Abstract: A soot accumulation amount estimation method for an exhaust gas purification filter according to the present invention includes: a first step of burning soot collected in pores of the exhaust gas purification filter (22) to regenerate the filter (22); a second step of detecting a temperature of exhaust gas flowing into the filter (22), to judge whether or not the exhaust gas temperature is equal to or lower than a predetermined temperature at which a soot amount flowing into the filter (22) is substantially equal to a soot amount to be burnt in the filter (22); a third step of adding up a period of time during which the exhaust gas temperature is equal to or lower than the predetermined temperature, when the exhaust gas temperature is equal to or lower than the predetermined temperature, when the a fourth step f judging whether or not the added up period of time is equal to or longer than a period of time during which a predetermined amount of soot is accumulated in the pores after the first step; and a fifth

Abstract: A system for exhaust gas purification disposed in the exhaust pipe of an internal combustion engine, includes 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, and 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.