Cooperative Evaluation of Techniques for Measuring Nitric Oxide and Carbon Monoxide in Diesel Exhaust Phase IV Test Results,

摘要

This is a fourth in a series of tests conducted as a Coordinating Research Council,Inc. (CRC) cooperative program to evaluate the measurement methods used to analyze diesel exhaust gas constituents. A multi-cylinder engine was circulated to fifteen participants who measured emissions at three engine conditions. All fifteen 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 oxide,and oxygen and 'Unknown'span gases. These test results were 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 (PB-206 730).