CN1136846A - Electriochemical measuring sensor and process for making it - Google Patents
Electriochemical measuring sensor and process for making it Download PDFInfo
- Publication number
- CN1136846A CN1136846A CN95191010A CN95191010A CN1136846A CN 1136846 A CN1136846 A CN 1136846A CN 95191010 A CN95191010 A CN 95191010A CN 95191010 A CN95191010 A CN 95191010A CN 1136846 A CN1136846 A CN 1136846A
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- Prior art keywords
- sensing element
- housing
- filler
- item
- detector
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- 238000000034 method Methods 0.000 title claims description 26
- 238000007789 sealing Methods 0.000 claims abstract description 53
- 239000007789 gas Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 claims abstract description 3
- 239000000945 filler Substances 0.000 claims description 27
- 238000000576 coating method Methods 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000002912 waste gas Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000007750 plasma spraying Methods 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 238000007761 roller coating Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 229910000990 Ni alloy Inorganic materials 0.000 claims 1
- 238000001125 extrusion Methods 0.000 claims 1
- 238000005245 sintering Methods 0.000 claims 1
- 239000012254 powdered material Substances 0.000 abstract 1
- 239000007784 solid electrolyte Substances 0.000 description 8
- 239000000523 sample Substances 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- G01N27/4078—Means for sealing the sensor element in a housing
-
- 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
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
The invention relates to an electrochemical measuring sensor to determine the oxygen content of gases, and especially that of the exhaust gases of internal combustion engines, with a sensing element sealed into a metal casing, in which there is at least one seal between the sensing element and the casing. The seal (30) consists of a finely ground or powdered material, the volume of which in the uncompressed state is greater than that of a sealing gap (74) between the sensor (22) and the casing (12), whereby the seal is inserted in its large volume between sealing regions of the sensor (22) and the casing (12) and is compacted when the sensor (22) and the casing (12) are assembled together.
Description
The present invention relates to a kind of Electriochemical measuring sensor that is used for oxygen content in the measurement gas, relate in particular to a kind of detector that is used for measuring oxygen content in the engine exhaust gas, this detector is a kind of Electriochemical measuring sensor that is used for oxygen content in the measurement gas, especially a kind of Electriochemical measuring sensor that is used for measuring oxygen content in the waste gas that internal combustion engine produces, described Electriochemical measuring sensor contains a sensing element that is sealed on the metal shell, between described sensing element and described housing, have a seal element at least, and a kind of manufacture method of this detector.
Prior art
The Electriochemical measuring sensor of the type is very familiar for people.For example detector is made dactylitic texture, sensing element is made with solid electrolyte body, solid electrolyte body with sealed tube form sealing and fixing in metal shell.People can distinguish not charged location probe and charged location probe by the finger-like pipe.For charged location probe, the conducting strip of its sensing element outer electrode can form electric connection by the sealing ring and the housing of conduction; For not charged location probe, its electrode directly is connected with a control device, so do not form electric connection between electrode and the housing.Sealing between sensing element and the housing must realize by above two kinds of situations.
A kind of people known at the not charged location probe described in the file DE-OS2504206, used many electrical isolations, the pottery sealing ring, the sealing ring is by aluminium oxide Al
2O
3Content is made greater than 90% alundum.The sealing ring has been realized assembling sealing, electrical isolation between sensing element and the metal shell.This kind seal is wasted textural very much, and owing to adopt the seal that has three sealing rings that be made of many parts, similar, and it is relative adventurous that this structure is also had.
Another people known at file US-PS5, detector described in 228,975 is placed a seal between sensing element and housing, sensing element places in the further sleeve, and the sealing between sensing element and housing realizes by sealing ring and inorganic filler.This further sleeve needs an additional ceramic ring seal and same above-mentioned inorganic filler.This structure because of last generally speaking be very complicated.
