Electro-Magnetic Injecto - Lifan 620 Maintenance Manual

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r (Fig. 1-13)

8. Electro-magnetic injecto

Fig1-13
(1) Function: According to the orde from the ECU, the injector will carry out fuel injection and
atomization within a required time for the engine
(2) Structure and principle: The ECU will send electric pulse to the fuel injector coil to form
magnetic force. When the magnetic force is high enough to overcome the joint force of return
spring pressure, pintle valve gravity, and friction, the pintle valve begins to rise and the fuel
injection starts. The maximum rise of the pintle valve will not exceed 0.1mm. When the fuel
injection pulse stops, the pressure of the return spring will close the pintle valve.
(3) Connection of the wiring diagram (Fig. 1-14)
Fig1-14
Installation notes: The plugs for certain fuel injectors should be selected as per requirement. To
facilitate installation, it is recommended to apply clean silicon-free oil on the surface of the upper
O-ring connected to the fuel distribution pipe. Take care not to pollute the internal of the injector
and the injection hole by the oil. Install the injector vertically into the injector seat and fix the
injector on the seat with a clip.
Note: For vehicles out of use for a long time, the adhesive gasoline within the injector can make
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