Abstract: An integrated air filter and hydrocarbon adsorbing apparatus includes an air filter comprising a filter media disposed on a screen support and an air permeable hydrocarbon adsorbing material disposed between the filter media and the screen support at the air stream outlet end of the apparatus. The hydrocarbon adsorbing material is situated to adsorb hydrocarbon emissions at the clean air side of an air stream flowing through the apparatus. The treated air stream exits through the air stream outlet, typically to an inlet of an engine air induction system. In an alternate embodiment, the integrated air filter and hydrocarbon adsorbing apparatus comprises a hydrocarbon adsorbing coating directly disposed on a portion of the air filter adjacent the air stream outlet.

Abstract: A catalytic converter structure is provided for purifying exhaust gases from an internal combustion engine. The catalytic converter structure includes a cylindrical catalyst substrate; a first cylindrical tube covering a first end of the substrate; a second cylindrical tube covering a second end of the substrate; a support mat surrounding a central portion of the substrate and portions of the first and second cylindrical tubes; and a cylindrical housing within which the substrate, first and second cylindrical tubes and the support mat are located. The structure requires few components, is easy to tool and easy to adapt to different engine implementations.

Abstract: A catalytic converter structure comprising: cylindrical catalyst substrate; a first cylindrical tube covering a first end of the substrate; a second cylindrical tube covering a second end of the substrate; a support mat surrounding a central portion of the substrate and portions of the first and second cylindrical tubes; and a housing having a cylindrical shape, within which the substrate, first and second cylindrical tubes and the support mat are located, wherein the housing has a central body and first and second housing ends, wherein the housing ends each have a first diameter less than a second diameter of the central body, wherein the first and second housing ends engage the first and second cylindrical tubes, respectively. The structure requires few components, is easy to tool and easy to adapt to different engine implementations.