Search results for "HCCI"

showing 4 items of 4 documents

Problematiche energetiche e sviluppi connessi alla combustione double fuel

2014

Gas naturale GPL motore numero di ottano sovralimentazione HCCISettore ING-IND/10 - Fisica Tecnica Industriale
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NOX reduction and efficiency improvements by means of the Double Fuel HCCI combustion of natural gas–gasoline mixtures

2016

Abstract Homogeneous Charge Compression Ignition (HCCI) and Double Fuel (DF) combustion represent two innovative processes sharing a strong potential for pollutant emissions and fuel consumption reduction. HCCI regards the auto-ignition of a homogeneous premixed charge of air and fuel, featuring very low NOX emissions and good efficiency. Double Fuel (DF) instead indicates the simultaneous combustion of gasoline and natural gas (or gasoline and LPG), premixed with air by the port injection of both fuels within same engine cycle. Since fuel mixtures enhances the HCCI performances widening the range of possible operating conditions, the authors tested the HCCI combustion process using natural…

Materials science020209 energyHomogeneous charge compression ignitionNuclear engineeringNatural gaEnergy Engineering and Power Technology02 engineering and technologyDiesel cycleInternal combustion engineIndustrial and Manufacturing EngineeringAutomotive engineeringSettore ING-IND/08 - Macchine A Fluido020303 mechanical engineering & transports0203 mechanical engineeringInternal combustion engineEngine efficiency0202 electrical engineering electronic engineering information engineeringFuel efficiencyOctane ratingHCCIHydrogen fuel enhancementGasolineSpark ignitionGasolineApplied Thermal Engineering
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Preliminary Experimental Study on Double Fuel HCCI Combustion

2015

AbstractThis paper regards an experimental study on a particular internal combustion engine process which combines Double Fuel combustion with Homogeneous Charge Compression Ignition (HCCI) using mixtures of natural gas (NG) and gasoline. The tests performed on a CFR engine demonstrate that HCCI combustion can be achieved using NG-gasoline mixtures without knocking occurrence for low to medium engine load varying the proportion between the two fuels. The main advantage of this new combustion process relies on the noticeable higher engine efficiency obtained with respect to conventional spark ignition operation, and on the strong reduction of NOX emissions.

gasolinesimultaneous combustionChemistryHomogeneous charge compression ignitionNatural gaDiesel cycleCombustionNitric OxideAutomotive engineeringlaw.inventionIgnition systemnatural gasSettore ING-IND/08 - Macchine A FluidoInternal combustion engineEnergy(all)lawEngine efficiencyefficiencyCompression ratioHCCIDouble FuelEngine knockingEnergy Procedia
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La combustione HCCI mediante miscele di gas naturale e benzina: una prima esperienza sperimentale

2016

Si presentano in questo articolo i risultati di una sperimentazione volta a valutare la possibilità di effettuare una combustione HCCI (Homogeneous Charge Compression Ignition) stabile mediante l’impiego di miscele di gas naturale (GN) e benzina. La combustione HCCI ha ottime prerogative di basso impatto ambientale, ma la sua realizzazione pone qualche problema di stabilità al variare delle condizioni di carico richieste al motore: lo studio condotto mostra come l’impiego di miscele di GN e benzina, la cui composizione permette di variarne la resistenza all’autoaccensione, consente di ampliare il campo di funzionamento stabile della combustione HCCI. In the last decade the HCCI combustion h…

natural gacombustibili alternativiSettore ING-IND/08 - Macchine A Fluidointernal combustion enginemotori a combustione internaalternative fuelHCCIgas naturale
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