JPS57146150A - Air-fuel ratio controller for engine - Google Patents
Air-fuel ratio controller for engineInfo
- Publication number
- JPS57146150A JPS57146150A JP56031682A JP3168281A JPS57146150A JP S57146150 A JPS57146150 A JP S57146150A JP 56031682 A JP56031682 A JP 56031682A JP 3168281 A JP3168281 A JP 3168281A JP S57146150 A JPS57146150 A JP S57146150A
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- output
- engine
- air
- fuel ratio
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4077—Means for protecting the electrolyte or the electrodes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Oxygen Concentration In Cells (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 prevent the durability deterioration of a sensor by a method wherein the output of the oxygen sensor is always examined and high-tension voltage is applid to a heater contained in the oxygen sensor when the output of the sensor becomes lower than the predetermined value and carbon is prevented from adhering to the sensor of the sensor element. CONSTITUTION:The output of a sensor 10 and a reference voltage VR are compared by a comparator 26. An output at 'H' level is sent out when the output of the sensor becomes lower than the reference voltage VR. The conformity of the output of the comparator 26 with a high temperature detection signal Q2 (signal at 'H' level) sent from a decision circuit 19 is obtained from an AND gate 27. A lead-in current control circuit 25 is controlled by the output of the AND gate 27 so that the current for the sensor 10 is boosted. Thus carbon is prevented from adhering to the sensor, which also prevents the durability deterioration of the sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56031682A JPS57146150A (en) | 1981-03-05 | 1981-03-05 | Air-fuel ratio controller for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56031682A JPS57146150A (en) | 1981-03-05 | 1981-03-05 | Air-fuel ratio controller for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57146150A true JPS57146150A (en) | 1982-09-09 |
Family
ID=12337861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56031682A Pending JPS57146150A (en) | 1981-03-05 | 1981-03-05 | Air-fuel ratio controller for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57146150A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019203833A (en) * | 2018-05-25 | 2019-11-28 | 株式会社Ｓｏｋｅｎ | Ammonia detector |
-
1981
- 1981-03-05 JP JP56031682A patent/JPS57146150A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019203833A (en) * | 2018-05-25 | 2019-11-28 | 株式会社Ｓｏｋｅｎ | Ammonia detector |
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