JPS57200642A - Air-fuel ratio control device for internal-combustion engine - Google Patents

Air-fuel ratio control device for internal-combustion engine

Info

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
Application number
JP8549381A
Other languages
Japanese (ja)
Inventor
Ryosuke Jo
Hideo Ooyama
Shunichi Ando
Takeshi Matsui
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
NipponDenso Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP8549381A priority Critical patent/JPS57200642A/en
Publication of JPS57200642A publication Critical patent/JPS57200642A/en
Pending legal-status Critical Current

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.
JP8549381A 1981-06-03 1981-06-03 Air-fuel ratio control device for internal-combustion engine Pending JPS57200642A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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