| 摘要 |
PROBLEM TO BE SOLVED: To obtain a fuel tank structure capable of certainly suppressing the deformation of a fuel tank by making a pair of upper and lower interfering portions at the time of tank deformation due to negative pressure abut on each other. SOLUTION: On a top wall portion 10A and a bottom wall portion 10B of the fuel tank 10, an upper side stand-off 12 and a lower side stand-off 14 are formed so as to vertically oppose to each other and keep a clearance. The lower side stand-odd 14 has a larger diameter than that of the upper side stand-off 12, and is formed with an ordinary surface 20A on which a projecting end portion 18 of the upper side stand-off 12 abut when the negative pressure acts, and an annular rib 20B preventing slipping-off of the projecting end portion 18. Therefore, the deformation of the fuel tank 10 can be certainly suppressed when the negative pressure acts. COPYRIGHT: (C)2006,JPO&NCIPI
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