Honeycomb body with a cross-sectional region which is bordered in the interior, in particular for small engines

A catalytic converter assembly for an exhaust gas system of an internal combustion engine, the catalytic converter assembly comprising:

• a housing having a cross-section with a cross-sectional area;
• and
• a catalytic converter formed of at most two layers with sheets and disposed in said housing, said catalytic converter including:
• a sheet having a thickness;
• at least one sheet of said sheets being a structured sheet having a structuring, a catalytically active material and a given thickness, said at least one structured sheet and said sheet forming a layer of said at most two layers, said layer being wound and said at least one structured sheet at least partially bears against said housing, said structuring of said at least one structured sheet in addition with one of said housing and said sheet of said layer of said at most two layers define closed passages there-between through which exhaust gases can flow and such that, as considered over said cross-section of said housing, a cross-sectional area which is bordered in by said closed passages constitutes at least half of a total of said cross-sectional area of said housing and defines a bordered-in cross-sectional area;
• and
• said thickness of said sheet being thicker than said given thickness of said at least one structured sheet by a factor of between 1.5 and 5.