An Investigation of the Effect of Differing Filter Face Velocities on Particulate Mass Weight from Heavy-Duty Diesel Engines 960253

Due to continuing reductions in EPA's emission standard values for exhaust particulate emissions, industry production has shifted towards engines that produce very low amounts of particulate emissions. Thus, it is very possible that future engines will challenge the error range of the current instrumentation and procedures used to measure particulate emissions by being designed to produce extremely low levels of particulates.
When low particulate emitting engines are sampled at low flowrates, the resulting filter loadings may violate the minimum filter loading recommendation in the Heavy Duty Federal Test Procedure [1]. Conversely, higher flow rates may be an inappropriate option for increasing filter loading due to the possibility of stripping volatile organic compounds from the particulate sample or otherwise artificially reducing the accumulated mass [2]. Thus, it is necessary to determine the applicability of the current heavy duty particulate testing procedures to low particulate emission rate engines.
The primary aim of this work is to evaluate the effect of filter face velocity (FFV) on the weight of particulate collected during a standard engine emissions test. In particular, an attempt will be made to determine a flow range that will maximize filter loading but not strip volatile organic compounds from the particulate sample. Filter face velocity is varied by changing filter face area and size of filter. Engine operating conditions are varied over a wide variety of typical operating conditions. Statistical analyses will be used to describe the data and make conclusions about the effect of flow rates on the accuracy of measuring the amount of particulate matter collected as well as on optimal flow rates.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 17% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Quick Connect Coupling Specification for Liquid Fuel and Vapor/Emissions Systems


View Details


Physical Size Distribution Characterization of Diesel Particulate Matter and the Study of the Coagulation Process


View Details


The Oxidation of NO to Yield NO2 in Emissions Testing Sample Bags


View Details