JPS59187252A - Oxygen sensor - Google Patents
Oxygen sensorInfo
- Publication number
- JPS59187252A JPS59187252A JP58060848A JP6084883A JPS59187252A JP S59187252 A JPS59187252 A JP S59187252A JP 58060848 A JP58060848 A JP 58060848A JP 6084883 A JP6084883 A JP 6084883A JP S59187252 A JPS59187252 A JP S59187252A
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- solid electrolyte
- oxygen sensor
- flange
- oxygen concentration
- 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.)
- Granted
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
- G01N27/4071—Cells and probes with solid electrolytes for investigating or analysing gases using sensor elements of laminated structure
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
【発明の詳細な説明】
本発明は固体電解質濃淡電池を用いて酸素濃度を検知す
る酸素センサに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oxygen sensor that detects oxygen concentration using a solid electrolyte concentration battery.
従来の、例えば自動車排ガス中の酸素濃度を検出する酸
素センサとして、排ガスの温度が約３００℃以下と低い
時でも作動させるためにヒーターを内蔵した加熱センサ
、あるいは空燃比が空気過剰の状態で用いるいわゆるリ
ーンバーンセンサ等が提案されている。これらのセンサ
の素子形状としては固体電解質が有底円筒の形状の他、
板状の固体電解質を積層した形状も提案されている。し
かし従来の板状の固体電解質を積層したセンサ素子は、
素子をセンサーのハウジング等の金具に固定するために
セメントで埋込む等の構造を用いており、製造しにくい
上、耐久性に乏しいものであった。さらにセンサ素子に
設りられた電極やヒータに接続するリード線の接続構造
は、固体電解質板上の電極上のリード部にリード線をロ
ウ付しており、製造困難で量産的でないばかりでなく、
自動車のように振動の激しい環境で用いるには耐久性に
ついて、信頼性に欠ける等の欠点があった。Conventional oxygen sensors that detect the oxygen concentration in automobile exhaust gas, for example, are heated sensors that have a built-in heater to operate even when the exhaust gas temperature is as low as about 300 degrees Celsius or lower, or are used when the air-fuel ratio is in excess of air. So-called lean burn sensors and the like have been proposed. The element shapes of these sensors include solid electrolyte shaped like a cylinder with a bottom,
A structure in which plate-shaped solid electrolytes are stacked has also been proposed. However, the conventional sensor element with laminated plate-shaped solid electrolytes is
In order to fix the element to metal fittings such as the sensor housing, a structure such as embedding with cement is used, which is difficult to manufacture and has poor durability. Furthermore, the connection structure for the lead wires that connect to the electrodes and heaters installed on the sensor element is such that the lead wires are brazed to the leads on the electrodes on the solid electrolyte plate, which is not only difficult to manufacture and not suitable for mass production. ,
It has drawbacks such as lack of durability and reliability when used in environments with strong vibrations such as automobiles.
本発明はこれらの欠点を解決するために完成されたもの
で、第１の発明は板状の固体電解質と、該固体電解質の
表面に設けられた測定電極と、該固体電解質に密接しま
たは該固体電解質とともに酸素濃淡電池を構成する他の
固体電解質に密接し、かつ前記測定電極と分離した基準
電極とで酸素濃淡電池を構成し、該酸素濃淡電池を構成
する固体電解質、または該酸素濃淡電池に隣接する固体
電解質に密接してヒータを設けた酸素センサ素子に、該
ヒータのリード線と電気的に接続する導電体を有する磁
器製フランジを前記酸素センサ素子の端部で固着し、該
フランジが固着された前記酸素センサ素子をハウジング
に組込んだことを基本的な構成とする酸素センサである
。The present invention was completed to solve these drawbacks, and the first invention includes a plate-shaped solid electrolyte, a measuring electrode provided on the surface of the solid electrolyte, and a measuring electrode that is in close contact with or on the surface of the solid electrolyte. A solid electrolyte that is in close contact with another solid electrolyte that constitutes an oxygen concentration battery together with a solid electrolyte, and that constitutes an oxygen concentration battery with a reference electrode that is separated from the measurement electrode, or a solid electrolyte that constitutes the oxygen concentration battery; A porcelain flange having a conductor electrically connected to a lead wire of the heater is fixed at an end of the oxygen sensor element to an oxygen sensor element having a heater provided in close contact with a solid electrolyte adjacent to the flange. The oxygen sensor has a basic structure in which the oxygen sensor element to which is fixed is assembled into a housing.
第１の発明の酸素センサでは、酸素センサ索子に￥Ｉｉ
累ポンプを構成する１対の電極を設（プて、この電極間
に直流電圧を印加して直流の電気量に比例した量の酸素
を固体電解質の一方の側に移動させることができる。In the oxygen sensor of the first invention, the oxygen sensor cord has ￥Ii
A pair of electrodes constituting a cumulative pump is provided, and by applying a DC voltage between the electrodes, an amount of oxygen proportional to the amount of DC electricity can be moved to one side of the solid electrolyte.
