Oliff & Berridge, PLC
Filter catalyst for purifying exhaust gases
A filter catalyst is for purifying exhaust gases emitted from internal combustion engines and including particulates, and includes a wall-flow honeycomb structure and an upstream-side straight honeycomb structure. The wall-flow honeycomb structure includes inlet cells clogged on the downstream side of the exhaust gases, outlet cells neighboring the inlet cells and clogged on the upstream side of the exhaust gases, filter cellular walls demarcating the inlet cells and the outlet cells and having pores, and a catalytic layer formed on the surface of the filter cellular walls and/or the surface of the pores of the filter cellular walls. The upstream-side straight honeycomb structure is disposed on the upstream side of the exhaust gases with respect to the wall-flow honeycomb structure, is provided integrally with the wall-flow honeycomb structure, and includes upstream-side straight cells in which the exhaust gases flow straight, and upstream-side cellular walls demarcating the upstream-side straight cells.
Toyota Jidosha Kabushiki Kaisha Denso Corporation
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Mamoru Mikio Seiji
Nishimura Ishihara Okawara