| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a chamber structure by which a desired flow amount of fuel can be smoothly led to flow down. SOLUTION: A communicating hole 11 by which fuel is fed to the inside of a chamber main body 10a is arranged in the circumferential wall part 10c of the chamber main body 10a which is fixed on the fuel tank bottom surface part 1a of a vehicle and on which a fuel pump suction port 3a is faced, and also a negative pressure chamber 13 in which a fuel tank side communicating hole 12 communicated with the inside of a fuel tank 1 is formed in the inside of the communicating hole 11. An introducing opening part 7a for introducing return fuel flowed back the inside of the fuel tank 1 is faced in the inside of the negative pressure chamber 13, and also a recirculation funnel part 16 whose upper end opening 16a is opened in a lower position than the upper end edge of the chamber main body 10a and in the inside of the chamber main body 10a, is erected from the negative pressure chamber 13 toward an upper part. The length of the circumferential edge of the upper end opening 16a of the recirculation funnel part 16 is set longer than the length of the circumferential edge of the lower end opening 16b of the recirculation funnel part 16, arranged in the inside of the negative pressure chamber 13.</p> |
