Perforated mixing pipe with swirler

摘要

An aftertreatment system may include an exhaust pipe and a mixing pipe. The exhaust pipe may receive exhaust gas from an engine and may include a first portion defining a first longitudinal axis and a second portion defining a second longitudinal axis that is angled relative to the first axis. The mixing pipe may be disposed in the exhaust pipe and may include a tubular portion and a collar extending radially outward from the tubular portion. The tubular portion may include a plurality of openings and a plurality of deflectors. The plurality of openings may extend through inner and outer diametrical surfaces of the tubular portion. Each of the plurality of deflectors may be disposed adjacent a corresponding one of the plurality of openings.

主权项

1. An aftertreatment system comprising:
an exhaust pipe receiving exhaust gas from an engine and including a first portion defining a first longitudinal axis and a second portion defining a second longitudinal axis that is angled relative to the first axis; and a mixing pipe disposed in the exhaust pipe and including a tubular portion and a collar extending radially outward from the tubular portion, the collar comprising a swirler having a plurality of blades extending radially outward from the tubular portion, the tubular portion including a plurality of openings and a plurality of deflectors, the plurality of openings extending through inner and outer diametrical surfaces of the tubular portion, each of the plurality of deflectors disposed adjacent a corresponding one of the plurality of openings, wherein each of the blades includes a radially inner end and a radially outer end, the radially outer ends being spaced apart from each other.