Patent ID: 6491878
Filing Date: 2002-12-10
Classification: F01N

Abstract:
A catalytic converter for purifying exhaust gases from an internal combustion engine, comprising:a monolithic ceramic substrate having a peripheral surface; a non-intumescent supporting mat encircling the peripheral surface; a metal shell enclosing and exerting a compressive force on the ceramic substrate and supporting mat, the metal shell having a narrower extending attachment portion and a wider enclosing portion, the narrower extending portion overlapping and being attached to the outer surface of the wider enclosing portion and the wider enclosing portion having metal shell end portions extending beyond the ends of the supporting mat; and resizing insert rings disposed within each of the metal shell end portions; the metal shell end portions being resized such that they are compressed into contact with the resizing insert rings, and the resized metal shell end portions being smaller in outer diameter than the outer diameter of the metal shell portions enclosing and exerting a compressive force on the ceramic substrate and supporting mat.