METHOD FOR DETERMINING HEAT-DETERIORATION OF PARTICULATE FILTER

摘要

PURPOSE: A method for diagnosis of deterioration of a particulate filter is provided to accurately measure deterioration of a particulate filter by spraying the fuel after regenerating the particulate filter. CONSTITUTION: A method for diagnosis of deterioration of a particulate filter coated with an oxidation catalyst is as follows. The deterioration of a particulate filter is diagnosed by calculating the heating efficiency because the fuel is sprayed after the particulate filter is completely regenerated(S220,S270,S230). A complete regeneration step of the particulate filter repetitively operates on a periodic basis. The fuel is sprayed when a set up time passes after the particulate filter is completely regenerated.