JPS6254252U - - Google Patents
Info
- Publication number
- JPS6254252U JPS6254252U JP14678085U JP14678085U JPS6254252U JP S6254252 U JPS6254252 U JP S6254252U JP 14678085 U JP14678085 U JP 14678085U JP 14678085 U JP14678085 U JP 14678085U JP S6254252 U JPS6254252 U JP S6254252U
- Authority
- JP
- Japan
- Prior art keywords
- air
- combustion engine
- internal combustion
- valve
- fuel ratio
- 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 14
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims 2
- 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
図面は本考案の一実施例を示し、第１図は内燃
エンジンの空燃比制御装置の構成図、第２図は第
１図の電子コントロールユニツトを示すブロツク
回路図、第３図は空燃比制御実行プログラムを示
すサブルーチンである。
１……内燃エンジン、１０……負圧応動型制御
弁、１４……燃料通路、２０……作動負圧室、２
２……圧力切換弁、３１，３７……空気通路（エ
アブリード通路）、３２，３８……空気量制御弁
。
The drawings show one embodiment of the present invention, in which Fig. 1 is a block diagram of an air-fuel ratio control device for an internal combustion engine, Fig. 2 is a block circuit diagram showing the electronic control unit of Fig. 1, and Fig. 3 is an air-fuel ratio control system. This is a subroutine that indicates an execution program. DESCRIPTION OF SYMBOLS 1... Internal combustion engine, 10... Negative pressure responsive control valve, 14... Fuel passage, 20... Operating negative pressure chamber, 2
2...Pressure switching valve, 31, 37...Air passage (air bleed passage), 32, 38...Air amount control valve.
Claims (1)
燃料通路またはエアブリード通路に設けられたオ
ン―オフ２位置型電磁弁よりなる空気量制御弁と
、前記メイン系燃料通路に設けられ且つ該メイン
系燃料通路を流れる燃料量を制御する負圧応動型
制御弁と、該負圧応動型制御弁の作動負圧室へ開
弁圧及び閉弁圧を択一的に切換供給せしめる圧力
切換弁とを具備し、前記内燃エンジンがクランキ
ンク状態にある時前記圧力切換弁を開弁圧供給状
態に切り換えることにより小さな空燃比の混合気
にすると共に、吸入空気温度が所定値以下の時で
前記クランキング状態にある時及び該クランキン
グ終了後所定時間は前記空気量制御弁により更に
小さな空燃比の混合気にすることを特徴とする内
燃エンジンの空燃比制御装置。 ２ 前記圧力切換弁はオン―オフ２位置作動型電
磁弁であることを特徴とする実用新案登録請求の
範囲第１項記載の内燃エンジンの空燃比制御装置
。 ３ 前記クランキング状態とは前記内燃エンジン
の回転数が所定値以下の状態であることを特徴と
する実用新案登録請求の範囲第１項記載の内燃エ
ンジンの空燃比制御装置。[Scope of Claim for Utility Model Registration] 1. An air amount control valve consisting of an on-off two-position electromagnetic valve provided in a main system or slow system fuel passage or air bleed passage of an internal combustion engine, and an air amount control valve consisting of an on-off two-position solenoid valve installed in the main system fuel passage or slow system fuel passage or air bleed passage; a negative pressure responsive control valve that is provided and controls the amount of fuel flowing through the main system fuel passage, and selectively supplies a valve opening pressure and a valve closing pressure to an operating negative pressure chamber of the negative pressure responsive control valve. and a pressure switching valve to control the internal combustion engine, and when the internal combustion engine is in a cranking state, the pressure switching valve is switched to an open pressure supply state to create a mixture with a small air-fuel ratio, and when the intake air temperature is below a predetermined value. An air-fuel ratio control device for an internal combustion engine, characterized in that the air-fuel mixture is made to have a lower air-fuel ratio by the air amount control valve when the cranking state is in effect and for a predetermined period of time after the end of the cranking. 2. The air-fuel ratio control device for an internal combustion engine according to claim 1, wherein the pressure switching valve is an on-off two-position solenoid valve. 3. The air-fuel ratio control device for an internal combustion engine according to claim 1, wherein the cranking state is a state in which the rotational speed of the internal combustion engine is below a predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14678085U JPS6254252U (en) | 1985-09-25 | 1985-09-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14678085U JPS6254252U (en) | 1985-09-25 | 1985-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6254252U true JPS6254252U (en) | 1987-04-03 |
Family
ID=31059558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14678085U Pending JPS6254252U (en) | 1985-09-25 | 1985-09-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6254252U (en) |
-
1985
- 1985-09-25 JP JP14678085U patent/JPS6254252U/ja active Pending
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