Where is the fuel tank vent hole located?

1 Answers
SanGabriel
07/25/25 3:09pm
The fuel tank vent hole is located on the fuel tank cap. There are two valves on the fuel tank: one is an air valve, and the other is a vapor valve. Design origin of the fuel tank vent hole: The position of the fuel tank cap is primarily determined by the traffic regulations of the designer's country: if vehicles in that country drive on the right side, the fuel tank cap will be designed on the right side, and vice versa. The purpose of this design is simple: to facilitate refueling when the car is parked by the roadside. However, with globalization, exceptions to this rule have become more common. Function of the vent hole: There are two valves on the fuel tank: an air valve and a vapor valve. When the fuel pump draws fuel, the pressure inside the fuel tank decreases. When the pressure drops below 98 kPa, the air valve opens to allow gas to enter the fuel tank.
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