DE102005049309A1 - Device for returning and cooling exhaust gas of an internal combustion engine - Google Patents
Device for returning and cooling exhaust gas of an internal combustion engine Download PDFInfo
- Publication number
- DE102005049309A1 DE102005049309A1 DE102005049309A DE102005049309A DE102005049309A1 DE 102005049309 A1 DE102005049309 A1 DE 102005049309A1 DE 102005049309 A DE102005049309 A DE 102005049309A DE 102005049309 A DE102005049309 A DE 102005049309A DE 102005049309 A1 DE102005049309 A1 DE 102005049309A1
- Authority
- DE
- Germany
- Prior art keywords
- exhaust gas
- valve
- egr
- egr valve
- oxidation catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
-
- 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
- F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
-
- 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
- F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
-
- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
-
- 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
- F02M26/25—Layout, e.g. schematics with coolers having bypasses
-
- 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
- F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Die Erfindung betrifft eine Vorrichtung zur Rückführung und Kühlung von Abgas einer Brennkraftmaschine, insbesondere eines Dieselmotors (2) eines Kraftfahrzeuges, wobei die Brennkraftmaschine (2) eine Ansaugleitung (6) und eine Abgasleitung (3) sowie eine Abgasrückführleitung (AGR-Leitung) (8) aufweist und in der Abgas- bzw. AGR-Leitung (3, 8) mindestens ein Abgaswärmeübertrager (13), ein AGR-Ventil (12) sowie ein eine oxidationskatalytische Beschichtung aufweisender Oxidationskatalysator (11) angeordnet sind. DOLLAR A Es wird vorgeschlagen, dass der Oxidationskatalysator (11) in Strömungsrichtung des Abgases vor dem AGR-Ventil (12) angeordnet ist.The invention relates to a device for returning and cooling exhaust gas of an internal combustion engine, in particular a diesel engine (2) of a motor vehicle, wherein the internal combustion engine (2) an intake pipe (6) and an exhaust pipe (3) and an exhaust gas recirculation line (EGR line) (8 ) and in the exhaust gas or EGR line (3, 8) at least one exhaust gas heat exchanger (13), an EGR valve (12) and an oxidation catalytic coating exhibiting oxidation catalyst (11) are arranged. DOLLAR A It is proposed that the oxidation catalyst (11) in the flow direction of the exhaust gas in front of the EGR valve (12) is arranged.
Description
Die
Erfindung betrifft eine Vorrichtung zur Rückführung und Kühlung von Abgas einer Brennkraftmaschine,
insbesondere eines Dieselmotors eines Kraftfahrzeuges nach dem Oberbegriff
des Patentanspruches 1 – bekannt
durch die
Eine
Vorrichtung zur Rückführung und
Kühlung
von Abgas, ein so genanntes Abgasrückführsystem (AGR-System) wurde
durch die
Ein ähnliches
Abgasrückführungssystem
für einen
Dieselmotor wurde durch die
Durch
die
Nachteilig bei den bekannten AGR-Systemen ist, dass das AGR-Ventil selbst nicht optimal gegen Verschmutzung, insbesondere Rußablagerung geschützt ist.adversely in the known EGR systems, the EGR valve itself is not is optimally protected against contamination, in particular soot deposition.
Es ist Aufgabe der vorliegenden Erfindung, bei einer Vorrichtung zur Abgasrückführung der eingangs genannten Art eine Verschmutzung des AGR-Ventils zu vermeiden bzw. zu verringern.It is the object of the present invention, in a device for Exhaust gas recirculation of initially mentioned type to avoid contamination of the EGR valve or reduce.
Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.These The object is solved by the features of claim 1. advantageous Embodiments of the invention will become apparent from the dependent claims.
