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SCIEEF™ Test Rig


Small Compression Ignition Engine Emissions/Fuel Test Rig
for Research with Test Diesel Fuel Blend Components, Test Fuel Additives and Alternative Diesel Test Fuels
  • Precise measurement of diesel engine operability, performance and combustion characteristics
  • Precise measurement of diesel exhaust emissions
  • Small volume requirement of test fuel (~2000 ml)

SCIEEF™ Test Rig

  • SCIEEF™ test rig was initially developed by AET with its R&D partners1 to reduce the volume of fuel required for the screening of specialty or custom test fuels in terms of exhaust gas measurements
  • provides screening data for effects of additives, fuel blends and alternative fuels on engine operability, performance, combustion and injection characteristics and exhaust emissions
  • combustion pressure instrumentation allows the combustion behaviour oftest fuels to be quickly and easily compared to the behaviour of reference fuels
  • fuel injection system and engine can be easily disassembled and inspected to determine the effects of test fuels onfuel injection system and combustion chamber components
  • requires only 2 to 3 litres of fuel for 2 repeat eight mode test cycle
  • a complete test cycle (4 eight mode test cycles, 2 with a certified reference fuel and two with a test fuel) can be completed in a single working day
  • diesel engine optimized for reduced NOx and particulate emissions
  • small, single cylinder, four stroke direct injection diesel engine/dynamometer test rig (capability to add simulated turbocharging and presently has ability for aftercooling, intercooling and exhaust gas re-circulation)



  • employs a steady-state eight mode (or higher) ISO exhaust emissions test cycle2, can use other test cycles to simulate different engines or engine operating conditions
  • representative of larger multi-cylinder four stroke diesel engines
  • database composed of SCIEEF™ and multi-cylinder heavy duty diesel engine exhaust emissions data being developed for North American and European diesel fuels compared to US/EPA certified reference fuels
  1. Air Products and Chemicals Inc., Natural Resources Canada, US Department of Energy, Shell Canada Ltd., Société Général de Financement du Québec and Lambiotte et Cie SA participated in a co-operative research study performed by AET. The SCIEEF™ test rig was initially developed for use in this study as a screening tool to investigate the characteristics of small volumes of test fuel blends in terms of engine performance, combustion, and exhaust emissions.
  2. ISO 8178-4/8.3.1.1 "Reciprocating internal combustion engines - Exhaust emission measurement - Test cycles for different engine applications"

System and Sub-system Description


The single cylinder diesel research engine is instrumented to provide continuous monitoring of most major operating conditions. Features of the engine instrumentation and control system include:

  • measurement of instantaneous combustion pressure in the cylinder using a high accuracy fibre-optical combustion pressure sensor
  • measurement of instantaneous fuel injection pressure using a high accuracy piezoresistive fuel injection pressure sensor
  • measurement of instantaneous injector nozzle needle lift using a Hall-effect proximity sensor mounted within the injector nozzle body
  • engine torque and angular speed measurement using an electronic load cell and an optical crankshaft angle encoder
  • accurate determination of instantaneous crankshaft angle (0.2 to 0.8° resolution), allows accurate timing of fuel injection and combustion events
  • direct measurement of fuel flow rate by drawing fuel from a reservoir on a high resolution weigh scale under computer control
  • monitoring and archiving of operating temperatures of various engine and fuel system components
  • user friendly data acquisition system operated by a familiar point-and-click Windows® graphical user interface.



Below is an image gallery of additional SCIEEF images that demonstrate the various components of the system.