DE102007037494B4 - Exhaust gas recirculation system - Google Patents
Exhaust gas recirculation system Download PDFInfo
- Publication number
- DE102007037494B4 DE102007037494B4 DE102007037494.3A DE102007037494A DE102007037494B4 DE 102007037494 B4 DE102007037494 B4 DE 102007037494B4 DE 102007037494 A DE102007037494 A DE 102007037494A DE 102007037494 B4 DE102007037494 B4 DE 102007037494B4
- Authority
- DE
- Germany
- Prior art keywords
- exhaust gas
- gas recirculation
- recirculation system
- engine
- compressor
- 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 - Fee Related
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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
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
-
- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Abgasrückführungssystem für ein Kraftfahrzeug mit einem Motor (MOT) mit Katalysator (KAT), bei dem mittels einer Membran (13) Regeneratorgase aus dem Abgas durch Unterdruck abgetrennt werden, wobei der Unterdruck durch einen Kompressor (KOM) erzeugt wird und abhängig vom Betriebszustand des Motors (MOT) der Unterdruck geregelt wird, dadurch gekennzeichnet, dass die Regeneratorgase als Kältemittel für Kühlzwecke genutzt werden.Exhaust gas recirculation system for a motor vehicle with an engine (MOT) with catalyst (KAT), in which by means of a membrane (13) regenerator gases are separated from the exhaust gas by negative pressure, wherein the negative pressure is generated by a compressor (KOM) and depending on the operating condition of the engine (MOT) the negative pressure is controlled, characterized in that the regenerator gases are used as refrigerant for cooling purposes.
Description
Die Erfindung betrifft ein Abgasrückführungssystem für ein Kraftfahrzeug mit einem Motor mit Katalysator, bei dem mittels einer Membran Regeneratorgase aus dem Abgas durch Unterdruck abgetrennt werden.The invention relates to an exhaust gas recirculation system for a motor vehicle with an engine with a catalyst, in which by means of a membrane regenerator gases are separated from the exhaust gas by negative pressure.
Ein solches Abgasrückführungssystem ist aus der deutschen Patentschrift
In der Patentanmeldung
Es ist daher die Aufgabe der Erfindung, die niedrige Temperatur des Regeneratorgases im Kraftfahrzeug weiter zu nutzen.It is therefore the object of the invention to continue to use the low temperature of the regenerator gas in the motor vehicle.
Die Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausführungsformen der Erfindung sind in den Unteransprüchen beschrieben.The object is solved by the features of claim 1. Advantageous embodiments of the invention are described in the subclaims.
In der bisher bekannten Ausführung der Regeneratgasgewinnung über eine Membran aus einem Katalysator wird der notwendige Unterdruck durch die Ansaugung des Motors aufgebracht. Bei Lastwechseln oder im Schubbetrieb, wenn die Drosselklappe des Motors schließt, bricht dieser Unterdruck zusammen. Damit wird in diesen Betriebszuständen kein Regeneratgas gewonnen. Es wird nun vorgeschlagen, den Unterdruck durch einen Kompressor zu erzeugen und den Unterdruck vom Betriebszustand des Motors abhängig zu regeln. Eine Axialkolbenpumpe ist für diese Anwendung besonders geeignet, da sie, wenn der Motor allein genügend Unterdruck erzeugt, abgestellt werden kann und der Unterdruck kaum gehindert durch die Flatterventile eines solchen Kompressors hindurch geleitet wird. Der Unterdruck wird dann in der Venturidüse erzeugt und über den abgeschalteten Kompressor bis in die Regeneratorkammer geleitet. In einer Axialkolbenpumpe nimmt der Gasstrom Ölreste auf, die wieder von ihm getrennt werden müssen. Dazu ist ein Zyklon geeignet, in dem die Gase so kreisförmig verwirbelt werden, dass sich die Ölanteile an den Wanden des Zyklons niederschlagen und abtropfen. Aus