AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
Development of Sheathless Particle Classifier with Electrometer
HIROYUKI YAMADA, Hiroshi Okuda, National Traffic Safety and Environment Laboratory
Abstract Number: 558 Working Group: Instrumentation and Methods
Abstract A nano-aerosol monitor (NAM) which is a combination of a classifier based on new concept and electrometer has been developed. The classifier of NAM does not require the sheath flow which may decrease a sensitivity. Since the electrometer is in favor of using under the vibrating conditions, the NAM can be applicable to PN-portable emission measurement system (PEMS). It was confirmed that the NAM can classify particles as expected with sodium chlorite particles with 23 nm. The equality of data by the NAM and PMP methodology was confirmed with exhausts from recent automobiles with chassis dynamometer and constant volume sampler (CVS). As for tested vehicles, a gasoline direct injection passenger car and two diesel heavy duty trucks with DPF were selected. In all cases, the profiles by the NAM were similar to those by PMP methodology and exhibited linear correlation to the PMP methodology even in various test modes. The NAM does not have a volatile particle remover (VPR) which is equipped with the PMP methodology to remove the volatile particle. Therefore, in the exhausts from recent vehicles, ratios of volatile particles seem to be a constant in various conditions, and it is possible to obtain similar data with the PMP methodology by the particle measurement system which does not have the VPR.