Abstract
Due to their fuel economy, gasoline direct injection (GDI) vehicles are expanding their share of the market. However, different from traditional port fuel injection (PFI) gasoline vehicles, GDI engines emit considerably more particulate matter (PM). By considering that more stringent regulation is setting in the world for gasoline vehicles, a filter for gasoline soot will be needed even in Japan, which is called a gasoline particulate filter (GPF). In this study, using carbon particles as model soot, we have evaluated the filtration performance of SiC sponge potentially applied for GPF. Here, effects of the filter thickness, the pore size, and the porosity on the filtration efficiency were investigated, so that the condition for reducing the pressure drop with keeping the better filtration efficiency would be revealed.
