JPS6436941A - Control device for air-fuel ratio of engine - Google Patents
Control device for air-fuel ratio of engineInfo
- Publication number
- JPS6436941A JPS6436941A JP19312287A JP19312287A JPS6436941A JP S6436941 A JPS6436941 A JP S6436941A JP 19312287 A JP19312287 A JP 19312287A JP 19312287 A JP19312287 A JP 19312287A JP S6436941 A JPS6436941 A JP S6436941A
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- sensor
- shift position
- feedback control
- 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 oscillation and surging caused by resonance in the whole shift position by varying a controlling constant so that the varying frequency of air-fuel ratio in an air-fuel ratio feedback control using an O2 sensor may not agree with a natural frequency in a gear shift position. CONSTITUTION:The outputs of an air flow meter 13, a throttle valve opening sensor 29, an engine speed sensor, an O2 sensor 27, an intake air pressure sensor 31, the shift position of a transmission, etc. are inputted into a control circuit 19, which operates and controls the valve opening time of a fuel injection valve 17. The control circuit 19 judges whether in the zone of carrying out an air-fuel ratio feedback control by means of an O2 sensor or not in accordance with an engine speed and an engine load. And, it varies the controlling constant of an integral part and proportional part, etc. so that the varying frequency of air-fuel ratio in air-fuel ratio feedback control may not agree with a natural frequency in the shift position of a transmission.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19312287A JPS6436941A (en) | 1987-07-31 | 1987-07-31 | Control device for air-fuel ratio of engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19312287A JPS6436941A (en) | 1987-07-31 | 1987-07-31 | Control device for air-fuel ratio of engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6436941A true JPS6436941A (en) | 1989-02-07 |
Family
ID=16302625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19312287A Pending JPS6436941A (en) | 1987-07-31 | 1987-07-31 | Control device for air-fuel ratio of engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6436941A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5970966A (en) * | 1996-12-04 | 1999-10-26 | Nissan Motor Co., Ltd. | Engine air-fuel ratio controller |
-
1987
- 1987-07-31 JP JP19312287A patent/JPS6436941A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5970966A (en) * | 1996-12-04 | 1999-10-26 | Nissan Motor Co., Ltd. | Engine air-fuel ratio controller |
DE19753814C2 (en) * | 1996-12-04 | 2000-04-27 | Nissan Motor | Control device for the air-fuel ratio of an engine |
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