F 350 4WD Super Duty V8-6.4L DSL Turbo (2008)
Two Stages of Injection
^ Main Injection
^ End of Main Injection
Stages of Injection
^ The injection cycle has two (2) stages.
^ Main injection.
^ End of main injection.
^ This injection system is capable of performing both steps of the injection cycle up to 5 times per firing cycle.
Pre-Main Injection
^ The piezo electric fuel injector is constantly being filled with fuel via the high pressure fuel injection pump.
^ High pressure fuel from the high pressure fuel injection pump enters the following areas:
- control piston chamber (2).
- spring side of the valve mushroom (4).
- high pressure chamber (3).
^ The needle control spring (9) holds the needle on its seat so that fuel cannot enter the combustion chamber.
^ The piezo actuator (1) is in a non-energized state.
