Drosselorgan eingebaut werden, so dass das Abgas ungedrosselt in die Umgebung abströmen kann, was zusätzlich die Motorleistung erhöht. Mit dem erfindungsgemäßen Motor ist eine deutliche NO x - Reduzierung bei gleichem Partikelniveau im Abgas erzielbar. Das Kraftstoffverbrauchsreduktionspotenzial der erfindungsgemäßen Verbrennungskraftmaschine liegt zwischen 2 % und 3 %. Die Turbine weist bei geringen Drehzahlen ein verbessertes Ansprechverhalten auf. Es reichert sich kein Schwefel in dem Verbrennungsprozess an.It was extremely surprising for the skilled person and not expected that the temperature level of the exhaust gas in the exhaust gas recirculation could be lowered overall. Furthermore, it is advantageous that the entire exhaust gas flow is passed through the turbine and that the exhaust gas is guided in the particle filter of particles freely and thus clean to the fresh air side of the turbine. In the exhaust pipe, no throttle body must be installed so that the exhaust gas can flow unrestricted into the environment, which also increases engine performance. With the engine according to the invention, a clear NO x reduction at the same particle level in the exhaust gas can be achieved. The fuel consumption reduction potential of the internal combustion engine according to the invention is between 2% and 3%. The Turbine has an improved response at low speeds. Sulfur does not accumulate in the combustion process.

Erfindungsgemäß weist die Verbrennungskraftmaschine eine Turbine auf, die von den Abgasen der Verbrennungskraftmaschine angetrieben wird und die zur Verdichtung der der Verbrennungskraftmaschine zugeführten Luft bzw. der rückgeführten Abgase eingesetzt wird. Solche Turbinen/Verdichter sind als so genannte Turbolader nach dem Stand der Technik bekannt. Des weiteren weist die erfindungsgemäße Verbrennungskraftmaschine einen Partikelfilter auf, in dem Rußpartikel, die beispielsweise bei der Verbrennung von Dieselkraftstoff entstehen, möglichst vollständig aus dem Abgas abgeschieden werden. Mit dem Partikelfilter oder mit einer separaten Einheit wird auch der Schwefel aus den Abgasen entfernt. Weiterhin erfindungsgemäß verfügt die Verbrennungskraftmaschine über eine Abgasrückführung, die zwischen dem Auslass des Partikelfilters und der Saugseite der Turbine angeordnet ist. Die zuzuführenden Abgase werden demnach nach dem Partikelfilter aus der Hauptabgasleitung abgesaugt und der Frischluft, die ebenfalls an der Saugseite des Verdichters anliegt, zugeführt.According to the invention, the internal combustion engine to a turbine which is driven by the exhaust gases of the internal combustion engine and which is used for compression of the internal combustion engine supplied air and the recirculated exhaust gases. Such turbines / compressors are known as so-called turbochargers according to the prior art. Furthermore, the internal combustion engine according to the invention has a particle filter in which soot particles which are formed, for example, during the combustion of diesel fuel, are separated as completely as possible from the exhaust gas. With the particulate filter or with a separate unit and the sulfur is removed from the exhaust gases. Furthermore, according to the invention, the internal combustion engine has an exhaust gas recirculation, which is arranged between the outlet of the particulate filter and the suction side of the turbine. The exhaust gases to be supplied are therefore sucked out of the main exhaust gas line after the particle filter and fed to the fresh air, which also rests on the suction side of the compressor.

Vorzugsweise ist in der Abgasrückführung ein Kühler angeordnet, so dass das rückgeführte Abgas bereits vorgekühlt, mit der Luft gemischt und so in dem Verdichter verdichtet wird. Diese Ausführungsform der vorliegenden Erfindung hat den Vorteil, dass das Luft/Abgasgemisch, höher verdichtet dem Verbrennungsprozess zugeführt werden kann.Preferably, a cooler is arranged in the exhaust gas recirculation, so that the recirculated exhaust gas is already pre-cooled, mixed with the air and thus compressed in the compressor. This embodiment of the present invention has the advantage that the air / exhaust gas mixture can be fed to the combustion process at a higher pressure.

Weiterhin bevorzugt ist nach dem Partikelfilter ein Regelorgan angeordnet, dass den rückgeführten Abgasvolumenstrom beispielsweise in Abhängigkeit der Motorleistung regelt.Further preferably, a control element is arranged after the particulate filter that regulates the recirculated exhaust gas volume flow, for example, depending on the engine power.

