JPS6324355U - - Google Patents
Info
- Publication number
- JPS6324355U JPS6324355U JP11674086U JP11674086U JPS6324355U JP S6324355 U JPS6324355 U JP S6324355U JP 11674086 U JP11674086 U JP 11674086U JP 11674086 U JP11674086 U JP 11674086U JP S6324355 U JPS6324355 U JP S6324355U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- valve
- circuit
- signal
- 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
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Description
第１図は本案装置の１例の線図、第２図はその
制御回路のブロツク図、第３図は空燃比判定回路
の出力と出力回路の出力との関係を示すタイムチ
ヤート、第４図は感温弁の開度変化を示す特性図
である。
１…内燃エンジン、２…吸気通路、３…排気通
路、４…気化器、４ｄ…スロー系エアブリード通
路、６…酸素濃度センサ、７…三元触媒、８…補
助空気供給路、９…開閉制御弁、１０…感温弁、
１１…制御回路、１５…空燃比判定回路、１６…
出力回路、１７…信号保持回路。
Fig. 1 is a diagram of one example of the proposed device, Fig. 2 is a block diagram of its control circuit, Fig. 3 is a time chart showing the relationship between the output of the air-fuel ratio determination circuit and the output of the output circuit, and Fig. 4. 1 is a characteristic diagram showing changes in the opening degree of a temperature-sensitive valve. 1... Internal combustion engine, 2... Intake passage, 3... Exhaust passage, 4... Carburetor, 4d... Slow system air bleed passage, 6... Oxygen concentration sensor, 7... Three-way catalyst, 8... Auxiliary air supply passage, 9... Opening/closing Control valve, 10...temperature-sensitive valve,
11... Control circuit, 15... Air-fuel ratio determination circuit, 16...
Output circuit, 17...signal holding circuit.
Claims (1)
ンサ及びその下流側の三元触媒とを備える内燃エ
ンジンにおいて、該気化器のスロー系のエアブリ
ード通路に連る補助空気供給路に開閉制御弁と、
吸気温度が所定値以上のとき吸気温度に応じた開
度で開弁する感温弁とを介入すると共に、該制御
弁をアイドル運転時該酸素濃度センサからの信号
に応じて開閉する制御回路を設けたことを特徴と
する内燃エンジンの空燃比制御装置。 ２ 該制御回路は、該酸素濃度センサからの信号
に応じて吸入混合気の空燃比が理論空燃比を基準
にしてリツチかリーンかを判定する空燃比判定回
路と、アイドル運転時該判定回路の判定結果がリ
ツチのとき該制御弁を開弁する開弁信号を出力す
る出力回路と、該出力回路から開弁信号が出力さ
れた後所定時間経過するまでは開弁信号を継続し
て出力させる信号保持回路とを備えることを特徴
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. In an internal combustion engine equipped with a carburetor in the intake passage, an oxygen concentration sensor in the exhaust passage, and a three-way catalyst downstream thereof, the carburetor is connected to the slow air bleed passage of the carburetor. An on-off control valve in the auxiliary air supply path,
A control circuit that intervenes with a temperature-sensitive valve that opens with an opening degree corresponding to the intake air temperature when the intake air temperature is higher than a predetermined value, and opens and closes the control valve in response to a signal from the oxygen concentration sensor during idling operation. An air-fuel ratio control device for an internal combustion engine, characterized in that: 2. The control circuit includes an air-fuel ratio determination circuit that determines whether the air-fuel ratio of the intake air-fuel mixture is rich or lean based on the stoichiometric air-fuel ratio according to a signal from the oxygen concentration sensor, and an air-fuel ratio determination circuit that determines whether the air-fuel ratio of the intake air-fuel mixture is rich or lean based on the stoichiometric air-fuel ratio; An output circuit that outputs a valve-opening signal to open the control valve when the determination result is rich, and a valve-opening signal that continues to be output until a predetermined time elapses after the output circuit outputs the valve-opening signal. An air-fuel ratio control device for an internal combustion engine according to claim 1, further comprising a signal holding circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11674086U JPS6324355U (en) | 1986-07-31 | 1986-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11674086U JPS6324355U (en) | 1986-07-31 | 1986-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6324355U true JPS6324355U (en) | 1988-02-17 |
Family
ID=31001611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11674086U Pending JPS6324355U (en) | 1986-07-31 | 1986-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6324355U (en) |
-
1986
- 1986-07-31 JP JP11674086U patent/JPS6324355U/ja active Pending
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