Case Study: Injector Pulsation Test
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Overview:
A global fuel-injection systems manufacturer sought a turn-key injector pulsation test equipment solution that could be used in the R&D field worldwide for the development of the injectors. The challenge was to provide the best technical solution to a competitive price and to be able to support this global program worldwide. Assembly & Test Worldwide (ATW) successfully met this challenge by designing and building the most robust, reliable, and flexible injector pulsation test system as possible.
Values & Benefits:
  • Less components in the test circuit
  • Less mass in motion under the high frequency
  • Easier maintenance
  • Automatic bleeding
  • Fresh and clean test fluid for each pulse cycle
  • Constant test fluid temperature
 
Solution:
  • The “back pressure” - principle is used to generate the pressure pulses.
  • A high pressure piston pump and a servo valve at the outlet of the common rail are used to generate and control the pressure level of the rise & dump rate.
  • Sinusoidal pressure pulses are programmable in order to stress the injectors at levels up to 1000bar and 15Hz.
Highlights:
  • Easy adaptation of up to 12 injectors.
  • Integrated test fluid conditioning and refinery. -ATW-Standard test software and data acquisition system based on NI - LabView.
  • Makrolon guarding with safety switches on all doors.
  • Flow trough concept.
  • Pressure Range up to 1000 bar.
  • Frequency up to 15 Hz.
  • Volume displacement up to XX cm³ under maximum frequency.
  • Medium: Hydraulic Fluid HLP32 (other medium on request).
  • Fluid Temperature 20°C up to 80°C (other temperature on request).
  • Test Piece Temperature - Environmental temperature (other temperature on request).
  • Pulse form programmable Sinus (Triangle, Trapezium on request).
  • Fine Leak: Pressure Decay.
  • Rough Leak: Catching hopper with sensor.
  • Noise Level < 75 dB in.