WO1997030345A1 - Messfühler - Google Patents
Messfühler Download PDFInfo
- Publication number
- WO1997030345A1 WO1997030345A1 PCT/DE1996/002041 DE9602041W WO9730345A1 WO 1997030345 A1 WO1997030345 A1 WO 1997030345A1 DE 9602041 W DE9602041 W DE 9602041W WO 9730345 A1 WO9730345 A1 WO 9730345A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor element
- sealing body
- hole
- sensor
- seal
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
-
- 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
- G01N27/4078—Means for sealing the sensor element in a housing
-
- 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
- Y10S277/00—Seal for a joint or juncture
- Y10S277/935—Seal made of a particular material
- Y10S277/943—Ceramic or glass
Definitions
- the invention relates to a sensor, in particular for determining the oxygen content in exhaust gases from
- a sensor in which a planar sensor element is fixed in a longitudinal bore of a housing by means of a seal, the seal being arranged between two ceramic molded parts.
- the ceramic molded parts consist of Al 2 0 3 .
- a pre-sintered steatite molded body is used as the seal, which is deformed when the sensor is mounted by applying pressure to one of the two ceramic molded parts and thereby lies gas-tight on the circumference of the sensor element.
- Elongated holes of the ceramic molded parts and the sealing body cannot be locked and that by mutually rotating the ceramic molded parts or the sealing body to the Ceramic molded parts when pressing the sealing body, the sensor element is damaged or destroyed by the hard edges of the ceramic molded parts.
- the object of the invention is to simplify the assembly of the sensor element when it is inserted into the housing of the sensor and to increase the manufacturing reliability and manufacturing quality.
- the invention according to claim 1 causes the sensor element to be locked in the sealing body, so that the sensor element maintains its axial installation position when inserted into the housing.
- the invention according to claim 5 leads to the fact that the through holes of the ceramic molded parts and of the sealing body, which are designed as elongated holes, inevitably experience a radial alignment during assembly, so that the edges of the ceramic molded parts cannot damage or break the sensor element during pressing. A particularly high level of manufacturing reliability and ease of assembly is present if the inventions of claim 1 and claim 5 are used in combination.
- FIG. 1 shows a part of a measuring gas side of a measuring probe in cross section
- FIG. 2a shows an end view of a shaped ceramic part on the measuring gas side
- FIG. 2b shows a section through the shaped ceramic part according to FIG. 2a along the line II-II
- FIG. 3a shows an end view of a sealing body according to a first embodiment
- FIG 3b shows a sectional view through the sealing body according to FIG. 3a along the line III-III
- FIG. 3c shows an end view of a sealing body according to a second exemplary embodiment
- FIG. 4a shows an end view of a connection side
- Ceramic molded part and Figure 4b is a sectional view through the ceramic molded part according to Figure 4a along the line IV-IV.
- FIG. 1 shows a section of a gas sensor 10 on the measuring gas side, for example an electrochemical oxygen sensor which has a metallic housing 12 which has a thread 13 as a fastening means for installation in a measuring gas tube (not shown).
- the housing 12 has a longitudinal bore 15 with a shoulder-shaped ring surface 16.
- a measuring gas-side ceramic molded part 18, a seal 19 and a connection-side ceramic molded part 20 are arranged in the longitudinal bore 15 .
- the ceramic molded parts 18, 20 and the seal 19 extend a planar sensor element 22 with a section 23 on the measuring gas side and a section 24 on the connection side.
- the ceramic molded parts 18 and 20 consist of an electrically insulating ceramic, for example A1 2 0 3 .
- the seal 19 consists of steatite or boron nitride. Before installation in the longitudinal bore 15 of the housing 12, the seal 19 is given a preform which is produced by pressing steatite powder or boron nitride powder to form a sealing body 19 '(FIGS. 3a, 3b, 3c).
- the ceramic molded parts 18, 20 have a much higher hardness than the sealing body 19 'and are not deformable.
- the measuring gas-side section 23 of the sensor element 22 protrudes from the housing 11 and is surrounded by a protective tube 26 which is fixed to the housing 12.
- the protective tube 26 has inlet and outlet openings 27 for the gas to be measured.
- connection-side section 24 has
- the connection contacts 28 are contacted with a contact plug, not shown, provided with a connecting cable.
- the connection-side section 24 protruding from the housing 12 is surrounded by a metallic sleeve 30 which is welded to the housing 12 in a gas-tight manner.
