Patent ID: 8117832

Claim:
An exhaust treatment device comprising: an exhaust component body having an inlet end and an outlet end, the inlet end of the body being enclosed by an end cap, an inlet pipe extending through the end cap, the inlet pipe defining an outer end protruding outwardly from the exhaust component body, an inner end extending into the exhaust component body, and an interior defined between the outer end and the inner end, the inner end of the inlet pipe being covered by a flow dispersion plug that includes a plurality of flow dispersion openings; a catalytic converter positioned within the body; a diesel particulate filter positioned within the body; and an electric heater for regenerating the diesel particulate filter, the electric heater including: a heating element positioned between the diesel particulate filter and the catalytic converter so that a downstream face of the catalytic converter is spaced a distance ranging from 1 to 4 inches from an upstream face of the heating element so that the catalytic converter stores heat to heat combustion air that flows to the diesel particulate filter and directs heat back towards the diesel particulate filter; a coupler adapted to connect a power line of an offboard shore station to the heating element; wherein the catalytic converter is constructed such that in use the ratio of NO 2 to NO x in the exhaust gas between the catalytic converter and the diesel particulate filter is no more than 20 percent greater than the ratio of NO 2 to NO x in the exhaust gas upstream from the catalytic converter; and an air injector separate from the inlet pipe for providing combustion air into the exhaust component body during regeneration of the diesel particulate filter, the air injector including an air inlet end in fluid communication with a source of air that is exterior of the exhaust component body and an air discharge end located within the interior of the inlet pipe such that air from the discharge end is injected into the interior of the inlet pipe in a direction toward the plurality of flow dispersion openings.