JPS5853659A - Method of controlling air-fuel ratio in internal- combustion engine - Google Patents

Method of controlling air-fuel ratio in internal- combustion engine

Info

Publication number
JPS5853659A
JPS5853659A JP15204681A JP15204681A JPS5853659A JP S5853659 A JPS5853659 A JP S5853659A JP 15204681 A JP15204681 A JP 15204681A JP 15204681 A JP15204681 A JP 15204681A JP S5853659 A JPS5853659 A JP S5853659A
Authority
JP
Japan
Prior art keywords
fuel ratio
air
cylinders
engine load
value
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
JP15204681A
Other languages
Japanese (ja)
Inventor
Toshio Yamada
Original Assignee
Toyota Motor 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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP15204681A priority Critical patent/JPS5853659A/en
Publication of JPS5853659A publication Critical patent/JPS5853659A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/14Introducing closed-loop corrections
    • F02D41/1438Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1486Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor with correction for particular operating conditions

Abstract

PURPOSE:To maintain a predetermined accelerating property while enabling an internal-combustion engine to be run with lean air-fuel ratio, by maintaining the air-fuel ratio in all cylinders at at least a first predetermined value when the engine load is smaller than a set value and maintaining same in some cylinders at a second predetermined value when the engine load is larger than the set value. CONSTITUTION:In an electronic control unit 40 receiving signals of respective sensors 28, 29, 30 of intake tempetature, throttle position, water temperature and an air flow meter 2, etc. to control a fuel injection valve 41, etc., a central processing unit 56, ROM 57, input/output interface 61, etc. are connected to each other through a bus 62. When an engine load is less than 3/4, air fuel ratio in all cylinders is maintained at 20-25, and when same exceeds 3/4, the air-fuel ratio in some cylinders maintained at 12-15, that in the other cylinders being varied according to the air-fuel ratio charcteristics stored in ROM 57. Thus, the mixture becomes sufficiently lean so that noxious components in exhaust gas are reduced to ensure sufficiently a desired accelerating property.
JP15204681A 1981-09-28 1981-09-28 Method of controlling air-fuel ratio in internal- combustion engine Pending JPS5853659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15204681A JPS5853659A (en) 1981-09-28 1981-09-28 Method of controlling air-fuel ratio in internal- combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15204681A JPS5853659A (en) 1981-09-28 1981-09-28 Method of controlling air-fuel ratio in internal- combustion engine

Publications (1)

Publication Number Publication Date
JPS5853659A true JPS5853659A (en) 1983-03-30

Family

ID=15531864

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15204681A Pending JPS5853659A (en) 1981-09-28 1981-09-28 Method of controlling air-fuel ratio in internal- combustion engine

Country Status (1)

Country Link
JP (1) JPS5853659A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60133144U (en) * 1984-02-17 1985-09-05
JPS6275043A (en) * 1985-09-26 1987-04-06 Mazda Motor Corp Air-fuel ratio control device for multicylinder engine
JPS62103447A (en) * 1985-10-30 1987-05-13 Mazda Motor Corp Intake-air device for engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60133144U (en) * 1984-02-17 1985-09-05
JPS6275043A (en) * 1985-09-26 1987-04-06 Mazda Motor Corp Air-fuel ratio control device for multicylinder engine
JPS62103447A (en) * 1985-10-30 1987-05-13 Mazda Motor Corp Intake-air device for engine

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