JPS63138445U - - Google Patents
Info
- Publication number
- JPS63138445U JPS63138445U JP3018987U JP3018987U JPS63138445U JP S63138445 U JPS63138445 U JP S63138445U JP 3018987 U JP3018987 U JP 3018987U JP 3018987 U JP3018987 U JP 3018987U JP S63138445 U JPS63138445 U JP S63138445U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel
- fuel ratio
- control device
- output
- 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
- 239000000446 fuel Substances 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims 2
- 239000002828 fuel tank Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000010926 purge Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Description
第１図は本考案の構成を明示するためのエンジ
ンの空燃比制御装置の全体構成図、第２図は具体
例のエンジンの概略構成図、第３図はコントロー
ルユニツトの作動を説明するためのフローチヤー
ト図である。
１……エンジン、２……吸気通路、３……燃料
供給手段、４……蒸発燃料排出抑止装置、５……
蒸発燃料供給通路、６……排気通路、７……空燃
比センサ、８……空燃比制御手段、９……故障判
定手段、１０……蒸発燃料供給判定手段、１９…
…パージバルブ、２０……キヤニスタ、２３……
コントロールユニツト。
Fig. 1 is an overall configuration diagram of an engine air-fuel ratio control device to clearly demonstrate the configuration of the present invention, Fig. 2 is a schematic configuration diagram of a concrete example engine, and Fig. 3 is a diagram illustrating the operation of the control unit. It is a flowchart diagram. DESCRIPTION OF SYMBOLS 1...Engine, 2...Intake passage, 3...Fuel supply means, 4...Evaporative fuel emission suppression device, 5...
Evaporative fuel supply passage, 6... Exhaust passage, 7... Air-fuel ratio sensor, 8... Air-fuel ratio control means, 9... Failure determining means, 10... Evaporative fuel supply determining means, 19...
...Purge valve, 20...Canister, 23...
control unit.
Claims (1)
ン運転中に該吸着した燃料をエンジンの吸気系に
供給する蒸発燃料排出抑止装置を備えたエンジン
において、空気過剰率λが１付近で出力が急変す
る空燃比センサを配設し、該空燃比センサの出力
に基づいて混合気の空燃比を目標空燃比に制御す
る空燃比制御装置であつて、前記蒸発燃料排出抑
止装置による吸気系への蒸発燃料の供給量が所定
量以下の状態を検出する蒸発燃料供給判定手段と
、該蒸発燃料供給判定手段の信号を受け、蒸発燃
料の供給量が所定量以下でかつ前記空燃比センサ
の出力が一定時間以上変化しないときに空燃比制
御系の故障を判定検出する故障判定手段とを備え
たことを特徴とするエンジンの空燃比制御装置。 In an engine equipped with an evaporative fuel emission control device that adsorbs evaporative fuel from a fuel tank, etc. and supplies the adsorbed fuel to the engine intake system during engine operation, the output suddenly changes when the excess air ratio λ is around 1. An air-fuel ratio control device that is provided with an air-fuel ratio sensor and controls the air-fuel ratio of the air-fuel mixture to a target air-fuel ratio based on the output of the air-fuel ratio sensor, the device comprising: an air-fuel ratio control device that controls the air-fuel ratio of the air-fuel mixture to a target air-fuel ratio based on the output of the air-fuel ratio sensor; vaporized fuel supply determining means for detecting a state in which the supplied amount of the vaporized fuel is less than a predetermined amount; and upon receiving a signal from the vaporized fuel supply determining means, the vaporized fuel supply amount is less than the predetermined amount and the output of the air-fuel ratio sensor remains unchanged for a certain period of time. 1. An air-fuel ratio control device for an engine, comprising a failure determining means for determining and detecting a failure in an air-fuel ratio control system when the air-fuel ratio does not change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987030189U JPH0526282Y2 (en) | 1987-03-02 | 1987-03-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987030189U JPH0526282Y2 (en) | 1987-03-02 | 1987-03-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63138445U true JPS63138445U (en) | 1988-09-12 |
| JPH0526282Y2 JPH0526282Y2 (en) | 1993-07-02 |
Family
ID=30834771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987030189U Expired - Lifetime JPH0526282Y2 (en) | 1987-03-02 | 1987-03-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0526282Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019031918A (en) * | 2017-08-04 | 2019-02-28 | 三菱自動車工業株式会社 | Failure detection device of fuel system of engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6329050A (en) * | 1986-07-21 | 1988-02-06 | Toyota Motor Corp | Trouble diagnostics for air-fuel ratio control system |
| JPS6385237A (en) * | 1986-09-29 | 1988-04-15 | Toyota Motor Corp | Failure diagnosis method for air-fuel ratio control system |
| JPS63124847A (en) * | 1986-11-14 | 1988-05-28 | Honda Motor Co Ltd | Abnormality detecting method for exhaust gas concentration detecting system for internal combustion engine |
-
1987
- 1987-03-02 JP JP1987030189U patent/JPH0526282Y2/ja not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6329050A (en) * | 1986-07-21 | 1988-02-06 | Toyota Motor Corp | Trouble diagnostics for air-fuel ratio control system |
| JPS6385237A (en) * | 1986-09-29 | 1988-04-15 | Toyota Motor Corp | Failure diagnosis method for air-fuel ratio control system |
| JPS63124847A (en) * | 1986-11-14 | 1988-05-28 | Honda Motor Co Ltd | Abnormality detecting method for exhaust gas concentration detecting system for internal combustion engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019031918A (en) * | 2017-08-04 | 2019-02-28 | 三菱自動車工業株式会社 | Failure detection device of fuel system of engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0526282Y2 (en) | 1993-07-02 |