- the sleeve 30 protects the connection-side section 24 from environmental influences and has an opening, not shown, through which the connecting cables are guided to the outside. The opening is closed in a manner known per se by means of a cable bushing.
- the measuring gas-side ceramic molded part 18 is cylindrical in accordance with FIG. 2a and FIG. 2b and has an axially symmetrical through hole 32 which, for example, has a Rectangular cross section, which is suitable for performing the planar sensor element 22.
- the ceramic molded part 18 is provided on the measuring gas side end face with a bevel 33 and on the opposite end face with a protrusion 34 protruding, for example, from the end face in a trapezoidal shape.
- the projection 34 runs over the entire diameter of the cylindrical ceramic molded part and extends at right angles to the large side length of the rectangular through hole 32.
- the bevel 33 of the ceramic molded part 18 is seated on a metallic sealing ring 36 resting on the annular surface 16 of the housing 12.
- Figures 3a, 3b and 3c show the sealing body 19 'before installation in the longitudinal bore 15 of the housing 12.
- the sealing body 19' also has an axially symmetrical through hole 42 with a rectangular cross section.
- the sealing body 19 ' also has a first indentation 43 on one end face and a second indentation 44 on the other end face
- Deformations 43, 44 each extend over the diameter of the sealing body 19 ′ and likewise run at right angles to the large side length of the rectangular through hole 42.
- Fixing means for the sensor element 22 are formed in the rectangular through-hole 42 of the sealing body 19 'and narrow the cross-section of the through-hole 42 at certain points.
- the fixing means are designed as chamfers 46 formed in the four inner edges of the rectangular through hole 42.
- the dimensions of the rectangular through hole 42 and the chamfers 46 are designed such that the completely sintered planar sensor element 22, which is a hard and brittle ceramic body, has less through the through hole 42 Force can be pressed, the edges of the sensor element 22 deforming or scraping the chamfers 46, so that the sensor element 22 is locked in the through hole 42.
- FIG. 3c A second exemplary embodiment for forming the fixing means is shown in FIG. 3c.
- opposing tooth-shaped projections 48 are formed on the inner surfaces of the through hole 32.
- the tooth-shaped projections 48 are like the chamfers 46 of the first
- Embodiment designed such that the sensor element 22 scrapes or deforms the projections 48 when inserted under slight pressure and is thereby fixed in the through hole 42.
- connection-side ceramic molded part 20 also has an axially symmetrical through hole 52 with a rectangular cross section.
- the ceramic molded part 20 also has, for example, a trapezoidal projection 54 on one end face, which extends over the diameter of the ceramic molded part and extends at right angles to the large side length of the rectangular through hole 52.
- the sealing ring 36 placed on the annular surface 16 of the housing 12. Then the measuring gas-side ceramic molding 18 is placed on the sealing ring 36. The sealing body 19 ′ is placed on the ceramic molded part 18, the protrusion 34 protruding from the end face of the ceramic molded part 18 engaging in an indentation 43. The sensor element 22 is pushed through the through hole 42 with little effort. As already described, the chamfers 46 or tooth-shaped protrusions 48 are deformed and the sensor element 22 in the required installation position locked. The connection-side ceramic molded part 20 is now guided over the connection-side end 24 of the sensor element 22 and placed on the sealing body 19. The projection 54 formed on the ceramic molded part 20 engages in the indentation 44 of the sealing body 19 '.
- a pressure sleeve 60 with, for example, several, evenly distributed and inward-pointing claws 61, which engage in notches 62 formed on the housing, is placed on the connection-side ceramic molded part 20 protruding from the housing 12.
- the sealing body 19 ' is located in the longitudinal bore 15 of the housing 12 between the two ceramic molded parts 18 and 20.
- a compressive force is now applied to the ceramic molded part 20 on the connection side, which is transmitted to the sealing body 19'.
- the compressive force is such that the pressed sealing body 19 'is crushed and the powder constituents are both on the longitudinal bore 15 of the Press on housing 12 as well as on sensor element 22.
- the gas and gas-tight seal 19 thus results in the housing 22 by the deformation of the sealing body 19 '.
