Diesel Exhaust Particle Size: Measurement Issues and Trends

Abstract
Exhaust particle number concentrations and size distributions were measured from the exhaust of a 1995 direct-injection diesel engine. Number concentrations ranged from 1 to 7.5 x 10⁷ particles/cm₃. The number size distributions were bimodal and log-normal in form with a nuclei mode in the 7-15 nm d