What are the effects of filling up a car with fuel?
2 Answers
The effects of filling up a car with fuel include the risk of encountering open flames, clogging the vent hole, and causing damage to vehicle components. Below are the detailed explanations: Risk of encountering open flames: When the fuel tank is overfilled, the expansion of gasoline volume can rupture the tank. Therefore, cars are designed with vent holes. If the fuel is overfilled, it may overflow through these vent holes. Moreover, gasoline is highly volatile, and if it comes into contact with an open flame, it can ignite instantly, causing irreversible damage. Clogging the vent hole: Once the vent hole is clogged, negative pressure is created inside the fuel tank, leading to poor fuel supply or even a complete fuel cut-off. Situations where the engine fails to start right after refueling or experiences stuttering during high-speed driving may be due to an overfilled fuel tank. Damage to vehicle components: Overfilling the fuel tank increases the overall weight of the car, leading to higher fuel consumption. Additionally, overfilling can cause liquid gasoline to enter the pipelines, not only harming the carbon canister but also flowing into the intake manifold, causing the spark plugs to malfunction and even resulting in the vehicle failing to start.
I used to hear people say that filling the gas tank too full is bad for the car, and after driving several cars myself, I found it does have an impact. When the tank is full, gasoline expands in volume and can easily overflow, especially in the summer when high temperatures cause more gasoline to evaporate, putting a heavy load on the charcoal canister, which can easily fail. There's a vent hole in the gas cap; if it gets blocked, the fuel pump has to work harder to draw fuel. Additionally, for every 100 kg increase in vehicle weight, fuel consumption per 100 km increases by about 0.7 liters. Filling up 50 liters of fuel is equivalent to carrying an extra 50 kg. It's recommended to stop filling when the pump automatically clicks off; there's no need to round up by adding that extra half-liter after the click. Keeping the tank overly full for long periods also affects the fuel pump's heat dissipation, and repairing it isn't cheap.
