DE19946637A1 - Device to reduce soot deposits in exhaust passage of diesel engine has inner pipe with vibration capabilities installed in exhaust passage at least in areas, and located downstream of catalyser - Google Patents

Device to reduce soot deposits in exhaust passage of diesel engine has inner pipe with vibration capabilities installed in exhaust passage at least in areas, and located downstream of catalyser

Info

Publication number
DE19946637A1
DE19946637A1 DE19946637A DE19946637A DE19946637A1 DE 19946637 A1 DE19946637 A1 DE 19946637A1 DE 19946637 A DE19946637 A DE 19946637A DE 19946637 A DE19946637 A DE 19946637A DE 19946637 A1 DE19946637 A1 DE 19946637A1
Authority
DE
Germany
Prior art keywords
exhaust passage
inner tube
inner pipe
areas
catalyser
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Withdrawn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
DE19946637A
Other languages
German (de)
Inventor
Werner Engeler
Olaf Bechmann
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.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Priority to DE19946637A priority Critical patent/DE19946637A1/en
Publication of DE19946637A1 publication Critical patent/DE19946637A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F01N13/16—Selection of particular materials
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/20—Silencing apparatus characterised by method of silencing by using movable parts having oscillating or vibrating movement
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/22—Silencing apparatus characterised by method of silencing by using movable parts the parts being resilient walls
    • 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
    • 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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

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

Abstract

An inner pipe(20) with vibration capabilities is installed in the exhaust passage(12) at least in areas. The inner pipe is installed downstream of the catalyser(14). The inner pipe may be made of sheet metal, high temperature resistant plastic, or a combination of these materials. Means of generating vibrations are located inside the inner pipe.

Description

Die Erfindung betrifft eine Anordnung zur Minderung von Rußablagerungen in einem Abgaskanal einer Verbrennungskraftmaschine, insbesondere einer Dieselbrenn­ kraftmaschine.The invention relates to an arrangement for reducing soot deposits in one Exhaust gas duct of an internal combustion engine, in particular a diesel burner engine.

Bei einer Verbrennung von Luft-Kraftstoff-Gemischen in gängigen Verbrennungskraftmaschinen entstehen in unterschiedlichen Anteilen Schadstoffe. Gasförmige Schadstoffkomponenten, wie beispielsweise Kohlenmonoxid oder Stickoxide, können durch in einem Abgaskanal der Verbrennungskraftmaschine angeordnete Katalysatoren in weniger umweltrelevante Produkte umgesetzt werden. Daneben kommt es jedoch auch in Abhängigkeit von einem Betriebsmodus der Verbrennungskraftmaschine zur Bildung von makroskopischen Partikeln, insbesondere Rußpartikeln.When burning air-fuel mixtures in common Internal combustion engines produce pollutants in different proportions. Gaseous pollutant components, such as carbon monoxide or nitrogen oxides, can be arranged in an exhaust duct of the internal combustion engine Catalysts are implemented in less environmentally relevant products. Besides, it happens however, also depending on an operating mode of the internal combustion engine Formation of macroscopic particles, especially soot particles.

