JPH02139341U - - Google Patents
Info
- Publication number
- JPH02139341U JPH02139341U JP4682889U JP4682889U JPH02139341U JP H02139341 U JPH02139341 U JP H02139341U JP 4682889 U JP4682889 U JP 4682889U JP 4682889 U JP4682889 U JP 4682889U JP H02139341 U JPH02139341 U JP H02139341U
- Authority
- JP
- Japan
- Prior art keywords
- fuel ratio
- concentration
- air
- detection means
- engine
- 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
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案の混合燃料使用機関の異常検出
装置の構成を示すブロツク図；第２図は本考案の
装置を備えた内燃機関の構成図；第３図は第２図
の制御回路の動作を示すフローチヤート；第４図
はエンジン回転数及び吸気管圧力により目標空燃
比を決定するためのマツプ；第５図はアルコール
濃度−センサ出力値特性を示す線図。
１０…エンジン、２０…燃料パイプ、２６…燃
料噴射弁、２７…燃料タンク、２８…燃料ポンプ
、３０…アルコール濃度センサ、３２…空燃比セ
ンサ、４１…制御回路。
Fig. 1 is a block diagram showing the configuration of an abnormality detection device for a mixed fuel engine of the present invention; Fig. 2 is a block diagram of an internal combustion engine equipped with the device of the present invention; Fig. 3 is a block diagram of the control circuit of Fig. 2. A flowchart showing the operation; FIG. 4 is a map for determining the target air-fuel ratio based on engine speed and intake pipe pressure; FIG. 5 is a diagram showing alcohol concentration-sensor output value characteristics. DESCRIPTION OF SYMBOLS 10... Engine, 20... Fuel pipe, 26... Fuel injection valve, 27... Fuel tank, 28... Fuel pump, 30... Alcohol concentration sensor, 32... Air-fuel ratio sensor, 41... Control circuit.
Claims (1)
目標空燃比演算手段と、 機関の空燃比を検出する空燃比検出手段と、 ガソリンに混合された別の燃料の濃度を検出す
る濃度検出手段と、 検出濃度の変化を監視し、変化量が所定値以上
の時に警戒信号を出力する濃度変化検出手段と、 この警戒信号により検出された空燃比と上記目
標空燃比との差を所定時間監視し、この差が所定
値以上であることが検出された時には前期濃度検
出手段を異常と判定する異常検出手段と、 を備えた混合燃料使用機関の異常検出装置。[Scope of Claim for Utility Model Registration] Target air-fuel ratio calculating means for calculating a target air-fuel ratio according to the operating conditions of the engine; air-fuel ratio detecting means for detecting the air-fuel ratio of the engine; Concentration detection means for detecting concentration; Concentration change detection means for monitoring changes in detected concentration and outputting a warning signal when the amount of change exceeds a predetermined value; and an air-fuel ratio detected by this warning signal and the target air-fuel ratio. An abnormality detection device for an engine using a mixed fuel, comprising: abnormality detection means for monitoring the difference between the two for a predetermined period of time, and determining that the previous concentration detection means is abnormal when the difference is detected to be equal to or greater than a predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4682889U JPH02139341U (en) | 1989-04-24 | 1989-04-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4682889U JPH02139341U (en) | 1989-04-24 | 1989-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02139341U true JPH02139341U (en) | 1990-11-21 |
Family
ID=31562240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4682889U Pending JPH02139341U (en) | 1989-04-24 | 1989-04-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02139341U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011179474A (en) * | 2010-03-03 | 2011-09-15 | Toyota Motor Corp | Abnormality detector for internal combustion engine |
-
1989
- 1989-04-24 JP JP4682889U patent/JPH02139341U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011179474A (en) * | 2010-03-03 | 2011-09-15 | Toyota Motor Corp | Abnormality detector for internal combustion engine |