この構成においては酸素濃淡電池を構成する電極のうち
少なくとも１つと、酸素ポンプを構成する電極のうちの
少なくとも１つとを同一のものとすることができる。In this configuration, at least one of the electrodes that make up the oxygen concentration battery and at least one of the electrodes that make up the oxygen pump can be the same.
さらに第１の発明のＭ累ヒンサは、酸素濃淡電池を構成
する電極のうちの少なくとも１つ、および／または酸素
ポンプを構成する電極のうちの少なくとも１つをヒータ
と兼用することができる。Further, in the M-type heat sink of the first invention, at least one of the electrodes constituting the oxygen concentration battery and/or at least one of the electrodes constituting the oxygen pump can also be used as a heater.
第２の発明は、酸素濃淡電池に隣接する絶縁層に密接し
てヒータを設けた酸素センサ素子に、該ヒータのリード
線と電気的に接続する導電体を有する磁器製７ランジを
前記酸素センサ索子の端部で固着し、該フランジが固着
された前記酸素センサ索子をハウジングに組込んだこと
を基本的な構成とする酸素センサである。A second invention provides an oxygen sensor element in which a heater is provided in close contact with an insulating layer adjacent to an oxygen concentration battery, and seven porcelain flanges having a conductor electrically connected to a lead wire of the heater are attached to the oxygen sensor element. The oxygen sensor basically has a structure in which the oxygen sensor cord is fixed at the end of the cord and the flange is fixed, and the oxygen sensor cord is assembled into a housing.
この構成においては酸素センサ素子に酸素ポンプを構成
する１対の電極を設けることができ、さらに酸素濃淡電
池を構成する電極のうちの少なくとも１つと酸素バンプ
を構成する電極のうちの少なくとも１つを同一のものと
することができる。In this configuration, the oxygen sensor element can be provided with a pair of electrodes constituting the oxygen pump, and furthermore, at least one of the electrodes constituting the oxygen concentration battery and at least one of the electrodes constituting the oxygen bump can be provided. They can be the same.
本発明の酸素センサは、上記のいずれの構成においても
磁器製フランジの表面に設けられた導電体に磁器製７ラ
ンジの形状で位置決めされた金属端子を押圧して導電的
に接続させてハウジングに組込むことが望ましい。In any of the above configurations, the oxygen sensor of the present invention can be attached to a housing by pressing a metal terminal positioned in the shape of a seven-flange made of porcelain to a conductor provided on the surface of a porcelain flange to conductively connect it to the conductor. It is desirable to incorporate it.
本発明の実施例を第１図ないし第１１図を用いて詳細に
説明する。Embodiments of the present invention will be described in detail with reference to FIGS. 1 to 11.
本発明で用いる酸素センサ素子は、例えばその展開図で
ある第１図に示すような板状の固体電解質を用いた積層
された素子である。第１図に示づ゛ような素子上の構造
は以下のようになっている。The oxygen sensor element used in the present invention is a stacked element using plate-shaped solid electrolytes, as shown in FIG. 1, which is a developed view, for example. The structure on the element shown in FIG. 1 is as follows.
ジルコニア磁器等よりなる固体電解質２の両面に、例え
ば白金よりなる多孔質層の１対の電極３．４が設けられ
ていて酸素濃淡電池を構成している。A pair of electrodes 3.4 made of a porous layer made of, for example, platinum are provided on both sides of a solid electrolyte 2 made of zirconia porcelain or the like to constitute an oxygen concentration battery.
この電極３．４はそれぞれリード線が設けられており、
そのリード線の先端部３’ 、４’ は積層された素子
１の端面に露出するようになっている。Each of the electrodes 3.4 is provided with a lead wire,
The leading ends 3' and 4' of the lead wires are exposed to the end faces of the stacked elements 1.
