Catalytically active particulate filter
AssigneeUmicore AG & Co. KG
InventorsJan SCHOENHABER, Naina DEIBEL, Martin ROESCH, Stephanie SPIESS, Joerg-Michael RICHTER, Susanne KUNERT
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AssigneeUmicore AG & Co. KG
InventorsJan SCHOENHABER, Naina DEIBEL, Martin ROESCH, Stephanie SPIESS, Joerg-Michael RICHTER, Susanne KUNERT
Estimating the term…
The present invention relates to a particulate filter which comprises a wall-flow filter of length L and two different catalytically active coatings Y and Z, wherein the wall flow filter comprises channels E and A that extend in parallel between a first and a second end of the wall-flow filter and are separated by porous walls which form the surfaces OE and OA, respectively, and wherein the channels E are closed at the second end and the channels A are closed at the first end. The invention is characterized in that the coating Y is located in the channels E on the surfaces OE and the coating Z is located in the porous walls.
A particulate filter for removing particles, carbon monoxide, hydrocarbons and nitrogen oxides from the exhaust gas of combustion engines fueled by stoichiometric air-fuel mixtures, which filter comprises a wall-flow filter of length L and two different coatings Y and Z, wherein the wall-flow filter comprises channels E and A that extend in parallel between a first and a second end of the wall-flow filter and are separated by porous walls which form the surfaces OE and OA, respectively, and wherein the channels E are closed at the second end and the channels A are closed at the first end, characterized in that coating Y is located in the channels E on the surfaces OE and extends from the first end of the wall-flow filter over a length of 51 to 90% of the length L, and coating Z is located in the porous walls and extends from the second end of the wall-flow filter over a length of 60 to 100% of the length L.
Dependencies are inferred from the claim text.