Mixing apparatus for an exhaust after-treatment system

Details Mixing apparatus for an exhaust after-treatment system Mixing apparatus for an exhaust after-treatment system

2011-03-22

2011-03-22

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S272000, C060S274000, C060S295000, C060S299000, C060S303000, C060S324000

Reexamination Certificate

active

07908845

ABSTRACT:
A mixing apparatus mountable within a generally cylindrical passage defined by an exhaust gas conduit of an exhaust gas after-treatment system is provided. The passage includes an outer region and an inner region operable to convey an exhaust stream and a liquid stream, such as a urea stream. The mixing apparatus includes a retainer ring operable to retain the mixing apparatus within the passage. A first plurality of fins extends from the retainer ring and is operable to impart a rotational velocity component in a first direction to the exhaust stream and urea stream in the outer region of the passage. A second plurality of fins extends from the retainer ring and is operable to impart a rotational velocity component in a second direction, opposite the first direction, to the exhaust stream and urea stream in the inner region of the passage.

REFERENCES:
patent: 6449947 (2002-09-01), Liu et al.
patent: 7328572 (2008-02-01), McKinley et al.
patent: 7533520 (2009-05-01), Cheng et al.
patent: 7581387 (2009-09-01), Bui et al.
patent: 102007012790 (2008-09-01), None
patent: 1712751 (2006-10-01), None

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