JPS56146034A - Air-fuel ratio controlling device - Google Patents
Air-fuel ratio controlling deviceInfo
- Publication number
- JPS56146034A JPS56146034A JP4819580A JP4819580A JPS56146034A JP S56146034 A JPS56146034 A JP S56146034A JP 4819580 A JP4819580 A JP 4819580A JP 4819580 A JP4819580 A JP 4819580A JP S56146034 A JPS56146034 A JP S56146034A
- Authority
- JP
- Japan
- Prior art keywords
- output
- comparator
- sensor
- fuel ratio
- air
- 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
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
PURPOSE: To enable accurate control of the air-fuel ratio even at the time when an exhaust gas sensor is inactive by setting the comparison output of a comparator at a prescribed condition when a power source is charged in the device wherein the air- fuel ratio is subjected to feedback control in accordance with the output of the sensor.
CONSTITUTION: When the power source is charged on the start of operation of an engine, the output of the comparator 12 reaches a high level since the detection signal of the exhaust gas sensor 1 is at a low level before the operation of the engine and since a transistor 9 is turned on only for a prescribed time (about 0.5sec) set by a timer circuit composed of resistors 7, 8 and a capacitor 10 to impress the voltage of the power source on the side of noninverting input of the comparator 12. Accordingly, the actuator of an adjusting device 14 is turned on and set in the state of initial setting. When the engine is started at this time, the output of the sensor 1 found in a half-active condition at the initial stage of the starting is amplified 2 and inputted in an AC connection capacitor 3, and the fluctuating part of the output of the sensor 1 is taken out and inputted in the comparator 12.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4819580A JPS56146034A (en) | 1980-04-11 | 1980-04-11 | Air-fuel ratio controlling device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4819580A JPS56146034A (en) | 1980-04-11 | 1980-04-11 | Air-fuel ratio controlling device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56146034A true JPS56146034A (en) | 1981-11-13 |
JPS6213501B2 JPS6213501B2 (en) | 1987-03-26 |
Family
ID=12796596
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4819580A Granted JPS56146034A (en) | 1980-04-11 | 1980-04-11 | Air-fuel ratio controlling device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56146034A (en) |
-
1980
- 1980-04-11 JP JP4819580A patent/JPS56146034A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6213501B2 (en) | 1987-03-26 |
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