In the internal combustion engine system, the air filter is installed in front of the intake pipe, which is mainly used to filter out the dust and grit in the air and ensure that sufficient and clean air enters the cylinder. If pollutants such as carbon black and particles enter the engine together with the air, the engine will be worn. Therefore, the air filter should be replaced regularly.

41A216508P4 air filter ordered by Canadian customers， which use 800 pieces for diesel locomotive system . The air flow of the filter is 5-8 m3/min to meet its air request