What is the working principle of an air filter?
3 Answers
Air filter works by using filter media as the main filtration method. When air passes through a filtration-type air filter, the filter paper blocks impurities in the air and adheres them to the filter element, thereby achieving air filtration. An air filter generally consists of an air intake guide, air filter cover, air filter housing, and filter element. The filter element is the main filtration component responsible for gas filtration, while the housing serves as the external structure providing necessary protection for the filter element. The operational requirements of an air filter include performing high-efficiency air filtration without adding excessive resistance to airflow and being capable of continuous long-term operation.
The air filter works like a sieve. When we drive, the engine needs to draw in air to burn gasoline. The air filter is installed at the air intake, filtering the air drawn from outside. It uses special paper or synthetic mesh materials to trap impurities like dust and sand, allowing only clean air to pass through the intake duct into the engine cylinders. This prevents dirt from wearing down the engine's internal precision parts, extending the engine's lifespan. It also helps the fuel burn more efficiently, saving some money on gas. I always remind my friends to check or replace the filter at least every 10,000 kilometers—replace it if it's clogged. Don't underestimate its small size; its role is crucial.
In my daily car use, I've found the air filter to be quite crucial. It's responsible for filtering the incoming air, trapping impurities outside the filter screen, and delivering clean airflow to the engine to aid combustion. If it gets too dirty and clogged, the car may feel sluggish or consume more fuel. Clean air allows the car to run more smoothly, so I make it a habit to check it regularly. If it's dirty, I just buy a new filter and replace it—it only takes a few minutes, saving both money and hassle. This extends the car's lifespan and reduces trips to the repair shop.
