JPS56143325A - Method and apparatus for controlling air fuel ratio - Google Patents

Method and apparatus for controlling air fuel ratio

Info

Publication number
JPS56143325A
JPS56143325A JP4513280A JP4513280A JPS56143325A JP S56143325 A JPS56143325 A JP S56143325A JP 4513280 A JP4513280 A JP 4513280A JP 4513280 A JP4513280 A JP 4513280A JP S56143325 A JPS56143325 A JP S56143325A
Authority
JP
Japan
Prior art keywords
output
circuit
fuel ratio
idling condition
detected
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.)
Granted
Application number
JP4513280A
Other languages
Japanese (ja)
Other versions
JPS638294B2 (en
Inventor
Seietsu Yoshida
Shiro Kawai
Toshihisa Ogawa
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
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp, NipponDenso Co Ltd filed Critical Toyota Motor Corp
Priority to JP4513280A priority Critical patent/JPS56143325A/en
Publication of JPS56143325A publication Critical patent/JPS56143325A/en
Publication of JPS638294B2 publication Critical patent/JPS638294B2/ja
Granted 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 prevent variation of air fuel ratio in an internal combustion engine provided with three dimensional catalyst in its exhaust system, by using when idle conditions is detected, an averaged value of feedback control amount within a predetermined time after setting of the idling condition, as a fixed control amount from that time on.
CONSTITUTION: The output of an O2 sensor 1 is applied as the input to an integrating circuit 5 after rich or lean status of fuel is determined by a judging circuit 4. The output VF of the integrating circuit 5 is applied to an actuator 12 through a switch 81 and output circuit 11 in order to adjust fuel amount or air amount for correcting air fuel ratio. Also, the output VF is connected to said output circuit 11 through switches 82, 83 and an integrating circuit 10, while idling condition is detected by an idling detecting circuit 6 through signals from a number of revolutional sensor 2 and negative pressure sensor 3. When the idling condition is detected, the switch 82 is closed. When a predetermined time has elapsed after the detection of the idling condition, the switches 81, 82 are opened and the switch 83 is closed to apply the output V1 of the integrator 10 to the output circuit 11.
COPYRIGHT: (C)1981,JPO&Japio
JP4513280A 1980-04-08 1980-04-08 Method and apparatus for controlling air fuel ratio Granted JPS56143325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4513280A JPS56143325A (en) 1980-04-08 1980-04-08 Method and apparatus for controlling air fuel ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4513280A JPS56143325A (en) 1980-04-08 1980-04-08 Method and apparatus for controlling air fuel ratio

Publications (2)

Publication Number Publication Date
JPS56143325A true JPS56143325A (en) 1981-11-09
JPS638294B2 JPS638294B2 (en) 1988-02-22

Family

ID=12710741

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4513280A Granted JPS56143325A (en) 1980-04-08 1980-04-08 Method and apparatus for controlling air fuel ratio

Country Status (1)

Country Link
JP (1) JPS56143325A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58174141A (en) * 1982-04-06 1983-10-13 Mitsubishi Electric Corp Air fuel ratio controller
JPS59224451A (en) * 1983-06-01 1984-12-17 Daihatsu Motor Co Ltd Air fuel ratio control system for carburetor
JPS61201840A (en) * 1985-03-06 1986-09-06 Hitachi Ltd Engine control device
JPS6267253A (en) * 1985-09-19 1987-03-26 Honda Motor Co Ltd Air-fuel ratio controlling method in internal combustion engine for vehicles
JPS6444339U (en) * 1987-09-10 1989-03-16
US5065727A (en) * 1989-04-28 1991-11-19 Nissan Motor Company, Limited Air/fuel ratio control system for internal combustion engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51149420A (en) * 1975-06-18 1976-12-22 Nissan Motor Co Ltd Air-fuel rati o control device
JPS53118919U (en) * 1977-03-01 1978-09-21

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51149420A (en) * 1975-06-18 1976-12-22 Nissan Motor Co Ltd Air-fuel rati o control device
JPS53118919U (en) * 1977-03-01 1978-09-21

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58174141A (en) * 1982-04-06 1983-10-13 Mitsubishi Electric Corp Air fuel ratio controller
JPS59224451A (en) * 1983-06-01 1984-12-17 Daihatsu Motor Co Ltd Air fuel ratio control system for carburetor
JPS61201840A (en) * 1985-03-06 1986-09-06 Hitachi Ltd Engine control device
JPS6267253A (en) * 1985-09-19 1987-03-26 Honda Motor Co Ltd Air-fuel ratio controlling method in internal combustion engine for vehicles
JPS6444339U (en) * 1987-09-10 1989-03-16
US5065727A (en) * 1989-04-28 1991-11-19 Nissan Motor Company, Limited Air/fuel ratio control system for internal combustion engine

Also Published As

Publication number Publication date
JPS638294B2 (en) 1988-02-22

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