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原文传递 Measurement Allowance Project On-Road Validation.

题名：	Measurement Allowance Project On-Road Validation.
作者：	miller, j. w.
关键词：	air pollution control,emission,diesel engines/gases, measurement, laboratory methods, testing, monte carlo method, regulations, temperature, elevation, calibration, vehicles, statistics, oxides, nitrogen, particulates, air quality/
摘要：	Regulations were promulgated requiring the measurement of emissions from diesel engines while operating within the No-To-Exceed (NTE) control area of the engine map. These measurements require the use of portable emissions measurement systems (PEMS) rather than traditional laboratory methods. To provide input into the determination of a measurement 'allowance' that would account for differences between a laboratory measurement and PEMS, a comprehensive Measurement Allowance testing project was set-up and governed by the Measurement Allowance Steering Committee (MASC). In the first phase of the project emissions measured with PEMS and federal reference were compared for an engine on a dynamometer while the environmental conditions were changed for the PEMS unit. These data were fitted to a Monte Carlo model. In a second phase, the goal was to compare the measurements from PEMS with federal reference methods during actual in-use driving using the University of California, Riverside (UCR) Bourns College of Engineering-Center for Environmental Research and Technology's (CE-CERT) Mobile Emissions Laboratory (MEL). Prior to the on-road testing portion, MEL underwent an audit following 40CFR Par 1065 and a side-by-side comparison with emissions measured at the SwRI laboratory. Results were viewed to be comparable. This report focuses on the on-road comparison of the PEMS measuring in the raw exhaust with gaseous instruments measuring flow and concentrations from a full dilution tunnel according to the Code of Federal Regulations (CFR). / NOTE: Final rept. / Supplementary Notes: Sponsored by California State Air Resources Board, Sacramento. Research Div. and California Environmental Protection Agency, Sacramento. / Availability Note: Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
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