DE2951621A1 - Regenerating catalyst-coated car exhaust purifier - by passage of gas heated to higher than normal operating temp. - Google Patents

Regenerating catalyst-coated car exhaust purifier - by passage of gas heated to higher than normal operating temp.

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Publication number
DE2951621A1
DE2951621A1 DE19792951621 DE2951621A DE2951621A1 DE 2951621 A1 DE2951621 A1 DE 2951621A1 DE 19792951621 DE19792951621 DE 19792951621 DE 2951621 A DE2951621 A DE 2951621A DE 2951621 A1 DE2951621 A1 DE 2951621A1
Authority
DE
Germany
Prior art keywords
exhaust gas
gases
gas cleaning
normal operating
gas
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Withdrawn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
DE19792951621
Other languages
German (de)
Inventor
Ing.(grad.) Martin Herbert 6450 Hanau Völker
Polat Dipl.-Ing. 3180 Wolfsburg Öser
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 3180 Wolfsburg De Degussa Ag 6000
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 DE19792951621 priority Critical patent/DE2951621A1/en
Publication of DE2951621A1 publication Critical patent/DE2951621A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • 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
    • 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
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/10—Combinations of different methods of purification cooling and filtering
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The procedure for regenerating catalyst-coated motor vehicle exhaust gas purifiers is for purifiers whose effectiveness has been impaired by the deposition of fuel- borne contaminants. It involves passing through gas pref. at 650-1100 deg.C, more pref. between 850 and 1000 deg.C, through the purifier. For purifiers using a rhodium-bearing catalyst at least, inert gas is used. Leaving the purifier the gas flows through a filler which traps the extracted contaminants; it may then be recycled. The gas may be cooled between purifier and filter, to ensure deposition of all contaminants.

Description

Verfahren und Vorrichtung zur Regeneration Method and device for regeneration

von Abgasreinigungsvorrichtungen Die Erfindung bezieht sich auf ein Verfahren zur Regeneration von mit katalytisch wirksamen Stoffen beschichteten Abgasreinigungsvor richtungen von Kraftfahrzeugen gemäß dem Oberbegriff des Anspruchs 1 sowie auf eine Vorrichtung zur Durchführung des Verfahrens. of exhaust gas purification devices The invention relates to a Process for the regeneration of catalytically active substances coated exhaust gas cleaning before directions of motor vehicles according to the preamble of claim 1 and on one Device for carrying out the method.

Bekanntlich wird die Wirksamkeit der mit katalytischen Stoffen beschichteten Abgasreinigungsvorrichtungen von Kraftfahrzeugen dadurch beeinträchtigt, daß während des Betriebs die für den Antrieb der Kraftfahrzeuge verwendeten Kraftstoffe häufig Beimengungen aufweisen, die sich auf den Katalysatorschichten absetzen und dadurch deren Aktivität verringern. Solche, die Katalysatoren "vergiftenden Stoffe" sind vor allem Blei, in geringerem Maße aber auch zum Beispiel Calzium und Phosphor.As is well known, the effectiveness of those coated with catalytic substances is known Exhaust gas cleaning devices of motor vehicles impaired by the fact that during of the company, the fuels used to drive motor vehicles are often used Have additions that settle on the catalyst layers and thereby reduce their activity. Those, the catalysts are "poisoning substances" especially lead, but to a lesser extent also calcium and phosphorus.

Die der vorliegenden Erfindung zugrundeliegende Aufgabe besteht daher darin, ein Verfahren und eine Vorrichtung zu schaffen, mit deren Hilfe die durch solche Kraftstoffbeimengungen vergifteten Abgasreinigungsvorrichtungen wieder in einen aktiven, das heißt wiederverwendbaren Zustand versetzt werden.The object on which the present invention is based therefore exists is to provide a method and an apparatus, with the help of which by such fuel admixtures poisoned emission control devices again put into an active, i.e. reusable, state.

