EP1332277B1 - Method for cleaning a particle filter - Google Patents
Method for cleaning a particle filter Download PDFInfo
- Publication number
- EP1332277B1 EP1332277B1 EP01993748A EP01993748A EP1332277B1 EP 1332277 B1 EP1332277 B1 EP 1332277B1 EP 01993748 A EP01993748 A EP 01993748A EP 01993748 A EP01993748 A EP 01993748A EP 1332277 B1 EP1332277 B1 EP 1332277B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter material
- liquid
- cleaning
- internal combustion
- combustion engine
- 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.)
- Expired - Lifetime
Links
Images
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
- F01N3/0233—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 periodically cleaning filter by blowing a gas through the filter in a direction opposite to exhaust flow, e.g. exposing filter to engine air intake
-
- 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
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/30—Exhaust treatment
Definitions
- the invention relates to a method for cleaning a particulate filter in the exhaust system of an internal combustion engine, in particular a self-igniting internal combustion engine, wherein the particulate filter is a filter housing has, in the exhaust gas flow through the filter material is used, wherein excreted from the exhaust gas on the filter material (Soot) particles and ash adhere and the If necessary, incurred ashes by means of the filter material conductive liquid can be washed out.
- the filter material Soot
- the cleaning takes place in such a way that first the filter material by closing the drain for the aqueous solution is completely flooded, then wait until the ash has separated from the filter material and finally by opening the drain the aqueous solution together with the dissolved one Ash is removed from the filter material.
- the filter material is dried with compressed air.
- the invention is based on the object, a method for cleaning specify a particulate filter of inorganic residues, that is effective and easy to apply.
- the filter material alternately subjected to pressure and high flow rate becomes.
- the ashes and also at least partially the (soot) particles much more effective, namely faster, more complete and gentler for the filter material washed out of this than was previously possible.
- the ashes originated can be due to chemical reactions originated from stored in the filter material but also within the internal combustion engine through reactions formed by substances contained in the fuel and lubricating oil have been.
- the filter material with subjected to a two-phase flow of the liquid. The liquid So it is in its liquid phase and its gaseous phase passed through the filter material.
- the setting the gaseous phase may, for example, be in the form that after heating the liquid to the area of Boiling point, a part of the liquid is removed and, for example in a separate container or container part in its vapor state is transferred.
- the filter material alternately from a gas and the liquid flows through.
- Gas water vapor, air or exhaust gas during the cleaning process running internal combustion engine used.
- gases can be used, but here have the previously specifically mentioned gases because of their availability. Both Variants are therefore easily applicable and the particulate filter In particular, does not need to be removed from the exhaust system become.
- the tap water Wash-active and especially environmentally friendly substances added. This can be done by creating a corresponding mixture in a corresponding storage container or else by metered Add while passing the tap water through the filter material done.
- the temperature of Liquid during exposure to the filter material to approx. 60 set to 100 ° C.
- This is the setting of the temperature in particular as a function of the current temperature in the filter material. For example, is the temperature in the filter material before or at the beginning of the cleaning process higher than 100 ° C, then the liquid at a low temperature (for example 60 ° C) introduced for cooling the filter material.
- a temperature of less than 100 ° C on the liquid can be introduced in vapor form into the filter material to be condensed within the filter material to produce the favorable for the cleaning process liquid phase.
- the fluctuations of pressure and Flow rate by pulsation of the gas and / or generated by pulsating introduction of the liquid can For example, by clocked actuated valves in the or the supply lines or by appropriately clocked actuated Pumps or compressors done.
- the liquid and / or the gas passed in countercurrent to the exhaust stream through the filter material. This is the preferred embodiment, but also an equal directed flow direction is possible.
- the exhaust gases of the internal combustion engine likewise through the cleaning opening upstream of the particle filter can escape.
- This training is preferred during a workshop cleaning process in the installed state carried out. It is prevented by this training that Water or ash sludge in the internal combustion engine or up to sensitive sensors in the exhaust system. And that's it conceivable, the exhaust gas in this process as the gaseous substance to use the cleaning combination.
- the washed ash in a downstream separator for example in a liquid separator excreted from the liquid and collected.
- the liquid thus stands at least for several wash-outs available while the ashes from the liquid separator is removed and disposed of.
- the cleaning takes place in Framework of a workshop stay or during normal operation or an operational interruption of the internal combustion engine on site.
- the single figure shows a particulate filter housing 1, in which the filter material 2 is used.
- the filter housing 1 is circular cylindrical formed and has annular end pieces 3a, 3b. In these End pieces 3a, 3b open an exhaust gas supply line 4a and an exhaust gas outlet 4b.
- the exhaust gas supply pipe 4a is suitable connected to the internal combustion engine, while the exhaust gas discharge 4b opens into the environment.
- the exhaust gas supply line 4a and the exhaust pipe 4b even more muffler and / or cleaning equipment or exhaust bypasses Be used or exhaust short circuits.
