JPS57151035A - Control device of air-fuel ratio in multi-cylinder engine - Google Patents

Control device of air-fuel ratio in multi-cylinder engine

Info

Publication number
JPS57151035A
JPS57151035A JP3563181A JP3563181A JPS57151035A JP S57151035 A JPS57151035 A JP S57151035A JP 3563181 A JP3563181 A JP 3563181A JP 3563181 A JP3563181 A JP 3563181A JP S57151035 A JPS57151035 A JP S57151035A
Authority
JP
Japan
Prior art keywords
fuel ratio
air
engine
cylinder group
output
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
JP3563181A
Other languages
Japanese (ja)
Inventor
Katsuyoshi Iida
Hisashi Zaima
Tokuichi Matsumoto
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.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Toyo Kogyo 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 Mazda Motor Corp, Toyo Kogyo Co Ltd filed Critical Mazda Motor Corp
Priority to JP3563181A priority Critical patent/JPS57151035A/en
Publication of JPS57151035A publication Critical patent/JPS57151035A/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
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/1441—Plural sensors
    • F02D41/1443—Plural sensors with one sensor per cylinder or group of cylinders

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 perform optimum control of air-fuel ratio in the method of feedback controlling output from exhaust sensors, by switching the exhaust sensor and changing the overall air-fuel ratio of an engine in accordancd with its operating condition. CONSTITUTION:At steady operation of an engine 1, feedback control is performed on the basis of output from the first exhaust sensor 14a, then logical air- fuel ratio is obtained for air-fuel ratio of a mixture fed to the first cylinder group 1b, 1c, while air-fuel ratio fed to the second cylinder group 1a, 1d is reduced to a lean state by the preset value, and the overall air-fuel ratio of the engine is also reduced to a lean state to improve its fuel consumption. Further a switching circuit 15 detects an operating condition in accordance with signals of sensors 17, 18, 10 for cooling water temperature, intake negative pressure and speed, and output of the second exhaust sensor 1b is fed back to an air-fuel ratio correction circuit 16 at cold, low and high load state of the engine, then the control is performed for the second cylinder group 1a, 1d to logical air-fuel ratio while for the first cylinder group 1b, 1c to a rich state, thus output performance can be improved.
JP3563181A 1981-03-11 1981-03-11 Control device of air-fuel ratio in multi-cylinder engine Pending JPS57151035A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3563181A JPS57151035A (en) 1981-03-11 1981-03-11 Control device of air-fuel ratio in multi-cylinder engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3563181A JPS57151035A (en) 1981-03-11 1981-03-11 Control device of air-fuel ratio in multi-cylinder engine

Publications (1)

Publication Number Publication Date
JPS57151035A true JPS57151035A (en) 1982-09-18

Family

ID=12447209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3563181A Pending JPS57151035A (en) 1981-03-11 1981-03-11 Control device of air-fuel ratio in multi-cylinder engine

Country Status (1)

Country Link
JP (1) JPS57151035A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5248739A (en) * 1975-10-14 1977-04-19 Nippon Denso Co Ltd Air-fuel ratio feed back system fuel controller
JPS564739A (en) * 1979-06-23 1981-01-19 Berger Johann Weaving of belt having tubular flange and yarn passing instrument used therin

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5248739A (en) * 1975-10-14 1977-04-19 Nippon Denso Co Ltd Air-fuel ratio feed back system fuel controller
JPS564739A (en) * 1979-06-23 1981-01-19 Berger Johann Weaving of belt having tubular flange and yarn passing instrument used therin

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