| 摘要 |
PURPOSE: A reverse flow preventing device for air of a vehicle radiator is provided to prevent air introduced via the radiator from flowing back to be introduced into an engine again, thereby improving the cooling efficiency of the engine and the engine output by preventing the overheating of the engine. CONSTITUTION: A reverse flow preventing device for air of a vehicle radiator includes a variable valve connected to a cap suspension levelling valve(24) for controlling the elevation of a cap(22) and a cap air spring(25) for controlling air supply/discharge with relation to an electronic control unit(26), and a bellows type reverse flow prevention tube(34) mounted between a radiator and the cap to be expanded or retracted by the air supplied via a connection pipe connected to the variable valve.
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