Patent ID: 6350416
Filing Date: 2002-02-26
Classification: B01D,F01N,Y02T

Abstract:
A system for exhaust gas purification disposed in the exhaust pipe of an internal combustion engine having a unitary pipe construction through which all of the exhaust gas entering the exhaust pipe continuously flows, which comprises:(A) an exhaust gas purifier comprising: (a) an adsorbent formed by loading, on a monolithic carrier, (1) a zeolite containing at least one kind of ion of an element having an electronegativity of 1.40 or more and (2) a catalyst material formed by loading at least one kind of noble metal selected from Pt, Pd and Rh on a heat resistant inorganic oxide, said zeolite and catalyst material being loaded on the monolithic carrier either in a mixed state or in a state of laminated layers, and (b) at least one loaded carrier formed by loading, on a monolithic carrier, a catalyst component having a purifiability for the harmful substances present in the exhaust gas emitted from the engine and/or an adsorbent component having an adsorptivity for the hydrocarbons also present in the exhaust gas, the loaded carrier being provided upstream of the adsorbent in the flow direction of the exhaust gas and having a total volume of 0.6 l or more (B) an exhaust pipe of an internal combustion engine having a unitary pipe construction through which all of the exhaust gas from the engine entering the exhaust pipe continuously flows, said exhaust gas purifier (A) located in said exhaust pipe (B).