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
Non-volatile memory and method having efficient on-chip block-copying with controlled error rate
Method and system of channel detecting and reporting, terminal, and management center
Method for forming a film
Combination of a microorganism and a phytosphingosine derivative, composition, methods of use
Server chassis
Controller interface providing improved data reliability
  Randomly Featured Patents
Adaptive power management in imaging systems
System and method for identifying similar media objects
Thin film transistor with plural channels and corresponding plural overlapping electrodes
Sugar-free coating obtained by hard coating and process for producing it
Slotted bow tie antenna with parasitic element, and slotted bow tie array antenna with parasitic element
Display tube assembly and mounting process thereof
Light fitting
Plugs composed of two rubbers having different moduli of extension used for repairing pneumatic tires
Dual band and multiple band antenna