N. Gajarlawar, G. Amba Prasad Rao,
Volume 2, Issue 3 (7-2012)
Abstract
The current regulated particle metric in vehicle emissions is the total mass, while during last decade
interest in number size distribution has increased. Various international studies on epidemiology and
toxicology have reported the adverse effect of the particle matter on public health. The UNECE group of
experts on pollution and energy (GRPE) under particle measurement program (PMP) are under the process
of finalization long term certification standard concerning particle emissions. The current study was done in
order to investigate the number concentration from a range of Indian multi utility vehicles. These were
equipped with various sizes of diesel engine over the new European driving cycle (NEDC) cycle using
same oil specification. The vehicles chosen were meeting emission norms ranging from Euro3 (E-3) to
Euro5 (E-5) and using the corresponding fuel specification as specified for the norms. In order to meet the
strict emission norms, penetration of common rail injection system in the Indian market is inevitable. The
use of higher injection pressure, advanced after treatment systems such as diesel particle filters (DPF), is
the motivation for the work to access the number concentration, an important metric of particle matter in
view of future emission norms. It is clearly revealed that different vehicles equipped with different capacity
engines exhibits similar diesel particle emission characteristics. Also, as the particle mass is decreasing
with the stringent emission norms reduces the particle number concentration.
