Patent ID: 7713492
Filing Date: 2010-05-11
Classification: F01N,Y02A

Abstract:
1. An apparatus for treating exhaust gases from a mobile internal combustion engine, the apparatus comprising: an exhaust pipe with a direction of extent; a honeycomb body including at least ceramic or extruded material; said exhaust pipe and said honeycomb body defining a gap therebetween; at least first and second metallic fiber mats at least partially disposed between said exhaust pipe and said honeycomb body and mutually spaced apart in said direction of extent, said at least first and second fiber mats forming at least three zones with different functions in said direction of extent; said at least three zones including at least one first zone having a function of mounting said honeycomb body, at least one third zone having a function of thermal insulation and at least one second zone having a function of sealing against a gas; said at least one first zone including only metallic fibers connected to one another; and said at least one second zone and said at least one third zone being at least partially formed of a foil-like layer, said foil-like layer being partially disposed between said first fiber mat and said honeycomb body, said foil-like layer being partially disposed between said second fiber mat and said exhaust pipe and said foil-like layer thereby forming a seal with respect to a gas by bridging said gap.