Abstract: Nowadays, the use of paper-core air filters in automobile engines is becoming more and more common. However, some enhancers still have prejudices against paper-core air filters and believe that the filtering effect of paper-core air filters is not good.

Nowadays, the use of paper-core air filters in automobile engines is becoming more and more common, but some enhancers still have a prejudice against paper-core air filters and believe that the filtering effect of paper-core air filters is not good. In fact, the paper core air filter has many advantages compared with the oil bath air filter:

1. The filtration efficiency is as high as 99.5% (the oil-bath air filter is 98%), and the dust transmission rate is only 0.1%-0.3%;

2. The structure is compact, and it can be installed in any position without being restricted by the layout of vehicle parts;

3. No oil is consumed during maintenance, and a large amount of cotton yarn, felt and metal materials can be saved;

4. Small quality and low cost.

It is very important to use a good paper core when sealing the air filter to prevent unfiltered air from bypassing the engine cylinder.

1. During installation, whether the air filter and the engine intake pipe are connected by flanges, rubber pipes or directly, they must be tight and reliable to prevent air leakage. Rubber gaskets must be installed on both ends of the filter element; fixed air filter The wing nut of the outer cover of the filter should not be tightened too tightly to avoid crushing the paper filter element.

2. During maintenance, the paper filter element must not be cleaned in oil, otherwise the paper filter element will become invalid and easily cause a speed accident. During maintenance, you can only use vibration method, soft brush removal method (to brush along the wrinkles) or compressed air blowback method to remove dust and dirt attached to the surface of the paper filter element. For the coarse filter part, the dust in the dust collection part, blades and cyclone tube should be removed in time. Even if it can be carefully maintained every time, the paper filter element cannot fully restore its original performance, and its air intake resistance will increase. Therefore, generally when the paper filter element needs to be maintained for the fourth time, it should be replaced with a new filter element. If the paper filter element is broken, perforated, or the filter paper and the end cap are degummed, it should be replaced immediately.

3. When using, take care to prevent the core air filter from getting wet by rain, because once the paper core absorbs a large amount of water, it will greatly increase the air intake resistance and shorten the mission. In addition, the paper core air filter should not be in contact with oil and fire.

4. Some vehicle engines are equipped with cyclone air filters. The plastic cover at the end of the paper filter element is a diversion cover. The blades on the cover rotate the air. 80% of the dust is separated under the action of centrifugal force and collected in the dust collector. Among them, the dust reaching the paper filter element is 20% of the inhaled dust, and the total filtration efficiency is about 99.7%. Therefore, when maintaining the cyclone air filter, be careful not to miss the nutrient diversion cover on the filter element.