JPS55128136A - Measuring device for air-fuel ratio - Google Patents
Measuring device for air-fuel ratioInfo
- Publication number
- JPS55128136A JPS55128136A JP3647579A JP3647579A JPS55128136A JP S55128136 A JPS55128136 A JP S55128136A JP 3647579 A JP3647579 A JP 3647579A JP 3647579 A JP3647579 A JP 3647579A JP S55128136 A JPS55128136 A JP S55128136A
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- analyzers
- exhaust gas
- content
- 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 Analysing Materials By Optical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
PURPOSE:To minimize errors in the measurement of the air-fuel ratio by processing an analytic detection value of the content of the predetermined components in exhaust gas by LEPs having large time constants as compared with the response time of analyzers and by applying output from the LPFs to an air-fuel ratio calculating arithmetic circuit. CONSTITUTION:Exhaust gas from an engine is added to non-dispersion infrared analyzers 1f, 1'f and an ionization analyzer 2c to allow the carbon dioxide contnet CO2, carbon monoxide content CO and methane gas-converted hydrocarbon content THC in exhaust gas to detect in the forms of electric signals. These signals are applied to an analog computing element AO, in which the air-fuel ratio is calculated on the basis of a predetermined formula, through LPF's 3... having time constants greater than the response times of the analyzers 1f, 1'f, 2c, which are determined by respective resistors R and capacitors C. Accordingly, the air-fuel ratio can be measured with small errors the measuring operation being not influenced by the analyzers 1f, 1'f, 2c with different response speeds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3647579A JPS55128136A (en) | 1979-03-28 | 1979-03-28 | Measuring device for air-fuel ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3647579A JPS55128136A (en) | 1979-03-28 | 1979-03-28 | Measuring device for air-fuel ratio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55128136A true JPS55128136A (en) | 1980-10-03 |
| JPS6333100B2 JPS6333100B2 (en) | 1988-07-04 |
Family
ID=12470832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3647579A Granted JPS55128136A (en) | 1979-03-28 | 1979-03-28 | Measuring device for air-fuel ratio |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55128136A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0374550A (en) * | 1989-08-16 | 1991-03-29 | Osaka Gas Co Ltd | Miss fire detecting device for internal combustion engine |
| JPH07103895A (en) * | 1993-09-30 | 1995-04-21 | Mazda Motor Corp | Concentration detector for exhaust gas component |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3899004B2 (en) * | 2002-09-27 | 2007-03-28 | 株式会社堀場製作所 | In-vehicle HC measuring device |
-
1979
- 1979-03-28 JP JP3647579A patent/JPS55128136A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0374550A (en) * | 1989-08-16 | 1991-03-29 | Osaka Gas Co Ltd | Miss fire detecting device for internal combustion engine |
| JPH07103895A (en) * | 1993-09-30 | 1995-04-21 | Mazda Motor Corp | Concentration detector for exhaust gas component |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6333100B2 (en) | 1988-07-04 |
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