JPS61502702A - Sensor that measures oxygen content in gas - Google Patents
Sensor that measures oxygen content in gasInfo
- Publication number
- JPS61502702A JPS61502702A JP60503094A JP50309485A JPS61502702A JP S61502702 A JPS61502702 A JP S61502702A JP 60503094 A JP60503094 A JP 60503094A JP 50309485 A JP50309485 A JP 50309485A JP S61502702 A JPS61502702 A JP S61502702A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- sensor
- item
- tube
- protection tube
- 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
- 239000007789 gas Substances 0.000 title claims description 47
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims description 8
- 239000001301 oxygen Substances 0.000 title claims description 8
- 229910052760 oxygen Inorganic materials 0.000 title claims description 8
- 230000001681 protective effect Effects 0.000 claims description 22
- 238000005259 measurement Methods 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 230000001154 acute effect Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 239000011343 solid material Substances 0.000 claims 1
- 239000007784 solid electrolyte Substances 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 238000011109 contamination Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000010987 cubic zirconia Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるため要約のデータは記録されません。 (57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 ガス中の酸素含量を測定するセンサ 技術水準 本発明は請求の範囲第１項の概念によるガス中の酸素含量を測定するセンサに関 する。この種のセンサはすでに公知であり（西独特許ｇ２５３８５３６号明細書 ）、このセンサはほぼセラミック材料からなる測定要素（固体電解質管）の管状 金属ケーシングから測定ガス側に突出する部分を離れて包囲する保護管を有する 。この保護管はその側壁に測定ガスの入口として多数の孔を有し、測定ガス側底 部に測定ガスの出口として小直径の孔を有する。保護管の側壁管にある孔は、測 定ガスを保護管の内面に対しほぼ接線方向に導き、それによって測定要素を測定 ガスに含まれる固体粒子による＠−Ｓから十分保護するように、保護管に形成さ れる。[Detailed description of the invention] Sensor that measures oxygen content in gas technical level The present invention relates to a sensor for measuring oxygen content in a gas according to the concept of claim 1. do. This type of sensor is already known (West German patent specification G2538536). ), the sensor consists of a tubular measuring element (solid electrolyte tube) made of approximately ceramic material. It has a protective tube that separates and surrounds the part that protrudes from the metal casing toward the measurement gas side. . This protection tube has many holes on its side wall as an inlet for the measuring gas, and the bottom of the measuring gas side. It has a small-diameter hole as an outlet for the measuring gas. The hole in the side wall tube of the protection tube A constant gas is guided approximately tangentially to the inner surface of the protection tube, thereby measuring the measuring element. Formed in the protective tube to provide sufficient protection from @-S caused by solid particles contained in the gas. It will be done.
請求の範囲第１項の特徴を有する本発明のセンサはこれに反し測定ガスの測定要 素に対する案内が異なるため、かつ保護管の特殊な形成により測定要素の汚染ま たは中毒（オイルアツシ、鉛の反応生成物、エンジンの弁等の金属ダスト）が著 しく減少し、これが著しい寿命延長に貢献する利点を有する。他の利点として保 護管が前記性質のため代表的でない測定がスピークの際の誤制御を防ぎ、かつ高 い酸素含量から低い酸素含量の方向およびその逆の応答時間が同じ長さであるこ とを可能にし、それによって電子評価回路の簡単化をもたらすことが挙げられる 。測定要素が抵抗加熱要素を備える場合、この保護管のためさらにエネルギー節 約が生ずる。On the contrary, the sensor of the present invention having the features set forth in claim 1 does not Due to the different guidance for the element and the special design of the protective tube, contamination or contamination of the measuring element is avoided. or poisoning (oil build-up, lead reaction products, metal dust from engine valves, etc.) This has the advantage of significantly extending the service life. Another advantage is that Due to the above-mentioned properties of the protection tube, non-representative measurements can prevent incorrect control when speaking, and The response time from high to low oxygen content and vice versa should be the same length. and thereby simplify the electronic evaluation circuit. . If the measuring element is equipped with a resistive heating element, additional energy savings can be achieved due to this protective tube. A contract arises.
