EXHAUST GAS PURIFYING DEVICE FOR DIESEL ENGINE WITH EXHAUST GAS RECIRCULATION LINE

摘要

The present invention relates to an exhaust gas purifying device for a diesel engine, more particularly, the present invention provides an exhaust gas purifying device for a diesel engine, in which a nitrogen oxides reducing (DeNOx) catalyst unit and a diesel particulate filter (DPF) unit are provided successively from an upstream of exhaust gas flow, a diesel fuel injector is provided at a front end portion of the nitrogen oxides reducing catalyst unit, and an exhaust gas recirculation (EGR) line is provided for entering a portion of exhaust gas from a rear end of the diesel particulate filter unit to an intake manifold of an engine. The exhaust gas purifying device of the present invention has an excellent nitrogen oxides reduction performance and a superior efficiency of removing particulate matter, carbon monoxide and hydrocarbon.