dem Zyklon können diese Ölreste dann in den Kompressor zurückfließen. Der Antrieb des Kompressors erfolgt günstigerweise vom Motor aus über eine Riemenscheibe mit Magnetkupplung, über die die Leistung des Kompressors geregelt werden kann. Die Steuerung der Anlage betätigt die magnetische Kupplung. Dadurch wird die Fördermenge des Kompressors so geregelt, dass abhängig von der Drehzahl, der Lastsituation und der Temperatur des Motors die maximale Menge des Regeneratorgases gewonnen wird. Auch wird im Schubbetrieb der Kompressor abgeschaltet, um ein Auskühlen der Membran zu verhindern. Das gewonnene Gas wird der Ansaugluft des Motors über die Venturi-Düse wieder beigemischt und dann im Motor verbrannt. In dem Regeneratorgas befinden sich Wasseranteile, die zur Bildung von kurzkettigen Kohlenwasserstoffen beitragen. Die Klopffestigkeit des Kraftstoffes wird damit erhöht.In the hitherto known embodiment of Regeneratgasgewinnung via a membrane of a catalyst, the necessary negative pressure is applied by the intake of the engine. During load changes or in overrun mode, when the throttle valve of the engine closes, this negative pressure breaks down. Thus, no regeneration gas is obtained in these operating conditions. It is now proposed to generate the negative pressure by a compressor and to regulate the negative pressure depending on the operating state of the engine. An axial piston pump is particularly suitable for this application since, when the engine alone generates sufficient negative pressure, it can be switched off and the negative pressure is hardly conducted through the flutter valves of such a compressor. The negative pressure is then generated in the Venturi nozzle and passed through the shut-off compressor to the regenerator. In an axial piston pump, the gas stream absorbs oil residues that have to be separated from it again. For this purpose, a cyclone is suitable in which the gases are swirled so circular that the oil components precipitate on the walls of the cyclone and drip off. From the cyclone these oil residues can then flow back into the compressor. The drive of the compressor is conveniently carried out from the engine via a pulley with magnetic coupling, via which the performance of the compressor can be controlled. The control of the system actuates the magnetic coupling. As a result, the flow rate of the compressor is controlled so that the maximum amount of regenerator gas is obtained depending on the speed, the load situation and the temperature of the engine. Also, the compressor is turned off in overrun to prevent the membrane from cooling down. The recovered gas is added to the intake air of the engine via the Venturi nozzle and then burned in the engine. The regenerator gas contains water that contributes to the formation of short-chain hydrocarbons. The knock resistance of the fuel is thus increased.
Auf diese Weise wird der Kraftstoff für den Motor optimal ausgenutzt und der Kraftstoffverbrauch des Motors entscheidend gesenkt. Ein Eingriff in das Motormanagement ist dafür nicht erforderlich. Bei einem Defekt der Membran könnten Abgase in das Kreislaufsystem dringen. Um dies zu verhindern, ist ein Sicherheitsventil vorgesehen, dass den Abzug von Abgasen aus dem Katalysator verhindert. Wenn dieses Sicherheitsventil schließt, läuft der Motor normal weiter, allerdings ohne Ausnutzung des Regeneratorgases.In this way, the fuel for the engine is optimally utilized and the fuel consumption of the engine significantly reduced. An intervention in the engine management is not required. If the membrane breaks down, exhaust gases could enter the circulation system. To prevent this, a safety valve is provided which prevents the withdrawal of exhaust gases from the catalyst. When this safety valve closes, the engine continues to run normally, but without using the regenerator gas.
