Fungsinya adalah
menyaring Keluar dari partikel dan kelembaban berbahaya dalam sistem gas bahan bakar mesin untuk melindungi nozzle pompa oli, liner silinder, cincin piston, dll., Untuk mengurangi keausan dan menghindari penyumbatan. Saring oksida besi yang terkandung dalam bahan bakar.
Bahkan jika oli diesel diendapkan dan disaring sebelum ditambahkan ke tangki bahan bakar diesel, itu bersih. However, during the refueling process, the diesel fuel will be polluted due to factors such as the fueling tool, the fueling environment, and the fuel tank port are not clean, and during the operation of the diesel engine, Impurities deposited in the fuel system, suspended in the air, can also contaminate the diesel fuel, so the diesel filter on the car is essential, not to mention that the diesel fuel is not necessarily clean before it is added to the fuel Tank.