JPS5587032A - Detecting method for activity of air fuel ratio - Google Patents

Detecting method for activity of air fuel ratio

Info

Publication number
JPS5587032A
JPS5587032A JP16237478A JP16237478A JPS5587032A JP S5587032 A JPS5587032 A JP S5587032A JP 16237478 A JP16237478 A JP 16237478A JP 16237478 A JP16237478 A JP 16237478A JP S5587032 A JPS5587032 A JP S5587032A
Authority
JP
Japan
Prior art keywords
fuel ratio
air fuel
sensor
activity
decision
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
JP16237478A
Other languages
Japanese (ja)
Other versions
JPS6235057B2 (en
Inventor
Hideaki Norimatsu
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 Corp
Original Assignee
NipponDenso 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 NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP16237478A priority Critical patent/JPS5587032A/en
Publication of JPS5587032A publication Critical patent/JPS5587032A/en
Publication of JPS6235057B2 publication Critical patent/JPS6235057B2/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)

Abstract

PURPOSE: To eliminate the need for a bias current besides the detection of the internal impedance of an air fuel ratio sensor, by deciding upon the activity state of the sensor by detecting the variation ratio and variation width of the terminal output of the sensor.
CONSTITUTION: In a method of making a detecting decision on whether an air fuel ratio sensor installed at the exhaustion system of an engine and detecting an air fuel ratio is in an active state or not, the terminal output of air fuel ratio sensor 1 is amplified by amplifier 2 and led to activity decision circuit 3, which makes a decision that sensor 1 is in the active state where its terminal output varies at a varation rate more than a fixed value with its variation width of more than a fixed value. the output signal of decision circuit 3 is led to active signal output circuit 4 to control air fuel ratio control circuit 5.
COPYRIGHT: (C)1980,JPO&Japio
JP16237478A 1978-12-24 1978-12-24 Detecting method for activity of air fuel ratio Granted JPS5587032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16237478A JPS5587032A (en) 1978-12-24 1978-12-24 Detecting method for activity of air fuel ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16237478A JPS5587032A (en) 1978-12-24 1978-12-24 Detecting method for activity of air fuel ratio

Publications (2)

Publication Number Publication Date
JPS5587032A true JPS5587032A (en) 1980-07-01
JPS6235057B2 JPS6235057B2 (en) 1987-07-30

Family

ID=15753352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16237478A Granted JPS5587032A (en) 1978-12-24 1978-12-24 Detecting method for activity of air fuel ratio

Country Status (1)

Country Link
JP (1) JPS5587032A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5147486A (en) * 1974-09-30 1976-04-23 Bendix Corp Haikigasusensano tameno kenshutsusochi
JPS53104029A (en) * 1977-02-21 1978-09-09 Bosch Gmbh Robert Monitoring system and device of responsible condition of lambderrsensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5147486A (en) * 1974-09-30 1976-04-23 Bendix Corp Haikigasusensano tameno kenshutsusochi
JPS53104029A (en) * 1977-02-21 1978-09-09 Bosch Gmbh Robert Monitoring system and device of responsible condition of lambderrsensor

Also Published As

Publication number Publication date
JPS6235057B2 (en) 1987-07-30

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