DE102004027633A1 - Sensor for determining the oxygen concentration in the exhaust gas of internal combustion engines - Google Patents
Sensor for determining the oxygen concentration in the exhaust gas of internal combustion engines Download PDFInfo
- Publication number
- DE102004027633A1 DE102004027633A1 DE200410027633 DE102004027633A DE102004027633A1 DE 102004027633 A1 DE102004027633 A1 DE 102004027633A1 DE 200410027633 DE200410027633 DE 200410027633 DE 102004027633 A DE102004027633 A DE 102004027633A DE 102004027633 A1 DE102004027633 A1 DE 102004027633A1
- Authority
- DE
- Germany
- Prior art keywords
- sensor
- gas
- exhaust gas
- sensor element
- sensor according
- 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- Withdrawn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
- 239000007789 gas Substances 0.000 title claims abstract description 46
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 7
- 239000001301 oxygen Substances 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000010521 absorption reaction Methods 0.000 claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims abstract description 16
- 239000000919 ceramic Substances 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- 239000008187 granular material Substances 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 6
- 229910021536 Zeolite Inorganic materials 0.000 claims description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 239000010457 zeolite Substances 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- 235000014653 Carica parviflora Nutrition 0.000 claims description 3
- 241000243321 Cnidaria Species 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 229910001593 boehmite Inorganic materials 0.000 claims description 3
- 150000001639 boron compounds Chemical class 0.000 claims description 3
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910018068 Li 2 O Inorganic materials 0.000 claims description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 2
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 claims description 2
- 229910001947 lithium oxide Inorganic materials 0.000 claims description 2
- YVRGRDDGRSFXCH-UHFFFAOYSA-N magnesium;dioxido(oxo)titanium Chemical compound [Mg+2].[O-][Ti]([O-])=O YVRGRDDGRSFXCH-UHFFFAOYSA-N 0.000 claims description 2
- 231100000572 poisoning Toxicity 0.000 abstract description 5
- 230000000607 poisoning effect Effects 0.000 abstract description 5
- 230000002745 absorbent Effects 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 4
- 230000035939 shock Effects 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 150000003018 phosphorus compounds Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052851 sillimanite Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4077—Means for protecting the electrolyte or the electrodes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
Es wird ein Messfühler zur Bestimmung der Sauerstoffkonzentration im Abgas von Brennkraftmaschinen angegeben, der ein in einem Fühlergehäuse (10) aufgenommenes Sensorelement (12), das mit einem gassensitiven Abschnitt (121) aus dem Fühlergehäuse (10) vorsteht, und ein am Fühlergehäuse (10) festgelegtes, den gassensitiven Abschnitt (121) überdeckendes, haubenartiges Schutzrohr (13) aufweist, das einen über Gasdurchtrittsöffnungen (14) im Schutzrohr (13) mit dem Abgas in Gasaustauschverbindung stehenden Messraum (15) einschließt. Zur Verhinderung einer Vergiftung des Sensorelements (12) in aggressiver thermischer und chemischer Umgebung ist im Messraum (15) ein den gassensitiven Abschnitt (121) des Sensorelements (12) umschließendes, poröses, reaktionsfähiges, keramisches Absorptionsmaterial (16) zum physikalischen und/oder chemischen Binden von im Abgas enthaltenen, für das Sensorelement (12) schädlichen Bestandteilen angeordnet (Fig. 1).A sensor for determining the oxygen concentration in the exhaust gas of internal combustion engines is provided, which has a sensor element (12) received in a sensor housing (10) projecting from the sensor housing (10) with a gas-sensitive section (121) and a sensor housing (10 ), the gas-sensitive portion (121) covering, hood-like protective tube (13) which encloses a via gas passage openings (14) in the protective tube (13) with the exhaust gas in gas exchange connection measuring space (15). In order to prevent poisoning of the sensor element (12) in an aggressive thermal and chemical environment, a porous, reactive, ceramic absorption material (16) enclosing the gas-sensitive section (121) of the sensor element (12) for physical and / or chemical absorption is provided in the measuring chamber (15) Binding contained in the exhaust, for the sensor element (12) harmful components arranged (Fig. 1).
Description
Die Erfindung geht aus von einem Messfühler zur Bestimmung der Sauerstoffkonzentration im Abgas von Brennkraftmaschinen, nach dem Oberbegriff des Anspruchs 1.The The invention is based on a sensor for determining the oxygen concentration in the exhaust gas of internal combustion engines, according to the preamble of the claim 1.
