Regeneration controller for exhaust purifying apparatus of internal combustion engine

摘要

A regeneration controller for an exhaust purification apparatus ( 36, 38 ) of an engine ( 2 ) that appropriately burns particulate matter accumulated in the exhaust purification apparatus. The regeneration controller includes an ECU ( 70 ) that determines, whether an estimated accumulation amount (PMsm) of particulate matter deviates from an actual accumulation amount. When the estimated accumulation amount is less than or equal to a maximum value (BUpm) and an exhaust pressure difference (DeltaP/GA) is greater than a replacement reference value (Dp) the ECU replaces the estimated accumulation amount with a greater replacement amount (UPpm). This causes the estimated accumulation amount to approach or to be the same as the actual accumulation amount.