POSITIVE IGNITION ENGINE AND EXHAUST SYSTEM COMPRISING THREE-WAY CATALYSED FILTER Russian patent published in 2018 - IPC F01N3/35 B01D53/94 

FIELD: separation.

SUBSTANCE: system contains a filter for filtering particulate matter from exhaust gas emitted from the vehicular positive ignition internal combustion engine, which filter comprises a porous substrate having inlet surfaces and outlet surfaces, wherein the porous substrate is coated at least in part with a three-way catalyst washcoat comprising a platinum group metal and a plurality of solid particles, wherein the plurality of solid particles comprises at least one base metal oxide and at least one oxygen storage component which is a mixed oxide or composite oxide comprising cerium, obtained from sol, wherein the mixed oxide or composite oxide comprising cerium and/or the at least one base metal oxide has a median particle size (D50) less than 1 mcm and wherein the platinum group metal is selected from the group consisting of: (a) platinum and rhodium; (b) palladium and rhodium; (c) platinum, palladium and rhodium; (d) only palladium or (e) only rhodium.

EFFECT: positive ignition engine comprises an exhaust system for a vehicular positive ignition internal combustion engine.

18 cl, 2 dwg, 2 tbl