What is the working principle of a motorcycle centrifugal oil filter?

[SanPaul]

Through the centrifugal force generated by high-speed rotation, the particulate impurities caused by wear in the engine oil are thrown to the bottom of the filter and collected, achieving the filtering effect. Gravity separation: In the sedimentation tank, the solid particles with higher density gradually sink under the effect of Earth's gravity, eventually making the liquid clear, with the lighter-density liquid remaining on the upper layer. Gravity separation requires a long time and occupies a large area. Centrifugal separation: In the high-speed rotating drum, the multi-component mixture with different densities forms a circular ring under the effect of centrifugal force. The solid particles with higher density move outward and accumulate on the drum's wall, while the lighter-phase liquid stays in the inner layer. Since the centrifugal force generated by the high-speed rotation of the drum is much greater than gravity, centrifugal separation can achieve the effect of gravity separation in a very short time, especially when gravity separation is not feasible, only centrifugal separation can be applied.