JPS6017736Y2 - oxygen concentration detector - Google Patents
oxygen concentration detectorInfo
- Publication number
- JPS6017736Y2 JPS6017736Y2 JP3676579U JP3676579U JPS6017736Y2 JP S6017736 Y2 JPS6017736 Y2 JP S6017736Y2 JP 3676579 U JP3676579 U JP 3676579U JP 3676579 U JP3676579 U JP 3676579U JP S6017736 Y2 JPS6017736 Y2 JP S6017736Y2
- Authority
- JP
- Japan
- Prior art keywords
- oxygen concentration
- tube
- concentration detector
- lead wire
- coil spring
- 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.)
- Expired
Links
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
Description
【考案の詳細な説明】
本考案はルツボ状の内外面に電極を備えた酸素イオン伝
導固体電解質を用いて内燃機関の排ガス中に含まれた酸
素濃度を測定する酸素濃度検出器に係り、この検出器は
それぞれの電極が触れているガスの酸素濃度差によつ電
圧を発生するものであり、内面電極に標準ガスとして空
気を配し、外面電極に触れる自動車の排ガスの酸素濃度
を検出するものである。[Detailed description of the invention] The present invention relates to an oxygen concentration detector that measures the oxygen concentration contained in the exhaust gas of an internal combustion engine using an oxygen ion-conducting solid electrolyte equipped with electrodes on the inner and outer surfaces of a crucible. The detector generates a voltage based on the difference in oxygen concentration between the gases that each electrode is in contact with.Air is placed on the inner electrode as a standard gas, and the outer electrode detects the oxygen concentration in the exhaust gas from a car. It is something.
本考案はこのような検出器における内面電極の外部回路
への導通を取るリード線に関するものである。The present invention relates to a lead wire for connecting an inner surface electrode to an external circuit in such a detector.
従来例を第１図とともに説明する。A conventional example will be explained with reference to FIG.
内面電極３と外面電極２を備えたルツボ状をしている酸
素イオン伝導固体電解質１をハウジング５の段付部に置
き、排気ガスが固体電解質１の内孔に侵入しないように
該固体電解質１の開口段付部にグラファイトシール７を
施こし、このシール７上のハウジング５内に圧縮リング
８、アルミナインシュレータ９、コイルバネ１１、アル
ミナインシュレータ１０を配し、ワッシャー１３の上部
でハウジング５をかしめている。A crucible-shaped oxygen ion conducting solid electrolyte 1 having an inner surface electrode 3 and an outer surface electrode 2 is placed on the stepped part of the housing 5, and the solid electrolyte 1 is placed in a step so that exhaust gas does not enter the inner hole of the solid electrolyte 1. A graphite seal 7 is applied to the stepped opening of the housing 5, and a compression ring 8, an alumina insulator 9, a coil spring 11, and an alumina insulator 10 are placed inside the housing 5 on the seal 7, and the housing 5 is caulked with the upper part of the washer 13. There is.
この時、ワッシャー１３の下部にはバッキング１２を配
して排ガスのハウジング５外への流出を防いでいる。At this time, a backing 12 is disposed below the washer 13 to prevent exhaust gas from flowing out of the housing 5.
そして、上記外面電極２はハウジング５の段付部よりフ
ランジ４を介して自動車本体（図示せず）に導通が取ら
れ、内面電極３は集電端子６より集電管１９、および該
集電管１９の上部において、絶縁外被を有する細い銅線
を束にしたリード線１６をかしめることによって外部に
導通を取っている。The outer electrode 2 is electrically connected to the vehicle body (not shown) from the stepped portion of the housing 5 through the flange 4, and the inner electrode 3 is connected to the current collector tube 19 through the current collector terminal 6 and the current collector. At the upper part of the tube 19, a lead wire 16 made of a bundle of thin copper wires with an insulating jacket is caulked to provide electrical continuity to the outside.
また、防水のためのチューブ１８はゴムバッキング１７
、チューブ保持材１４を介してチューブ圧着部材１５を
かしめることによってハウジング５の上部に固定されて
いる。In addition, the tube 18 for waterproofing has a rubber backing 17.
, is fixed to the upper part of the housing 5 by caulking the tube crimping member 15 via the tube holding member 14.
ここで、グラファイトシール７はコイルバネ１１の圧縮
力によって圧縮リング８を通じて圧縮され、気密を保っ
ている。Here, the graphite seal 7 is compressed through the compression ring 8 by the compression force of the coil spring 11, thereby maintaining airtightness.
そして、リード線１６はチューブ１８によって全体を保
護されているがチューブ１８上から力が加わりリード線
１６に引張力が作用すると、集電管１９にロウ付けによ
って接合されている圧縮リング８が上方に引張られ、こ
のための圧縮リング８を介してグラファイトシール７に
負荷されている圧力が減じ、固体電解質１とグラファイ
トシール７との間の気密を達成することができないとと
いう欠点があった。The lead wire 16 is entirely protected by the tube 18, but when a force is applied from above the tube 18 and a tensile force is applied to the lead wire 16, the compression ring 8, which is joined to the current collector tube 19 by brazing, moves upward. The disadvantage is that the pressure applied to the graphite seal 7 through the compression ring 8 is reduced, making it impossible to achieve airtightness between the solid electrolyte 1 and the graphite seal 7.