Die Lösung dieser Aufgabe ergibt sich gemäß dem Kennzeichen des Anspruchs 1. Erfinderseitig ist nämlich festgestellt worden, daß bei einer Beaufschlagung der Katalysatoren mit Gasen in einem Bereich zwischen 650 und 11000C, vorzugsweise zwischen 850 und 10000C, die auf diesen niedergeschlagenen Kraftstoffbeimengungen, wie insbesondere das Blei, gelöst und in nachgeschalteten Filtern aufgefangen werden können. Die Behandlungsdauer liegt dabei je nach Höhe der verwendeten Gastemperatur zwischen 30 Minuten und 5 Stunden, wobei in dem bevorzugten Temperaturbereich eine Behandlungsdauer von etwa einer Stunde ausreichend sein dürfte.The solution to this problem results from the characterizing part of the claim 1. On the part of the inventor, it has been established that when admitted of the catalysts with gases in a range between 650 and 11000 ° C., preferably between 850 and 10000C, the fuel additives precipitated on these, like lead, in particular, is dissolved and collected in downstream filters can. The duration of the treatment depends on the level of the gas temperature used between 30 minutes and 5 hours, with one in the preferred temperature range Treatment duration of about one hour should be sufficient.

Bei Abgasreinigungsvorrichtungen, die als katalytisch wirksame Stoffe u.a. Rhodium enthalten, sollten für die Durchströmung Inertgase, wie zum Beispiel Stickstoff oder auch Fahrzeugabgase, verwendet werden. Für nicht Rhodium enthaltende Katalysatoren können dagegen auch Sauerstoff enthaltende Gase, vor allem Luft, verwendet werden. Der Grund dafür liegt darin, daß Rhodium durch Sauerstoff oxidiert und dadurch die katalytische Wirkung beeinträchtigt werden könnte.In the case of exhaust gas cleaning devices that act as catalytically active substances contain rhodium, inert gases such as Nitrogen or vehicle exhaust gases can be used. For those not containing rhodium On the other hand, catalysts can also be used with gases containing oxygen, especially air will. The reason for this is that rhodium is oxidized by oxygen and thereby the catalytic effect could be impaired.

Zur Durchführung des Verfahrens wird gemäß der Erfindung eine Vorrichtung vorgeschlagen, bei der die Abgasreinigungsvorrichtung in eine von einer Gasströmung beaufschlagte Leitung einschaltbar ist, die eine Gasströmung auf Temperaturen oberhalb der normalen Betriebstemperatur aufheizende Heizvorrichtung aufweist. Hinter der Abgasreinigungsvorrichtung kann dann ein Filter zur Aufnahme der aus der Abgasreinigungsvorrichtung ausgelösten Kraftstoffbeimengungen angeordnet sein, der diese Beimengungen aus der Gasströmung ausscheidet, so daß die Möglichkeit des Nachweises dieser Beimengungen als auch die Möglichkeit des Aufbaus eines geschlossenen Kreislaufes für die Gase gegeben ist.According to the invention, an apparatus is used to carry out the method proposed in which the exhaust gas purification device in one of a gas flow acted upon line can be switched on, the gas flow to temperatures above has the normal operating temperature heating device. Behind the An exhaust gas purification device can then be a filter for receiving the emissions from the exhaust gas purification device triggered fuel admixtures be arranged, these admixtures from the Gas flow is eliminated, so that the possibility of detecting these admixtures as well as the possibility of building a closed circuit for the gases given is.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung anhand eines schematischen Schaltbildes einer Regeneriervorrichtung für Abgasreinigungsvorrichtungen gezeigt. Dabei ist die gesamte Vorrichtung mit 1, ein üblicherweise in der Abgasleitung eines Kraftfahrzeugs zum Zwecke der Reinigung der Abgase von schädlichen Bestandteilen eingeschalteter Abgaskatalysator mit 2 und eine von einer Gasströmung beaufschlagte Leitung mit 3 bezeichnet. 4 stellt einen Behälter dar, aus dem die beispielsweise aus Inertgasen, wie Stickstoff, bestehenden Gase mittels einer Pumpe 5 abgesaugt und über eine beispielswoise elektrische Heizvorrichtung 6 zu dem Abgaskatalysator 2 gefördert wird. In Strömungsrichtung hinter dem Abgaskatalysator 2 ist ein Filter 7 angeordnet, in dem die von der heißen Gasströmung in dem Katalysator ausgelösten Beimengungen wie Blei, Calcium, Phosphor und dgl.In the drawing, an embodiment of the invention is based on a schematic circuit diagram of a regeneration device for exhaust gas purification devices shown. The entire device is marked with 1, usually one in the exhaust pipe of a motor vehicle for the purpose of cleaning the exhaust gases from harmful components switched on Catalytic converter with 2 and one from a gas flow acted upon line is designated by 3. 4 shows a container from which the for example gases consisting of inert gases such as nitrogen by means of a pump 5 sucked off and via an example electrical heating device 6 to the catalytic converter 2 is funded. In the direction of flow behind the catalytic converter 2 is a filter 7 arranged in which the triggered by the hot gas flow in the catalyst Additions such as lead, calcium, phosphorus and the like.

