| 摘要 |
PURPOSE:To improve the filling efficiency of an engine through simple structure without mounting a supercharger. CONSTITUTION:A revolving tool 10 for guiding intake air having one of a spiral groove 7 and a spiral blade is arranged on the inner peripheral wall 6 of the intake passage 1 of an engine and the spiral revolving central axis A of the revolving tool 10 for guiding intake air is extended along the axial direction of an intake passage 1. Intake air has a flow regulated by the revolving tool 10 for guiding intake air and smoothly flows in a combustion chamber as it is revolved, whereby the filling efficiency of intake air is improved through simple structure. |
