December 3, 2010

Abstract

As regulatory limits for heavy-duty diesel engines introduce dramatic reductions in PM (Particulate Matter) emissions, there is considerable interest in new emission metrology that can more accurately measure low PM levels. One such metrology, particle number measurement, has been extensively investigated in Europe as part of Europe’s Particle Measurement Program (PMP). This program has put forth a new methodology, including instrument specifications and sampling protocols, for “solid” particle number measurements. While counting only solid particles results in better precision, it may not be fully indicative of the diesel PM exhaust components of interest from a health effects perspective. The PMP protocol still represents a significant advancement as it is currently the only methodology with low enough detection limits to produce precise measurements of Diesel Particulate Filter (DPF) equipped engines. Evaluation study of the diesel particle counting method will be presented.

Heejung Jung received his Ph.D. from the University of Minnesota, and received both his M.S. and B.S. degrees from Seoul National University in Mechanical Engineering. Upon completion of his masters, he joined Hyundai Motor Company as a research engineer. Dr. Jung later completed his postdoc research at UC Davis before joining current position at UC Riverside. Dr. Jung's current research focus areas are diesel PM emissions and particle emissions from various combustion sources.