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Path: Home » Indice Pubblicazioni » Convegni ATI - Accesso riservato soci CTI » CA - 65 - Cagliari 2010 » Potentiality assessment of cng fuelli...
Autore: M. Baratta, A. E. Catania, S. d’Ambrosio, D. Misul, A. Mittica, E. Spessa
Collana: CA - 65 - Cagliari 2010
Note:
An experimental investigation and heat release analysis was performed on two different CNG engines: a 2 litre 16V VIS bifuel engine running on CNG and a prototype 1.2 litre 4 cylinder turbocharged. The experimental tests were carried out in order to assess the engine performance improvement attainable through combustion optimisation and turbocharging as well as to define the best control strategies for this latter. The investigation included ample variations of engine RAFR. At each test point, in-cylinder pressure, fuel consumption and ‘engine-out’ pollutant emissions, including methane unburned hydrocarbons concentration, were measured. The signals correlated to the engine operation were acquired by means of a National Instruments PXI-DAQ system and a purposely home developed software. The acquired data were then processed through a combustion diagnostic tool resulting from the integration of an original multizone heat-release model with a CAD procedure for burned-gas front geometry simulation as well as for burning velocity and flame radius computing.
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