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JPS5584831A - Air-fuel ratio controlling system - Google Patents

Air-fuel ratio controlling system

Info

Publication number
JPS5584831A
JPS5584831A JP4183279A JP4183279A JPS5584831A JP S5584831 A JPS5584831 A JP S5584831A JP 4183279 A JP4183279 A JP 4183279A JP 4183279 A JP4183279 A JP 4183279A JP S5584831 A JPS5584831 A JP S5584831A
Authority
JP
Japan
Prior art keywords
circuit
reference value
fuel ratio
air
sensor
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
JP4183279A
Other languages
Japanese (ja)
Other versions
JPS5621900B2 (en
Inventor
Kenji Ikeura
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP4183279A priority Critical patent/JPS5584831A/en
Publication of JPS5584831A publication Critical patent/JPS5584831A/en
Publication of JPS5621900B2 publication Critical patent/JPS5621900B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To operate an air-fuel ratio controlling system with high accuracy for a long period, by providing a compensation circuit for varying a preset reference value on the basis of parameters representing secular change of sensor in a comparison circuit for comparing output of the sensor with the said reference value.
CONSTITUTION: Output signal of exhaust-gas sensor 11 is compared with a preset reference value in comparison circuit 12, and output of the circuit 12 is processed in air-fuel ratio controlling circuit 13 for driving air-fuel ratio controlling actuator 14. Here, there are further provided a reference value compensating circuit 15 for changing said reference value preset in comparison circuit 12 and a detection and judgement circuit 16 for detecting parameters such as running distance and operation time representing the secular change of sensor 11 so as to actuate said compensation circuit 15. The circuit 15 is designed, for instance, such that voltage at the input terminal of comparator C in comparison circuit 12 is varied by shifting the position of selector switch 20 and hence selecting either one of resistances R1 and R2 depending on the output of circut 16.
COPYRIGHT: (C)1980,JPO&Japio
JP4183279A 1979-04-06 1979-04-06 Air-fuel ratio controlling system Granted JPS5584831A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4183279A JPS5584831A (en) 1979-04-06 1979-04-06 Air-fuel ratio controlling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4183279A JPS5584831A (en) 1979-04-06 1979-04-06 Air-fuel ratio controlling system

Publications (2)

Publication Number Publication Date
JPS5584831A true JPS5584831A (en) 1980-06-26
JPS5621900B2 JPS5621900B2 (en) 1981-05-22

Family

ID=12619230

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4183279A Granted JPS5584831A (en) 1979-04-06 1979-04-06 Air-fuel ratio controlling system

Country Status (1)

Country Link
JP (1) JPS5584831A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115781A (en) * 1988-09-13 1992-05-26 Nippondenso Co., Ltd. Air-fuel ratio controller for internal combustion engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5012427A (en) * 1973-06-05 1975-02-08
JPS5021132A (en) * 1973-06-25 1975-03-06

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5012427A (en) * 1973-06-05 1975-02-08
JPS5021132A (en) * 1973-06-25 1975-03-06

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115781A (en) * 1988-09-13 1992-05-26 Nippondenso Co., Ltd. Air-fuel ratio controller for internal combustion engine

Also Published As

Publication number Publication date
JPS5621900B2 (en) 1981-05-22

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