| 摘要 |
<p>The exhaust member of an internal combustion engine according to the invention comprises an exhaust manifold (2) with an inner sheet (20) and an outer sheet (21) welded to a turbocharger (3) via an inlet duct with an inner sheet (30) and an outer sheet (31) characterised in that the inlet duct is welded to the outer sheet (21) of the exhaust manifold and in that the inner sheet (20) of the manifold (2) is connected by a sliding link. The welding (4) between the exhaust manifold (2) and the inlet duct must make it possible to limit thermally induced mechanical stresses likely to result in cracks in the welding (4) that could destroy it; for this reason, the inlet duct, which has a proportionally lower temperature, is connected to the outer sheet (21) of the exhaust manifold (2) which also has a lower temperature than the inner sheet (20) of the manifold (2). Since the temperature difference is less between the various sheets welded together, the thermally induced mechanical stresses are correspondingly reduced. The sliding link of the inner sheet (20) of the manifold (2) with the inlet duct of the turbine housing gives it the possibility of expanding freely under the effect of heat.</p> |
