Fuel Injector: Description and Operation

The fuel injectors are:
- electro-mechanical devices which both meter and atomize fuel delivered to the engine.
- mounted in the lower intake manifold and fuel injection supply manifold.
- positioned so that their tips direct fuel just ahead of the engine intake valves.

The fuel injector bodies consist of:
- solenoid and
- valve assembly.

An electrical control signal from the Powertrain Control Module (PCM) activates the injector solenoid, allowing fuel to flow. Since the fuel injector flow is fixed and the fuel pressure drop across the injector tip is constant:
- fuel flow to the engine is regulated by how long the solenoid is energized.
- fuel is atomized at the point of discharge.