WO2001088346A1 - Device for treating exhaust gases - Google Patents

Device for treating exhaust gases Download PDF

Info

Publication number
WO2001088346A1
WO2001088346A1 PCT/DE2001/001806 DE0101806W WO0188346A1 WO 2001088346 A1 WO2001088346 A1 WO 2001088346A1 DE 0101806 W DE0101806 W DE 0101806W WO 0188346 A1 WO0188346 A1 WO 0188346A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
internal combustion
particle filter
fuel
combustion engine
Prior art date
Application number
PCT/DE2001/001806
Other languages
German (de)
French (fr)
Inventor
Johannes Schaller
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP01947140A priority Critical patent/EP1287238A1/en
Priority to JP2001584717A priority patent/JP2003533626A/en
Priority to US10/276,468 priority patent/US20040013579A1/en
Publication of WO2001088346A1 publication Critical patent/WO2001088346A1/en

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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • 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
    • 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
    • F01N2240/16—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 electric heater, i.e. a resistance heater
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel

Definitions

  • the invention relates to a device for exhaust gas treatment of an internal combustion engine, in particular a diesel internal combustion engine, with a particle filter according to the preamble of claim 1.
  • Diesel engines in particular produce large amounts of soot, with the suspicion that diesel exhaust gases have a carcinogenic potential.
  • Many arrangements for treating diesel exhaust have been proposed. In general these arrangements consist of filter systems that retain the particulate matter. An efficient filter effectively holds back the soot particles, which in particular have a diameter of approximately 10 to 5000 nanometers.
  • the particles retained by the corresponding filters cause a reduction in the gas throughput due to the covering of the filter or its surface and thereby cause an increase in the filtration resistance.
  • This resistance leads to an increased consumption of fuel up to engine standstill, so that frequent regeneration must be provided.
  • the regeneration generally takes place through an almost residue-free spreading of the stored soot.
  • the temperatures of approx. 200 ° C in the diesel exhaust are generally not sufficient for this, so that additional system aids must be provided.
  • the soot oxidizes from approx. 550 to 600 ° C without additional measures.
  • the lower temperature threshold for soot oxidation can be lowered to approx. 250 to 350 ° C.
  • these temperatures for modern diesel engines are always nocti above normal exhaust gas temperatures, so that temperature-increasing measures are necessary for safe filter regeneration.
  • the object of the invention is to propose a device for exhaust gas treatment of an internal combustion engine, in particular a diesel internal combustion engine, with a particle filter, which significantly reduces the system-related outlay and at the same time ensures reliable particle filter regeneration at every operating point, with no safety-related risks.
  • the invention is in accordance with the invention Device characterized in that the device comprises a catalytic burner, the burner being arranged between the internal combustion engine and the particle filter.
  • the provision of a readily ignitable and combustible fuel mixture and a device for igniting the mixture are advantageously dispensed with. Safety-related risks associated with the ignition and burning of the fuel mixture are eliminated.
  • the catalytic material of the burner according to the invention ensures a conversion of fuel even at exhaust gas temperatures of approximately 200 ° C.
  • a fuel metering device is preferably arranged between the internal combustion engine and the catalytic burner, so that fuel is supplied as required: Fuel is metered into the exhaust gas upstream of the catalytic burner when, for example, the exhaust gas back pressure has reached a predetermined limit. For example, the fuel metering is stopped when the filter f is burned in.
  • the fuel metering device comprises a
  • Fuel dispersion unit is so placed that the supplied fuel comparatively well with the catalytic material of the burner into contact with the metered fuel is completely reacted and thereby released the time required to 'filter regeneration heat.
  • a control of the fuel metering device is advantageously provided, so that the fuel metering takes place automatically, for example, at a predetermined counterpressure of the exhaust gas and in turn automatically switches off when the filter is burnt free.
  • a flexible adjustment of the fuel supply is possible, for example depending on the exhaust gas flow and / or its soot content.
