| 摘要 |
PURPOSE: Structure of an exhaust pipe is provided to reduce the booming sound and noise of the exhaust gas by actively controlling the exhaust pressure of the exhaust gas, to control the flow characteristic of the exhaust gas at the entire operation range of an engine, and to improve productivity and durability by compacting structure. CONSTITUTION: A capacity variable space(3) is formed in a variable unit(2) formed on an exhaust pipe(1). A guide groove(10) formed on the bottom face of the exhaust pipe facing the variable unit and guiding the movement of an operating plate(6) is formed in a housing(4). A slider(8) is movably installed in the housing. A spring(9) elastically supports the slider. The operating plate having plural holes(7) are formed vertically on the slider. Depending on the change of the pressure of the exhaust gas discharged from an engine, the operating plate moves promptly to vary the volume of the exhaust gas.
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