そして電極３は例えばスピネル等よりなる多孔質セラミ
ック層５を介して被測定ガスに接触し、測定電極となる
。多孔質セラミック層５はジルコニア等によりなる気密
層６で囲まれている。電極４は中空部７に露呈しており
、中空部７は気密層８および別の気密層９で囲まれてい
る。中空部７には標準ガス、例えば大気が入り込むよう
になっていて電極４は基準電極となる。そしてさらに別
の気密層１０の表面には加熱用のヒータ１１が設【プら
れており、ヒータ１１の両端ｉｉ’ 、ｉｉ’ は素子
１の端面に露出するようになっている。ヒータ１１に通
電される電流は交流でも直流でもよい。直流のときは気
密層９．１０は例えばアルミナ磁器等の絶縁体でもよく
、交流のときは気密層９．１０はジルコニア磁器等の固
体電解質でもよい。Then, the electrode 3 comes into contact with the gas to be measured via a porous ceramic layer 5 made of spinel or the like, and becomes a measuring electrode. The porous ceramic layer 5 is surrounded by an airtight layer 6 made of zirconia or the like. The electrode 4 is exposed in a hollow part 7 , which is surrounded by a gas-tight layer 8 and a further gas-tight layer 9 . A standard gas, for example, the atmosphere, enters the hollow portion 7, and the electrode 4 serves as a reference electrode. Further, a heater 11 is provided on the surface of another airtight layer 10, and both ends ii' and ii' of the heater 11 are exposed to the end face of the element 1. The current applied to the heater 11 may be alternating current or direct current. In the case of direct current, the airtight layer 9.10 may be an insulator such as alumina porcelain, and in the case of alternating current, the airtight layer 9.10 may be a solid electrolyte such as zirconia porcelain.
そして素子上は破線で示すフランジ取付部１２の位置に
磁器製のフランジが取付けられる。A porcelain flange is mounted on the element at a flange mounting portion 12 indicated by a broken line.
フランジは例えば平面図の第２Ａ図、正面図の第２Ｂ図
、側面図の第２Ｃ図、下面図の第２Ｄ図に示すように素
子に取り付けられている。すなわちフランジ１３は素子
上にカラス層、無機接着剤等で固定されているか、ある
いは焼成前の成形体または仮焼品を接合し焼成して１体
に結合されている。フランジ表面には素子端面に露出し
ている電極または導電体の先端部に導電的に接触する導
電体が設けられている。例えば第１図に示すような素子
上に第２八図ないし第２Ｄ図に示すようなフランジを取
付ける場合、電極３．４より連なるリード線の先端３’
、４’ はフランジ表面上の導電体１４．１５に導電
的に接続している。そして抵抗体１１の両端１１’ 、
１１’ はフランジ表面上の導電体１６．１７に導電的
に接続している。フランジの材質はアルミナ等の絶縁性
磁器でもよく、ジルコニア等の固体電解質磁器でもよい
。ただし耐熱性と、ある稈度の絶縁−性が要求されるの
で磁器とする必要がある。導電体の材質はニッケル、銀
、金、白金、ロジウム、パラジウム、インジウム、ルテ
ニウム、タングステン、モリブデン等の金属あるいはこ
れらの合金が耐久性に優れて好ましいが、この伯の化合
物導電体、例えば酸化亜鉛、Ｌａ Ｃｒ ０３、ＬａＢ
５、ＳｉＣ等でもよい。The flange is attached to the element as shown in, for example, FIG. 2A in a plan view, FIG. 2B in a front view, FIG. 2C in a side view, and FIG. 2D in a bottom view. That is, the flange 13 is fixed onto the element with a glass layer, an inorganic adhesive, or the like, or is bonded into a single body by joining and firing a molded body or a calcined product before firing. A conductor is provided on the flange surface to conductively contact the tip of the electrode or conductor exposed on the end face of the element. For example, when attaching a flange as shown in FIGS. 28 to 2D on an element as shown in FIG. 1, the tip 3' of the lead wire connected from the electrode 3.4
, 4' are electrically conductively connected to the conductor 14.15 on the flange surface. And both ends 11' of the resistor 11,
11' is electrically conductively connected to a conductor 16.17 on the flange surface. The material of the flange may be insulating porcelain such as alumina, or solid electrolyte porcelain such as zirconia. However, it must be made of porcelain because it requires heat resistance and a certain degree of insulation. The material of the conductor is preferably a metal such as nickel, silver, gold, platinum, rhodium, palladium, indium, ruthenium, tungsten, molybdenum, or an alloy thereof due to its excellent durability. , La Cr 03, LaB
5.SiC etc. may also be used.
本発明のフランジ付素子をケーシングする際は、例えば
第３図に示すように、素子１についたフランジ１３が導
電体１４に導電的に接触しているコンタクトリング１８
と、導電体１６に導電的に接触している金属性端子１９
とではさまれ、ハウジング２０と碍管２１との間に固定
されている。金属製端子１９は第４図に示すようにマイ
カ、アルミナ磁器等の絶縁体２２で位置を固定されてい
る。そして金属製端子１９は碍管２１、ワッシャー２３
、碍管２４を介してキャップ２５と碍管２４の間にある
皿バネ２６によりフランジ１３上の導電体１６に押圧さ
れている。また金属製端子１９は導線２７を介して引出
線２８に導電的に接続されており、外部の回路につなが
っている。導電体１４はコンタク１〜リング１８、ハウ
ジング２０を介して接地されている。なお被測定ガスは
先端カバー２９の開口部３０を通って被測定ガス側空間
３１に入り、素子上の測定電極に達し、一方大気はキャ
ップ２５、ハウジング２０、碍管２１、フランジ１３等
の間のすきまから大気側空間３２に入り、素子上の基準
電極に達する。このとき被測定ガス側空間３１と大気側
空間３２とは７ランジ１３、コンタクトリング１８、ハ
ウジング２０により気密に遮断されている。When casing the flanged element of the present invention, for example, as shown in FIG.
