Exhaust-gas aftertreatment system for an internal combustion engine, internal combustion engine having an exhaust-gas aftertreatment system, and use of an air flow nozzle
AssigneeMTU Friedrichshafen GmbH
InventorsMarc Hehle, Olaf Schäfer-Welsen, Claudia Riedel
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Abstract
An exhaust-gas aftertreatment system for an internal combustion engine, having a catalyst device, which is designed to catalytically react at least one exhaust-gas component with a reactant, and a reactant-metering device, which is arranged upstream of the catalyst device along a flow path of the exhaust gas through the exhaust-gas aftertreatment system. The reactant-metering device has at least one exhaust-gas flow nozzle.
Claims18
An exhaust-gas aftertreatment system for an internal combustion engine, comprising
- a catalytic converter device configured for catalytic conversion of at least one exhaust-gas component with a reactant;
- and
- a reactant-metering device arranged upstream of the catalytic converter device, as seen along a flow path of exhaust gas through the exhaust-gas aftertreatment system, wherein the reactant-metering device includes at least one exhaust-gas flow nozzle wherein the exhaust-gas flow nozzle is an air flow nozzle driven by exhaust gas and has at least one film applicator with a shearing edge, wherein the at least one film applicator is configured so that a liquid film is applicable to the film applicator and is drivable by a shearing stress to the shearing edge of the film applicator, wherein the shearing edge is configured so that the liquid film is sheared off by aerodynamic gas forces and the liquid film is atomized.
A method for operating an exhaust-gas aftertreatment system for an internal combustion engine, comprising the steps of:
- catalytically converting an exhaust gas component with a reactant in a catalytic converter;
- and
- using an exhaust gas driven air flow nozzle having at least one film applicator with a shearing edge in a reactant-metering device or as a reactant-metering device upstream of the catalytic converter, wherein a liquid film is applicable to the film applicator and is drivable by a shearing stress to the shearing edge of the film applicator, wherein the shearing edge is configured so that the liquid film is sheared off by aerodynamic gas forces and the liquid film is atomized.
Dependencies are inferred from the claim text.