JPH02149845U - - Google Patents
Info
- Publication number
- JPH02149845U JPH02149845U JP5905889U JP5905889U JPH02149845U JP H02149845 U JPH02149845 U JP H02149845U JP 5905889 U JP5905889 U JP 5905889U JP 5905889 U JP5905889 U JP 5905889U JP H02149845 U JPH02149845 U JP H02149845U
- Authority
- JP
- Japan
- Prior art keywords
- fuel ratio
- air
- downstream
- way catalyst
- internal combustion
- 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 9
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Exhaust Gas After Treatment (AREA)
Description
第１図は本考案の構成を説明するための全体ブ
ロツク図、第２図は本考案に係る内燃機関の空燃
比制御装置の一実施例を示す全体概略図、第３図
はチタニア型Ｏ２センサの回路図、第４図はチタ
ニア型Ｏ２センサの出力特性を示す図、第５図、
第７図、第８図、第９図は第４図の制御回路の動
作を説明するためのフローチヤート、第６図は第
５図のフローチヤートと補足説明するためのタイ
ミング図である。
１……機関本体、２……エアフローメータ、４
……デイストリビユータ、５，６……クランク角
センサ、１０……制御回路、１２……触媒コンバ
ータ、１３……チタニア型上流側Ｏ２センサ、１
５……ジルコニア型もしくはチタニア型下流側Ｏ
２センサ、１７……アイドルスイツチ。
FIG. 1 is an overall block diagram for explaining the configuration of the present invention, FIG. 2 is an overall schematic diagram showing an embodiment of an air-fuel ratio control device for an internal combustion engine according to the present invention, and FIG. 3 is a titania type O 2 The circuit diagram of the sensor, Fig. 4 is a diagram showing the output characteristics of the titania type O 2 sensor, Fig. 5,
7, 8, and 9 are flowcharts for explaining the operation of the control circuit of FIG. 4, and FIG. 6 is a timing diagram for supplementary explanation to the flowchart of FIG. 5. 1... Engine body, 2... Air flow meter, 4
... Distributor, 5, 6 ... Crank angle sensor, 10 ... Control circuit, 12 ... Catalytic converter, 13 ... Titania type upstream O 2 sensor, 1
5...zirconia type or titania type downstream side O
2 sensors, 17...Idle switch.
Claims (1)
前記機関の空燃比を検出する下流側空燃比センサ
と、 該下流側空燃比センサの出力がリツチ直近のリ
ーンを示すように前記下流側空燃比センサの出力
に応じて前記機関の空燃比を調整する空燃比調整
手段と、 を具備する内燃機関の空燃比制御装置。[Scope of claim for utility model registration] A three-way catalyst provided in an exhaust passage of an internal combustion engine, and a three-way catalyst provided in an exhaust passage downstream of the three-way catalyst,
a downstream air-fuel ratio sensor for detecting an air-fuel ratio of the engine; and adjusting the air-fuel ratio of the engine according to the output of the downstream air-fuel ratio sensor so that the output of the downstream air-fuel ratio sensor indicates a rich or a recent lean. An air-fuel ratio control device for an internal combustion engine, comprising: an air-fuel ratio adjusting means for controlling the air-fuel ratio;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5905889U JPH02149845U (en) | 1989-05-24 | 1989-05-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5905889U JPH02149845U (en) | 1989-05-24 | 1989-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02149845U true JPH02149845U (en) | 1990-12-21 |
Family
ID=31585223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5905889U Pending JPH02149845U (en) | 1989-05-24 | 1989-05-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02149845U (en) |
-
1989
- 1989-05-24 JP JP5905889U patent/JPH02149845U/ja active Pending