The air filter assembly includes a filter element, a housing, a bypass pipe, etc. The air filter element is only a component that plays a filtering role in the assembly:
1. Air filters are mainly used in the fields of pneumatic machinery, internal combustion engines, etc., and their role is to provide clean air for these mechanical equipment to prevent these mechanical equipment from inhaling air with impurity particles during work and increasing the probability of abrasion and damage . The main components of the air filter are the filter element and the casing;
2. The filter element is the main filtering part, which is responsible for the filtration of gas, and the casing is the external structure that provides the necessary protection for the filter element. The working requirement of the air filter is to be able to undertake high-efficiency air filtration work, not to add too much resistance to the air flow, and to work continuously for a long time;
3. It is also applied to different degrees in the hydraulic system of hydraulic machinery, mainly used to adjust the pressure difference between the inside and outside of the oil tank of the hydraulic system.

The functions of the car air filter are:
1. Air filter element. When gasoline is burned, clean gasoline and clean air are mixed together, and when burned, the fuel can exert its maximum effect. In most places, the air quality is poor, and the air filter element is more important;
2. If the air filter has not been replaced after the maintenance period, it will become more difficult to inhale the engine. If the oil and gas are not mixed in place, carbon deposits will increase, thereby increasing fuel consumption;
3. The oil filter element can filter out smaller impurities and reduce the abrasion caused by the running of the engine. If there are fewer impurities, friction will be reduced when the engine is running, and fuel consumption will naturally drop.