Robust. Green. Control.

OUR MISSION: Provide BREAKTHROUGH INJECTION CONTROL for the Diesel Industry enabling better emissions reduction and fuel efficiency during the combustion process. Most emission solutions today concentrate on expensive after combustion treatments, but GPDT tackles the issue at its core!

History of the Solenoid-Operated Diesel Fuel Injector
  • Solenoids were applied to fuel injection in 1913. To this day, physics still limits their force and speed.
  • Relatively weak and slow, the solenoid is confined to operating a servo valve in the injector.
    • The servo valve in turn directs fuel pressure to only open or close the injector needle.
  • The solenoid and servo valve cause significant, and now unacceptable, time delays.
  • The solenoid and servo valve confine injector operation to open or closed.
  • Very finely tuned for some speed, operation is then sensitive to fuel properties.
Advancing the State of this Art
GPDT's advances are to the diesel engine what the invention of the telephone was to the telegraph.
  • In the early 2000s, faster injector opening and closing was known to help reduce emissions.
    • Therefore, a faster actuator was needed for the servo valve.
  • United States Patent 7,255,290 theorized how to get higher speed from a new actuator technology.
  • After 7,255,290 issued, GPDT was incorporated in 2008 to test the speed theory.
  • This actuator eliminates the need for a servo valve.
Key Features UUT2
GPDT offers previously unavailable continuous and durable control over each entire injection event.
  • GPDT's 2018 prototype injector design has no servovalve.
  • Needle lift is proportional to electrical current flowing through the actuator. Because current can be held steady for any length of time anywhere in its range, the needle can be stopped for any length of time at any intermediate lift anywhere in its range, thus varying at will the rate at which fuel is injected.
  • Needle speed is proportional to the rate at which current increases or decreases.
Tests prove these control features.