  • the device according to the invention advantageously comprises a nitrogen oxide oxidation unit, which in the exhaust gas stream increasingly generates nitrogen dioxide (N0 2 ) from nitrogen monoxide (NO) and oxygen (0 2 ).
  • N0 2 nitrogen dioxide
  • NO nitrogen monoxide
  • oxygen (0 2 )
  • the reverse process takes place in the downstream particle filter and the oxygen atom that has become clean burns the carbon of the soot even at lower exhaust gas temperatures, so that an even more reliable particle filter regeneration is guaranteed.
  • comparatively low-sulfur diesel fuel is used, as a result of which permanent damage to the nitrogen oxide oxidation unit can be prevented.
  • the device preferably comprises a coated particle filter, which ensures a further lowering of the lower soot oxidation temperature.
  • the regeneration on a catalytically coated wall proceeds comparatively slowly, so that the corresponding substances are advantageously completely converted.
  • the device comprises a heating device.
  • a reliable particle filter regeneration is ensured by means of an electric heater even under the most difficult operating conditions, for example during a cold start, with overrun fuel cutoff / etc.
  • de - «-: catalytic burners can be brought to an optimal operating temperature comparatively quickly.
  • the invention described above ensures safe particle filter regeneration even under the most difficult conditions, such as those found in internal combustion engines of vehicles, in particular when there are rapid load changes, under cold start conditions, in overrun fuel cutoff or when operating at different speeds.
  • FIG. 1 is a schematic representation of a device for exhaust gas treatment according to the invention
  • Fig. 2 is a schematic representation of a development of the device according to the invention with a nitrogen oxide oxidation unit and a • heating device and
  • Fig. 3 is a schematic representation of a second development of the device according to the invention with a coated particle filter.
  • Figure 1 shows a device 1 for exhaust gas treatment, exhaust gas 2 (with a temperature of about 200 ° C) meets a catalytic burner 3 and then one Particulate filter 4 flows through. Is scattered 5 fuel by a fuel metering device prior to the catalytic burner 3 so that the exhaust gas 2 in the catalytic burner 3 due to the oxidation of fuel (HC) to water (H 2 0) and carbon dioxide (C0 2) and the thereby liberated heat to approx. 600 ° C is heated. At these exhaust gas temperatures, the carbon (C) of the diesel soot reacts in the particle filter 4 with the residual oxygen (O a ) present in the exhaust gas 2, which combines to form carbon dioxide (C0 2 ).
  • fuel (HC) is supplied to the device 1, for example after a predetermined exhaust gas back pressure has been reached, and is metered into the exhaust gas stream until the particle filter 4 has burned free, and the end of the supply can also be pressure-controlled.
  • FIG. 2 shows a further development of the device 1, a heating device 6 on the catalytic burner 3 and a nitrogen oxide oxidation unit 7 being additionally arranged between the catalytic burner 3 and the particle filter 4 in comparison with the device from FIG. Additional heating of the exhaust gas 2 may be necessary for certain operating conditions of the engine of a vehicle, such as, for example, during a cold start or during overrun fuel cutoff.
  • the heating device 6 which is supplied, for example, by the in-vehicle electrical sources, such as the battery or alternator, reliable particle filter regeneration is ensured even under difficult operating conditions.
  • the catalytic burner 3 can be heated selectively by means of the heating device 6, so that an optimal oxidation of the supplied fuel is ensured.
  • Nitrogen monoxide (NO) of the exhaust gas 2 is oxidized to nitrogen dioxide (NO.,) By means of the nitrogen oxide oxidation unit 7. There is advantageously a continuous combustion of the soot residues in the
  • Particulate filter 4 from an Ahgas temperature of approx. 250 ° C.
  • the catalytic burner is only switched on if this
  • the exemplary embodiment of FIG. 1 comprises a coated particle filter 8 instead of the particle filter 4.
  • Another nitric oxide treatment can be added afterwards if necessary.
  • the catalytic coating advantageously also lowers the temperature required for the direct oxidation of soot.
  • the fuel for the catalytic burner 3 can be supplied both preferably in gaseous form and in liquid form.
  • the fuel supply can take place both periodically and continuously.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention relates to a device (1) for treating exhaust gases from an internal combustion engine, especially a diesel engine, fitted with a particulate filter (4). Said device is to be produced at a cost lower than conventional systems and provides safe regeneration of said particulate filter. In so doing, said device (1) comprises a catalytic after-burner (3) arranged between said internal combustion engine and said particulate filter (4).

