The function of automobile filter is to filter impurities or gases. High filtering performance of automobile filter (cleaning effect); Long life (large catch); Durable vibration, high durability, no dust leakage; Water resistance, will not block the entry of air, simple and light loading and unloading. The following is the classification of automotive filters:

1. Air filter, the air filter is installed in front of the carburetor or intake pipe to filter dust and sand in the air and ensure sufficient and clean air in the cylinder;
2. The engine oil filter is located in the engine lubrication system, which is used to filter harmful impurities in the engine oil from the oil pan and supply clean engine oil to the crankshaft, connecting rod, camshaft, supercharger, piston ring and other motion pairs to lubricate, cool and clean, thus extending the life of these parts;
3. Air conditioner filter, commonly known as pollen filter, is used to filter the air entering the compartment from outside to improve the cleanliness of the air;
4. The fuel filter is used to filter harmful particles and water in the engine fuel gas system, so as to protect the oil pump nozzle, cylinder liner, piston ring, etc., reduce wear and avoid blockage. Filter the iron oxide contained in the fuel.