Erfindungsgemäß ist vorgesehen, dass der Oxidationskatalysator in Strömungsrichtung des Abgases vor dem AGR-Ventil, insbesondere unmittelbar vor dem AGR-Ventil angeordnet ist. Damit wird der Vorteil erreicht, dass auch das AGR-Ventil infolge Oxidation der Kohlenwasserstoffe vor Ver schmutzung, insbesondere Rußablagerung geschützt ist. Der Oxidationskatalysator kann sich dabei entweder in der Abgasleitung vor oder hinter einer Abgasturbine befinden oder in der AGR-Leitung angeordnet sein. Vorteilhafterweise befindet sich das AGR-Ventil in Strömungsrichtung vor dem Abgaskühler, d. h. auf dessen „heißer" Seite. Insbesondere ist das AGR-Ventil unmittelbar vor dem Abgaswärmeübertrager angeordnet. Durch diese Anordnung wird sowohl das AGR-Ventil als auch der Abgaskühler vor einer Rußablagerung geschützt.According to the invention, it is provided that the oxidation catalyst in the flow direction of the exhaust gas before the EGR valve, in particular arranged directly in front of the EGR valve is. Thus, the advantage is achieved that the EGR valve due to oxidation the hydrocarbons from pollution, especially soot deposition protected is. The oxidation catalyst can either be in the exhaust pipe in front of or behind an exhaust gas turbine or in the EGR line be arranged. Advantageously, the EGR valve is in flow direction in front of the exhaust gas cooler, d. H. on its "hotter" side the EGR valve is located immediately in front of the exhaust gas heat exchanger. By this arrangement will present both the EGR valve and the exhaust gas cooler a soot deposit protected.
Nach einer vorteilhaften Ausgestaltung der Erfindung ist der Oxidationskatalysator in das AGR-Ventil integriert. Der Dieseloxidationskatalysator (DOC) besteht vorzugsweise aus einer Edelmetall-Beschichtung, welche auf einen Träger aufgebracht ist. Das Edelmetall ist vorzugsweise Platin.To An advantageous embodiment of the invention is the oxidation catalyst integrated into the EGR valve. The Diesel Oxidation Catalyst (DOC) preferably consists of a precious metal coating, which on a carrier is applied. The noble metal is preferably platinum.
In einer weiteren vorteilhaften Ausgestaltung der Erfindung ist der Trägerkörper des Oxidationskatalysators zusammen mit dem Oxidationskatalysator, insbesondere im Einlass des AGR-Ventils integriert. Der Trägerkörper ist dabei insbesondere derart ausgebildet, dass er den gesamten Querschnitt des Einlasses ausfüllt. Der Trägerkörper ist insbesondere zylindrisch, konisch usw. ausgebildet. In vorteilhafter Weise wird der Bauraum optimal ausgenutzt und die Oberfläche des Oxidationskatalysators in vorteilhafter Weise vergrößert.In a further advantageous embodiment of the invention is the Carrier body of Oxidation catalyst together with the oxidation catalyst, in particular integrated in the inlet of the EGR valve. The carrier body is in particular designed so that it covers the entire cross-section of the inlet fills. The carrier body is in particular cylindrical, conical, etc. formed. In an advantageous way the space is optimally utilized and the surface of the Oxidized catalyst advantageously increased.
In einer Weiterbildung der Erfindung ist der Oxidationskatalysator insbesondere als Beschichtung direkt im Einlass des AGR-Ventils integriert. In vorteilhafter Weise wird dadurch insbesondere das Trägermaterial eingespart.In a development of the invention is the oxidation catalyst especially as a coating directly in the inlet of the EGR valve integrated. In an advantageous manner, in particular the carrier material saved.
Bei einer Integration in das AGR-Ventil dient die Innenwandung des AGR-Ventils, welche vom Abgas beaufschlagt wird, als Träger für die oxidationskatalytische Beschichtung. Ein AGR-Ventil besteht u. a. aus einem Diffusor, d. h. einem Einlassstutzen, einem Ventilgehäuse und einem Ventilschließglied, z. B. einem Ventilteller – diese Teile werden vom Abgas überströmt und können daher oxidationskatalytisch beschichtet werden, wodurch ein Auskondensieren von im Abgas enthaltenen Kohlenwasserstoffen verhindert und somit ein Festkleben von Rußpartikeln an den Wandungen des AGR- Ventils unterbunden wird. In diesem Falle könnte ein zusätzlicher Oxidationskatalysator in der AGR-Leitung entfallen bzw. entsprechend kleiner dimensioniert werden.at an integration into the EGR valve is the inner wall of the EGR valve, which from Exhaust gas is applied, as a carrier for the oxidation catalytic coating. An EGR valve is u. a. from a diffuser, d. H. an inlet nozzle, a valve housing and a valve closure member, z. B. a valve plate - this Parts are overflowed by the exhaust gas and therefore can oxidation-catalytically coated, whereby a condensation of prevents hydrocarbons contained in the exhaust gas and thus a Sticking soot particles on the walls of the EGR valve is prevented. In this case could be an additional Oxidation catalyst omitted in the EGR line or accordingly be sized smaller.