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96945534A EP0820587B1 (de) | 1996-02-14 | 1996-10-25 | Dichtungsanordnung in einem Messfühler |
US08/930,622 US5942092A (en) | 1996-02-14 | 1996-10-25 | Sensor |
JP9528868A JPH11504119A (ja) | 1996-02-14 | 1996-10-25 | 測定センサ |
DE59611178T DE59611178D1 (de) | 1996-02-14 | 1996-10-25 | Dichtungsanordnung in einem Messfühler |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19605290A DE19605290C2 (de) | 1996-02-14 | 1996-02-14 | Meßfühler |
DE19605290.4 | 1996-02-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997030345A1 true WO1997030345A1 (de) | 1997-08-21 |
Family
ID=7785285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/002041 WO1997030345A1 (de) | 1996-02-14 | 1996-10-25 | Messfühler |
Country Status (5)
Country | Link |
---|---|
US (1) | US5942092A (de) |
EP (1) | EP0820587B1 (de) |
JP (1) | JPH11504119A (de) |
DE (2) | DE19605290C2 (de) |
WO (1) | WO1997030345A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105424886A (zh) * | 2015-12-09 | 2016-03-23 | 苏州工业园区传世汽车电子有限公司 | 内燃机用氧传感器 |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19707458A1 (de) * | 1997-02-25 | 1998-08-27 | Bosch Gmbh Robert | Meßfühler und Verfahren zu dessen Herstellung |
DE19714203C2 (de) * | 1997-04-07 | 2000-06-29 | Bosch Gmbh Robert | Dichtelement für Sensoren |
JP3691242B2 (ja) * | 1998-02-26 | 2005-09-07 | 日本特殊陶業株式会社 | ガスセンサ |
DE19814503A1 (de) * | 1998-04-01 | 1999-10-07 | Bosch Gmbh Robert | Dichtungsanordnung für ein Sensorelement eines Gas-Sensors |
JP3703627B2 (ja) * | 1998-06-18 | 2005-10-05 | 日本特殊陶業株式会社 | ガスセンサ |
JP3518796B2 (ja) * | 1998-07-07 | 2004-04-12 | 日本特殊陶業株式会社 | ガスセンサ |
US6358383B2 (en) * | 1999-03-25 | 2002-03-19 | Delphi Technologies, Inc. | Exhaust constituent sensor and method of packaging the same |
US6524740B1 (en) | 2000-03-21 | 2003-02-25 | Teledyne Technologies Incorporated | Method and apparatus for improved gas sensor |
US6623612B2 (en) * | 2000-06-30 | 2003-09-23 | Denso Corporation | Sealing structure of gas sensor |
US6682639B2 (en) | 2001-01-26 | 2004-01-27 | Ngk Spark Plug Co., Ltd. | Gas sensor |
DE10132828A1 (de) * | 2001-07-06 | 2003-01-16 | Bosch Gmbh Robert | Gasmessfühler |
US6719950B2 (en) | 2001-11-14 | 2004-04-13 | Robert Bosch Corporation | Miniaturized exhaust gas sensor |
DE10222789B4 (de) * | 2002-05-23 | 2006-12-07 | Robert Bosch Gmbh | Gasmeßfühler |
US6843105B1 (en) * | 2003-06-30 | 2005-01-18 | Robert Bosch Corporation | Contact pin for exhaust gas sensor |
US7404883B2 (en) | 2004-04-12 | 2008-07-29 | Robert Bosch Gmbh | Insulation bushing assembly for an exhaust gas sensor |
DE102004033958A1 (de) * | 2004-07-14 | 2006-02-09 | Robert Bosch Gmbh | Messfühler |
DE102005012449A1 (de) * | 2005-03-18 | 2006-09-21 | Robert Bosch Gmbh | Sensor und Verfahren zu dessen Herstellung |
JP4680662B2 (ja) * | 2005-04-26 | 2011-05-11 | 日本特殊陶業株式会社 | ガスセンサ |
US20080016946A1 (en) * | 2006-07-18 | 2008-01-24 | Honeywell International Inc. | Gas sensor packaging for elevated temperature and harsh environment and related methods |
US8252158B2 (en) * | 2006-11-01 | 2012-08-28 | Honeywell International Inc. | Oxygen sensors |
JP4826458B2 (ja) * | 2006-12-11 | 2011-11-30 | 株式会社デンソー | ガスセンサ取付構造 |
US8147667B2 (en) * | 2006-12-20 | 2012-04-03 | Robert Bosch Gmbh | Exhaust gas sensor and method of manufacture |
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 |
US7656236B2 (en) | 2007-05-15 | 2010-02-02 | Teledyne Wireless, Llc | Noise canceling technique for frequency synthesizer |
