WO1998038504A1 - Dichtung für ein sensorelement eines messfühlers - Google Patents
Dichtung für ein sensorelement eines messfühlers Download PDFInfo
- Publication number
- WO1998038504A1 WO1998038504A1 PCT/DE1997/003010 DE9703010W WO9838504A1 WO 1998038504 A1 WO1998038504 A1 WO 1998038504A1 DE 9703010 W DE9703010 W DE 9703010W WO 9838504 A1 WO9838504 A1 WO 9838504A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor according
- ceramic
- seal
- glass
- sensor
- Prior art date
Links
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
Definitions
- the invention relates to a sensor according to the preamble of the main claim.
- a sensor is known from US Pat. No. 5,467,636, in which a planar sensor element is fixed in a gas-tight manner in a feedthrough of a molded ceramic part by means of a sealing element.
- the ceramic molded part has a recess on the end face facing away from the exhaust gas, which surrounds the feedthrough and into which a glass melt is introduced.
- the melted glass encloses the sensor element in a gas-tight manner at this point and creates a gas-tight connection to the ceramic molded part.
- the glass melting is the only sealing element that realizes the seal between the sensor element and the molded ceramic part.
- the sensor according to the invention with the characterizing features of the main claim has the advantage that a pre-fixation of the sensor element in the ceramic molded body can be realized when producing the glass melt by means of the press-in additional seal, the pre-fixation being retained even during the joining process with the associated melting of the glass package. Furthermore the pressed-in additional seal relieves the strain on the sensor element / glass melt joint at cooling after the joining process because of the then only radially acting stresses on the glass seal and upon thermal and mechanical stress on the sensor, particularly when the sensor is shaken. In addition, the additional seal during the melting process prevents the flow of glass into the front area of the sensor element, which is thermally highly stressed when the sensor is used.
- a powder pack made of graphite or graphite-containing material as the additional seal, since graphite is not or only partially wetted by molten glass.
- Powder packs made of steatite or similar ceramic materials which are preferably pre-sintered or pressed in such a way that no disruptive reactions between the powder pack and the sealing glass can occur, are inexpensive.
- Another embodiment of the additional seal consists in the use of ceramic foils, for example made of Al2O3 and / or Zr0 2 , which are introduced into the depression of the ceramic molded body and pressed there, so that the sensor element is pre-fixed in the ceramic molded body.
- Li-Al-silicate glass or Li-Ba-Al-silicate glass have proven to be suitable glasses for melting down the glass.
- An electrochemical sensor for determining the oxygen content in exhaust gases from internal combustion engines has a section 10 shown on the measuring gas side and a not shown, well-known connection-side section. Means for electrically contacting the sensor element 26 are accommodated in the connection-side section.
- the measuring sensor has a metallic housing 12 in which a plate-shaped sensor element 26 with an end section 27 on the measuring gas side and an end section 28 on the connection side is arranged.
- the housing 12 is designed with a thread 13 as a fastening means for installation in an exhaust pipe, not shown.
- a longitudinal bore 15 with a shoulder-shaped annular surface 16 is also formed in the housing 12.
- a ceramic molded part 20 is inserted with an end face 21 on the measuring gas side and an end face 22 on the connection side, as well as with an axially extending passage 24.
- the ceramic molded part 20 consists, for example, of Al 2 O 3 and rests on the sealing ring 18 with its end face 21 on the measuring gas side.
- a recess 30 surrounding the leadthrough 24 is introduced into the connection-side end face 22 of the ceramic molded part 20.
- a seal 31 which holds the sensor element 26 gas-tight in the ceramic molded part 20.
- the seal 31 has one powdery sealing pack 32 and a glass melt 33, the glass melt 33 being arranged above the seal pack 32.
- the sealing packing 32 consists, for example, of steatite,
- Graphite, boron nitride or a mixture of these substances for the production of the powdery sealing packing 32, for example, a pre-sintered and / or compressed molded body is produced from the material mentioned, which is inserted into the recess 30.
- the molded body is deformed into its powder components.
- the powder rests on the sensor element 26 and on the wall of the depression 30.
- the sensor element 26 is pre-fixed in the bushing 24 and, at the same time, a first seal is achieved.
- An alternative to the production of the sealing packing 32 is that a ceramic film made of, for example, Al 2 O 3 or ZrO 2 is inserted into the depression 30 in the green state and sintered in at 80 ° C., for example, under the influence of a pressing force.
- the action of the press-in force also produces a powder pack during sintering, so that the ceramic powder contacts the wall of the depression 30 and the sensor element 26.
- the glass melt consists for example of a Li-Al-silicate or a Li-Ba-Al-silicate glass.
