EXHAUST GAS EMISSION CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide an exhaust gas emission control system for an internal combustion engine, which is enabled to suppress the deterioration of a catalyst of a second honeycomb structure by flowing the exhaust gas homogeneously in the radial direction of a second honeycomb carrying a catalyst.SOLUTION: An exhaust gas emission control system 13 comprises a honeycomb structure 7 so accommodated in a catalyst case 5 as is positioned on the downstream side with respect to a first honeycomb structure 6 and as carries a catalyst on the wall faces of a plurality of cells 11 defined by a porous partition 9 and forming a passage, through which the exhaust gas flows. The first honeycomb structure 6 is formed at a radially central part with a sealing part 12 for preventing the exhaust gas from flowing to the downstream side.