Diesel Injector Fuel Injector 0445120363 Bosch for Deutz KHD ENGINE

Performance Analysis of Fuel Injector

The main function of the fuel injector is to spray the high-pressure diesel oil from the fuel injection pump into the combustion chamber in the form of mist. Relevant studies have shown that diesel is mainly combusted in a gaseous state in the combustion chamber, so the atomization quality of diesel is particularly important. The atomization of diesel fuel after injection reflects whether the performance of the fuel injector is good. Proper use and maintenance of fuel injectors can better maintain the working performance of fuel injectors, prolong the service life of fuel injectors, reduce the incidence of failure, and improve economic benefits to ensure the voyage rate and economy of ships.

1 Performance analysis of the injector

The nozzle end of the injector is placed in the combustion chamber, and the working conditions are harsh. It is corroded by high temperature, high pressure, high speed and combustion gas, accompanied by the impact movement between the needle valve and the seat surface of the needle valve body, the washing of high-pressure fuel, The high-speed impact between the fuel and the injection hole and the wear of mechanical impurities can lead to poor performance of the injector.

Insufficient fuel injection pressure, decreased elasticity of the pressure regulating bomb tube, enlarged nozzle hole diameter and dripping oil may all lead to poor atomization. In particular, the continuous injection of high-pressure diesel oil will increase the size of the injection hole due to gradual wear, resulting in a drop in injection pressure, shortened injection distance, and uneven mixing of the combustible mixture, which will cause the diameter of the injection hole to exceed the standard range. This is also a normal natural phenomenon. loss phenomenon.