JPH0452941U - - Google Patents
Info
- Publication number
- JPH0452941U JPH0452941U JP9666890U JP9666890U JPH0452941U JP H0452941 U JPH0452941 U JP H0452941U JP 9666890 U JP9666890 U JP 9666890U JP 9666890 U JP9666890 U JP 9666890U JP H0452941 U JPH0452941 U JP H0452941U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- fuel
- feedback correction
- supply amount
- 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 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000003745 diagnosis Methods 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 2
- 238000013459 approach Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Description
第１図は本考案に係わる内燃機関におけるアル
コールセンサ故障診断装置の構成図、第２図は同
上装置の一実施例を示すシステム図、第３図は同
上実施例におけるアルコールセンサの故障診断ル
ーチンを示すフローチヤート、第４図はアルコー
ルセンサの故障状態の時における出力電圧と空燃
比フイードバツク補正係数の変化を示すタイムチ
ヤート、第５図ａ，ｂは夫々従来のアルコールセ
ンサ故障診断装置の原理と問題点を説明するグラ
フである。
１…機関、５…燃料噴射弁、６…コントロール
ユニツト、８…酸素センサ、１０…アルコールセ
ンサ。
Fig. 1 is a configuration diagram of an alcohol sensor failure diagnosis device for an internal combustion engine according to the present invention, Fig. 2 is a system diagram showing an embodiment of the same device, and Fig. 3 is a failure diagnosis routine for an alcohol sensor in the same embodiment. FIG. 4 is a time chart showing changes in the output voltage and air-fuel ratio feedback correction coefficient when the alcohol sensor is in a faulty state. FIGS. 5a and 5b are the principles and problems of the conventional alcohol sensor failure diagnosis device This is a graph explaining the points. DESCRIPTION OF SYMBOLS 1... Engine, 5... Fuel injection valve, 6... Control unit, 8... Oxygen sensor, 10... Alcohol sensor.
Claims (1)
センサと、該アルコール濃度に応じて燃料供給量
を制御する燃料供給量制御手段と、機関に供給さ
れる混合気の空燃比を検出する空燃比検出手段と
、該空燃比検出信号に基づいて、所定の運転時に
空燃比を目標空燃比に近づけるように燃料供給量
を補正するための空燃比フイードバツク補正量を
設定する空燃比フイードバツク補正量設定手段と
、を備えてなる内燃機関において、前記空燃比フ
イードバツク補正制御時におけるフイードバツク
補正係数の上限値若しくは下限値の保持時間を計
測する計測手段と、該計測時間が所定時間以上と
なつた時にアルコールセンサの故障と判定する故
障判定手段と、を設けたことを特徴とする内燃機
関におけるアルコールセンサ故障診断装置。 an alcohol sensor that detects the alcohol concentration in the fuel; a fuel supply amount control means that controls the fuel supply amount according to the alcohol concentration; an air-fuel ratio detection means that detects the air-fuel ratio of the air-fuel mixture supplied to the engine; Air-fuel ratio feedback correction amount setting means for setting an air-fuel ratio feedback correction amount for correcting the fuel supply amount so that the air-fuel ratio approaches the target air-fuel ratio during a predetermined operation, based on the air-fuel ratio detection signal. In an internal combustion engine consisting of: a measuring means for measuring a holding time of an upper limit value or a lower limit value of a feedback correction coefficient during the air-fuel ratio feedback correction control; and determining that an alcohol sensor is malfunctioning when the measured time exceeds a predetermined time. What is claimed is: 1. An alcohol sensor failure diagnosis device for an internal combustion engine, characterized in that it is provided with a failure determination means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9666890U JPH0452941U (en) | 1990-09-14 | 1990-09-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9666890U JPH0452941U (en) | 1990-09-14 | 1990-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0452941U true JPH0452941U (en) | 1992-05-06 |
Family
ID=31836381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9666890U Pending JPH0452941U (en) | 1990-09-14 | 1990-09-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0452941U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011046364A (en) * | 2009-08-28 | 2011-03-10 | Yanmar Co Ltd | On-vehicle device for transportation of unmanned helicopter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4296898A (en) * | 1977-12-23 | 1981-10-27 | Watson Ronald S | Anchor device for propeller rotator |
-
1990
- 1990-09-14 JP JP9666890U patent/JPH0452941U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4296898A (en) * | 1977-12-23 | 1981-10-27 | Watson Ronald S | Anchor device for propeller rotator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011046364A (en) * | 2009-08-28 | 2011-03-10 | Yanmar Co Ltd | On-vehicle device for transportation of unmanned helicopter |