Apparatus and method for filtering particulate and reducing...

Details Apparatus and method for filtering particulate and reducing... Apparatus and method for filtering particulate and reducing...

2006-01-24

2006-01-24

Smith, Duane (Department: 1724)

Gas separation: processes

Solid sorption

Inorganic gas or liquid particle sorbed

C095S008000, C095S148000, C095S273000, C095S278000, C095S285000, C055S282300, C055S284000, C055S302000, C055S303000, C055S385300, C055S394000, C055S428100, C055S429000, C055S433000, C055S523000, C055S524000, C055SDIG010, C055SDIG030, C060S274000, C060S295000, C060S296000, C060S297000, C060S299000, C060S301000, C060S303000, C060S311000, C422S168000, C422S180000, C422S183000

Reexamination Certificate

active

06989045

ABSTRACT:
An apparatus and method for filtering particulate from an internal combustion engine by use of monolithic particulate trap systems having porous walls (2c,24c). The porous walls (2c,24c) filter the particulate. The filtered particulate on inner surfaces of the porous walls is periodically removed or regenerated via back flow of previously filtered exhaust gas. The back flow is caused by creating a pressure difference across the porous walls. The back flow of the previously filtered exhaust gas is simultaneously or sequentially coupled with high velocity through flow of exhaust gas in the channels. In addition, the particulate trap system can be an adsorber-catalyst particulate trap system for filtering particulate and reducing NOx via an adsorber-catalyst trap systems to achieve the EPA 2007 standards.

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