JPS6339666U - - Google Patents
Info
- Publication number
- JPS6339666U JPS6339666U JP13380586U JP13380586U JPS6339666U JP S6339666 U JPS6339666 U JP S6339666U JP 13380586 U JP13380586 U JP 13380586U JP 13380586 U JP13380586 U JP 13380586U JP S6339666 U JPS6339666 U JP S6339666U
- Authority
- JP
- Japan
- Prior art keywords
- oxygen sensor
- voltage
- reference voltage
- oxygen
- 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.)
- Pending
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 4
- 230000006866 deterioration Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Description
第１図はこの考案の一実施例を示す回路図、第
２図は従来例の酸素濃度検出装置の回路図、第３
図イ，ロはチタニア厚膜型酸素センサの検出原理
の説明図、第４図は同じくその劣化原理の説明図
である。
１……酸素センサ、２……スイツチ、３……電
源、４，５……白金電極、６……セラミツク基板
、７……チタニア層、８……センサ制御部、９…
…トランジスタ、Ｒ１……ヒータ、Ｒ２……分圧
抵抗、ＲＴ……チタニア厚膜部、Ｒｃ……比較抵
抗。
Fig. 1 is a circuit diagram showing an embodiment of this invention, Fig. 2 is a circuit diagram of a conventional oxygen concentration detection device, and Fig. 3 is a circuit diagram showing an embodiment of this invention.
Figures A and B are explanatory diagrams of the detection principle of a titania thick film oxygen sensor, and Figure 4 is an explanatory diagram of its deterioration principle. DESCRIPTION OF SYMBOLS 1...Oxygen sensor, 2...Switch, 3...Power source, 4, 5...Platinum electrode, 6...Ceramic substrate, 7...Titania layer, 8...Sensor control unit, 9...
...transistor, R1 ...heater, R2 ...divider resistance, RT...titania thick film portion, Rc...comparison resistor.
Claims (1)
、該酸素センサの出力電圧によつてその雰囲気の
酸素濃度を検出する酸素濃度検出装置において、 前記酸素センサに基準電圧が印加されなくなつ
た後、該酸素センサに一定時間前記基準電圧とは
逆向きに電圧を印加して、該酸素センサの劣化の
進行を防止する劣化防止回路を設けたことを特徴
とする酸素濃度検出装置。[Claims for Utility Model Registration] In an oxygen concentration detection device that applies a reference voltage to a resistance change type oxygen sensor and detects the oxygen concentration of the atmosphere based on the output voltage of the oxygen sensor, the oxygen sensor is provided with a reference voltage. A deterioration prevention circuit is provided that applies a voltage in the opposite direction to the reference voltage to the oxygen sensor for a certain period of time after the voltage is no longer applied to prevent the progress of deterioration of the oxygen sensor. Oxygen concentration detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13380586U JPS6339666U (en) | 1986-09-02 | 1986-09-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13380586U JPS6339666U (en) | 1986-09-02 | 1986-09-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6339666U true JPS6339666U (en) | 1988-03-15 |
Family
ID=31034454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13380586U Pending JPS6339666U (en) | 1986-09-02 | 1986-09-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6339666U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006200930A (en) * | 2005-01-18 | 2006-08-03 | Toyota Motor Corp | Control unit of exhaust gas sensor |
-
1986
- 1986-09-02 JP JP13380586U patent/JPS6339666U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006200930A (en) * | 2005-01-18 | 2006-08-03 | Toyota Motor Corp | Control unit of exhaust gas sensor |