そしてこれが内面電極３との導通にも悪影響をおよぼし
た。This also adversely affected the conduction with the inner surface electrode 3.
本考案は上記従来の欠点を解消することを目的として創
案されたものであり、以下本考案の一実施例について第
２図とともに上記と同一箇所には同一番号を付して説明
する。The present invention was devised for the purpose of eliminating the above-mentioned conventional drawbacks, and an embodiment of the present invention will be described below with reference to FIG. 2, with the same numbers assigned to the same parts as above.
本考案では第２図に示すように、従来の細い銅線を束に
したリード線の代りに、検出器本体付近にチューブ１８
の内径より小さい外径を有するコイルバネ２０をもつス
テンレス等の金属線２１を集電管１９上部でかしめるこ
とによって内面電極３の導通を取出している。In the present invention, as shown in Fig. 2, instead of the conventional lead wire made of a bundle of thin copper wires, a tube 18 is installed near the detector body.
A metal wire 21 made of stainless steel or the like having a coil spring 20 having an outer diameter smaller than the inner diameter of the coil spring 20 is caulked on the upper part of the current collector tube 19 to establish electrical conductivity of the inner electrode 3.
このように構成することにより、チューブ１８上から金
属線２１に引張力が加わっても該金属線２１が有するコ
イルバネ２０が伸びることによって、その引張力はチュ
ーブ１８に負荷され集電管１９には加わらない。With this configuration, even if a tensile force is applied to the metal wire 21 from above the tube 18, the coil spring 20 of the metal wire 21 stretches, and the tensile force is applied to the tube 18 and the current collector tube 19 is I won't join.
したがって、グラファイトシール７への圧縮力にはほと
んど影響がなく、初期の気密を保ち、モして導通性にも
悪影響を及ぼさない。Therefore, the compressive force on the graphite seal 7 is hardly affected, the initial airtightness is maintained, and the conductivity is not adversely affected.
以上のように本考案によれば、内面電極の導通を取るリ
ード線としてコイルバネを備えた金属線を用いるという
簡単な構成でもって初期の気密を減じることがなく、導
通性の劣化も生じない。As described above, according to the present invention, the simple structure of using a metal wire equipped with a coil spring as a lead wire for establishing conduction of the inner surface electrode does not reduce the initial airtightness and does not cause deterioration of conductivity.
そして従来の細い銅線を束にしたリード線よりもコスト
が低いという利点を有するものである。It also has the advantage of being lower in cost than conventional lead wires made of bundles of thin copper wires.
第１図は従来における酸素濃度検出器の断面図、第２図
は本考案に係る酸素濃度検出器の一実施例を示す断面図
である。
１・・・・・・固体電解質、２・・・・・・外面電極、
３・・・・・・内面電極、２０・・・・・・コイルバネ
、２１・・・・・・金属線、１８・・・・・・チューブ
。FIG. 1 is a cross-sectional view of a conventional oxygen concentration detector, and FIG. 2 is a cross-sectional view showing an embodiment of the oxygen concentration detector according to the present invention. 1... Solid electrolyte, 2... External electrode,
3...Inner electrode, 20...Coil spring, 21...Metal wire, 18...Tube.
Claims (1)
解質を用いて内燃機関の排ガス中に含まれた酸素濃度を
検出する酸素濃度検出器において、上記内面電極の導通
を取るリード線が、該リード線を保護するチューブ内径
より小さい外径を有するコイルバネであり、上記チュー
ブと空間的に分離されていることを特徴とする酸素濃度
検出器。In an oxygen concentration detector that detects the oxygen concentration contained in the exhaust gas of an internal combustion engine using an oxygen ion-conducting solid electrolyte that has electrodes on the inner and outer surfaces of a crucible, a lead wire that conducts the inner electrode is connected to the An oxygen concentration detector characterized in that it is a coil spring having an outer diameter smaller than the inner diameter of a tube that protects a lead wire, and is spatially separated from the tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3676579U JPS6017736Y2 (en) | 1979-03-19 | 1979-03-19 | oxygen concentration detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3676579U JPS6017736Y2 (en) | 1979-03-19 | 1979-03-19 | oxygen concentration detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55135975U JPS55135975U (en) | 1980-09-27 |
| JPS6017736Y2 true JPS6017736Y2 (en) | 1985-05-30 |
Family
ID=28898551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3676579U Expired JPS6017736Y2 (en) | 1979-03-19 | 1979-03-19 | oxygen concentration detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6017736Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60137363U (en) * | 1984-02-23 | 1985-09-11 | 日本碍子株式会社 | oxygen sensor |
-
1979
- 1979-03-19 JP JP3676579U patent/JPS6017736Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55135975U (en) | 1980-09-27 |
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