| 摘要 |
It is an object to reduce the pumping work, and to improve the fuel consumption rate by preventing the injection path part of a fuel gas supply device from protruding from the wall surface of the inlet path, and reducing the circulation resistance against the sucked air. There is provided a gas engine fuel gas supply device in which a fuel gas flows along the axial direction on the outer circumferential side of an inlet valve rod 4, and is supplied into the inlet path in a cylinder head. In the device, in the inner circumferential surface of a sleeve 6 slidably fitted with a projection 5, the project 5 being a portion of the inlet valve rod 4, having an outer diameter larger than the inlet valve rod 4, and being concentric with and in parallel with the inlet valve rod, there is provided a suction hole 6b situated within the region of movement of the projection 5, and to be opened and closed in response to the movement of the inlet valve rod 4, and a fuel gas injection hole 6a is formed in the bottom end face of the sleeve 6 communicating with the suction hole 6b. The device is characterized in that the sleeve is disposed so as not to protrude into the inlet path. |