- the filter material 2 are during operation of the internal combustion engine (Soot) particles and ash filtered out of the exhaust. These particles consist mainly of soot and organic Residues. For continuous or discontinuous removal These substances from particulate filters are different methods (so-called regeneration method) available, the time or Operationally performed. For example, the in the filter material 2 deposited particles by burning or chemical processes are at least largely converted to ashes become. Contain the particles emitted by internal combustion engines but also inorganic constituents, mainly oxidation products organometallic lubricating oil and fuel additives as well Wear products. These substances (ashes) are by conventional Procedure not to eliminate. These ashes are washed out of the filter material 2 removed.
- Soot internal combustion engine
- the filter material flows through at least with a liquid which alternately with Pressure and high flow rate through the filter material 2 is headed.
- at least two in the end pieces 3a, 3b further connecting pieces 5a, 5b arranged through which the liquid introduced into the filter housing 1 and discharged again. there the liquid is in countercurrent to the exhaust stream or with the exhaust gas flow through the filter housing 1 passed.
- a check valve 6 which then closes automatically or manually.
- the End pieces 3a, 3b can still further connection piece 7a, 7b inserted be through which the liquid in a different phase state is directed.
- phase state liquid alternately to the in the first phase state liquid through the connecting piece 5a, 5b in and out.
- the liquid is normal Water to which optionally added washing-active substances be, the temperature of the liquid during the action on the filter material 2 preferably controlled in dependence from the filter temperature is 60 to 100 degrees Celsius.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Reinigung eines Partikelfilters im Abgassystem einer Brennkraftmaschine, insbesondere einer selbstzündenden Brennkraftmaschine, wobei das Partikelfilter ein Filtergehäuse aufweist, in das vom Abgas durchströmbares Filtermaterial eingesetzt ist, wobei an dem Filtermaterial aus dem Abgas ausgeschiedene (Ruß)-Partikel und Aschen anhaften und wobei die entstandenen Aschen im Bedarfsfall mittels durch das Filtermaterial leitbare Flüssigkeit auswaschbar sind.The invention relates to a method for cleaning a particulate filter in the exhaust system of an internal combustion engine, in particular a self-igniting internal combustion engine, wherein the particulate filter is a filter housing has, in the exhaust gas flow through the filter material is used, wherein excreted from the exhaust gas on the filter material (Soot) particles and ash adhere and the If necessary, incurred ashes by means of the filter material conductive liquid can be washed out.
Ein derartiges Verfahren ist aus der DE 43 13 132 C2 bekannt. Der in diesem Dokument beschriebene Partikelfilter im Abgassystem eines Dieselmotors wird gereinigt, indem zunächst die in dem Filtermaterial abgesetzten Rußpartikel abgebrannt werden und anschließend das Filtermaterial mit einer Flüssigkeit, die insbesondere ein wässriges Lösungsmittel mit Zusätzen ist, gespült wird. Dabei erfolgt die Spülung im Gegenstrom zu dem Abgasstrom. Hierzu wird die wässrige Lösung entweder von einer Pumpe kontinuierlich gefördert oder aus einem gegenüber dem Partikelfilter geodätisch höher liegenden Flüssigkeitsreservoir entnommen. Die Reinigung erfolgt derart, dass zunächst das Filtermaterial durch Verschließen des Ablaufs für die wässrige Lösung vollständig geflutet wird, dann gewartet wird, bis sich die Asche aus dem Filtermaterial gelöst hat und schließlich durch Öffnen des Abflusses die wässrige Lösung mitsamt der gelösten Asche aus dem Filtermaterial entfernt wird. Abschließend kann das Filtermaterial mit Druckluft getrocknet werden. Such a method is known from DE 43 13 132 C2. The in Particulate filter described in this document in the exhaust system of Diesel engine is cleaned by first placing in the filter material be burned off settled soot particles and then the Filter material with a liquid, in particular an aqueous Solvent with additives is rinsed. The flushing takes place in countercurrent to the exhaust stream. For this purpose, the aqueous Solution either continuously pumped by a pump or off a geodetically higher compared to the particle filter liquid reservoir taken. The cleaning takes place in such a way that first the filter material by closing the drain for the aqueous solution is completely flooded, then wait until the ash has separated from the filter material and finally by opening the drain the aqueous solution together with the dissolved one Ash is removed from the filter material. In conclusion, can the filter material is dried with compressed air.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Reinigung eines Partikelfilters von anorganischen Reststoffen anzugeben, das effektiv und einfach anwendbar ist.The invention is based on the object, a method for cleaning specify a particulate filter of inorganic residues, that is effective and easy to apply.
