JPH0292050U - - Google Patents
Info
- Publication number
- JPH0292050U JPH0292050U JP135689U JP135689U JPH0292050U JP H0292050 U JPH0292050 U JP H0292050U JP 135689 U JP135689 U JP 135689U JP 135689 U JP135689 U JP 135689U JP H0292050 U JPH0292050 U JP H0292050U
- Authority
- JP
- Japan
- Prior art keywords
- fuel ratio
- air
- value
- integral
- difference
- 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
Links
- 239000000446 fuel Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案の構成図、第２図、第３図は本
考案の実施例を示す構成断面図と制御系のブロツ
ク構成図、第４図は制御内容を示すフローチヤー
ト、第５図、第６図は積分定数の設定例を示す特
性図とメンバシツプ関数の特性図、第７図は動作
状態を示す説明図、第８図、第９図は本考案の他
の実施例を示す積分定数の特性図とメンバシツプ
関数の特性図、第１０図、第１１図は従来例のフ
ローチヤートと特性図である。
２４……エアフローメータ、２５……クランク
角センサ、２６……空燃比センサ、２７……水温
センサ、３５……燃料噴射弁、４０……コントロ
ールユニツト。
Fig. 1 is a configuration diagram of the present invention, Figs. 2 and 3 are a cross-sectional view of the configuration and a block diagram of the control system showing an embodiment of the invention, Fig. 4 is a flowchart showing the control contents, and Fig. 5 , Fig. 6 is a characteristic diagram showing an example of setting the integral constant and a characteristic diagram of the membership function, Fig. 7 is an explanatory diagram showing the operating state, and Figs. 8 and 9 are integral diagrams showing other embodiments of the present invention. A characteristic diagram of constants and a characteristic diagram of membership functions. FIGS. 10 and 11 are a flow chart and a characteristic diagram of a conventional example. 24... Air flow meter, 25... Crank angle sensor, 26... Air-fuel ratio sensor, 27... Water temperature sensor, 35... Fuel injection valve, 40... Control unit.
Claims (1)
る空燃比センサと、空燃比センサの検出値に応じ
て少なくとも積分処理によりフイードバツク制御
量を算出する補正演算手段と、フイードバツク制
御量に応じて空燃比を目標空燃比に制御する空燃
比制御手段とフイードバツク制御量と所定の基準
値との差分を算出する差分算出手段と、この差分
の大中小を判定する判定手段と、この判定が小な
るときは小、中なるときは大、大なるときは小の
値を前記積分処理の積分定数として設定する積分
定数設定手段とを備えたことを特徴とするエンジ
ンの空燃比制御装置。 An air-fuel ratio sensor that detects an air-fuel ratio based on engine exhaust gas components, a correction calculation means that calculates a feedback control amount by at least integral processing according to the detected value of the air-fuel ratio sensor, and a target air-fuel ratio according to the feedback control amount. an air-fuel ratio control means for controlling the air-fuel ratio; a difference calculating means for calculating the difference between the feedback control amount and a predetermined reference value; a determining means for determining whether this difference is large, medium or small; 1. An air-fuel ratio control device for an engine, comprising: an integral constant setting means for setting a large value when the value is in the middle, and a small value when the value is large as an integral constant for the integral process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP135689U JPH0631155Y2 (en) | 1989-01-10 | 1989-01-10 | Air-fuel ratio controller for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP135689U JPH0631155Y2 (en) | 1989-01-10 | 1989-01-10 | Air-fuel ratio controller for engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0292050U true JPH0292050U (en) | 1990-07-20 |
| JPH0631155Y2 JPH0631155Y2 (en) | 1994-08-22 |
Family
ID=31201172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP135689U Expired - Fee Related JPH0631155Y2 (en) | 1989-01-10 | 1989-01-10 | Air-fuel ratio controller for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0631155Y2 (en) |
-
1989
- 1989-01-10 JP JP135689U patent/JPH0631155Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0631155Y2 (en) | 1994-08-22 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |