Exhaust gas control equipment

An internal combustion engine exhaust gas catalyst unit comprising an exhaust gas casing having an inlet means and an outlet means with a cylindrical catalyst assembly filling the space between said inlet means and said outlet means, said inlet means and said outlet means both disposed in a direction substantially parallel to the direction of exhaust gas flow through the inside space of said casing to define an exhaust gas flow path along the axial direction of said cylindrical catalyst assembly;

• and
• a cylindrical catalyst assembly comprising at least one roll of composite sheet which comprises at least one catalyst-coated sheet of heat resistant glass fiber cloth retained between a pair of heat resistant supporting metal nets, the side edges of both metal nets being secured together by a pair of metal retaining and reinforcing strips inserted therebetween and secured to the edges of the opposing faces of said metal nets, said strips and metal nets retaining and protecting the catalyst-coated sheet against mechanical shock, said catalyst assembly in the form of a roll defining a cylinder having a plurality of exhaust gas flow paths in the axial direction of said cylindrical catalyst assembly to provide exhaust gas flow in the direction and along the surface of said composite sheet.