JPS62190840U - - Google Patents
Info
- Publication number
- JPS62190840U JPS62190840U JP7856686U JP7856686U JPS62190840U JP S62190840 U JPS62190840 U JP S62190840U JP 7856686 U JP7856686 U JP 7856686U JP 7856686 U JP7856686 U JP 7856686U JP S62190840 U JPS62190840 U JP S62190840U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- sensor
- pump current
- operating state
- 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
- 239000000446 fuel Substances 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims 3
- 230000004913 activation Effects 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案の基本概念図、第２〜９図は本
考案の一実施例を示す図であり、第２図はその全
体構成図、第３図はその酸素センサの分解斜視図
、第４図はその酸素センサの断面図、第５図はそ
の空燃比検出回路の回路図、第６図はその電流供
給回路の詳細な回路図、第７図はその空燃比と検
出電圧Ｖｏｕｔとの関係を示す図、第８図はその
センサ電圧の出力特性図、第９図はその空燃比制
御のプログラムを示すフローチヤートである。
１……エンジン、１０……酸素センサ、１１…
…空燃比検出回路（空燃比検出手段）、１５……
運転状態検出手段、１６……コントロールユニツ
ト（空燃比演算手段、判別手段）、３２……セン
サ部（センサセル）、３５……ポンプ部（ポンプ
セル）。
Fig. 1 is a basic conceptual diagram of the present invention, Figs. 2 to 9 are diagrams showing an embodiment of the present invention, Fig. 2 is an overall configuration diagram thereof, Fig. 3 is an exploded perspective view of the oxygen sensor, Fig. 4 is a cross-sectional view of the oxygen sensor, Fig. 5 is a circuit diagram of its air-fuel ratio detection circuit, Fig. 6 is a detailed circuit diagram of its current supply circuit, and Fig. 7 shows its air-fuel ratio and detection voltage Vout. FIG. 8 is a diagram showing the output characteristic of the sensor voltage, and FIG. 9 is a flowchart showing the air-fuel ratio control program. 1...Engine, 10...Oxygen sensor, 11...
...Air-fuel ratio detection circuit (air-fuel ratio detection means), 15...
Operating state detection means, 16...control unit (air-fuel ratio calculation means, discrimination means), 32...sensor section (sensor cell), 35...pump section (pump cell).
Claims (1)
関するポンプ電流が供給されるポンプセルと、所
定の基準ガスとの比較のもとにこの相関状態を監
視する電圧を出力するとともに、ポンプ電流の供
給が停止されているとき活性の程度に応じた電圧
を出力するセンサセルと、を有する酸素センサと
、 (b) 酸素センサが所定の活性状態に移行すると
、酸素センサへのポンプ電流の供給を開始し、こ
のポンプ電流の値から空燃比を算出する空燃比検
出手段と、 (c) エンジンの運転状態を検出する運転状態検
出手段と、 (d) エンジンの運転状態から吸入空気量、燃料
供給量等をパラメータとして吸入混合気の空燃比
を演算空燃比として演算する空燃比演算手段と、 (e) 演算空燃比が理論空燃比よりリツチ側であ
るとき、酸素センサのセンサセル電圧を所定値と
比較して該酸素センサが所定の活性状態に移行し
たか否かを判別する判別手段と、 を備えたことを特徴とする内燃機関の空燃比検出
装置。[Claims for Utility Model Registration] (a) A pump cell supplied with a pump current that correlates to the concentration of oxygen or reducing gas in the exhaust gas, and monitoring this correlation state based on comparison with a predetermined reference gas. (b) an oxygen sensor having a sensor cell that outputs a voltage and outputs a voltage corresponding to the degree of activation when the supply of pump current is stopped; an air-fuel ratio detection means that starts supplying pump current to the sensor and calculates an air-fuel ratio from the value of the pump current; (c) an operating state detection means that detects the operating state of the engine; and (d) an operating state of the engine. an air-fuel ratio calculating means for calculating the air-fuel ratio of the intake air-fuel mixture as a calculated air-fuel ratio based on the intake air amount, fuel supply amount, etc. as parameters; (e) when the calculated air-fuel ratio is richer than the stoichiometric air-fuel ratio; An air-fuel ratio detection device for an internal combustion engine, comprising: determining means for comparing a sensor cell voltage of a sensor with a predetermined value to determine whether or not the oxygen sensor has entered a predetermined active state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7856686U JPS62190840U (en) | 1986-05-23 | 1986-05-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7856686U JPS62190840U (en) | 1986-05-23 | 1986-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62190840U true JPS62190840U (en) | 1987-12-04 |
Family
ID=30927629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7856686U Pending JPS62190840U (en) | 1986-05-23 | 1986-05-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62190840U (en) |
-
1986
- 1986-05-23 JP JP7856686U patent/JPS62190840U/ja active Pending
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