- the glass melt is produced in that glass powder or glass grains are introduced into the depression 30 after the powdery sealing pack 32 has been produced. In this state, the sealing arrangement is heated to the melting temperature of the glass used. The glass powder or glass grains fuse and connect to the wall of the depression 30 and the sensor element 26. This makes the gas-tight and gas-tight Seal 31 of the sensor element 26 realized in the ceramic molding.
- a gas-tight and gasoline-tight seal between the ceramic molding 20 and the housing 12 is by means of
- the metal sleeve 40 has, for example, evenly distributed a plurality of claws 37 pointing inwards which engage in notches 38 formed in the housing 12. However, it is also conceivable to weld the metal sleeve 40 to the housing 12.
- the measuring gas-side end section 27 of the sensor element 26 protrudes from the housing 11 and is surrounded by a protective tube 40.
- the protective tube has a plurality of gas inlet and gas outlet openings 41.
- connection contacts 43 are formed on the sensor element 26, the connection contacts 43 are contacted with a connection plug, not shown, and provided with connection cables.
- the connection-side end section 28 protruding from the housing 11 is also surrounded by an encapsulation, not shown, which surrounds the connector plug and protects the end section 28 from environmental influences.
- sealing arrangement according to the invention is not limited to the sealing of solid electrolyte sensor elements. It is also suitable for other temperature-stable and gas-tight seals between ceramic bodies.
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)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019980708479A KR20000064981A (ko) | 1997-02-25 | 1997-12-24 | 측정감지기 |
EP97953669A EP0923723A1 (de) | 1997-02-25 | 1997-12-24 | Dichtung für ein sensorelement eines messfühlers |
US09/171,687 US6223583B1 (en) | 1997-02-25 | 1997-12-24 | Sensor element seal for a detector |
JP10537138A JP2000509823A (ja) | 1997-02-25 | 1997-12-24 | 測定センサのセンサエレメント用のシール装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19707459A DE19707459A1 (de) | 1997-02-25 | 1997-02-25 | Dichtung für ein Sensorelement eines Meßfühlers |
DE19707459.6 | 1997-02-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998038504A1 true WO1998038504A1 (de) | 1998-09-03 |
Family
ID=7821388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1997/003010 WO1998038504A1 (de) | 1997-02-25 | 1997-12-24 | Dichtung für ein sensorelement eines messfühlers |
Country Status (5)
Country | Link |
---|---|
US (1) | US6223583B1 (de) |
EP (1) | EP0923723A1 (de) |
JP (1) | JP2000509823A (de) |
DE (1) | DE19707459A1 (de) |
WO (1) | WO1998038504A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1167961A2 (de) | 2000-06-30 | 2002-01-02 | Denso Corporation | Gassensor und zugehöriges Herstellungsverfahren |
DE102012207751A1 (de) * | 2012-05-09 | 2013-11-14 | Continental Automotive Gmbh | Verfahren zur Herstellung eines Sensors und Sensor |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3691242B2 (ja) * | 1998-02-26 | 2005-09-07 | 日本特殊陶業株式会社 | ガスセンサ |
DE19850959A1 (de) * | 1998-11-05 | 2000-05-11 | Bosch Gmbh Robert | Meßfühler und Verfahren zu seiner Herstellung |
DE10041274C1 (de) * | 2000-08-23 | 2002-01-03 | Daimler Chrysler Ag | Metallgehäuse eines Verbrennungsmotor-Abgassensors mit Schutzohren |
DE10127917C1 (de) * | 2001-06-08 | 2002-12-12 | Bosch Gmbh Robert | Gassensor, insbesondere Lambdasonde |
US20080206107A1 (en) * | 2007-02-23 | 2008-08-28 | Honeywell International Inc. | Gas sensor apparatus for automotive exhaust gas applications |
US7805992B2 (en) * | 2007-03-27 | 2010-10-05 | Honeywell International Inc. | Gas sensor housing for use in high temperature gas environments |
DE102007018001A1 (de) * | 2007-04-17 | 2008-10-23 | Robert Bosch Gmbh | Gassensor zur Bestimmung einer physikalischen Eigenschaft eines Messgases |
