JPS6342848U - - Google Patents
Info
- Publication number
- JPS6342848U JPS6342848U JP13829186U JP13829186U JPS6342848U JP S6342848 U JPS6342848 U JP S6342848U JP 13829186 U JP13829186 U JP 13829186U JP 13829186 U JP13829186 U JP 13829186U JP S6342848 U JPS6342848 U JP S6342848U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- output
- fuel
- correcting
- 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 19
- 238000001514 detection method Methods 0.000 claims description 5
- 230000006866 deterioration Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案の基本概念図、第２〜５図は本
考案に係る空燃比制御装置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
素センサが劣化したときの酸素センサ出力と空燃
比制御信号との関係を示す図、第４図はその酸素
センサの異常判別および劣化時における空燃比制
御を行うプログラムを示すフローチヤート、第５
図はその酸素センサの制御周期が異なる運転条件
毎にｎ個に分けられることを示す図、第６図は従
来の空燃比制御装置の作用を説明するためのタイ
ミングチヤートである。
１……エンジン、４……インジエクタ（噴射手
段）、１２……酸素センサ（空燃比検出手段）、
１３……コントロールユニツト（劣化判別手段、
補正手段、制御手段）。
Figure 1 is a basic conceptual diagram of the present invention, Figures 2 to 5 are diagrams showing one embodiment of the air-fuel ratio control device according to the present invention, Figure 2 is its overall configuration diagram, and Figure 3 is its oxygen Figure 4 is a diagram showing the relationship between the oxygen sensor output and the air-fuel ratio control signal when the sensor has deteriorated;
The figure shows that the control period of the oxygen sensor is divided into n periods for different operating conditions, and FIG. 6 is a timing chart for explaining the operation of the conventional air-fuel ratio control device. 1...Engine, 4...Injector (injection means), 12...Oxygen sensor (air-fuel ratio detection means),
13...Control unit (deterioration determination means,
correction means, control means).
Claims (1)
検出手段と、 (b) 空燃比検出手段の特性の劣化を判別する
劣化判別手段と、 (c) 空燃比検出手段の特性の劣化が判別され
ると、空燃比検出手段の出力を補正する補正手段
と、 (d) 空燃比検出手段の出力に基づいて吸入混
合気の空燃比が所定の目標空燃比となるように、
吸入空気あるいは燃料の供給量を制御するととも
に、空燃比検出手段の特性が劣化すると補正手段
の出力に基づいて前記供給量を制御する制御手段
と、 (e) 制御手段の出力に基づいて吸入空気ある
いは燃料の供給量を変えて空燃比を操作する操作
手段と、 を備えたことを特徴とする空燃比制御装置。 (2) 前記補正手段は、空燃比検出手段の特性が
劣化したときその出力の反転周期に制限値を設け
、該制限値を超えるときこの制限値に出力を補正
することを特徴とする実用新案登録請求の範囲第
１項記載の空燃比制御装置。[Claims for Utility Model Registration] (1) (a) Air-fuel ratio detection means for detecting the air-fuel ratio of the intake air-fuel mixture; (b) Deterioration determination means for determining deterioration of the characteristics of the air-fuel ratio detection means; (c ) correcting means for correcting the output of the air-fuel ratio detecting means when it is determined that the characteristics of the air-fuel ratio detecting means have deteriorated; (d) correcting means for correcting the output of the air-fuel ratio detecting means; So that the air fuel ratio is
(e) control means for controlling the supply amount of intake air or fuel and controlling the supply amount based on the output of the correction means when the characteristics of the air-fuel ratio detection means deteriorate; Alternatively, an air-fuel ratio control device comprising: an operating means for controlling the air-fuel ratio by changing the amount of fuel supplied. (2) A utility model characterized in that the correction means sets a limit value on the reversal period of the output when the characteristics of the air-fuel ratio detection means deteriorate, and corrects the output to this limit value when the limit value is exceeded. An air-fuel ratio control device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13829186U JPS6342848U (en) | 1986-09-08 | 1986-09-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13829186U JPS6342848U (en) | 1986-09-08 | 1986-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6342848U true JPS6342848U (en) | 1988-03-22 |
Family
ID=31043135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13829186U Pending JPS6342848U (en) | 1986-09-08 | 1986-09-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6342848U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013163996A (en) * | 2012-02-10 | 2013-08-22 | Denso Corp | Deterioration diagnosis device for catalyst |
-
1986
- 1986-09-08 JP JP13829186U patent/JPS6342848U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013163996A (en) * | 2012-02-10 | 2013-08-22 | Denso Corp | Deterioration diagnosis device for catalyst |
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