| 摘要 |
PURPOSE:To prevent extinguishing of the flame jet and reduce the fuel consumption rate by communicating the escape portions on the upper surface of a piston provided in correspondence to a suction valve and an exhaust valve to an injection hole of a turbulence chamber by means of an guiding groove provided on the upper surface of the piston. CONSTITUTION:A pair of suction valves 7 and 7 and an exhaust valve 8 are provided in a cylinder head 3. Escape portions 9, 9 and 10 are provided in correspondence to respective valves 7, 7 and 8. The flame jet through the injection hole 6 of the turbulence chamber 5 is forced in the excape portions 9, 9 and 10 to form a turbulence flow, and combustion cavities operate. In this manner, the fuel consumption rate is reduced without substantially lowering the compression ratio. |
