JPS57203842A - Air-fuel control device for internal-combustion engine - Google Patents

Air-fuel control device for internal-combustion engine

Info

Publication number
JPS57203842A
JPS57203842A JP8983581A JP8983581A JPS57203842A JP S57203842 A JPS57203842 A JP S57203842A JP 8983581 A JP8983581 A JP 8983581A JP 8983581 A JP8983581 A JP 8983581A JP S57203842 A JPS57203842 A JP S57203842A
Authority
JP
Japan
Prior art keywords
engine
air
revolution number
fuel ratio
counter
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
JP8983581A
Other languages
Japanese (ja)
Inventor
Yuji Kishimoto
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8983581A priority Critical patent/JPS57203842A/en
Publication of JPS57203842A publication Critical patent/JPS57203842A/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)
    • F02D41/1482—Integrator, i.e. variable slope

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 decrease the amplitude of air-fuel ratio in any operating condition of the engine by a method wherein an I gain in a PI control is increased or decreased depending on the revolution number of the engine in the system controlling the air-fuel ratio by feedback effected by the PI control. CONSTITUTION:When an O2 sensor 1, provided in an exhaust gas system, has decided rich or lean during the operation of the engine, the output signal thereof is amplified at an amplifier 2, thereafter, is supplied to an up-down counter 3 to cause therein a down or an up count operation. On the other hand, the output signl of a revolution number sensor 4 is supplied to the clock terminal of the counter 3 through a wave-form shaper 5, however, the frequency of this signal is varied in proportion to the revolution number of the engine, therefore, the count value of said counter 3 is changed in the changing speed thereof in accordance with the revolution number of the engine. The expected purpose may be achieved by utilizing this count value as the I gain for the PI control of the air-fuel ratio.
JP8983581A 1981-06-10 1981-06-10 Air-fuel control device for internal-combustion engine Pending JPS57203842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8983581A JPS57203842A (en) 1981-06-10 1981-06-10 Air-fuel control device for internal-combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8983581A JPS57203842A (en) 1981-06-10 1981-06-10 Air-fuel control device for internal-combustion engine

Publications (1)

Publication Number Publication Date
JPS57203842A true JPS57203842A (en) 1982-12-14

Family

ID=13981816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8983581A Pending JPS57203842A (en) 1981-06-10 1981-06-10 Air-fuel control device for internal-combustion engine

Country Status (1)

Country Link
JP (1) JPS57203842A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6040748A (en) * 1983-08-12 1985-03-04 Mazda Motor Corp Fuel supply device in engine
JPS61201840A (en) * 1985-03-06 1986-09-06 Hitachi Ltd Engine control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6040748A (en) * 1983-08-12 1985-03-04 Mazda Motor Corp Fuel supply device in engine
JPS61201840A (en) * 1985-03-06 1986-09-06 Hitachi Ltd Engine control device

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