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.

  • Availability:
  • Supplemental Notes:
    • International Congress and Exposition, Detroit, Michigan, February 27-March 2, 1984.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Butler, J W
    • Haack, L P
    • Colvin, A D
    • McKelvy, F E
  • Publication Date: 1984

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 22 p.
  • Serial:

Subject/Index Terms

Filing Info

  • 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