JPS6226548U - - Google Patents
Info
- Publication number
- JPS6226548U JPS6226548U JP11848985U JP11848985U JPS6226548U JP S6226548 U JPS6226548 U JP S6226548U JP 11848985 U JP11848985 U JP 11848985U JP 11848985 U JP11848985 U JP 11848985U JP S6226548 U JPS6226548 U JP S6226548U
- Authority
- JP
- Japan
- Prior art keywords
- throttle valve
- feedback
- secondary throttle
- fuel ratio
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
図面は本考案の実施例を示すもので、第１図は
２バレル２ステージ型気化器及びその空燃比制御
装置の全体構成図、第２図はＯ２フイードバツク
制御領域等を説明するための説明図、第３図はコ
ントロールユニツトでなされる制御のルーチンの
フローチヤート、第４図はＰＩ動作によるフイー
ドバツク制御のＰ値とＩ値とを説明する説明図で
ある。
１…２バレル２ステージ型気化器、５Ａ…２次
スロツトル弁、３１…ブースト圧センサ、３２…
回転数センサ、３３…Ｏ２センサ、３４…コント
ロールユニツト。
The drawings show an embodiment of the present invention. Fig. 1 is an overall configuration diagram of a two-barrel two-stage carburetor and its air-fuel ratio control device, and Fig. 2 is an explanation for explaining the O2 feedback control area, etc. 3 is a flow chart of the control routine performed by the control unit, and FIG. 4 is an explanatory diagram illustrating the P value and I value of feedback control by PI operation. 1...2-barrel 2-stage carburetor, 5A...secondary throttle valve, 31...boost pressure sensor, 32...
Rotation speed sensor, 33... O2 sensor, 34...control unit.
Claims (1)
り遅れて開弁を開始する２次スロツトル弁を有す
る気化器と、上記２次スロツトル弁の実質的な開
弁域を検出するエンジンの運転状態検出手段と、
排気ガス中のＯ２濃度を検出するＯ２センサと、
上記運転状態検出手段とＯ２センサからの出力を
受け２次スロツトル弁の実質的な開弁域では空燃
比をＯ２フイードバツク制御する一方２次スロツ
トル弁の実質的な開弁域ではＯ２フイードバツク
制御を解除する制御手段とを備えたエンジンにお
いて、 上記制御手段は２次スロツトル弁の開弁開始初
期の運転状態から減速したときにそれ以外のとき
よりも大きなフイードバツク定数で制御するよう
にフイードバツク定数を設定するフイードバツク
定数設定手段を備えていることを特徴とする気化
器の空燃比制御装置。[Claims for Utility Model Registration] A carburetor having a primary throttle valve and a secondary throttle valve that starts opening later than the primary throttle valve, and detecting the substantial opening range of the secondary throttle valve. means for detecting the operating state of the engine;
an O 2 sensor that detects O 2 concentration in exhaust gas;
In response to the outputs from the operating state detection means and the O2 sensor, the air-fuel ratio is controlled by O2 feedback in the substantially open range of the secondary throttle valve, while the air-fuel ratio is controlled by O2 feedback in the substantially open range of the secondary throttle valve. In the engine, the control means has a feedback constant so that control is performed with a larger feedback constant than at other times when the engine is decelerated from the initial operating state when the secondary throttle valve starts opening. An air-fuel ratio control device for a carburetor, characterized in that it is equipped with a feedback constant setting means for setting a feedback constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985118489U JPH0236930Y2 (en) | 1985-07-31 | 1985-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985118489U JPH0236930Y2 (en) | 1985-07-31 | 1985-07-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6226548U true JPS6226548U (en) | 1987-02-18 |
| JPH0236930Y2 JPH0236930Y2 (en) | 1990-10-05 |
Family
ID=31004987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985118489U Expired JPH0236930Y2 (en) | 1985-07-31 | 1985-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0236930Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5297031A (en) * | 1976-02-12 | 1977-08-15 | Nissan Motor Co Ltd | Air fuel ration controller |
| JPS56126655A (en) * | 1980-03-07 | 1981-10-03 | Fuji Heavy Ind Ltd | Air-fuel ratio controlling apparatus |
-
1985
- 1985-07-31 JP JP1985118489U patent/JPH0236930Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5297031A (en) * | 1976-02-12 | 1977-08-15 | Nissan Motor Co Ltd | Air fuel ration controller |
| JPS56126655A (en) * | 1980-03-07 | 1981-10-03 | Fuji Heavy Ind Ltd | Air-fuel ratio controlling apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0236930Y2 (en) | 1990-10-05 |
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