JPS6453039A - Air-fuel ratio controller for internal combustion engine - Google Patents
Air-fuel ratio controller for internal combustion engineInfo
- Publication number
- JPS6453039A JPS6453039A JP20450287A JP20450287A JPS6453039A JP S6453039 A JPS6453039 A JP S6453039A JP 20450287 A JP20450287 A JP 20450287A JP 20450287 A JP20450287 A JP 20450287A JP S6453039 A JPS6453039 A JP S6453039A
- Authority
- JP
- Japan
- Prior art keywords
- fuel ratio
- sensor
- air
- lean
- oxygen sensor
- 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 prevent a miscompensation due to a secular change in an oxygen sensor form occurring by varying a mean air-fuel ratio to rich or lean by degrees, and when an output variation in the oxygen sensor exceeds the specified value, making it so as to be restored to the lean or rich side. CONSTITUTION:Each detected value of an air flow sensor 11, an intake air temperature sensor 12, an atmospheric pressure sensor 13, a throttle sensor 14, an idle switch 15, an oxygen sensor 18 at the downstream of catalytic converter 9, a water temperature sensor 19, etc., is inputted into an electronic control unit ECU, and this control unit operates and controls valve opening time of a fuel injection valve 8. In addition, the ECU varies a mean air-fuel ratio to the lean side from the rich side by degrees, and when an output variation out of the detected value of the oxygen sensor 18 exceeds the specified value, it varies the mean air-fuel ratio to the rich side.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20450287A JPS6453039A (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 |
---|---|---|---|
JP20450287A JPS6453039A (en) | 1987-08-18 | 1987-08-18 | Air-fuel ratio controller for internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6453039A true JPS6453039A (en) | 1989-03-01 |
Family
ID=16491590
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20450287A Pending JPS6453039A (en) | 1987-08-18 | 1987-08-18 | Air-fuel ratio controller for internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6453039A (en) |
-
1987
- 1987-08-18 JP JP20450287A patent/JPS6453039A/en active Pending
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