New Techniques for Measurement of Particulate Emission from Advanced Vehicles

In order to develop the engines that emit only small amount of Particulate Matter (PM), there are various demands for measurement techniques for PM, such as real-time measurement, low-mass measurement, and analysis in short time. This paper reviews two kinds of instruments that have been newly introduced for PM measurement. One is the real-time PM analyzer applying two Flame Ionization Detectors (FID). This method utilizes an area accumulation technique for spike-shaped signals that are observed when soot particles are fed into a FID detector. And Soluble Organic Fraction (SOF) can be calculated continuously from difference of signals of two detectors. Another is the low-mass PM analyzer based on process of vaporization, oxidization and deoxidization. The performances of these two measurement techniques are described in this paper, using model samples and actual particulate.