| 摘要 |
PURPOSE: A variable intake duct structure of engine is provided to control the air volume according to the progressively segmentalized rpm of an engine. CONSTITUTION: A variable intake duct structure of engine comprises a first air duct(101), a second air duct(102), a third air duct(103), a first switching valve, a second switching valve, and a third switching valve. The air ducts are respectively formed in first, second, and third air ducts. The air ducts are selectively opened and closed according to the RPM of an engine. If the first set revolution is 0~2400RPM, the first switching valve is opened and the second and third switching valve are closed. If the second set revolution is 2400~5500RPM, the first, and the second switching valve are opened and the third switching valve is closed. If the third set revolution is 5500~6400RPM, the first, second and third switching valve are opened.
|
