| 摘要 |
The invention refers to an air inlet manifold (101) for an internal combustion engine with a number of cylinders, a distribution chamber (106) for air restricted by at least a first internal wall (107). The inlet manifold also comprises a plurality of pipe channels (113) each restricted by at least a second internal wall (114), which pipe inlet (112) is described by a first surface (116) with a first area (117) restricted by a first line (118) in the boundary between the pipe inlet (112) and the first internal wall (107). The pipe channel (113) in a first cross-section (119) is described by a second surface (120) with a second area (121) restricted by a second line (122; 222; 322; 422; 522; 622; 722) along the perimeter of the pipe channel (113), which first cross-section (119) is generally perpendicular to the extension direction of the pipe channel (113). The invention is characterised in that for at least one of said pipes, a profile (123) between the first line (118) and the second line (122) located proximate to the air inlet (105) has a different curvature than a profile (124) between the first line (118) and the second line (122) located distant from the air inlet (105). <IMAGE> |
