Honeycomb structure

Details Honeycomb structure Honeycomb structure

2007-03-26

2009-08-11

Speer, Timothy M (Department: 1794)

Stock material or miscellaneous articles

Structurally defined web or sheet

Honeycomb-like

C428S117000, C428S119000, C055S483000, C055S523000

Reexamination Certificate

active

07572497

ABSTRACT:
There is disclosed a honeycomb structure which solves a problem of antinomy that it is difficult to satisfy both of a high temperature rise performance and a high thermal capacity at the same time and which is disposed at a previous stage of a filter for trapping particulate matters (PM) discharged from a diesel engine so that regeneration of the PM trapped by the filter can smoothly be completed and an exhaust gas can efficiently be purified. In a honeycomb structure in which a plurality of cells arranged in parallel with one another to communicate between two end surfaces of the honeycomb structure are formed by a plurality of partition walls, the plurality of partition walls are made of a ceramic, each cell is formed into a substantially square shape, an intersection between the partition walls is formed into an R-shape or a C-shape, a value (L/T) of a ratio of a diagonal distance L between the intersections to an average thickness T of the partition walls is set to 1.6 or more, and an open area ratio of the cells is set to 55% or more.

REFERENCES:
patent: 6159431 (2000-12-01), Inoue et al.
patent: 2004/0123573 (2004-07-01), Ichikawa et al.
patent: 2004/0137194 (2004-07-01), Fukao et al.
patent: 2005/0180898 (2005-08-01), Yamada
patent: 1 413 344 (2004-04-01), None
patent: A 10-264125 (1998-10-01), None

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