What is the principle of an oil filter?

[VonKai]

The principle of an oil filter is: 1. Pure mechanical separation, commonly seen as mesh filtration, where the filter material has small holes of a certain size on its surface. Solid particles in the oil larger than these holes are blocked on the outer surface of the filter material; 2. Centrifugal separation involves passing the oil through a high-speed rotating rotor, where impurities are thrown to the inner wall of the rotor by centrifugal force and separated from the oil; 3. Magnetic adsorption uses a permanent magnet to attract iron particles in the oil, preventing them from circulating in the oil and damaging engine components. The oil filter is one of the four filters, the other three being the air filter, cabin air filter, and fuel filter. The function of the oil filter is to remove impurities from the oil, protecting the engine from wear.