GASOLINE PARTICULATE FILTER FOR GASOLINE DIRECT INJECTION ENGINE

摘要

The present invention relates to a gasoline particulate filter for a gasoline direct injection engine and more specifically, to a gasoline particulate filter (GPF) for a gasoline direct injection (GDI) engine, wherein the position and amount of coating of a catalyst to be coated along the lengthwise direction of a cell in the gasoline particulate filter is controlled to improve contact properties with exhaust gas and catalyst ingredients, thereby improving conversion efficiency and reducing engine pressure loss due to the exhaust gas. The gasoline particulate filter for the gasoline direct injection engine comprises: a plurality of through-cells (12', 12") defined and partitioned by porous cell walls (13), and two ends (15) on an inlet side (9a) and an outlet side (9b) are plugged in a staggered way, wherein a first catalyst coating layer (30) is formed on the front half portion of a cell wall surface of an inlet-side open cell (12'), and a second catalyst layer (30') is formed on the back half portion of an inner cell wall of an outlet-side open cell (12").