Die Rußpartikel können sich im Bereich des Abgaskanals, insbesondere an den Wandungen desselben, ablagern. Findet diese Ablagerung im Bereich der Katalysatoren statt, so kann allmählich deren Funktionalität eingeschränkt werden. Es ist daher bekannt, in regelmäßigen Abständen durch Oxidation der Rußpartikel diese störende Schicht zu entfernen. Dazu kann beispielsweise eine Abgastemperatur erhöht werden, oder es werden dem zu verbrennenden Luft-Kraftstoff-Gemisch Additive zugesetzt, die eine Zündtemperatur der Rußpartikel herabsetzen. Durch derartige Maßnahmen lassen sich allerdings nur der Verbrennungskraftmaschine relativ nah angeordnete Bereiche des Abgaskanals wirkungsvoll von Rußablagerungen befreien. In weiter stromab liegenden Bereichen des Abgaskanals wird damit stetig eine Rußpartikelschicht durch Ablagerungen erhöht. Dies kann dazu führen, daß eine Schalldämpfung nicht mehr optimal gewährleistet werden kann. So ist bekannt, daß bei Relaxationsschalldämpfern eine Änderung von zusätzlich in dem Abgaskanal angeordneten Volumina, die als Strömungswiderstände dienen, zu einer Änderung eines Schallabsorptionsgrades führt. Ferner treten häufig infolge eines Beschleunigungsvorgangs Rußstöße auf Aufgabe der vorliegenden Erfindung ist es daher, in einfacher Weise eine Rußablagerung im Abgaskanal von Verbrennungskraftmaschinen, insbesondere Dieselbrennkraftmaschinen, zu verhindern.The soot particles can accumulate in the area of the exhaust duct, particularly on the walls the same, deposit. If this deposition takes place in the area of the catalysts, it can gradually reduce their functionality. It is therefore known to be regular Intervals by oxidation of the soot particles to remove this disruptive layer. This can For example, an exhaust gas temperature can be increased, or it will burning air-fuel mixture additives are added that have an ignition temperature of Reduce soot particles. With such measures, however, only the Internal combustion engine relatively closely located areas of the exhaust duct effectively remove soot deposits. In further downstream areas of the Exhaust gas channel is continuously increased by a layer of soot particles through deposits. This can lead to the fact that sound absorption can no longer be optimally guaranteed. It is known, for example, that relaxation mufflers have a change in additional Exhaust duct arranged volumes that serve as flow resistances to a Change in a sound absorption level leads. Furthermore, often occur as a result of Accelerating soot bursts  The object of the present invention is therefore to deposit soot in a simple manner Exhaust gas duct from internal combustion engines, in particular diesel internal combustion engines prevent.

Erfindungsgemäß wird diese Aufgabe durch die Anordnung zur Minderung von Rußablagerungen in dem Abgaskanal mit den Merkmalen des Anspruchs 1 gelöst. Dadurch, daß in dem Abgaskanal zumindest bereichsweise ein schwingungsfähiges Innenrohr angeordnet ist, können die während des Betriebs der Verbrennungskraftmaschine auftretenden Vibrationen des Innenrohrs die Rußablagerung verhindern.According to the invention, this object is achieved by the arrangement for reducing Soot deposits in the exhaust duct solved with the features of claim 1. Thereby, that in the exhaust duct, at least in some areas, a vibratable inner tube is arranged, can during the operation of the internal combustion engine Vibrations of the inner tube that occur prevent soot deposition.

In bevorzugter Weise ist das Innenrohr stromab des Katalysators in dem Abgaskanal angeordnet und zwar derart, daß es möglichst einfach in Schwingung versetzt werden kann. Dies kann zum einen passiv erfolgen durch das den Abgaskanal durchströmende Abgas. Denkbar ist aber auch, dem Innenrohr Mittel zur Erzeugung der Vibration, beispielsweise Rüttler, zuzuordnen.The inner tube is preferably downstream of the catalyst in the exhaust duct arranged and in such a way that it can be set in vibration as easily as possible. On the one hand, this can be done passively by the exhaust gas flowing through the exhaust gas duct. It is also conceivable, for example, for the inner tube to generate the vibration Vibrators to assign.

Das Innenrohr kann sich in bevorzugter Weise auch über Bauelemente erstrecken, die zur Schalldämpfung in dem Abgaskanal integriert sind. So kann der Verlauf des Innenrohrs einem Verlauf von zusätzlich in den Kanal eingebrachten Volumina folgen. Die Auslegung des dann als Schalldämpfer wirkenden Abgaskanals und damit die erzielbare Schallabsorption orientiert sich in diesem Falle an dem Innendurchmesser des Innenrohrs und kann in bekannter Weise angepaßt werden.The inner tube can preferably also extend over components that are used for Sound attenuation are integrated in the exhaust duct. So the course of the inner tube follow a course of additional volumes introduced into the channel. The interpretation of the exhaust duct, which then acts as a silencer, and thus the achievable In this case, sound absorption is based on the inner diameter of the inner tube and can be adjusted in a known manner.

Nach der Erfindung besteht das Innenrohr aus Metallblech, hochtemperaturbeständigem Kunststoff oder einer Kombination derartiger Werkstoffe. Soll die Erzeugung von Vibrationen passiv erfolgen, so muß das Material nach Möglichkeit elastische Eigenschaften haben, um es ohne großen Aufwand in Vibrationen zu versetzen. Dazu eignen sich beispielsweise hochtemperaturbeständige Elastomere.According to the invention, the inner tube is made of sheet metal, high temperature resistant Plastic or a combination of such materials. Shall generate vibrations passively, the material must have elastic properties if possible in order to to vibrate it with little effort. For example, are suitable high temperature resistant elastomers.