and a metal terminal 19 in conductive contact with the conductor 16.
and is fixed between the housing 20 and the insulator tube 21. As shown in FIG. 4, the metal terminal 19 is fixed in position with an insulator 22 such as mica or alumina porcelain. The metal terminal 19 includes an insulator tube 21 and a washer 23.
, is pressed against the conductor 16 on the flange 13 via the insulator tube 24 by a disc spring 26 located between the cap 25 and the insulator tube 24. Further, the metal terminal 19 is electrically conductively connected to a lead wire 28 via a conductive wire 27, and is connected to an external circuit. The conductor 14 is grounded via the contacts 1 to the ring 18 and the housing 20. Note that the gas to be measured enters the gas-to-be-measured space 31 through the opening 30 of the tip cover 29 and reaches the measurement electrode on the element, while the atmosphere flows between the cap 25, housing 20, insulator tube 21, flange 13, etc. It enters the atmosphere side space 32 through the gap and reaches the reference electrode on the element. At this time, the measured gas side space 31 and the atmosphere side space 32 are hermetically sealed off by the seven flange 13, the contact ring 18, and the housing 20.
本発明の酸素センサは以上のＭ？Ｊ造に限定されるもの
ではなく、その他の構造もある。例えば第５八図ないし
第５Ｄ図に示すようなデーパ−のついた索子３３を用い
た構造ではフランジ３４の取付は位置を決めやすい。ま
たフランジ表面に設ける導電体の数も任意であり、例え
ば酸素ポンプを有する索子では酸素ポンプ用の電圧を印
加するための導電体が必要であり、逆に加熱用ヒータを
有しない素子ではそのための導電体は不要となる。また
、積層された素子の構造は例えば第６図ないし第９図の
ような構造でもよい。ヒータ１１が酸素濃淡電池を構成
する固体電解質２と同一の板の上に設けられた例を第６
図に示す。このにうな構造にすると固体電解質２を加熱
するためにヒータ１１に通電する電力を少なくすること
ができる。なおこのような構造では酸素濃淡電池の起電
力への影響を少なくするために加熱用電流は交流とする
のがよい。The oxygen sensor of the present invention has M? It is not limited to J-structure, and there are other structures as well. For example, in a structure using a tapered cord 33 as shown in FIGS. 58 to 5D, the mounting position of the flange 34 is easy to determine. The number of conductors provided on the flange surface is also arbitrary; for example, a conductor with an oxygen pump requires a conductor to apply voltage for the oxygen pump, and conversely, a device without a heater requires a conductor to apply the voltage for the oxygen pump. conductors are no longer required. Further, the structure of the stacked elements may be, for example, the structures shown in FIGS. 6 to 9. The sixth example shows an example in which the heater 11 is provided on the same plate as the solid electrolyte 2 constituting the oxygen concentration battery.
As shown in the figure. With this structure, the amount of power applied to the heater 11 for heating the solid electrolyte 2 can be reduced. In such a structure, the heating current is preferably alternating current in order to reduce the influence on the electromotive force of the oxygen concentration battery.
いわゆるリーンセンサ−として用いる素子の例を第７図
に示す。この構造では固体電解質２上に酸素濃淡電池を
構成づる１対の電極３．４と、酸素ポンプを構成する１
対の電極３５．４がある。但し一方の電極４は酸素濃淡
電池を構成づる１方の電極４と酸素ポンプを構成する１
方の電極４とが兼用となっている。この構造では被測定
ガスは拡散孔３６を通りキャビティ３７に達するが、酸
素ポンプの働きでキャビティ３７内の酸素分圧を実際の
被測定ガスの酸素分圧より低くできるので、酸素分圧が
理論空燃比の酸素分圧より高いリーン雰囲気の排気ガス
を発生するエンジンを制御覆るために用いられる。酸素
濃淡電池を構成する１対の電極３．４が設けられている
固体電解質２と酸素ポンプを構成する固体電解質３８が
別の板となっている例を第８図に示す。このような構造
は第７図に示した構造の変形でありこの素子の作用は第
７図に示した例と同様である。An example of an element used as a so-called lean sensor is shown in FIG. In this structure, a pair of electrodes 3.4 that constitute an oxygen concentration battery are placed on a solid electrolyte 2, and a pair of electrodes 3.4 that constitute an oxygen pump are disposed on a solid electrolyte 2.
