JPS61183451U - - Google Patents
Info
- Publication number
- JPS61183451U JPS61183451U JP6646686U JP6646686U JPS61183451U JP S61183451 U JPS61183451 U JP S61183451U JP 6646686 U JP6646686 U JP 6646686U JP 6646686 U JP6646686 U JP 6646686U JP S61183451 U JPS61183451 U JP S61183451U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- signal
- increases
- flow rate
- 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 7
- 230000007423 decrease Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 2
- 238000000746 purification 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
第１図は排出ガスを三元触媒を経由して排出す
るときの各種成分の浄化率と混合ガスの空燃比と
の間の関係を示す線図、第２図はこの考案の一実
施例の断面図、第３図は第２図の実施例の制御回
路部の回路部、第４図は第２図の実施例の作用を
説明するための線図、第５図はＬＡ＃４走行モー
ドの２サイクル目における排出ガス中のＮＯＸ発
生具合を、従前のものとこの考案のものとを対比
して示す線図である。
３……排出ガスセンサ、６……気化器、７……
アクチユエータ、１０……吸気管負圧検出器、１
１……空気流量検出器、１９……リーン信号電圧
変更回路。
Fig. 1 is a diagram showing the relationship between the purification rate of various components and the air-fuel ratio of the mixed gas when exhaust gas is discharged via a three-way catalyst, and Fig. 2 is a diagram showing the relationship between the purification rate of various components and the air-fuel ratio of the mixed gas when exhaust gas is discharged via a three-way catalyst. 3 is a circuit section of the control circuit section of the embodiment shown in FIG. 2, FIG. 4 is a diagram for explaining the operation of the embodiment shown in FIG. 2, and FIG. 5 is the LA#4 running mode. FIG. 2 is a diagram showing the degree of NOX generation in the exhaust gas in the second cycle of the conventional engine and that of the present invention; FIG. 3... Exhaust gas sensor, 6... Carburetor, 7...
Actuator, 10...Intake pipe negative pressure detector, 1
1...Air flow rate detector, 19...Lean signal voltage change circuit.
Claims (1)
サの出力を目標空燃比に対応する基準値と比較し
て、その大小関係に対応して一定時間率で増減す
る積分信号を生じ、この積分信号を、その数倍の
変化時間率及びそれと同程度以上の変化で増減す
る三角波信号と比較して、その大小関係に対応し
て断続する断続信号を生じ、エアブリード流量制
御用のアクチユエータを前記断続信号に従つて駆
動して目標空燃比を得るようにし、更に、吸気管
負圧検出器１０と空気流量検出器１１とを設け、
積分信号の変化時間率を排出ガスセンサの出力に
対応する空燃比が目標空燃比より過薄の間に限り
、かつ吸気管負圧と気化器の空気流量のうち少く
とも一方がそれぞれの所定値以上である場合に限
り増大させるリーン信号電圧変更回路１９を設け
たことを特徴とする気化器の空燃比制御装置。 The output of the exhaust gas sensor corresponding to the air-fuel ratio of the mixed gas is compared with the reference value corresponding to the target air-fuel ratio to generate an integral signal that increases or decreases at a constant time rate in accordance with the magnitude relationship. , a triangular wave signal that increases and decreases at a change time rate several times that of the triangular wave signal and a change of the same degree or more, generates an intermittent signal that is intermittent in response to the magnitude relationship, and controls the actuator for air bleed flow rate control by the intermittent signal. and is further provided with an intake pipe negative pressure detector 10 and an air flow rate detector 11,
The time rate of change of the integral signal is set only when the air-fuel ratio corresponding to the output of the exhaust gas sensor is leaner than the target air-fuel ratio, and at least one of the intake pipe negative pressure and the air flow rate of the carburetor exceeds the respective predetermined value. An air-fuel ratio control device for a carburetor, characterized in that it is provided with a lean signal voltage changing circuit 19 that increases the lean signal voltage only when .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986066466U JPS6346688Y2 (en) | 1986-04-30 | 1986-04-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986066466U JPS6346688Y2 (en) | 1986-04-30 | 1986-04-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61183451U true JPS61183451U (en) | 1986-11-15 |
| JPS6346688Y2 JPS6346688Y2 (en) | 1988-12-02 |
Family
ID=30599397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986066466U Expired JPS6346688Y2 (en) | 1986-04-30 | 1986-04-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6346688Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51106828A (en) * | 1975-03-18 | 1976-09-22 | Nissan Motor | KUNENPISEIGYOSOCHI |
| JPS5297031A (en) * | 1976-02-12 | 1977-08-15 | Nissan Motor Co Ltd | Air fuel ration controller |
-
1986
- 1986-04-30 JP JP1986066466U patent/JPS6346688Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51106828A (en) * | 1975-03-18 | 1976-09-22 | Nissan Motor | KUNENPISEIGYOSOCHI |
| JPS5297031A (en) * | 1976-02-12 | 1977-08-15 | Nissan Motor Co Ltd | Air fuel ration controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6346688Y2 (en) | 1988-12-02 |
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