Method of controlling a solenoid actuated fuel injector
AssigneeDelphi Automotive Systems Luxembourg SA
InventorsPeter Baur, Heise Volker
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Abstract
A method of controlling the operation of a solenoid activated fuel injector, actuator being operated by applying a activation pulse profile to the solenoid. The method includes measuring the voltage across, or current through, the solenoid during a time period of the valve closing phase, subsequent to a valve opening phase. The method also includes determining at least one parameter from the measuring step. The method also includes controlling and varying the activation pulse profile during a subsequent activation/fueling cycle of the fuel injector based on the parameter.
Claims12
A method of controlling operation of a fuel injector, said fuel injector including a valve actuated by an actuator controlled by a solenoid, said actuator being operated by applying an activation pulse profile to said solenoid, said method comprising:
- a) measuring a voltage across, or a current through, the solenoid during a time period of a valve closing phase, subsequent to a valve opening phase;
- b) summing said voltage or said current over said time period;
- and
- c) controlling and varying the activation pulse profile during a subsequent activation/fueling cycle of said fuel injector based on said sum from step b).
A method of controlling operation of a fuel injector, said fuel injector including a valve actuated by an actuator controlled by a solenoid, said actuator being operated by applying an activation pulse profile to said solenoid, said method comprising:
- a) measuring a voltage across the solenoid during a time period of a valve closing phase, subsequent to a valve opening phase;
- b) summing said voltage over said time period;
- and
- c) controlling and varying the activation pulse profile during a subsequent activation/fueling cycle of said fuel injector based on said sum from step b).
Dependencies are inferred from the claim text.