There is a pair of electrodes 35.4. However, one electrode 4 constitutes an oxygen concentration battery and one electrode 4 constitutes an oxygen pump.
The other electrode 4 is also used. In this structure, the gas to be measured passes through the diffusion hole 36 and reaches the cavity 37, but the oxygen partial pressure in the cavity 37 can be made lower than the actual oxygen partial pressure of the gas to be measured by the action of the oxygen pump, so the oxygen partial pressure is lower than the theoretical one. It is used to control engines that produce lean atmosphere exhaust gases whose air-fuel ratio is higher than the oxygen partial pressure. FIG. 8 shows an example in which the solid electrolyte 2 provided with a pair of electrodes 3.4 constituting an oxygen concentration battery and the solid electrolyte 38 constituting an oxygen pump are separate plates. This structure is a modification of the structure shown in FIG. 7, and the operation of this element is similar to the example shown in FIG.
酸素濃淡電池の基準極側標準ガスとして大気を用いない
例を第９図に示す。２枚の固体電解質２．３８のうちの
一方に酸素濃淡電池を構成する１対の電極３．４を設け
、他の固体電解質３８に酸素ポンプを構成する。１対の
電極４．３５を設け、さらにこの２枚の固体電解質２．
３８を積層する。ここで２枚の固体電解質の間に入る電
極４は酸素濃淡電池を構成する一方の電極と酸素ポンプ
を構成する一方の電極とを兼用している。そしてこの電
極４の周囲のガスは酸素ポンプの働きで酸素分圧が富°
にＯになるようにされ、酸素分圧Ｏの状態を基準分圧と
する。このような構造の素子では基準極として大気を用
いる必要が無いので素子構造が簡単になり好ましいもの
である。FIG. 9 shows an example in which the atmosphere is not used as the standard gas on the reference electrode side of the oxygen concentration battery. One of the two solid electrolytes 2.38 is provided with a pair of electrodes 3.4 constituting an oxygen concentration battery, and the other solid electrolyte 38 constitutes an oxygen pump. A pair of electrodes 4.35 is provided, and these two solid electrolytes 2.
38 is laminated. Here, the electrode 4 inserted between the two solid electrolytes serves both as one electrode constituting an oxygen concentration battery and one electrode constituting an oxygen pump. The gas surrounding this electrode 4 is enriched with oxygen partial pressure due to the action of the oxygen pump.
The oxygen partial pressure O is set as the reference partial pressure. In an element having such a structure, there is no need to use the atmosphere as a reference pole, so the element structure is simple and preferred.
なお酸素ポンプの働きを逆にして基準極の酸素分圧をほ
ぼ大気圧に維持して用い“Ｃもよい。また２枚の固体電
解質２．３８を１枚とし、その固体電解質の中に電極４
、ヒータ１１を埋込／υでもよい。It is also possible to reverse the function of the oxygen pump and maintain the oxygen partial pressure at the reference electrode at approximately atmospheric pressure. 4
, the heater 11 may be embedded/υ.
酸素濃淡電池を構成する電極のうちの１つとヒータとを
兼ねた例を第１０図にしめす。固体電解質２の片面ずつ
に測定電極３と基準電極４を設けて酸素濃淡電池を構成
し、基準電極４はヒータを兼用している。FIG. 10 shows an example in which one of the electrodes constituting the oxygen concentration battery also serves as a heater. A measuring electrode 3 and a reference electrode 4 are provided on each side of the solid electrolyte 2 to constitute an oxygen concentration battery, and the reference electrode 4 also serves as a heater.
酸素濃淡電池を構成している測定電極と基準電極とが別
の固体電解質に設けられている例を第１１図に示す。こ
の構造では、固体電解質２、固体電解質よりなる気密層
８．９はそれぞれの密着された界面に垂直に酸素イオン
が通過できるようになっており、
測定電極３、固体電解質２、固体電解質よりなる気密層
８．９、基準電極４により酸素濃淡電池が構成されてい
る。ヒータ１１が設（プられている気密層１０は固体電
解質、絶縁層のいずれでもよい。FIG. 11 shows an example in which a measuring electrode and a reference electrode constituting an oxygen concentration battery are provided in separate solid electrolytes. In this structure, the solid electrolyte 2 and the airtight layer 8.9 made up of the solid electrolyte are configured so that oxygen ions can pass perpendicularly to their closely-adhered interfaces, and the measurement electrode 3 is made up of the solid electrolyte 2 and the solid electrolyte. The airtight layer 8.9 and the reference electrode 4 constitute an oxygen concentration cell. The airtight layer 10 on which the heater 11 is provided may be either a solid electrolyte or an insulating layer.