aufgefangen und abgeschieden werden.be caught and separated.

8 und 9 bezeichnen zwei Flansche, zwischen denen der Abgaskatalysator 2 in die Abgasleitung 3 eingeschaltet wird, während mit 10 das Leitungsende angegeben ist, aus dem die Gase ins Freie abgeblasen werden. Um den Verbrauch an Gasen, insbesondere an Inertgasen, sowie an Heizungsenergie zu verringern, könnte das Leitungsende 10 auch an dem Behälter 4 bzw. an die Leitung 3 vor der Pumpe 5 angeschlossen werden, so daß sich ein geschlossener Kreislauf für das Gas ergibt.8 and 9 designate two flanges, between which the catalytic converter 2 is switched into the exhaust pipe 3, while 10 indicates the end of the line from which the gases are blown off into the open. To the consumption of gases, in particular To reduce inert gases and heating energy, the line end 10 can also be connected to the container 4 or to the line 3 in front of the pump 5, so that there is a closed circuit for the gas.

Die Heizvorrichtung 6 ist so bemessen, daß sie die Gas strömung auf eine Temperatur oberhalb der normalen Betriebstemperatur des Abgaskatalysators aufheizt. Während normale Betriebstemperaturen für in einer Abgasleitung einer Brennkraftmaschine von Kraftfahrzeugen eingeschaltete Abgaskatalysatoren bis zu etwa 6000C betragen, soll die zur Auslösung der Giftstoffe durch den Katalysator geleitete Gas strömung mindestens 6500C 0 0 0 und höchstens 11000C, vorzugsweise aber 850°C bis 1000 C, betragen, um so einerseits eine möglichst vollständige und schnelle Auslösung der Giftstoffe zu erreichen, andererseits aber eine Schädigung des Katalysators durch Übertemperaturen zu vermeiden.The heater 6 is dimensioned so that it flows on the gas heats up a temperature above the normal operating temperature of the catalytic converter. During normal operating temperatures for in an exhaust pipe of an internal combustion engine Catalytic converters switched on by motor vehicles are up to about 6000C, is the gas flow passed through the catalytic converter to release the toxins at least 6500C 0 0 0 and at most 11000C, but preferably 850 ° C to 1000 C, amount to, on the one hand, a complete and quick triggering of the To reach toxins, but on the other hand damage the catalyst Avoid excess temperatures.

