Aftertreatment system
AssigneeCummins Inc.
InventorsDylan Scott Trandal, Krishna Kamasamudram, Rayomand Dabhoiwala, Shirish S. Punde
Life of this patent
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Abstract
An aftertreatment system includes a dosing module. The aftertreatment system includes a selective catalytic reduction unit disposed fluidly downstream of the dosing module. The aftertreatment system includes a conduit fluidly connecting the dosing module to the selective catalytic reduction unit. The conduit has a coating disposed on a surface thereof. The coating is exposed to exhaust passing through the conduit and to the selective catalytic reduction unit. The coating is configured to capture and deactivate platinum passing through the conduit.
Claims18
An aftertreatment system comprising:
- a dosing module;
- a selective catalytic reduction (SCR) unit disposed fluidly downstream of the dosing module;
- and
- a conduit disposed fluidly upstream of the SCR unit and fluidly connecting the dosing module to the SCR unit, the conduit having a coating disposed on a surface thereof, the coating:
- exposed to exhaust passing through the conduit and to the SCR unit;
- and
- configured to capture and deactivate platinum passing through the conduit;
- and
- a mixer disposed fluidly upstream of the SCR unit and fluidly downstream of the dosing module, at least a portion of the mixer having the coating disposed thereon.
An aftertreatment system comprising:
- a diesel oxidation catalyst (DOC) containing platinum;
- a conduit disposed downstream of the DOC and fluidly coupled to the DOC, the conduit having a coating disposed on a surface thereof, the coating:
- exposed to exhaust passing through the conduit and from the DOC;
- and
- configured to capture and deactivate platinum passing through the conduit;
- and
- a dosing module mounted to the conduit, wherein the coating is disposed downstream of the dosing module;
- and
- a mixer fluidly coupled to the conduit, at least a portion of the mixer having the coating disposed thereon.
A system comprising:
- an engine;
- and
- an aftertreatment system in exhaust receiving communication with the engine, the aftertreatment system comprising:
- a dosing module;
- a selective catalytic reduction (SCR) unit disposed fluidly downstream of the dosing module;
- and
- a conduit fluidly connecting the dosing module to the SCR unit, the conduit having a coating disposed on a surface thereof, the coating:
- exposed to the exhaust passing through the conduit and to the SCR unit;
- and
- configured to capture and deactivate platinum passing through the conduit;
- wherein an inlet of the SCR unit has the coating disposed thereon.
Dependencies are inferred from the claim text.