US8179045B2 (en) | 2008-04-22 | 2012-05-15 | Teledyne Wireless, Llc | Slow wave structure having offset projections comprised of a metal-dielectric composite stack |
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 |
US9435669B2 (en) * | 2012-12-20 | 2016-09-06 | Robert Bosch Gmbh | Intake gas sensor with vortex for internal combustion engine |
US9202660B2 (en) | 2013-03-13 | 2015-12-01 | Teledyne Wireless, Llc | Asymmetrical slow wave structures to eliminate backward wave oscillations in wideband traveling wave tubes |
CN105445352A (zh) * | 2015-10-21 | 2016-03-30 | 厦门宏发电力电器有限公司 | 一种片式氧传感器结构及制造方法 |
US11002700B2 (en) | 2017-11-21 | 2021-05-11 | Honeywell International Inc. | High temperature gas sensor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0087626A2 (de) * | 1982-02-26 | 1983-09-07 | Robert Bosch Gmbh | Gassensor, insbesondere für Abgase von Brennkraftmaschinen |
EP0398579A2 (de) * | 1989-05-15 | 1990-11-22 | Ngk Insulators, Ltd. | Gasfühler |
WO1992008127A1 (de) * | 1990-10-26 | 1992-05-14 | Robert Bosch Gmbh | Gasmessfühler, insbesondere zur bestimmung des sauerstoffgehaltes in abgasen von brennkraftmaschinen |
DE4318789A1 (de) * | 1993-06-05 | 1994-12-08 | Bosch Gmbh Robert | Dichtung für ein Sensorelement eines Gassensors |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2271936A (en) * | 1940-12-09 | 1942-02-03 | Harry Y Carson | Pipe joint |
US2985291A (en) * | 1958-04-28 | 1961-05-23 | Schoepe Adolf | Composite seal construction |
US3095619A (en) * | 1958-12-16 | 1963-07-02 | Edwin F Peterson | Method and means for sealing adjacent coacting closure surfaces of cavity contouringstructures |
US3767215A (en) * | 1972-09-01 | 1973-10-23 | Us Navy | Multi-ring hydraulic seal for irregular bore surfaces |
JPH063429B2 (ja) * | 1984-10-18 | 1994-01-12 | 日本碍子株式会社 | 酸素センサ |
JPH0821788B2 (ja) * | 1989-09-18 | 1996-03-04 | 北川工業株式会社 | シール・シールド構造 |
DE4126378A1 (de) * | 1990-10-26 | 1992-04-30 | Bosch Gmbh Robert | Gasmessfuehler, insbesondere zur bestimmung des sauerstoffgehaltes in abgasen von brennkraftmaschinen |
DE4318107A1 (de) * | 1993-06-01 | 1994-12-08 | Bosch Gmbh Robert | Meßfühleranordnung in einer Gasleitung |
-
1996
- 1996-02-14 DE DE19605290A patent/DE19605290C2/de not_active Expired - Fee Related
- 1996-10-25 WO PCT/DE1996/002041 patent/WO1997030345A1/de active IP Right Grant
- 1996-10-25 US US08/930,622 patent/US5942092A/en not_active Expired - Fee Related
- 1996-10-25 EP EP96945534A patent/EP0820587B1/de not_active Expired - Lifetime
- 1996-10-25 JP JP9528868A patent/JPH11504119A/ja not_active Ceased
- 1996-10-25 DE DE59611178T patent/DE59611178D1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0087626A2 (de) * | 1982-02-26 | 1983-09-07 | Robert Bosch Gmbh | Gassensor, insbesondere für Abgase von Brennkraftmaschinen |
EP0398579A2 (de) * | 1989-05-15 | 1990-11-22 | Ngk Insulators, Ltd. | Gasfühler |
WO1992008127A1 (de) * | 1990-10-26 | 1992-05-14 | Robert Bosch Gmbh | Gasmessfühler, insbesondere zur bestimmung des sauerstoffgehaltes in abgasen von brennkraftmaschinen |
DE4318789A1 (de) * | 1993-06-05 | 1994-12-08 | Bosch Gmbh Robert | Dichtung für ein Sensorelement eines Gassensors |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105424886A (zh) * | 2015-12-09 | 2016-03-23 | 苏州工业园区传世汽车电子有限公司 | 内燃机用氧传感器 |
Also Published As
Publication number | Publication date |
---|---|
DE19605290C2 (de) | 1998-02-26 |
DE19605290A1 (de) | 1997-08-21 |
EP0820587A1 (de) | 1998-01-28 |
DE59611178D1 (de) | 2005-02-03 |
JPH11504119A (ja) | 1999-04-06 |
US5942092A (en) | 1999-08-24 |
EP0820587B1 (de) | 2004-12-29 |
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