JPS56159550A - Air to fuel ratio control system for engine - Google Patents
Air to fuel ratio control system for engineInfo
- Publication number
- JPS56159550A JPS56159550A JP6353980A JP6353980A JPS56159550A JP S56159550 A JPS56159550 A JP S56159550A JP 6353980 A JP6353980 A JP 6353980A JP 6353980 A JP6353980 A JP 6353980A JP S56159550 A JPS56159550 A JP S56159550A
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- low load
- load operation
- computer
- 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 improve transitional operation properties by a method wherein feedback control is stopped and a poor mixture is supplied during the low load operation of the engine while the air to fuel ratio is increased gradually to a predetermined amount at first and thereafter is brought close to the predetermined air to fuel ratio rapidly when the operation is shifted to the low load operation.
CONSTITUTION: Air bleed conduits 16, 30 are connected to a main fuel nozzle 10 provided in a small venturi 9 and a slow port 25 provided at the vicinity of a throttle valve 7 respectively. Proportional actuators 17, 31 are connected to the conduits 16, 30 respectively and the air to fuel ratio is controlled by controlling these actuators with a computer 24 in accordance with the output of an exhaust sensor 40. Here, the computer 24 opens respective actuators 17, 31 to increase the amount of the bleed when the low load operation time excluding an idling time is detected by the outputs of negative pressure switches 62, 66 and an idling switch 65, on the other hand, when the operation is shifted to the low load operation time, the computer increases the air to fuel ratio gradually under the predertermined amount at first and thereafter energizes it rapidly to bring it close to the predetermined air to fuel ratio value.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6353980A JPS56159550A (en) | 1980-05-13 | 1980-05-13 | Air to fuel ratio control system for engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6353980A JPS56159550A (en) | 1980-05-13 | 1980-05-13 | Air to fuel ratio control system for engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56159550A true JPS56159550A (en) | 1981-12-08 |
JPS638308B2 JPS638308B2 (en) | 1988-02-22 |
Family
ID=13232118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6353980A Granted JPS56159550A (en) | 1980-05-13 | 1980-05-13 | Air to fuel ratio control system for engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56159550A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58211544A (en) * | 1982-06-03 | 1983-12-09 | Toyota Motor Corp | Control method of air-fuel ratio of internal- combustion engine |
JPS59192852A (en) * | 1983-04-15 | 1984-11-01 | Mitsubishi Electric Corp | Air-fuel ratio controlling apparatus |
JPS6267252A (en) * | 1985-09-19 | 1987-03-26 | Honda Motor Co Ltd | Air-fuel ratio controlling method in internal combustion engine for vehicles |
-
1980
- 1980-05-13 JP JP6353980A patent/JPS56159550A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58211544A (en) * | 1982-06-03 | 1983-12-09 | Toyota Motor Corp | Control method of air-fuel ratio of internal- combustion engine |
JPH0472057B2 (en) * | 1982-06-03 | 1992-11-17 | Toyota Motor Co Ltd | |
JPS59192852A (en) * | 1983-04-15 | 1984-11-01 | Mitsubishi Electric Corp | Air-fuel ratio controlling apparatus |
JPS6267252A (en) * | 1985-09-19 | 1987-03-26 | Honda Motor Co Ltd | Air-fuel ratio controlling method in internal combustion engine for vehicles |
Also Published As
Publication number | Publication date |
---|---|
JPS638308B2 (en) | 1988-02-22 |
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