Inlet metallic foam support coupled to precious metal catalyst for application on 4 stroke platforms
AssigneeBASF Catalysts LLC
InventorMichael Patrick Galligan
Life of this patent
Estimating the term…
Abstract
The present invention is directed to an improved dual phase muffler for the abatement of reduction of sound and emission pollutants such as hydrocarbons, carbon monoxide, and nitrogen oxides. More specifically, the muffler comprises a muffler casing, an inner chamber formed in the muffler, and a catalytically coated supported material contained within the inner chamber. The present invention is also directed to a catalytically coated metallic foam catalyst support, which optionally can be pre-coat with a metallic thermal arc sprayed layer.
Claims19
An apparatus for the reduction of utility engine sound and emissions comprising, a muffler casing, juxtaposed baffle plates disposed within the muffler casing forming an inner chamber, a reticulated metallic foam matrix contained in said inner chamber, and one or more precious metal catalysts coupled to said reticulated metallic foam matrix.
An apparatus for the reduction of utility engine sound and emissions comprising, a muffler casing, juxtaposed baffle plates contained within the muffler and forming an inner chamber within said muffler, a reticulated FeCrAlloy foam matrix contained in said inner chamber, and one or more precious metal catalysts coupled to said reticulated metallic foam matrix.
A method for reducing noise levels and for the abatement of utility engine emissions, said method comprising:
- (a) directing an engine exhaust gas stream through a muffler, said muffler comprising:
- (i) at least two baffle plates;
- (ii) a reticulated metallic foam matrix coated with one or more precious metal catalysts for the abatement of utility engine emissions, wherein said metallic foam is contained within said baffle plates;
- and
- (iii) one or more chambers located adjacent to said baffle plates;
- (b) directing said engine exhaust gas stream through said foam matrix and subsequently through said one or more chambers thereby reducing engine emissions and reducing noise;
- and
- (c) directing said engine exhaust gas stream from said one or more chambers out of said muffler.
Dependencies are inferred from the claim text.