Bei
einem bekannten elektrochemischen Messfühler zur Bestimmung des Sauerstoffgehalts
in Abgasen von Brennkraftmaschinen oder Verbrennungsmotoren (
Vorteile der ErfindungAdvantages of invention
Der erfindungsgemäße Messfühler mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass durch das Einbringen des das Sensorelement vor "Vergiftung" schützenden Absorptionsmaterials in den Messraum das Design des Messfühlers unabgetastet bleibt und der Messfühler lediglich um eine Baukomponente ergänzt wird, was fertigungstechnische Vorteile bietet. Das vorzugsweise aus Metall bestehende Schutzrohr gewährleistet einen zuverlässigen Schutz des Messfühlers gegen mechanische Beschädigungen bei der Montage. Ein Funktionsausfall oder eine schleichende Funktionsdrift über die Einsatzdauer des Messfühlers aufgrund einer Vergiftung der im gassensitiven Vorstehabschnitt des Sensorelements angeordneten Außenelektrode durch im Abgas enthaltene Fremd- oder Schadstoffe, wie Silizium-, Phosphor-, Schwefel- und Bor-Verbindungen, wird verhindert. In gleicher Weise wird ein Thermoschock durch Wasserschlag verhindert, da im Abgas enthaltene Feuchtigkeit vom Absorptionsmaterial zurückgehalten wird und es nicht zur Bildung von Kondenswasser kommt, das dann in Tropfenform auf das heiße Sensorelement auftrifft.Of the inventive sensor with The features of claim 1 has the advantage that by introducing of the sensor element from "poisoning" protective absorbent material in the measuring room the design of the probe remains unscanned and the sensor only a component is added, which is manufacturing technology Offers advantages. The preferably made of metal protective tube guaranteed a reliable one Protection of the sensor against mechanical damage during installation. A functional failure or a creeping drift over the function Operating time of the sensor due to poisoning of the gas-sensitive protruding section of the sensor element arranged outside electrode in the exhaust gas Contaminated or pollutants such as silicon, phosphorus, sulfur and boron compounds, is prevented. In the same way, a Thermal shock prevented by water hammer, as contained in the exhaust gas Moisture is retained by the absorbent material and not The formation of condensation occurs, then in the form of drops the hot Sensor element impinges.
Durch die in den weiteren Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Messfühlers möglich.By in the further claims listed activities are advantageous developments and improvements of the claim 1 specified sensor possible.
Gemäß einer bevorzugten Ausführungsform der Erfindung ist der Messraum vollständig mit dem als Granulat ausgebildeten Absorptionsmaterial ausgefüllt. Dies ist fertigungstechnisch besonders einfach durch Schüttung zu realisieren, wobei der Durchmesser der Gasdurchtrittslöcher im Schutzrohr an die Korngröße des Granulats angepasst wird oder die Gasdurchtrittslöcher mit einem Netz versehen werden, deren Maschenweite kleiner ist als die Korngröße des Granulats.According to one preferred embodiment of Invention, the measuring space is completely formed with the granules Absorptive material filled. This is particularly easy to produce by filling realize, wherein the diameter of the gas passage holes in Protective tube to the grain size of the granules be adapted or the gas passage holes are provided with a network, whose mesh size is smaller than the grain size of the granules.
Gemäß einer vorteilhaften Ausführungsform der Erfindung wird bei einer solchen Granulatfüllung des Messraums als Absorptionsmaterial ein Granulat aus gamma- oder delta-Aluminiumoxid, Zeolith oder Boehemit verwendet.According to one advantageous embodiment of the Invention is in such a granular filling of the measuring space as absorption material granules of gamma or delta alumina, zeolite or boehmite used.
Gemäß einer vorteilhaften Ausführungsform der Erfindung weist das Absorptionsmaterial eine poröse, korallen- oder schwammartige Struktur auf. Dadurch lässt sich eine größere mechanische Stabilität des Messfühlers erreichen.According to one advantageous embodiment of the Invention, the absorbent material has a porous, coral or sponge-like Structure on. By doing so leaves a larger mechanical Stability of the probe to reach.