Description

"Vorrichtung zur Abgasbehandlung""Device for exhaust gas treatment"
Die Erfindung betrifft eine Vorrichtung zur Abgasbehandlung einer BrennkraftStoff aschine, insbesondere einer Dieselbrennkraftmaschine, mit einem Partikelfilter nach, dem Oberbegriff des Anspruchs 1.The invention relates to a device for exhaust gas treatment of an internal combustion engine, in particular a diesel internal combustion engine, with a particle filter according to the preamble of claim 1.
Stand der TechnikState of the art
Entsprechend dem fortschreitenden Kenntnisstand werden zum Schutz der Gesundheit und der Umwelt gesetzliche Vorgaben, die die Emissionen von Kraftfahrzeugen regeln, ständig verschärft . Zur Erfüllung dieser Vorgaben werden beispielsweise, neben der Verwendung von entsprechend modifizierten Treibstoffen, feste Partikel mittels Filter aus dem Abgas entfernt .In accordance with the advancing level of knowledge, legal requirements regulating the emissions of motor vehicles are constantly being tightened to protect health and the environment. To meet these requirements, for example, in addition to the use of appropriately modified fuels, solid particles are removed from the exhaust gas by means of filters.
Besonders Dieselantriebe produzieren große Mengen Ruß, wobei der Verdacht besteht, dass Dieselabgase eine Krebs erzeugende Potenz besitzen. So wurden bereits viele Anordnungen zur Behandlung von Dieselabgas vorgeschlagen. Im Allgemeinen bestehen diese Anordnungen aus FilterSystemen, die die partikulären Inhaltsstoffe zurückhalten. Ein effizienter Filter hält hierbei die Rußpartikel , die insbesondere einen Durchmesser von ca. 10 bis 5000 Nanometern aufweisen, wirkungsvoll zurüc .Diesel engines in particular produce large amounts of soot, with the suspicion that diesel exhaust gases have a carcinogenic potential. Many arrangements for treating diesel exhaust have been proposed. In general these arrangements consist of filter systems that retain the particulate matter. An efficient filter effectively holds back the soot particles, which in particular have a diameter of approximately 10 to 5000 nanometers.
Die von entsprechenden Filtern zurückgehaltenen Teilchen verursachen jedoch durch Belegung des Filters bzw. seiner Oberfläche eine Verringerung des Gasdurchsatzes und bewirken hierdurch einen Anstieg des Filtrationswiderstandes. Dieser Widerstand führt zu einem Mehrverbrauch an Treibstoff bis hin zum Motorstillstand, so dass eine häufige Regeneration vorgesehen werden muss. Die Regeneration erfolgt im Allgemeinen durch eine nahezu rückstandsfreie Verbreimuing des gespeicherten Rußes . Die im Dieselabgas vorhandenen Temperaturen von ca. 200°C reichen hierzu in aller Regel nicht aus, so dass zusätzliche Systemhilfen bereitgestellt werden müssen.The particles retained by the corresponding filters, however, cause a reduction in the gas throughput due to the covering of the filter or its surface and thereby cause an increase in the filtration resistance. This resistance leads to an increased consumption of fuel up to engine standstill, so that frequent regeneration must be provided. The regeneration generally takes place through an almost residue-free spreading of the stored soot. The temperatures of approx. 200 ° C in the diesel exhaust are generally not sufficient for this, so that additional system aids must be provided.
Ohne zusätzliche Maßnahmen oxidiert der Ruß ab ca. 550 bis 600°C. Durch Kombination des Rußfilters mit einem Oxidationskatalysator oder durch katalytische Beschichfcung des Filters lässt sich die untere Temperaturschwelle für die , Rußoxidation- auf ca. 250 bis 350°C absenken. Jedoch liegen diese Temperaturen für moderne Dieselmotoren immer nocti oberhalb üblicher Abgastemperaturen, so dass temperatursteigernde Maßnahmen zur sicheren Filterregeneration notwendig sind.The soot oxidizes from approx. 550 to 600 ° C without additional measures. By combining the soot filter with an oxidation catalyst or by catalytically coating the filter, the lower temperature threshold for soot oxidation can be lowered to approx. 250 to 350 ° C. However, these temperatures for modern diesel engines are always nocti above normal exhaust gas temperatures, so that temperature-increasing measures are necessary for safe filter regeneration.
Zur Steigerung der Abgastemperatur werden bislang beispielsweise elektrische Zuheizungen, Mikrowellenheizungen oder innermotorische Maßnahmen vorgesehen, wobei diese beispielsweise aufgrund der erforderlichen hohen Heizleistung gegebenenfalls zusätzliche Batterien erforderlich machen, einen hohen Systemaufwand aufweisen oder die notwendige Temperaturerhöhung nicht sicher gewährleisten können. So werden bei Nutzkraftwagen zum Teil auch Brenner eingesetzt , wobei mit einer offenen Flamme der Filter freigebrannt wird . Hierbei sind j edoch die Anforderungen bezüglich Temperaturgleichverteilung, Zündbedingungen, Brenngesetz usw. sehr anspruchsvoll , so dass entsprechende Systeme recht aufwendig zu realisieren sind . Weiterhin stellt besonders das Zünden und das Verbrennen mit offener Flamme hohe sicherheitstechnische Anforderungen an das gesamte System.To increase the exhaust gas temperature, for example, electrical auxiliary heating, microwave heating or internal engine measures have been provided, for example because of the high heating power required, these may require additional batteries, have a high system complexity or cannot reliably ensure the necessary temperature increase. For example, burners are sometimes used in commercial vehicles, the filter being burned free with an open flame. However, the requirements with regard to uniform temperature distribution, ignition conditions, combustion law etc. are very demanding, so that corresponding systems can be implemented in a very complex manner. Furthermore, ignition and burning with an open flame places high safety requirements on the entire system.
