Resources Contact Us Home
Method of operating a piezoelectric actuator

Image Number 5 for United States Patent #7576473.

A method of operating an injector having an injector valve needle and a piezoelectric actuator for controlling movement of the injector valve needle, the method comprising reducing the voltage across the actuator at a first rate (RT1) in order to initiate an initial injection, increasing the voltage across the actuator in order to terminate the injection, and once the initial injection has terminated and before a subsequent injection is initiated, reducing the voltage across the actuator at a second rate (RT2; RT3), which is lower than the first rate (RT1), so as to de-energise the actuator but without initiating an injection. The invention ensures the injector spends a significantly reduced period of its life with a high voltage across its actuator.

  Recently Added Patents
Color stable manganese-doped phosphors
Switching module and switching synchronization system
Interference suppressing OFDM system for wireless communications
Vacuum cleaner filter adapter ring
Storing a location within metadata of visual media
Cooking oven with energy saving mode and method
Air driven alternators for battery powered vehicles
  Randomly Featured Patents
Wave flame control
Recovery of uranium from wet-process phosphoric acid
Image forming apparatus
Tape guide drive mechanism for magnetic recording-reproduction device in which the tapes are driven by a slide member driven directly by cam
Halftone screen using spot function to rank pixels following one or more design rules
Knee-joint orthesis
Selectively alterable intermittent tattoo ink and system
Pedal apparatus of electronic musical instrument
Operational amplifier with feed-forward compensation circuit
Tracking the validity of cache frames in digital movie editing