| 摘要 |
PURPOSE:To prevent the crosscurrent of high-pressure gas fuel to a suction path, and to suck the gas fuel of large volume into a combustion chamber in a short time by each mounting an air suction valve supplying air and a fuel suction valve supplying high-pressure gas fuel independently to the combustion chamber. CONSTITUTION:In a suction process, the air suction valves 20, 22 are opened at a predetermined crank angle before the top dead center of a piston 14, and air is flowed into the combustion chamber 50. The fuel suction valve 24 is opened near the bottom dead center of the piston, and high-pressure gas fuel, such as hydrogen, methane, ethane, etc. is flowed into the combustion chamber 50. The gas fuel of large volume is sucked into the combustion chamber 50 because the fuel suction valve 24 is formed in a large bore of which the ratio of a valve diameter to a lift is 8:1-40:1 and the small lift. |
