Measurement of Primary Exhaust Particulate Matter Emissions from Light-Duty Motor211 Vehicles

摘要

An in-use fleet of 60 gasoline-fueled and 8 diesel-fueled vehicles was evaluated211u001eto characterize primary particulate exhaust emissions. The candidate vehicles 211u001eincluded light-duty passenger cars and trucks, and passenger trucks with heavy-211u001eduty engines. The six visibly smoking gasoline-fueled vehicles were chosen from a 211u001epool of over 30 smoking vehicles becuase they emitted smoke during virtually all 211u001eoperating conditions (idle, acceleration, deceleration, and cruise). Primary 211u001eparticulate exhaust emission samples were characterized for total mass emission 211u001erate, PM-10, PM-2.5, organic and elemental carbon fraction, trace elements, 211u001esulfates, nitrates, and the presence of select polynuclear aromatics, hopanes, 211u001eand steranes. In addition, particle mass size distribution and particle number 211u001econcentration were measured for a subset of vehicles. Gaseous and particulate 211u001eexhaust emissions were evaluated using the Federal Test Procedure (FTP).