Concorde V6-3.2L VIN J (2000)
Fuel Injector: Description and Operation
Fuel Injector
Fuel Injector Location - Typical
The injectors are positioned in the cylinder heads with the nozzle ends directly above the intake valve port. The fuel injectors are electrical solenoids.
The injector contains a pintle that closes off an orifice at the nozzle end. When electric current is supplied to the injector, the armature and needle move a
short distance against a spring, allowing fuel to flow out the orifice. Because the fuel is under high pressure, a fine spray is developed in the shape of 2
streams. The spraying action atomizes the fuel, adding it to the air entering, the combustion chamber.
The PCM provides battery voltage to each injector through the ASD relay Injector operation is controlled by a ground path provided for each injector by
the PCM. Injector on-time (pulse-width) is variable, and is determined by the PCM processing all the data previously discussed to obtain the optimum
injector pulse width for each operating condition. The pulse width is controlled by the duration of the ground path provided.
Fuel injectors are fired one crankshaft revolution before TDC compression. When cylinder # 4 is at TDC compression the injector for cylinder # 1 will
be energized.
