JPS62137355U - - Google Patents
Info
- Publication number
- JPS62137355U JPS62137355U JP2512086U JP2512086U JPS62137355U JP S62137355 U JPS62137355 U JP S62137355U JP 2512086 U JP2512086 U JP 2512086U JP 2512086 U JP2512086 U JP 2512086U JP S62137355 U JPS62137355 U JP S62137355U
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- secondary air
- engine
- sensor
- air supply
- 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
- 239000003054 catalyst Substances 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 claims 2
- 239000000446 fuel Substances 0.000 claims 2
- 238000013021 overheating Methods 0.000 claims 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 239000007789 gas 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 1
Landscapes
- Exhaust Gas After Treatment (AREA)
Description
第１図は本考案の構成図、第２図は第１実施例
を適用したエンジンを示す断面図、第３図は第１
実施例における制御を示すフローチヤート、第４
図は第２実施例を適用したエンジンを示す断面図
、第５図は第２実施例における制御を示すフロー
チヤートである。
１０……触媒、１１……主Ｏ２センサ、１２…
…副Ｏ２センサ、２８……アイドルスイツチ、２
９……エアフロメータ、３３，３４……空気管。
Fig. 1 is a configuration diagram of the present invention, Fig. 2 is a sectional view showing an engine to which the first embodiment is applied, and Fig. 3 is a sectional view of the engine to which the first embodiment is applied.
Flowchart showing control in the example, No. 4
The figure is a sectional view showing an engine to which the second embodiment is applied, and FIG. 5 is a flowchart showing control in the second embodiment. 10...Catalyst, 11...Main O2 sensor, 12...
...Sub- O2 sensor, 28...Idle switch, 2
9... Air flow meter, 33, 34... Air pipe.
Claims (1)
けられ、該触媒の上流側に主Ｏ２センサ、該触媒
の下流側に副Ｏ２センサがそれぞれ配設された酸
素濃度検出システムであつて、上記触媒と副Ｏ２
センサの間に２次空気を供給する手段と、上記触
媒の異常過熱を防止するために吸気系への供給燃
料を増量させる手段と、エンジンがアイドル運転
していることを検出する手段とを備え、上記２次
空気供給手段は、上記触媒の異常過熱の防止のた
めに燃料増量中である時、およびエンジンがアイ
ドル運転中である時、２次空気を供給することを
特徴とする酸素濃度検出システムの２次空気供給
装置。 An oxygen concentration detection system in which an exhaust gas purifying catalyst is provided in an engine exhaust system, a main O 2 sensor is provided upstream of the catalyst, and a sub O 2 sensor is provided downstream of the catalyst, The above catalyst and secondary O2
A means for supplying secondary air between the sensors, a means for increasing the amount of fuel supplied to the intake system to prevent abnormal overheating of the catalyst, and a means for detecting that the engine is running at idle. , wherein the secondary air supply means supplies secondary air when fuel is being increased to prevent abnormal overheating of the catalyst and when the engine is idling. Secondary air supply for the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2512086U JPS62137355U (en) | 1986-02-25 | 1986-02-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2512086U JPS62137355U (en) | 1986-02-25 | 1986-02-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62137355U true JPS62137355U (en) | 1987-08-29 |
Family
ID=30824976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2512086U Pending JPS62137355U (en) | 1986-02-25 | 1986-02-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62137355U (en) |
-
1986
- 1986-02-25 JP JP2512086U patent/JPS62137355U/ja active Pending
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