EXHAUST SYSTEM COMPRISING NOx STORAGE CATALYST AND CSF
AssigneeJohnson Matthey Public Limited Company
InventorsAndrew Francis Chiffey, Gavin Michael Brown
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Abstract
An exhaust gas aftertreatment system for a diesel-engined vehicle, which system comprising a NOx Storage Catalyst (NSC) followed in a downstream direction by a Catalysed Soot Filter (CSF), wherein the CSF comprises an oxidative catalyst comprising a palladium-rich weight ratio of platinum and palladium.
Claims15
An exhaust gas aftertreatment system for a diesel-engined vehicle, which system comprising a NOx Storage Catalyst (NSC) followed in a downstream direction by a Catalysed Soot Filter (CSF), wherein the CSF comprises an oxidative catalyst comprising a palladium-rich weight ratio of platinum and palladium.
A method of aftertreating the exhaust gases from a vehicular diesel engine comprising an exhaust gas aftertreatment system comprising a NOx Storage Catalyst (NSC) followed in a downstream direction by a CSF during a NSC regeneration event, which method comprising passing the exhaust gases from the NSC during said regeneration event over an oxidative catalyst comprising a palladium-rich weight ratio of platinum and palladium.
Dependencies are inferred from the claim text.