Gasoline particulate filter applications for plug-in hybrid and traditional cars 2020-01-1430
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 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 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.
This paper compares GPF application development for a traditional BYD Tang ICE base model and a BYD Tang PHEV model. Same aftertreatment design with slightly different layout is used to cover both models to meet PM/PN/gas emission standards. GPF soot loading and burning behavior are compared. There are more challenges on soot management on PHEVs, but hybrid powertrain also offers more flexibility. An improved soot management scheme based on state of charge (SOC) is also discussed in the paper.
PHEV, ICE, GPF, Soot management, Application development, CN6