| 摘要 |
A return pressure variable jet valve is provided that the excessive rising of return pressure is prevented although the fuel amount filled in the fuel tank is much. A return pressure variable jet valve(100) comprises as follows. The returned fuel is inflowed from the engine to the reservoir cup. The negative pressure is generated and the fuel within the fuel tank(200) is sucked in into the reservoir cup. One or more penetration holes(120) communicating the flow channel in which the fuel passes to outside is formed. A float(130) which generates the buoyancy when being enhanced than the water level in which the fuel water level of the fuel tank is set up in advance. The penetration hole is closed if the buoyancy is not generated in the float. The variable valve(140) which opens the penetration hole if the buoyancy is generated in the float is included. |
