Fuel Injector: Description and Operation

PURPOSE/OPERATION
- The Multipoint Fuel Injection (MFI) System employs a gallery type (side-feed type) Fuel Injector.
- The gallery type Fuel Injector is installed in the Fuel Pipe to allow cooling of the Injector by the fuel.
- The features of this type of Fuel Injector are as follows:
1. High heat resistance.
2. Low driving noise.
3. Easy to service.
4. Small size.

- The Fuel Injector injects fuel according to the valve open signal received from the Engine Control Module (ECM).
- The nozzle is attached on the top of the Fuel Injector. The Needle Valve is lifted by the Solenoid Coil through the plunger on arrival of the valve open signal.
- Since the injection opening the lifted level of valve and the regulator-controlled fuel pressure are kept constant, the amount of fuel to be injected can be controlled only by the valve open signal from the ECM.