酸素濃淡電池を構成する測定電極と基準電極が固体電解
質の同じ面に設けられている例を第１２図に示す。固体
電解質２の上に設けられた測定電極３は多孔質セラミッ
ク層５を介して被測定ガスに接し、基準電８ｉ４は気密
層６．８で構成される中空部７に臨んでおり大気に接し
ている。気密層９は固体電解質でも絶縁層でもよい。FIG. 12 shows an example in which a measuring electrode and a reference electrode constituting an oxygen concentration battery are provided on the same surface of a solid electrolyte. The measurement electrode 3 provided on the solid electrolyte 2 is in contact with the gas to be measured through the porous ceramic layer 5, and the reference electrode 8i4 faces the hollow part 7 composed of the airtight layer 6.8 and is in contact with the atmosphere. ing. The airtight layer 9 may be a solid electrolyte or an insulating layer.
以上の説明から明らかなにうに、本発明の酸素センサは
、板状の固体電解質による酸素センＶ素子に磁器製のフ
ランジを設けたので、素子をハウジングに組込む工程が
容易になり、さらに振動等に対する耐久性が増し、その
上磁器製フランジ上に設けられた導電体を介して加熱用
電流の供給を行なうので信頼性の高い構成とすることが
できたものであり、本発明は産業の発達に寄与するとこ
ろ人なるもの、がある。As is clear from the above description, in the oxygen sensor of the present invention, a porcelain flange is provided on the oxygen sensor V element using a plate-shaped solid electrolyte, which facilitates the process of assembling the element into the housing, and further reduces vibration. In addition, since the heating current is supplied through the conductor provided on the porcelain flange, the present invention has a highly reliable structure. There are things that people contribute to.
第１図は本発明の、素子の一興体例の展開を示す説明図
、
第２八図ないし第２Ｄ図は本発明のフランジ付素子の一
具体例の平面図、正面図、側面図、下面図を示す説明図
、
第３図は本発明の酸素センサの組立構造を示す説明図、
第４図は本発明の金属端子を示す説明図、第５八図ない
し第５Ｄ図は本発明のフランシイ」素子の別の具体例の
平面図、正面図、側面図、下面図を示す説明図、
第６図ないし第１２図は本発明の素子の別の具体例の展
開を示す説明図である。
１・・・素子 ２・・・固体電解質３・・
・測定１Ｕｉ極 ４・・・基準電極３’、４’
・・・リード線の先端部
５・・・多孔質セラミック層
６．６′ ・・・気密層 ７・・・中空部８・・・気
密層 ９・・・気密層１０・・・気密層
１１・・・ヒータ１１′ ・・・ヒータの先端 １
２・・・フランジの取付部１３・・・フランジ
１４．１５．１６．１７・・・導電体１８・・・コンタ
クトリング１９・・・金属製端子２０・・・ハウジング
２１・・・碍管２２・・・絶縁体 ２３
・・・ワッシャー２４・・・碍管 ２５・・
・キャップ２６・・・冊バネ ２７・・・導線
２８・・・引出線 ２９・・・先端カバー３０
・・・開口部 ３１・・・被測定ガス側空間３
２・・・大気側空間 ３３・・・素子３４・・・フ
ランジ ３５・・・電極３５′ ・・・電極の先
端部 ３６・・・拡散孔３７・・・キャビティ ３
８・・・固体電解質３９・・・電極 ３９′
・・・電極の先端部。
第２図
（Ａ）
（Ｄ）
第５図
（Ａ）
（Ｂ ’） （Ｃ’ ＞
（Ｄ）
第９凶
第１０図FIG. 1 is an explanatory view showing the development of an example of an integrated element of the present invention, and FIGS. 28 to 2D are a plan view, a front view, a side view, and a bottom view of a specific example of the flanged element of the present invention. FIG. 3 is an explanatory diagram showing the assembly structure of the oxygen sensor of the present invention; FIG. 4 is an explanatory diagram showing the metal terminal of the present invention; FIGS. FIGS. 6 to 12 are explanatory diagrams showing a plan view, a front view, a side view, and a bottom view of another specific example of the element. FIGS. 6 to 12 are explanatory diagrams showing the development of another specific example of the element of the present invention. 1...Element 2...Solid electrolyte 3...
・Measurement 1Ui pole 4...Reference electrodes 3', 4'
... Lead wire tip 5 ... Porous ceramic layer 6.6' ... Airtight layer 7 ... Hollow part 8 ... Airtight layer 9 ... Airtight layer 10 ... Airtight layer
11... Heater 11'... Tip of heater 1
2...Flange mounting part 13...Flange
14.15.16.17...Conductor 18...Contact ring 19...Metal terminal 20...Housing 21...Insulator tube 22...Insulator 23
...Washer 24...Insulator tube 25...