Diese Abgasfiltersysteme sind demnach insgesamt vergleichsweise aufwendig und/oder gewährleisten keine sichere Temperaturerhöhung zur Regeneration des Partikelfilters in j edem Betriebspunkt .These exhaust gas filter systems are therefore comparatively complex overall and / or do not ensure a safe temperature increase for regeneration of the particle filter at any operating point.
Vorteile der ErfindungAdvantages of the invention
Aufgabe der Erfindung ist es demgegenüber, eine Vorrichtung zur Abgasbehandlung einer Brennkraftmaschine , insbesondere einer Dieselbrennkraftmaschine, mit einem Partikelfilter vorzuschlagen, das den systembedingten Aufwand deutlich reduziert und gleichzeitig eine sichere Partikelfilterregeneration in jedem Betriebspunkt gewährleistet , wobei keine sicherheitstechnischen Risiken entstehen.In contrast, the object of the invention is to propose a device for exhaust gas treatment of an internal combustion engine, in particular a diesel internal combustion engine, with a particle filter, which significantly reduces the system-related outlay and at the same time ensures reliable particle filter regeneration at every operating point, with no safety-related risks.
Diese Aufgabe wird ausgehend von einer Vorrichtung der einleitend genannten Art durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst .This object is achieved on the basis of a device of the type mentioned in the introduction by the characterizing features of claim 1.
Durch die in den ünteransprüchen genannten Maßnahmen sάnd vorteilhafte Ausführungen und Weiterbildungen der Erfindung möglich .The measures mentioned in the subclaims make possible advantageous embodiments and developments of the invention.
Dementsprechend zeichnet sich eine er f indungs gemäße Vorrichtung dadurch aus, dass die Vorrichtung einen katalytischen Brenner umfasst, wobei der Brenner zwischen der Brennkraftmaschine und dem Partikelfilter angeordnet ist.Accordingly, the invention is in accordance with the invention Device characterized in that the device comprises a catalytic burner, the burner being arranged between the internal combustion engine and the particle filter.
Mit Hilfe einer derartigen Vorrichtung wird Kraftstoff (HC) mit Sauerstoff (02) am Katalysator zu Wasser (H20) und Kohlendioxid (C02) umgesetzt. Durch die dabei freigesetzte Reaktionswärme wird die Abgastemperatur auf die Regenerationstemperatur angehoben, so dass die Regeneration des Partikelfilters einsetzt.With the help of such a device, fuel (HC) with oxygen (0 2 ) on the catalyst is converted to water (H 2 0) and carbon dioxide (C0 2 ). Due to the heat of reaction released, the exhaust gas temperature is raised to the regeneration temperature, so that the regeneration of the particle filter begins.
Vorteilhafterweise entfällt erfindungsgemäß die Bereitstellung eines gut zünd- und brennfähigen Kraftstoffgemisches sowie eine Vorrichtung zum Zünden des Gemisches. Sicherheitstechnische Risiken, die das Zünden sowie das Verbrennen des Kraftstoffgemisches mit sich bringen, entfallen. Das katalytische Material des erfindungsgemäßen Brenners gewährleistet einen Umsatz von Kraftstoff bereits bei Abgastemperaturen von ca. 200°C.According to the invention, the provision of a readily ignitable and combustible fuel mixture and a device for igniting the mixture are advantageously dispensed with. Safety-related risks associated with the ignition and burning of the fuel mixture are eliminated. The catalytic material of the burner according to the invention ensures a conversion of fuel even at exhaust gas temperatures of approximately 200 ° C.
Vorzugsweise ist zwischen der Brennkraftmaschine und dem katalytischen Brenner eine Kraftstoffzumessvorrichtung angeordnet, so dass Kraftstoff bedarfsgerecht zugeführt: wird, d.h. Kraftstoff wird in den Abgasstro vor dem katalytischen Brenner zugemessen, wenn beispielsweise der Abgasgegendruck einen vorgegebenen Grenzwert erreicht hat. Beispielsweise wird die Kraftstoffzumessung gestoppt, wenn der Filter f eigebrannt ist .A fuel metering device is preferably arranged between the internal combustion engine and the catalytic burner, so that fuel is supplied as required: Fuel is metered into the exhaust gas upstream of the catalytic burner when, for example, the exhaust gas back pressure has reached a predetermined limit. For example, the fuel metering is stopped when the filter f is burned in.
In einer besonderen Weiterbildung der Erfindung umfasst: die KraftstoffZumessvorrichtung eineIn a special development of the invention, the fuel metering device comprises a
KraftstoffZerstreuungseinheit, so dass der zugeführte Kraftstoff vergleichsweise gut mit dem katalytischen Material des Brenners in Kontakt gebracht wird, wobei der zugemessene Kraftstoff vollständig umgesetzt und hierdurch die zur' Filterregeneration notwendige Wärme freigesetzt wird. Vorteilhafterweise ist eine Steuerung der KraftstoffZumessvorrichtung vorgesehen, so dass die Kraftstoffzumessung beispielsweise automatisch bei einem vorgegebenem Gegendruck des Abgases erfolgt und wiederum automatisch abschaltet, wenn der Filter freigebrannt ist. Weiterhin ist eine flexible Anpassung der KraftstoffZuführung möglich, beispielsweise in Abhängigkeit des Abgasstromes und/oder dessen Rußgehaltes.Fuel dispersion unit is so placed that the supplied fuel comparatively well with the catalytic material of the burner into contact with the metered fuel is completely reacted and thereby released the time required to 'filter regeneration heat. A control of the fuel metering device is advantageously provided, so that the fuel metering takes place automatically, for example, at a predetermined counterpressure of the exhaust gas and in turn automatically switches off when the filter is burnt free. Furthermore, a flexible adjustment of the fuel supply is possible, for example depending on the exhaust gas flow and / or its soot content.
