JPS5584830A - Air-fuel ratio controlling system - Google Patents

Air-fuel ratio controlling system

Info

Publication number
JPS5584830A
JPS5584830A JP15901978A JP15901978A JPS5584830A JP S5584830 A JPS5584830 A JP S5584830A JP 15901978 A JP15901978 A JP 15901978A JP 15901978 A JP15901978 A JP 15901978A JP S5584830 A JPS5584830 A JP S5584830A
Authority
JP
Japan
Prior art keywords
circuit
fuel ratio
air
engine
interrupting
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
JP15901978A
Other languages
Japanese (ja)
Inventor
Takashi Wakabayashi
Tomihide Suzuki
Masahiko Miyaki
Masao Tsujii
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.)
Denso Corp
Original Assignee
NipponDenso 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 NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP15901978A priority Critical patent/JPS5584830A/en
Publication of JPS5584830A publication Critical patent/JPS5584830A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To enable to start feedback control promptly when feedback control is interrupted, by providing a circuit for detecting the extent of engine warming, and controlling a feedback interrupting circuit for interrupting feedback control of air- fuel ratio and other circuits depending on the output of the said engine-warming detecting circuit.
CONSTITUTION: An air-fuel ratio controlling system of this invention comprises an injection controlling circuit 2 and an air-fuel ratio feedback circuit 5 which includes an air-fuel ratio judging circuit 51 for judging the level of air-fuel ratio through comparison of output of air-fuel ratio sensor 4 with a reference value and an integration circuit 52 for compensating the width of injection pulse by integrating the output of said circuit 51 and furnishing the result to multiplication circuit 23 in circuit 2. The air-fuel ratio controlling system further comprises an engine warming circuit 7 including circuit 72 for detecting the extent of engine warming, a feedback interrupting circuit 53 for interrupting feedback control of air-fuel ratio depending on the output of said circuit 7 and output signal representing operational condition of engine, and a changeover instructing circuit 54 operated to increase the basic air- fuel ratio only when instruction for interrupting feedback control is given after engine is warmed up and to switch the basic air-fuel ratio to a predetermined air- fuel ratio under other states.
COPYRIGHT: (C)1980,JPO&Japio
JP15901978A 1978-12-20 1978-12-20 Air-fuel ratio controlling system Pending JPS5584830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15901978A JPS5584830A (en) 1978-12-20 1978-12-20 Air-fuel ratio controlling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15901978A JPS5584830A (en) 1978-12-20 1978-12-20 Air-fuel ratio controlling system

Publications (1)

Publication Number Publication Date
JPS5584830A true JPS5584830A (en) 1980-06-26

Family

ID=15684466

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15901978A Pending JPS5584830A (en) 1978-12-20 1978-12-20 Air-fuel ratio controlling system

Country Status (1)

Country Link
JP (1) JPS5584830A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5720540A (en) * 1980-07-11 1982-02-03 Aisan Ind Co Ltd Air fuel ratio control in carbureter
JPS63113143A (en) * 1986-10-30 1988-05-18 Honda Motor Co Ltd Air-fuel ratio controlling method for internal combustion engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5264539A (en) * 1975-11-25 1977-05-28 Nippon Denso Co Ltd Feedback air fuel ratio type mixture controller
JPS52135924A (en) * 1976-05-10 1977-11-14 Nissan Motor Co Ltd Air fuel ratio control equipment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5264539A (en) * 1975-11-25 1977-05-28 Nippon Denso Co Ltd Feedback air fuel ratio type mixture controller
JPS52135924A (en) * 1976-05-10 1977-11-14 Nissan Motor Co Ltd Air fuel ratio control equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5720540A (en) * 1980-07-11 1982-02-03 Aisan Ind Co Ltd Air fuel ratio control in carbureter
JPS63113143A (en) * 1986-10-30 1988-05-18 Honda Motor Co Ltd Air-fuel ratio controlling method for internal combustion engine

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