JPH0378941U - - Google Patents
Info
- Publication number
- JPH0378941U JPH0378941U JP14063489U JP14063489U JPH0378941U JP H0378941 U JPH0378941 U JP H0378941U JP 14063489 U JP14063489 U JP 14063489U JP 14063489 U JP14063489 U JP 14063489U JP H0378941 U JPH0378941 U JP H0378941U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- ratio control
- self
- control system
- 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 8
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000004092 self-diagnosis Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
Description
第１図は筒内燃料噴射式きのこ弁付２サイクル
内燃機関の要部断面模式図、第２図は同上エンジ
ンのバルブタイミング線図、第３図は失火判定ル
ーチンのフローチヤート、第４図は第１実施例の
自己診断ルーチンのフローチヤート、第５図はＯ
２センサ出力とＦＡＦとの經時変化を示す線図で
、ａはリーン状態が続いた場合、ｂはリツチ状態
が続いた場合を示す。第６図は空燃比Ｆ／Ｂ制御
ルーチンのフローチヤート、第７図は第２実施例
の自己診断ルーチンのフローチヤートを示す。
１……２サイクル内燃機関、２……吸気弁、３
……排気弁、４……燃料噴射弁、１１……酸素セ
ンサ、１４…燃焼光センサ、２０……コンピユー
タ。
Figure 1 is a schematic cross-sectional view of the main parts of a two-stroke internal combustion engine with in-cylinder fuel injection and a mushroom valve, Figure 2 is a valve timing diagram of the same engine, Figure 3 is a flowchart of the misfire determination routine, and Figure 4 is a flowchart of the misfire determination routine. A flowchart of the self-diagnosis routine of the first embodiment, FIG.
2 is a diagram showing the change over time between the two sensor output and FAF, where a shows a case where a lean state continues, and b shows a case where a rich state continues. FIG. 6 is a flowchart of the air-fuel ratio F/B control routine, and FIG. 7 is a flowchart of the self-diagnosis routine of the second embodiment. 1...Two-stroke internal combustion engine, 2...Intake valve, 3
...Exhaust valve, 4...Fuel injection valve, 11...Oxygen sensor, 14...Combustion light sensor, 20...Computer.
Claims (1)
機関に供給される燃料噴射量を補正する空燃比制
御装置を備えた２サイクル内燃機関において、前
記酸素センサの出力値に基づいて空燃比制御系の
自己診断を行う手段と、失火を検出する手段と、
失火発生時空燃比制御系の自己診断を禁止する手
段を備えたことを特徴とする２サイクル内燃機関
の空燃比制御系自己診断装置。 Depending on the output value of the oxygen sensor installed in the exhaust system,
In a two-stroke internal combustion engine equipped with an air-fuel ratio control device that corrects the amount of fuel injection supplied to the engine, means for self-diagnosing the air-fuel ratio control system based on the output value of the oxygen sensor, and means for detecting misfire. and,
1. A self-diagnosis device for an air-fuel ratio control system for a two-stroke internal combustion engine, comprising means for prohibiting self-diagnosis of the air-fuel ratio control system when a misfire occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14063489U JPH0378941U (en) | 1989-12-06 | 1989-12-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14063489U JPH0378941U (en) | 1989-12-06 | 1989-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0378941U true JPH0378941U (en) | 1991-08-12 |
Family
ID=31687587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14063489U Pending JPH0378941U (en) | 1989-12-06 | 1989-12-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0378941U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6807806B2 (en) | 1993-04-09 | 2004-10-26 | Hitachi, Ltd. | Diagnostic equipment for an exhaust gas cleaning apparatus |
-
1989
- 1989-12-06 JP JP14063489U patent/JPH0378941U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6807806B2 (en) | 1993-04-09 | 2004-10-26 | Hitachi, Ltd. | Diagnostic equipment for an exhaust gas cleaning apparatus |
| US7117664B2 (en) | 1993-04-09 | 2006-10-10 | Hitachi, Ltd. | Diagnostic equipment for an exhaust gas cleaning apparatus |