초록 ▼

In a metal catalyst converter configured of the metal catalyst carrier that holds the catalyst into the honeycomb body created by alternately winding flat sheet and corrugated sheet, a plurality of slit matrix that extend in the direction perpendicular to the exhaust gas direction were arranged on a

In a metal catalyst converter configured of the metal catalyst carrier that holds the catalyst into the honeycomb body created by alternately winding flat sheet and corrugated sheet, a plurality of slit matrix that extend in the direction perpendicular to the exhaust gas direction were arranged on at least one part of the upstream side of the exhaust gas passage. By that a low heat capacity and high heat transfer area in regard to the downstream side of the exhaust gas passage was formed. The upstream portion of the metal catalyst converter on which slit matrix was formed was configured to be covered by outer casing having an air insulation layer. The upstream side of this outer casing was held and fixed to the exhaust gas passage.

대표청구항 ▼

A honeycomb body arranged in the exhaust gas passage of an engine, comprising; at least one flat metal sheet; at least one corrugated metal sheet superimposed with said flat metal sheet one over the other and defining a metal catalyst carrier having a plurality of axial gas passages to allow exhaust

A honeycomb body arranged in the exhaust gas passage of an engine, comprising; at least one flat metal sheet; at least one corrugated metal sheet superimposed with said flat metal sheet one over the other and defining a metal catalyst carrier having a plurality of axial gas passages to allow exhaust gas to flow axially from an upstream side to a downstream side of said gas passages, said flat metal sheet and said corrugated metal sheet each having an upstream portion and a downstream portion; wherein said upstream portion is a low heat capacity area which is smaller in heat capacity than said downstream portion; wherein said carrier is configured by alternately winding or laminating said at least one flat metal sheet and said at least one corrugated metal sheet, said low heat capacity area is configured of a slit matrix created by a plurality of rows of slits which are through-holes, and said rows of slits extend in a direction generally perpendicular to said gas passages.