JPS6078956U - Air fuel ratio control device - Google Patents
Air fuel ratio control deviceInfo
- Publication number
- JPS6078956U JPS6078956U JP17217683U JP17217683U JPS6078956U JP S6078956 U JPS6078956 U JP S6078956U JP 17217683 U JP17217683 U JP 17217683U JP 17217683 U JP17217683 U JP 17217683U JP S6078956 U JPS6078956 U JP S6078956U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- voltage
- lean
- fuel ratio
- output
- 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
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は酸素センサの断面図、第２図ａ ”−ｃは１、
その出力特性を示す図、第３図は従来の空燃比側′御装
置を示す回路図、第４，５図は本考案による空燃比制御
装置の一実施例を示す図であり、第４図はその制御回路
図、第５図ａ〜ｅはその作用説明図である。
１・・・・・・酸素センサ、２１・・・・・・微分手段
、２２・・・・・・波形整形手段、２３・・・・・・電
圧設定手段、２６・・・・・・変化率判別手段、２９・
・・・・・比較手段、３０・・・・・・フィードバック
制御手段。Figure 1 is a cross-sectional view of the oxygen sensor, Figure 2 a''-c is 1,
3 is a circuit diagram showing a conventional air-fuel ratio control device, and FIGS. 4 and 5 are diagrams showing an embodiment of the air-fuel ratio control device according to the present invention. 5 is a control circuit diagram thereof, and FIGS. 5 a to 5 e are diagrams illustrating its operation. 1... Oxygen sensor, 21... Differentiating means, 22... Waveform shaping means, 23... Voltage setting means, 26... Change Rate discrimination means, 29.
... Comparison means, 30 ... Feedback control means.
Claims (1)
、酸素センサの出力を微分し微分信号を出力する微分手
段と、微分信号を所定基準値と比較して酸素センサ出力
の変化率の大きさを判別する変化率判別手段と、酸素セ
ンサ出力の変化率が所定値以上であるとき、微分信号を
積分し、変化率が所定値未満であるとき、所定のリッチ
電圧あるいはリーン電圧に設定し、整形信号として出力
する波形整形手段と、整形信号を比較基準値と比較して
空燃比のリッチ・リーンを判断しリッチ信号・リーン信
号を択一的に出力する比較手段と、比較手段からのリッ
チ信号・リーン信号に基づいて空燃比をフィードバック
制御するフィードバック制御手段と、比較手段からリッ
チ信号が出力されているとき比較基準値よりも所定値高
い電圧を前記リッチ電圧とし、リーン信号が出力されて
いるとき比較基準値よりも所定値低い電圧を前記リーン
電圧として波形整形手段に出力する電圧設定手段と、を
備えたことを特徴とする空燃比制御装置。An oxygen sensor having a characteristic that the output changes suddenly at a predetermined air-fuel ratio, a differentiating means for differentiating the output of the oxygen sensor and outputting a differential signal, and comparing the differential signal with a predetermined reference value to determine the rate of change in the oxygen sensor output. a rate of change determination means for determining the rate of change of the oxygen sensor output; when the rate of change of the oxygen sensor output is greater than or equal to a predetermined value, the differential signal is integrated; when the rate of change is less than the predetermined value, the voltage is set to a predetermined rich voltage or lean voltage; a waveform shaping means for outputting a shaping signal; a comparison means for determining whether the air-fuel ratio is rich or lean by comparing the shaping signal with a comparison reference value; and outputting a rich signal or a lean signal alternatively; Feedback control means for feedback controlling the air-fuel ratio based on the signal/lean signal, and a voltage higher than a comparison reference value by a predetermined value when the rich signal is output from the comparison means is set as the rich voltage, and the lean signal is output. an air-fuel ratio control device comprising: voltage setting means for outputting a voltage lower by a predetermined value than a comparison reference value to the waveform shaping means as the lean voltage when the lean voltage is lower than the comparison reference value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17217683U JPS6078956U (en) | 1983-11-07 | 1983-11-07 | Air fuel ratio control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17217683U JPS6078956U (en) | 1983-11-07 | 1983-11-07 | Air fuel ratio control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6078956U true JPS6078956U (en) | 1985-06-01 |
Family
ID=30375373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17217683U Pending JPS6078956U (en) | 1983-11-07 | 1983-11-07 | Air fuel ratio control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6078956U (en) |
-
1983
- 1983-11-07 JP JP17217683U patent/JPS6078956U/en active Pending
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