Common-rail oil sprayer
A common rail fuel injector and fuel injector technology, which is applied in the directions of machines/engines, fuel injection devices, engine components, etc. The problem of poor fuel injection sensitivity, etc., can improve the assembly consistency, shorten the fuel injection shutdown delay, and improve the fuel injection sensitivity.
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[0020] A kind of common rail fuel injector of the present invention can refer to attached figure 1 description of.
[0021] The control piston 7 of the fuel injector, the fuel injector body 6 and the orifice 11 form a control cavity 13 . The fuel injector controls the rise or fall of the fuel pressure in the control chamber 13, and then controls the upward and downward movement of the piston 7 in the axial direction through the pressure difference, thereby controlling the movement of the needle valve 1 to control the fuel injection process. By reducing the assembly gap 8 between the top of the control piston 7 and the bottom surface of the orifice plate 11, when the injector sprays oil, after the control piston 7 rises, a throttle ring is formed between the top of the control piston 7 and the bottom 11 of the orifice plate 15. The throttling effect is produced to greatly reduce the dynamic oil return of the injector (such as image 3 shown). In order to better exert the thr...
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