JPS57203843A - Air-fuel ratio feedback control device - Google Patents

Air-fuel ratio feedback control device

Info

Publication number
JPS57203843A
JPS57203843A JP8984781A JP8984781A JPS57203843A JP S57203843 A JPS57203843 A JP S57203843A JP 8984781 A JP8984781 A JP 8984781A JP 8984781 A JP8984781 A JP 8984781A JP S57203843 A JPS57203843 A JP S57203843A
Authority
JP
Japan
Prior art keywords
fuel ratio
air
sensor
output
output signal
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
JP8984781A
Other languages
Japanese (ja)
Inventor
Seishi Wataya
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 JP8984781A priority Critical patent/JPS57203843A/en
Publication of JPS57203843A publication Critical patent/JPS57203843A/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

Abstract

PURPOSE:To control the air-fuel ratio accurately by a method wherein a fluctuation due to the temperature, aging variation or the like of an air-fuel ratio sensor, in which the output signal thereof a changed continuously with respect to the air-fuel ratio, is compensated by another air-fuel ratio sensor in which the output thereof is inverted at the vicinity of a logical air-fuel ratio. CONSTITUTION:The air-fuel ratio sensor 5, in which the output signal thereof is inverted at the vinicity of the logical air-fuel ratio, and the air-fuel ratio sensor 7, in which the output signal thereof is changed continuously with respect to the air-fuel ratio, are provided on an exhaust tube 6, which the output signals thereof are inputted into an air-fuel ratio control circuit 4. During conrolling an air-fuel ratio regulating means 2 by the feedback in accordance with the output signal of the sensor 7, the output of the sensor 7 is read at a time when the output of the air-fuel ratio sensor 5 is inverted, and the error of the output signal relative to the regular signal upon the logical air-fuel ratio is obtained. Subsequently, the value of said error is subtracted from a detected value, whereby, the feedback control having a small error may be effected in all operating conditions.
JP8984781A 1981-06-10 1981-06-10 Air-fuel ratio feedback control device Pending JPS57203843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8984781A JPS57203843A (en) 1981-06-10 1981-06-10 Air-fuel ratio feedback control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8984781A JPS57203843A (en) 1981-06-10 1981-06-10 Air-fuel ratio feedback control device

Publications (1)

Publication Number Publication Date
JPS57203843A true JPS57203843A (en) 1982-12-14

Family

ID=13982156

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8984781A Pending JPS57203843A (en) 1981-06-10 1981-06-10 Air-fuel ratio feedback control device

Country Status (1)

Country Link
JP (1) JPS57203843A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079132A (en) * 1983-10-04 1985-05-04 Mitsubishi Electric Corp Air-fuel ratio controller for engine
FR2599088A1 (en) * 1986-05-23 1987-11-27 Renault Method for controlling a process slaved to the value of one parameter, in particular for controlling the richness of the air-fuel mixture of an engine as a function of the temperature of this engine
JPH0211844A (en) * 1988-06-30 1990-01-16 Honda Motor Co Ltd Correction of output of exhaust concentration sensor
WO1994019593A1 (en) * 1993-02-26 1994-09-01 Roth-Technik Gmbh & Co. Forschung Für Automobil- Une Umwelttechnik Combination of lambda sensors
WO2008073721A2 (en) * 2006-12-08 2008-06-19 General Electric Company Sensor system and method
US20120174900A1 (en) * 2010-12-24 2012-07-12 Toyota Jidosha Kabushiki Kaisha Apparatus and method for detecting variation abnormality in air-fuel ratio between cylinders

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079132A (en) * 1983-10-04 1985-05-04 Mitsubishi Electric Corp Air-fuel ratio controller for engine
JPS637255B2 (en) * 1983-10-04 1988-02-16 Mitsubishi Electric Corp
FR2599088A1 (en) * 1986-05-23 1987-11-27 Renault Method for controlling a process slaved to the value of one parameter, in particular for controlling the richness of the air-fuel mixture of an engine as a function of the temperature of this engine
JPH0211844A (en) * 1988-06-30 1990-01-16 Honda Motor Co Ltd Correction of output of exhaust concentration sensor
WO1994019593A1 (en) * 1993-02-26 1994-09-01 Roth-Technik Gmbh & Co. Forschung Für Automobil- Une Umwelttechnik Combination of lambda sensors
US5658445A (en) * 1993-02-26 1997-08-19 Haefele; Edelbert Combination of lambda probes
WO2008073721A2 (en) * 2006-12-08 2008-06-19 General Electric Company Sensor system and method
WO2008073721A3 (en) * 2006-12-08 2008-08-21 Gen Electric Sensor system and method
US7581428B2 (en) 2006-12-08 2009-09-01 General Electric Company Sensor system and method
US20120174900A1 (en) * 2010-12-24 2012-07-12 Toyota Jidosha Kabushiki Kaisha Apparatus and method for detecting variation abnormality in air-fuel ratio between cylinders

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