Why Does a Car Fuel Tank Generate Gas?
1 Answers
The reason for gas generation in the fuel tank is due to gasoline being a highly volatile fuel. The specific details are as follows: High temperatures causing the fuel pump in the tank to heat up: During hot summer weather, the fuel pump inside the tank also heats up. Both gas and liquid expand when heated, with gas having a higher expansion rate than liquid. However, the entire tank space is a sealed container with a fixed volume, so the pressure generated by the gas sealed inside the tank is greater than the external atmospheric pressure. When we open the fuel tank cap, the pressurized gaseous gasoline sprays out from the tank. Clogged carbon canister: A malfunctioning carbon canister can also cause the tank cap to open and gas to spray out. Similarly, during summer, the fuel inside the tank can easily experience an imbalance in internal and external air pressure, and the rapidly rising temperature prevents the carbon canister from promptly handling the pressure imbalance. This results in gas being present when the fuel tank cap is opened.