JPH0536212Y2 - - Google Patents
Info
- Publication number
- JPH0536212Y2 JPH0536212Y2 JP1984058190U JP5819084U JPH0536212Y2 JP H0536212 Y2 JPH0536212 Y2 JP H0536212Y2 JP 1984058190 U JP1984058190 U JP 1984058190U JP 5819084 U JP5819084 U JP 5819084U JP H0536212 Y2 JPH0536212 Y2 JP H0536212Y2
- Authority
- JP
- Japan
- Prior art keywords
- oxygen concentration
- output
- layer
- gas diffusion
- limiting current
- 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 - Lifetime
Links
- 229910052760 oxygen Inorganic materials 0.000 claims description 59
- 239000001301 oxygen Substances 0.000 claims description 59
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 55
- 238000009792 diffusion process Methods 0.000 claims description 39
- 239000007789 gas Substances 0.000 claims description 33
- 238000001514 detection method Methods 0.000 claims description 25
- 239000007784 solid electrolyte Substances 0.000 claims description 8
- 239000010410 layer Substances 0.000 description 29
- 239000000919 ceramic Substances 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- -1 oxygen ion Chemical class 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は限界電流式酸素濃度検出器に関するも
のである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a limiting current type oxygen concentration detector.
（従来の技術）
自動車などの内燃機関やボイラーなどに使用す
る酸素濃度検出器の一つとして、限界電流式酸素
濃度検出器が使用されている。この限界電流式酸
素濃度検出器に用いられる酸素濃度検出素子とし
ては、例えば板状ないしは柱状に成形した酸素イ
オン透過性固体電解質の両面に電圧を印加するた
めの電極層（表裏で一対となる）及びリード線を
設け、該電極層の陰極面上に酸素の流入を制限す
るための多孔性無機質コーテイング層を設けたも
のが挙げられる（例えば特開昭57−76450号公
報）。この場合無機質コーテイング層は例えばス
ピネルなどのセラミツクを溶射コーテイングする
ことによつて形成する。(Prior Art) A limiting current type oxygen concentration detector is used as one of the oxygen concentration detectors used in internal combustion engines such as automobiles, boilers, and the like. The oxygen concentration detection element used in this limiting current type oxygen concentration detector is, for example, an electrode layer (one pair on the front and back) for applying voltage to both sides of an oxygen ion permeable solid electrolyte formed into a plate or column shape. Examples include those in which a lead wire is provided and a porous inorganic coating layer is provided on the cathode surface of the electrode layer for restricting the inflow of oxygen (for example, JP-A-57-76450). In this case, the inorganic coating layer is formed by thermal spray coating of ceramic such as spinel.
（考案が解決しようとする課題）
しかして、最近の省エネルギー化傾向に伴い、
酸素濃度検出素子の加熱温度や排気ガス温度が低
下する傾向にあり、このため酸素濃度検器の低温
域（500〜600℃）における性能向上が重要な問題
となつている。このためには酸素濃度検出素子の
電気抵抗を下げる必要があり、その手段としては
例えば素子の壁厚を薄くすることが考えられるが
耐久性及び強度が問題となる。別の手段として電
極面積を増加させることが考えられるが、従来の
酸素濃度検出素子は出力（限界電流値）が電極面
積に比例するので、抵抗をさげるために電極面積
を大きくすると同時に出力も大きくなつてしま
い、素子の低温活性向上が図れなかつた。このた
め充分な性能を持たせるためには素子を高温
（700℃以上）に保持する必要があり、ヒータの消
費電力や耐久性の点で問題があつた。又、酸素濃
度検出素子の製造の際に個々の素子の出力にある
程度のばらつきが生じるが、素子の出力は素子を
一旦製造した後測定してみなければ判らないの
で、製造と同時に素子の出力を所定の値に調整す
ることは実際上困難である。(Problem that the invention attempts to solve) However, with the recent trend toward energy conservation,
The heating temperature of oxygen concentration detection elements and the temperature of exhaust gas tend to decrease, and therefore improving the performance of oxygen concentration detectors in the low temperature range (500 to 600°C) has become an important issue. For this purpose, it is necessary to lower the electrical resistance of the oxygen concentration detection element, and one possible means for this is, for example, to reduce the wall thickness of the element, but durability and strength become problems. Another method would be to increase the electrode area, but since the output (limiting current value) of conventional oxygen concentration detection elements is proportional to the electrode area, increasing the electrode area and increasing the output at the same time to reduce resistance. This made it impossible to improve the low-temperature activity of the device. Therefore, in order to provide sufficient performance, it was necessary to maintain the element at a high temperature (700°C or higher), which caused problems in terms of power consumption and durability of the heater. In addition, when manufacturing oxygen concentration detection elements, some variation occurs in the output of each individual element, but the output of the element cannot be determined until it is measured after the element has been manufactured. It is practically difficult to adjust the value to a predetermined value.