Advantage of the present invention
Being characterized as of detector involved in the present invention; seal element by a kind of particulate or or rather dusty material make; the volume of seal element be not subjected under the load condition bigger than the sealing off gap between sensing element and the housing; this detector has following advantage, has promptly realized gasproof and thermotolerance sealing between sensing element and the housing in a simple manner.Seal element is by a kind of granuliform, or or rather by a kind of pulverous material, mainly be that a kind of graphite particulate of filming constitutes, the volume of sealing element is bigger than the slit between sensing element and the housing under no load condition, in simple mode, the sealing element can be placed the appropriate location between sensing element and the housing, only when realizing that filleting engages between housing and the sensing element, just finish the final formation of sealing element.By only working as the filleting joint and finally forming this method of seal element, realized the optimum matching of seal element to the sealing surfaces of housing or sensing element.Therefore can realize the surfaceness of sensing element and/or housing or surface waviness, the out-of-roundness that maybe may occur are compensated.Because the sealing element has been realized sensing element and has been engaged with flat seal filleting between the housing, so can realize reliable air seal or temperature isolation.
In addition, the method that reaches of the present invention has realized the sensing element of detector and the sealing between the housing in a simple manner, and this sealing is finished by rights automatically.Therefore, require the volume of seal element to be greater than volume between the sealing surface of sensing element and housing, the sealing element engages with filleting between the housing by sensing element and has realized sealing.Engaging the method that forms seal element by filleting between housing and the sensing element, is a kind of advantage that has, in any case requisite method.Owing to do not adopt prefabricated and seal element that mechanical property is firm, therefore the tolerance deviation of the seal area of sensing element and/or housing does not require high precision, and existing tolerance deviation can be engaged by filleting and the easy to do compensation of seal element that forms is fallen.
Layout with advantage of the present invention is, seal element as filler will be coated in the sealing range of one of sensing element or housing before filleting engages at least, this can pass through the tool advantage, it is known to be generally people, and fact proved otherwise effective technique such as metal spraying, plasma spraying, roller coating (Aufrollen) or similar method realize.In addition, the sealing ring also can be the sealing ring of a presuppression, like this in the filleting engaging process, but sealing ring easy deformation.Thus, a kind of easy control, reliable encapsulating method have been realized.Its advantage is that especially by this reliable all the time seal between sensing element and housing, the sealing detection of detector becomes and no longer must or significantly reduce greatly.It is also advantageous in that, owing to having adopted the method that only forms seal when filleting engages, just need not at different detectors and and has laid in different seal elements.The related seal element of this invention can be equally applicable to charged location probe or not charged location probe.
The layout of other tool advantage of the present invention is by providing in the characteristic described in the claim of back.
Accompanying drawing
The present invention will be set forth in the embodiment of back in further detail according to accompanying drawing, shown in the figure be:
Fig. 1 is the longitudinal section of this Electriochemical measuring sensor;
Fig. 2 is the enlarged drawing of seal area of the detector of charged position; With
Fig. 3 is the enlarged drawing of seal area of the detector of not charged position.
Embodiment describes
It among Fig. 1 the longitudinal section of this Electriochemical measuring sensor.This detector 10 includes a metal shell 12, in this metal shell outside one hexagon part 14 and screw thread 16 is arranged, and this screw thread is used for detector is fixed on the measurement tracheae that a figure does not draw.Housing 12 is made sleeve-shaped and a through hole 18 is arranged, and through hole 18 is made shoulder hole, and forms a sealing surface 20.Be equipped with a sensing element 22 in the through hole 18 of housing 12, this sensing element 22 includes a bossing 24, and this bossing forms a boss 26.One seal area 28 is arranged between sensing element 22 and housing 12, and an end in sealing district is a sealing surface 20, and the other end is a boss 26.One seal 30 is arranged between sealing surface 20 in seal area 28 and the boss 26.The concrete structure of seal area 28 will be described in Fig. 2 of back and Fig. 3 in further detail.
Next will do to set forth further to the general structure of detector 10 according to Fig. 1.Detector 10 shown in Fig. 1 has one not with the sensing element 22 of position, and this structure is also set up the sensing element 22 of charged position.Difference between not charged position sensing element 22 and the charged position sensing element 22 will be set forth in Fig. 2 and Fig. 3, and this generality structure is applicable to this two kinds of embodiments.
