JPS57165645A - Control method of air-fuel ratio - Google Patents

Control method of air-fuel ratio

Info

Publication number
JPS57165645A
JPS57165645A JP5205681A JP5205681A JPS57165645A JP S57165645 A JPS57165645 A JP S57165645A JP 5205681 A JP5205681 A JP 5205681A JP 5205681 A JP5205681 A JP 5205681A JP S57165645 A JPS57165645 A JP S57165645A
Authority
JP
Japan
Prior art keywords
correction
fuel ratio
fuel
air
coefficients
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.)
Granted
Application number
JP5205681A
Other languages
Japanese (ja)
Other versions
JPS6345500B2 (en
Inventor
Masumi Kinugawa
Tomihide Suzuki
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 JP5205681A priority Critical patent/JPS57165645A/en
Publication of JPS57165645A publication Critical patent/JPS57165645A/en
Publication of JPS6345500B2 publication Critical patent/JPS6345500B2/ja
Granted 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/263—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the program execution being modifiable by physical parameters

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (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 adequately perform correction also in a range of acceleration and deceleration incapable of learning, in air-fuel control of a mixture through an fir-fuel ratio sensor, by calculating a feed amount of fuel from the latest correction value of an engine condition stored in a memory unit. CONSTITUTION:For operating conditions of an engine, idle, steady running normal load and steady running high load, an integration correction value of air- fuel ratio sensor output is compared with a prescribed value, and coefficients K1-K3, adjusted from a reference value, are multiplied to a basic fuel injection amount to calculate a fuel injection amount. Further in case of storing the coefficients K1-K3, learning control of each factor, causing an error for target air- fuel ratio, is performed, and correction is perfrmed by the latest correction coefficients K1-K3 in all ranges of operation including transient time. For instance, at idle operation, a correction amount is calculated by the latest K1 and K3 stored except K2. Accordingly, correction control can be performed without delay of a response even for change of an operational condition.
JP5205681A 1981-04-07 1981-04-07 Control method of air-fuel ratio Granted JPS57165645A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5205681A JPS57165645A (en) 1981-04-07 1981-04-07 Control method of air-fuel ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5205681A JPS57165645A (en) 1981-04-07 1981-04-07 Control method of air-fuel ratio

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP13711887A Division JPS631742A (en) 1987-05-29 1987-05-29 Air-fuel ratio control method

Publications (2)

Publication Number Publication Date
JPS57165645A true JPS57165645A (en) 1982-10-12
JPS6345500B2 JPS6345500B2 (en) 1988-09-09

Family

ID=12904145

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5205681A Granted JPS57165645A (en) 1981-04-07 1981-04-07 Control method of air-fuel ratio

Country Status (1)

Country Link
JP (1) JPS57165645A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5910764A (en) * 1982-07-12 1984-01-20 Toyota Motor Corp Control method of air-fuel ratio in internal-combustion engine
JPS60108536A (en) * 1983-11-12 1985-06-14 ローベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Fuel supply amount controller of internal combustion engine
JPH01106937A (en) * 1987-10-20 1989-04-24 Japan Electron Control Syst Co Ltd Control device for learning of internal combustion engine
JPH01106938A (en) * 1987-10-20 1989-04-24 Japan Electron Control Syst Co Ltd Control device for learning of internal combustion engine
JPH0354339A (en) * 1989-07-21 1991-03-08 Toyota Motor Corp Air-fuel ratio feedback control method for lpg engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5910764A (en) * 1982-07-12 1984-01-20 Toyota Motor Corp Control method of air-fuel ratio in internal-combustion engine
JPS60108536A (en) * 1983-11-12 1985-06-14 ローベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Fuel supply amount controller of internal combustion engine
JPH01106937A (en) * 1987-10-20 1989-04-24 Japan Electron Control Syst Co Ltd Control device for learning of internal combustion engine
JPH01106938A (en) * 1987-10-20 1989-04-24 Japan Electron Control Syst Co Ltd Control device for learning of internal combustion engine
JPH0354339A (en) * 1989-07-21 1991-03-08 Toyota Motor Corp Air-fuel ratio feedback control method for lpg engine

Also Published As

Publication number Publication date
JPS6345500B2 (en) 1988-09-09

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