本考案は上記従来技術の問題点を解決するため
のものであり、その目的とするところは酸素濃度
検出素子の出力を増加させることなく低温域にお
ける性能を向上させることができ、又、酸素濃度
検出素子の出力を容易に所定の値に調整すること
ができるため品質が向上した酸素濃度検出器を提
供することにある。 The present invention is intended to solve the problems of the prior art described above, and its purpose is to improve the performance in a low temperature range without increasing the output of the oxygen concentration detection element, and to improve the performance of the oxygen concentration detection element in a low temperature range. An object of the present invention is to provide an oxygen concentration detector whose quality is improved because the output of a detection element can be easily adjusted to a predetermined value.
（課題を解決するための手段）
すなわち本考案の限界電流式酸素濃度検出器
は、酸素イオン透過性固体電解質の両面に表裏で
一対となる陽電極及び陰電極を形成し、該陰電極
上にガス拡散律速層を形成し、該ガス拡散律速層
上に更に該ガス拡散律速層の一部が露出するよう
に露出部分を設けてガス不透過層を形成せしめて
なる酸素濃度検出素子を備えた限界電流式酸素濃
度検出器において、
前記露出部分が、一つの拡散孔又は拡散溝と、
順次塞ぐことによつて前記酸素濃度検出素子の出
力を段階的に調節し得る複数の出力調整孔とから
なることを特徴とする。(Means for Solving the Problems) That is, the limiting current type oxygen concentration detector of the present invention has a pair of positive and negative electrodes formed on both sides of an oxygen ion-permeable solid electrolyte, and a pair of positive and negative electrodes on the negative electrodes. An oxygen concentration detection element is provided, in which a gas diffusion regulating layer is formed, and an exposed portion is further provided on the gas diffusion regulating layer so that a part of the gas diffusion regulating layer is exposed to form a gas impermeable layer. In the limiting current type oxygen concentration detector, the exposed portion has one diffusion hole or diffusion groove;
It is characterized by comprising a plurality of output adjustment holes that can stepwise adjust the output of the oxygen concentration detection element by sequentially closing them.
ガス不透過層は例えばアルミナ、シリカ等のセ
ラミツクで排気ガス中の酸素や一酸化炭素等のガ
スを透過させない緻密な構造を有し一部に孔を設
けた円板状、円筒状等の所定形状の成形体を作つ
ておき、ガス拡散律速層に覆いかぶせてもよい
し、又はセラミツク、ガラス等のペーストをガス
拡散律速層上に塗布し、乾燥後焼成して形成して
もよい。又は粒径や材質を最適に選択したセラミ
ツク等を用いて溶射コーテイングにより形成して
もよい。ペーストを使用したり、溶射コーテイン
グによりガス不透過層を形成する場合にはガス拡
散律速層の露出部分を形成するため、適当な材料
を用いて予めガス拡散律速層を覆つておくように
するとよい。 The gas-impermeable layer is made of ceramic such as alumina or silica, and has a dense structure that does not allow gases such as oxygen and carbon monoxide in the exhaust gas to permeate. A shaped body may be made in advance and placed over the gas diffusion regulating layer, or a paste of ceramic, glass, etc. may be applied onto the gas diffusion regulating layer, dried and then fired. Alternatively, it may be formed by thermal spray coating using ceramic or the like whose particle size and material are optimally selected. When forming a gas-impermeable layer using a paste or thermal spray coating, it is recommended to cover the gas diffusion-limiting layer with a suitable material in advance to form the exposed part of the gas-diffusion-limiting layer. .
拡散孔又は拡散溝は、適する大きさ及び形状の
ものを一つ、ガス拡散律速層上の適切な位置に設
ける。ガス拡散律速層の露出比率は酸素濃度検出
器の所望の出力特性が得られるように設定する。 One diffusion hole or diffusion groove of a suitable size and shape is provided at a suitable position on the gas diffusion control layer. The exposure ratio of the gas diffusion control layer is set so as to obtain the desired output characteristics of the oxygen concentration detector.
