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
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