Das gewonnene Regeneratorgas ist sehr kühl. Während im betriebswarmen Katalysator Temperaturen von ca. 900°C vorhanden sind, besitzen die Regeneratorgase, die aus einer Kammer hinter der Membran aus dem Katalysator abgezogen werden, eine Temperatur von etwa –10° bis 0°C. Die Kälte des Gases wird vorteilhafterweise für Kühlzwecke genutzt. So wird in einer Ausführungsform das gewonnene Regeneratorgas in den Verdampfer eines Klimagerätes geleitet. Auf diese Weise kann ein Klimagerät vollständig ohne eigenes Kältemittel, wie etwa umweltschädliches Frigen, betrieben werden. Als Kältemittel dient das Regeneratorgas, das wieder im Motor verbrannt wird. Somit ist das Klimagerät mit in den Kreislauf des Regeneratorgases einbezogen. Ein Kondensator für das Kältemittel entfällt ebenso. Die Kälteleistung des Verdampfers kann von der Steuerung oder von einem Klimaregelgerät aus erfolgen.The recovered regenerator gas is very cool. While in the warm catalyst temperatures of about 900 ° C are present, the regenerator gases, which are withdrawn from a chamber behind the membrane from the catalyst, a temperature of about -10 ° to 0 ° C. The cold of the gas is advantageously used for cooling purposes. Thus, in one embodiment, the recovered regenerator gas is passed into the evaporator of an air conditioner. In this way, an air conditioner can be completely operated without its own refrigerant, such as polluting Frigen. The refrigerant used is the regenerator gas, which is burned again in the engine. Thus, the air conditioner is included in the cycle of regenerator gas. A condenser for the refrigerant is eliminated as well. The cooling capacity of the evaporator can be done by the controller or by a climate control device.
Ein anderer Anwendungsfall für die anfallende Kälte ist die Ladeluftkühlung von Turboladern.Another application for the resulting cold is the intercooler of turbochargers.
Eine Ausführungsform der Erfindung ist in den Figuren beispielhaft beschrieben.An embodiment of the invention is described by way of example in the figures.
In
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Ansaugluftintake
- 22
- Abgasexhaust
- 33
- Ansaugrohrintake
- 44
- Drosselklappethrottle
- 55
- Abgasrohrexhaust pipe
- 66
- RegenratgasleitungRegenratgasleitung
- 77
- Druckleitung KompressorPressure line compressor
- 88th
- Venturi-LeitungVenturi conduit
- 99
- Kälteleitungcold line
- 1010
- Ventil KlimagerätValve air conditioner
- 1111
- Magnetkupplungmagnetic coupling
- 1212
- Regenerat-KammerRegenerated chamber
- 1313
- Membranmembrane
- 1414
- Sicherheitsventilsafety valve
- 1515
- Schalldämpfersilencer
- 1616
- Steuerleitungencontrol lines
- 1717
- Druckventilpressure valve
- 1818
- Saugventilsuction
- 1919
- ÖlrückführleitungOil return line
- KATKAT
- Katalysatorcatalyst
- KGKG
- Klimagerätair conditioning
- KOMCOM
- Kompressorcompressor
- MOTMOT
- Motorengine
- STST
- Steuerungcontrol
- VV
- Venturi-DüseVenturi nozzle
- ZZ
- Zykloncyclone
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007037494.3A DE102007037494B4 (en) | 2007-08-08 | 2007-08-08 | Exhaust gas recirculation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007037494.3A DE102007037494B4 (en) | 2007-08-08 | 2007-08-08 | Exhaust gas recirculation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE102007037494A1 DE102007037494A1 (en) | 2009-02-19 |
| DE102007037494B4 true DE102007037494B4 (en) | 2016-09-29 |
Family
ID=40279330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102007037494.3A Expired - Fee Related DE102007037494B4 (en) | 2007-08-08 | 2007-08-08 | Exhaust gas recirculation system |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102007037494B4 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19840554A1 (en) * | 1997-09-08 | 1999-03-11 | Cummins Engine Co Inc | Exhaust gas recirculation system for delivery and control of exhaust gas circulation e.g. for IC engine |
| DE102004002742A1 (en) * | 2004-01-20 | 2005-08-11 | Hartmut Lederer | Regenerator of combustion exhaust gases with catalyst |
-
2007
- 2007-08-08 DE DE102007037494.3A patent/DE102007037494B4/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19840554A1 (en) * | 1997-09-08 | 1999-03-11 | Cummins Engine Co Inc | Exhaust gas recirculation system for delivery and control of exhaust gas circulation e.g. for IC engine |
| DE102004002742A1 (en) * | 2004-01-20 | 2005-08-11 | Hartmut Lederer | Regenerator of combustion exhaust gases with catalyst |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007037494A1 (en) | 2009-02-19 |
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Free format text: PREVIOUS MAIN CLASS: F02M0025070000 Ipc: F02M0026340000 |
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| R082 | Change of representative |
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| R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |