DENITRATION DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

PURPOSE:To reduce nitrogen oxides NOX in exhaust gas on a catalyst layer on a catalyst support by reducer without generating ammonium sulfate acid in the case where sulfur content is included in fuel by utilizing a position and a timing in which an exhaust temperature is high sufficiently. CONSTITUTION:The denitration device for an internal combustion engine is formed in such constitution that a denitration device 40 is arranged per exhaust passage of each cylinder, and also reducer for reducing NOX in exhaust gas is added in the exhaust pipe simultaneously with opening of an exhaust valve 1.