Catalyst and filter combination

An exhaust aftertreatment combined filter and catalytic converter comprising first, second and third sheets, said first and second sheets defining a plurality of flow-through channels passing said exhaust therethrough and catalytically reacting therewith, said third sheet defining with at least one of said first and second sheets a plurality of wall-flow channels trapping particulate.

An exhaust aftertreatment combined filter and catalytic converter for treating exhaust flowing axially along an axial flow direction along an axis, comprising first, second and third sheets, said second sheet being pleated and forming with said first sheet a plurality of axially extending flow channels, said second sheet having a plurality of pleats defined by wall segments extending in alternating manner between pleat tips at axially extending bend lines, the pleat tips on one side of said second sheet being in contiguous relation with said first sheet, said third sheet having a plurality of pleats defined by wall segments extending in zig-zag manner between pleat tips at transversely extending bend lines which extend transversely to said axis and transversely to said first sheet, said first sheet extending axially and extending laterally relative to said transversely extending bend lines of said pleat tips of said third sheet.

A filter for filtering fluid flowing axially along an axial flow direction along an axis, comprising first, second and third sheets, said second sheet being pleated and forming with said first sheet a plurality of axially extending flow channels, said second sheet having a plurality of pleats defined by wall segments extending in alternating manner between pleat tips at axially extending bend lines, the pleat tips on one side of said second sheet being in contiguous relation with said first sheet, said third sheet having a plurality of pleats defined by wall segments extending in zig-zag manner between pleat tips at transversely extending bend lines which extend transversely to said axis and transversely to said first sheet, said first sheet extending axially and laterally relative to said transversely extending bend lines of said pleat tips of said third sheet.