Patent ID: 6907873

Claim:
A filter control method that estimates the quantity of particulates deposited in a filter for trapping diesel particulates based on pressure differential across the filter and/or on an integrated value obtained by integrating, with consideration to an engine operating condition, a given quantity of particulate generation per unit time, and conducts filter regeneration control, which filter control method is characterized in that it comprises: a step of acquiring, based on the pressure differential across the filter, an increase in quantity of particulates during a prescribed period as a first particulate increase quantity and acquiring, based on the integrated value, a second particulate increase quantity; a step of deriving from the first and second particulate increase quantities correction data for correcting the integrated value; and a step of using the correction data to correct the integrated value to acquire a corrected integrated value, and in that it conducts regeneration control of the filter using the corrected integrated value or the pressure differential across the filter.