JPS5656933A - Air-fuel ratio controlling apparatus for internal combustion engine - Google Patents
Air-fuel ratio controlling apparatus for internal combustion engineInfo
- Publication number
- JPS5656933A JPS5656933A JP13290779A JP13290779A JPS5656933A JP S5656933 A JPS5656933 A JP S5656933A JP 13290779 A JP13290779 A JP 13290779A JP 13290779 A JP13290779 A JP 13290779A JP S5656933 A JPS5656933 A JP S5656933A
- Authority
- JP
- Japan
- Prior art keywords
- integrator
- comparator
- fuel ratio
- air
- reference voltage
- 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 keep an appropriate air-fuel ratio independently of the composition of fuel and to thereby prevent degradation in the exhaust-gas purifying performance of an engine, by providing a control means for changing the reference voltage of a comparator in response to a predetermined value of the output voltage of an integrator.
CONSTITUTION: When the output voltage of an integrator 18 is lowr than a reference voltage Va, the output of a comparator 25 is kept at zero, so that a reference voltage Vb1 is applied from a reference power source 28 to an inverted terminal of a comparator 17 via a switching element 27. Since pulses from an air-fuel ratio sensor 11 are thus compared with a lower reference voltage Vb1, the rising time of output pulses of comparator 17 is determined relatively promptly at the inclined side along which rises the pulses from sensor 11 and the end of the rising period of the output voltage of integrator 18 is also determined relatively promptly. Therefore, it is enabled to prevent rising of the output voltage of integrator 18.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13290779A JPS5656933A (en) | 1979-10-17 | 1979-10-17 | Air-fuel ratio controlling apparatus for internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13290779A JPS5656933A (en) | 1979-10-17 | 1979-10-17 | Air-fuel ratio controlling apparatus for internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5656933A true JPS5656933A (en) | 1981-05-19 |
JPS6257814B2 JPS6257814B2 (en) | 1987-12-02 |
Family
ID=15092311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13290779A Granted JPS5656933A (en) | 1979-10-17 | 1979-10-17 | Air-fuel ratio controlling apparatus for internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5656933A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54132021A (en) * | 1978-04-03 | 1979-10-13 | Nippon Denso Co Ltd | Air-fuel-ratio controller |
-
1979
- 1979-10-17 JP JP13290779A patent/JPS5656933A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54132021A (en) * | 1978-04-03 | 1979-10-13 | Nippon Denso Co Ltd | Air-fuel-ratio controller |
Also Published As
Publication number | Publication date |
---|---|
JPS6257814B2 (en) | 1987-12-02 |
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