| 摘要 |
PURPOSE: A fuel supply device for a vehicle is provided to improve the pourability of the fuel and durability of the fuel tank by returning fuel to a fuel tank through an air tank unit. CONSTITUTION: A fuel supply device for a vehicle comprises a fuel tank, a canister and an air pump unit(50). The canister installs to the fuel tank. The canister is connected to the inside of the fuel tank through a vapor line. The canister collects the evaporative gas inside a fuel tank unit. The air pump unit locates on the flow path of a vent-line(37) connecting with the fuel tank and the canister. The air pump unit compresses the air by the inertial force according to the acceleration/deceleration of the vehicles. A housing has a first air discharge unit(52) and a second air discharge unit(53). The piston rod is installed in the inner structure of the housing.
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