Cooperative evaluation of techniques for measuring nitric oxide and carbon monoxide (Phase IV tests)

Joseph Manuel Sr Perez, L. C. Broering, J. H. Johnson

Research output: Contribution to conferencePaperpeer-review


This is the fourth in a series of tests conducted as a Coordinating Research Council cooperative program to evaluate the measurement methods used to analyze diesel exhaust gas constituents. A multi-cylinder engine was circulated to 15 participants who measured emissions at three engine conditions. All 15 participants measured nitric oxide and carbon monoxide with several laboratories measuring nitric oxide by both NDIR (Non-Dispersive Infrared) and CHEMI (Chemiluminescence). Some participants also measured carbon dioxide, nitrogen dioxide, oxygen, and unknown span gases. The test results are compared with the Phase III cooperative tests which involved simultaneous measurement of emissions by participants. The precision of the results was poorer in Phase IV than Phase III.

Original languageEnglish (US)
StatePublished - Dec 1 1975
EventAutomotive Engineering Congress and Exposition - Detroit, MI, United States
Duration: Feb 24 1975Feb 28 1975


OtherAutomotive Engineering Congress and Exposition
Country/TerritoryUnited States
CityDetroit, MI

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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