Diesel Injector Fuel Injector 095000-5760 093400-8750 Denso Injector for Mitsubishi Pajero, Mitsubishi Triton L200, Dongfeng

The role of the injector in the diesel engine is to inject the high-pressure diesel oil sent by the injection pump into the specified spray shape and quality according to the mixture formation requirements, and distribute them in the combustion chamber, and form a good combustible mixture with the air. Therefore, the injector must ensure that there is a certain injection pressure and distance, as well as the appropriate spray cone Angle, so that the combustion particles have the appropriate atomization process · In the quality control of the injector, the opening pressure (i.e. the pressure when the needle valve of the injector is opened and the injection is injected, unit MPa) is an important index. The reduction of the opening pressure will reduce the power of the diesel engine, increase the fuel consumption, and worsen the emission index. However, the reduction of the opening pressure of the injector is the oil pump nozzle industry Common problems exist

National standards stipulate that the opening pressure drop of the injector exceeds 2MPa as a reliability index for fault entry, but the requirements of most diesel engine manufacturers are much stricter than the requirements of 2MPa stipulated in the reliability standard. Some requirements do not exceed 1 MPa, and higher requirements do not exceed 0.5 M Pa1.

Test data

In 1999, the PB35S01 injector of a diesel engine factory in Sichuan reported that the pressure drop exceeded the standard seriously (no more than 0.6M Pa compared to the manufacturer's requirements), which aroused our attention to this problem. We checked the returned products (after loading the machine) and found that one of 20 sets of medium pressure drop of 0.5MPa, 14 sets of 0.7 ~ 1.0mpa, and 4 sets of 1.0 ~ 2.0MPa. 2.0