Patent ID: 8394333
Filing Date: 2013-03-12
Classification: F01N

Abstract:
1. A holding material for a catalytic converter comprising a catalyst carrier having an elliptical cross section, a metal casing for receiving the catalyst carrier, and the holding material mounted on the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, wherein the holding material has a first portion and a second portion, and the first portion in contact with a region of the catalyst carrier, corresponding to 40 to 95% of a major axis centering on an intersection of an ellipse and a minor axis in the elliptical cross section of the catalyst carrier, is larger than the second portion in contact with any other region of the catalyst carrier in basis weight, wherein the holding material has a constant thickness and the fluctuation in thickness is ±10% or less, and the basis weight ratio of the first portion is from 1.05 to 2.0 times the basis weight of the second portion.