Method of controlling a piezoelectric actuator

Details Method of controlling a piezoelectric actuator Method of controlling a piezoelectric actuator

2007-05-21

2010-12-28

Solis, Erick (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C310S316030, C310S317000

Reexamination Certificate

active

07856964

ABSTRACT:
A method for controlling the displacement of a stack of a piezoelectric actuator for use in a fuel injector comprises determining a desired amount of charge (ΔQ) to be added or removed from the stack. The method further comprises determining an operating parameter of the fuel system and selecting a drive current level (PO, SO) and a drive time (topen, tclose) in accordance with the desired amount of charge (ΔQ) and the operating parameter, and driving the drive current through the stack for the drive time (topen, tclose) in order to add or remove the desired amount of charge (ΔQ).

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Japanese Office Action.

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