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
Solar cell using polymer-dispersed liquid crystals
High surface area composition for use in the catalytic hydroconversion of a heavy hydrocarbon feedstock, a method making such composition and its use
Topology discovery, control channel establishment, and datapath provisioning within an aggregation network with centralized control
Control method and allocation structure for flash memory device
Integrated circuit with electromagnetic intrachip communication and methods for use therewith
Profiling activity through video surveillance
Graphical communication user interface with graphical position user input mechanism for selecting a display image
  Randomly Featured Patents
Optical device and fusion seal
Delay circuit and method with delay relatively independent of process, voltage, and temperature variations
Composition for hybrid seed production, process for the preparation of such composition and use thereof
Liquid crystal display array substrate and its manufacturing method
Image processing device
Speaker housing and sound reflector stand
Fluorescent maleimides and uses thereof
Surge protector assembly with ground-connector status indicator circuitry
Apparatus and method for optical guidance system for automatic guided vehicle
Method for producing flat or arcuate glass plates