Catalyzed particulate filter and method for producing the same
AssigneeMazda Motor Corporation
InventorsTomoya TAKIZAWA, Hiroyuki KURITA, Kento UMEZAWA
Life of this patent
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Abstract
A catalyzed particulate filter is a filter that is arranged in an exhaust passage of an engine and captures particulate matter in exhaust gas, and includes a support that is porous, and a catalytic layer provided on a wall surface of the support, and the catalytic layer has a density of 2.0 g/cm3 or higher.
Claims17
A catalyzed particulate filter that is arranged in an exhaust passage of an engine and captures particulate matter in exhaust gas, the catalyzed particulate filter comprising:
- a support that is porous;
- and
- a catalytic layer provided on an exhaust gas passage wall of the support, the catalytic layer having a density of 2.0 g/cm3 or higher.
A method for producing a catalyzed particulate filter that is arranged in an exhaust passage of an engine and captures particulate matter in exhaust gas, the catalyzed particulate filter including a support that is porous and a catalytic layer provided on an exhaust gas passage wall of the support, the catalytic layer having a density of 2.0 g/cm3 or higher, the method comprising:
- mixing a raw material of the catalytic layer and a solvent to form a slurry;
- milling the slurry to make a mean particle diameter D50 of the slurry a predetermined value;
- and
- coating the exhaust gas passage wall of the support with the slurry, in this order.
Dependencies are inferred from the claim text.