Patent ID: 8919105
Filing Date: 2014-12-30
Classification: B01D,F01N

Abstract:
1. A DPF regeneration control device for a diesel particulate filter (DPF) that is provided in an exhaust passage and collects exhaust gas particulate matter (PM), the DPF regeneration control device comprising: a forcible regeneration unit which forcibly regenerates the PM collected in the DPF; a differential pressure detection unit which detects a differential pressure between a front and a rear of the DPF; a DPF differential pressure setting unit which sets a DPF differential pressure generated in accordance with a total accumulated amount of soot and ash in advance through an experiment or a calculation, sets a DPF differential pressure generated when an ash accumulation amount corresponds to an accumulation amount at which washing is required, as a washing request threshold, and sets a DPF differential pressure generated when the ash accumulation amount is larger than the accumulation amount at which washing is required such that a reduction in output is necessary, as an output reduction threshold; a washing request issuing unit which determines whether or not the DPF differential pressure has reached the washing request threshold and outputs a washing request when the DPF differential pressure has reached the washing request threshold; and an output reduction warning unit which determines whether or not the DPF differential pressure has reached the output reduction threshold, which is larger than the washing request threshold, and issues an output reduction warning when the DPF differential pressure has reached the output reduction threshold.