In der Zeichnung ist hinter dem Abgaskatalysator 2, aber noch vor dem Filter 7 ein Kühlsystem 11 bis 14 angeordnet. Dieses Kühlsystem wird hier durch ein im geschlossenen Kreislauf umlaufendes und von einer Pumpe 14 gefördertes Arbeitsmittel gebildet, das in einem vor dem Filter 7 angeordneten Wärmetauscher 11 Wärme aus dem Gasstrom aufnimmt und diese in einem zweiten Wärmetauscher 12 abgibt. Dieser zweite Wärmetauscher 12 kann dabei als Luftkühler ausgebildet sein, der von einem mittelg eines Ventilators 13 geförderten Kühl-Luftstrom beaufschlagt wird.In the drawing is behind the catalytic converter 2, but still in front the filter 7 a cooling system 11 to 14 is arranged. This cooling system is going through here a working medium circulating in a closed circuit and conveyed by a pump 14 formed, which in a arranged in front of the filter 7 heat exchanger 11 heat absorbs the gas flow and releases it in a second heat exchanger 12. This second heat exchanger 12 can be designed as an air cooler, which is from a medium a fan 13 promoted cooling air flow applied will.

Dieses Kühlsystem 11 bis 14 soll die durch die Leitung 3 strömenden Gase vor dem Filter soweit abkühlen, daß in dem Filter eine quantitative Abscheidung der aus der Abgasreinigungsvorrichtung 2 gelösten Giftstoffe möglich ist. Bei einer Abkühlung auf Temperaturen unter 3500C wird sichergestellt, daß das Filter geschont und alle abzuscheidenden Bestandteile des Gasstromes auskondensiert und in feste oder flüssige Form überführt werden.This cooling system 11 to 14 is intended to be the one flowing through the line 3 Cool the gases in front of the filter to such an extent that a quantitative separation occurs in the filter the toxins released from the exhaust gas cleaning device 2 is possible. At a Cooling down to temperatures below 3500C ensures that the filter is protected and all the constituents of the gas stream to be separated out are condensed and converted into solids or liquid form.

Claims (9)

N SPRÜCHE Verfahren zur Regeneration von mit katalytisch wirksamen Stoffen beschichteten Abgasreinigungsvorrichtungen von Kraftfahrzeugen, deren Wirksamkeit während des Betriebes durch in dem Kraftstoff enthaltene und auf der Abgasreinigungsvorrichtung niedergeschlagene Beimengungen herabgesetzt worden ist, dadurch gekennzeichnet, daß die Bbgasreinigungsvorrichtungen von Gasen mit Temperaturen oberhalb der normalen Betriebstemperatur durchströmt werden. N PROBESTS Process for the regeneration of with catalytically active Substances coated exhaust gas cleaning devices of motor vehicles, their effectiveness during operation by contained in the fuel and on the exhaust gas purification device precipitated admixtures have been reduced, characterized in that that the gas cleaning devices of gases with temperatures above normal Operating temperature are flowed through. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Gastemperatur im Bereich zwischen 650 und 11000C, vorzugsweise zwischen 850 und 100000, liegt. 2. The method according to claim 1, characterized in that the gas temperature in the range between 650 and 11000C, preferably between 850 and 100000. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zumindest für Abgasreinigungsvorrichtungen mit Rhodium enthaltenden Katalysatorschichten zur Durchströmung Inertgase herangezogen werden. 3. The method according to claim 1 or 2, characterized in that at least for exhaust gas cleaning devices with catalyst layers containing rhodium inert gases are used for the flow through. 4. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Abgasreinigungsvorrichtung (2) in eine von einer Gasströmung beaufschlagte Leitung (3) eingeschaltet ist, die eine die Gas strömung auf Temperaturen oberhalb der normalen Betriebstemperatur aufheizende Heizvorrichtung (6) aufweist. 4. Device for performing the method according to one of the claims 1 to 3, characterized in that the exhaust gas cleaning device (2) in a acted upon by a gas flow line (3) is switched on, the one the Gas flow heating up to temperatures above normal operating temperature Has heating device (6). 5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß in Strömungsrichtung hinter der Abgasreinigungsvorrichtung (2) in der Leitung (3) ein Filter (7) zur Aufnahme der aus der Abgasreinigungsvorrichtung ausgelösten Kraftstoffbeimengungen angeordnet ist.5. Apparatus according to claim 4, characterized in that in the flow direction behind the exhaust gas cleaning device (2) in the line (3) a filter (7) for Recording of the fuel additions released from the exhaust gas cleaning device is arranged. 6. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Gase in einem geschlossenen Kreislauf umlaufen.6. Apparatus according to claim 4 or 5, characterized in that the gases circulate in a closed circuit. 7. Vorrichtung nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß die Gase aus Inertgasen bestehen.7. Device according to one of claims 4 to 6, characterized in that that the gases consist of inert gases. 8. Vorrichtung nach einem der Ansprüche 4 - 7, dadurch gekennzeichnet, daß vor dem Filter (7) eine Kühlvorrichtung (11 - 14) vorgesehen ist.8. Device according to one of claims 4-7, characterized in that that a cooling device (11-14) is provided in front of the filter (7). 9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Kühlvorrichtung (11 - 14) die Gasströmung auf eine Temperatur von höchstens 3500C abkühlt.9. Apparatus according to claim 8, characterized in that the cooling device (11-14) cools the gas flow to a temperature not exceeding 3500C.
DE19792951621 1979-12-21 1979-12-21 Regenerating catalyst-coated car exhaust purifier - by passage of gas heated to higher than normal operating temp. Withdrawn DE2951621A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792951621 DE2951621A1 (en) 1979-12-21 1979-12-21 Regenerating catalyst-coated car exhaust purifier - by passage of gas heated to higher than normal operating temp.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792951621 DE2951621A1 (en) 1979-12-21 1979-12-21 Regenerating catalyst-coated car exhaust purifier - by passage of gas heated to higher than normal operating temp.

