JPS555440A - Air-fuel ratio controller - Google Patents
Air-fuel ratio controllerInfo
- Publication number
- JPS555440A JPS555440A JP7677878A JP7677878A JPS555440A JP S555440 A JPS555440 A JP S555440A JP 7677878 A JP7677878 A JP 7677878A JP 7677878 A JP7677878 A JP 7677878A JP S555440 A JPS555440 A JP S555440A
- Authority
- JP
- Japan
- Prior art keywords
- fuel ratio
- air
- response
- temperature
- exhaust gas
- 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 accurately control the air-fuel ratio in the theoretical air-fuel ratio, by changing the delay time of a delay circuit mounted in order to respond the difference of the response time of an air-fuel ratio sensor in response to the temperature of exhaust gas.
CONSTITUTION: An air-fuel ratio control unit 30 consists of each circuit of a comparison 40, a delay 50 and an integration 60. The rise of electromotive force is steep or gentle in response to the high or low temperature of exhaust gas in a sensor 20 for obtaining the air-fuel ratio from exhaust gas. The signals of the sensor 20 are compared with theoretical air-fuel ratio voltage Vs by means of a comparator 44, and 1 or O output signals are emitted in response to the concentration of the fuel of mixture. Since a condenser 51 of the delay circuit 50 alters discharge time in response to electric resistance value depending upon the temperature of an exhaust temperature sensor 21, the rise of voltage Vc becomes easy when the temperature of exhaust gas is low, the 1 level output time of a comparator 54 is prolonged, and a fuel feeder 12 is controlled, thus maintaining the theoretical air-fuel ratio.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7677878A JPS555440A (en) | 1978-06-23 | 1978-06-23 | Air-fuel ratio controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7677878A JPS555440A (en) | 1978-06-23 | 1978-06-23 | Air-fuel ratio controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS555440A true JPS555440A (en) | 1980-01-16 |
Family
ID=13615047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7677878A Pending JPS555440A (en) | 1978-06-23 | 1978-06-23 | Air-fuel ratio controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS555440A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51143134A (en) * | 1975-06-05 | 1976-12-09 | Nippon Denso Co Ltd | Fuel ratio feed back fuel injection controller |
JPS5281435A (en) * | 1975-12-27 | 1977-07-07 | Nissan Motor Co Ltd | Air fuel ratio controller |
-
1978
- 1978-06-23 JP JP7677878A patent/JPS555440A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51143134A (en) * | 1975-06-05 | 1976-12-09 | Nippon Denso Co Ltd | Fuel ratio feed back fuel injection controller |
JPS5281435A (en) * | 1975-12-27 | 1977-07-07 | Nissan Motor Co Ltd | Air fuel ratio controller |
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