Diese Aufgabe wird dadurch gelöst, dass das Filtermaterial abwechselnd mit Druck und hoher Strömungsgeschwindigkeit beaufschlagt wird. Durch dieses Verfahren werden die Aschen und auch zumindest teilweise die (Ruß)-Partikel wesentlich effektiver, nämlich schneller, vollständiger und schonender für das Filtermaterial aus diesem ausgewaschen als dies bisher möglich war. Hierbei ist es für das erfindungsgemäße Verfahren unerheblich, wie und wo die Aschen entstanden sind. Selbstverständlich können diese durch chemische Reaktionen von in dem Filtermaterial eingelagerten Stoffen entstanden sein, aber ebenso innerhalb der Brennkraftmaschine durch Reaktionen von im Brennstoff und im Schmieröl enthaltenen Stoffen gebildet worden sein. In einer ersten Variante wird das Filtermaterial mit einer Zweiphasenströmung der Flüssigkeit beaufschlagt. Die Flüssigkeit wird also in ihrer flüssigen Phase und ihrer gasförmigen Phase durch das Filtermaterial geleitet. Da - wie später ausgeführt wird - die Flüssigkeit ohnehin vorteilhaft bis in den Bereich des Siedepunktes erhitzt wird, stellt die Einstellung der gasförmigen und der flüssigen Phase der Flüssigkeit keinen erheblichen Aufwand dar. Die Einstellung der gasförmigen Phase kann beispielsweise in der Form geschehen, dass nach der Erhitzung der Flüssigkeit bis in den Bereich des Siedepunktes ein Teil der Flüssigkeit entnommen wird und beispielsweise in einem separaten Behälter oder Behälterteil in dessen dampfförmigen Zustand überführt wird. In einer zweiten Variante wird das Filtermaterial alternierend von einem Gas und der Flüssigkeit durchströmt. Hierbei wird in weiterer Ausgestaltung vorteilhaft als Gas Wasserdampf, Luft oder Abgas der beim Reinigungsvorgang laufenden Brennkraftmaschine genutzt. Selbstverständlich sind hier auch andere Gase verwendbar, hier haben sich aber die zuvor konkret genannten Gase wegen ihrer Verfügbarkeit bewährt. Beide Varianten sind folglich einfach anwendbar und der Partikelfilter braucht insbesondere nicht aus dem Abgasstrang ausgebaut zu werden.This object is achieved in that the filter material alternately subjected to pressure and high flow rate becomes. Through this process, the ashes and also at least partially the (soot) particles much more effective, namely faster, more complete and gentler for the filter material washed out of this than was previously possible. Here it is for the invention It does not matter how and where the ashes originated are. Of course, these can be due to chemical reactions originated from stored in the filter material but also within the internal combustion engine through reactions formed by substances contained in the fuel and lubricating oil have been. In a first variant, the filter material with subjected to a two-phase flow of the liquid. The liquid So it is in its liquid phase and its gaseous phase passed through the filter material. Since - as will be explained later - the Liquid anyway advantageous up in the range of the boiling point is heated, adjusts the setting of the gaseous and the liquid Phase of the liquid is not a significant effort. The setting the gaseous phase may, for example, be in the form that after heating the liquid to the area of Boiling point, a part of the liquid is removed and, for example in a separate container or container part in its vapor state is transferred. In a second variant is the filter material alternately from a gas and the liquid flows through. This is advantageous in another embodiment Gas water vapor, air or exhaust gas during the cleaning process running internal combustion engine used. Of course, here are Other gases can be used, but here have the previously specifically mentioned gases because of their availability. Both Variants are therefore easily applicable and the particulate filter In particular, does not need to be removed from the exhaust system become.
In Weiterbildung der Erfindung wird als Flüssigkeit Leitungswasser benutzt. Soweit es erforderlich ist, werden dem Leitungswasser waschaktive und insbesondere umweltverträgliche Substanzen zugegeben. Dies kann durch Erzeugung einer entsprechenden Mischung in einem entsprechenden Vorratsbehälter oder aber auch durch dosierte Zugabe während des Durchleitens des Leitungswassers durch das Filtermaterial erfolgen.In a further development of the invention is as a liquid tap water used. As far as it is necessary, the tap water Wash-active and especially environmentally friendly substances added. This can be done by creating a corresponding mixture in a corresponding storage container or else by metered Add while passing the tap water through the filter material done.
