VEHICLE PARTICULATE ANALYSIS METHOD AND APPARATUS

摘要

A method and apparatus for characterizing particulate matter in gases (14) emitted from the exhaust tailpipe of a moving vehicle includes providing a micro-dilution device (46) on the vehicle and, while the vehicle is moving, retrieving samples of the gases and mixing the samples with ambient air with the micro-dilution device (46), thereby forming diluted samples of the gases containing volatile and non-volatile particulate matter. A particulate analyzer (60) is provided on the vehicle which measures at least one parameter of the volatile and non-volatile particulate matter.