EXHAUST EMISSION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

An exhaust emission control device of an internal combustion engine capable of suppressing deterioration in fuel efficiency by detecting a forced regeneration timing accurately and keeping a wide interval of forced regeneration. The exhaust emission control device comprises a filter (22) provided in the internal combustion (2) and trapping particulates in exhaust gas, and a functional section (21) provided in the exhaust system on the filter or on the upstream thereof and producing NO2. An exhaust quantity operating means A1 operates the exhaust quantity Me of particulates based on the excess air rate lambda. A combustion quantity operating means A2 operates the combustion quantity Mb of particulates based on the exhaust gas temperature on the upstream of the filter or the filter temperature. Furthermore, a deposition quantity operating means A3 operates the deposition quantity Ma of particulates based on the exhaust quantity Me of particulates and the combustion quantity Mb of particulates.