・Cap 26...Book spring 27...Conductor wire 28...Leader wire 29...Tip cover 30
...Opening part 31...Measurement gas side space 3
2... Atmospheric side space 33... Element 34... Flange 35... Electrode 35'... Tip of electrode 36... Diffusion hole 37... Cavity 3
8...Solid electrolyte 39...Electrode 39'
...The tip of the electrode. Figure 2 (A) (D) Figure 5 (A) (B') (C'> (D) Figure 9 Figure 10
Claims (1)
れた測定電極と、該固体電解質に密接しまたは該固体電
解質とともに酸素濃淡電池を構成づる他の固体電解質に
密接しかつ前記測定電極と分離した基準電極とで酸素濃
淡電池を構成し、該酸素濃淡電池を構成づ−る固体電解
質または該酸素濃淡電池に隣接する固体電解質に密接し
てヒータを設けた酸素センサ素子に、該ヒータのリード
線と電気的に接続する導電体を有する磁器製フランジを
前記酸素センサ素子の咽部で固着し、該フランジが固着
された前記酸素センサ素子をハウジングに組込んだこと
を特徴とする酸素センサ。 ２、酸素センサ索子に酸素ポンプを構成する１対の電極
が設けられている特許請求の範囲第１項記載の酸素セン
サ。 ３、酸素濃淡電池を構成する電極のうちの少なくとも１
つと、酸素ポンプを構成する電極のうちの少なくとも１
つを同一のものとした特許請求の範囲第２項記載の酸素
センサ。 ４、酸素濃淡電池を構成する電極のうちの少なくとも１
つがヒータを兼ねる特許請求の範囲第１項ないし第３項
のいずれかに記載の酸素センサ。 ５、酸素ポンプを構成する電極のうちの少なくとも１つ
がヒータを兼ねる特許請求の範囲第２項ないし第４項の
いずれかに記載の酸素センサ。 ６、磁器製フランジの表面に設（ブられた導電体に磁器
製フランジの形状で位置決めされた金属端子を押圧して
導電的に接触させてハウジングに組込んだ特許請求の範
囲第１項ないし第５項のいずれかに記載の酸素センサ。 ７、板状の固体電解質と、該固体電解質の表面に設けら
れた測定電極と、該固体電解質に密接しまたは該固体電
解質とともに酸素濃淡電池を構成する他の固体電解質に
密接しかつ前記測定電極と分離した基準電極とで酸素濃
淡電池を構成し、該酸素濃淡電池に隣接する絶縁層に密
接してヒータを設けた酸素センサ素子に、該ヒータのリ
ード線と電気的に接続する４電体を有する磁器製フラン
ジを前記酸素センサ素子の端部で固着し、該フランジが
固着された前記酸素センサ素子をハウジングに組込んだ
ことを特徴とする酸素センサ。 ８、酸素センサ素子に酸素ポンプを構成する１対の電極
が設けられている特許請求の範囲第７項記載のＭ索セン
サ。 ９、酸素濃淡電池を構成する電極のうちの少なくとも１
つと、酸素ポンプを構成する電極のうちの少なくとも１
つとを同一のものとした特許請求の範囲第７項記載の酸
素センサ。 １０、磁器製フランジの表面に設けられた導電体に磁器
製フランジの形状で位置決めされた金属端子を押圧して
導電的に接触させてハウジングに組込んだ特許請求の範
囲第７項ないし第９項のいずれかに記載の酸素センサ。[Claims] 1. A plate-shaped solid electrolyte, a measurement electrode provided on the surface of the solid electrolyte, and another solid electrolyte that is in close contact with the solid electrolyte or constitutes an oxygen concentration battery together with the solid electrolyte. An oxygen concentration cell is constituted by a reference electrode which is in close contact with the measurement electrode and is separated from the measurement electrode, and a heater is provided in close proximity to the solid electrolyte constituting the oxygen concentration cell or the solid electrolyte adjacent to the oxygen concentration cell. A porcelain flange having a conductor that is electrically connected to the lead wire of the heater is fixed to the sensor element at the throat of the oxygen sensor element, and the oxygen sensor element to which the flange is fixed is incorporated into a housing. An oxygen sensor characterized by: 2. The oxygen sensor according to claim 1, wherein the oxygen sensor cord is provided with a pair of electrodes constituting an oxygen pump. 3. At least one of the electrodes constituting the oxygen concentration battery
and at least one of the electrodes constituting the oxygen pump.