Sensing element 22 can especially can be used for main measurement by the oxygen partial pressure in the waste gas of motor vehicles generation as our known oxygen sensor.Sensing element 22 includes a tube-type solid electrolyte body 32, and the terminal part of the measurement gas face of this solid electrolyte body 32 sealed with ends 34.On the outside surface of the measurement gas of solid electrolyte body 32, be mounted with the potential electrode a sheet of, that gas-permeable is crossed 36.In solid electrolyte body 32 inside is reference gas, for example air.The sheet reference electrode 38 that one permeable gas is arranged on solid electrolyte body 32 inner faces.Potential electrode 36 is connected with the first electrode tie point 42 by a conducting strip 40.One protective sheet 44 is arranged on potential electrode 36 and partially conductive sheet 40.Reference electrode 38 links to each other with the second electrode tie point 48 by second conducting strip 46. Electrode tie point 42 and 48 is positioned on the formed end face 50 in solid electrolyte body 32 open ends.Conducting strip 40 and 46 is made and is integral with sensing element 22 co-sintered by the metallic ceramics sheet.
The measurement gas end of the sensing element that stretches out from the through hole 18 of housing 12 is left certain distance with it protecting tube 52 surrounds the opening 54 that this protecting tube 52 has a measurement gas to come in and go out.Protecting tube 52 is fixed on the end of the measurement gas of housing 12, for example is positioned in the groove 56.The inner chamber 58 of sensing element 22 forms by a bar-shaped heating element 60.This heating element 60 links to each other with an A-power supply also can disconnect by the line that does not illustrate among the figure and interrupts the gas telemeasurement.
One first link 62 is arranged on the first electrode tie point 48, one second link 64 is arranged on the second electrode tie point.Link 64 and 62 is attached on the tubular heating element 60 and links to each other with reference electrode contact 68 with potential electrode contact 66 respectively.Contact 66 links to each other with the stube cable that do not illustrate among the figure with 68, and is connected to the measurement or the control device of outside.
Also have an insulating sheath 70 in the through hole 18 of housing 12 in addition, this insulating sheath 70 is mainly made by stupalith.By the mechanical hook-up that does not illustrate among the figure, this insulating sheath 70 can be pressed on link 62 and 64, therefore can realize link 62 and 64 with electrode tie point 42 and 48 good being electrically connected.
Insulating sheath 70 is loaded along through hole mechanical forces axial, shown in arrow 72 directions by one, the ring platform 26 of sensing element 22 just can be pressed on the sealing surface 20 of housing 12.Seal element 30 between sealing surface 20 and ring platform 26 also is subjected to the loading of same pressure 72, and the mode of having set forth with the front has realized the sealing to gas, water and fuel thus.
Fig. 2 is the synoptic diagram of seal area 28 that has the detector of charged position sensing element 22, and Fig. 3 is the synoptic diagram of seal area 28 that has the detector of not charged position sensing element 22.Although they have different structures, we still describe according to same this same part with reference to shown in the figure 1.
Embodiment shown in Figure 2 is ring platform 26 parts of sensing element 22.One conducting strip 40 is arranged on sensing element 22, and this conducting strip 40 makes potential electrode 36 link to each other with electrode tie point 42.On the inwall of the through hole 18 in housing 12 scopes a conducting strip is arranged, this conducting strip has been realized the electric connection between conducting strip 40 and the housing 12.Sealing surface 20 between housing 12 and sensing element 22 is a sealing off gap 74 with encircling in platform 26 scopes, and stretch along the axial direction of through hole 18 in this slit 74.
At these sealing off gap 74 mid-seal elements 30.This seal element 30 be at working pressure 72 with sensing element 22 with before housing 12 filletings engage, place in the sealing off gap 74.Sealing element 30 is made of a kind of filler 76, and this filler 76 is made up of the black particulate of stone that each all has nickel coating, and this has only illustrated to delineating property in the drawings.Before sensing element 22 inserts through holes 18, can filler 76 be coated in ring platform 26 scopes of sensing element 22 by the known method of people as a kind of such as metal spraying, plasma spraying, roller coating (Aufrollen), brushing (Aufpinseln) or other similar methods.The coating thickness of the filler of being coated 76 is greater than the axial spread length of annulus 74 afterwards.
By loading sensing element 22 is inserted into way in the housing 12, filler 76 is pressed on the sealing surface 20 of housing 12, therefore make filler 76 compression and compactings with pressure 72.By this filler 76 seals, the black particulate 78 of nickel coating stone has produced following synergy, i.e. gasproof, moisture resistance and liquid impermeable and heatproof.This synergy is especially for the high-temperature gas that enters by the perforate on the protecting tube 52 54, and the fuel mixture that is contained in the gas, also has the effect that sees through of preventing.Therefore, that can realize sensing element 22 and waste gas contact jaw and away from the absolute sealing between the waste gas end.
