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Why should the various filters on the car be replaced regularly?

Oil filter

The oil filter is called the "kidney of the engine", and its main function is to filter impurities in the oil and provide clean oil to the engine. Because the engine will produce a large amount of carbon deposits, gums, sludge, metal wear debris, etc. during operation, these impurities are mixed in the engine oil, if not filtered out, it will aggravate the wear of the engine. With the oil filter, leaving these impurities on the filter paper of the oil filter, the engine can get clean oil.

What if the oil filter is not replaced for a long time? There is a bypass valve in the oil filter, this valve will open when the oil filter is clogged to prevent the engine from not being lubricated by the oil. If we don't change the oil filter for a long time, the filter paper has too many impurities and the oil cannot pass through, the bypass valve will be opened and the oil will be directly supplied to the engine without filtering. The most popular way is to say that there is no oil filter. At this time, the residual carbon, gum, sludge, metal wear debris, etc. in the oil will enter the lubricating surfaces of the engine along with the flow of the oil, thereby intensifying the engine's Wear.

Air filter

The air filter is called "the mask of the engine", its function is to filter out the sand, impurities, etc. in the air, and provide clean air to the engine. If the unfiltered air enters the engine directly, the hard particles such as sand and impurities in the air will enter between the piston and the cylinder wall, which will aggravate the wear of the cylinder and shorten the service life of the engine.

Fuel Filter

Fuel is the food of the engine, and the power of the engine is converted from fuel combustion. Fuel is divided into gasoline and diesel, and their filters are slightly different. Today we only talk about gasoline filters. The function of the gasoline filter is to filter impurities, gums, etc. in the gasoline, provide clean gasoline to the engine, and prevent "illness from entering the mouth." Because the fuel is inevitably mixed with some impurities during the production and transportation process, a certain amount of moisture will be adsorbed during the storage process, and these impurities will seriously damage the components in the fuel system. For example, the extremely precise fuel injector coupler has an accuracy of only a few microns. If impurities and gums in gasoline enter the coupler, the surface of the coupler will be scratched, which will cause the injector to drip and not open.

Air conditioning filter

Another type of filter in a car is an air conditioner filter. The function of this filter is to filter the air entering the passenger compartment to prevent the occupants in the car from breathing dirty air. It is generally replaced once every 10,000 kilometers, and the cycle can be appropriately extended or shortened according to the local air quality; if it is not replaced for a long time, the air quality in the car will be poor and the air-conditioning volume will be small. At present, the overall air quality in China is not good, so some models use this air-conditioning filter to make a fuss, claiming that their cars have the functions of filtering PM2.5, filtering viruses, etc., which are actually some gimmicks. As long as it is a qualified air conditioner filter, the filtering effect is similar.


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