EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine capable of securing combustion stability in low-speed high-load operation and efficiently realizing a decrease in the discharge of toxic substance and the early activity of a catalyst. SOLUTION: This exhaust emission control device for the internal combustion engine is provided with an exhaust flow control means for suppressing exhaust flow within an exhaust system at the start of the internal combustion engine; a starting acceleration initial state detecting means for detecting a vehicle to be within a prescribed period after starting acceleration based on the operating state of the internal combustion engine (S14); and exhaust flow control limiting means for suspending or reducing suppression of exhaust flow by the exhaust flow control means (S16, S18, S30) while the vehicle is detected to be within the prescribed period after starting acceleration by the starting acceleration initial state detecting means. COPYRIGHT: (C)2004,JPO&NCIPI