| 摘要 |
<p>The present invention provides an intake port for an ideal tumble flow, capable of evenly mixing air and fuel by changing the shape of the intake port having an installation angle into a combustion chamber and a curvature so as to generate an ideal tumble flow inside the combustion chamber. The present invention endures a load applied to a cutting groove unit of a coupling bolt in a perpendicular direction to the cutting groove unit by vibration generated in a railroad vehicle to prevent the coupling bolt from being broken down under the load not more than the allowing load.</p> |