Weitere bevorzugte Ausgestaltungen der Erfindung ergeben sich aus den übrigen, in den Unteransprüchen genannten Merkmalen. Die Erfindung wird nachfolgend in einem Ausführungsbeispiel anhand der zugehörigen Zeichnung, die eine Schnittansicht durch einen Abgaskanal mit einer Anordnung zur Minderung von Rußablagerungen zeigt, näher erläutert. Further preferred refinements of the invention result from the others in the Characteristics mentioned subclaims. The invention is described in an exemplary embodiment based on the associated Drawing showing a sectional view through an exhaust duct with an arrangement for Reduction of soot deposits shows, explained in more detail.  

In der Figur ist eine Anordnung 10 eines Abgaskanals 12 mit verschiedenen zusätzlichen Funktionselementen dargestellt. Das Abgas der Verbrennungskraftmaschine, insbesondere der Dieselbrennkraftmaschine, trifft zunächst auf einen Katalysator 14 (abgasreinigendes Funktionselement). Innerhalb des Katalysators 14 erfolgt in bekannter Weise eine Umsetzung von gasförmigen Schadstoffkomponenten des Abgases. Je nach Beschaffenheit des Katalysators 14 kann dessen Porosität variieren. Und so ist es möglich, daß Rußpartikel unbeschadet den Katalysator 14 durchströmen können und sich in einem Bereich 16 stromab des Katalysators 14 ablagern können.In the figure, an arrangement 10 of an exhaust duct 12 with various additional functional elements is shown. The exhaust gas from the internal combustion engine, in particular the diesel internal combustion engine, first encounters a catalytic converter 14 (exhaust gas-cleaning functional element). Within the catalyst 14 , gaseous pollutant components of the exhaust gas are converted in a known manner. Depending on the nature of the catalyst 14 , its porosity can vary. And so it is possible that soot particles can flow through the catalyst 14 undamaged and can be deposited in an area 16 downstream of the catalyst 14 .

Neben dem abgasreinigenden Funktionselement weist die Anordnung 10 doch Elemente auf, die zur Schalldämpfung geeignet sind. So sind insgesamt zwei zusätzliche Volumina 18 in dem hinteren Bereich des Abgaskanals 12 integriert. Mit Hilfe dieser beiden Volumina 18 kann in bekannter Weise eine Schallabsorption stattfinden (Relaxationsschalldämpfung).In addition to the exhaust-gas-purifying functional element, the arrangement 10 nevertheless has elements which are suitable for soundproofing. A total of two additional volumes 18 are integrated in the rear area of the exhaust duct 12 . With the help of these two volumes 18 , sound absorption can take place in a known manner (relaxation sound attenuation).

Zur Minderung von Rußablagerungen befindet sich in dem Abgaskanal 12 ein Innenrohr 20. Das Innenrohr 20 ist von den Wandungen 22 des Abgaskanals 12 nach einem vorgegebenen Maß beabstandet, so daß es während der Vibration des Innenrohrs 20 nicht zu einer Berührung mit der Wandung 22 kommt. Aus Gründen der Übersichtlichkeit ist auf eine Darstellung von in vielfältiger Weise verwirklichbaren Positionierelementen (zum Beispiel Halterungsringe) für das Innenrohr 20 verzichtet worden.An inner tube 20 is located in the exhaust duct 12 to reduce soot deposits. The inner tube 20 is spaced apart from the walls 22 of the exhaust gas duct 12 to a predetermined extent, so that there is no contact with the wall 22 during the vibration of the inner tube 20 . For reasons of clarity, positioning elements (for example mounting rings) for the inner tube 20 which can be implemented in a variety of ways have been omitted.

