JPS54129226A - Air-fuel-ratio controller - Google Patents
Air-fuel-ratio controllerInfo
- Publication number
- JPS54129226A JPS54129226A JP3561278A JP3561278A JPS54129226A JP S54129226 A JPS54129226 A JP S54129226A JP 3561278 A JP3561278 A JP 3561278A JP 3561278 A JP3561278 A JP 3561278A JP S54129226 A JPS54129226 A JP S54129226A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- air
- ratio
- circuit
- level
- 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 improve the performance by incorporating a bias current control circuit and an overheat monitor circuit.
CONSTITUTION: A current control circuit 2 which controls bias current supplied for an air-fuel-ratio sensor 1 and an overheat monitor circuit 6 which monitors whether temperature of engine exhaust gas rises over a value to activate or not are incorporated. The resistance of the air-fuel-sensor 1 varying with temperatures can be corrected, which eliminates the need of varying the set level of the comparison circuit 3 according to temperatures. When exhaust gas overheated, the air-fuel-ratio voltage of the air-fuel-ratio sensor 1 is limited under a comparison level of the primary comparator of the overheat monitor circuit 6 higher than a setting level of the comparison circuit 3. Once the level downs under the comparison level of the secondary level, an integration stop circuit 7 operates to stop the integration circuit 4 so that the air-fuel-ratio comparison controller 5 controls the air-fuel-ratio slightly lower than the specified air-fuel-ratio and stops feedback control of air-fuel-ratio. Improper air-fuel-ratio may be therefore prevented.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3561278A JPS54129226A (en) | 1978-03-28 | 1978-03-28 | Air-fuel-ratio controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3561278A JPS54129226A (en) | 1978-03-28 | 1978-03-28 | Air-fuel-ratio controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54129226A true JPS54129226A (en) | 1979-10-06 |
Family
ID=12446657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3561278A Pending JPS54129226A (en) | 1978-03-28 | 1978-03-28 | Air-fuel-ratio controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54129226A (en) |
-
1978
- 1978-03-28 JP JP3561278A patent/JPS54129226A/en active Pending
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