JPH0237242U - - Google Patents
Info
- Publication number
- JPH0237242U JPH0237242U JP11591088U JP11591088U JPH0237242U JP H0237242 U JPH0237242 U JP H0237242U JP 11591088 U JP11591088 U JP 11591088U JP 11591088 U JP11591088 U JP 11591088U JP H0237242 U JPH0237242 U JP H0237242U
- Authority
- JP
- Japan
- Prior art keywords
- supply amount
- fuel supply
- air
- fuel ratio
- correction value
- 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 24
- 238000001514 detection method Methods 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 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図は本考案の構成を示すブロツク図、第２
図は本考案の実施例を示すシステム概略図、第３
図は同上実施例における空燃比検出手段としての
酸素センサの出力特性図、第４図〜第６図はそれ
ぞれ同上実施例における各種制御ルーチンを示す
フローチヤート、第７図は従来の問題点を説明す
るためのタイムチヤートである。
１……機関、６……燃料噴射弁、１２……コン
トロールユニツト、１３……エアフローメータ、
１４……クランク角センサ、１５……水温センサ
、１６……酸素センサ。
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 system schematic diagram showing an embodiment of the present invention.
The figure is an output characteristic diagram of the oxygen sensor as an air-fuel ratio detection means in the above embodiment, Figures 4 to 6 are flowcharts showing various control routines in the above embodiment, and Figure 7 explains the conventional problems. This is a time chart for 1... Engine, 6... Fuel injection valve, 12... Control unit, 13... Air flow meter,
14...Crank angle sensor, 15...Water temperature sensor, 16...Oxygen sensor.
Claims (1)
と、該機関運転状態検出手段で検出した機関運転
状態に基づいて基本燃料供給量を設定する基本燃
料供給量設定手段と、機関排気成分を検出しこれ
により機関吸入混合気の空燃比の目標空燃比に対
するリツチ・リーンを検出する空燃比検出手段と
、該空燃比検出手段で検出した実際の空燃比の目
標空燃比に対するリツチ・リーンに基づいて実際
の空燃比を前記目標空燃比に近づけるように前記
基本燃料供給量を補正するためのフイードバツク
補正値を所定の制御定数に基づいて増減設定する
フイードバツク補正値設定手段と、前記空燃比検
出手段により実際の空燃比の前記目標空燃比に対
するリツチ・リーン状態が反転したことが検出さ
れたときに前記フイードバツク補正値の基準値に
対する偏差を検出するフイードバツク補正値偏差
検出手段と、該フイードバツク補正値偏差検出手
段で検出した偏差の増大に応じて前記フイードバ
ツク補正値設定手段における前記所定の制御定数
を増大補正するフイードバツク制御定数補正手段
と、前記基本燃料供給量設定手段で設定した基本
燃料供給量及び前記フイードバツク補正値設定手
段で設定したフイードバツク補正値に基づいて燃
料供給量を設定する燃料供給量設定手段と、該燃
料供給量設定手段で設定した燃料供給量に基づい
て機関に燃料を供給する燃料供給手段と、を備え
てなる内燃機関の空燃比フイードバツク制御装置
。 An engine operating state detecting means for detecting an engine operating state; a basic fuel supply amount setting means for setting a basic fuel supply amount based on the engine operating state detected by the engine operating state detecting means; and a basic fuel supply amount setting means for detecting engine exhaust components. air-fuel ratio detection means for detecting the rich lean of the air-fuel ratio of the engine intake air-fuel mixture with respect to the target air-fuel ratio; Feedback correction value setting means increases or decreases a feedback correction value for correcting the basic fuel supply amount based on a predetermined control constant so that the air-fuel ratio approaches the target air-fuel ratio, and the air-fuel ratio detecting means determines the actual Feedback correction value deviation detection means for detecting a deviation of the feedback correction value from a reference value when it is detected that the rich/lean state of the air-fuel ratio with respect to the target air-fuel ratio is reversed; Feedback control constant correction means for increasing the predetermined control constant in the feedback correction value setting means in accordance with an increase in the detected deviation; and a basic fuel supply amount set by the basic fuel supply amount setting means and the feedback correction value. a fuel supply amount setting means for setting the fuel supply amount based on the feedback correction value set by the setting means; a fuel supply means for supplying fuel to the engine based on the fuel supply amount set by the fuel supply amount setting means; An air-fuel ratio feedback control device for an internal combustion engine, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988115910U JPH089390Y2 (en) | 1988-09-05 | 1988-09-05 | Air-fuel ratio feedback control system for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988115910U JPH089390Y2 (en) | 1988-09-05 | 1988-09-05 | Air-fuel ratio feedback control system for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0237242U true JPH0237242U (en) | 1990-03-12 |
| JPH089390Y2 JPH089390Y2 (en) | 1996-03-21 |
Family
ID=31357984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988115910U Expired - Lifetime JPH089390Y2 (en) | 1988-09-05 | 1988-09-05 | Air-fuel ratio feedback control system for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH089390Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01177436A (en) * | 1987-12-28 | 1989-07-13 | Fujitsu Ten Ltd | Air-fuel ratio learning control method for internal combustion engine |
-
1988
- 1988-09-05 JP JP1988115910U patent/JPH089390Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01177436A (en) * | 1987-12-28 | 1989-07-13 | Fujitsu Ten Ltd | Air-fuel ratio learning control method for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH089390Y2 (en) | 1996-03-21 |