CN102346178A (zh) * | 2010-07-26 | 2012-02-08 | 比亚迪股份有限公司 | 一种气体传感器密封件及一种汽车氧传感器 |
USD753801S1 (en) * | 2014-08-11 | 2016-04-12 | Klinger Ltd. | Seal |
JP6414449B2 (ja) | 2014-11-20 | 2018-10-31 | 株式会社デンソー | ガスセンサ |
JP6610228B2 (ja) * | 2015-12-10 | 2019-11-27 | 日本電気硝子株式会社 | ガラス管成形用スリーブ |
EP3361244B1 (de) * | 2017-02-13 | 2022-09-14 | Heraeus Nexensos GmbH | Sensor zur analyse von gasen und verfahren zum herstellen des sensors |
US11002700B2 (en) | 2017-11-21 | 2021-05-11 | Honeywell International Inc. | High temperature gas sensor |
JP7396917B2 (ja) * | 2020-02-12 | 2023-12-12 | 日本碍子株式会社 | ガスセンサ |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5879148A (ja) * | 1981-11-05 | 1983-05-12 | Ngk Spark Plug Co Ltd | 排ガスセンサ |
US5467636A (en) * | 1994-09-27 | 1995-11-21 | General Motors Corporation | Flat plate sensor with a robust package design |
DE4436580A1 (de) * | 1994-10-13 | 1996-04-18 | Bosch Gmbh Robert | Gassensor, insbesondere für Abgase von Brennkraftmaschinen |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4130797A (en) * | 1976-11-25 | 1978-12-19 | Nippon Soken, Inc. | Gas component sensing apparatus |
JPS54137394U (de) * | 1978-03-17 | 1979-09-22 | ||
JPS5613745U (de) * | 1979-07-12 | 1981-02-05 | ||
US4403207A (en) * | 1981-10-26 | 1983-09-06 | General Motors Corporation | Durable titania exhaust gas sensor |
US4414531A (en) * | 1982-09-30 | 1983-11-08 | Ford Motor Company | Partial pressure of oxygen sensor-I |
US4665740A (en) * | 1984-08-22 | 1987-05-19 | Nippondenso Co., Ltd. | Combustion process sensor |
JPS6193944A (ja) * | 1984-10-13 | 1986-05-12 | Ngk Spark Plug Co Ltd | ガス検出素子 |
US4883643A (en) * | 1985-06-20 | 1989-11-28 | Ngk Spark Plug Co., Ltd. | Oxygen sensor protected against contaminants |
JP2659791B2 (ja) * | 1989-03-13 | 1997-09-30 | 日本碍子株式会社 | 防水型酸素センサ |
JPH0637325Y2 (ja) * | 1989-05-15 | 1994-09-28 | 日本碍子株式会社 | 酸素センサ |
JP3000595B2 (ja) * | 1989-09-12 | 2000-01-17 | 株式会社デンソー | ガス成分検出素子の製造方法 |
US5490412A (en) * | 1993-05-11 | 1996-02-13 | General Motors Corporation | Exhaust sensor with removable electrical connector |
US5329806A (en) * | 1993-05-11 | 1994-07-19 | General Motors Corporation | Exhaust sensor with tubular shell |
-
1997
- 1997-02-25 DE DE19707459A patent/DE19707459A1/de not_active Withdrawn
- 1997-12-24 WO PCT/DE1997/003010 patent/WO1998038504A1/de not_active Application Discontinuation
- 1997-12-24 JP JP10537138A patent/JP2000509823A/ja not_active Withdrawn
- 1997-12-24 US US09/171,687 patent/US6223583B1/en not_active Expired - Fee Related
- 1997-12-24 EP EP97953669A patent/EP0923723A1/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5879148A (ja) * | 1981-11-05 | 1983-05-12 | Ngk Spark Plug Co Ltd | 排ガスセンサ |
US5467636A (en) * | 1994-09-27 | 1995-11-21 | General Motors Corporation | Flat plate sensor with a robust package design |
DE4436580A1 (de) * | 1994-10-13 | 1996-04-18 | Bosch Gmbh Robert | Gassensor, insbesondere für Abgase von Brennkraftmaschinen |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 7, no. 176 (P - 214) 4 August 1983 (1983-08-04) * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1167961A2 (de) | 2000-06-30 | 2002-01-02 | Denso Corporation | Gassensor und zugehöriges Herstellungsverfahren |
EP1167961A3 (de) * | 2000-06-30 | 2004-04-21 | Denso Corporation | Gassensor und zugehöriges Herstellungsverfahren |
DE102012207751A1 (de) * | 2012-05-09 | 2013-11-14 | Continental Automotive Gmbh | Verfahren zur Herstellung eines Sensors und Sensor |
DE102012207751B4 (de) * | 2012-05-09 | 2016-09-08 | Continental Automotive Gmbh | Verfahren zur Herstellung eines Sensors und Sensor |
Also Published As
Publication number | Publication date |
---|---|
EP0923723A1 (de) | 1999-06-23 |
JP2000509823A (ja) | 2000-08-02 |
US6223583B1 (en) | 2001-05-01 |
DE19707459A1 (de) | 1998-08-27 |
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