Patent ID: 7174708
Filing Date: 2007-02-13
Classification: F01N,F02D,Y02T

Abstract:
1. Method of backwashing by heating a particulate filter (F) for purifying exhaust gases (G) from an internal combustion engine (M), in particular an internal combustion engine equipping an automobile vehicle (V), wherein starting of a heating means ( 1 ) of the filter (F) is commanded when said engine (M) is delivering an engine torque below a predetermined bottom threshold (C bottom ), said heating means comprising at least one ceramic igniter adapted to heat, by direct contact, particles deposited on a filter body of said filter (F) and adapted to reach a temperature of 1000° C. within 3 to 6 seconds, wherein starting of said heating means ( 1 ) is commanded after said engine (N) has delivered an engine torque exceeding a top threshold (C top ) for at least a predetermined time period.