In weiterer Ausgestaltung der Erfindung wird die Temperatur der Flüssigkeit während der Einwirkung auf das Filtermaterial auf ca. 60 bis 100°C eingestellt. Hierbei erfolgt die Einstellung der Temperatur insbesondere in Abhängigkeit der aktuellen Temperatur in dem Filtermaterial. Ist beispielsweise die Temperatur in dem Filtermaterial vor bzw. zu Beginn des Reinigungsvorgangs höher als 100°C, so wird die Flüssigkeit mit einer geringen Temperatur (beispielsweise 60°C) zur Kühlung des Filtermaterials eingebracht. Weist das Filtermaterial zu Beginn des Reinigungsvorgangs eine Temperatur von unter 100°C auf, kann die Flüssigkeit dampfförmig in das Filtermaterial eingebracht werden, um durch Kondensation innerhalb des Filtermaterials die für den Reinigungsvorgang günstige flüssige Phase zu erzeugen.In a further embodiment of the invention, the temperature of Liquid during exposure to the filter material to approx. 60 set to 100 ° C. This is the setting of the temperature in particular as a function of the current temperature in the filter material. For example, is the temperature in the filter material before or at the beginning of the cleaning process higher than 100 ° C, then the liquid at a low temperature (for example 60 ° C) introduced for cooling the filter material. Indicates the filter material At the beginning of the cleaning process, a temperature of less than 100 ° C on, the liquid can be introduced in vapor form into the filter material to be condensed within the filter material to produce the favorable for the cleaning process liquid phase.
In Weiterbildung der Erfindung werden die Schwankungen von Druckund Strömungsgeschwindigkeit durch Pulsation des Gases und/oder durch pulsierende Einbringung der Flüssigkeit erzeugt. Dies kann beispielsweise durch getaktet betätigte Ventile in der bzw. den Zuführungsleitungen oder aber durch entsprechend getaktet betätigte Pumpen oder Verdichter erfolgen. In development of the invention, the fluctuations of pressure and Flow rate by pulsation of the gas and / or generated by pulsating introduction of the liquid. This can For example, by clocked actuated valves in the or the supply lines or by appropriately clocked actuated Pumps or compressors done.
In Weiterbildung der Erfindung wird die Flüssigkeit und/oder das Gas in Gegenstrom zu dem Abgasstrom durch das Filtermaterial geleitet. Dies ist die bevorzugte Ausführungsform, wobei aber auch eine gleich gerichtete Strömungsrichtung möglich ist.In a further development of the invention, the liquid and / or the gas passed in countercurrent to the exhaust stream through the filter material. This is the preferred embodiment, but also an equal directed flow direction is possible.
In weiterer Ausgestaltung der Erfindung können die rückgespülten (Ruß)-Partikel zusammen mit den Reinigungsstoffen durch eine dem Partikelfilter vorgeschaltete Reinigungsöffnung austreten. Dabei ist in weiterer Ausgestaltung die Brennkraftmaschine während dieses Reinigungsvorgangs in Betrieb, wobei die Abgase der Brennkraftmaschine ebenfalls durch die dem Partikelfilter vorgeschaltete Reinigungsöffnung ausströmen können. Diese Ausbildung wird bevorzugt während eines Werkstatt-Reinigungsverfahrens im eingebauten Zustand durchgeführt. Dabei wird durch diese Ausbildung verhindert, dass Wasser oder Ascheschlamm in die Brennkraftmaschine oder bis zu empfindlichen Sensoren im Abgassystem gerät. Dabei ist es auch denkbar, das Abgas bei diesem Prozess als den gasförmigen Stoff der Reinigungskombination zu verwenden.In a further embodiment of the invention, the backwashed (Soot) particles together with the cleaning agents by a the Particle filter emerge upstream cleaning opening emerge. It is in further embodiment of the internal combustion engine during this cleaning process in operation, the exhaust gases of the internal combustion engine likewise through the cleaning opening upstream of the particle filter can escape. This training is preferred during a workshop cleaning process in the installed state carried out. It is prevented by this training that Water or ash sludge in the internal combustion engine or up to sensitive sensors in the exhaust system. And that's it conceivable, the exhaust gas in this process as the gaseous substance to use the cleaning combination.
In Weiterbildung der Erfindung wird die ausgewaschene Asche in einem nachgeschalteten Abscheider, beispielsweise in einem Flüssigkeitsabscheider aus der Flüssigkeit ausgeschieden und gesammelt. Die Flüssigkeit steht somit zumindest für mehrere Auswaschvorgänge zur Verfügung, während die Asche aus dem Flüssigkeitsabscheider entfernt und entsorgt wird.In a further development of the invention, the washed ash in a downstream separator, for example in a liquid separator excreted from the liquid and collected. The liquid thus stands at least for several wash-outs available while the ashes from the liquid separator is removed and disposed of.
Je nach Einsatz der Brennkraftmaschine und der Größe des Partikelfilters bzw. der Reinigungseinrichtung erfolgt die Reinigung im Rahmen eines Werkstattaufenthaltes oder bei normalem Betrieb oder einer Betriebsunterbrechung der Brennkraftmaschine vor Ort.Depending on the use of the internal combustion engine and the size of the particulate filter or the cleaning device, the cleaning takes place in Framework of a workshop stay or during normal operation or an operational interruption of the internal combustion engine on site.
Weitere vorteilhafte Ausgestaltungen der Erfindung sind der Zeichnungsbeschreibung zu entnehmen, in der ein in Figur dargestelltes Beispiel näher beschrieben ist. Further advantageous embodiments of the invention are the drawing description to take in the one shown in FIG Example is described in more detail.
