JPH0219850U - - Google Patents
Info
- Publication number
- JPH0219850U JPH0219850U JP9564288U JP9564288U JPH0219850U JP H0219850 U JPH0219850 U JP H0219850U JP 9564288 U JP9564288 U JP 9564288U JP 9564288 U JP9564288 U JP 9564288U JP H0219850 U JPH0219850 U JP H0219850U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- ratio control
- temperature
- operating state
- 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 10
- 238000001514 detection method Methods 0.000 claims 3
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 1
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図は本考案の構成図、第２図は第１の実施
例の全体構成図、第３図は第１の実施例の機関中
高速高負荷域を示す線図、第４図はフイードバツ
ク補正係数ＦＡＦの算出法を説明する線図、第５
図は第１の実施例の効果を説明する線図、第６図
は第１の実施例を実行するためのフローチヤート
、第７図は第１の実施例の動作の一例を示す線図
、第８図は第２の実施例の要部を示す図、第９図
は第２の実施例の機関中高速高負荷域を示す線図
、第１０図は第２の実施例を実行するためのフロ
ーチヤートである。
６……エアフローメータ、１６……排気マニホ
ルド、１８……Ｏ２センサ、２１……排気温セン
サ、２２……クランク角センサ、３０……電子制
御ユニツト、９０……吸気管負圧センサ。
Fig. 1 is a block diagram of the present invention, Fig. 2 is an overall block diagram of the first embodiment, Fig. 3 is a line diagram showing the engine medium high speed and high load region of the first embodiment, and Fig. 4 is a feedback diagram. Diagram explaining the calculation method of the correction coefficient FAF, 5th
6 is a flowchart for implementing the first embodiment; FIG. 7 is a diagram illustrating an example of the operation of the first embodiment; Fig. 8 is a diagram showing the main parts of the second embodiment, Fig. 9 is a diagram showing the engine medium-high speed and high load region of the second embodiment, and Fig. 10 is a diagram showing the main parts of the second embodiment. This is a flowchart. 6...Air flow meter, 16...Exhaust manifold, 18... O2 sensor, 21...Exhaust temperature sensor, 22...Crank angle sensor, 30...Electronic control unit, 90...Intake pipe negative pressure sensor.
Claims (1)
号に基づいて空燃比を予め定められた空燃比に制
御する第１の空燃比制御手段と、機関排気温度を
検出する排気温度検出手段と、機関運転状態を検
出する機関運転状態検出手段と、機関運転状態検
出信号が中高速高負荷運転領域内にあるか否か判
定する判定手段と、前記機関運転状態検出信号が
前記中高速高負荷運転領域内にある場合において
は前記第１の空燃比制御手段による空燃比制御を
停止して、前記排気温度が限界温度以上のときに
は空燃比をリツチ方向に制御し、前記排気温度が
前記限界温度以下のときには空燃比をリーン方向
に制御する第２の空燃比制御手段とを備えた内燃
機関の空燃比制御装置。 a first air-fuel ratio control means for controlling an air-fuel ratio to a predetermined air-fuel ratio based on an output signal of an air-fuel ratio sensor provided in an exhaust passage; an exhaust temperature detection means for detecting an engine exhaust temperature; an engine operating state detection means for detecting an operating state; a determining means for determining whether or not the engine operating state detection signal is within the medium to high speed high load operating region; If the exhaust gas temperature is within the limit temperature, the air-fuel ratio control by the first air-fuel ratio control means is stopped, and when the exhaust gas temperature is above the limit temperature, the air-fuel ratio is controlled in the rich direction; An air-fuel ratio control device for an internal combustion engine, comprising a second air-fuel ratio control means that sometimes controls the air-fuel ratio in a lean direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9564288U JPH0219850U (en) | 1988-07-21 | 1988-07-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9564288U JPH0219850U (en) | 1988-07-21 | 1988-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0219850U true JPH0219850U (en) | 1990-02-09 |
Family
ID=31320334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9564288U Pending JPH0219850U (en) | 1988-07-21 | 1988-07-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0219850U (en) |
-
1988
- 1988-07-21 JP JP9564288U patent/JPH0219850U/ja active Pending
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