What is the structure of an automobile fuel tank?
3 Answers
An automobile fuel tank consists of a fuel tank cap, baffle plate, fuel gauge sensor, and filler neck. The most commonly used materials for fuel tanks are metal materials (steel plates and aluminum alloy), with additional anti-corrosion, anti-rust, and impact-resistant treatments (such as adding buffer rubber) on the surface. Fuel tanks can be roughly divided into: the tank body, fuel pump, filler pipe, etc. The function of the fuel tank cap: The fuel tank cap is usually designed with claws and a corrugated spring to press a rubber gasket, clamping the edge of the fuel tank opening to ensure sealing. Some caps are equipped with a locking device to prevent detachment or loss. The function of the baffle plate: The fuel tank generally has a baffle plate inside, which separates the return oil area from the pump's suction area, increases the circulation path of the oil, reduces the circulation speed, and helps with cooling, heat dissipation, bubble separation, and impurity sedimentation. The function of the fuel gauge sensor: Installed inside the fuel tank, it is a sliding rheostat linked with the fuel level float. The float and sliding rheostat form a small assembly, connected to the fuel gauge to indicate the amount of fuel in the tank. The function of the filler neck: The filter screen at the filler neck is used to filter out large impurities in the fuel.
The structure of a car fuel tank is primarily composed of materials. For example, older vehicles use steel barrel-shaped bodies, which are strong but prone to rust and heavy. Newer models often use engineering plastics like HDPE, which are lightweight, corrosion-resistant, and can be freely molded to fit the space under the car. The internal design is crucial, featuring partitions or baffles to prevent fuel from sloshing during sudden braking, which could cause vehicle imbalance or damage components. Safety features include a ventilation system and an explosion-proof valve to prevent the risk of explosion due to excessive pressure, especially in high-temperature environments or during long-distance driving. The fuel tank is generally located in the middle of the car's underside, and care should be taken during maintenance to avoid collisions that could lead to oil leaks and fires. I share this because a basic understanding of the structure can help everyone drive more confidently, allowing for early intervention in case of fuel pump failure or inaccurate fuel level readings.
From an internal perspective, the fuel tank is more than just an oil storage container; it integrates critical components such as the fuel pump and fuel level sensor. The fuel pump operates submerged in fuel, supplying it to the engine, while the sensor measures the remaining fuel using the float principle and transmits the data to the dashboard via wiring. In terms of material, plastic dominates due to its lightweight and superior corrosion resistance compared to metal. The structure also includes hose connection points and sealing rings, which are prone to aging, cracking, and fuel leaks. Repair experience tells us that regular inspections are crucial, especially during rainy seasons to prevent rust. Additionally, the interior is designed with honeycomb or partition structures to buffer fuel sloshing, enhancing driving stability. A minor oversight, such as a blocked pump, can lead to engine stalling and the need for towing, making it something car owners should pay attention to.