Die einzige Figur zeigt ein Partikelfiltergehäuse 1, in das das Filtermaterial
2 eingesetzt ist. Das Filtergehäuse 1 ist kreiszylinderförmig
ausgebildet und weist kreisringförmige Endstücke 3a, 3b auf. In diese
Endstücke 3a, 3b münden eine Abgaszufuhrleitung 4a und eine Abgasableitung
4b. Die Abgaszufuhrleitung 4a ist in geeigneter Weise
mit der Brennkraftmaschine verbunden, während die Abgasableitung
4b in die Umgebung mündet. Selbstverständlich können in die Abgaszufuhrleitung
4a und die Abgasleitung 4b noch weitere Schalldämpfer
und/oder Reinigungseinrichtungen oder Abgasumleitungen
bzw. Abgaskurzschlussleitungen eingesetzt sein.The single figure shows a particulate filter housing 1, in which the filter material
2 is used. The filter housing 1 is circular cylindrical
formed and has
In dem Filtermaterial 2 werden während des Betriebs der Brennkraftmaschine
(Ruß)-Partikel und Aschen aus dem Abgas ausgefiltert.
Diese Partikel bestehen zum größten Teil aus Ruß und organischen
Reststoffen. Für die kontinuierliche oder diskontinuierliche Beseitigung
dieser Stoffe aus Partikelfiltern stehen verschiedenen Verfahren
(sogenannte Regenerationsverfahren) zur Verfügung, die zeit- oder
betriebsabhängig durchgeführt werden. Beispielsweise können die in
dem Filtermaterial 2 angelagerten Partikel durch Verbrennen oder
chemische Verfahren zumindest weitgehend in Aschen umgewandelt
werden. Die von Brennkraftmaschinen emittierten Partikel enthalten
jedoch auch anorganische Bestandteile, hauptsächlich Oxidationsprodukte
metallorganischer Schmieröl- und Kraftstoffadditive sowie
Verschleißprodukte. Diese Stoffe (Aschen) sind durch konventionelle
Verfahren nicht zu beseitigen. Diese Aschen werden durch Auswaschen
des Filtermaterials 2 entfernt. Hierzu wird das Filtermaterial
zumindest mit einer Flüssigkeit durchströmt, die abwechselnd mit
Druck und hoher Strömungsgeschwindigkeit durch das Filtermaterial
2 geleitet wird. Hierzu sind in die Endstücke 3a, 3b zumindest zwei
weitere Anschlussstutzen 5a, 5b angeordnet, durch die die Flüssigkeit
in das Filtergehäuse 1 eingeleitet und wieder abgeleitet wird. Dabei
wird die Flüssigkeit im Gegenstrom zu dem Abgasstrom oder mit
dem Abgasstrom durch das Filtergehäuse 1 geleitet. In ersten Fall
kann in die Abgaszufuhrleitung 4a eine Rückschlagklappe 6 eingesetzt
sein, die dann automatisch oder manuell betätigt schließt. In die
Endstücke 3a, 3b können noch weitere Anschlussstutzen 7a, 7b eingelassen
sein, durch die die Flüssigkeit in einem anderen Phasenzustand
geleitet wird. Es ist aber auch vorgesehen, die in einem anderen
Phasenzustand befindliche Flüssigkeit abwechselnd zu der in
dem ersten Phasenzustand befindlichen Flüssigkeit durch die Anschlussstutzen
5a, 5b ein- und abzuleiten. Die Flüssigkeit ist normalerweise
Wasser, dem gegebenenfalls waschaktive Substanzen zugefügt
werden, wobei die Temperatur der Flüssigkeit während der Einwirkung
auf das Filtermaterial 2 vorzugsweise gesteuert in Abhängigkeit
von der Filtertemperatur bei 60 bis 100 Grad Celsius liegt.In the filter material 2 are during operation of the internal combustion engine
(Soot) particles and ash filtered out of the exhaust.
These particles consist mainly of soot and organic
Residues. For continuous or discontinuous removal
These substances from particulate filters are different methods
(so-called regeneration method) available, the time or
Operationally performed. For example, the in
the filter material 2 deposited particles by burning or
chemical processes are at least largely converted to ashes
become. Contain the particles emitted by internal combustion engines
but also inorganic constituents, mainly oxidation products
organometallic lubricating oil and fuel additives as well
Wear products. These substances (ashes) are by conventional
Procedure not to eliminate. These ashes are washed out
of the filter material 2 removed. This is the filter material
flows through at least with a liquid which alternately with
Pressure and high flow rate through the filter material
2 is headed. For this purpose, at least two in the
Claims (14)
- Method for cleaning a particulate filter in the exhaust system of an internal combustion engine, in particular a compression-ignition internal combustion engine, the particulate filter having a filter housing, into which filter material through which the exhaust gas can flow is inserted, (carbon) particulates and ash which have been separated out of the exhaust gas adhering to the filter material, and it being possible for the ash to be washed out if necessary by means of liquid that can be passed through the filter material, characterized in that the filter material (2) is acted on alternately by a two-phase flow of the liquid under pressure and at a high flow velocity.
