| 摘要 |
<p>The head has a cylinder head base (7) perforated with an intake duct (1) whose cylindrical wall includes a rectilinear axle part (53) located upstream of a curved axle part i.e. elbow (50), which includes an interior side (51) having a small curvature radius. The elbow opens on a housing (26) for a valve seat (25) that opens on a combustion chamber (3). The rectilinear axle part includes a ramp (41) inclined towards center of the intake duct and located near the interior side of the elbow, where the ramp is formed by molding.</p> |
