JPH0237246U - - Google Patents
Info
- Publication number
- JPH0237246U JPH0237246U JP11590988U JP11590988U JPH0237246U JP H0237246 U JPH0237246 U JP H0237246U JP 11590988 U JP11590988 U JP 11590988U JP 11590988 U JP11590988 U JP 11590988U JP H0237246 U JPH0237246 U JP H0237246U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- engine
- fuel
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims 3
- 238000013459 approach Methods 0.000 claims 1
- 230000006866 deterioration Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000004092 self-diagnosis Methods 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 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図は酸素センサ出力と空燃
比フイードバツク補正係数ＬＡＭＢＤＡとの関係
を示す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;
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 the 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 is the oxygen sensor output and air-fuel ratio. This is a time chart showing the relationship with the feedback correction coefficient LAMBDA. 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)
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燃料供給量を補正するた
めのフイードバツク補正値を設定するフイードバ
ツク補正値設定手段と、所定のフイードバツク制
御条件成立時に燃料供給量を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
に基づいて補正設定する燃料補正設定手段と、を
含んで構成される内燃機関の空燃比制御装置にお
いて、前記フイードバツク補正値設定手段で設定
されるフイードバツク補正値によるリツチ・リー
ン制御周期の基本値を機関負荷と機関回転速度と
に基づき複数に区分された運転領域毎に記憶した
制御周期基本値記憶手段と、前記燃料補正設定手
段により燃料供給量がフイードバツク補正値に基
づきフイードバツク補正されていてかつ機関が定
常運転状態であるときに前記フイードバツク補正
値設定手段で設定されるフイードバツク補正値の
リツチ・リーン制御周期を検出する制御周期検出
手段と、該制御周期検出手段で検出した制御周期
と前記制御周期基本値記憶手段から検索した当該
運転領域の制御周期基本値とを比較し、基本値に
対して検出値が偏差を有しているときに空燃比検
出手段が劣化状態であると判別する劣化判別手段
と、を備えて構成されたことを特徴とする内燃機
関の空燃比制御装置における空燃比検出自己診断
装置。 air-fuel ratio detection means for detecting engine exhaust components and thereby detecting whether the air-fuel ratio of the engine intake air-fuel mixture is rich or lean with respect to the target air-fuel ratio; Feedback correction value setting means for setting a feedback correction value for correcting the fuel supply amount so that the actual air-fuel ratio approaches the target air-fuel ratio based on the lean condition; In the air-fuel ratio control device for an internal combustion engine, the air-fuel ratio control device for an internal combustion engine includes: fuel correction setting means for setting a correction based on the feedback correction value set by the feedback correction value setting means; The fuel supply amount is determined by the control cycle basic value storage means that stores the basic value of the rich/lean control cycle based on the correction value for each of the plurality of operating regions divided based on the engine load and the engine rotation speed, and the fuel correction setting means. a control period detection means for detecting a rich/lean control period of a feedback correction value set by the feedback correction value setting means when the engine is in a steady operating state and the engine is in a steady operating state; The control period detected by the period detection means is compared with the control period basic value of the operating region retrieved from the control period basic value storage means, and when the detected value has a deviation from the basic value, the air-fuel ratio is determined. 1. An air-fuel ratio detection self-diagnosis device for an air-fuel ratio control device for an internal combustion engine, comprising: deterioration determining means for determining that the detecting means is in a deteriorated state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11590988U JPH0237246U (en) | 1988-09-05 | 1988-09-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11590988U JPH0237246U (en) | 1988-09-05 | 1988-09-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0237246U true JPH0237246U (en) | 1990-03-12 |
Family
ID=31357982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11590988U Pending JPH0237246U (en) | 1988-09-05 | 1988-09-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0237246U (en) |
-
1988
- 1988-09-05 JP JP11590988U patent/JPH0237246U/ja active Pending