- Method for cleaning a particulate filter in the exhaust system of an internal combustion engine, in particular a compression-ignition internal combustion engine, the particulate filter having a filter housing, into which filter material through which the exhaust gas can flow is inserted, (carbon) particulates and ash which have been separated out of the exhaust gas adhering to the filter material, and it being possible for the ash to be washed out if necessary by means of liquid that can be passed through the filter material, characterized in that the filter material (2) is acted on by an alternating flow through it of a gas and the liquid under pressure and at a high flow velocity.
- Method according to Claim 2, characterized in that the gas used is steam, air or the exhaust gas from the internal combustion engine, which is still running during the cleaning operation.
- Method according one of the preceding claims, characterized in that the liquid used is tap water.
- Method according to Claim 4, characterized in that substances with a washing activity are added to the tap water.
- Method according to Claim 4 or 5, characterized in that the temperature of the liquid while it acts on the filter material (2) is from 60 to 100°C.
- Method according to one of the preceding claims, characterized in that the fluctuations in pressure and flow velocity are generated by pulsing the gas stream and/or by pulsed introduction of the liquid.
- Method according to Claim 6, characterized in that the temperature of the liquid can be set in particular as a function of the temperature in the filter material (2).
- Method according to one of the preceding claims, characterized in that the liquid and/or the gas is passed through the filter material (2) in countercurrent to the exhaust-gas stream.
- Method according to Claim 9, characterized in that the back-flushed (carbon) particulates can escape together with the cleaning substances through a cleaning opening connected upstream of the particulate filter.
- Method according to Claim 10, characterized in that the internal combustion engine is in operation during the cleaning operation, with the exhaust gases from the internal combustion engine likewise flowing out through the cleaning opening connected upstream of the particulate filter.
- Method according to one of the preceding claims, characterized in that the expelled ash is separated out of the liquid in a downstream separator and collected.
- Method according to one of the preceding claims, characterized in that the cleaning is carried out as part of maintenance work in a workshop.
- Method according to one of the preceding claims, characterized in that the cleaning takes place during normal use of the internal combustion engine under normal operation or when operation is interrupted.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10055210 | 2000-11-07 | ||
| DE10055210A DE10055210A1 (en) | 2000-11-07 | 2000-11-07 | Process for cleaning particle filter in exhaust gas system of IC engine comprises washing filter material of filter using liquid under high pressure and velocity |
| PCT/EP2001/012801 WO2002038921A1 (en) | 2000-11-07 | 2001-11-06 | Method for cleaning a particle filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1332277A1 EP1332277A1 (en) | 2003-08-06 |
| EP1332277B1 true EP1332277B1 (en) | 2005-04-13 |
Family
ID=7662479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01993748A Expired - Lifetime EP1332277B1 (en) | 2000-11-07 | 2001-11-06 | Method for cleaning a particle filter |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6926760B2 (en) |
| EP (1) | EP1332277B1 (en) |
| AT (1) | ATE293208T1 (en) |
| DE (2) | DE10055210A1 (en) |
| WO (1) | WO2002038921A1 (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4197943B2 (en) * | 2000-10-31 | 2008-12-17 | フォーレシア・システムズ・デシャップマン | Method for cleaning upstream surface of particle filter |
| EP1455059A1 (en) * | 2003-03-03 | 2004-09-08 | J. Eberspächer GmbH & Co. | Method and Device for Cleaning a Particulate Filter |
| DE10321290B4 (en) * | 2003-05-13 | 2015-05-13 | Daimler Ag | Process for cleaning a particulate filter |
| US20060117743A1 (en) * | 2004-12-03 | 2006-06-08 | Helmut Swars | Regeneratable particle filter |
| WO2006119373A2 (en) * | 2005-05-02 | 2006-11-09 | Medonyx Inc. | Wearable disinfecting gel dispenser |
| US20080035187A1 (en) * | 2006-08-14 | 2008-02-14 | Cory Andrew Brown | Fuel supply component cleaning system |
| US20080034734A1 (en) * | 2006-08-14 | 2008-02-14 | Kevin James Karkkainen | Fuel supply component cleaning system |
| US8499739B2 (en) | 2006-08-31 | 2013-08-06 | Caterpillar Inc. | Injector having tangentially oriented purge line |
| US7849682B2 (en) * | 2006-08-31 | 2010-12-14 | Caterpillar Inc | Exhaust treatment device having a fuel powered burner |
| US7721702B2 (en) * | 2006-08-31 | 2010-05-25 | Caterpillar Inc. | Spark plug having separate housing-mounted electrode |
| US20080083334A1 (en) * | 2006-10-06 | 2008-04-10 | Pronob Bardhan | Method and system for removing ash from a filter |
