FILTER CONTROL METHOD AND DEVICE

摘要

Increase in quantity of particulates during a prescribed time period is acquired as first difference data (DX) that is based on pressure differential DeltaP across a filter ( 32 ) and derived from first estimation data (D 2 ) obtained from a first estimation calculator ( 52 ) and is simultaneously acquired as second difference data (DY) that is based on integration of the quantity of particulate generation per unit time and derived from second estimation data (D 3 ) obtained from a second estimation calculator ( 53 ), and the second estimation data (D 3 ) is corrected using correction data (D 4 ) calculated from the first and second difference data (DX, DY) to acquire corrected second estimation data (D 6 ). A discriminator ( 73 ) determines which of the first estimation data (D 2 ) and corrected second estimation data (D 6 ) is suitable data and the regeneration control of the filter is conducted using the so-selected estimation data (Q).