An automobile air filter device primarily responsible for removing particulate matter from the air. When piston type machinery (internal combustion engine, reciprocating compressor, etc.) works, if the inhaled air contains dust and other impurities, it will aggravate the wear of the parts, so it must be equipped with air filters. The air cleaner is composed of a filter core and a shell. The main requirements of air filter are high filtration efficiency, low flow resistance, can be used for a long time without maintenance.

A car engine is a very delicate piece of machinery, and even the smallest impurity can damage it. Therefore, before the air enters the cylinder, it must be filtered by the fine air filter before it enters the cylinder. Air filter is the patron saint of the engine, the state of the air filter is related to the length of the life of the engine. If the car used dirty air filter, will make the engine intake is insufficient, the fuel combustion is not complete, resulting in the engine work is not stable, power decline, increase in fuel consumption phenomenon. Therefore, cars must keep their air filters clean.