In order to reduce the friction between the moving parts in the engine, reducing wear and tear parts, oil being transported to the surface of friction of all moving parts, lubricating oil film is formed, lubrication. Oil itself contains a certain amount of gum, trash, water and additives. In both the engine working process, metal swarf into, the entry of debris in the air, oil-n-oxide, and debris in the oil gradually increased.
If the oil without oil filter directly into the lubrication, oil will be found in debris into motion under friction surface, accelerated wear and tear parts, reduce the service life of the engine. Oil filter is to filter the oil debris, Colloid and water pumping clean oil to lubrication.
As motorists need to know mechanical knowledge, change oil and oil filter regularly, this is necessary. Quality must be replaced each time the oil change oil filter, through use of the filter, the filter efficiency will drop, the oil pressure can be significantly reduced through the filter.
Although oil pressure drop to a certain extent, filter bypass valve opens, the oil will enter through the bypass circuit in case of lack of oil pressure, but at this point into the unfiltered oil motor oil, impurities shall be brought into line, increased mechanical wear, severe, impurities in the oil can clog oil passages, caused by mechanical failure. Therefore, directly affects the quality of the oil filter oil for engine lubrication effect.
Oil filter in engine lubrication systems, although isolated, impurities in the environment it is difficult to enter the engine, but there are impurities in the oil.
Impurities are divided into two categories: one is the engine parts wear down in the operation of metal grains and supplements when oil from sand-lime filler in the dust; the other is organic, black cement-like, which is oil under high temperature in operation process, substances resulting from chemical changes. They worsen the oil, lubricating effect reduced and will adhere to moving parts, increasing resistance.
While the former type of metal particle will accelerate the engine crankshaft, camshaft, shaft and bearing and the lower part of the cylinder and piston ring wear, the consequences are: the other part gap increases, increase in oil demand, oil pressure drop, and cylinder liner and piston ring clearance, oil up to the top of the piston rings, causing burning oil, increase the amount of oil and the formation of carbon deposit. Fuel discharge into the oil sump to dilute the oil, oil failure. These are against the machine performance and cause engine smoke, severe decline in power, forcing the overhaul in advance.