| 摘要 |
PURPOSE:To lower the fuel consumption and to stabilize combustion of a tow- cycle internal-combustion engine, by forming a recessed combustion chamber in the top surface of a piston, and enabling to feed fuel ejected from an injection nozzle into said combustion chamber. CONSTITUTION:A low-pressure injection nozzle 13 is disposed in a cylinder block 1, and a recessed combustion chamber 14 is formed in the top surface of a piston 5. Further, a fuel inlet passage 15 is formed in the manner of communicating the combustion chamber 14 with the outside of the piston 5, so that fuel ejected from the injection nozzle 13 can be introduced into the combustion chamber 14. By employing such an arrangement, it is enabled to prevent blow- bye of fuel through an exhaust port 8 in a more reliable manner and to thereby lower the fuel consumption. |
