| 摘要 |
By fusion welding joining surfaces 22 at distal ends of protruding portions 12a, 13a which are made to protrude, respectively, from an upper wall 12 and a lower wall 13 of a tank main body 11, the protruding portions 12a, 13a can not only increase the rigidity of the tank main body 11 but also function as baffle plates for preventing the movement of fuel therein. In addition, a passageway 23 is formed along the joining surfaces 22 at the distal ends of the protruding portions 12a, 13a in such a manner as to allow the passage of fuel, and the passageway 23 so formed can not only prevent a violent rebound of fuel that collides against the protruding portions 12a, 13a to thereby enhance further the baffle plate effect but also implement a smooth vapor-liquid separation within the tank main body 11. Moreover, since the passageway 23 is formed along the joining surfaces 22 at the distal ends of the protruding portions 12a, 13a, the formation of the passageway 23 is eased to an extreme extent. |
