OXIDATION CATALYST COMPOSITION, EXHAUST GASES FLOW PROCESSING AND EXHAUST GASES FLOWING PROCESSING

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FIELD : engine building. SUBSTANCE : invention relates to an oxidation catalyst composition, a method and a system for treating emissions of exhaust gases from a diesel engine. Composition of the oxidation catalyst includes a first "washcoat", comprising a zeolite, a Pt component and a first refractory metal oxide substrate containing manganese, second coating of "washcoat" type, comprising a second substrate of refractory metal oxide, Pt-component and Pd-component at weight ratio Pt : Pd, which is in range from 10 : 1 to 1 : 10, and third coating of "washcoat" type, including palladium and rare-earth element oxide component. EFFECT : technical result is reduction of carbon monoxide and improvement of oxidation of NO. 33 cl, 7 dwg, 5 ex, 4 tbl