EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

An exhaust purification system of an internal combustion engine which is controlled so that a combustion air-fuel ratio becomes lean at the time of ordinary operation, provided with an adsorption part 51 which adsorb unburned fuel which is contained in exhaust gas and an oxidation part 52 which has catalyst particles of a metal which oxidizes carbon monoxide. The adsorption part 51 includes zeolite 61 which substantially adsorbs the lower olefins which are contained in the exhaust gas. The adsorption part 51 and the oxidation part 52 are arranged so that the exhaust gas contacts the adsorption part 51, then contacts the oxidation part 52.