| 摘要 |
PURPOSE: A lightened exhaust pipe of a non-circular cross-section is provided to reinforce a decrease in rigidity caused by lightening the exhaust pipe by a plurality of protrusion units. CONSTITUTION: A lightened exhaust pipe(200) of a non-circular cross-section comprises a body(210), protrusion units(211), opening units(220), bending units(230), and a connection unit(240). The protrusion units are protruded in the outer surface of the body successively from the opening unit in one toward the opening unit in the other end. The opening units are positioned in both end portions of the body and make exhaust gas flow in and out from the body. The bending units are formed by bonding one surface of the body. The connection unit is positioned in both end portions of the body, thereby connecting the exhaust pipe to other parts. |
