If the filter element is seriously blocked, the intake resistance will increase and the engine power will decrease. At the same time, due to the increase of air resistance, the amount of gasoline inhaled will also increase, resulting in an excessively rich mixture ratio, which will deteriorate the engine running state, increase fuel consumption, and easily produce carbon deposits. Usually, you should develop the habit of checking the air filter element frequently. According to the specific driving environment, it is recommended to replace the air filter once every 10,000-15,000 kilometers.

The air filter is a device for purifying the air. It consists of a shell and a filter element, and the filter element is arranged in the shell. There are various foreign objects in the atmosphere, such as dust, sand, etc., which will accelerate the wear of the engine, thereby reducing the service life of the engine. Occasionally the tires carry take-off stones which, once inside the engine, can cause serious damage to the engine. An air filter prevents this from happening. In order to increase the air intake, the air filter housing is generally larger, and many racing cars even design part of the frame as an air filter housing to increase its volume. When the engine is running, the intake air is intermittent, which causes the air in the air filter housing to vibrate. If the air pressure fluctuates too much, it will sometimes affect the intake air of the engine. In addition, this time will also increase the intake noise. In order to suppress the intake noise, the volume of the air filter housing can be increased, and some partitions are also arranged in it to reduce resonance.

The filter element of the air filter is divided into two types: dry filter element and wet filter element. The dry filter element material is filter paper or non-woven fabric. In order to increase the air passage area, most of the filter elements are processed with many small wrinkles. When the filter element is slightly soiled, it can be cleaned with compressed air. When the filter element is seriously soiled, it should be replaced with a new one in time. The wet filter element is made of sponge-like polyurethane material. When installing, some oil should be added dropwise and kneaded by hand to absorb foreign matter in the air. If the filter element is dirty, it can be cleaned with cleaning oil, and the filter element should be replaced with a new one if it is too dirty.