JPS5622949A - Exhaust sensor bias circuit of air fuel ratio controller - Google Patents

Exhaust sensor bias circuit of air fuel ratio controller

Info

Publication number
JPS5622949A
JPS5622949A JP9811379A JP9811379A JPS5622949A JP S5622949 A JPS5622949 A JP S5622949A JP 9811379 A JP9811379 A JP 9811379A JP 9811379 A JP9811379 A JP 9811379A JP S5622949 A JPS5622949 A JP S5622949A
Authority
JP
Japan
Prior art keywords
voltage
sensor
mixture concentration
output
exhaust 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
JP9811379A
Other languages
Japanese (ja)
Other versions
JPS6029899B2 (en
Inventor
Shoji Furuhashi
Hideyuki Tamura
Toshio Enoshima
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 JP54098113A priority Critical patent/JPS6029899B2/en
Publication of JPS5622949A publication Critical patent/JPS5622949A/en
Publication of JPS6029899B2 publication Critical patent/JPS6029899B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Measuring Oxygen Concentration In Cells (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE: To make it possible to improve stability in control switching while facilitating control by flowing electric current by applying a constant voltage lower than a reference value to an exhaust sensor.
CONSTITUTION: Bias circuit 16 applies voltage V1, obtained by voltage-dividing constant voltage Vc by resistances R1 and R2, to exhaust sensor 15 through resistance R0 and apparent output voltage V0 of sensor 15 is amplified by input amplifying circuit 17, whose output is sent out via output terminal 18. With voltage V1 set below reference value VS, sensor output VR when mixture concentration is rich and output VL when lean, both decrease below VS. For the purpose, the controller decides that the mixture concentration is lean without reference to the mixture concentration and exercises control so that the mixture concentration becomes rich. Then, since the open-loop control starts from the state, the engine rotation never becomes unstable due to an excessive decrease in mixture concentration in the transition. Further, voltage V1 is low and currnet inflow to the sensor is small, so that the sensor will never deteriorate.
COPYRIGHT: (C)1981,JPO&Japio
JP54098113A 1979-08-02 1979-08-02 Exhaust sensor bias circuit of air-fuel ratio control device Expired JPS6029899B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54098113A JPS6029899B2 (en) 1979-08-02 1979-08-02 Exhaust sensor bias circuit of air-fuel ratio control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54098113A JPS6029899B2 (en) 1979-08-02 1979-08-02 Exhaust sensor bias circuit of air-fuel ratio control device

Publications (2)

Publication Number Publication Date
JPS5622949A true JPS5622949A (en) 1981-03-04
JPS6029899B2 JPS6029899B2 (en) 1985-07-13

Family

ID=14211258

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54098113A Expired JPS6029899B2 (en) 1979-08-02 1979-08-02 Exhaust sensor bias circuit of air-fuel ratio control device

Country Status (1)

Country Link
JP (1) JPS6029899B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62190461A (en) * 1986-02-17 1987-08-20 Ngk Spark Plug Co Ltd Activation detecting device for air fuel ratio sensor
JPS62197759A (en) * 1986-02-25 1987-09-01 Ngk Spark Plug Co Ltd Activation detector for air/fuel ratio detector
JP2015034800A (en) * 2013-08-09 2015-02-19 株式会社デンソー Gas sensor control device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62190461A (en) * 1986-02-17 1987-08-20 Ngk Spark Plug Co Ltd Activation detecting device for air fuel ratio sensor
JPS62197759A (en) * 1986-02-25 1987-09-01 Ngk Spark Plug Co Ltd Activation detector for air/fuel ratio detector
JP2015034800A (en) * 2013-08-09 2015-02-19 株式会社デンソー Gas sensor control device

Also Published As

Publication number Publication date
JPS6029899B2 (en) 1985-07-13

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