catalyst system reducing NOx for gasoline GDI/lean burn engine

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for reducing exhaust gas, and particularly for gasoline lean burn engines and direct injection engines, regenerative catalysts and NOx removal can be effectively removed. Regeneration of catalysts is characterized by the combination of thin-wall carriers, including conventional carriers, such as electrically heated catalysts (EHCs) and close coupled catalysts (CCCs). Alternatively, the present invention provides a catalyst system that can effectively reduce NOx and improve durability by using an electrically heated catalyst or optimization of a cloth coupled catalyst for desulfurization.