Das Innenrohr 20 besteht gemäß dem Ausführungsbeispiel aus einem hochtemperaturbeständigen elastomeren Kunststoff. Während eines Betriebs der Ver­ brennungskraftmaschine erfolgt eine Vibrationsanregung durch die Abgaspulsation, also passiv. Denkbar ist aber auch, zusätzlich dem Innenrohr Mittel zur Erzeugung der Vibration zuzuordnen, wie beispielsweise einen Rüttler.According to the exemplary embodiment, the inner tube 20 consists of a high-temperature-resistant elastomeric plastic. During operation of the internal combustion engine, vibrations are excited by the exhaust gas pulsation, that is to say passively. However, it is also conceivable to additionally assign means for generating the vibration, such as a vibrator, to the inner tube.

Eine Materialauswahl für das Innenrohr 20 ist nur insoweit beschränkt, als daß eine genügende Temperaturbeständigkeit sowie mechanische Stabilität gewährleistet ist. So kann beispielsweise das Innenrohr auch aus Metallblech, Kunststoffen wie Teflon oder einer Kombination derartiger Werkstoffe geformt sein.A selection of materials for the inner tube 20 is only limited to the extent that sufficient temperature resistance and mechanical stability is ensured. For example, the inner tube can also be formed from sheet metal, plastics such as Teflon or a combination of such materials.

Claims (4)

1. Anordnung zur Minderung von Rußablagerungen in einem Abgaskanal einer Ver­ brennungskraftmaschine, insbesondere einer Dieselbrennkraftmaschine, dadurch gekennzeichnet, daß in dem Abgaskanal zumindest bereichsweise ein schwingungsfähiges Innenrohr ange­ ordnet ist.1. Arrangement for reducing soot deposits in an exhaust duct of an internal combustion engine, in particular a diesel internal combustion engine, characterized in that an oscillatory inner tube is at least partially arranged in the exhaust duct. 2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß das Innenrohr stromab eines Katalysators in dem Abgaskanal angeordnet ist.2. Arrangement according to claim 1, characterized in that the inner tube is arranged downstream of a catalyst in the exhaust duct. 3. Anordnung nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß das Innenrohr aus Metallblech, hochtemperaturbeständigem Kunststoff oder einer Kombination derartiger Werkstoffe besteht.3. Arrangement according to claims 1 or 2, characterized in that the inner tube made of sheet metal, high temperature resistant plastic or one Combination of such materials. 4. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß dem Innenrohr Mittel zur Erzeugung einer Vibration zugeordnet sind.4. Arrangement according to one of the preceding claims, characterized in that means for generating a vibration are assigned to the inner tube.
DE19946637A 1999-09-29 1999-09-29 Device to reduce soot deposits in exhaust passage of diesel engine has inner pipe with vibration capabilities installed in exhaust passage at least in areas, and located downstream of catalyser Withdrawn DE19946637A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19946637A DE19946637A1 (en) 1999-09-29 1999-09-29 Device to reduce soot deposits in exhaust passage of diesel engine has inner pipe with vibration capabilities installed in exhaust passage at least in areas, and located downstream of catalyser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19946637A DE19946637A1 (en) 1999-09-29 1999-09-29 Device to reduce soot deposits in exhaust passage of diesel engine has inner pipe with vibration capabilities installed in exhaust passage at least in areas, and located downstream of catalyser

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DE19946637A1 true DE19946637A1 (en) 2001-04-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010034250A1 (en) * 2010-08-13 2012-02-16 Emitec Gesellschaft Für Emissionstechnologie Mbh Holder for at least one electrode in an exhaust pipe
DE102010047275A1 (en) * 2010-10-01 2012-04-05 Emitec Gesellschaft Für Emissionstechnologie Mbh exhaust system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1033461B (en) * 1956-11-15 1958-07-03 Hanomag Ag Device for the reduction and easy removal of carbon deposits and deposits from combustion residues in or after control organs

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1033461B (en) * 1956-11-15 1958-07-03 Hanomag Ag Device for the reduction and easy removal of carbon deposits and deposits from combustion residues in or after control organs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010034250A1 (en) * 2010-08-13 2012-02-16 Emitec Gesellschaft Für Emissionstechnologie Mbh Holder for at least one electrode in an exhaust pipe
DE102010047275A1 (en) * 2010-10-01 2012-04-05 Emitec Gesellschaft Für Emissionstechnologie Mbh exhaust system
US9726059B2 (en) 2010-10-01 2017-08-08 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Exhaust system, motor vehicle having an exhaust system and method for operating a motor vehicle

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