Patent ID: 6254142
Filing Date: 2001-07-03
Classification: F01N,Y10T

Abstract:
An exhaust manifold for use with an internal combustion engine comprising:at least one stub pipe (5); andan exhaust manifold flange to provide a gas tight connection between a cylinder head of the internal combustion engine and the exhaust manifold, the exhaust manifold flange having a basic part (2) made of sheet steel including a first bead (3) which extends substantially around an entire outer circumference of the basic part (2);the basic part (2) defining at least one receiving hole (4) sealably receiving and fast with the at least one stub pipe (5), said receiving hole (4) being provided with a second bead (6) extending substantially around an entire circumference of the receiving hole; andattachment holes (7) formed in the basic part (2) to facilitate attachment of the exhaust flange to a wall of the internal combustion engine, whereina diametrical cross-section of the second bead (6) around the receiving hole (4) defines a portion of greater width in the direction of the basic part (2), and an outer circumferential wall of the second bead (6) facing away from the receiving hole (4) has the form of a tractrix curve.