Automotive aftertreatment system having a tubular injector
AssigneeFaurecia Emissions Control Technologies, USA, LLC
InventorJerome B. Hornback
Life of this patent
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Abstract
An exhaust aftertreatment system for use with an automotive diesel engine, the system includes a selective catalytic reduction unit a reagent storage tank, and a reagent distribution system. A reagent fluid is stored in the reagent storage tank. The reagent is delivered to exhaust gases produced by the engine using the reagent distributor. The selective catalytic reduction unit is positioned downstream of the reagent distributor and is configured to remove effluents from the exhaust gases.
Claims16
A reagent distribution assembly for use in injecting a reagent into an stream of exhaust gases to treat the exhaust gases, the reagent distribution assembly comprising
- a mixer duct that defines a passageway configured to receive the exhaust gases and the reagent therein, and
- a reagent distributor that extends into the passageway and is configured to discharge the reagent into the exhaust gases moving through the passageway,
- wherein the reagent distributor includes a first panel arranged in the passageway of the mixer duct and shaped to include channels and a second panel coupled to the first panel to close the channels in the first panel and define tubular passages arranged in the passageway of the mixer duct.
An exhaust aftertreatment system adapted for use in automotive applications, the system comprising
- a selective catalytic reduction unit including a catalyst mounted in a housing,
- a reagent storage tank configured to hold reagent comprising a water and urea solution, and
- a reagent distribution assembly, the reagent distribution assembly including a mixer duct that defines a passageway configured to carry exhaust gases from an automotive engine to the selective catalytic reduction unit and a reagent distributor fluidly coupled to the reagent storage tank and that extends into the passageway and is configured to discharge reagent into the exhaust gases moving through the passageway before it interacts with the selective catalytic reduction unit,
- wherein the reagent distributor includes a first panel arranged in the passageway of the mixer duct and shaped to include channels and a second panel coupled to the first panel to close the channels in the first panel and define tubular passages arranged in the passageway of the mixer duct.
A vehicle, comprising
- a combustion engine, and
- an exhaust aftertreatment system adapted for use in automotive applications, the system including
- a selective catalytic reduction unit including a catalyst mounted in a housing,
- a reagent storage tank configured to hold reagent comprising a water and urea solution, and
- a reagent distribution assembly, the reagent distribution assembly including a mixer duct that defines a passageway configured to carry exhaust gases from an automotive engine to the selective catalytic reduction unit and a reagent distributor fluidly coupled to the reagent storage tank and that extends into the passageway and is configured to discharge reagent into the exhaust gases moving through the passageway before it interacts with the selective catalytic reduction unit,
- wherein the reagent distributor includes a first panel arranged in the passageway of the mixer duct and shaped to include channels and a second panel coupled to the first panel to close the channels in the first panel and define tubular passages arranged in the passageway of the mixer duct.
Dependencies are inferred from the claim text.