Vorteilhafterweise umfasst die erfindungsgemäße Vorrichtung eine Stickoxid-Oxidationseinheit , wobei diese im Abgasstrom vermehrt Stickstoffdioxid (N02) aus Stickstoffmonoxid (NO) und Sauerstoff (02) erzeugt. Im nachgeschalteten Partikelfilter erfolgt der umgekehrte Vorgang und das rei gewordene Sauerstoffatom verbrennt den Kohlenstoff des Rußes bereits bei tieferen Abgaste peraturen, so dass eine noch sichere Partikelfilterregeneration gewährleistet wird. Hierbei ist jedoch bei einer Dieselbrennkraftmaschine zu beachten, dass vergleichsweise schwefelarmer Dieselkraftstoff verwendet wird, wodurch sich eine nachhaltige Schädigung der Stickoxid-Oxidationseinheit verhindern lässt.The device according to the invention advantageously comprises a nitrogen oxide oxidation unit, which in the exhaust gas stream increasingly generates nitrogen dioxide (N0 2 ) from nitrogen monoxide (NO) and oxygen (0 2 ). The reverse process takes place in the downstream particle filter and the oxygen atom that has become clean burns the carbon of the soot even at lower exhaust gas temperatures, so that an even more reliable particle filter regeneration is guaranteed. However, in the case of a diesel internal combustion engine, it should be noted that comparatively low-sulfur diesel fuel is used, as a result of which permanent damage to the nitrogen oxide oxidation unit can be prevented.
Vorzugsweise umfasst die Vorrichtung einen beschichteten Partikelfilter, was eine weitere Absenkung der unteren Rußoxidationstemperatur gewährleistet . Die Regeneration an .einer katalytisch beschichteten Wand verläuft vergleichsweise langsam, so dass vorteilhafterweise die vollständige Umsetzung der entsprechenden Substanzen erfolgt .The device preferably comprises a coated particle filter, which ensures a further lowering of the lower soot oxidation temperature. The regeneration on a catalytically coated wall proceeds comparatively slowly, so that the corresponding substances are advantageously completely converted.
In einer besonderen Weiterbildung der Erfindung umfasst: die Vorrichtung eine HeizVorrichtung. Beispielsweise wird mittels einer elektrischen Beheizung eine sichere Partikelfilterregeneration auch unter schwierigsten Betriebsbedingungen, z.B. beim Kaltstart, bei Schubabschaltung/ usw. gewährleistet. Außerdem kann de-«-: katalytische Brenner vergleichsweise schnell auf eine optimale Betriebstemperatur gebracht werden.In a special development of the invention, the device comprises a heating device. For example, a reliable particle filter regeneration is ensured by means of an electric heater even under the most difficult operating conditions, for example during a cold start, with overrun fuel cutoff / etc. In addition, de - «-: catalytic burners can be brought to an optimal operating temperature comparatively quickly.
Die vorstehend beschriebene Erfindung gewährleistet eine sichere Partikelfilterregeneration auch unter schwierigsten Verhältnissen, wie sie bei Brennkraftmaschinen von Fahrzeugen anzutreffen sind, insbesondere bei schnellen Lastwechseln, unter KaltStartbedingungen, bei Schubabschaltung oder beim Betrieb mit unterschiedlichen Drehzahlen.The invention described above ensures safe particle filter regeneration even under the most difficult conditions, such as those found in internal combustion engines of vehicles, in particular when there are rapid load changes, under cold start conditions, in overrun fuel cutoff or when operating at different speeds.
Ausführungsbeispielembodiment
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird anhand der Figuren nachfolgend näher erläutert .An embodiment of the invention is shown in the drawing and is explained in more detail below with reference to the figures.
Im Einzelnen zeigenShow in detail
Fig. 1 eine schematische Darstellung einer erfindungsgemäßen Vorrichtung zur Abgasbehandlung,1 is a schematic representation of a device for exhaust gas treatment according to the invention,
Fig. 2 eine schematische Darstellung einer Weiterbildung der erfindungsgemäßen Vorrichtung mit einer Stickoxid- Oxidationseinheit und einer •HeizVorrichtung undFig. 2 is a schematic representation of a development of the device according to the invention with a nitrogen oxide oxidation unit and a • heating device and
Fig. 3 eine schematische Darstellung einer zweiten Weiterbildung der erfindungsgemäßen Vorrichtung mit einem beschichteten Partikelfilter.Fig. 3 is a schematic representation of a second development of the device according to the invention with a coated particle filter.
Figur 1 zeigt eine Vorrichtung 1 zur Abgasbehandlung, wobei Abgas 2 (mit einer Temperatur von ca. 200°C) auf einen katalytischen Brenner 3 trifft und anschließend einen Partikelfilter 4 durchströmt. Vor dem katalytischen Brenner 3 wird ,mittels einer KraftstoffZumessvorrichtung 5 Kraftstoff zerstreut, so dass das Abgas 2 im katalytischen Brenner 3 aufgrund der Oxidation von Kraftstoff (HC) zu Wasser (H20) und Kohlendioxid (C02) und der hierdurch freigesetzten Wärme auf ca. 600°C aufgeheizt wird. Bei diesen Abgastemperaturen reagiert im Partikelfilter 4 der Kohlenstoff (C) des Dieselrußes mit dem im Abgas 2 vorhandenen .restlichen Sauerstoff (Oa) , wobei sich dieser zu Kohlendioxid (C02) verbindet. Hierbei wird Kraftstoff (HC) der Vorrichtung 1 zugeführt, beispielsweise nach Erreichen eines vorgegebenen Abgasgegendrucks, und solange dosiert im Abgasstrom zerstreut, bis der Partikelfilter 4 freigebrannt ist, wobei auch das Ende der Zuführung druckgesteuert erfolgen kann.Figure 1 shows a device 1 for exhaust gas treatment, exhaust gas 2 (with a temperature of about 200 ° C) meets a catalytic burner 3 and then one Particulate filter 4 flows through. Is scattered 5 fuel by a fuel metering device prior to the catalytic burner 3 so that the exhaust gas 2 in the catalytic burner 3 due to the oxidation of fuel (HC) to water (H 2 0) and carbon dioxide (C0 2) and the thereby liberated heat to approx. 