Fuel engine nozzle of the injector body, lifters, injectors lotus parts, springs and other pieces composed regulator. The high-pressure fuel injection pump inlet pipe work from the injector connector body and the injector needle through the body of the oil passages into the middle of the ring one needle valve body high pressure oil chamber, hydraulic pressure central role in the needle bevel formed on an upward axial thrust, thrust over when this pressure regulator spring, the needle will move the fuel valve orifice through four bottom to spray atomized state of human combustion chamber. When the oil supply interruption, oil flow pressure drops, the needle quickly to lower the pressure regulator spring, the lower sealing cone needle pressed against the sealing cone and needle valve body orifice is closed, the fuel injection is stopped .
Nozzle repair methods : Fuel engine nozzle in which working conditions are very harsh, high mechanical and thermal loads, combined with improper installation and adjustment, often adverse spray orifice drop of oil, coke, needle stuck even other faults . when the nozzle is not fuel injection, you should check whether there is oil in the air, if the air and remove ; pump oil is normal ; fuel system for leaks ; injector needle is stuck in the needle hole, if necessary dismantling the cleaning to be repaired.
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