Filter Tasks in a Combustion Engine Regarding Fuel， Oil and Air 

Causes for engine wear 

Sand and dirt particles reach the engine through fuel and intake air.

Metal particles，etc. from abrasion of the moving engine components，reach the engine oil. 

As well as residues (e.g. soot) from incomplete combustion (blow-by gases).

Fibers，plastic and rubber particles may block the oil circulation.

Task of engine filters

Separation of wear-enhancing particles.

Separation of contaminants which might block the circulation.

Water separation to prevent corrosion, icing and damage to operating agents and devices. 

Wear protection of bearing and working surfaces of all moving components in the engine.