| 摘要 |
An air swirling device (10) for an internal combustion engine which is disposed in an air cleaner (3) has a plurality of vanes (13) for causing the air to swirl thereby improving the properties of the air fuel mixture and improving the performance of the engine. Each of the vanes (13) has at least one nose angle theta at the leading edge (13a) thereof for reducing resistance of air flow due to shockwave caused by high speed airflow towards the vanes. |
