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What are the characteristics and uses of Oil Filter?

2022-03-12

Oil Filter is also known as oil grid. It is used to remove impurities such as dust, metal particles, carbon deposits and soot particles from oil to protect the engine.

Oil Filter can be divided into full flow and split flow. The full-flow filter is connected in series between the oil pump and the main oil passage, so it can filter all the lubricating oil entering the main oil passage. The diverter filter is connected in parallel with the main oil passage to filter only part of the lubricating oil sent by the oil pump.

Oil Filter Features:

Filter paper: The oil filter has higher requirements on the filter paper than the air filter, mainly because the temperature of the oil varies from 0 to 300 degrees. Under the severe temperature change, the concentration of the oil also changes accordingly. It will affect the filter flow of the oil. The filter paper of a high-quality oil filter should be able to filter impurities under severe temperature changes, while ensuring sufficient flow.
●Rubber sealing ring: The filter sealing ring of high-quality oil is made of special rubber to ensure 100% oil leakage.
●Backflow suppression valve: only available in high-quality oil filters. When the engine is turned off, it prevents the oil filter from drying out; when the engine is re-ignited, it immediately creates pressure to supply oil to lubricate the engine. (also known as check valve)

●Relief valve: only available in high-quality oil filters. When the outside temperature drops to a certain value or when the oil filter exceeds its normal service life, the overflow valve opens under special pressure, allowing unfiltered oil to flow directly into the engine. Nevertheless, impurities in the oil will enter the engine together, but the damage is much less than the damage caused by no oil in the engine. Therefore, the relief valve is the key to protect the engine in an emergency.

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