JPS5523382A - Air to fuel ratio controller - Google Patents

Air to fuel ratio controller

Info

Publication number
JPS5523382A
JPS5523382A JP9710078A JP9710078A JPS5523382A JP S5523382 A JPS5523382 A JP S5523382A JP 9710078 A JP9710078 A JP 9710078A JP 9710078 A JP9710078 A JP 9710078A JP S5523382 A JPS5523382 A JP S5523382A
Authority
JP
Japan
Prior art keywords
circuit
air
fuel
comparative
change
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
JP9710078A
Other languages
Japanese (ja)
Inventor
Hideaki Norimatsu
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 JP9710078A priority Critical patent/JPS5523382A/en
Publication of JPS5523382A publication Critical patent/JPS5523382A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: For correct air to fuel ratio judgement, means are provided for a delay circuit which delayedly outputs air-to-fuel ratio sensor voltage variation, a comparator circuit using such output as comparative level, and a switch circuit to change by a specified valve the comparative level.
CONSTITUTION: Stepwise change with boundary of a specified air-to-ratio of the air- to-fuel-ratio-sensor 10 resistance is used. This change is outputted as the variation of sensor terminal voltage Vs by constant current fed from delayed circuit 20. The output voltage becomes delayed voltage signal VB and fed to the comparator circuit as comparative level. When exhaust gas temperature change causes the sensor terminal voltage Vs to change, delay output follows. This permits the comparative circuit 30 to always judge whether air-to-fuel is above or below the specified value. When fuel stops, high level signal from the fuel-stop instruction circuit 60 is fed into the comparative level switch circuit 70, and comparative level of the comparative circuit 30 becomes a constant valve Vc determined by resistance 706, 708. Also in this case air-to-fuel ratio can be judged.
COPYRIGHT: (C)1980,JPO&Japio
JP9710078A 1978-08-09 1978-08-09 Air to fuel ratio controller Pending JPS5523382A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9710078A JPS5523382A (en) 1978-08-09 1978-08-09 Air to fuel ratio controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9710078A JPS5523382A (en) 1978-08-09 1978-08-09 Air to fuel ratio controller

Publications (1)

Publication Number Publication Date
JPS5523382A true JPS5523382A (en) 1980-02-19

Family

ID=14183189

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9710078A Pending JPS5523382A (en) 1978-08-09 1978-08-09 Air to fuel ratio controller

Country Status (1)

Country Link
JP (1) JPS5523382A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6432442U (en) * 1987-08-19 1989-03-01
JPH06310263A (en) * 1993-04-23 1994-11-04 Sakaguchi Dennetsu Kk Sheath heater and its manufacture

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5021132A (en) * 1973-06-25 1975-03-06
JPS5213257A (en) * 1975-07-22 1977-02-01 Shinji Tanaka Powder feed apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5021132A (en) * 1973-06-25 1975-03-06
JPS5213257A (en) * 1975-07-22 1977-02-01 Shinji Tanaka Powder feed apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6432442U (en) * 1987-08-19 1989-03-01
JPH06310263A (en) * 1993-04-23 1994-11-04 Sakaguchi Dennetsu Kk Sheath heater and its manufacture

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