The injector is the carrier for ECU to control engine fuel injection. The ECU receives the engine speed signal and the air flow sensor signal as the main control signal of the basic fuel injection volume of the engine.
Receive other sensor signals and various switch signals as correction injection control signals; When the injection pressure is constant, the ECU controls the energizing time of the injector solenoid valve coil.
to achieve precise control of fuel injection.
The injector is a kind of solenoid valve, and its working principle is: when the solenoid coil is energized, the suction force is generated, the needle valve is sucked up, the nozzle hole is opened, and the fuel passes through the shaft needle and the nozzle hole at the head of the needle valve.
The annular gap between them is ejected at high speed to form a mist, which is conducive to full combustion.
There are mainly the following types of injectors:
a.Bore Injectors: Bore injectors are used on direct injection combustion chamber diesel engines. According to the number of nozzles in the head of the injector, it is divided into: single-hole injector, double-hole injector and.
Porous injectors (more than 3), usually the number of nozzles is about 1-7.
b.Shaft needle injectors: The injection of shaft needle injectors is hollow and its shape can be inverted conical or cylindrical.
c.Intake manifold injector: This type of injector does not have a high injection pressure and is also relatively cheap.
d.Fuel injector for direct injection in the cylinder: The working pressure of this fuel injector is very high, and it is also relatively high.
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