JPS57200642A - Air-fuel ratio control device for internal-combustion engine - Google Patents
Air-fuel ratio control device for internal-combustion engineInfo
- Publication number
- JPS57200642A JPS57200642A JP8549381A JP8549381A JPS57200642A JP S57200642 A JPS57200642 A JP S57200642A JP 8549381 A JP8549381 A JP 8549381A JP 8549381 A JP8549381 A JP 8549381A JP S57200642 A JPS57200642 A JP S57200642A
- Authority
- JP
- Japan
- Prior art keywords
- control
- fuel ratio
- air
- open loop
- feedback
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1477—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
- F02D41/1483—Proportional component
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
PURPOSE:To prevent the aggravation of drivability upon an open loop control due to the variability and the deterioration of the characteristics of the air-fuel ratio control system by a method wherein the control signal of the open loop control is corrected by referring to the control signal of a feedback control. CONSTITUTION:D'o, which is an average value (D1+D2)/2 of time rates D1, D2 to control an electromagnetic fuel valve upon stabilized time of the feedback control (standard; 14.7), is memorized into a memory. When the feedback control is transferred to the open loop control upon accelerating or the like and the air- fuel ratio is controlled to a rich side lambdax, the time rate D'x, corrected as a result of an operation D'x=Dx-(Do-D'o), is decided, Here, Dx is a standard objective time rate upon the open loop while (Do-D'o) is a deviation from the standard objective value Do of the time rate upon the feedback. According to this method, the variability and the deterioration of the air-fuel ratio characteristics may be corrected even upon the open loop control and the desired air-fuel ratio lambdax may be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8549381A JPS57200642A (en) | 1981-06-03 | 1981-06-03 | Air-fuel ratio control device for internal-combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8549381A JPS57200642A (en) | 1981-06-03 | 1981-06-03 | Air-fuel ratio control device for internal-combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57200642A true JPS57200642A (en) | 1982-12-08 |
Family
ID=13860456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8549381A Pending JPS57200642A (en) | 1981-06-03 | 1981-06-03 | Air-fuel ratio control device for internal-combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57200642A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5832943A (en) * | 1981-08-19 | 1983-02-26 | Mitsubishi Electric Corp | Air-fuel ratio control method |
JPS5941643A (en) * | 1982-09-02 | 1984-03-07 | Japan Electronic Control Syst Co Ltd | Electronically-controlled fuel injector for internal- combustion engine |
-
1981
- 1981-06-03 JP JP8549381A patent/JPS57200642A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5832943A (en) * | 1981-08-19 | 1983-02-26 | Mitsubishi Electric Corp | Air-fuel ratio control method |
JPS5941643A (en) * | 1982-09-02 | 1984-03-07 | Japan Electronic Control Syst Co Ltd | Electronically-controlled fuel injector for internal- combustion engine |
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