JPS56159549A - Air to fuel ratio control system for engine - Google Patents
Air to fuel ratio control system for engineInfo
- Publication number
- JPS56159549A JPS56159549A JP6353880A JP6353880A JPS56159549A JP S56159549 A JPS56159549 A JP S56159549A JP 6353880 A JP6353880 A JP 6353880A JP 6353880 A JP6353880 A JP 6353880A JP S56159549 A JPS56159549 A JP S56159549A
- 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 a low load operation of the engine while the air to fuel ratio is suddenly reduced and thereafter it is brought close to the logical air to fuel ratio when the low load operation is shifted to a feedback control operation again.
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 low load operation time is shifted to the normal feedback operation time, the computer reduces the air to fuel ratio suddenly and thereafter brings it close to the logical air to fuel ratio value gradually.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6353880A JPS56159549A (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 |
---|---|---|---|
JP6353880A JPS56159549A (en) | 1980-05-13 | 1980-05-13 | Air to fuel ratio control system for engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56159549A true JPS56159549A (en) | 1981-12-08 |
JPS6147303B2 JPS6147303B2 (en) | 1986-10-18 |
Family
ID=13232086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6353880A Granted JPS56159549A (en) | 1980-05-13 | 1980-05-13 | Air to fuel ratio control system for engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56159549A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS597251U (en) * | 1982-07-07 | 1984-01-18 | トヨタ自動車株式会社 | Internal combustion engine exhaust gas purification device |
JPS5987246A (en) * | 1982-11-11 | 1984-05-19 | Nissan Motor Co Ltd | Air-fuel ratio controller |
JPS59224451A (en) * | 1983-06-01 | 1984-12-17 | Daihatsu Motor Co Ltd | Air fuel ratio control system for carburetor |
JPS61232340A (en) * | 1985-04-05 | 1986-10-16 | Mazda Motor Corp | Air-fuel ratio controller for engine |
JPS62167846U (en) * | 1986-04-12 | 1987-10-24 | ||
JPS6312850A (en) * | 1986-07-01 | 1988-01-20 | Nissan Motor Co Ltd | Air-fuel ratio controller for internal combustion engine |
-
1980
- 1980-05-13 JP JP6353880A patent/JPS56159549A/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS597251U (en) * | 1982-07-07 | 1984-01-18 | トヨタ自動車株式会社 | Internal combustion engine exhaust gas purification device |
JPS5987246A (en) * | 1982-11-11 | 1984-05-19 | Nissan Motor Co Ltd | Air-fuel ratio controller |
JPS59224451A (en) * | 1983-06-01 | 1984-12-17 | Daihatsu Motor Co Ltd | Air fuel ratio control system for carburetor |
JPS61232340A (en) * | 1985-04-05 | 1986-10-16 | Mazda Motor Corp | Air-fuel ratio controller for engine |
JPH03488B2 (en) * | 1985-04-05 | 1991-01-08 | Mazda Motor | |
JPS62167846U (en) * | 1986-04-12 | 1987-10-24 | ||
JPS6312850A (en) * | 1986-07-01 | 1988-01-20 | Nissan Motor Co Ltd | Air-fuel ratio controller for internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
JPS6147303B2 (en) | 1986-10-18 |
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