Oil filters are as important to the engine as the liver is to the human body. There seems to be no more appropriate metaphor for describing the important role of oil filters in engines.
As a vulnerable part of truck, oil filter is replaced together every time the oil is changed. It is precisely because of this characteristic that many fake and inferior mechanical filter products will appear in the market. Faced with the mixed filter products, the choices made by consumers will have a crucial impact on the working life of your car. When you choose oil filter to face the dilemma of low price and excellent quality, it is suggested that you choose high quality filter.
The Function of Oil Filter
Generally, all parts of the engine are lubricated by oil to achieve normal operation, but the metal debris, dust, carbon deposits oxidized at high temperature and some water vapor will be continuously mixed into the oil when the parts are running, which will shorten the service life of the oil for a long time, and may affect the normal operation of the engine in serious cases.
The main function of the oil filter is to filter the impurities in the oil, provide clean oil for the operation of engine components, reduce friction loss of components, maintain the normal operation of the engine and improve the operation efficiency of the engine.
Oil filter structure
A good oil filter is usually composed of filter paper, rubber sealing ring, backflow suppression valve and relief valve.
The filter paper is the key of the oil filter, and the requirement is very high. The main reason is that the temperature of the oil varies from 0 to 300 degrees. Under the drastic temperature change, the concentration of the oil also changes correspondingly, which will affect the filtration flow of the oil. High quality oil filter paper should be able to filter impurities under drastic temperature changes, while ensuring adequate flow.
Rubber seals with special rubber synthetic seals, to ensure 100% oil leakage.
Backflow suppression valve, also known as check valve, can prevent the oil filter from drying when the engine goes out; when the engine is re-ignited, it immediately generates pressure to supply oil to lubricate the engine.
The relief valve is also called by-pass valve. When the external temperature drops to a certain value or when the oil filter exceeds the normal service life, the relief valve will open under special pressure, allowing the unfiltered oil to flow directly into the engine. In spite of this, impurities in the oil will enter the engine together, but the damage is much smaller than that caused by the absence of oil in the engine.
Harm of inferior filters
In order to save production cost, inferior filters usually use poor filter paper, open by-pass valves with unqualified pressure, or have no check valves at all.
Bad filter paper can not effectively filter out the impurities in the oil, and impurities that are not filtered out by filter paper in time will enter the engine crankshaft and bush or valve and valve guide rod and other precision matching parts with the oil. Light cause engine premature carbon deposit, resulting in poor valve seal and engine power decline, heavy will cause engine crankshaft “pad” phenomenon seriously damaged the engine.
Poor bypass valves will open under lower oil pressure, which will make the filter paper lose its original function. At this time, the oil circulated back to the engine by-pass valve not only can not get the filter of the paper filter element, but also can flush the large impurities which have been filtered out by the paper filter element back into the engine through the bypass valve, which brings the engine continuous secondary wear and tear.
Oil filters without reflux suppression valves will cause serious wear and tear between piston rings and cylinder walls, and shorten the life of engines.
Now the machine filter products are mixed, the price is from several yuan to tens of yuan, the quality gap is also huge, inferior machine filter, there is no filtering function at all, long-term use will only hurt the car, car owners save money is not enough to repair the car, it is not worth the loss. For the engine, the function of machine filter is as important as that of oil. Since many car owners are willing to choose a good oil for their car, they also need to add a good machine filter for the good oil.
Post time: Jan-25-2019