When filler 76 is stressed, sealing surface 20 or ring platform 26, or the surfaceness that exists on the conducting strip 40 just can be compensated, so realized the self-compensation situation of surfaceness or unevenness.The seal element 30 that is formed by the filler 76 that compresses can be engaged on the given profile without a doubt.Seal element 30 smooth, that compress is in filler 76 is squeezed process, and filler 76 is engaged on the surface profile of sealing surface 20 and ring platform 26 and forms.
Another embodiment is that before sensing element 22 inserted, for example when being coated with filler 76 coatings, filler 76 can be realized the adhesive strength of better filler 76 on sensing element 22 like this by precompressed.In addition, can dispose a prior prefabricated sealing ring in filler 76 positions, the sealing ring can produce distortion under the effect of pressure 72.The axial spread length of prefabricated sealing ring is greater than the axial spread length of ring platform 26 afterwards.
Figure 3 shows that the synoptic diagram of the seal area 28 of not charged position sensing element 22, this sectional view is attached to detector shown in Figure 1 10.Just no longer illustrated with part identical among Fig. 2.Be attached on the seal element 30, an insulating coating 80 is arranged between conducting strip 40 and housing 12.This insulating coating 80 has ensured the electrical isolation between conducting strip 40 and sensing element 22 and the housing 12, has realized not charged position thus.As shown in Figure 1, this insulating coating 80 can be applied on whole length of sensing element 22, and then the sensing element 22 that will have this insulating coating 80 is put in the housing 12, and shown in Figure 3 only is the synoptic diagram that this insulating coating stretches at seal area 28.This protective seam 80 for example can be made by the magnesium-spinel or the glaze of plasma spraying, and is sintered to one with sensing element 22.The material of this insulating coating 80 is wanted to be subjected to such an extent that firmly make the pressure 72 of sensing element 22 and housing 12 filletings joint, and can support the above-mentioned already mentioned seal element 30 that forms that compressed by filler 76.
Generally speaking clear, by simply being coated with the way of compacting in advance and/or preburned filler 76, sensing element 22 arbitrarily can be put into the housing 12 of detector charged position or not charged position, realize absolute gasproof, temperature resistant encapsulation between sensing element 22 and the housing 12 thus.Therefore sealing ring that makes in advance and the seal that similarly is suitable for detector 10 ad hoc structures become optional.It is compatible being coated with the method for filler 76 and the method for manufacturing sensing element 22, therefore they can be incorporated in the production procedure.
Claims (14)
1; a kind of Electriochemical measuring sensor that is used for oxygen content in the measurement gas; especially a kind of Electriochemical measuring sensor that is used for measuring oxygen content in the waste gas that internal combustion engine produces; described Electriochemical measuring sensor contains a sensing element that is sealed on the metal shell; between described sensing element and described housing, has a seal element at least; it is characterized in that; described seal element (30) by a kind of particulate or or rather dusty material make, the volume of described seal element (30) be not subjected under the load condition bigger than the sealing off gap (74) between described sensing element (22) and the housing (12).
2, detector as claimed in claim 1 is characterized in that, described seal element (30) is made by the graphite particulate (78) of filming.
As the described detector of one of above-mentioned claim item, it is characterized in that 3, described seal element (30) is a kind of graphite particulate (78) filler (76) of filming.
As the described detector of one of above-mentioned claim item, it is characterized in that 4, described seal element (30) is a kind of filler (76) of compacting in advance.
As the described detector of one of above-mentioned claim item, it is characterized in that 5, described seal element (30) is a kind of preburned filler (76).
As the described detector of one of above-mentioned claim item, it is characterized in that 6, described graphite particulate (78) has formed the coating of a high temperature resistant gas attack.
As the described detector of one of above-mentioned claim item, it is characterized in that 7, described coating is nickel coating or nickel-alloy coating.
8, detector as claimed in claim 1 is characterized in that, described seal element (30) is a kind of deformable extrusion, for example a kind of sealing ring of compacting in advance.
9, a kind ofly contain an Electriochemical measuring sensor manufacture method that is sealed in the sensing element in the described housing especially according to claim 1, it is characterized in that, the seal element of the built-in large volume of sealing range between described sensing element and described housing, the described seal element of tool is compacted when described sensing element engages with described housing filleting.
