Basic working principle of oil filter

As shown on the right shows,

Engine oil from the oil pan out of the oil, to a certain pressure (0.3-0.4Mpa), from the mouth into the oil filter, (multiple punching thread cover) filter paper surface into lattice filter, the filter into the center pipe from the outlet (i.e. central threaded hole) flow into the engine the main oil lubrication implementation.

When the cold start engine, or the filter is blocked, causing the oil resistance increases, while the oil pressure will be opened to overcome the by-pass valve spring pressure, the oil from the valve directly into the main oil channel, in order to ensure timely lubrication.

The filter must be replaced regularly because of the increase of impurities in the filter.

Oil filter production process