JPS5629154A - Control unit for air fuel ratio - Google Patents
Control unit for air fuel ratioInfo
- Publication number
- JPS5629154A JPS5629154A JP10501279A JP10501279A JPS5629154A JP S5629154 A JPS5629154 A JP S5629154A JP 10501279 A JP10501279 A JP 10501279A JP 10501279 A JP10501279 A JP 10501279A JP S5629154 A JPS5629154 A JP S5629154A
- Authority
- JP
- Japan
- Prior art keywords
- value
- control
- switching
- stability
- taking
- 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
- Measuring Oxygen Concentration In Cells (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
PURPOSE: To simplify the control and to increase the stability at control switching, by stopping the closed loop control when the maximum value of output voltage of exhaust sensor due to current flowing is less than the specified value.
CONSTITUTION: The constant voltage Vc is divided with resistances R1 and R2, and fed to the exhaust sensor 15 represented in the internal resistance R3 and electromotive force V2, and appearent output voltage V0 is obtained from the terminal 18. In this case, taking the leakage current of the operational amplifier A1 as IA, the voltage V0 is V0=R0V2/(R0+R3)+R3V1/(R0+R3)+R0R3IA/ (R0+R3). Taking VR and VL as the value of V0 at the over concentrated and dilute states of mixed gas, as the resistance R3 approaches the infinite with the temperature decrease, the value of V0 converges to V1, and VR is greater and VL is smaller with temperature rise. Accordingly, by deciding the value of VR, VSH corresponding to the temperature when the closed loop control is switched into open control, and by switching when the maximum value VR of V0 is less than VSH, the stability at switching can be made with a simple operation.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10501279A JPS5629154A (en) | 1979-08-20 | 1979-08-20 | Control unit for air fuel ratio |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10501279A JPS5629154A (en) | 1979-08-20 | 1979-08-20 | Control unit for air fuel ratio |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5629154A true JPS5629154A (en) | 1981-03-23 |
Family
ID=14396149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10501279A Pending JPS5629154A (en) | 1979-08-20 | 1979-08-20 | Control unit for air fuel ratio |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5629154A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59126048A (en) * | 1982-12-29 | 1984-07-20 | Toyota Motor Corp | Air-fuel ratio controlling method for internal- combustion engine for vehicle |
JPS617695U (en) * | 1984-06-20 | 1986-01-17 | 本田技研工業株式会社 | Joint device in mold |
-
1979
- 1979-08-20 JP JP10501279A patent/JPS5629154A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59126048A (en) * | 1982-12-29 | 1984-07-20 | Toyota Motor Corp | Air-fuel ratio controlling method for internal- combustion engine for vehicle |
JPH0429856B2 (en) * | 1982-12-29 | 1992-05-20 | ||
JPS617695U (en) * | 1984-06-20 | 1986-01-17 | 本田技研工業株式会社 | Joint device in mold |
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