EXHAUST AFTERTREATMENT SYSTEM WITH IN-ELBOW REDUCTANT INJECTION

摘要

An exhaust aftertreatment system (11), such as for a diesel engine (10), includes a reductant dosing system (40) with an injector (41) positioned in an elbow pipe (21) of an exhaust conduit (20). A tubeless mixer (50) is positioned in the exhaust conduit (20) between the injector (41) nozzle outlet (44) and an SCR catalyst (30). The tubeless mixer (50) includes a plurality of rings (51), all of which are distributed with increasing size as distance from the nozzle outlet (44) increases. The tubeless mixer (50) aides in more uniformly distributing reductant in the exhaust flow prior to arrival at the SCR catalyst (30).