JPS6392020U - - Google Patents
Info
- Publication number
- JPS6392020U JPS6392020U JP18775986U JP18775986U JPS6392020U JP S6392020 U JPS6392020 U JP S6392020U JP 18775986 U JP18775986 U JP 18775986U JP 18775986 U JP18775986 U JP 18775986U JP S6392020 U JPS6392020 U JP S6392020U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- detection means
- secondary air
- ratio control
- 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 12
- 238000001514 detection method Methods 0.000 claims description 7
- 235000014676 Phragmites communis Nutrition 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Exhaust Gas After Treatment (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案の全体構成図、第２〜５図は本
考案の実施例を示すもので、第２図は空燃比制御
システム図、第３，４図は制御動作を夫々示すフ
ローチヤート図、第５図は制御領域を示すグラフ
である。
１……エンジン、６……排気通路、９……スロ
ツトルバルブ、１１……空燃比検出手段（Ｏ２セ
ンサ）、１３，１４，１５……２次エア供給手段
（２次エア通路、２次エアコントロールバルブ、
リードバルブ）、２０……空燃比制御手段、２次
エア供給制限手段（コントロールユニツト）、２
２……エンジン回転数検出手段（回転数センサ）
。
Fig. 1 is an overall configuration diagram of the present invention, Figs. 2 to 5 show embodiments of the invention, Fig. 2 is a diagram of an air-fuel ratio control system, and Figs. 3 and 4 are flowcharts showing control operations, respectively. FIG. 5 is a graph showing the control area. DESCRIPTION OF SYMBOLS 1... Engine, 6... Exhaust passage, 9... Throttle valve, 11... Air-fuel ratio detection means ( O2 sensor), 13, 14, 15... Secondary air supply means (secondary air passage, 2 Next air control valve,
reed valve), 20... air-fuel ratio control means, secondary air supply restriction means (control unit), 2
2...Engine speed detection means (rotation speed sensor)
.
Claims (1)
度から燃焼室に供給されている混合気の空燃比を
検出する空燃比検出手段と、スロツトルバルブが
全閉もしくは略全閉の時に上記空燃比検出手段上
流の排気通路に２次エアを供給するリードバルブ
式の２次エア供給手段と、上記空燃比検出手段の
出力に応じて空燃比をフイードバツク制御する空
燃比制御手段とを有するエンジンの空燃比制御装
置であつて、エンジン回転数検出手段と、該検出
手段の出力を受けて所定エンジン回転数以上の領
域で上記２次エア供給手段による２次エアの供給
を制限する２次エア供給制限手段とが備えられて
いることを特徴とするエンジンの空燃比制御装置
。 an air-fuel ratio detection means provided in the exhaust passage for detecting the air-fuel ratio of the air-fuel mixture supplied to the combustion chamber from the residual oxygen concentration in the exhaust gas; An air-fuel ratio control means for an engine having a reed valve type secondary air supply means for supplying secondary air to an exhaust passage upstream of the detection means, and an air-fuel ratio control means for feedback-controlling the air-fuel ratio according to the output of the air-fuel ratio detection means. The fuel ratio control device includes an engine rotation speed detection means, and a secondary air supply limiter that receives the output of the detection means and limits the supply of secondary air by the secondary air supply means in a region above a predetermined engine rotation speed. 1. An air-fuel ratio control device for an engine, comprising: means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18775986U JPS6392020U (en) | 1986-12-04 | 1986-12-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18775986U JPS6392020U (en) | 1986-12-04 | 1986-12-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6392020U true JPS6392020U (en) | 1988-06-14 |
Family
ID=31138519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18775986U Pending JPS6392020U (en) | 1986-12-04 | 1986-12-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6392020U (en) |
-
1986
- 1986-12-04 JP JP18775986U patent/JPS6392020U/ja active Pending
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