TECHNICAL FIELD

The present application relates generally to the field of aftertreatment systems for internal combustion engines.

BACKGROUND

For internal combustion engines, such as diesel engines, nitrogen oxide (“NOx”) compounds may be emitted in the exhaust. To reduce NOxemissions, a selective catalytic reduction (“SCR”) process may be implemented to convert the NOxcompounds into more neutral compounds, such as diatomic nitrogen, water, or carbon dioxide, with the aid of a catalyst and a reductant. The catalyst may be included in a catalyst chamber of an exhaust system, such as that of a vehicle or power generation unit. A reductant, such as anhydrous ammonia, aqueous ammonia, or urea, is typically introduced into the exhaust gas flow prior to the catalyst chamber. One commonly used urea source is diesel exhaust fluid (“DEF”), which decomposes and hydrolyzes in a two-step reaction to form ammonia. To introduce the reductant into the exhaust gas flow for the SCR process, an SCR system may dose or otherwise introduce the reductant through a dosing module that vaporizes or sprays the reductant into an exhaust pipe of the exhaust system up-stream of the catalyst chamber. The SCR system may include one or more sensors to monitor conditions within the exhaust system.

SUMMARY

Implementations described herein relate to an aftertreatment component including an aftertreatment housing. The aftertreatment housing has a first surface positioned so as to be directly impinged by diesel exhaust fluid injected into the aftertreatment housing. The first surface is a polished surface.

Another implementation relates to a method for processing an aftertreatment component. A first surface of a splash plate is polished using an extrude honing process. The splash plate is positioned in the housing such that the first surface of the splash plate is to be directly impinged by diesel exhaust fluid injected into the housing.

