Flow reversal chambers for increased residence time

Details Flow reversal chambers for increased residence time Flow reversal chambers for increased residence time

2008-03-17

2010-12-28

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S274000, C060S296000, C060S303000

Reexamination Certificate

active

07856807

ABSTRACT:
An apparatus is disclosed for increasing the residency time of a reducing agent in an exhaust gas cleaning system. The apparatus includes a first double-walled element in communication with a flow of exhaust having a first inner wall and a first outer wall. A second double-walled element is included having a second inner wall and a second outer wall. The second double-walled element is arranged in relation to the first double-walled element such that the second inner wall is positioned between the first inner wall and the first outer wall and the first outer wall is positioned between the second inner wall and the second outer wall. This arrangement defines a plurality of flow paths that reverses the flow of exhaust back on itself and then reverses the flow of exhaust once again.

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ISA/US Commissioner for Patents, PCT International Search Report and Written Opinion of the ISA, PCT Patent Application No. PCT/US2009/001687, May 11, 2009.

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