JPS5587032A - Detecting method for activity of air fuel ratio - Google Patents
Detecting method for activity of air fuel ratioInfo
- 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
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
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)
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 |
-
1978
- 1978-12-24 JP JP16237478A patent/JPS5587032A/en active Granted
Patent Citations (2)
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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