Nach
einer weiteren vorteilhaften Ausgestaltung der Erfindung kann das
AGR-Ventil mit oxidationskatalytischer Beschichtung mit dem Abgaskühler zu
einer Baueinheit integriert werden, wie dies an sich bereits aus
der
Der
Abgaskühler
kann zusätzlich
einen Bypass für
das Abgas aufweisen, welcher durch ein Bypassventil gesteuert wird – ein derartiger
Abgaswärmeübertrager
mit internem Bypass ist beispielsweise aus der
In einer Weiterbildung der Erfindung sind das AGR-Ventil, das Bypassventil, der Oxidationskatalysator und der Abgaswärmeübertrager einteilig ausgebildet. In vorteilhafter Weise wird dadurch insbesondere der Bauraum reduziert.In In a further development of the invention, the EGR valve, the bypass valve, the oxidation catalyst and the exhaust gas heat exchanger formed integrally. In an advantageous manner, in particular the installation space is thereby reduced.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im Folgenden näher beschrieben.One embodiment The invention is illustrated in the drawing and will be described below described in more detail.
Die
einzige Figur zeigt in schematischer Darstellung ein Abgasrückführsystem
(AGR-System)
Der
Oxidationskatalysator
Nach
einer bevorzugten Ausführungsform der
Erfindung, welche nicht in der Zeichnung dargestellt ist, kann der
Oxidationskatalysator
Claims (11)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005049309A DE102005049309A1 (en) | 2005-10-12 | 2005-10-12 | Device for returning and cooling exhaust gas of an internal combustion engine |
PCT/EP2006/009581 WO2007042181A1 (en) | 2005-10-12 | 2006-10-04 | Device for recirculating and cooling exhaust gas of an internal combustion engine |
EP06806021A EP1937956A1 (en) | 2005-10-12 | 2006-10-14 | Device for recirculating and cooling exhaust gas of an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005049309A DE102005049309A1 (en) | 2005-10-12 | 2005-10-12 | Device for returning and cooling exhaust gas of an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102005049309A1 true DE102005049309A1 (en) | 2007-04-19 |
Family
ID=37452927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102005049309A Withdrawn DE102005049309A1 (en) | 2005-10-12 | 2005-10-12 | Device for returning and cooling exhaust gas of an internal combustion engine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1937956A1 (en) |
DE (1) | DE102005049309A1 (en) |
WO (1) | WO2007042181A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009053362A1 (en) * | 2007-10-24 | 2009-04-30 | Continental Automotive Gmbh | Valve for controlling the exhaust gas backflow |
FR2935024A1 (en) * | 2008-08-13 | 2010-02-19 | Renault Sas | Deposit removing method for thermal exchanger walls of intercooler of exhaust gas recirculation circuit of turbocharger of e.g. diesel engine, of vehicle, involves adjusting temperature of coolant, and circulating coolant during time period |
WO2010121867A1 (en) | 2009-04-24 | 2010-10-28 | Pierburg Gmbh | Exhaust gas recirculation system for a combustion engine |
EP2295772A3 (en) * | 2009-08-19 | 2014-08-20 | Behr America, Inc | Assembly for reclaiming and cooling waste gas from a combustion engine |
DE102007055422B4 (en) * | 2007-11-20 | 2015-04-02 | BorgWarner Esslingen GmbH | Valve for controlling the flow of a gaseous or liquid medium |
WO2015128662A1 (en) * | 2014-02-27 | 2015-09-03 | Johnson Matthey Public Limited Company | Exhaust system having n2o catalyst in egr circuit |
WO2021262418A1 (en) * | 2020-06-26 | 2021-12-30 | Cummins Inc. | Engine system components including catalytic coatings and related apparatuses, methods, systems, and techniques |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3719077A1 (en) * | 1987-06-06 | 1988-12-22 | Daimler Benz Ag | COATED VALVE FOR COMBUSTION ENGINES |
DE19853119C2 (en) * | 1997-11-20 | 2000-11-16 | Avl List Gmbh | Internal combustion engine with an intake system and an exhaust system |
WO2002023033A1 (en) * | 2000-09-12 | 2002-03-21 | Nanogate Technologies Gmbh | Exhaust recycling system with improved performance |
DE10322535A1 (en) * | 2002-05-20 | 2004-02-12 | Denso Corp., Kariya | Exhaust gas recirculation system with a cooler |