又出力調整孔も、適する大きさ及び形状のもの
を複数（２個以上の適切な数）、拡散孔又は拡散
溝に対して所定の位置に配置する。出力調整孔の
数は、その半分の数を塞いだ場合に適切な素子出
力が得られるように選択すると実用上都合が良
い。出力調整孔は、製造した素子の出力を確認し
た後、素子の出力が所望の出力となるようにセラ
ミツクペーストやガラスペーストを用いて塞ぐ。 Also, a plurality of output adjustment holes (an appropriate number of two or more) of suitable sizes and shapes are arranged at predetermined positions with respect to the diffusion holes or diffusion grooves. It is practically convenient to select the number of output adjustment holes so that an appropriate element output can be obtained when half of the number is closed. After confirming the output of the manufactured element, the output adjustment hole is plugged with ceramic paste or glass paste so that the output of the element becomes the desired output.
（作用）
拡散孔又は拡散溝によつて、酸素濃度検出素子
の出力を増加させることなく低温域における酸素
濃度検出器の性能を向上させることができ、又、
出力調整孔によつて、酸素濃度検出素子の出力を
容易に所定の値に調整することができる。(Function) The diffusion hole or the diffusion groove can improve the performance of the oxygen concentration detector in a low temperature range without increasing the output of the oxygen concentration detection element, and
The output adjustment hole allows the output of the oxygen concentration detection element to be easily adjusted to a predetermined value.
（実施例）
以下の実施例において図面に基づいて本考案を
更に詳細に説明する。(Example) The present invention will be explained in further detail in the following example based on the drawings.
第１図は本考案の限界電流式酸素濃度検出器の
検出素子の一例（円板状素子）の部分構造を示
す。ジルコニア、イツトリア等の酸素イオン透過
性固体電解質１の両面に白金電極を用いて陰電極
２及び陽電極３を形成し、陰電極２上にセラミツ
クの溶射コーテイングを行つてガス拡散律速層４
を設け、更にその上の中央部に１箇所及びその周
囲に４箇所、所定の大きさ及び形状の紙などの可
燃物を貼付し、残りの部分にセラミツクペースト
を塗布して乾燥した後焼成してガス不透過層５を
形成した。これにより、中央部には下層のガス拡
散律速層４が露出した拡散孔６が形成された。ま
た、拡散孔６の周囲には下層のガス拡散律速層４
が露出した出力調整孔７が形成された。なお、ガ
ス拡散律速層４としては所望の細孔径及び厚さを
有するセラミツクフイルタを用いてもよい。 FIG. 1 shows a partial structure of an example of a detection element (disk-shaped element) of the limiting current type oxygen concentration detector of the present invention. A negative electrode 2 and a positive electrode 3 are formed using platinum electrodes on both sides of an oxygen ion permeable solid electrolyte 1 such as zirconia or itria, and a ceramic spray coating is applied on the negative electrode 2 to form a gas diffusion control layer 4.
A flammable material such as paper of a predetermined size and shape is pasted on it in one place in the center and four places around it, and ceramic paste is applied to the remaining parts, dried and then fired. A gas impermeable layer 5 was formed. As a result, a diffusion hole 6 was formed in the central portion, in which the lower gas diffusion control layer 4 was exposed. In addition, a lower gas diffusion control layer 4 is provided around the diffusion hole 6.
An output adjustment hole 7 was formed in which the output adjustment hole 7 was exposed. Note that a ceramic filter having a desired pore diameter and thickness may be used as the gas diffusion control layer 4.
第２図は第１図の検出素子の破断斜視図であ
り、素子の半分側を表わす。又、第３図は第１図
の検出素子の平面図を表わす。 FIG. 2 is a cutaway perspective view of the detection element of FIG. 1, showing a half side of the element. Further, FIG. 3 shows a plan view of the detection element shown in FIG. 1.
検出素子の出力を測定しながらセラミツクペー
スト又はガラスペーストにより出力調整孔７を塞
ぐことにより、個々の製品の出力のばらつきを少
なくすることができる。 By blocking the output adjustment hole 7 with ceramic paste or glass paste while measuring the output of the detection element, variations in the output of individual products can be reduced.