10, want profit to require 9 described methods as right, it is characterized in that, described seal element as filler will be coated in the sealing range of one of described sensing element or described housing before filleting engages at least.
As the described method of one of above-mentioned claim item, it is characterized in that 11, described filler can be coated with the method compatible with the manufacture method of described sensing element.
As the described method of one of above-mentioned claim item, it is characterized in that 12, described filler can pass through metal spraying, plasma spraying, roller coating is brushed or similar approach is coated with.
As the described method of one of above-mentioned claim item, it is characterized in that 13, described filler was suppressed in advance before described sensing element and described housing filleting joint.
14, as the described method of one of above-mentioned claim item, it is characterized in that, described filler before described sensing element and described housing filleting engage by sintering in advance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4435885.7 | 1994-10-07 | ||
| DE4435885A DE4435885A1 (en) | 1994-10-07 | 1994-10-07 | Electrochemical sensor and process for its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1136846A true CN1136846A (en) | 1996-11-27 |
Family
ID=6530214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95191010A Pending CN1136846A (en) | 1994-10-07 | 1995-09-14 | Electriochemical measuring sensor and process for making it |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0733202A1 (en) |
| JP (1) | JPH09506977A (en) |
| KR (1) | KR960706071A (en) |
| CN (1) | CN1136846A (en) |
| DE (1) | DE4435885A1 (en) |
| WO (1) | WO1996011393A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19624494A1 (en) * | 1996-06-19 | 1998-01-02 | Sick Ag | Extremely rugged inductive or optical sensor unit resisting vibration and shock |
| JPH11153571A (en) * | 1997-11-20 | 1999-06-08 | Denso Corp | Oxygen sensor element |
| JP4592838B2 (en) * | 1998-09-04 | 2010-12-08 | 株式会社デンソー | Oxygen sensor element |
| JP2005326396A (en) * | 2004-04-15 | 2005-11-24 | Denso Corp | Gas sensor |
| CN1301403C (en) * | 2004-08-02 | 2007-02-21 | 天津港保税区鑫利达石油技术发展有限公司 | Probe structure and multipoint gas detector |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2215873A6 (en) * | 1973-01-30 | 1974-08-23 | Bosch Gmbh Robert | |
| DE2504206C3 (en) * | 1975-02-01 | 1981-10-01 | Robert Bosch Gmbh, 7000 Stuttgart | Electrochemical measuring sensor for the determination of the oxygen content in exhaust gases, in particular in exhaust gases from internal combustion engines |
| CA1052863A (en) * | 1975-10-09 | 1979-04-17 | Nissan Motor Co., Ltd. | Oxygen sensor particularly for use in exhaust system for automotive engines |
| DE3206903A1 (en) * | 1982-02-26 | 1983-09-15 | Bosch Gmbh Robert | GAS SENSOR, ESPECIALLY FOR EXHAUST GAS FROM COMBUSTION ENGINES |
| JPS60183857U (en) * | 1984-05-07 | 1985-12-06 | 株式会社デンソー | oxygen concentration detector |
| JPH02146362U (en) * | 1989-05-15 | 1990-12-12 | ||
| JP2708915B2 (en) * | 1989-11-25 | 1998-02-04 | 日本特殊陶業株式会社 | Gas detection sensor |
| DE4318789A1 (en) * | 1993-06-05 | 1994-12-08 | Bosch Gmbh Robert | Seal for a sensor element of a gas sensor |
-
1994
- 1994-10-07 DE DE4435885A patent/DE4435885A1/en not_active Ceased
-
1995
- 1995-09-14 CN CN95191010A patent/CN1136846A/en active Pending
- 1995-09-14 JP JP8512242A patent/JPH09506977A/en active Pending
- 1995-09-14 KR KR1019960702728A patent/KR960706071A/en not_active Application Discontinuation
- 1995-09-14 EP EP95931132A patent/EP0733202A1/en not_active Withdrawn
- 1995-09-14 WO PCT/DE1995/001256 patent/WO1996011393A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| DE4435885A1 (en) | 1996-04-11 |
| WO1996011393A1 (en) | 1996-04-18 |
| KR960706071A (en) | 1996-11-08 |
| JPH09506977A (en) | 1997-07-08 |
| EP0733202A1 (en) | 1996-09-25 |
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