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US09528413B2 Synergistic SCR/DOC configurations for lowering diesel emissions 有权
减少柴油排放的协同SCR / DOC配置

Synergistic SCR/DOC configurations for lowering diesel emissions
Abstract:
A motor-vehicle engine system comprises a first DOC configured to receive exhaust from an engine and an SCR device coupled downstream of the first DOC in a flow direction of the exhaust. The system further comprises a second DOC coupled downstream of the SCR device. The system takes advantage of hydrocarbon sorption in the SCR catalyst that is a function of temperature to enable reduced hydrocarbon emissions via oxidation at the second DOC.
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