Exhaust gas recirculation and processing device for turbocharged diesel engine

摘要

An exhaust gas recirculation and processing device for a turbocharged diesel engine. A reactor comprises an inner chamber substantially surrounded by an outer chamber. Within the inner chamber, compressed air from the turbocharger mixes with engine exhaust gases discharged through the turbocharger. The mixture is heated and reacts to combust pollutants as it passes by a copper tube and baffle within the inner chamber. The reacted mixture exits the inner chamber and enters the outer chamber with which it communicates through apertures in a separating wall; from the outer chamber the reacted mixture is conducted to the engine intake. The copper tube and baffle are heated to within an optimal temperature range by directing gaseous engine combustion products through the copper tube. A heat exchanger thermally coupled to the reactor exchanges heat between the reactor and the engine cooling system to maintain reactor temperature. The gaseous discharge from the copper tube is directed to the engine exhaust pipe during engine cold start, and is diverted toward the reactor inner chamber when the engine warms up.