The oxygen sensor according to claim 2, wherein the two are the same. 4. At least one of the electrodes constituting the oxygen concentration battery
The oxygen sensor according to any one of claims 1 to 3, wherein the oxygen sensor also serves as a heater. 5. The oxygen sensor according to any one of claims 2 to 4, wherein at least one of the electrodes constituting the oxygen pump also serves as a heater. 6. Claims 1 to 6, in which a metal terminal positioned in the shape of a porcelain flange is pressed onto the surface of the porcelain flange and is incorporated into the housing by pressing a metal terminal positioned in the shape of the porcelain flange to the cut conductor. Oxygen sensor according to any one of Item 5. 7. A plate-shaped solid electrolyte, a measurement electrode provided on the surface of the solid electrolyte, and an oxygen concentration battery in close contact with or together with the solid electrolyte. An oxygen concentration battery is configured with a reference electrode that is in close contact with another solid electrolyte that is separated from the measurement electrode, and a heater is provided in close proximity to an insulating layer adjacent to the oxygen concentration battery; A porcelain flange having four electric bodies electrically connected to the lead wires of the oxygen sensor element is fixed at an end of the oxygen sensor element, and the oxygen sensor element to which the flange is fixed is incorporated into a housing. Oxygen sensor. 8. The M-line sensor according to claim 7, wherein the oxygen sensor element is provided with a pair of electrodes forming an oxygen pump. 9. At least one of the electrodes forming an oxygen concentration battery.
and at least one of the electrodes constituting the oxygen pump.
The oxygen sensor according to claim 7, wherein the two are the same. 10. Claims 7 to 9, in which a metal terminal positioned in the shape of the porcelain flange is pressed against a conductor provided on the surface of the porcelain flange to bring it into conductive contact and incorporated into the housing. The oxygen sensor according to any of paragraphs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58060848A JPS59187252A (en) | 1983-04-08 | 1983-04-08 | Oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58060848A JPS59187252A (en) | 1983-04-08 | 1983-04-08 | Oxygen sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59187252A true JPS59187252A (en) | 1984-10-24 |
| JPH0410586B2 JPH0410586B2 (en) | 1992-02-25 |
Family
ID=13154201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58060848A Granted JPS59187252A (en) | 1983-04-08 | 1983-04-08 | Oxygen sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59187252A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61209352A (en) * | 1985-02-14 | 1986-09-17 | Ngk Insulators Ltd | Electrochemical apparatus and its preparation |
| JPS6276446A (en) * | 1985-09-30 | 1987-04-08 | Honda Motor Co Ltd | Method for controlling oxygen concentration sensor |
| JPS63149555A (en) * | 1986-12-13 | 1988-06-22 | Ngk Spark Plug Co Ltd | Assembling structure of detection element |
| JPH01221654A (en) * | 1988-03-01 | 1989-09-05 | Japan Electron Control Syst Co Ltd | Enzyme sensor for internal combustion engine |
| EP0390337A2 (en) * | 1989-03-31 | 1990-10-03 | General Motors Corporation | Oxygen sensor having a flat plate element and heater |
| JPH034262U (en) * | 1989-05-31 | 1991-01-17 | ||
| JP2007101387A (en) * | 2005-10-05 | 2007-04-19 | Ngk Insulators Ltd | Gas sensor element |
| JP2009180634A (en) * | 2008-01-31 | 2009-08-13 | Ngk Insulators Ltd | Plate-like sensor element |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55116248A (en) * | 1979-02-23 | 1980-09-06 | Bosch Gmbh Robert | Electrochemical feeler for measuring oxygen content of gas |
| JPS5827052A (en) * | 1981-08-12 | 1983-02-17 | Mitsubishi Electric Corp | Oxygen gas sensor |
-
1983
- 1983-04-08 JP JP58060848A patent/JPS59187252A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55116248A (en) * | 1979-02-23 | 1980-09-06 | Bosch Gmbh Robert | Electrochemical feeler for measuring oxygen content of gas |
| JPS5827052A (en) * | 1981-08-12 | 1983-02-17 | Mitsubishi Electric Corp | Oxygen gas sensor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61209352A (en) * | 1985-02-14 | 1986-09-17 | Ngk Insulators Ltd | Electrochemical apparatus and its preparation |
| JPS6276446A (en) * | 1985-09-30 | 1987-04-08 | Honda Motor Co Ltd | Method for controlling oxygen concentration sensor |
| JPS63149555A (en) * | 1986-12-13 | 1988-06-22 | Ngk Spark Plug Co Ltd | Assembling structure of detection element |
| JPH01221654A (en) * | 1988-03-01 | 1989-09-05 | Japan Electron Control Syst Co Ltd | Enzyme sensor for internal combustion engine |
| EP0390337A2 (en) * | 1989-03-31 | 1990-10-03 | General Motors Corporation | Oxygen sensor having a flat plate element and heater |
| JPH034262U (en) * | 1989-05-31 | 1991-01-17 | ||
| JP2007101387A (en) * | 2005-10-05 | 2007-04-19 | Ngk Insulators Ltd | Gas sensor element |
| JP2009180634A (en) * | 2008-01-31 | 2009-08-13 | Ngk Insulators Ltd | Plate-like sensor element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0410586B2 (en) | 1992-02-25 |
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