TY - JOUR
T1 - Uncertainties in filter mass measurements made to determine compliance with the 2007 diesel PM standard
AU - Swanson, Jacob
AU - Kittelson, David B
AU - Dikken, David
PY - 2009
Y1 - 2009
N2 - The 2007 Diesel particulate matter (DPM) standard of 0.01 g/bhp-hr represents a 90% reduction of the previous standard and corresponds to roughly 100 micrograms (μg) gained on the filter sample used to determine compliance. The factors that influence the accuracy and precision by which this filter can be weighed are analyzed and quantified. The total uncertainty, representing best and typical cases, is between 1 and 5 μg. These uncertainties are used to compute the total uncertainty of the brake specific emission calculation. This uncertainty also depends on flowrate uncertainty, face velocity, and secondary dilution ratio. For a typical case, the total fractional uncertainty is in the range of ~5 - 70% at 10% of the standard and ~1 - 10% at 90% of the standard.
AB - The 2007 Diesel particulate matter (DPM) standard of 0.01 g/bhp-hr represents a 90% reduction of the previous standard and corresponds to roughly 100 micrograms (μg) gained on the filter sample used to determine compliance. The factors that influence the accuracy and precision by which this filter can be weighed are analyzed and quantified. The total uncertainty, representing best and typical cases, is between 1 and 5 μg. These uncertainties are used to compute the total uncertainty of the brake specific emission calculation. This uncertainty also depends on flowrate uncertainty, face velocity, and secondary dilution ratio. For a typical case, the total fractional uncertainty is in the range of ~5 - 70% at 10% of the standard and ~1 - 10% at 90% of the standard.
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U2 - 10.4271/2009-01-1516
DO - 10.4271/2009-01-1516
M3 - Article
AN - SCOPUS:77953142647
SN - 1946-3952
VL - 2
SP - 708
EP - 717
JO - SAE International Journal of Fuels and Lubricants
JF - SAE International Journal of Fuels and Lubricants
IS - 1
ER -