What is the main function of an air filter

We all know that air filters can undertake high-efficiency air filtration work, and can work continuously for a long time, so what is the main role of air filters, do you know? Let's follow the editor to find out.

The engine has to suck in a large amount of air during the working process, and if the air is not filtered, the dust suspended in the air is sucked into the cylinder, which will accelerate the wear of the piston group and the cylinder. Larger particles enter between the piston and the cylinder, causing a severe "cylinder pulling" phenomenon, which is especially acute in a dry and sandy working environment. The air filter is installed in front of the carburetor or intake pipe to filter out dust and sand particles in the air and ensure that sufficient and clean air enters the cylinder.

Among the thousands of parts of the car, the air filter is a very inconspicuous component, because it is not directly related to the technical performance of the car, but in the actual use of the car, the air filter has a great impact on the service life of the car (especially the engine). On the one hand, if there is no air filter, the engine will inhale a large amount of air containing dust and particles, resulting in serious wear and tear of the engine cylinder; On the other hand, if there is no maintenance for a long time during use, the filter element of the air filter will be filled with dust in the air, which will not only reduce the filtration capacity, but also hinder the circulation of air, resulting in excessive concentration of the mixture and making the engine work abnormally. Therefore, it is crucial to maintain your air filter regularly.

There are generally two types of air filters: paper and oil bath type. Paper filters have been widely used because of their high filtration efficiency, light weight, low cost, and convenient maintenance. The filtration efficiency of the paper filter is as high as 99.5%, and the filtration efficiency of the oil bath filter is 95-96% under normal conditions. The air filters widely used in cars are paper filters, which are divided into dry and wet. For dry filters, once immersed in oil or water, the filtration resistance increases dramatically, so it is important not to come into contact with water or oil when cleaning, otherwise it must be replaced with a new part.

When the engine is running, the air intake is intermittent, which causes the air in the air filter housing to vibrate, and if the air pressure fluctuates too much, it can sometimes affect the air intake of the engine. In addition, the air intake noise will also increase. In order to suppress the intake noise, the volume of the air filter housing can be increased, and some partitions can be arranged in it to reduce resonance.

There are two types of air filters: dry and wet. The dry filter cartridge is made of filter paper or non-woven fabric. In order to increase the area where air can pass through, most of the filters are machined with many fine folds. When the filter element is slightly fouled, it can be blown clean with compressed air, and when the filter element is seriously fouled, it should be replaced with a new element in time.

The wet filter element is made of sponge-like polyurethane material, and some oil should be added dropwise and kneaded by hand to adsorb foreign matter in the air. If the filter is soiled, it can be cleaned with cleaning oil, and if it is excessively fouled, it should be replaced with a new one.

The above is a summary of the editor, but the editor would like to remind everyone that if the filter element is seriously blocked, the power of the engine will decrease, so we should develop a habit of checking the air filter frequently.