第４図は一端が閉じた円筒状の酸素イオン透過
性固体電解質１′を用いて製造した検出素子の一
例である。本例ではガス不透過層５の一部に円周
方向に沿つて拡散溝８を設けた。又、４個の出力
調整孔７を拡散溝８の図中上側に円周方向に沿つ
て設けた。 4 shows an example of a detection element manufactured using a cylindrical oxygen ion-permeable solid electrolyte 1' with one end closed. In this example, a diffusion groove 8 is provided along the circumferential direction in a part of the gas impermeable layer 5. In addition, four output adjustment holes 7 are provided along the circumferential direction above the diffusion groove 8 in the figure.
第５図は上記において製造した酸素濃度検出素
子（円板状素子）を取り付けた本考案の限界電流
式酸素濃度検出器の一実施例である。図中、９は
素子、１０，１０′はリード線、１１は発熱体、
１２はアルミナ絶縁体、１３は溶接部、１４は通
気孔、１５は保護カバー、１６は導線、１７はコ
ネクター、１８はフランジ、１９は取付け孔、２
０は防水チユーブ、２１，２２はブツシユ、２３
は絶縁用ラバーチユーブを示す。 FIG. 5 shows an embodiment of the limiting current type oxygen concentration detector of the present invention, which is equipped with the oxygen concentration detection element (disc-shaped element) manufactured above. In the figure, 9 is an element, 10, 10' are lead wires, 11 is a heating element,
12 is an alumina insulator, 13 is a welded part, 14 is a ventilation hole, 15 is a protective cover, 16 is a conductor, 17 is a connector, 18 is a flange, 19 is a mounting hole, 2
0 is waterproof tube, 21, 22 is bush, 23
indicates an insulating rubber tube.
＜性能比較試験＞
第６図に従来の限界電流式酸素濃度検出器の印
加電圧と出力電流との関係を示す。従来の限界電
流式酸素濃度検出器においては検出素子の温度が
低いときは素子の抵抗が大きくＶ−Ｉ特性曲線の
直線部分の傾きが小さくなるため素子の印加電圧
を一定値ａに固定した場合には図中の各酸素濃度
における平坦部との交点で表わされる限界電流
（出力）と酸素濃度との関係は第７図における破
線で示すように直線的ではなくなる。この場合、
電極面積を増加させて抵抗を下げても第８図に示
すように各酸素濃度における出力も増加するため
直線性を有する測定範囲は変わらない。しかし、
本考案の限界電流式酸素濃度検出器においてはガ
ス拡散律速層の上にその一部が露出するようにガ
ス不透過層を形成することにより出力を増加させ
ることなく電極面積を増加させて素子の抵抗を減
少させたので第９図に示すように一定の印加電圧
ａにおいて限界電流を測定しうる酸素濃度範囲が
増加し、第７図の実線で示すように従来よりもよ
り広範囲な酸素濃度範囲で正確な測定が可能とな
つた。<Performance Comparison Test> Figure 6 shows the relationship between applied voltage and output current of a conventional limiting current type oxygen concentration detector. In conventional limiting current type oxygen concentration detectors, when the temperature of the detection element is low, the resistance of the element is large and the slope of the straight line part of the V-I characteristic curve is small, so when the voltage applied to the element is fixed at a constant value a. In this case, the relationship between the limiting current (output) represented by the intersection with the flat portion at each oxygen concentration in the figure and the oxygen concentration is no longer linear as shown by the broken line in FIG. in this case,
Even if the electrode area is increased and the resistance is lowered, the output at each oxygen concentration also increases as shown in FIG. 8, so the measurement range with linearity remains unchanged. but,
In the limiting current type oxygen concentration sensor of the present invention, a gas impermeable layer is formed on top of the gas diffusion control layer so that a portion of the layer is exposed, thereby increasing the electrode area without increasing the output. By reducing the resistance, the oxygen concentration range in which the limiting current can be measured at a constant applied voltage a increases as shown in Figure 9, and as shown by the solid line in Figure 7, the oxygen concentration range is wider than before. It became possible to make accurate measurements.
