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
Fabrication of high gradient insulators by stack compression
Provision of downlink packet access services to user equipment in spread spectrum communication network
Reuse of static image data from prior image frames to reduce rasterization requirements
Methods and systems for use in tracking targets for direction finding systems
Automatic adjustment of devices in a home entertainment system
Method for configuring analog-to-digital converter keys and non-transitory machine readable medium storing program code executed for performing such method
Electronic devices with voice command and contextual data processing capabilities
  Randomly Featured Patents
System and method for treatment of anal incontinence and pelvic organ prolapse
Light collection apparatus, system and method
Oxygen bottle holder
On-chip phase microscope/beam profiler based on differential interference contrast and/or surface plasmon assisted interference
Dynamic insertion of a speech recognition engine within a distributed speech recognition system
Double-folding seat for vehicles
Intelligent alarm system with snow sensor
Window sash frame extrusion
Device for the control of gas exchange valves
End-to-end reliable messaging with complete acknowledgement