| abstract |
A system for increasing the temperature in an exhaust aftertreatment system upstream of an exhaust aftertreatment device, such as a selective catalyst reduction (SCR) device, is provided. In one form, the system includes a component within an exhaust stream that is exposed to the exhaust stream and temperatures of at least 200 ° C. At least one surface of the component includes an adhesive ceramic coating that acts as a catalyst to accelerate the heating of the exhaust stream. In another form, a secondary catalyst adheres to the ceramic coating. The component may be one or more parts of the turbocharger, such as nozzles, vanes, header pipes and impellers. |