Methodology for measuring exhaust aerosol size distributions using an engine test under transient operating conditions

摘要: A study on the sources of variability in measurement particle size distribution using a two-stage dilution system and an engine exhaust sizer was conducted to obtain comprehensive repeatable methodology that can be used measure aerosols emitted by light-duty diesel under transient operating conditions. The paper includes three experimental phases: validation method; evaluation influence sampling factors, such as pre-conditioning; effects conditions, ratio air temperature. An examination type degree each studied factor is presented, recommendations for reducing are given critical parameter values identified develop highly reliable could applied further studies effect parameters distributions.