JPH0352353U - - Google Patents
Info
- Publication number
- JPH0352353U JPH0352353U JP11275089U JP11275089U JPH0352353U JP H0352353 U JPH0352353 U JP H0352353U JP 11275089 U JP11275089 U JP 11275089U JP 11275089 U JP11275089 U JP 11275089U JP H0352353 U JPH0352353 U JP H0352353U
- Authority
- JP
- Japan
- Prior art keywords
- alcohol
- concentration
- sensor
- fuel
- switching
- 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
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000000446 fuel Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims 3
- 230000005856 abnormality Effects 0.000 claims 2
- 238000011084 recovery Methods 0.000 claims 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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図は本考案の構成を示す機能ブロツク図、
第２図は本実施例のシステム図、第３図は本実施
例の制御内容を示すフローチヤート、第４図及び
第５図は従来の問題点を示す線図である。
７……燃料噴射弁、１３……コントロールユニ
ツト、１８……アルコールセンサ、２０……空燃
比センサ。
Figure 1 is a functional block diagram showing the configuration of the present invention.
FIG. 2 is a system diagram of this embodiment, FIG. 3 is a flowchart showing control details of this embodiment, and FIGS. 4 and 5 are diagrams showing problems of the conventional system. 7...Fuel injection valve, 13...Control unit, 18...Alcohol sensor, 20...Air-fuel ratio sensor.
Claims (1)
るアルコールセンサと、 アルコールセンサの出力電圧に基づいて燃料中
のアルコール濃度を検出する濃度検出手段と、 アルコール濃度に応じて機関への燃料供給量を
補正して設定する供給量設定手段と、 アルコールセンサの出力電圧に基づいてアルコ
ールセンサの異常の有無を判定する異常判定手段
と、 異常有りと判定されたときに、供給量設定手段
に入力するアルコール濃度を、濃度検出手段によ
る検出値から、所定の濃度を初期値とする推定値
に、切換える第１の切換手段と、 機関の空燃比を検出する空燃比センサと、 第１の切換手段による切換え後、所定の時間、
空燃比センサからの信号に基づき、空燃比のリツ
チ・リーンに応じてアルコール濃度の推定値を増
減する濃度推定手段と、 前記所定の期間経過後に、濃度検出手段による
検出値と濃度推定手段による最終的な推定値との
差に基づいてアルコールセンサの回復の有無を判
定する回復判定手段と、 回復有りと判定されたときに供給量設定手段に
入力するアルコール濃度を前記推定値から濃度検
出手段による検出値に切換える第２の切換手段と
、 を有することを特徴とする混合燃料供給制御装置
のフエイルセイフ装置。[Scope of Claim for Utility Model Registration] An alcohol sensor that outputs a voltage according to the alcohol concentration in fuel, a concentration detection means that detects the alcohol concentration in fuel based on the output voltage of the alcohol sensor, and a supply amount setting means for correcting and setting the amount of fuel supplied to the engine; an abnormality determining means for determining whether there is an abnormality in the alcohol sensor based on the output voltage of the alcohol sensor; a first switching means that switches the alcohol concentration input to the amount setting means from a value detected by the concentration detection means to an estimated value with a predetermined concentration as an initial value; an air-fuel ratio sensor that detects the air-fuel ratio of the engine; After switching by the first switching means, a predetermined time,
concentration estimating means for increasing or decreasing an estimated value of alcohol concentration according to the richness or leanness of the air-fuel ratio based on a signal from the air-fuel ratio sensor; recovery determination means for determining whether or not the alcohol sensor has recovered based on the difference from the estimated value; and a concentration detection means for determining the alcohol concentration input to the supply amount setting means from the estimated value when it is determined that recovery has occurred. A fail-safe device for a mixed fuel supply control device, comprising: second switching means for switching to a detected value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11275089U JP2509020Y2 (en) | 1989-09-28 | 1989-09-28 | Fail-safe device of mixed fuel supply control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11275089U JP2509020Y2 (en) | 1989-09-28 | 1989-09-28 | Fail-safe device of mixed fuel supply control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0352353U true JPH0352353U (en) | 1991-05-21 |
| JP2509020Y2 JP2509020Y2 (en) | 1996-08-28 |
Family
ID=31661187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11275089U Expired - Lifetime JP2509020Y2 (en) | 1989-09-28 | 1989-09-28 | Fail-safe device of mixed fuel supply control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2509020Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010059919A (en) * | 2008-09-05 | 2010-03-18 | Nippon Soken Inc | Fuel supply system |
-
1989
- 1989-09-28 JP JP11275089U patent/JP2509020Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010059919A (en) * | 2008-09-05 | 2010-03-18 | Nippon Soken Inc | Fuel supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2509020Y2 (en) | 1996-08-28 |
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