US 5,314,665 A · Catalytic converter

Abstract

A catalytic converter for purifying exhaust gas from an internal combustion engine. The catalytic converter is comprised of a honeycomb monolithic catalytic element disposed in a casing. The catalytic element includes flat and corrugated metallic sheets which are formed into a cylinder by putting one upon another and spirally winding the metallic sheets. Catalyst is supported on the surface of the metallic sheets to define a plurality of axially extending gas passages through which exhaust gas flows to be purified. A metallic surface of the metallic honeycomb carrier is exposed at the outer peripheral surface of the catalytic element. The exposed metallic surface or outer peripheral surface of the catalytic element is in direct contact with the inner peripheral surface of the casing, thereby preventing the catalyst from peeling off even upon gliding contact of the catalytic element with the casing while promoting heat transmission from the catalytic element to the casing.

Claims8

Dependent claims

A catalytic converter for purifying exhaust gas from an internal combustion engine, comprising:

a casing;
a honeycomb monolithic catalytic element disposed in said casing and including a metallic honeycomb carrier including flat and corrugated metallic sheets which are put one upon another and spirally wound to form therebetween elongate openings, wherein the spirally wound carrier is formed such that said flat sheet forms an outer peripheral surface which contacts an inner peripheral surface of said casing, and catalyst supported on the surfaces of said flat and corrugated metallic sheets defining said elongate openings, said catalyst supported on the surfaces of said flat and corrugated metallic sheets defining gas passages through which exhaust gas from the engine passes, a gas passage being formed in each elongate opening;
wherein said outer peripheral surface which contacts said inner peripheral surface of said casing is an exposed metallic surface with no catalyst supported or disposed thereon such that said exposed metallic surface of said honeycomb monolithic catalytic element is in direct contact with said inner peripheral surface of said casing with no catalyst therebetween.

Dependencies are inferred from the claim text.

Catalytic converter

Life of this patent

Catalytic converter

Life of this patent

Abstract

Claims8