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DE2951621A1 true DE2951621A1 (en) 1981-07-02

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573127A1 (en) * 1984-11-12 1986-05-16 Rognon Armand EXHAUST SYSTEM FOR COMBUSTION GASES OF AN INTERNAL COMBUSTION ENGINE.
EP0311992A1 (en) * 1987-10-16 1989-04-19 Atlas Fahrzeugtechnik GmbH Method and device for soot oxidation in diesel engines
DE4424474C1 (en) * 1994-07-12 1995-11-09 Daimler Benz Ag Method of cleaning catalysers, in partic. removal of carbon black coating in diesel engines
EP0809000A2 (en) * 1996-05-24 1997-11-26 Toyota Jidosha Kabushiki Kaisha An exhaust gas purification device for an internal combustion engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573127A1 (en) * 1984-11-12 1986-05-16 Rognon Armand EXHAUST SYSTEM FOR COMBUSTION GASES OF AN INTERNAL COMBUSTION ENGINE.
US4665689A (en) * 1984-11-12 1987-05-19 Armand Rognon Exhaust system for the combustion gases of an internal combustion engine
EP0311992A1 (en) * 1987-10-16 1989-04-19 Atlas Fahrzeugtechnik GmbH Method and device for soot oxidation in diesel engines
DE4424474C1 (en) * 1994-07-12 1995-11-09 Daimler Benz Ag Method of cleaning catalysers, in partic. removal of carbon black coating in diesel engines
EP0809000A2 (en) * 1996-05-24 1997-11-26 Toyota Jidosha Kabushiki Kaisha An exhaust gas purification device for an internal combustion engine
EP0809000A3 (en) * 1996-05-24 1998-06-03 Toyota Jidosha Kabushiki Kaisha An exhaust gas purification device for an internal combustion engine
US6029443A (en) * 1996-05-24 2000-02-29 Toyota Jidosha Kabushiki Kaisha Catalyst with upstream cooling and downstream heating

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