JPS55101736A - Air-fuel ratio control device at internal combustion engine - Google Patents

Air-fuel ratio control device at internal combustion engine

Info

Publication number
JPS55101736A
JPS55101736A JP878279A JP878279A JPS55101736A JP S55101736 A JPS55101736 A JP S55101736A JP 878279 A JP878279 A JP 878279A JP 878279 A JP878279 A JP 878279A JP S55101736 A JPS55101736 A JP S55101736A
Authority
JP
Japan
Prior art keywords
circuit
output
signal
comparators
air flow
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
JP878279A
Other languages
Japanese (ja)
Inventor
Toshio Shinohara
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor 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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP878279A priority Critical patent/JPS55101736A/en
Publication of JPS55101736A publication Critical patent/JPS55101736A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To reduce noxial exhaust gas and to save fuel consumption by a method wherein the precise forcasting arithmetic operation of A/F at the time of transient operation is made based on the air flow meter output signal and the differential signal thereof to control fuel consumption.
CONSTITUTION: The output from an air flow meter 1 is differentiated by a differential circuit 2 and is input into the comparators 9, 10 to be judged as positive or minus, while the output from a throttle valve opening detection circuit 14 is input into the comparators 16, 17 to similarly be judged as positive or minus. "AND" of the output from the comparators is operated by the AND circuit 11 and by its signal an analogue switch 4, 6 and an proportional differential arithmetic circuit 5 is operated to proportionally differentiate an air flow meter signal. At this time, the output from the AND circuit 11 is inverted to put the analogue switch 3 "off" and to put it "on" after a prescribed time. The signal thus composed is input into an EFI system through the filter circuit 7 and the analogue switch 8.
COPYRIGHT: (C)1980,JPO&Japio
JP878279A 1979-01-30 1979-01-30 Air-fuel ratio control device at internal combustion engine Pending JPS55101736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP878279A JPS55101736A (en) 1979-01-30 1979-01-30 Air-fuel ratio control device at internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP878279A JPS55101736A (en) 1979-01-30 1979-01-30 Air-fuel ratio control device at internal combustion engine

Publications (1)

Publication Number Publication Date
JPS55101736A true JPS55101736A (en) 1980-08-04

Family

ID=11702439

Family Applications (1)

Application Number Title Priority Date Filing Date
JP878279A Pending JPS55101736A (en) 1979-01-30 1979-01-30 Air-fuel ratio control device at internal combustion engine

Country Status (1)

Country Link
JP (1) JPS55101736A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03102035U (en) * 1990-02-01 1991-10-24

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4967017A (en) * 1972-09-01 1974-06-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4967017A (en) * 1972-09-01 1974-06-28

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03102035U (en) * 1990-02-01 1991-10-24

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