図面 本発明の実施例を図面に示し、以下の記載で詳細に説明する。図面はセンサの側 面を拡大して示し、センサの測定ガス側端部は縦断面として示される。drawing Embodiments of the invention are shown in the drawings and are explained in more detail in the description below. The drawing is on the sensor side The plane is shown enlarged, and the end of the sensor on the measuring gas side is shown as a longitudinal section.
実施例の記載 ガス中の酸素含量を測定する図示のセンサ１０はとくに内燃機関の排ガス中で使 用することが予期される；このようなセンサ１０の原理的構造はすでに西独実用 新案第８１０１５８４号明細書から公知である。このセンサ１０はイオン電導性 固体電解質を有する酸素濃淡電池の公知原理により動作する；固体電解質として はとくに安定化した立方晶系２酸化ジルコニウムが使用される。固体電解質はこ の例では測定ガス側に膝部１２を有する固体電解質管１１として形成される。Description of examples The illustrated sensor 10 for measuring the oxygen content in a gas is used in particular in the exhaust gas of an internal combustion engine. The basic structure of such a sensor 10 has already been put into practical use in West Germany. It is known from the patent specification No. 8101584. This sensor 10 is ionic conductive. Operates on the known principle of oxygen concentration batteries with solid electrolyte; In particular, stabilized cubic zirconium dioxide is used. solid electrolyte In this example, it is formed as a solid electrolyte tube 11 having a knee portion 12 on the measurement gas side.
この固体電解質管１１の外面および内面の層状電極の表示および測定ガスにさら される電極の保護層は省略した；これらの電極はとくに多孔性の層とじて固体電 解質管１１に被覆され、公知法で電気的接続部と接続し、その少なくとも１つは 接続側ケーブル１３に通ずる：通常固体電解質管１１の外面にある触媒作用を有 する電極は電気的にアースした金属ケーシング１４と接続している。固体電解質 管１１の内部空間１５へ棒状の抵抗加熱要素１６が突入し、この要素は内部空間 １５をほぼ充てんし、固体電解質管１１の底部１２近くまで達する：しかしこの センサ１０の多くの使用の場合、抵抗加熱要素１６の配置は省略することができ る。固体電解質管１１の内部空間１５は参照ガス（たとえば空気）にさらされ、 このガスは前記の図示されていない対極と接触している。とのセンサ１０のその 他の構造は西独実用新案第８１０１５８４号明細書に記載のセンサの構造にほぼ 相当する：金属ケーシング１４に失われないように固定したシールリング１Ｔの みが付加的に示される。The layered electrodes on the outer and inner surfaces of this solid electrolyte tube 11 are exposed to the display and measurement gas. We have omitted the protective layer for the electrodes that are applied to the solid state electrode; coated on the solute tube 11 and connected to electrical connections in a known manner, at least one of which Leads to the connecting cable 13: usually has a catalytic effect on the outer surface of the solid electrolyte tube 11. The electrode is connected to an electrically grounded metal casing 14. solid electrolyte A rod-shaped resistance heating element 16 protrudes into the internal space 15 of the tube 11, and this element 15 is almost filled and reaches near the bottom 12 of the solid electrolyte tube 11: However, this For many uses of sensor 10, the arrangement of resistive heating element 16 can be omitted. Ru. The interior space 15 of the solid electrolyte tube 11 is exposed to a reference gas (e.g. air), This gas is in contact with the counter electrode, not shown. That of sensor 10 with The other structure is almost the same as that of the sensor described in West German Utility Model No. 8101584. Equivalent: of the seal ring 1T fixed to the metal casing 14 so as not to be lost. additionally shown.
固体電解質管１１の金属ケーシング１４から測定ガス側に突出する部分はとくに 耐食性鋼板からなるコツプ状保護管１８によって包囲される。この保護管１８は その開放端部に外向きのフランジ１９を有し、このフランジは波形ワッシャ状に 形成され、金属ケーシング１４の端面で折返し縁２０により固定される。保護管 １８は固体電解質管１１を離れて包囲し、測定ガス側に凸のキャップとして形成 した底部２１を有する。Particularly the part of the solid electrolyte tube 11 that protrudes from the metal casing 14 toward the measurement gas side. It is surrounded by a pot-shaped protective tube 18 made of a corrosion-resistant steel plate. This protection tube 18 It has an outwardly facing flange 19 at its open end, which flange is shaped like a corrugated washer. and is fixed by a folded edge 20 at the end face of the metal casing 14. protection tube 18 separates from and surrounds the solid electrolyte tube 11, and is formed as a convex cap on the measurement gas side. It has a bottom part 21 which is made of a metal material.