600 ° C is heated. At these exhaust gas temperatures, the carbon (C) of the diesel soot reacts in the particle filter 4 with the residual oxygen (O a ) present in the exhaust gas 2, which combines to form carbon dioxide (C0 2 ). In this case, fuel (HC) is supplied to the device 1, for example after a predetermined exhaust gas back pressure has been reached, and is metered into the exhaust gas stream until the particle filter 4 has burned free, and the end of the supply can also be pressure-controlled.
In Figur 2 ist eine Weiterbildung der Vorrichtung 1 dargestellt, wobei im Vergleich mit der Vorrichtung aus Figur 1 zusätzlich eine HeizVorrichtung 6 am katalytischen Brenner 3 und eine Stickoxid-Oxidationseinheit 7 zwischen dem katalytischen Brenner 3 und dem Partikelfilter 4 angeordnet ist. Für bestimmte Betriebsbedingungen des Motors eines Fahrzeugs, wie beispielsweise beim Kaltstart oder bei Schubabschaltung, kann eine zusätzliche Aufheizung des Abgases 2 notwendig werden. So wird mittels der Heizvorrichtung 6, die beispielsweise durch die fahrzeuginternen elektrischen Quellen versorgt wird, wie Batterie oder Lichtmaschine, eine sichere Partikelfilterregeneration auch unter schwierigen Betriebsbedingungen gewährleistet. Weiterhin kann mittels der Heizvorrichtung 6 der katalytische Brenner 3 bei Bedarf gezielt beheizt werden, so dass eine optimale Oxidation des zugeführten Kraftstoffs gewährleistet wird.FIG. 2 shows a further development of the device 1, a heating device 6 on the catalytic burner 3 and a nitrogen oxide oxidation unit 7 being additionally arranged between the catalytic burner 3 and the particle filter 4 in comparison with the device from FIG. Additional heating of the exhaust gas 2 may be necessary for certain operating conditions of the engine of a vehicle, such as, for example, during a cold start or during overrun fuel cutoff. Thus, by means of the heating device 6, which is supplied, for example, by the in-vehicle electrical sources, such as the battery or alternator, reliable particle filter regeneration is ensured even under difficult operating conditions. Furthermore, the catalytic burner 3 can be heated selectively by means of the heating device 6, so that an optimal oxidation of the supplied fuel is ensured.
Mittels der Stickoxid-Oxidationseinheit 7 wird Stickstoffmonoxid (NO) des Abgases 2 zu Stickstoffdioxid (NO.,) oxidiert. Es erfolgt vorteilhafterweise eine kontinuierliche Verbrennung der Rußrückstände imNitrogen monoxide (NO) of the exhaust gas 2 is oxidized to nitrogen dioxide (NO.,) By means of the nitrogen oxide oxidation unit 7. There is advantageously a continuous combustion of the soot residues in the
Partikelfilter 4 ab einer Ahgastemperattir von ca. 250° C. Der katalytische Brenner wird nur zugeschaltet, wenn dieseParticulate filter 4 from an Ahgas temperature of approx. 250 ° C. The catalytic burner is only switched on if this
Temperatur über einen längeren Zeitraum hinweg nicht erreicht wurde.Temperature has not been reached for a long period of time.
Das Ausführungsbeispiel der Fig. 3 umfasst im Vergleich mit dem Ausführungsbeispiel der Fig. 1 statt des Partikelfilters 4 einen beschichteten Partikelfilter 8. Der beschichtete Partikelfilter 8 fasst hierbei die Stickoxid- Oxidationseinheit 7 und den Partikelfilter 4 aus Fig. 2 in einem Bauteil zusammen, so dass im beschichteten Partikelfilter 8 Stickstoffmonoxid (NO) zu Stickstoffdioxid (N02) oxidiert wird, das anschließend den Ruß gemäß der nachfolgenden Reaktionsgleichung oxidiert 2NO + C + 02 = 2H02 + C => 2N0 + C02. Eine weitere Stickoxid-Behandlungj kann bei Bedarf nachgeschaltet werden. Vorteilhafterweise senkt die katalytische Beschichtung außerdem die für die direkte Oxidation von Ruß erforderliche Temperatur.In comparison with the embodiment of FIG. 1, the exemplary embodiment of FIG. 1 comprises a coated particle filter 8 instead of the particle filter 4. The coated particle filter 8 combines the nitrogen oxide oxidation unit 7 and the particle filter 4 from FIG. 2 in one component, see above that in the coated particle filter 8 nitrogen monoxide (NO) is oxidized to nitrogen dioxide (N0 2 ), which then oxidizes the soot according to the following reaction equation 2NO + C + 0 2 = 2H0 2 + C => 2N0 + C0 2 . Another nitric oxide treatment can be added afterwards if necessary. The catalytic coating advantageously also lowers the temperature required for the direct oxidation of soot.
Der Kraftstoff für den katalytischen Brenner 3 kann bei erfindungsgemäßen Abgasfiltersystemen sowohl bevorzugt gasförmig als auch flüssig zugeführt werden. Hierbei kann die KraftstoffZuführung sowohl periodisch als auch kontinuierlich erfolgen. In the exhaust gas filter systems according to the invention, the fuel for the catalytic burner 3 can be supplied both preferably in gaseous form and in liquid form. The fuel supply can take place both periodically and continuously.
Bezugszeichenliste :Reference symbol list:
1 Vorrichtung zur Abgasbehandluixg1 device for exhaust gas treatment
2 Abgas2 exhaust gas
3 katalytischer Brenner3 catalytic burners
4 Partikelfilter4 particle filters
5 KraftstoffZumessvorrichtung5 Fuel metering device
6 Heizvorrichtung6 heater
7 Stickoxid-Oxidationseinheit7 nitrogen oxide oxidation unit
8 beschichteter Partikelfilter 8 coated particle filter

