JPS5656933A - Air-fuel ratio controlling apparatus for internal combustion engine - Google Patents

Air-fuel ratio controlling apparatus for internal combustion engine

Info

Publication number
JPS5656933A
JPS5656933A JP13290779A JP13290779A JPS5656933A JP S5656933 A JPS5656933 A JP S5656933A JP 13290779 A JP13290779 A JP 13290779A JP 13290779 A JP13290779 A JP 13290779A JP S5656933 A JPS5656933 A JP S5656933A
Authority
JP
Japan
Prior art keywords
integrator
comparator
fuel ratio
air
reference voltage
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
JP13290779A
Other languages
Japanese (ja)
Other versions
JPS6257814B2 (en
Inventor
Kaoru Uno
Michio Takegawa
Toshiaki Isobe
Kazuhisa Sawada
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 JP13290779A priority Critical patent/JPS5656933A/en
Publication of JPS5656933A publication Critical patent/JPS5656933A/en
Publication of JPS6257814B2 publication Critical patent/JPS6257814B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To keep an appropriate air-fuel ratio independently of the composition of fuel and to thereby prevent degradation in the exhaust-gas purifying performance of an engine, by providing a control means for changing the reference voltage of a comparator in response to a predetermined value of the output voltage of an integrator.
CONSTITUTION: When the output voltage of an integrator 18 is lowr than a reference voltage Va, the output of a comparator 25 is kept at zero, so that a reference voltage Vb1 is applied from a reference power source 28 to an inverted terminal of a comparator 17 via a switching element 27. Since pulses from an air-fuel ratio sensor 11 are thus compared with a lower reference voltage Vb1, the rising time of output pulses of comparator 17 is determined relatively promptly at the inclined side along which rises the pulses from sensor 11 and the end of the rising period of the output voltage of integrator 18 is also determined relatively promptly. Therefore, it is enabled to prevent rising of the output voltage of integrator 18.
COPYRIGHT: (C)1981,JPO&Japio
JP13290779A 1979-10-17 1979-10-17 Air-fuel ratio controlling apparatus for internal combustion engine Granted JPS5656933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13290779A JPS5656933A (en) 1979-10-17 1979-10-17 Air-fuel ratio controlling apparatus for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13290779A JPS5656933A (en) 1979-10-17 1979-10-17 Air-fuel ratio controlling apparatus for internal combustion engine

Publications (2)

Publication Number Publication Date
JPS5656933A true JPS5656933A (en) 1981-05-19
JPS6257814B2 JPS6257814B2 (en) 1987-12-02

Family

ID=15092311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13290779A Granted JPS5656933A (en) 1979-10-17 1979-10-17 Air-fuel ratio controlling apparatus for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS5656933A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54132021A (en) * 1978-04-03 1979-10-13 Nippon Denso Co Ltd Air-fuel-ratio controller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54132021A (en) * 1978-04-03 1979-10-13 Nippon Denso Co Ltd Air-fuel-ratio controller

Also Published As

Publication number Publication date
JPS6257814B2 (en) 1987-12-02

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