| GB0816310D0 (en) * | 2008-09-05 | 2008-10-15 | Mtt Technologies Ltd | Filter assembly |
| DE102008064540A1 (en) * | 2008-12-19 | 2010-06-24 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Emission control device for internal-combustion engine of motor vehicle, has particle filter and inlet for exhaust gas stream of particle filter |
| DE102009025598A1 (en) † | 2009-06-19 | 2010-12-23 | Tunap Industrie Chemie Gmbh & Co. Produktions Kg | Method and device for cleaning particulate filters in exhaust systems of internal combustion engines |
| US20120266918A1 (en) * | 2009-10-26 | 2012-10-25 | Stockforsa Invest Aktiebolag | Method for cleaning of particle filters |
| JP5087100B2 (en) * | 2010-03-26 | 2012-11-28 | ヤンマー株式会社 | Cleaning method and cleaning apparatus for particulate matter removing filter |
| US8801818B2 (en) * | 2012-05-14 | 2014-08-12 | Daimler Ag | Method and cleaning device for cleaning and checking a particle filter |
| JP5798533B2 (en) * | 2012-09-05 | 2015-10-21 | 株式会社日本自動車部品総合研究所 | Exhaust gas purification device for internal combustion engine |
| EP3221073B1 (en) | 2014-11-21 | 2020-04-22 | Renishaw Plc. | Additive manufacturing apparatus and methods |
| US10523136B2 (en) * | 2016-09-26 | 2019-12-31 | Mitsubishi Electric Corporation | Inverter device and method of controlling the same |
| CN111875092B (en) * | 2020-07-14 | 2022-03-04 | 北部湾大学 | Fishery breeding tail water treatment device |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3242652A (en) * | 1963-02-18 | 1966-03-29 | E Van Noorden Company | Ventilation system for cooking unit |
| DE2206675C3 (en) * | 1971-02-15 | 1980-02-21 | Kamakura Kanagawa Aoi Katashi (Japan) | Exhaust gas cleaning device for internal combustion engines |
| JPS555466A (en) | 1978-06-27 | 1980-01-16 | Shimizu Constr Co Ltd | Exhaust gas purifier for diesel engine |
| DE3316527A1 (en) * | 1983-05-06 | 1984-11-08 | Henkel KGaA, 4000 Düsseldorf | METHOD FOR WASHING THE FILTER ELEMENTS OF A GAS FILTER AND DEVICE FOR CARRYING OUT THE METHOD |
| JPS61192805A (en) | 1985-02-20 | 1986-08-27 | Mazda Motor Corp | Regeneration of exhaust-gas purifying filter for engine |
| DE3937809A1 (en) * | 1989-11-14 | 1991-05-16 | Schwaebische Huettenwerke Gmbh | FILTER FOR SEPARATING IMPURITIES |
| GB8927933D0 (en) * | 1989-12-11 | 1990-02-14 | Sutcliffe Speakman Plc | Low head cellular filter |
| DE4313132C2 (en) * | 1993-04-22 | 1995-04-13 | Mtu Friedrichshafen Gmbh | Process for cleaning particle filters and particle filters |
| US6149716A (en) * | 1997-10-31 | 2000-11-21 | Niro A/S | Method of cleaning a filter unit, and a filter unit for filtering gas |
| FR2794992B1 (en) * | 1999-06-17 | 2003-04-04 | Peugeot Citroen Automobiles Sa | METHOD AND DEVICE FOR CLEANING A PARTICLE FILTER AND METHOD FOR TREATING EFFLUENTS PRODUCED DURING CLEANING |
| JP2002201963A (en) * | 2000-12-28 | 2002-07-19 | Mitsubishi Heavy Ind Ltd | Filter for gas turbine air intake part and gas turbine |
| DE20117862U1 (en) * | 2001-11-06 | 2003-04-10 | DaimlerChrysler AG, 70567 Stuttgart | Diesel particulate filter and diesel engine with a diesel particulate filter |
| EP1336729A1 (en) * | 2002-02-14 | 2003-08-20 | Zeuna-Stärker Gmbh & Co Kg | Method and apparatus for removing residues from a particulate filter in an exhaust gas arrangement of a combustion engine |
| US7025811B2 (en) * | 2002-08-23 | 2006-04-11 | Cleaire Advanced Emission Controls | Apparatus for cleaning a diesel particulate filter with multiple filtration stages |
| US6835224B2 (en) * | 2003-01-03 | 2004-12-28 | General Motors Corporation | Open end diesel particulate trap |
| JP4048993B2 (en) * | 2003-04-08 | 2008-02-20 | 日産自動車株式会社 | Engine exhaust purification system |
-
2000
- 2000-11-07 DE DE10055210A patent/DE10055210A1/en not_active Withdrawn
-
2001
- 2001-11-06 DE DE50105917T patent/DE50105917D1/en not_active Expired - Lifetime
- 2001-11-06 WO PCT/EP2001/012801 patent/WO2002038921A1/en active IP Right Grant
- 2001-11-06 EP EP01993748A patent/EP1332277B1/en not_active Expired - Lifetime
- 2001-11-06 US US10/415,301 patent/US6926760B2/en not_active Expired - Fee Related
- 2001-11-06 AT AT01993748T patent/ATE293208T1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| DE10055210A1 (en) | 2002-05-08 |
| EP1332277A1 (en) | 2003-08-06 |
| ATE293208T1 (en) | 2005-04-15 |
| DE50105917D1 (en) | 2005-05-19 |
| US6926760B2 (en) | 2005-08-09 |
| US20040020193A1 (en) | 2004-02-05 |
| WO2002038921A1 (en) | 2002-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1332277B1 (en) | Method for cleaning a particle filter | |
| DE19959955C2 (en) | Device for cleaning the exhaust gases of an internal combustion engine | |
| DE4313132C2 (en) | Process for cleaning particle filters and particle filters | |
| DE10358979A1 (en) | Filter system for blow-by gases in the crankcase | |
| DE2953010T1 (en) | DEVICE FOR PURIFYING EXHAUST GAS OF DIESEL ENGINE | |
| DE102008038026A1 (en) | Method for cleaning particle filter of vehicle, involves removing particle filter from vehicle, where exhaust gas flow direction of particle filter runs from inlet end to outlet end of particle filter | |
