| 摘要 |
PURPOSE:To improve combustion through swirl effect under intermediate/low speed region thus to increase the output while to increase the output under high speed region. CONSTITUTION:One of intake valves 4 is positioned near the radial line (a) in back/fro direction of cylinder bore 1a while two other valves are positioned laterally while separated from said line (a). Under intermediate/low speed region, mixed gas will flow with high speed while swirling in circumferential direction through single intake valve 4 at one lateral side continuous with first intake path 9 into the cylinder bore 1a thus to improve combustion through swirl effect. While under high speed region, abundant amount of mixed gas will flow through three intake valves 4 to improve the intake efficiency resulting in increase of output. |