Weiterhin bevorzugt wird das Luft-/Abgasgemisch, nachdem es von dem Turbolader verdichtet worden ist und bevor es in den Brennraum der Verbrennungskraftmaschine einströmt durch einen Ladeluftkühler abgekühlt. Diese Ausführungsform der vorliegenden Erfindung hat den Vorteil, dass die Masse des in den Brennraum einzuleitenden Gemisches, erhöht werden kann.Further preferably, the air / exhaust gas mixture, after it has been compressed by the turbocharger and before it flows into the combustion chamber of the internal combustion engine cooled by a charge air cooler. This embodiment of the present invention has the advantage that the mass of the mixture to be introduced into the combustion chamber can be increased.

Im Folgenden wird die Erfindung anhand Figur 1 erläutert. Diese Erläuterungen sind lediglich beispielhaft und schränken den allgemeinen Erfindungsgedanken nicht ein.In the following the invention will be explained with reference to FIG. These explanations are merely exemplary and do not limit the general inventive concept.

Figur 1 zeigt die erfindungsgemäße Verbrennungskraftmaschine, die in dem vorliegenden Fall sechs Brennräume 11, Zylinder, aufweist, in denen ein Kraftstoffluftgemisch, vorzugsweise ein Dieselluftgemisch verbrannt wird. Die verbrannten Gase werden in den Krümmern 17 gesammelt und wie durch Pfeil 12 dargestellt, einer Turbine 2 zugeführt, die sie antreiben und in der sie entspannt werden. Die so entspannten Abgase werden, wie durch Pfeil 21 symbolisiert, einem Partikelfilter 3, der gleichzeitig eine Schwefelfalle aufweist, zugeführt. Der Partikelfilter 3 weist einen Einlass 5 und einen Auslass 6 auf, aus dem die Abgase nach deren Reinigung weitestgehend partikel- und schwefelfrei herausströmen. In der Abgasleitung 22 ist eine, durch eine Klappe 9 schließbare Abzweigung angeordnet, durch die Abgase in den Verbrennungsraum rückgeführt werden können. Nachdem das Abgas die Klappe 9 durchströmt hat, strömt es wie durch Pfeil 20 dargestellt, aus dem Auspuff heraus. Durch die Rohrleitung 4 wird die sogenannte Abgasrückführung realisiert. Dafür strömt ein Teil des Abgases zunächst einmal über einen Niederdruckkühler 8, beispielsweise einem Wärmetauscher, in dem die rückgeführten Abgase durch das Kühlmedium 14 abgekühlt werden. Das so gekühlte Abgas wird auf die Saugseite 7 des Verdichters des Turboladers geleitet und dort mit Frischluft 13 vermischt und in dem Turbolader 2 verdichtet. Das so verdichtete Gas wird noch einmal in einem Ladeluftkühler 10, mittels des Wärmetauschermediums 15 abgekühlt, bevor es über eine Klappe 16, mit dem der Luft/Abgasgemisch-Strom, der über den Verteiler 19 den Brennräumen 11 jeweils zur Verfügung gestellt wird, geregelt werden kann.FIG. 1 shows the internal combustion engine according to the invention, which in the present case has six combustion chambers 11, cylinders, in which a fuel-air mixture, preferably a diesel-air mixture, is burnt. The burned gases are collected in the manifolds 17 and, as indicated by arrow 12, supplied to a turbine 2 which propels and relaxes them. The so-relaxed exhaust gases are, as symbolized by arrow 21, a particle filter 3, which also has a sulfur trap supplied. The particle filter 3 has an inlet 5 and an outlet 6, from which the exhaust gases after their purification flow out as far as possible free of particles and sulfur. In the exhaust pipe 22 a closable by a flap 9 branch is arranged, can be recycled by the exhaust gases in the combustion chamber. After the exhaust gas has passed through the flap 9, it flows out of the exhaust, as shown by arrow 20. Through the pipe 4, the so-called exhaust gas recirculation is realized. For this purpose, part of the exhaust gas first flows once through a low-pressure cooler 8, for example a heat exchanger, in which the recirculated exhaust gases are cooled by the cooling medium 14. The thus cooled exhaust gas is passed to the suction side 7 of the compressor of the turbocharger and mixed there with fresh air 13 and compressed in the turbocharger 2. The thus compressed gas is cooled once again in a charge air cooler 10, by means of the heat exchange medium 15, before it via a flap 16, with the air / exhaust gas mixture stream, which is provided via the manifold 19 to the combustion chambers 11 each available can.

