Measurement of total hydrocarbon emissions with MEMS using a portable FID and a novel exhaust flow meter


The objective of this study was to evaluate tools for in-field, on-board engine emissions measurements, namely, a Signal Model 3030PM hydrocarbon analyzer and McCrometer\u27s V-Cone flow meter. The Signal Model 3030PM analyzer uses a heated flame ionizing detection scheme to measure hydrocarbons. The V-Cone is an obstructive, differential pressure flow meter that reshapes the flow profile, therefore conditioning the flow.;The Signal Model 3030PM analyzer was found to perform as well or better than the HC analyzers currently used in the FTP test cell. Besides the portability feature, the Signal Model 3030PM demonstrated better response, being able to capture the high and low concentrations better.;When compared with an AnnubarRTM flow meter, the V-Cone measured consistently higher than the AnnubarRTM for the flow rates and this translated into higher mass rates. After recalculating the V-Cone values using the correction factor, the V-Cone had integrated errors of less than 5% for transient tests and 10% for steady state tests when compared to the Annubar

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