JPS56143325A - Method and apparatus for controlling air fuel ratio - Google Patents
Method and apparatus for controlling air fuel ratioInfo
- Publication number
- JPS56143325A JPS56143325A JP4513280A JP4513280A JPS56143325A JP S56143325 A JPS56143325 A JP S56143325A JP 4513280 A JP4513280 A JP 4513280A JP 4513280 A JP4513280 A JP 4513280A JP S56143325 A JPS56143325 A JP S56143325A
- Authority
- JP
- Japan
- Prior art keywords
- output
- circuit
- fuel ratio
- idling condition
- 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
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
PURPOSE: To prevent variation of air fuel ratio in an internal combustion engine provided with three dimensional catalyst in its exhaust system, by using when idle conditions is detected, an averaged value of feedback control amount within a predetermined time after setting of the idling condition, as a fixed control amount from that time on.
CONSTITUTION: The output of an O2 sensor 1 is applied as the input to an integrating circuit 5 after rich or lean status of fuel is determined by a judging circuit 4. The output VF of the integrating circuit 5 is applied to an actuator 12 through a switch 81 and output circuit 11 in order to adjust fuel amount or air amount for correcting air fuel ratio. Also, the output VF is connected to said output circuit 11 through switches 82, 83 and an integrating circuit 10, while idling condition is detected by an idling detecting circuit 6 through signals from a number of revolutional sensor 2 and negative pressure sensor 3. When the idling condition is detected, the switch 82 is closed. When a predetermined time has elapsed after the detection of the idling condition, the switches 81, 82 are opened and the switch 83 is closed to apply the output V1 of the integrator 10 to the output circuit 11.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4513280A JPS56143325A (en) | 1980-04-08 | 1980-04-08 | Method and apparatus for controlling air fuel ratio |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4513280A JPS56143325A (en) | 1980-04-08 | 1980-04-08 | Method and apparatus for controlling air fuel ratio |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56143325A true JPS56143325A (en) | 1981-11-09 |
JPS638294B2 JPS638294B2 (en) | 1988-02-22 |
Family
ID=12710741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4513280A Granted JPS56143325A (en) | 1980-04-08 | 1980-04-08 | Method and apparatus for controlling air fuel ratio |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56143325A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58174141A (en) * | 1982-04-06 | 1983-10-13 | Mitsubishi Electric Corp | Air fuel ratio controller |
JPS59224451A (en) * | 1983-06-01 | 1984-12-17 | Daihatsu Motor Co Ltd | Air fuel ratio control system for carburetor |
JPS61201840A (en) * | 1985-03-06 | 1986-09-06 | Hitachi Ltd | Engine control device |
JPS6267253A (en) * | 1985-09-19 | 1987-03-26 | Honda Motor Co Ltd | Air-fuel ratio controlling method in internal combustion engine for vehicles |
JPS6444339U (en) * | 1987-09-10 | 1989-03-16 | ||
US5065727A (en) * | 1989-04-28 | 1991-11-19 | Nissan Motor Company, Limited | Air/fuel ratio control system for internal combustion engine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51149420A (en) * | 1975-06-18 | 1976-12-22 | Nissan Motor Co Ltd | Air-fuel rati o control device |
JPS53118919U (en) * | 1977-03-01 | 1978-09-21 |
-
1980
- 1980-04-08 JP JP4513280A patent/JPS56143325A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51149420A (en) * | 1975-06-18 | 1976-12-22 | Nissan Motor Co Ltd | Air-fuel rati o control device |
JPS53118919U (en) * | 1977-03-01 | 1978-09-21 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58174141A (en) * | 1982-04-06 | 1983-10-13 | Mitsubishi Electric Corp | Air fuel ratio controller |
JPS59224451A (en) * | 1983-06-01 | 1984-12-17 | Daihatsu Motor Co Ltd | Air fuel ratio control system for carburetor |
JPS61201840A (en) * | 1985-03-06 | 1986-09-06 | Hitachi Ltd | Engine control device |
JPS6267253A (en) * | 1985-09-19 | 1987-03-26 | Honda Motor Co Ltd | Air-fuel ratio controlling method in internal combustion engine for vehicles |
JPS6444339U (en) * | 1987-09-10 | 1989-03-16 | ||
US5065727A (en) * | 1989-04-28 | 1991-11-19 | Nissan Motor Company, Limited | Air/fuel ratio control system for internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
JPS638294B2 (en) | 1988-02-22 |
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