Gemäß einer vorteilhaften Ausführungsform der Erfindung wird eine solche Struktur durch Einbringen einer Paste aus gamma-Aluminiumoxid (γ-Al2O3) und weiteren Zuschlägen, Porenbildnern und organischen Bindern in den Messraum und anschließendes Einbrennen hergestellt, wobei die Einbrenntemperatur größer 800°C ist.According to an advantageous embodiment of the invention, such a structure is prepared by introducing a paste of gamma-alumina (γ-Al 2 O 3 ) and other additives, pore formers and organic binders in the measuring chamber and subsequent baking, wherein the baking temperature is greater than 800 ° C. ,
Zeichnungdrawing
Die Erfindung ist anhand von in der Zeichnung dargestellten Ausführungsbeispielen in der nachfolgenden Beschreibung näher erläutert. Es zeigen:The The invention is based on embodiments shown in the drawing explained in more detail in the following description. Show it:
Beschreibung der Ausführungsbeispieledescription the embodiments
Der
in
Im
Ausführungsbeispiel
der
Der
in
Das
in
Claims (11)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200410027633 DE102004027633A1 (en) | 2004-06-05 | 2004-06-05 | Sensor for determining the oxygen concentration in the exhaust gas of internal combustion engines |
| PCT/EP2005/051899 WO2005121763A1 (en) | 2004-06-05 | 2005-04-27 | Sensor for determining the oxygen concentration in internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200410027633 DE102004027633A1 (en) | 2004-06-05 | 2004-06-05 | Sensor for determining the oxygen concentration in the exhaust gas of internal combustion engines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102004027633A1 true DE102004027633A1 (en) | 2006-01-05 |
Family
ID=34965186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE200410027633 Withdrawn DE102004027633A1 (en) | 2004-06-05 | 2004-06-05 | Sensor for determining the oxygen concentration in the exhaust gas of internal combustion engines |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102004027633A1 (en) |
| WO (1) | WO2005121763A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009006290A1 (en) * | 2007-06-29 | 2009-01-08 | Robert Bosch Corporation | Contamination-resistant gas sensor element |
| CN101264913B (en) * | 2008-04-03 | 2010-10-06 | 苏州大学 | Rapid Preparation Method of Coral-like Nano α-Al2O3 |
| US8198190B2 (en) | 2007-10-31 | 2012-06-12 | Globalfoundries Inc. | Semiconductor device and method for patterning vertical contacts and metal lines in a common etch process |
| US8906214B2 (en) | 2003-02-10 | 2014-12-09 | Robert Bosch Gmbh | Contamination-resistant gas sensor element |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9297791B2 (en) | 2012-12-20 | 2016-03-29 | Robert Bosch Gmbh | Gas sensor with thermal shock protection |
| JP5997833B2 (en) * | 2013-03-28 | 2016-09-28 | 日本碍子株式会社 | Gas sensor |
| CN103529105B (en) * | 2013-11-06 | 2015-09-02 | 惠州市富济电子材料有限公司 | A kind of tubular oxygen sensor test electrode and protective seam |
| DE102021124442A1 (en) * | 2021-09-21 | 2023-03-23 | Eos Gmbh Electro Optical Systems | Sensor arrangement for an additive manufacturing device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3000993A1 (en) * | 1980-01-12 | 1981-07-23 | Daimler Benz Ag | ELECTROCHEMICAL PROBE WITH PROTECTIVE DEVICE FOR DETERMINING THE OXYGEN CONTENT IN EXHAUST GAS, IN PARTICULAR OF COMBUSTION ENGINES |
| JPS5754856A (en) * | 1980-09-19 | 1982-04-01 | Matsushita Electric Ind Co Ltd | Oxygen concentration detector |
| EP0331513B1 (en) * | 1988-03-03 | 1994-02-02 | Ngk Insulators, Ltd. | Oxygen sensor and method of producing the same |
| JP2748809B2 (en) * | 1992-12-10 | 1998-05-13 | 株式会社デンソー | Gas detector |
| JP3629786B2 (en) * | 1995-01-19 | 2005-03-16 | 株式会社デンソー | Oxygen concentration detector |
| DE20004514U1 (en) * | 2000-03-10 | 2001-07-26 | Robert Bosch Gmbh, 70469 Stuttgart | Electrochemical sensor |
| DE10153735B4 (en) * | 2001-10-31 | 2007-12-13 | Robert Bosch Gmbh | probe |
| JP3969274B2 (en) * | 2001-12-03 | 2007-09-05 | 株式会社デンソー | Gas sensor element and manufacturing method thereof |
