JPS6174646U - - Google Patents
Info
- Publication number
- JPS6174646U JPS6174646U JP16077684U JP16077684U JPS6174646U JP S6174646 U JPS6174646 U JP S6174646U JP 16077684 U JP16077684 U JP 16077684U JP 16077684 U JP16077684 U JP 16077684U JP S6174646 U JPS6174646 U JP S6174646U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- target value
- ratio sensor
- output
- 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 22
- 239000007789 gas Substances 0.000 claims 3
- 229930195733 hydrocarbon Natural products 0.000 claims 2
- 150000002430 hydrocarbons Chemical class 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 2
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案の構成を示すブロツク図である
。第２図〜第１０図は本考案の実施例を例示し、
第２図はエンジンの空燃比制御システムの概略構
成図、第３図は空燃比センサの起電力特性を示す
特性図、第４図は補正回路の具体的回路図、第５
図ａ〜ｆは補正回路の各部分での温度に対する出
力特性図、第６図は空燃比コントローラの作動を
示すフローチヤート図、第７図は目標空燃比に対
するスライスレベル中央値のマツプを示す図、第
８図は空燃比センサの出力特性と平均燃料噴射量
との対応関係を示す説明図、第９図および第１０
図はそれぞれ燃料噴射開始時および終了時のイン
タラプト処理を示す図である。
１…エンジン、３…排気通路、５…燃料噴射弁
、８…空燃比センサ、９，１０…温度素子、１１
…空燃比コントローラ、１５…補正回路、１８…
補正手段、１９…目標値設定手段、２０…比較手
段、２１…空燃比制御手段。
FIG. 1 is a block diagram showing the configuration of the present invention. 2 to 10 illustrate embodiments of the present invention,
Figure 2 is a schematic configuration diagram of the engine air-fuel ratio control system, Figure 3 is a characteristic diagram showing the electromotive force characteristics of the air-fuel ratio sensor, Figure 4 is a specific circuit diagram of the correction circuit, and Figure 5 is a diagram showing the electromotive force characteristics of the air-fuel ratio sensor.
Figures a to f are temperature-dependent output characteristics of each part of the correction circuit, Figure 6 is a flowchart showing the operation of the air-fuel ratio controller, and Figure 7 is a map of the median slice level with respect to the target air-fuel ratio. , FIG. 8 is an explanatory diagram showing the correspondence between the output characteristics of the air-fuel ratio sensor and the average fuel injection amount, and FIGS. 9 and 10.
The figures are diagrams showing interrupt processing at the start and end of fuel injection, respectively. DESCRIPTION OF SYMBOLS 1... Engine, 3... Exhaust passage, 5... Fuel injection valve, 8... Air-fuel ratio sensor, 9, 10... Temperature element, 11
...Air-fuel ratio controller, 15...Correction circuit, 18...
Correction means, 19... Target value setting means, 20... Comparison means, 21... Air-fuel ratio control means.
Claims (1)
の酸素濃度に応じてその出力がリニアに変化する
空燃比センサと、予め設定された混合気の空燃比
に対応した上記空燃比センサの目標値を設定する
目標値設定手段と、上記空燃比センサの出力と目
標値設定手段により設定された目標値とを比較す
る比較手段と、該比較手段の出力を受け、エンジ
ンに供給する混合気の空燃比を上記目標値に制御
する空燃比制御手段と、上記空燃比センサの温度
もしくは排気ガス中の炭化水素濃度の少なくとも
一方を検出する検出手段と、該検出手段の出力を
受け、空燃比センサの温度もしくは排気ガス中の
炭化水素濃度に応じて上記空燃比センサの出力を
補正する補正手段とを設けたことを特徴とするエ
ンジンの空燃比制御装置。 The air-fuel ratio sensor is installed in the exhaust passage of the engine and its output changes linearly according to the oxygen concentration in the exhaust gas, and the target value of the air-fuel ratio sensor corresponds to a preset air-fuel ratio of the mixture. a target value setting means to set; a comparison means for comparing the output of the air-fuel ratio sensor with the target value set by the target value setting means; and an air-fuel ratio of the air-fuel mixture to be supplied to the engine upon receiving the output of the comparison means. an air-fuel ratio control means for controlling the temperature to the target value; a detection means for detecting at least one of the temperature of the air-fuel ratio sensor or the hydrocarbon concentration in the exhaust gas; Alternatively, an air-fuel ratio control device for an engine, comprising a correction means for correcting the output of the air-fuel ratio sensor according to the concentration of hydrocarbons in exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16077684U JPS6174646U (en) | 1984-10-24 | 1984-10-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16077684U JPS6174646U (en) | 1984-10-24 | 1984-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6174646U true JPS6174646U (en) | 1986-05-20 |
Family
ID=30718691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16077684U Pending JPS6174646U (en) | 1984-10-24 | 1984-10-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6174646U (en) |
-
1984
- 1984-10-24 JP JP16077684U patent/JPS6174646U/ja active Pending