JPS6453041A - Air-fuel ratio controller for internal combustion engine - Google Patents
Air-fuel ratio controller for internal combustion engineInfo
- Publication number
- JPS6453041A JPS6453041A JP20450387A JP20450387A JPS6453041A JP S6453041 A JPS6453041 A JP S6453041A JP 20450387 A JP20450387 A JP 20450387A JP 20450387 A JP20450387 A JP 20450387A JP S6453041 A JPS6453041 A JP S6453041A
- Authority
- JP
- Japan
- Prior art keywords
- value
- oxygen sensor
- air
- sensor
- fuel ratio
- 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
PURPOSE:To compensate a secular change in an oxygen sensor by judging a driving range where output of the oxygen sensor becomes a maximum value and another driving range where it becomes a minimum value, and compensating a reference value in air-fuel ratio feedback control on the basis of the these maximum and minimum values found at both driving ranges. CONSTITUTION:Each detected value of an air flow sensor 11, a crank angle sensor, a throttle sensor 14, an idle switch 15, an oxygen sensor 17, etc., is inputted into an electronic control unit ECU which controls valve opening time of a fuel injection valve 8. When this electronic control unit ECU judges these facts that a fuel-cut area is continued for more than half a second and an area where engine load exceeds the specified value is continued for more than half a second as well, it regards the detected value of the oxygen sensor 17 as becoming the maximum value or the minimum value each, taking in the detected value of the oxygen sensor 17 at both area. On the basis of these two detected values, a reference value in air-fuel ratio feedback control is compensated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20450387A JPS6453041A (en) | 1987-08-18 | 1987-08-18 | Air-fuel ratio controller for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20450387A JPS6453041A (en) | 1987-08-18 | 1987-08-18 | Air-fuel ratio controller for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6453041A true JPS6453041A (en) | 1989-03-01 |
Family
ID=16491608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20450387A Pending JPS6453041A (en) | 1987-08-18 | 1987-08-18 | Air-fuel ratio controller for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6453041A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0326857A (en) * | 1989-06-26 | 1991-02-05 | Nissan Motor Co Ltd | Air-fuel ratio detector for engine |
| JPH0610037U (en) * | 1992-07-16 | 1994-02-08 | 小糸工業株式会社 | Tray retractable seats |
| JP2002145280A (en) * | 2000-11-13 | 2002-05-22 | Toppan Printing Co Ltd | Liquid container |
| KR100435707B1 (en) * | 2002-05-31 | 2004-06-12 | 현대자동차주식회사 | Method of checking rear o2 sensor trouble for vehicles |
-
1987
- 1987-08-18 JP JP20450387A patent/JPS6453041A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0326857A (en) * | 1989-06-26 | 1991-02-05 | Nissan Motor Co Ltd | Air-fuel ratio detector for engine |
| JPH0610037U (en) * | 1992-07-16 | 1994-02-08 | 小糸工業株式会社 | Tray retractable seats |
| JP2002145280A (en) * | 2000-11-13 | 2002-05-22 | Toppan Printing Co Ltd | Liquid container |
| KR100435707B1 (en) * | 2002-05-31 | 2004-06-12 | 현대자동차주식회사 | Method of checking rear o2 sensor trouble for vehicles |
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