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公开(公告)号:US20220152589A1
公开(公告)日:2022-05-19
申请号:US17594694
申请日:2020-06-26
发明人: Andrew CHIFFEY , Kieran John COLE , Oliver COOPER , Christopher DALY , Lee GILBERT , Robert HANLEY , David MICALLEF , Francois MOREAU , Paul PHILLIPS , George PLATT
摘要: A composite oxidation catalyst (18, 20) for use in an exhaust system for treating an exhaust gas produced by a vehicular compression ignition internal combustion engine (30) and upstream of a particulate matter filter (44, 50) in the exhaust system comprises a substrate (5) having a total length L and a longitudinal axis and having a substrate surface extending axially between a first substrate end (I) and a second substrate end (O); and three or more catalyst washcoat zones (1, 2, 3; or 1, 2, 3, 4) arranged axially in series on and along the substrate surface, wherein a first catalyst washcoat zone (1) having a length L1, wherein L1