（考案の効果）
上述のように本考案の限界電流式酸素濃度検出
器は、ガス拡散律速層上に更に該ガス拡散律速層
の一部が露出するように露出部分を設けてガス不
透過層を形成せしめ、且つ前記露出部分が、一つ
の拡散孔又は拡散溝と、順次塞ぐことによつて前
記酸素濃度検出素子の出力を段階的に調節し得る
複数の出力調整孔とからなるものであるため、素
子の出力を増加させることなく電極面積を増加さ
せることにより電気抵抗値を減少させることがで
き、600℃程度の従来よりも低い温度領域におけ
る性能が向上し、従来よりも更に広範囲にわたつ
て酸素濃度を正確に測定することができるため検
出器の信頼性が向上するとともに自動車などの車
両やボイラーなどの運転変動に対してより正確に
対処することが可能となつた。(Effect of the invention) As described above, the limiting current type oxygen concentration detector of the present invention further includes an exposed portion on the gas diffusion regulating layer so that a part of the gas diffusion regulating layer is exposed, and a gas impermeable layer. and the exposed portion is made up of one diffusion hole or diffusion groove and a plurality of output adjustment holes that can stepwise adjust the output of the oxygen concentration detection element by sequentially closing them. Therefore, the electrical resistance value can be reduced by increasing the electrode area without increasing the output of the element, improving performance in the lower temperature range of about 600°C than before, and enabling use over a wider range than before. This makes it possible to accurately measure oxygen concentration, improving the reliability of the detector and making it possible to more accurately respond to operating fluctuations in vehicles such as automobiles and boilers.
又、本考案の限界電流式酸素濃度検出器は従来
の限界電流式酸素濃度検出器に比べて低い温度領
域における性能が向上しているため、検出器の作
動温度をより低温側に設定することができ、素子
を加熱するためのヒータの消費電力を少なくする
ことができるとともにヒータや素子の熱劣化がほ
とんどなくなつたため検出器の寿命が長くなつ
た。 Furthermore, since the limiting current type oxygen concentration detector of the present invention has improved performance in a low temperature range compared to conventional limiting current type oxygen concentration detectors, the operating temperature of the detector can be set to a lower temperature side. As a result, the power consumption of the heater for heating the element can be reduced, and thermal deterioration of the heater and element is almost eliminated, resulting in a longer lifespan of the detector.
更に、ガス不透過層に設けるガス拡散孔又はガ
ス拡散溝の近傍、例えばその周辺に複数の出力調
整孔を設けることができるため、個々の酸素濃度
検出器の出力が所望の値と異なる場合においても
出力調整孔を順次塞ぐことにより簡便迅速に出力
の微調整（段階的調整）が可能であり、個々の酸
素濃度検出器の性能のばらつきを少なくし、常に
一定品質の酸素濃度検出器を製造することができ
るため品質管理の面でも大きな効果を奏する。 Furthermore, since a plurality of output adjustment holes can be provided in the vicinity of the gas diffusion holes or gas diffusion grooves provided in the gas impermeable layer, for example, in the vicinity thereof, even if the output of each oxygen concentration detector differs from the desired value, By sequentially closing the output adjustment holes, it is possible to easily and quickly fine-tune the output (stepwise adjustment), which reduces variations in the performance of individual oxygen concentration detectors and allows us to always manufacture oxygen concentration detectors of constant quality. This has great effects in terms of quality control.
第１図は円板状の固体電解質を用いて製造した
検出素子の一例の部分断面図、第２図は第１図の
検出素子の半分側を表わす破断斜視図、第３図は
第１図の検出素子の平面図、第４図は一端が閉じ
た円筒状の固体電解質を用いて製造した検出素子
の一例の斜視図、第５図は本考案の限界電流式酸
素濃度検出器の一実施例の断面図、第６図は従来
の限界電流式酸素濃度検出器の印加電圧と出力電
流との関係を示す図、第７図は本考案及び従来の
限界電流式酸素濃度検出器の低温における酸素濃
度と限界電流（出力）の関係を示す図、第８図は
従来の限界電流式酸素濃度検出器の第６図におけ
る場合よりも更に電極面積を大きくした場合にお
ける印加電圧と出力電流との関係を示す図、第９
図は本考案の限界電流式酸素濃度検出器の印加電
圧と出力電流との関係を示す図である。
図中、１，１′……酸素イオン透過性固体電解
質、２……陰電極、３……陽電極、４……ガス拡
散律速層、５……ガス不透過層、６……拡散孔、
７……出力調整孔、８……拡散溝、９……素子、
１０，１０′……リード線、１１……発熱体、１
２……アルミナ絶縁体、１３……溶接部、１４…
…通気孔、１５……保護カバー、１６……導線、
１７……コネクター、１８……フランジ、１９…
…取付け孔、２０……防水チユーブ、２１，２２
……ブツシユ、２３……絶縁用ラバーチユーブ。
