Patent ID: 7694509
Filing Date: 2010-04-13
Classification: F01N,F02D,Y02T

Abstract:
1. A method for regenerating a particle filter built into an exhaust line of an internal combustion engine, with the exhaust gases passing through the filter from an inflow face to an outflow face, characterized in that comprising the steps of, during filter regeneration: monitoring the internal temperature of at least two regions within the filter between the inflow face and outflow face is monitored; operating a control unit to receive the internal temperatures of the at least two regions within the filter and to command the internal combustion engine to operate in rich mode to reduce the oxygen level of the exhaust gases when at least one of the temperatures monitored is greater than a critical temperature and to command the internal combustion engine to operate in lean combustion mode to provide an increased oxygen level of the exhaust gases when all the temperatures monitored are less than the critical temperature; reducing the oxygen level of the exhaust gases when at least one of the temperatures monitored is greater than a critical temperature; and continuing to provide an increased oxygen level of the exhaust gases to continue filter regeneration when all the temperatures monitored are less than the critical temperature.