JPS61112261U - - Google Patents

Info

Publication number
JPS61112261U
JPS61112261U JP19987384U JP19987384U JPS61112261U JP S61112261 U JPS61112261 U JP S61112261U JP 19987384 U JP19987384 U JP 19987384U JP 19987384 U JP19987384 U JP 19987384U JP S61112261 U JPS61112261 U JP S61112261U
Authority
JP
Japan
Prior art keywords
detection
gas
detection means
type
heater
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
Application number
JP19987384U
Other languages
Japanese (ja)
Other versions
JPH041492Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1984199873U priority Critical patent/JPH041492Y2/ja
Publication of JPS61112261U publication Critical patent/JPS61112261U/ja
Application granted granted Critical
Publication of JPH041492Y2 publication Critical patent/JPH041492Y2/ja
Expired legal-status Critical Current

Links

Description

【図面の簡単な説明】[Brief explanation of the drawing]

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。 ｎ……ｎ形ガス検出片、ｐ……ｐ形ガス検出片
、Ｈ……ヒータ、Ａ１，Ａ２……増幅器、Ｍ……
乗算ＩＣ、Ａ３……演算増幅器、２，４，６，８
，１０，１２……アナログスイツチ、Ｉ１……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。 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. n...n-type gas detection piece, p...p-type gas detection piece, H...heater, A1, A2...amplifier, M...
Multiplication IC, A3... operational amplifier, 2, 4, 6, 8
, 10, 12...Analog switch, I1...Oscillation circuit, I2...Voltage pulse width modulation circuit, I3...
...Frequency dividing circuit, I4...Air-fuel ratio controller.

Claims (1)

【実用新案登録請求の範囲】 ｎ形金属酸化物半導体を用いたｎ形ガス検出片
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
ターとを有する、排ガス組成の検出用ガスセンサ
と、 ｎ形ガス検出片の電気伝導度を検出するための
σｎ検出手段と、 ｐ形ガス検出片の電気伝導度を検出するための
σｐ検出手段と、 σｎ検出手段とσｐ検出手段の出力の積の信号
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、 σｎ検出手段およびσｐ検出手段の出力の少く
とも一方と他方と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, the gas sensor having a heater, σn detection means for detecting the electrical conductivity of the n-type gas detection piece, and σp detection means for detecting the electrical conductivity of the p-type gas detection piece. , a multiplication means for obtaining a signal of the product of the outputs of the σn detection means and the σp detection means; a heater controller for controlling the power applied to the heater of the gas sensor by the output of the multiplication means; σn detection means and σp detection means A gas detection device comprising: a dividing means for obtaining a signal of a ratio of at least one of the outputs to the other; and an air-fuel ratio controller operated by the output of the dividing means.
JP1984199873U 1984-12-27 1984-12-27 Expired JPH041492Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1984199873U JPH041492Y2 (en) 1984-12-27 1984-12-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1984199873U JPH041492Y2 (en) 1984-12-27 1984-12-27

Publications (2)

Publication Number Publication Date
JPS61112261U true JPS61112261U (en) 1986-07-16
JPH041492Y2 JPH041492Y2 (en) 1992-01-20

Family

ID=30760204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1984199873U Expired JPH041492Y2 (en) 1984-12-27 1984-12-27

Country Status (1)

Country Link
JP (1) JPH041492Y2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5237494A (en) * 1975-09-20 1977-03-23 Matsushita Electric Works Ltd Gas, smoke detection device
JPS567056U (en) * 1979-06-28 1981-01-22
JPS5737824A (en) * 1980-08-20 1982-03-02 Seiko Epson Corp Method and device for impurity diffusion
JPS5796248A (en) * 1980-12-05 1982-06-15 Matsushita Electric Ind Co Ltd Detecting method for gas using superparticulate gas sensor
JPS5842960A (en) * 1981-09-08 1983-03-12 Matsushita Electric Works Ltd Detection apparatus of combustible gas

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS567056B2 (en) * 1973-10-03 1981-02-16

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5237494A (en) * 1975-09-20 1977-03-23 Matsushita Electric Works Ltd Gas, smoke detection device
JPS567056U (en) * 1979-06-28 1981-01-22
JPS5737824A (en) * 1980-08-20 1982-03-02 Seiko Epson Corp Method and device for impurity diffusion
JPS5796248A (en) * 1980-12-05 1982-06-15 Matsushita Electric Ind Co Ltd Detecting method for gas using superparticulate gas sensor
JPS5842960A (en) * 1981-09-08 1983-03-12 Matsushita Electric Works Ltd Detection apparatus of combustible gas

Also Published As

Publication number Publication date
JPH041492Y2 (en) 1992-01-20

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