Diesel Injector Fuel Injector 0445120110 Bosch for Yuchai Engine

How Injectors Work

When the fuel supply group of the fuel injection pump supplies fuel, the fuel pressure is increased, and the fuel is sent to the fuel injector, and the clean oil that is further filtered through the oil filter enters the ring around the injection needle (needle valve) through the oil passage on the body and the oil filter. Shaped high-pressure chamber, the oil pressure acts on the pressure-bearing cone surface of the needle to form an axial thrust that moves the needle along the axis. When the thrust reaches the opening pressure of the injection needle (such as 12V150 engine, the opening pressure of the injection needle 21+/-Mpa. BFL413F engine, when the opening pressure of the injector needle is 18+0.8Mp), the injector overcomes the spring force to open the nozzle hole, and the high-pressure fuel enters the combustion chamber uniformly, finely and evenly from the nozzle hole. When the oil supply of the oil supply group of the fuel injection pump ends, the oil pressure drops rapidly, the injection needle is seated quickly under the action of the spring force, and the fuel injection stops.

The above is the working principle of the injector. Generally speaking, this is a very technical work process. If the workmanship of the injector is not good enough. It's not just the injectors themselves that are prone to damage. More seriously, it is likely to cause the entire engine to stop working. Therefore, this kind of industrial products that require high-level production cannot choose low-quality products for cheap.