JPS6453039A - Air-fuel ratio controller for internal combustion engine - Google Patents

Air-fuel ratio controller for internal combustion engine

Info

Publication number
JPS6453039A
JPS6453039A JP20450287A JP20450287A JPS6453039A JP S6453039 A JPS6453039 A JP S6453039A JP 20450287 A JP20450287 A JP 20450287A JP 20450287 A JP20450287 A JP 20450287A JP S6453039 A JPS6453039 A JP S6453039A
Authority
JP
Japan
Prior art keywords
fuel ratio
sensor
air
lean
oxygen sensor
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
JP20450287A
Other languages
Japanese (ja)
Inventor
Mitsuhiro Miyake
Osamu Horie
Akira Takahashi
Toru Hashimoto
Yasuyuki Makikawa
Minoru Nishida
Hideaki Katashiba
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
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Electric Corp
Mitsubishi Motors 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, Mitsubishi Motors Corp filed Critical Mitsubishi Electric Corp
Priority to JP20450287A priority Critical patent/JPS6453039A/en
Publication of JPS6453039A publication Critical patent/JPS6453039A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To prevent a miscompensation due to a secular change in an oxygen sensor form occurring by varying a mean air-fuel ratio to rich or lean by degrees, and when an output variation in the oxygen sensor exceeds the specified value, making it so as to be restored to the lean or rich side. CONSTITUTION:Each detected value of an air flow sensor 11, an intake air temperature sensor 12, an atmospheric pressure sensor 13, a throttle sensor 14, an idle switch 15, an oxygen sensor 18 at the downstream of catalytic converter 9, a water temperature sensor 19, etc., is inputted into an electronic control unit ECU, and this control unit operates and controls valve opening time of a fuel injection valve 8. In addition, the ECU varies a mean air-fuel ratio to the lean side from the rich side by degrees, and when an output variation out of the detected value of the oxygen sensor 18 exceeds the specified value, it varies the mean air-fuel ratio to the rich side.
JP20450287A 1987-08-18 1987-08-18 Air-fuel ratio controller for internal combustion engine Pending JPS6453039A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20450287A JPS6453039A (en) 1987-08-18 1987-08-18 Air-fuel ratio controller for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20450287A JPS6453039A (en) 1987-08-18 1987-08-18 Air-fuel ratio controller for internal combustion engine

Publications (1)

Publication Number Publication Date
JPS6453039A true JPS6453039A (en) 1989-03-01

Family

ID=16491590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20450287A Pending JPS6453039A (en) 1987-08-18 1987-08-18 Air-fuel ratio controller for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS6453039A (en)

Similar Documents

Publication Publication Date Title
JPS55160135A (en) Suction air controller
JPS6453042A (en) Air-fuel ratio controller for internal combustion engine
JPS6429642A (en) Air-fuel ratio controller for engine
JPS6453043A (en) Air-fuel ratio controller for internal combustion engine
JPS5776231A (en) Electronically controlled fuel injection
JPS6432040A (en) Fuel cut device for internal combustion engine
JPS6466439A (en) Air-fuel ratio controlling method of internal combustion engine
JPS6460744A (en) Air-fuel ratio feedback control method for internal combustion engine
JPS6412046A (en) Air-fuel control apparatus of internal combustion engine
JPS6424142A (en) Control method for internal combustion engine
JPS6466427A (en) Fuel supply control device for internal combustion engine
JPS6453039A (en) Air-fuel ratio controller for internal combustion engine
JPS5765826A (en) Electronically controlled fuel injection
JPS6466441A (en) Air-fuel ratio control device of internal combustion engine
JPS6466436A (en) Fuel supply control device of internal combustion engine
JPS6453041A (en) Air-fuel ratio controller for internal combustion engine
JPS5718453A (en) Ignition timing control method for internal combustion engine
JPS6432037A (en) Fuel injection controller
JPS6453032A (en) Fuel injection quantity controller for internal combustion engine with exhaust gas recirculation system
JPS6466438A (en) Electronically controlled fuel injection device for internal combustion engine
JPS6469743A (en) Fuel feed quantity control for internal combustion engine
JPS551412A (en) Compensating concentration of mixture in internal combustion engine
JPS6436942A (en) Control device for air-fuel ratio of internal combustion engine
JPS6432042A (en) Air-fuel ratio controller for internal combustion engine
JP2694272B2 (en) Air-fuel ratio control device for internal combustion engine