System and method to control spool stroke motion

Details System and method to control spool stroke motion System and method to control spool stroke motion

2007-05-15

2007-05-15

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

Reexamination Certificate

active

10969047

ABSTRACT:
An oil activated fuel injector which provides a pilot quantity of fuel prior to the main fuel injection event. A control system for a fuel injector includes a sensor for providing a signal to a control which is indicative of an opening motion of a spool. The control initiates a pull back of the spool, upon receipt of the signal, to eliminate a bounce back phenomenon of the spool during an injection of a pilot quantity of fuel. The signal may be representative of a pressure of working fluid or fuel, as well as a position or acceleration of the spool.

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