EXHAUST AFTERTREATMENT SYSTEM WITH IN-ELBOW REDUCTANT INJECTION

摘要

An exhaust aftertreatment system, such as for a diesel engine, includes a reductant dosing system with an injector positioned in an elbow pipe of an exhaust conduit. A tubeless mixer is positioned in the exhaust conduit between the injector nozzle outlet and an SCR catalyst. The tubeless mixer includes a plurality of rings, all of which are distributed with increasing size as distance from the nozzle outlet increases. The tubeless mixer aides in more uniformly distributing reductant in the exhaust flow prior to arrival at the SCR catalyst.

主权项

1. An exhaust aftertreatment system comprising:
an exhaust conduit with an elbow pipe positioned between an engine end and a tailpipe end; an SCR catalyst positioned in the exhaust conduit between the elbow pipe and the tailpipe end; a reductant dosing system with a nozzle outlet of an injector positioned in the elbow pipe of the exhaust conduit; a tubeless mixer positioned in the exhaust conduit between the nozzle outlet and the SCR catalyst; and the tubeless mixer includes a plurality of rings, all of which are distributed with increasing size as distance from the nozzle outlet increases.