-
2004
- 2004-06-05 DE DE200410027633 patent/DE102004027633A1/en not_active Withdrawn
-
2005
- 2005-04-27 WO PCT/EP2005/051899 patent/WO2005121763A1/en not_active Ceased
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8906214B2 (en) | 2003-02-10 | 2014-12-09 | Robert Bosch Gmbh | Contamination-resistant gas sensor element |
| WO2009006290A1 (en) * | 2007-06-29 | 2009-01-08 | Robert Bosch Corporation | Contamination-resistant gas sensor element |
| US8198190B2 (en) | 2007-10-31 | 2012-06-12 | Globalfoundries Inc. | Semiconductor device and method for patterning vertical contacts and metal lines in a common etch process |
| CN101264913B (en) * | 2008-04-03 | 2010-10-06 | 苏州大学 | Rapid Preparation Method of Coral-like Nano α-Al2O3 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005121763A1 (en) | 2005-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE4004172C2 (en) | An oxygen sensor for air-fuel mixture control having a protective layer comprising an oxygen occluding substance, and a method of manufacturing the sensor | |
| DE102009026683B4 (en) | Hydrocarbon capture device with low restriction | |
| AU747495B2 (en) | Storage material for sulfur oxides | |
| DE60014534T2 (en) | Exhaust gas purifying catalyst and process for its production | |
| DE60115363T2 (en) | CATALYST FOR EXHAUST PURIFICATION AND METHOD FOR THE PRODUCTION THEREOF | |
| DE102004027633A1 (en) | Sensor for determining the oxygen concentration in the exhaust gas of internal combustion engines | |
| DE3043997A1 (en) | FLOATING PARTICULATE FILTER FOR DIESEL ENGINE EXHAUST GASES | |
| DE102008000463A1 (en) | exhaust gas sensor | |
| US20060270550A1 (en) | Exhaust gas purifying catalyst | |
| DE102004013853A1 (en) | Sensor for determining a physical property of a sample gas | |
| JP2005283240A (en) | Porous electrode and its manufacturing method | |
| DE2351815B2 (en) | Electrochemical measuring sensor for the determination of the oxygen content in exhaust gases, especially in exhaust gases from internal combustion engines | |
| US8806857B2 (en) | Device and method for removing carbon dioxide from motor vehicle exhaust | |
| DE60219560T2 (en) | CATALYST FOR EXHAUST GAS CLEANING | |
| KR100553117B1 (en) | Denitrification catalyst, manufacturing process and exhaust gas purification method | |
| DE102010033688A1 (en) | Exhaust gas aftertreatment system for internal combustion engine has flow-through monolith with storage capacity designed such that breakthrough signal downstream of flow-through monolith has highest gradient of concentration curve | |
| CH682620A5 (en) | The smoking article. | |
| DE10260849A1 (en) | probe | |
| DE10061287B4 (en) | Exhaust emission control system of an internal combustion engine | |
| DE2134749B2 (en) | burner | |
| DE19949271A1 (en) | Sound absorber for the exhaust gas unit of a motor vehicle driven by an internal combustion engine comprises a component designed as a metallic hollow space structure | |
| DE102008043219A1 (en) | Gas sensor i.e. lambda oxygen sensor, for determining e.g. concentration of oxygen in exhaust gas of internal combustion engine of motor-cycle, has mounting surface directly fixed on metal-sheathed lead in gas-proof manner | |
| DE60123557T2 (en) | CATALYTIC DEVICE FOR EXHAUST GAS CLEANING | |
| EP0957357A1 (en) | Housing for a gassensor with cylindrical, porous protective cap made of sintered powder and having a bore at the front face | |
| DE3507486A1 (en) | CARBON OXIDE BREATHING AIR FILTER |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R012 | Request for examination validly filed |
Effective date: 20110330 |
|
| R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: G01N0027403000 Ipc: G01N0027406000 |
|
| R084 | Declaration of willingness to licence | ||
| R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: G01N0027403000 Ipc: G01N0027406000 Effective date: 20140718 |
|
| R084 | Declaration of willingness to licence |
Effective date: 20140812 |
|
| R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |