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Diesel particle filters (DPF) have become a standard aftertreatment component for all current and future on-road diesel engines used in the US. In Europe the introduction of EUVI is expected to also result in the broad implementation of DPF's. The anticipated general trend in engine technology towards higher engine-out NOx/PM ratios results in a somewhat changing set of boundary conditions for the DPF predominantly enabling passive regeneration of the DPF. This enables the design of a novel filter concept optimized for low pressure drop, low thermal mass for optimized regeneration and fast heat-up of a downstream SCR system, therefore reducing CO₂ implications for the DPF operation. In this paper we will discuss results from a next-generation cordierite DPF designed to address these future needs.

Plug-in hybrid electric vehicles (PHEVs) and battery electric vehicles (BEVs) are considered as primary paths in China to meet corporate average fuel consumption (CAFC) credit and new energy vehicle (NEV) credit regulations. Many local original equipment manufacturers (OEMs) develop PHEVs based on their internal combustion engine (ICE) base models without significant modification on engine side. Traditional ICE vehicles are solely driven by engines, while PHEVs can be driven by engine or electric motors, independently or together, depending on powertrain architecture and operating strategy. PHEVs may have more particle number or particulate matter (PN/PM) emissions. To meet CN6 regulation, gasoline particulate filters (GPFs) are widely used for both PHEV and traditional cars. It is important to investigate the impacts of hybrid powertrain on gasoline particulate filter applications.