Claims

Ansprüche: Expectations:
1. Vorrichtung (1) zur Abgasbehandlung einer Brennkraftmaschine, insbesondere Dieselbrennkraftmaschine, mit einem Partikelfilter (4) , dadurch gekennzeichnet,- dass die Vorrichtung einen katalytischen Brenner (3) umfasst, wobei der Brenner (3) zwischen der Brennkraftmaschine und dem Partikelfilter (4) angeordnet ist.1. Device (1) for exhaust gas treatment of an internal combustion engine, in particular a diesel internal combustion engine, with a particle filter (4), characterized in that the device comprises a catalytic burner (3), the burner (3) between the internal combustion engine and the particle filter (4 ) is arranged.
2. Vorrichtung (1) nach Anspruch 1, dadurch gekennzeichnet, dass zwischen der Brennkraftmaschine und dem Brenner (3) eine Kraftstoffzumessvorrichtung (5) angeordnet ist.2. Device (1) according to claim 1, characterized in that a fuel metering device (5) is arranged between the internal combustion engine and the burner (3).
3. Vorrichtung (1) nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass die Kraftstoffzumessvorrichtung (5) eine KraftstoffZerstreuungseinheit umfasst.3. Device (1) according to one of the preceding claims, characterized in that the fuel metering device (5) comprises a fuel dispersing unit.
4. Vorrichtung (1) nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass eine Steuerung der Kraftstoffzumessvorrichtung (5) vorgesehen ist.4. Device (1) according to one of the preceding claims, characterized in that a control of the fuel metering device (5) is provided.
5. Vorrichtung (1) nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass die Vorrichtung (1) eine Stickoxid-Oxidationseinheit (7) umfasst.5. Device (1) according to one of the preceding claims, characterized in that the device (1) comprises a nitrogen oxide oxidation unit (7).
6. Vorrichtung (1) nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass die Vorrichtung (1) einen beschichteten Partikelfilter (8) umfasst.6. Device (1) according to one of the preceding claims, characterized in that the device (1) comprises a coated particle filter (8).
7. Vorrichtung (1) nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass die Vorrichtung (1) eine Heizvorrichtung (6) umfasst.7. Device (1) according to one of the preceding claims, characterized in that the device (1) comprises a heating device (6).
8. Fahrzeug, dadurch gekennzeichnet, dass eine Vorrichtung (1) nach einem der vorgenannten Ansprüche vorgesehen ist. 8. Vehicle, characterized in that a device (1) is provided according to one of the preceding claims.
9. Verfahren zur Abgasbehandlung einer Brennkraftmaschine, insbesondere einer Dieselbrennkraftmaschine, mit einem Partikelfilter (4) , dadurch gekennzeichnet, dass eine Vorrichtung (1) nach einem der vorgenannten Ansprüche verwendet wird. 9. A method for exhaust gas treatment of an internal combustion engine, in particular a diesel internal combustion engine, with a particle filter (4), characterized in that a device (1) according to one of the preceding claims is used.
PCT/DE2001/001806 2000-05-17 2001-05-11 Device for treating exhaust gases WO2001088346A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP01947140A EP1287238A1 (en) 2000-05-17 2001-05-11 Device for treating exhaust gases
JP2001584717A JP2003533626A (en) 2000-05-17 2001-05-11 Equipment for treating exhaust gas
US10/276,468 US20040013579A1 (en) 2000-05-17 2001-05-11 Device for treating exhaust gases

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10024254.5 2000-05-17
DE10024254A DE10024254A1 (en) 2000-05-17 2000-05-17 Exhaust gas treatment device

Publications (1)

Publication Number Publication Date
WO2001088346A1 true WO2001088346A1 (en) 2001-11-22

Family

ID=7642440

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/001806 WO2001088346A1 (en) 2000-05-17 2001-05-11 Device for treating exhaust gases

Country Status (5)

Country Link
US (1) US20040013579A1 (en)
EP (1) EP1287238A1 (en)
JP (1) JP2003533626A (en)
DE (1) DE10024254A1 (en)
WO (1) WO2001088346A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1517011A3 (en) * 2003-09-22 2005-12-14 J. Eberspächer GmbH & Co. KG Exhaust gas apparatus with particle filter, heater arrangement and method of regeneration
DE102006039882B3 (en) * 2006-08-25 2007-12-20 Siemens Ag Injection system for e.g. diesel internal-combustion engine, has return pipe arranged downstream of high-pressure pump and upstream of fuel tank for recycling fuel from high-pressure pump and/or injector into fuel tank
EP2154345A3 (en) * 2008-08-12 2016-04-27 MAN Truck & Bus AG Method and device for regenerating a particulate filter built into the exhaust gas line of a combustion engine

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4052268B2 (en) * 2004-03-11 2008-02-27 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
JP4044908B2 (en) * 2004-03-11 2008-02-06 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
JP2006274838A (en) 2005-03-28 2006-10-12 Toyota Motor Corp Exhaust gas purifying system of internal combustion engine
US20060236680A1 (en) * 2005-04-26 2006-10-26 Wenzhong Zhang Method for regenerating a diesel particulate filter
US7481048B2 (en) * 2005-06-30 2009-01-27 Caterpillar Inc. Regeneration assembly
US7406822B2 (en) * 2005-06-30 2008-08-05 Caterpillar Inc. Particulate trap regeneration system and control strategy
US20070158466A1 (en) * 2005-12-29 2007-07-12 Harmon Michael P Nozzle assembly
US7862640B2 (en) 2006-03-21 2011-01-04 Donaldson Company, Inc. Low temperature diesel particulate matter reduction system
US20070235556A1 (en) * 2006-03-31 2007-10-11 Harmon Michael P Nozzle assembly
US20070228191A1 (en) * 2006-03-31 2007-10-04 Caterpillar Inc. Cooled nozzle assembly for urea/water injection
CN102105672B (en) * 2008-07-25 2013-08-14 丰田自动车株式会社 Exhaust cleaner for internal combustion engine
DE102008038721A1 (en) * 2008-08-12 2010-02-18 Man Nutzfahrzeuge Ag Method and device for the regeneration of a particulate filter arranged in the exhaust tract of an internal combustion engine
JP2013535603A (en) 2010-07-02 2013-09-12 マック トラックス インコーポレイテッド Diesel engine, exhaust aftertreatment system, and exhaust gas treatment method for diesel engine
DE102010038865A1 (en) 2010-08-04 2012-02-09 Robert Bosch Gmbh Burner with stable atomization at low back pressure
DE102010039216A1 (en) 2010-08-11 2012-02-16 Robert Bosch Gmbh Burner sleeve with glow plug function

