Triplex Metering Fuel Pump

The triplex metering fuel pump represents a substantial step forward for EFI technology in small engines. The triplex provides high-pressure regulated fuel delivery of particular application to heavy fuel and gasoline engines. Its unique phased three-piston design, combined with an integrated control system, gives very precise regulation of fuel delivery across a wide range of pressures.

The triplex is an enabling technology for heavy fuel engines, providing high pressure fuel that is able to be finely atomized using Currawong’s unique atomization technology.

A special feature of the pump is built-in precision measuring of fuel flow without having to rely on separate meters and other non-design-intent hardware. This feature can be used throughout system development, and is particularly useful when used with a dynamometer as Brake Specific Fuel Consumption can be easily calculated in real time.

Triplex Pump – High Flow Version
CE822 Triplex Pump – High Pressure Version


Features of the triplex pump include:

  • Self priming ability
  • Integrated electronics that provide precise fuel pressure and flow metering
  • Three phased pumping cylinders to provide a smooth fuel delivery without the use of a fuel accumulator or mechanical regulator
  • Fully compatible with the Currawong ECU and with other ECUs
  • Very low power consumption
  • High pressure fuel delivery
  • Entirely compatible with Cloud Cap Technology’s avionics as well as with other avionics systems
  • Able to be deployed as a flow metering pump with < 1% error

The system can be used on its own, or can be used in conjunction with the Currawong ECU and other parts of integrated EFI systems.

An example of a typical configuration (that may be altered by changing the motor/gearhead configuration) is shown. The following figures are for a motor fitted with a 28:1 gearhead:

  • Voltage: 15V
  • Current: 100mA
  • Pressure: 8 bar
  • Pressure Regulation: within 2%
  • Flow regulation: within 1%
  • Flow Rate: 36 g/min *

* Flow rates up to 400 g/min (50 Hp) are in development

Data Sheet: