FAST-RESPONSE ZIRCONIA SENSOR-BASED INSTRUMENT FOR MEASUREMENT OF THE AIR/FUEL RATIO OF COMBUSTION EXHAUST
A fast-response zirconia sensor-based instrument has been developed to measure the air/fuel ratio (A/F) of combustion exhaust. This instrument uses a reduced-pressure sampling system which improves instrument response time (due to faster diffusion at lower pressures) and eliminates the need for a heated sample line. The measured response time of the described instrument is 170 ms (0-90%) for a step-change in oxygen concentration. The prototype instrument is easily calibrated in less than 2 min, requiring only nitrogen and room air for calibration. A complete description of the instrument is given. Results of tests comparing the instrument accuracy to a chemical balance technique are given. Also, a comparison study was conducted with the prototype instrument and a conventional zirconia sensor-based A/F monitor (Lamdascan, Sensors, Inc., Ann Arbor, Michigan) with respect to accuracy and response time.
- Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
- International Congress and Exposition, Detroit, Michigan, February 27-March 2, 1984.
Warrendale, PA United States 15096
- Butler, J W
- Haack, L P
- Colvin, A D
- McKelvy, F E
- Publication Date: 1984
- Features: Appendices; Figures; References; Tables;
- Pagination: 22 p.
- TRT Terms: Accuracy; Combustion; Emergency response time; Exhaust gases; Fuel air mixtures; Measuring instruments; Prototypes; Reaction time; Zirconium
- Uncontrolled Terms: Air fuel ratio
- Old TRIS Terms: Combustion products
- Subject Areas: Bridges and other structures; Safety and Human Factors;
- Accession Number: 00393012
- Record Type: Publication
- Source Agency: National Highway Traffic Safety Administration
- Report/Paper Numbers: SAE 840061, HS-037 636
- Files: HSL, USDOT
- Created Date: Feb 28 1985 12:00AM