このキャップ状底部２１のもつとも遠く突出する範囲に乳頭状の凸の隆起２２が 配置され、この隆起はとくに円錐台状に形成され、測定ガス側に細くなる。この 隆起２２は測定ガスの入口として設けた孔２３を含む。A papilla-like convex bulge 22 is formed in the farthest protruding range of this cap-like bottom 21. The elevation is preferably truncated and tapered towards the measuring gas. this The bulge 22 includes a hole 23 provided as an inlet for the measuring gas.
この孔２３は２５朋の直径を有するけれど：適用の場合に応じて１〜４朋とくに ２〜３朋の直径を有する。This hole 23 has a diameter of 25 mm, but in particular between 1 and 4 mm depending on the application. It has a diameter of 2 to 3 mm.
孔２３を包囲する隆起２２はこの場合１朋の高さを有するけれど、適用の場合に 応じて０．３〜２正、とくに０．４〜１．５朋の高さを有する。キャップ状底部 ２１の高さは４朋であるけれど、適用の場合に応じて２，５〜６＋＋ＩＮ、とく に３〜５」である。このような保護管１８の全長は２０朋であるけれど、適用の 場合に応じて１２〜６０７Ｉ１１！、とくに１８〜２５ｍｍである。The ridge 22 surrounding the hole 23 has a height of 1 mm in this case, but in case of application Accordingly, it has a height of 0.3 to 2 mm, in particular 0.4 to 1.5 mm. cap-shaped bottom The height of 21 is 4 mm, but depending on the application it can be 2,5 to 6++ IN, especially 3 to 5". The total length of such a protection tube 18 is 20 mm, but depending on the application. 12-607I11 depending on the situation! , especially 18 to 25 mm.
保護管１８の内部空間からの測定ガスの出口として保護管１８の側壁２４に６つ の孔２５が配置され、この孔は金属ケーシング１４の測定ガス側端部の近くに存 在し、この場合金属ケーシング１４のこの端部から５朋より小さいとくに１．５ 〜６順の距離を有する。この例ではこの距離は２朋である。保護管１８の側壁２ ４内のこの孔２５の自由断面はとくにその高さが０．５ｍｍ、その幅が２ｕであ るように選択される；使用の場合に応じてこの孔はその自由断面を高さ０．６〜 １ｍｍ ｘ幅１〜６ｎの間で変化することができる。この孔２５の数は使用の場 合に応じて６〜９、しかしとくに４〜６である。有利にこの孔２５は保護管１８ の側壁２４に保護管１８の縦軸に対し直角方向のただ１つの平面内に配置される 。Six outlets are provided on the side wall 24 of the protection tube 18 as outlets for the measurement gas from the internal space of the protection tube 18. A hole 25 is located near the end of the metal casing 14 on the measuring gas side. in this case from this end of the metal casing 14 less than 5 mm, in particular 1.5 mm. ~6 order distances. In this example, this distance is 2. Side wall 2 of protection tube 18 The free section of this hole 25 in 4 has a height of 0.5 mm and a width of 2 u. Depending on the case of use, this hole has a free section with a height of 0.6 to It can vary between 1mm x width 1-6n. The number of holes 25 is depending on the case, from 6 to 9, but especially from 4 to 6. Advantageously, this hole 25 is connected to the protective tube 18. located in a single plane perpendicular to the longitudinal axis of the protective tube 18 on the side wall 24 of the protective tube 18. .
