EXHAUST EMISSION CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To accurately seize a quantity of ash remaining in a filter.

SOLUTION: This exhaust emission control device 30 regenerates the filter 32 by detecting longitudinal differential pressure ΔP of the filter 32 for collecting a particulate, and determines the time as the regeneration finished timing of the filter 32 when a temperature of an outlet part of the filter 32 becomes lower than a temperature of an inlet part (ΔT > M) by using a first temperature sensor 36 and a second temperature sensor 37 when regenerating the filter, and allows the proper replacement of the filter 32 by outputting a replacement warning signal K3 when an estimated ash residual quantity becomes a prescribed value PX or more by estimating an ash residual quantity in the filter 32 from a value of the longitudinal differential pressure ΔP in this regeneration finishing timing.

COPYRIGHT: (C)2004,JPO