JPH0269037U - - Google Patents
Info
- Publication number
- JPH0269037U JPH0269037U JP14754488U JP14754488U JPH0269037U JP H0269037 U JPH0269037 U JP H0269037U JP 14754488 U JP14754488 U JP 14754488U JP 14754488 U JP14754488 U JP 14754488U JP H0269037 U JPH0269037 U JP H0269037U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- rich
- lean
- correction coefficient
- 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 20
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 3
- 230000003247 decreasing effect Effects 0.000 claims 2
- 239000007789 gas Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案の構成を示す機能ブロツク図、
第２図は本考案にかかる一実施例を示すシステム
図、第３図は燃料噴射量演算ルーチンのフローチ
ヤート、第４図は比例・積分制御ルーチンのフロ
ーチヤート、第５図はリーン側比例分設定ルーチ
ンのフローチヤート、第６図〜第８図は従来の問
題点を示す図である。
１……機関、７……燃料噴射弁、８……コント
ロールユニツト、９……排気マニホールド、１３
……酸素センサ。
Figure 1 is a functional block diagram showing the configuration of the present invention.
Fig. 2 is a system diagram showing an embodiment of the present invention, Fig. 3 is a flowchart of a fuel injection amount calculation routine, Fig. 4 is a flowchart of a proportional/integral control routine, and Fig. 5 is a flowchart of a proportional/integral control routine on the lean side. Flowcharts of the setting routine, FIGS. 6 to 8, illustrate problems in the prior art. 1... Engine, 7... Fuel injection valve, 8... Control unit, 9... Exhaust manifold, 13
...Oxygen sensor.
Claims (1)
ツチ側で大、リーン側で小の電圧を出力する酸素
センサと、空燃比がリツチからリーンまたはリー
ンからリツチに反転したときに空燃比フイードバ
ツク補正係数をそれぞれ所定の比例分増大または
減少させる空燃比フイードバツク補正係数比例制
御手段と、空燃比のリーン・リツチに応じ空燃比
フイードバツク補正係数を所定時間毎にそれぞれ
所定の積分分増大または減少させる空燃比フイー
ドバツク補正係数積分制御手段と、機関への燃料
供給手段による燃料供給量をそのときの空燃比フ
イードバツク補正係数で補正する燃料供給量補正
手段と、を備えて、空燃比を目標空燃比にフイー
ドバツク制御する内燃機関の空燃比フイードバツ
ク制御装置において、前記酸素センサのリツチ側
出力電圧を所定値と比較判定するリツチ側出力電
圧判定手段と、該リツチ側出力電圧判定手段によ
りリツチ側出力電圧が所定値以下であると判定さ
れたときに前記比例分のうちリーンからリツチへ
の反転時の比例分を所定量大きくするリーン側比
例分可変手段と、を設けたことを特徴とする内燃
機関の空燃比フイードバツク制御装置。 An oxygen sensor responds to the oxygen concentration in the engine's exhaust gas and outputs a voltage that is large on the rich side of the air-fuel ratio and small on the lean side, and the air-fuel ratio feedback when the air-fuel ratio changes from rich to lean or from lean to rich. air-fuel ratio feedback correction coefficient proportional control means for respectively increasing or decreasing the correction coefficient by a predetermined proportional amount; and air-fuel ratio feedback correction coefficient proportional control means for increasing or decreasing the air-fuel ratio feedback correction coefficient by a predetermined integral amount at predetermined time intervals in accordance with lean/rich air-fuel ratios. Feedback of the air-fuel ratio to the target air-fuel ratio is provided, comprising a fuel ratio feedback correction coefficient integral control means and a fuel supply amount correction means for correcting the fuel supply amount by the fuel supply means to the engine by the air-fuel ratio feedback correction coefficient at that time. In an air-fuel ratio feedback control device for an internal combustion engine to be controlled, a rich side output voltage determination means compares and determines a rich side output voltage of the oxygen sensor with a predetermined value, and the rich side output voltage determines the rich side output voltage to a predetermined value. an air-fuel ratio of an internal combustion engine, characterized in that the air-fuel ratio of an internal combustion engine is provided with a lean side proportional amount variable means for increasing a proportional portion of the proportional portion at the time of reversal from lean to rich by a predetermined amount when it is determined that the air-fuel ratio of the internal combustion engine is Feedback control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14754488U JPH0269037U (en) | 1988-11-14 | 1988-11-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14754488U JPH0269037U (en) | 1988-11-14 | 1988-11-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0269037U true JPH0269037U (en) | 1990-05-25 |
Family
ID=31418043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14754488U Pending JPH0269037U (en) | 1988-11-14 | 1988-11-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0269037U (en) |
-
1988
- 1988-11-14 JP JP14754488U patent/JPH0269037U/ja active Pending