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What is the function of the air filter in car maintenance?

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  • 2025-10-15

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Among the numerous items in car maintenance, the air filter, although seemingly insignificant, plays a crucial role. It is mainly responsible for filtering the air entering the engine, providing clean and sufficient oxygen for the engine to ensure its normal operation.

First of all, cleaning the air is the core function of an air filter. During the operation of a car, the air contains a large amount of dust, pollen, bacteria and other tiny particles. If these impurities directly enter the engine, they will accelerate the wear of internal components of the engine, especially key parts such as piston rings and cylinder walls. For instance, dust particles may act like sandpaper, scratching the cylinder wall when the piston moves, leading to a decline in cylinder sealing, weakened power output, and increased oil consumption at the same time. The air filter is like a solid defense line, effectively intercepting these impurities and keeping the air entering the engine clean, thereby extending the engine's service life.

Secondly, air filters help improve fuel economy. When the engine takes in clean air, the fuel can burn more fully. This is because clean air provides sufficient oxygen for combustion, enabling better mixing of fuel and air and achieving a more efficient combustion process. On the contrary, if the air filter is clogged or has poor filtering effect, the amount of air entering the engine will decrease, and the fuel cannot be fully combusted, which will cause fuel waste and increase the vehicle's fuel consumption. According to relevant research, a well-functioning air filter can improve a vehicle's fuel economy by 5% to 10%.

Furthermore, the air filter also has a significant impact on the power performance of the engine. Sufficient clean air can ensure that the engine operates normally under various working conditions, making the engine's power output more stable and powerful. In situations where high power output is required, such as acceleration and climbing slopes, clean air can enable the engine to obtain sufficient oxygen in a timely manner, thereby providing more powerful performance. If the air filter malfunctions, the engine may experience insufficient power, slow acceleration and other issues, which will affect the driving experience.

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Dong Sen Filters

Qinghe County Dongsen Auto Parts Co., Ltd. is located in Qinghe County, Xingtai City, Hebei Province. It was established in 2024. Although the company was established a short time ago, it has more than 10 years of production experience. We are a manufacturer specializing in the production of air filters, air conditioning filters and oil filters. The filters produced by our factory serve the domestic and foreign markets and have won unanimous praise from customers in Southeast Asia, Africa, South America and other regions.