| DE3046258A1 (en) | DEVICE AND METHOD FOR TREATING A COMBUSTIBLE SOLID PARTICLE CONTAINING HOT EXHAUST FLOW | |
| DE102005040526A1 (en) | Crankcase ventilation system | |
| EP1336729A1 (en) | Method and apparatus for removing residues from a particulate filter in an exhaust gas arrangement of a combustion engine | |
| DE19515352A1 (en) | Agglomerator to clean diesel exhaust and other waste gases | |
| DE102012221632A1 (en) | System and method for determining an exhaust system condition | |
| DE102013001319A1 (en) | Method for operating internal combustion engine, involves introducing secondary air in first operating mode of internal combustion engine only through first secondary air lines or only through second secondary air line | |
| WO2019092187A1 (en) | Exhaust gas system for a motor vehicle, motor vehicle comprising such an exhaust gas system, and method for conditioning an exhaust gas system | |
| DE102017219937B4 (en) | Method for introducing ash particles into an exhaust system of a motor vehicle | |
| DE102005060070A1 (en) | System and method for cleaning a diesel particulate filter | |
| EP1181966A1 (en) | Process and device for cleaning filters | |
| WO2019091661A1 (en) | Method for operating a particle filter | |
| DE10318784B4 (en) | Method for operating an internal combustion engine | |
| EP2716344A2 (en) | Method and apparatus for regenerating soot particle filters from diesel engines | |
| DE10321290A1 (en) | Method for cleaning a particle filter and cleaning device for a particle filter | |
| DE112015002440T5 (en) | Water outlet system and method | |
| DE3834499C2 (en) | ||
| DE102012206534A1 (en) | REGENERATION PROCESSES AND SYSTEMS FOR PARTICULATE FILTERS | |
| DE112008001111T5 (en) | Regeneration device having an air assisted fuel nozzle | |
| EP0311992B1 (en) | Method and device for soot oxidation in diesel engines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20030318 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20050413 Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20050413 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20050413 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
| REF | Corresponds to: |
Ref document number: 50105917 Country of ref document: DE Date of ref document: 20050519 Kind code of ref document: P |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: R. A. EGLI & CO. PATENTANWAELTE |
|
| REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20050613 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20050713 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20050713 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20050724 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20050913 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20051106 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051130 Ref country code: MC Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051130 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051130 |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: FD4D |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| ET | Fr: translation filed | ||
| 26N | No opposition filed |
Effective date: 20060116 |
|
| BERE | Be: lapsed |
Owner name: DEUTZ A.G. Effective date: 20051130 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20131121 Year of fee payment: 13 Ref country code: GB Payment date: 20131120 Year of fee payment: 13 Ref country code: SE Payment date: 20131121 Year of fee payment: 13 Ref country code: AT Payment date: 20131113 Year of fee payment: 13 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20131121 Year of fee payment: 13 |
|
| REG | Reference to a national code |
Ref country code: NL Ref legal event code: V1 Effective date: 20150601 |
|
| REG | Reference to a national code |
Ref country code: SE Ref legal event code: EUG Ref country code: CH Ref legal event code: PL |
|
| REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 293208 Country of ref document: AT Kind code of ref document: T Effective date: 20141106 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20141106 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141107 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141130 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141130 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141106 Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150601 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141106 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20151124 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20151119 Year of fee payment: 15 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20170731 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20161106 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20161130 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20191109 Year of fee payment: 19 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 50105917 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210601 |