JPS6439449U - - Google Patents
Info
- Publication number
- JPS6439449U JPS6439449U JP13330987U JP13330987U JPS6439449U JP S6439449 U JPS6439449 U JP S6439449U JP 13330987 U JP13330987 U JP 13330987U JP 13330987 U JP13330987 U JP 13330987U JP S6439449 U JPS6439449 U JP S6439449U
- Authority
- JP
- Japan
- Prior art keywords
- fuel ratio
- air
- cylinder pressure
- assumption
- lean
- 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 13
- 238000001514 detection method Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
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、第２
図は本考案の一実施例の構成図、第３図は、空燃
比のリツチ側へのずれＡ図に対する筒内圧特性の
変化及びリーン側へのずれＢ図に対する筒内圧特
性の変化を示す線図、第４図は、同上実施例の制
御ルーチンを示すフローチヤート、第５図はＡ〜
Ｃは、吸入空気流量の各種検出手段の概要を示す
図である。
２……筒内圧センサ、４……Ｐｍａｘ・θｐｍ
ａｘ検出回路、５……クランク角センサ、６……
マイクロコンピユータ。
Figure 1 is a block diagram showing the configuration of the present invention, Figure 2 is a block diagram showing the configuration of the present invention.
The figure is a configuration diagram of an embodiment of the present invention. Figure 3 is a line showing the change in cylinder pressure characteristics with respect to a deviation of the air-fuel ratio toward the rich side (A) and the change in the cylinder pressure characteristic with respect to a deviation toward the lean side (B). 4 is a flowchart showing the control routine of the above embodiment, and FIG.
C is a diagram showing an outline of various detection means for intake air flow rate. 2...Cylinder pressure sensor, 4...Pmax・θpm
ax detection circuit, 5... crank angle sensor, 6...
microcomputer.
Claims (1)
ピーク値を与えるクランク角度とを検出する筒内
圧ピーク値・クランク角度検出手段と、 前記検出された筒内圧ピーク値とクランク角度
とに基づいて現在の空燃比の目標空燃比からのず
れ量を推定する空燃比ずれ量推定手段と、 前記推定された空燃比のずれ量が目標空燃比に
対してリツチ側であるかリーン側であるかを仮定
するリツチ・リーン仮定手段と、 前記推定された空燃比のずれ量とそのリツチ側
又はリーン側の仮定により空燃比を目標空燃比に
近づけるべく燃料供給量を設定する燃料供給量設
定手段と、 前記推定された空燃比のずれ量の変化状態に応
じてリツチ・リーンの仮定が正しいか否かを判定
する仮定正誤判定手段と、 前記判定手段による判定結果に応じてリツチ・
リーン仮定手段による仮定を修正する仮定修正手
段とを備えて構成したことを特徴とする内燃機関
の空燃比制御装置。[Scope of Claim for Utility Model Registration] A cylinder pressure detection means for detecting the cylinder pressure of an engine, a cylinder pressure peak value and a cylinder pressure detection means for detecting the peak value of the detected cylinder pressure for each combustion stroke and a crank angle that provides the peak value. crank angle detection means; air-fuel ratio deviation estimation means for estimating the deviation amount of the current air-fuel ratio from the target air-fuel ratio based on the detected in-cylinder pressure peak value and the crank angle; and the estimated air-fuel ratio. rich/lean assumption means for assuming whether the deviation amount of the air-fuel ratio is rich or lean with respect to the target air-fuel ratio; a fuel supply amount setting means for setting a fuel supply amount to bring the fuel ratio closer to a target air-fuel ratio; and an assumption for determining whether the rich-lean assumption is correct according to a state of change in the estimated air-fuel ratio deviation amount. correct/incorrect judgment means;
1. An air-fuel ratio control device for an internal combustion engine, comprising assumption correction means for correcting assumptions made by the lean assumption means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13330987U JPS6439449U (en) | 1987-09-02 | 1987-09-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13330987U JPS6439449U (en) | 1987-09-02 | 1987-09-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6439449U true JPS6439449U (en) | 1989-03-09 |
Family
ID=31391052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13330987U Pending JPS6439449U (en) | 1987-09-02 | 1987-09-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6439449U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0638625U (en) * | 1992-10-29 | 1994-05-24 | 株式会社コレホー | Stoppers such as rubber strings |
-
1987
- 1987-09-02 JP JP13330987U patent/JPS6439449U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0638625U (en) * | 1992-10-29 | 1994-05-24 | 株式会社コレホー | Stoppers such as rubber strings |
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