Invention Grant
US08668891B2 Exhaust system for a lean-burn IC engine comprising a PGM component and a SCR catalyst
有权
用于含有PGM组分和SCR催化剂的稀燃IC发动机的排气系统
- Patent Title: Exhaust system for a lean-burn IC engine comprising a PGM component and a SCR catalyst
- Patent Title (中): 用于含有PGM组分和SCR催化剂的稀燃IC发动机的排气系统
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Application No.: US13711128Application Date: 2012-12-11
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Publication No.: US08668891B2Publication Date: 2014-03-11
- Inventor: Philip Gerald Blakeman , Sougato Chatterjee , Andrew Francis Chiffey , Jane Gast , Paul Richard Phillips , Raj Rao Rajaram , Andrew Peter Walker
- Applicant: Johnson Matthey Public Limited Company
- Applicant Address: GB London
- Assignee: Johnson Matthey Public Limited Company
- Current Assignee: Johnson Matthey Public Limited Company
- Current Assignee Address: GB London
- Agent Kevin M. Carroll
- Priority: GB1200781.1 20120118
- Main IPC: F01N3/10
- IPC: F01N3/10 ; F01N3/24 ; F01N3/28 ; B01D53/94 ; B01J23/40
Abstract:
An exhaust system 10 for a vehicular lean-burn internal combustion engine comprises: (a) a first substrate monolith 6 comprising a SCR catalyst; (b) at least one second substrate monolith 4 comprising a catalytic washcoat coating comprising at least one platinum group metal (PGM) disposed upstream of the first substrate monolith; and (c) a third substrate monolith 2 disposed between the first substrate monolith and the or each second substrate monolith, wherein at least one PGM on the or each second substrate monolith 4 is liable to volatilise when the or each second substrate monolith 4 is exposed to relatively extreme conditions including relatively high temperatures, and wherein the third substrate monolith 2 comprises a washcoat coating comprising at least one metal oxide for trapping volatilised PGM.
Public/Granted literature
- US20130149222A1 EXHAUST SYSTEM FOR A LEAN-BURN IC ENGINE COMPRISING A PGM COMPONENT AND A SCR CATALYST Public/Granted day:2013-06-13
Information query
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