초록 ▼

An exhaust emission control apparatus for a Diesel engine includes a filter collecting particulates contained in exhaust gases of the Diesel engine and a fuel supply device supplying fuel required for burning the collected particulates. The fuel supply device controls the amount of supplied fuel so

An exhaust emission control apparatus for a Diesel engine includes a filter collecting particulates contained in exhaust gases of the Diesel engine and a fuel supply device supplying fuel required for burning the collected particulates. The fuel supply device controls the amount of supplied fuel so that the temperature of the filter can be raised to a level high enough for burning the collected particulates but not so high as to damage the filter itself by the heat applied thereto. A control unit executes the fuel control on the basis of the temperature of the filter and the pressure drop across the filter.

대표청구항 ▼

For use in an exhaust emission control apparatus for a Diesel engine having a filter collecting particulates contained in exhaust gases of the diesel engine, a fuel supply device for supplying fuel for causing combustion of particulates collected by said filter during a filter regeneration cycle com

For use in an exhaust emission control apparatus for a Diesel engine having a filter collecting particulates contained in exhaust gases of the diesel engine, a fuel supply device for supplying fuel for causing combustion of particulates collected by said filter during a filter regeneration cycle comprising: fuel jet means for emitting fuel repeatedly and intermittently from a nozzle toward said filter during a combustion interval prescribed for said filter regeneration cycle; air jet port means, disposed adjacent to said nozzle, for atomizing fuel emitted by said fuel jet means; air supply means for causing pulsating air to be supplied from said air jet port means during said combustion interval prescribed for said filter regeneration cycle; and control means, coupled to siad fuel jet means, for controlling the repeated and intermittent emission of fuel by said fuel jet means so as to maintain the temperature of said filter at a prescribed level, thereby effecting combustion of particulates collected by said filter during said filter regeneration cycle.