| 摘要 |
PROBLEM TO BE SOLVED: To provide an aqueous urea tank reducing thermal strain by welding a main body in a position having high surface rigidity in the vicinity of a bent part to form a box shape, and improving pressure resistance and earthquake resistance by providing recessed parts on side faces. SOLUTION: The tank main body is a sheet-metal box shaped to be a rectangular parallelepiped of which front face has narrow width. On the side faces, the plurality of recessed parts are provided. Both end parts are jointed in the vicinity of a folding line on the side face, and at least one of the recessed parts is arranged in the vicinity of the jointed line. This structure enhances wall face strength. COPYRIGHT: (C)2006,JPO&NCIPI
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