JPS54142419A - Air-fuel-ratio control method - Google Patents
Air-fuel-ratio control methodInfo
- Publication number
- JPS54142419A JPS54142419A JP4992778A JP4992778A JPS54142419A JP S54142419 A JPS54142419 A JP S54142419A JP 4992778 A JP4992778 A JP 4992778A JP 4992778 A JP4992778 A JP 4992778A JP S54142419 A JPS54142419 A JP S54142419A
- Authority
- JP
- Japan
- Prior art keywords
- output
- fuel
- period
- sensor
- average
- 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 save fuel and purify exhaust gas by supplying air-fuel-mixture at a proper air-fuel-ratio determined by comparison of an O2 sensor output with a reference voltage level the average of the maximum and minimum output of the O2 sensor.
CONSTITUTION: As a reference level b' is the average value Vm of the maximum and minimum output from an O2 sensor, an on period and off period are equal in a square wave of the output c' from a comparator 7 and a charge period and discharge period of the output d' from a proportion integrator 8 are equal so that an average voltage may be kept constant. The reference level b' the average value Vm meets with three original points. When a comparator 9 compares the outpyt d' from the proportion integrator 8 with the output e' from a delta wave oscillator 10, the output d' is pulled back to the three original point. An average voltage 4 of the output e' from the delta wave oscillator 10 is corrected by a difference between Vm and V. The resulting output f runs an actuator 6 to offer proper air-fuel-ratio.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4992778A JPS54142419A (en) | 1978-04-28 | 1978-04-28 | Air-fuel-ratio control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4992778A JPS54142419A (en) | 1978-04-28 | 1978-04-28 | Air-fuel-ratio control method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54142419A true JPS54142419A (en) | 1979-11-06 |
Family
ID=12844641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4992778A Pending JPS54142419A (en) | 1978-04-28 | 1978-04-28 | Air-fuel-ratio control method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54142419A (en) |
-
1978
- 1978-04-28 JP JP4992778A patent/JPS54142419A/en active Pending
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