Fig. 1 is a partial cross-sectional view of an example of a detection element manufactured using a disk-shaped solid electrolyte, Fig. 2 is a cutaway perspective view showing a half side of the detection element in Fig. 4 is a perspective view of an example of a detection element manufactured using a cylindrical solid electrolyte with one end closed, and FIG. 5 is an implementation of the limiting current type oxygen concentration detector of the present invention. 6 is a diagram showing the relationship between the applied voltage and the output current of the conventional limiting current type oxygen concentration detector, and FIG. 7 is a diagram showing the relationship between the applied voltage and the output current of the conventional limiting current type oxygen concentration detector, and FIG. 7 is a diagram showing the relationship between the present invention and the conventional limiting current type oxygen concentration detector at low temperatures. Figure 8, a diagram showing the relationship between oxygen concentration and limiting current (output), shows the relationship between applied voltage and output current when the electrode area is made even larger than that shown in Figure 6 for a conventional limiting current type oxygen concentration detector. Diagram showing relationships, No. 9
The figure is a diagram showing the relationship between the applied voltage and the output current of the limiting current type oxygen concentration detector of the present invention. In the figure, 1, 1'...Oxygen ion permeable solid electrolyte, 2...Nathode, 3...Positive electrode, 4...Gas diffusion control layer, 5...Gas impermeable layer, 6...Diffusion hole,
7... Output adjustment hole, 8... Diffusion groove, 9... Element,
10, 10'...Lead wire, 11...Heating element, 1
2...Alumina insulator, 13...Welded part, 14...
...Vent hole, 15...Protective cover, 16...Conductor,
17... Connector, 18... Flange, 19...
...Mounting hole, 20...Waterproof tube, 21, 22
...button, 23...rubber tube for insulation.
Claims (1)
対となる陽電極及び陰電極を形成し、該陰電極上
にガス拡散律速層を形成し、該ガス拡散律速層上
に更に該ガス拡散律速層の一部が露出するように
露出部分を設けてガス不透過層を形成せしめてな
る酸素濃度検出素子を備えた限界電流式酸素濃度
検出器において、 前記露出部分が、一つの拡散孔又は拡散溝と、
順次塞ぐことによつて前記酸素濃度検出素子の出
力を段階的に調節し得る複数の出力調整孔とから
なることを特徴とする限界電流式酸素濃度検出
器。[Claims for Utility Model Registration] A pair of positive and negative electrodes are formed on both sides of an oxygen ion permeable solid electrolyte, a gas diffusion controlling layer is formed on the negative electrode, and a gas diffusion controlling layer is formed on the gas diffusion controlling layer. A limiting current type oxygen concentration detector further includes an oxygen concentration detection element formed by providing an exposed portion so that a part of the gas diffusion control layer is exposed to form a gas impermeable layer, wherein the exposed portion is one diffusion hole or diffusion groove;
A limiting current type oxygen concentration detector comprising a plurality of output adjustment holes that can stepwise adjust the output of the oxygen concentration detection element by sequentially closing the holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5819084U JPS60170770U (en) | 1984-04-20 | 1984-04-20 | oxygen concentration detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5819084U JPS60170770U (en) | 1984-04-20 | 1984-04-20 | oxygen concentration detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60170770U JPS60170770U (en) | 1985-11-12 |
| JPH0536212Y2 true JPH0536212Y2 (en) | 1993-09-13 |
Family
ID=30583457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5819084U Granted JPS60170770U (en) | 1984-04-20 | 1984-04-20 | oxygen concentration detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60170770U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0762662B2 (en) * | 1986-01-24 | 1995-07-05 | 株式会社フジクラ | Gas sensor element and gas concentration measuring method |
| JP2805811B2 (en) * | 1989-04-11 | 1998-09-30 | 松下電器産業株式会社 | Combustion control sensor |
| DE10259526A1 (en) * | 2002-12-19 | 2004-07-15 | Robert Bosch Gmbh | sensor element |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57182156A (en) * | 1981-05-01 | 1982-11-09 | Toyota Central Res & Dev Lab Inc | Oxygen concentration sensor |
-
1984
- 1984-04-20 JP JP5819084U patent/JPS60170770U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57182156A (en) * | 1981-05-01 | 1982-11-09 | Toyota Central Res & Dev Lab Inc | Oxygen concentration sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60170770U (en) | 1985-11-12 |
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