The fuel filter is on the line between the fuel pump and the body into the oil port. The function of the fuel filter is to remove solid debris containing iron oxide and dust in the fuel to prevent blockage of the fuel system (especially the injector nozzle). Reduce mechanical wear to ensure stable operation of the engine and improve reliability. The structure of the fuel is constructed of a aluminum shell and an inner stainless bracket, which is equipped with a high-efficiency filter paper on the bracket, and the filter paper is chrysanthemum shape to increase the flow area. E-spray filters cannot be universal with the oil filter. Since the electron-spray filter often withstands the fuel pressure of 200-300 kPa, the filter pressure strength of the filter is generally required to reach 500 kPa, and the oil filter is not necessarily necessary to achieve such high pressure.