JPS6473146A - Air-fuel ratio control device for internal combustion engine - Google Patents
Air-fuel ratio control device for internal combustion engineInfo
- Publication number
- JPS6473146A JPS6473146A JP22660787A JP22660787A JPS6473146A JP S6473146 A JPS6473146 A JP S6473146A JP 22660787 A JP22660787 A JP 22660787A JP 22660787 A JP22660787 A JP 22660787A JP S6473146 A JPS6473146 A JP S6473146A
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- sensor
- target
- detected
- 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.)
- Granted
Links
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
PURPOSE:To improve convergence to a target airfuel ratio, by a method wherein, by means of a deviation from a target value of an air-fuel ratio detected bp an O2 sensor and a differential value, an air-fuel ratio feedback correction factor is set. CONSTITUTION:Detecting values from an airflow meter 13, a crank angle sensor 14, a water temperature sensor 15, and an O2 sensor 16 are inputted to a control unit 12, and an opening time of a fuel injection valve 6 is computed and controlled. The control unit 12 calculates a deviation between an air-fuel ratio detected by the O2 sensor 16 and a target air-fuel ratio responding to the number of revolutions and a fundamental fuel injection amount and a differential value (a change amount per a unit time) of the detected air-fuel ratio, and steppedly converts the calculating results. Based on the stepped value, an air-fuel ratio feedback correction factor is read from a memory map and set.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62226607A JP2510866B2 (en) | 1987-09-11 | 1987-09-11 | Air-fuel ratio control device for internal combustion engine |
US07/236,223 US4926826A (en) | 1987-08-31 | 1988-08-25 | Electric air-fuel ratio control apparatus for use in internal combustion engine |
DE8888114203T DE3875205T2 (en) | 1987-08-31 | 1988-08-31 | ELECTRIC CONTROL OF THE AIR-FUEL RATIO FOR AN INTERNAL COMBUSTION ENGINE. |
EP88114203A EP0305998B1 (en) | 1987-08-31 | 1988-08-31 | Electric air-fuel ratio control apparatus for use in internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62226607A JP2510866B2 (en) | 1987-09-11 | 1987-09-11 | Air-fuel ratio control device for internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6473146A true JPS6473146A (en) | 1989-03-17 |
JP2510866B2 JP2510866B2 (en) | 1996-06-26 |
Family
ID=16847848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62226607A Expired - Lifetime JP2510866B2 (en) | 1987-08-31 | 1987-09-11 | Air-fuel ratio control device for internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2510866B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02188644A (en) * | 1989-01-14 | 1990-07-24 | Nok Corp | Fuel injection controller |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60187723A (en) * | 1984-03-07 | 1985-09-25 | Nissan Motor Co Ltd | Controlling device of air-fuel ratio in internal-conbustion engine |
JPS60216043A (en) * | 1984-04-12 | 1985-10-29 | Nissan Motor Co Ltd | Air-fuel ratio controller |
-
1987
- 1987-09-11 JP JP62226607A patent/JP2510866B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60187723A (en) * | 1984-03-07 | 1985-09-25 | Nissan Motor Co Ltd | Controlling device of air-fuel ratio in internal-conbustion engine |
JPS60216043A (en) * | 1984-04-12 | 1985-10-29 | Nissan Motor Co Ltd | Air-fuel ratio controller |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02188644A (en) * | 1989-01-14 | 1990-07-24 | Nok Corp | Fuel injection controller |
Also Published As
Publication number | Publication date |
---|---|
JP2510866B2 (en) | 1996-06-26 |
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