JPS55445A - Air-fuel ratio detector - Google Patents

Air-fuel ratio detector

Info

Publication number
JPS55445A
JPS55445A JP7389278A JP7389278A JPS55445A JP S55445 A JPS55445 A JP S55445A JP 7389278 A JP7389278 A JP 7389278A JP 7389278 A JP7389278 A JP 7389278A JP S55445 A JPS55445 A JP S55445A
Authority
JP
Japan
Prior art keywords
fuel ratio
air
voltage
circuit
operative
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
JP7389278A
Other languages
Japanese (ja)
Other versions
JPS616934B2 (en
Inventor
Tadashi Hattori
Yoshiki Ueno
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.)
Soken Inc
Original Assignee
Nippon Soken Inc
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 Nippon Soken Inc filed Critical Nippon Soken Inc
Priority to JP7389278A priority Critical patent/JPS55445A/en
Publication of JPS55445A publication Critical patent/JPS55445A/en
Publication of JPS616934B2 publication Critical patent/JPS616934B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE: To detect the air-fuel ratio satisfactorily without any relationship with the use temperature and aging by specifying a reference voltage.
CONSTITUTION: There are provided a demultiplexer 121, which is operative to select the input signals in response to the strobo signals of a timing circuit 34 thereby to distribute the same to two channels, an AD converter 122, which is operative to convert the analog output voltage of a peak smaple circuit 35 selected thereby into binary digital signals, a calculating circuit 123, which is operative to calculate the intermediate value from the peak values at the lean and rich sides during one period of a voltage VA as well as the output signals of the converter 122, and an AD converter 124, thus constituting a voltage generating circuit 36. As a result, the voltages at the lean and rich sides of a connection A between an air-fuel ratio sensor 20 and a resistor 32 are detected at a preset time, and the intermediate value between the voltages detected is used as a reference voltage, which is compared with the voltage VA at the connection A by a comparator circuit 33 so that the air-fuel ratio detection can be prevented from becoming erroneous and impossible.
COPYRIGHT: (C)1980,JPO&Japio
JP7389278A 1978-06-19 1978-06-19 Air-fuel ratio detector Granted JPS55445A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7389278A JPS55445A (en) 1978-06-19 1978-06-19 Air-fuel ratio detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7389278A JPS55445A (en) 1978-06-19 1978-06-19 Air-fuel ratio detector

Publications (2)

Publication Number Publication Date
JPS55445A true JPS55445A (en) 1980-01-05
JPS616934B2 JPS616934B2 (en) 1986-03-03

Family

ID=13531300

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7389278A Granted JPS55445A (en) 1978-06-19 1978-06-19 Air-fuel ratio detector

Country Status (1)

Country Link
JP (1) JPS55445A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0326857A (en) * 1989-06-26 1991-02-05 Nissan Motor Co Ltd Air-fuel ratio detector for engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0326857A (en) * 1989-06-26 1991-02-05 Nissan Motor Co Ltd Air-fuel ratio detector for engine

Also Published As

Publication number Publication date
JPS616934B2 (en) 1986-03-03

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