Patent ID: 6521193
Filing Date: 2003-02-18
Classification: F01N

Abstract:
A ceramic honeycomb gas duct assembly, comprising:a metal case having an inner surface; a ceramic honeycomb structure in the metal case, the honeycomb structure comprising an outer surface having a length and a curved circumference, a plurality of planar partition walls extending lengthwise within the structure and forming tetragonal cells of the honeycomb structure with a first set of partition walls forming sides of the cells and a second set of partition walls forming a top and a bottom of the cells, all partition walls bound by the outer surface; and a holding member between the outer surface of the honeycomb structure and the inner surface of the metal case, the holding member comprising two mutually connectable ends, said holding member being wound around the outer surface of the ceramic honeycomb structure with the two mutually connectable ends engaging each other at a connection area, and said connection area being located to face substantially perpendicularly either the first set of partition walls or the second set of partition walls constituting the honeycomb structure, said wound holding member holding the honeycomb structure in a state that said wound holding member is stuffed into the metal case from one opening of the metal case so as to be accommodated therein, wherein the width of the connection area of the holding member comprises 5 to 15% of the length of the circumference of the holding member.