Characterization of Real-Time Particle Emissions from a Gasoline Direct Injection Vehicle Equipped with a Catalyzed Gasoline Particulate Filter During Filter Regeneration

摘要: Real-time solid particle number (PN), size distributions, black carbon (BC), and particulate matter (PM) mass measurements were obtained from a gasoline direct injection (GDI) vehicle with without catalyzed filter (GPF) over the US Federal Test Procedure 75 (FTP-75) US06 Supplemental (US06) drive cycles. The organic elemental fractions of carbonaceous PM transmission electron microscope (TEM) images for exhaust particles examined. Particles emitted GDI various moderate driving conditions have similar morphology, size, composition. These accumulation mode diameters 50 to 90 nm, comparable fractal structures diesel particles, contain mostly BC little materials. Under aggressive conditions, many nanoparticles (<20 nm in diameter) are particles. Over FTP-75 optimized GPF reaches filtration efficiency 90 % clean condition rapidly remains unchanged as regeneration was not observed. condition, triggered by high temperature during which smaller than 30 nm formed downstream GPF. TEM image analysis suggests that collected layer semi-volatile materials on aggregate surface while nature. During regeneration, still