JPS61112263U - - Google Patents
Info
- Publication number
- JPS61112263U JPS61112263U JP19987584U JP19987584U JPS61112263U JP S61112263 U JPS61112263 U JP S61112263U JP 19987584 U JP19987584 U JP 19987584U JP 19987584 U JP19987584 U JP 19987584U JP S61112263 U JPS61112263 U JP S61112263U
- Authority
- JP
- Japan
- Prior art keywords
- gas detection
- detection piece
- gas
- heater
- outputs
- 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
- 238000001514 detection method Methods 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims 2
- 150000004706 metal oxides Chemical class 0.000 claims 2
- 239000004065 semiconductor Substances 0.000 claims 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Description
第１図は実施例のガス検出装置の回路図、第２
図は実施例の特性図、第３図は従来例の回路図で
有る。第４図は他の実施例のブロツク図で有る。
ｎ……ｎ形ガス検出片、ｐ……ｐ形ガス検出片
、Ａ１，Ａ２，Ａ３，Ａ４，Ａ５……演算増幅器
、Ｔｒ１，Ｔｒ２，ＴＷ３……トランジスタ、２
，４，６，８，１０，１２，２２，２４，２８，
３２……アナログスイツチ、Ｍ……乗算ＩＣ、Ｉ
１，Ｉ５……発振回路、Ｉ２……電圧―パルス幅
変調回路、Ｉ３……分周回路、Ｉ４……空燃比コ
ントローラ、Ｉ６……ＡＤコンバータ、Ｉ７……
デジタル乗算ＩＣ、Ｉ９……デジタル除算ＩＣ。
Figure 1 is a circuit diagram of the gas detection device of the embodiment, Figure 2
The figure is a characteristic diagram of the embodiment, and FIG. 3 is a circuit diagram of a conventional example. FIG. 4 is a block diagram of another embodiment. n...n-type gas detection piece, p...p-type gas detection piece, A1, A2, A3, A4, A5... operational amplifier, Tr1, Tr2, TW3... transistor, 2
,4,6,8,10,12,22,24,28,
32... Analog switch, M... Multiplication IC, I
1, I5...Oscillation circuit, I2...Voltage-pulse width modulation circuit, I3...Divider circuit, I4...Air-fuel ratio controller, I6...AD converter, I7...
Digital multiplication IC, I9...Digital division IC.
Claims (1)
と、ｐ形金属酸化物半導体を用いたｐ形ガス検出
片と、これらのガス検出片を加熱するためのヒー
タとを有する、排ガス組成の検出用ガスセンサと
、 各ガス検出片に接続した定電流電源と、 各ガス検出片への印加電圧から、各ガス検出片
の抵抗値に対応した２つの出力を得るための抵抗
値検出手段と、 抵抗値検出手段の２つの出力の積の信号を得る
ための乗算手段と、 乗算手段の出力によりガスセンサのヒータへの
印加電力をコントロールするためのヒータコント
ローラと、 抵抗値検出手段の２つの出力の比の信号を得る
ための除算手段と、 除算手段の出力により動作する空燃比コントロ
ーラ、とを有するガス検出装置。[Claims for Utility Model Registration] An n-type gas detection piece using an n-type metal oxide semiconductor, a p-type gas detection piece using a p-type metal oxide semiconductor, and a device for heating these gas detection pieces. A gas sensor for detecting exhaust gas composition having a heater, a constant current power supply connected to each gas detection piece, and a voltage applied to each gas detection piece to obtain two outputs corresponding to the resistance value of each gas detection piece. a multiplier for obtaining a signal of the product of two outputs of the resistance value detecting means; a heater controller for controlling the power applied to the heater of the gas sensor based on the output of the multiplier; and a resistor. A gas detection device comprising: a dividing means for obtaining a signal of a ratio of two outputs of the value detecting means; and an air-fuel ratio controller operated by the output of the dividing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19987584U JPS61112263U (en) | 1984-12-27 | 1984-12-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19987584U JPS61112263U (en) | 1984-12-27 | 1984-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61112263U true JPS61112263U (en) | 1986-07-16 |
Family
ID=30760208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19987584U Pending JPS61112263U (en) | 1984-12-27 | 1984-12-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61112263U (en) |
-
1984
- 1984-12-27 JP JP19987584U patent/JPS61112263U/ja active Pending