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
Method and system for triggering message waiting indicator delivery
Image forming apparatus having a primary transfer unit, a secondary transfer unit, and a direct transfer unit
Microporous membranes and methods for producing and using such membranes
Telecommunications system and method
Output circuit
Collaborative computing community role mapping system and method
Developing device
  Randomly Featured Patents
Process for pumping a multi-phase gas-liquid mixture by means of the use of a pump
Method of identifying antenna-mode scattering centers in arrays from planar near field measurements
Enhanced steel catenary riser system
Single sided DSX frame
Embroidery device for crochet machines
Active implantable medical device for cardiac resynchronization with automatic optimization of atrioventricular and interventricular delays
Alstroemeria named Flamengo
Combined radio, cassette and CD player
Hydrocracking with a catalyst containing a noble metal and zeolite beta
Frequency stabilized laser system