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What is the composition of a car fuel tank?

1 Answers

MaximusDella

07/29/25 11:20am

Car fuel tanks are composed of a fuel tank cap, baffle plates, fuel gauge sensor, and filler neck. The fuel tank is used to store gasoline, and its quantity and capacity vary depending on the vehicle model. Ordinary cars typically have only one fuel tank, while off-road vehicles often have two fuel tanks to meet special requirements. The functions of each component are described as follows: Fuel Tank Cap: The fuel tank cap is usually designed with claw-type fasteners and a rubber gasket pressed by a corrugated spring to clamp around the fuel tank opening, ensuring a tight seal. Some caps are equipped with a locking device to prevent detachment or loss. Baffle Plates: The fuel tank generally contains baffle plates, which serve to separate the return fuel area from the pump's suction area, increasing the circulation path of the fuel, reducing the circulation speed, and facilitating cooling, heat dissipation, bubble separation, and impurity sedimentation. Fuel Gauge Sensor: Installed inside the fuel tank, the fuel gauge sensor consists of a sliding rheostat linked to a fuel level float. The float and sliding rheostat form a small assembly, which is connected to the fuel gauge to indicate the amount of fuel in the tank. Filler Neck: The filler neck filter screen is designed to filter out large impurities in the fuel.

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