JPS5618044A - Air-fuel ratio feedback control system for internal combustion engine - Google Patents

Air-fuel ratio feedback control system for internal combustion engine

Info

Publication number
JPS5618044A
JPS5618044A JP9286379A JP9286379A JPS5618044A JP S5618044 A JPS5618044 A JP S5618044A JP 9286379 A JP9286379 A JP 9286379A JP 9286379 A JP9286379 A JP 9286379A JP S5618044 A JPS5618044 A JP S5618044A
Authority
JP
Japan
Prior art keywords
circuit
signal
idling
fuel ratio
air
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
JP9286379A
Other languages
Japanese (ja)
Inventor
Eiji Uematsu
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.)
Hitachi Unisia Automotive Ltd
Original Assignee
Japan Electronic Control Systems 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 Japan Electronic Control Systems Co Ltd filed Critical Japan Electronic Control Systems Co Ltd
Priority to JP9286379A priority Critical patent/JPS5618044A/en
Publication of JPS5618044A publication Critical patent/JPS5618044A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE: To achieve proper control throughout running period of an engine in a system wherein feedback of an engine air-fuel ratio is performed, by providing a proportional component circuit which is adapted to produce different control signals at idling and normal driving, respectively.
CONSTITUTION: A signal A2 of an O2 sensor provided within an exhaust pipe is sent to a deviation detecting circuit 4 along with a comparison reference voltage signal A1. The deviation signal which undergoes operation is fed to a proportional component circuit M2 through an integration circuit M1 located in a control circuit 5. A signal A4 for indicating idling period and normal running period, and an operational amplifier signal A3 are also supplied to the circuit M2 so as to send different output signals to a comparison circuit M3 at idling and normal running periods, respectively. The circuit M3 also receives a constant amplitude oscillation signal A6 for comparison between the two to produce a signal A5 for an air volume regulator.
COPYRIGHT: (C)1981,JPO&Japio
JP9286379A 1979-07-20 1979-07-20 Air-fuel ratio feedback control system for internal combustion engine Pending JPS5618044A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9286379A JPS5618044A (en) 1979-07-20 1979-07-20 Air-fuel ratio feedback control system for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9286379A JPS5618044A (en) 1979-07-20 1979-07-20 Air-fuel ratio feedback control system for internal combustion engine

Publications (1)

Publication Number Publication Date
JPS5618044A true JPS5618044A (en) 1981-02-20

Family

ID=14066257

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9286379A Pending JPS5618044A (en) 1979-07-20 1979-07-20 Air-fuel ratio feedback control system for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS5618044A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5827848A (en) * 1981-08-13 1983-02-18 Toyota Motor Corp Air-fuel ratio controlling method for internal combustion engine
US4375797A (en) * 1980-08-05 1983-03-08 Honda Giken Kogyo Kabushiki Kaisha Air/fuel ratio feedback control system for internal combustion engines
JPS60198348A (en) * 1984-03-23 1985-10-07 Mitsubishi Motors Corp Engine controller

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375797A (en) * 1980-08-05 1983-03-08 Honda Giken Kogyo Kabushiki Kaisha Air/fuel ratio feedback control system for internal combustion engines
JPS5827848A (en) * 1981-08-13 1983-02-18 Toyota Motor Corp Air-fuel ratio controlling method for internal combustion engine
JPS60198348A (en) * 1984-03-23 1985-10-07 Mitsubishi Motors Corp Engine controller

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