Die erfindungsgemäße Verbrennungskraftmaschine hat den Vorteil, dass das Abgas nach dem Partikelfilter ohne einen weiteren Druckverlust in die Umgebung strömen kann. Das rückgeführte Gas ist partikel- und insbesondere schwefelfrei.The internal combustion engine according to the invention has the advantage that the exhaust gas can flow to the particle filter without a further pressure loss in the environment. The recirculated gas is particle-free and in particular free of sulfur.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
VerbrennungskraftmaschineInternal combustion engine
22
Turbine (Turbolader)Turbine (turbocharger)
33
Partikelfilter und SchwefelfalleParticle filter and sulfur trap
44
AbgasrückführleitungExhaust gas recirculation line
55
Einlass des PartikelfiltersInlet of the particulate filter
66
Auslass des PartikelfiltersOutlet of the particulate filter
77
Saugseite des Verdichters (Turboladers)Suction side of the compressor (turbocharger)
88th
NiederdruckrückführkühlerLow pressure recirculation cooler
99
Klappeflap
1010
LadeluftkühlerIntercooler
1111
Brennraumcombustion chamber
1212
Strömungsrichtung des AbgasesFlow direction of the exhaust gas
1313
Strömungsrichtung der FrischluftFlow direction of the fresh air
1414
Kühlmedium des KühlersCooling medium of the radiator
1515
Kühlmedium des LadeluftkühlersCooling medium of the intercooler
1616
Klappeflap
1717
AbgassammelleitungExhaust manifold
1818
Strömungsrichtung des verdichteten Frischluft/AbgasgemischesFlow direction of the compressed fresh air / exhaust gas mixture
1919
Verteiler des Frischluft/Abgasgemisches auf die BrennräumeDistributor of the fresh air / exhaust gas mixture to the combustion chambers
2020
Strömungsrichtung des Abgases nach dem PartikelfilterFlow direction of the exhaust gas after the particle filter
2121
Strömungsrichtung durch die Turbine entspannten AbgasesFlow direction through the turbine expanded exhaust gas
2222
Rohrleitung nach dem PartikelfilterPipeline after the particle filter

Claims (5)

Verbrennungskraftmaschine (1), bei der Abgase entstehen, mit einem Turbolader (2), einem Partikelfilter (3), und mit einer Abgasrückführung (4), dadurch gekennzeichnet, dass der Partikelfilter mit einer Schwefelfalle ausgestattet ist.Internal combustion engine (1), in which exhaust gases are formed, with a turbocharger (2), a particulate filter (3), and with an exhaust gas recirculation system (4), characterized in that the particulate filter is equipped with a sulfur trap. Verbrennungskraftmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Abgasrückführung zwischen dem Auslass (6) des Partikelfilters (3) und der Saugseite (7) der Turbolader (2) angeordnet ist.Internal combustion engine according to claim 1, characterized in that the exhaust gas recirculation between the outlet (6) of the particulate filter (3) and the suction side (7) of the turbocharger (2) is arranged. Verbrennungskraftmaschine nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass in der Abgasrückführung (4) ein Kühler (8) angeordnet ist.Internal combustion engine according to one of the preceding claims, characterized in that in the exhaust gas recirculation (4), a radiator (8) is arranged. Verbrennungskraftmaschine nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass nach dem Partikelfilter ein Regelorgan (9) angeordnet ist, mit dem der rückgeführte Abgasvolumenstrom regelbar ist.Internal combustion engine according to one of the preceding claims, characterized in that after the particulate filter, a control element (9) is arranged, with which the recirculated exhaust gas volume flow is controllable. Verbrennungskraftmaschine nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass zwischen dem Turbolader (2) und der Verbrennungskraftmaschine ein Ladeluftkühler (10) angeordnet ist.Internal combustion engine according to one of the preceding claims, characterized in that between the turbocharger (2) and the internal combustion engine, a charge air cooler (10) is arranged.
EP05013558A 2004-07-28 2005-06-23 Clean low pressure exhaust gas recirculation Withdrawn EP1621755A3 (en)

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Application Number Priority Date Filing Date Title
DE102004036562A DE102004036562A1 (en) 2004-07-28 2004-07-28 Clean low pressure exhaust gas recirculation

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EP1621755A2 true EP1621755A2 (en) 2006-02-01
EP1621755A3 EP1621755A3 (en) 2010-05-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1936175A1 (en) 2006-12-21 2008-06-25 Magneti Marelli Sistemi di Scarico S.p.a. An exhaust system for an internal combustion engine provided with an exhaust gas recirculation circuit
EP1812705B1 (en) * 2004-11-19 2008-10-01 Bayerische Motorenwerke Aktiengesellschaft Vehicle with a turbocharged diesel engine and exhaust recycling

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4240239A1 (en) 1992-12-01 1994-06-09 Wolfgang Schmitz Turbo-charged combustion engine with bypass valve serving intake air-cooler - allows cooling of recirculated combustion prods. or of fresh air for combustion purposes according to engine load.

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EP1936175A1 (en) 2006-12-21 2008-06-25 Magneti Marelli Sistemi di Scarico S.p.a. An exhaust system for an internal combustion engine provided with an exhaust gas recirculation circuit

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DE102004036562A1 (en) 2006-03-23

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