METHODS FOR CONTROLLING THE OPERATION OF A PARTICULATE FILTER

摘要

A method of controlling the operation of a particulate filter ( 111 ) in an exhaust gas after-treatment system ( 100 ) may comprise calculating a ratio of particulate loading rate to filter regeneration rate using a mass -based soot load estimation scheme and comparing the ratio of particulate loading rate to filter regeneration rate to a predetermined threshold value. The method further comprises controlling operating conditions of the particulate filter to maintain the ratio of particulate loading rate to filter regeneration rate at a value above the predetermined threshold value to maintain a soot cake layer along substantially the entire length of the particulate filter.