DYNAMIC MEASUREMENT OF CARBON MONOXIDE CONCENTRATIONS IN AUTOMOTIVE EXHAUST USING INFRARED DIODE LASER SPECTROSCOPY

Infrared diode laser spectroscopy was used to make the first measurements of carbon monoxide (CO) concentration in automotive exhaust with a time response fast enough to be useful in the analysis of engine and emission control system dynamics. Carbon monoxide concentrations were measured before and after a three-way catalytic converter. The response time of the laser system (for a change in amplitude of 10%-90% of fullscale) was 25 ms, more than adequate to resolve all CO transients of interest. The instrument was capable of resolving concentration changes on the order of 0.1 vol % before the catalyst and 0.02 vol % after it. A minicomputer was used to simultaneously collect data on CO concentrations before and after the catalyst, and also the output of an oxygen sensor located in the exhaust line.

  • Corporate Authors:

    Society of Automotive Engineers

    400 Commonwealth Drive
    Warrendale, PA  USA  15096
  • Authors:
    • Sell, J A
    • HERZ, R K
    • MONROE, D R
  • Publication Date: 1980-2

Media Info

  • Pagination: 7 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00315092
  • Record Type: Publication
  • Report/Paper Numbers: SAE 800463
  • Files: TRIS
  • Created Date: Oct 8 1980 12:00AM