Diesel Injector Fuel Injector 5367913 Denso Injector for Cummins

The fuel injection start process of the injector: the coil of the solenoid valve is energized, the low-pressure oil outlet is opened, the fuel in the control chamber is discharged through the small hole at the lower end of the control slide valve and flows into the low-pressure chamber, the needle valve is separated from the needle valve seat, and the fuel is injected. into the cylinder. The fuel injection stop process of the injector: the solenoid valve is powered off, the low-pressure oil outlet is closed, and the high-pressure fuel enters the pressure storage chamber on the slide valve through the small hole on the control slide valve. When the fuel in the pressure storage chamber exceeds a certain pressure , the control slide valve falls under the action of hydraulic pressure, the fuel flows into the control cavity through the hole on the control slide valve, the needle valve moves to the valve seat and seals with it, and the fuel injection ends.

Judging whether the fuel injector is normal: Detect the fuel injector on special equipment, and visually observe the working condition of the fuel injector. It is normal when the fuel spray is misty and does not leak, and the fuel injection pressure of the fuel injector is less than 30+0.80 MPa. The fuel injection pressure is low, the atomization is poor, and the diesel combustion is incomplete, causing the engine to emit white smoke. If there is dripping, adjust, overhaul or replace the injector. Injector problems: First, the pressure regulating spring of the fuel injector is weakened and can be adjusted; second, the pressure regulating spring of the fuel injector is broken and needs to be replaced; If the charcoal is blocked, replace the needle valve coupler.