JPS55109952A - Air-fuel-ratio detection circuit using titania type sensor - Google Patents

Air-fuel-ratio detection circuit using titania type sensor

Info

Publication number
JPS55109952A
JPS55109952A JP1679279A JP1679279A JPS55109952A JP S55109952 A JPS55109952 A JP S55109952A JP 1679279 A JP1679279 A JP 1679279A JP 1679279 A JP1679279 A JP 1679279A JP S55109952 A JPS55109952 A JP S55109952A
Authority
JP
Japan
Prior art keywords
sensor
type sensor
titania type
detection output
output
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
JP1679279A
Other languages
Japanese (ja)
Inventor
Susumu Takagi
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 Ten Ltd
Original Assignee
Denso Ten 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 Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP1679279A priority Critical patent/JPS55109952A/en
Publication of JPS55109952A publication Critical patent/JPS55109952A/en
Pending legal-status Critical Current

Links

Landscapes

  • 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 compensate temperature characteristic of a titania type sensor easily and securely by controlling the gain of a variable gain amplifier amplifying the output of the sensor on the basis of temperature information obtained from the output of the sensor.
CONSTITUTION: According to the maximum value or minimum value of the detection output of titania type sensor Rθ, temperature information about exhaust gas is obtained and on the basis of this information, the gain of variable gain amplifier VGA is controlled to make an exponential function center value, between the maximum and minimum of the detection output of sensor Rθ, agree with a reference voltage applied to comparator CPo via voltage-dividing resistance Rc. Therefore, an influence of the temperature of the detection output of sensor Rθ is compensated to detect the excess and insufficiency of oxygen in the exhaust gas corresponding to the maximum and minimum of the detection output, and an air fuel ratio can be detected through the oxygen concentration detection of the titania type sensor which provides the temperature compensation easily and securely.
COPYRIGHT: (C)1980,JPO&Japio
JP1679279A 1979-02-16 1979-02-16 Air-fuel-ratio detection circuit using titania type sensor Pending JPS55109952A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1679279A JPS55109952A (en) 1979-02-16 1979-02-16 Air-fuel-ratio detection circuit using titania type sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1679279A JPS55109952A (en) 1979-02-16 1979-02-16 Air-fuel-ratio detection circuit using titania type sensor

Publications (1)

Publication Number Publication Date
JPS55109952A true JPS55109952A (en) 1980-08-23

Family

ID=11926018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1679279A Pending JPS55109952A (en) 1979-02-16 1979-02-16 Air-fuel-ratio detection circuit using titania type sensor

Country Status (1)

Country Link
JP (1) JPS55109952A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5790147A (en) * 1980-11-26 1982-06-04 Toyota Central Res & Dev Lab Inc Air-fuel ratio gauge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5790147A (en) * 1980-11-26 1982-06-04 Toyota Central Res & Dev Lab Inc Air-fuel ratio gauge
JPH0115817B2 (en) * 1980-11-26 1989-03-20 Toyoda Chuo Kenkyusho Kk

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