Search results for "Diesel cycle"

showing 4 items of 4 documents

A mathematical model for the prediction of the injected mass diagram of a S.I. engine gas injector

2013

A mathematical model of gaseous fuel solenoid injector for spark ignition engine has been realized and validated through experimental data. The gas injector was studied with particular reference to the complex needle motion during the opening and closing phases, which strongly affects the amount of fuel injected. As is known, in fact, when the injector nozzle is widely open, the mass flow depends only on the fluid pressure and temperature upstream the injector: this allows one to control the injected fuel mass acting on the “injection time” (the period during which the injector solenoid is energized). This makes the correlation between the injected fuel mass and the injection time linear, e…

Injector modelEngineeringbusiness.industryMechanical EngineeringNuclear engineeringInjectorDiesel cycleFuel injectionSettore ING-IND/13 - Meccanica Applicata Alle MacchineAutomotive engineeringlaw.inventionFuel mass fractionSettore ING-IND/08 - Macchine A FluidoInternal combustion engineMechanics of MaterialsEngine efficiencylawSpark-ignition engineCNGGas injectorSpark ignition enginePhysics::Chemical PhysicsbusinessPetrol engineJournal of Mechanical Science and Technology
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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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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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Simple method of estimating consumption of internal combustion engine for hybrid application

2012

This article presents two simple methods to evaluate the fuel consumption of internal combustion engines. Furthermore, it points out the link between piston volume, engine size and fuel consumption as it gives the possibility to visualize the chosen working points inside an internal combustion engine operation points map. This leads to the fact that this approach is a very helpful tool for the design of hybrid systems including internal combustion engines. The two presented methods, one very simple, one more elaborated, are interesting as first approach of internal combustion engine sizing and to evaluate the consumption of internal combustion engine. The results for six pure internal combu…

EngineeringInternal combustion enginebusiness.industryHomogeneous charge compression ignitionCompression ratioHydrogen internal combustion engine vehicleExternal combustion engineInternal combustion engine coolingDiesel cycleLongitudinal enginebusinessAutomotive engineering2012 IEEE Transportation Electrification Conference and Expo (ITEC)
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