中心にガス入口としての孔２３を含む隆起２２とともにこの保護管１８の有利な 作用には迂回装置２６の配置および形成が重要であり、この迂回装置は孔２５か ら出る測定ガスを保護管１８の縦軸に対し鋭角的に循環するように案内する。こ の迂回装置２６はとくに保護管１８の側壁２４へ切込んで曲げである。この舌状 迂回装置２６はその自由端が保護管１８の内部空間へ突入し、その際はぼセンサ １０の測定ガスと反対側の端部を向く。保護管１８の底部２１にある隆起２２は 測定ガス中にある固体粒子が保護管１８の内部空間へまったく入らないために役 立つけれど、ガス流出に役立つ孔２５のこの迂回装置２６は隆起２２の利点を支 持するとともにとくに誤制御の回避および電子評価回路の簡単化に関する前記利 点に作用する；孔２３および２５の小さい断面ならびにそれによって達成される 保護管１８を貫流する小さい測定ガス量は固体電解質管１１の内部空間２５に抵 抗加熱要素１６を含むセンサ１０の場合さらに加熱能力の減少に役立つ。The advantageous feature of this protective tube 18 is that it has a ridge 22 containing a hole 23 as a gas inlet in the center. The arrangement and formation of the bypass device 26 is important for the operation, and this bypass device is The measuring gas exiting from the protective tube 18 is guided in circulation at an acute angle to the longitudinal axis of the protective tube 18. child The bypass device 26 is preferably cut into the side wall 24 of the protective tube 18 and bent. This tongue-like The bypass device 26 has its free end protruding into the internal space of the protective tube 18, and the sensor 10, facing the end opposite to the measuring gas. The ridge 22 on the bottom 21 of the protection tube 18 is This serves to prevent any solid particles present in the measurement gas from entering the internal space of the protection tube 18. However, this bypass device 26 of the hole 25, which serves for gas escape, supports the advantages of the ridge 22. In particular, the above-mentioned advantages regarding the avoidance of erroneous control and the simplification of electronic evaluation circuits can be realized. Acting on points; small cross-section of holes 23 and 25 and thereby achieved The small amount of measured gas flowing through the protection tube 18 resists the internal space 25 of the solid electrolyte tube 11. In the case of a sensor 10 that includes an anti-heating element 16, this also serves to reduce the heating capacity.
本発明のセンサ１１０の測定要素と、しては底部１２等を有する前記固体電解質 管１１のみならず、他の形態（たとえば米国特許第４０１１６５５号、第４２８ ３２６１号明細書に記載の小板状）または他の機能（たとえば米国特許第４００ ７．４５５号、第４０１１６５５号明細書に記載の抵抗または導電性変化）の測 定要素を使用することもできる。；シかしこれらすべての測定要素は固体である 。The measuring element of the sensor 110 of the invention and the solid electrolyte having the bottom 12 etc. Not only the tube 11 but also other shapes (for example, U.S. Pat. Nos. 4,011,655 and 428 3261) or other features (e.g., U.S. Pat. No. 400 7.455, measurement of resistance or conductivity change described in specification No. 4011655) Fixed elements can also be used. ;However, all these measurement elements are solids. .
悶藻調査報告 ＡＮＮＥＸ Ｔｏ ムどＥ ＩＮＴＥλＮＡＴ：ＣＮＡＬ Ｓ二、−只Ｃ’Ａ ＲＥフＯＲて ＱＮTorso investigation report ANNEX To Mudo E INTEλNAT:CNAL S2, -Just C’A REFORte QN
Claims (14)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8420216.5 | 1984-07-06 | ||
| DE19848420216 DE8420216U1 (en) | 1984-07-06 | 1984-07-06 | MEASURING PROBE FOR DETERMINING THE OXYGEN CONTENT IN GASES |
| DE3511730.3 | 1985-03-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61502702A true JPS61502702A (en) | 1986-11-20 |
| JPH0515221B2 JPH0515221B2 (en) | 1993-03-01 |
Family
ID=6768582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60503094A Granted JPS61502702A (en) | 1984-07-06 | 1985-07-04 | Sensor that measures oxygen content in gas |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS61502702A (en) |
| DE (1) | DE8420216U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7686932B2 (en) | 2004-09-28 | 2010-03-30 | Ngk Spark Plug Co., Ltd. | Gas sensor |
-
1984
- 1984-07-06 DE DE19848420216 patent/DE8420216U1/en not_active Expired
-
1985
- 1985-07-04 JP JP60503094A patent/JPS61502702A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7686932B2 (en) | 2004-09-28 | 2010-03-30 | Ngk Spark Plug Co., Ltd. | Gas sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8420216U1 (en) | 1984-09-27 |
| JPH0515221B2 (en) | 1993-03-01 |
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