DIESEL PARTICULATE TRAP OF PERFORATED TUBES WRAPPED WITH CROSS-WOUND INORGANIC YARN TO FORM FOUR-SIDED FILTER TRAPS

摘要

An efficient, economical, compact diesel particulate filter comprising a casing comprising a plurality of perforated, supported, rigid tubes wherein the perforated surface of each tube is covered by a filtering element comprising substantially helically cross-wound inorganic yarn, and wherein the yarn is cross-wound to provide four-sided openings.