DE10321637A1 (en) * | 2002-05-15 | 2004-03-11 | Behr Gmbh & Co. Kg | Heat exchanger |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0666208A (en) * | 1991-09-10 | 1994-03-08 | Yanmar Diesel Engine Co Ltd | Exhaust gas reflux device of diesel engine |
DE9421145U1 (en) | 1994-04-28 | 1995-05-04 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 88045 Friedrichshafen | Diesel internal combustion engine with a heat exchanger for exhaust gas cooling arranged in an exhaust gas recirculation line |
JPH094522A (en) * | 1995-06-21 | 1997-01-07 | Hitachi Ltd | Exhaust gas recirculation control device |
DE19750588B4 (en) | 1997-11-17 | 2016-10-13 | MAHLE Behr GmbH & Co. KG | Device for exhaust gas recirculation for an internal combustion engine |
JP3577956B2 (en) * | 1998-07-23 | 2004-10-20 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
JP3937635B2 (en) * | 1999-03-01 | 2007-06-27 | いすゞ自動車株式会社 | EGR cooler with exhaust gas purification function |
GB9913732D0 (en) | 1999-06-15 | 1999-08-11 | Johnson Matthey Plc | Improvements in emissions control |
JP3552645B2 (en) * | 2000-05-17 | 2004-08-11 | トヨタ自動車株式会社 | Internal combustion engine |
DE10203003B4 (en) | 2002-01-26 | 2007-03-15 | Behr Gmbh & Co. Kg | Exhaust gas heat exchanger |
EP1509692B1 (en) * | 2002-05-15 | 2009-05-13 | Behr GmbH & Co. KG | Switchable waste gas exchanger |
US7481040B2 (en) | 2003-09-18 | 2009-01-27 | Behr Gmbh & Co. Kg | Exhaust-gas heat exchanger, in particular exhaust-gas cooler for exhaust gas recirculation in motor vehicles |
-
2005
- 2005-10-12 DE DE102005049309A patent/DE102005049309A1/en not_active Withdrawn
-
2006
- 2006-10-04 WO PCT/EP2006/009581 patent/WO2007042181A1/en active Application Filing
- 2006-10-14 EP EP06806021A patent/EP1937956A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3719077A1 (en) * | 1987-06-06 | 1988-12-22 | Daimler Benz Ag | COATED VALVE FOR COMBUSTION ENGINES |
DE19853119C2 (en) * | 1997-11-20 | 2000-11-16 | Avl List Gmbh | Internal combustion engine with an intake system and an exhaust system |
WO2002023033A1 (en) * | 2000-09-12 | 2002-03-21 | Nanogate Technologies Gmbh | Exhaust recycling system with improved performance |
DE10321637A1 (en) * | 2002-05-15 | 2004-03-11 | Behr Gmbh & Co. Kg | Heat exchanger |
DE10322535A1 (en) * | 2002-05-20 | 2004-02-12 | Denso Corp., Kariya | Exhaust gas recirculation system with a cooler |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009053362A1 (en) * | 2007-10-24 | 2009-04-30 | Continental Automotive Gmbh | Valve for controlling the exhaust gas backflow |
DE102007055422B4 (en) * | 2007-11-20 | 2015-04-02 | BorgWarner Esslingen GmbH | Valve for controlling the flow of a gaseous or liquid medium |
FR2935024A1 (en) * | 2008-08-13 | 2010-02-19 | Renault Sas | Deposit removing method for thermal exchanger walls of intercooler of exhaust gas recirculation circuit of turbocharger of e.g. diesel engine, of vehicle, involves adjusting temperature of coolant, and circulating coolant during time period |
WO2010121867A1 (en) | 2009-04-24 | 2010-10-28 | Pierburg Gmbh | Exhaust gas recirculation system for a combustion engine |
DE102009018525A1 (en) | 2009-04-24 | 2010-11-11 | Pierburg Gmbh | Exhaust gas recirculation system for an internal combustion engine |
EP2295772A3 (en) * | 2009-08-19 | 2014-08-20 | Behr America, Inc | Assembly for reclaiming and cooling waste gas from a combustion engine |
WO2015128662A1 (en) * | 2014-02-27 | 2015-09-03 | Johnson Matthey Public Limited Company | Exhaust system having n2o catalyst in egr circuit |
US9587591B2 (en) | 2014-02-27 | 2017-03-07 | Johnson Matthey Public Limited Company | Exhaust system having N2O catalyst in EGR circuit |
WO2021262418A1 (en) * | 2020-06-26 | 2021-12-30 | Cummins Inc. | Engine system components including catalytic coatings and related apparatuses, methods, systems, and techniques |
Also Published As
Publication number | Publication date |
---|---|
WO2007042181A1 (en) | 2007-04-19 |
EP1937956A1 (en) | 2008-07-02 |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
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