초록 ▼

A device for catalytically converting automotive exhaust gas pollutants to harmless substances comprises a plurality of catalyst units or sections of selected limited length which are disposed in alternate sequence with heat-dissipating means within a container so that the automotive exhaust gasses

A device for catalytically converting automotive exhaust gas pollutants to harmless substances comprises a plurality of catalyst units or sections of selected limited length which are disposed in alternate sequence with heat-dissipating means within a container so that the automotive exhaust gasses can be passed through the catalyst sections and heat-dissipating means in sequence. Each catalyst section is formed from a pair of corrugated strips of catalyst material which are wrapped together in a jelly-roll configuration. The paired catalyst strips have corrugations which are disposed obliquely relative to each other so that obliquely intersecting passage portions provided by the corrugations cooperate in forming passages of continuously varying cross-sectional area extending through each catalyst section.

대표청구항 ▼

A device for catalytically converting automotive exhaust gas pollutants to harmless substances comprising a container having an inlet and an outlet at opposite ends of said container, a plurality of pairs of strips of metal catalyst material, each strip having a plurality of corrugations therein ext

A device for catalytically converting automotive exhaust gas pollutants to harmless substances comprising a container having an inlet and an outlet at opposite ends of said container, a plurality of pairs of strips of metal catalyst material, each strip having a plurality of corrugations therein extending obliquely across the longitudinal axes of said strips, each pair of said corrugated strip materials being wrapped together in a jelly roll configuration to form a generally cylindrical catalyst unit, whereby said plurality of pairs of said strips form a plurality of said cylindrical catalyst units, said paired strip materials having the corrugations thereof obliquely disposed relative to each other so that said corrugations define obliquely intersecting passage portions which cooperate to define a multiplicity of passages of continuously varying cross-sectional area extending from end to end through each of said cylindrical catalyst units, said plurality of catalyst units being disposed in spaced sequential relation to each other within said container with the cylindrical axes of the cylindrical catalyst units extending in the direction between the inlet and outlet of said container for permitting automotive exhaust gasses to pass through said catalyst units in sequence to catalytically convert pollutants in the gasses to harmless substances, said catalyst units each having a selected cylinder length for limiting heat buildup in said gasses passing through said catalyst unit as a result of exothermic catalytic reactions in said gasses, and heat dissipating means disposed within said container between said catalyst units for reducing the temperature of said gasses passing between said catalyst units.