JPS63123743U - - Google Patents
Info
- Publication number
- JPS63123743U JPS63123743U JP1384587U JP1384587U JPS63123743U JP S63123743 U JPS63123743 U JP S63123743U JP 1384587 U JP1384587 U JP 1384587U JP 1384587 U JP1384587 U JP 1384587U JP S63123743 U JPS63123743 U JP S63123743U
- Authority
- JP
- Japan
- Prior art keywords
- oxygen sensor
- sensor output
- sensor
- oxygen
- heater drive
- 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)
- Measuring Oxygen Concentration In Cells (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は酸素センサの出力とヒータ電圧との間の
関係説明図、第３図Ａおよび第３図Ｂは酸素セン
サの出力補正の説明図、第４図は本考案の別の実
施例を示すブロツク図、第５図は第４図の構成の
制御フローチヤートの一例を示す図、第６図は周
知の酸素センサの概略構成図、第７図および第８
図は第６図の酸素センサの動作説明図、第９図は
酸素センサの出力バラツキの説明図である。
４……ヒータ、１０……酸素センサ、１１……
スイツチング回路、１２……取込判定回路、１３
……比較回路、１４……センサ出力基準値供給回
路、１５……デユーテイ比設定回路、１６……ヒ
ータ駆動信号供給回路、１７……ヒータ駆動回路
、２０……マイクロコンピユータ。
FIG. 1 is a block diagram showing an embodiment of the present invention.
Fig. 2 is an explanatory diagram of the relationship between the output of the oxygen sensor and the heater voltage, Figs. 3A and 3B are explanatory diagrams of the correction of the output of the oxygen sensor, and Fig. 4 is an illustration of another embodiment of the present invention. 5 is a diagram showing an example of a control flowchart for the configuration shown in FIG. 4, FIG. 6 is a schematic diagram of a well-known oxygen sensor, and FIGS.
The figure is an explanatory diagram of the operation of the oxygen sensor shown in FIG. 6, and FIG. 9 is an explanatory diagram of output variation of the oxygen sensor. 4...Heater, 10...Oxygen sensor, 11...
Switching circuit, 12...Intake judgment circuit, 13
... Comparison circuit, 14 ... Sensor output reference value supply circuit, 15 ... Duty ratio setting circuit, 16 ... Heater drive signal supply circuit, 17 ... Heater drive circuit, 20 ... Microcomputer.
Claims (1)
の出力を補正するための装置であつて、前記酸素
センサを加熱するヒータへの通電をヒータ駆動信
号に従つてオン／オフするヒータ駆動回路と、少
なくともエンジンがフユーエルカツトの状態にあ
るときに前記酸素センサのセンサ出力信号を取り
込む取込手段と、取り込まれたセンサ出力信号を
大気中の酸素濃度に基づいて設定されたセンサ出
力基準値と比較する比較手段と、当該比較手段の
比較結果に基づいて、フユーエルカツト中の前記
酸素センサのセンサ出力信号が前記センサ出力基
準値に一致するように、前記ヒータ駆動信号のデ
ユーテイ比を設定制御する手段とを有することを
特徴とする酸素センサの出力補正装置。 A device for correcting the output of an oxygen sensor based on the temperature dependence of the oxygen sensor, the device comprising: a heater drive circuit that turns on/off energization to a heater that heats the oxygen sensor according to a heater drive signal; A capture means for capturing a sensor output signal of the oxygen sensor when the engine is in a fuel cut state, and a comparison means for comparing the captured sensor output signal with a sensor output reference value set based on the oxygen concentration in the atmosphere. and means for setting and controlling the duty ratio of the heater drive signal so that the sensor output signal of the oxygen sensor during fuel cut matches the sensor output reference value based on the comparison result of the comparison means. An oxygen sensor output correction device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1384587U JPS63123743U (en) | 1987-02-03 | 1987-02-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1384587U JPS63123743U (en) | 1987-02-03 | 1987-02-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63123743U true JPS63123743U (en) | 1988-08-11 |
Family
ID=30803286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1384587U Pending JPS63123743U (en) | 1987-02-03 | 1987-02-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63123743U (en) |
-
1987
- 1987-02-03 JP JP1384587U patent/JPS63123743U/ja active Pending