JPS555440A - Air-fuel ratio controller - Google Patents

Air-fuel ratio controller

Info

Publication number
JPS555440A
JPS555440A JP7677878A JP7677878A JPS555440A JP S555440 A JPS555440 A JP S555440A JP 7677878 A JP7677878 A JP 7677878A JP 7677878 A JP7677878 A JP 7677878A JP S555440 A JPS555440 A JP S555440A
Authority
JP
Japan
Prior art keywords
fuel ratio
air
response
temperature
exhaust gas
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
JP7677878A
Other languages
Japanese (ja)
Inventor
Mitsuo Nakamura
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 JP7677878A priority Critical patent/JPS555440A/en
Publication of JPS555440A publication Critical patent/JPS555440A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To accurately control the air-fuel ratio in the theoretical air-fuel ratio, by changing the delay time of a delay circuit mounted in order to respond the difference of the response time of an air-fuel ratio sensor in response to the temperature of exhaust gas.
CONSTITUTION: An air-fuel ratio control unit 30 consists of each circuit of a comparison 40, a delay 50 and an integration 60. The rise of electromotive force is steep or gentle in response to the high or low temperature of exhaust gas in a sensor 20 for obtaining the air-fuel ratio from exhaust gas. The signals of the sensor 20 are compared with theoretical air-fuel ratio voltage Vs by means of a comparator 44, and 1 or O output signals are emitted in response to the concentration of the fuel of mixture. Since a condenser 51 of the delay circuit 50 alters discharge time in response to electric resistance value depending upon the temperature of an exhaust temperature sensor 21, the rise of voltage Vc becomes easy when the temperature of exhaust gas is low, the 1 level output time of a comparator 54 is prolonged, and a fuel feeder 12 is controlled, thus maintaining the theoretical air-fuel ratio.
COPYRIGHT: (C)1980,JPO&Japio
JP7677878A 1978-06-23 1978-06-23 Air-fuel ratio controller Pending JPS555440A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7677878A JPS555440A (en) 1978-06-23 1978-06-23 Air-fuel ratio controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7677878A JPS555440A (en) 1978-06-23 1978-06-23 Air-fuel ratio controller

Publications (1)

Publication Number Publication Date
JPS555440A true JPS555440A (en) 1980-01-16

Family

ID=13615047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7677878A Pending JPS555440A (en) 1978-06-23 1978-06-23 Air-fuel ratio controller

Country Status (1)

Country Link
JP (1) JPS555440A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51143134A (en) * 1975-06-05 1976-12-09 Nippon Denso Co Ltd Fuel ratio feed back fuel injection controller
JPS5281435A (en) * 1975-12-27 1977-07-07 Nissan Motor Co Ltd Air fuel ratio controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51143134A (en) * 1975-06-05 1976-12-09 Nippon Denso Co Ltd Fuel ratio feed back fuel injection controller
JPS5281435A (en) * 1975-12-27 1977-07-07 Nissan Motor Co Ltd Air fuel ratio controller

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