Motori a Combustione Interna e Biocombustibili

The available ICEG test facilities are:

  • two CFR (Cooperative Fuel Research Engine) single cylinder engines (a spark ignition and a Diesel one);
  • one steady-state eddy current dynamometer test bench, which allows to install two different engines.

For details on CFR engines, please follow the link to investigations on renewable fuels.
The main available instruments used for the experimental activities are:

  • a Schenck W260 eddy current dynamometer with a rated power of 260 kW and a maximum rotational speed of 7500 rpm;
  • an automatic data acquisition and processing system to evaluate the most important engine parameters. The relevant procedures have been developed at ICEG in LabVIEW® environment and in Fortran, allowing to manage the acquisition system in order to measure about 60 engine operating quantities, to process them and calculate all the main parameters with a graphical presentation of the results;
  • a dynamic fuel balance AVL 733S, for the direct gravimetric measurement of fuel consumption;
  • an analysis system for measurement of pollutant concentrations at the engine exhaust, including:
  • non-dispersive infrared instruments (NDIR) for the determination of CO2 concentrations;
  • a flame ionisation device (FID) for HC;
  • a chemiluminescent analyser (CLA) for NOx;
  • a variable sampling smoke meter AVL 415 for smoke determination.

Moreover, dedicated instrumentation allows to evaluate instantaneous pressure levels inside the cylinder and in the intake and exhaust circuit, through data acquisition and post-processing procedures carried out through codes developed by ICEG, performing all the requested steps, from data filtering to heat release calculation.
Experimental investigations on engine management are based on the use of open electronic control units, fitted with an EPROM emulator connected through a proper interface to a dedicated PC, in which a specific software allows to edit and change in real time all control variables of different engine systems (i.e. fuel injection, turbocharging, exhaust gas recirculation systems, etc) in order to optimise selected objectives.