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5340548A (en) * 1990-10-08 1994-08-23 Kabushiki Kaisha Riken Exhaust gas cleaner and method of cleaning exhaust gas
JPH08338229A (en) * 1995-06-15 1996-12-24 Toyota Motor Corp Exhaust emission control device for diesel engine
JPH09222009A (en) * 1996-02-15 1997-08-26 Nippon Soken Inc Exhaust particulate purifying device for internal combustion engine
EP0835684A2 (en) * 1996-10-11 1998-04-15 Johnson Matthey Public Limited Company Emission control

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19533355A1 (en) * 1995-09-08 1997-03-13 Wilfried Faerber Treating exhaust gases containing e.g. soot particles
DE69624890T2 (en) * 1995-09-25 2003-03-27 Nippon Oil Co., Ltd. Filter for separating soot particles from exhaust gas and device for using the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5340548A (en) * 1990-10-08 1994-08-23 Kabushiki Kaisha Riken Exhaust gas cleaner and method of cleaning exhaust gas
JPH08338229A (en) * 1995-06-15 1996-12-24 Toyota Motor Corp Exhaust emission control device for diesel engine
JPH09222009A (en) * 1996-02-15 1997-08-26 Nippon Soken Inc Exhaust particulate purifying device for internal combustion engine
EP0835684A2 (en) * 1996-10-11 1998-04-15 Johnson Matthey Public Limited Company Emission control

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 04 30 April 1997 (1997-04-30) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 12 25 December 1997 (1997-12-25) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1517011A3 (en) * 2003-09-22 2005-12-14 J. Eberspächer GmbH & Co. KG Exhaust gas apparatus with particle filter, heater arrangement and method of regeneration
DE102006039882B3 (en) * 2006-08-25 2007-12-20 Siemens Ag Injection system for e.g. diesel internal-combustion engine, has return pipe arranged downstream of high-pressure pump and upstream of fuel tank for recycling fuel from high-pressure pump and/or injector into fuel tank
EP2154345A3 (en) * 2008-08-12 2016-04-27 MAN Truck & Bus AG Method and device for regenerating a particulate filter built into the exhaust gas line of a combustion engine

Also Published As

Publication number Publication date
JP2003533626A (en) 2003-11-11
US20040013579A1 (en) 2004-01-22
EP1287238A1 (en) 2003-03-05
DE10024254A1 (en) 2001-12-06

Similar Documents

Publication Publication Date Title
WO2001088346A1 (en) Device for treating exhaust gases
DE102015212514B4 (en) Method for exhaust gas aftertreatment and device for cleaning the exhaust gas of an internal combustion engine
DE10256769B4 (en) Motor vehicle with a diesel drive motor
DE102016110632B4 (en) Process for regenerating a particulate filter
DE102008030307A1 (en) Catalyst arrangement for purifying exhaust gas flow of internal combustion engine in motor vehicle, has electrical heater for heating catalyst and/or exhaust gas flow, and another heater for heating another catalyst and/or exhaust gas flow
EP2166204A1 (en) Flame glow plug
DE19855092B4 (en) Device and method for cleaning the exhaust gas of an internal combustion engine
EP1180585B1 (en) Method and device for catalytic after treating the exhaust gas of an internal combustion engine
DE10204073A1 (en) Exhaust system and method for regeneration of a particle filter
DE10361791A1 (en) Exhaust gas cleaning device regenerating method for e.g. Otto engine, involves exhibiting catalyst by device, and pressuring filter with secondary air, when catalyst is desulphurized with hypostoichiometric exhaust gas
DE102005025455B4 (en) Apparatus and method for purifying exhaust gases of an internal combustion engine
DE10137050A1 (en) Treatment of exhaust gas from an internal combustion engine, especially a Diesel engine, involves using a particle filter that can be regenerated without reducing suction zone pressure or engine specific power
EP2960449B1 (en) Method for operating an exhaust gas burner
DE102014103814B4 (en) Mobile heating device operated with liquid fuel
EP1026380B1 (en) Combustion engine with a supply device for a combustion medium
EP1180584A1 (en) Method and device for reduction of emissions during warming up of a direct injection internal combustion engine
DE102008002469A1 (en) Method and device for exhaust gas purification
WO1999017005A1 (en) Method and device for cleaning exhaust gases in a combustion system
DE10361220B4 (en) Method of regenerating a particulate filter
DE102019008964A1 (en) Exhaust system for an internal combustion engine of a motor vehicle, in particular a motor vehicle
EP1348838A1 (en) Exhaust gas purification apparatus and method for regeneration of a particulate filter
DE102019211114A1 (en) Exhaust aftertreatment system and method for exhaust aftertreatment of an internal combustion engine
DE19638802A1 (en) Improving the cold-start behaviour of automobile catalysts
EP1451454B1 (en) Method for operating an internal combustion engine and internal combustion engine
DE102019006494B4 (en) Exhaust system for an internal combustion engine of a motor vehicle, drive device for a motor vehicle and motor vehicle

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2001947140

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 2001947140

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 10276468

Country of ref document: US

WWW Wipo information: withdrawn in national office

Ref document number: 2001947140

Country of ref document: EP