In this study, an innovative Low Temperature Combustion (LTC) system named Controlled Reactivity Compression Ignition (TCRCI) is presented, and a numerical optimization of the hardware operating parameters proposed. The studied combustion aims to reduce complexity Reaction engine (RCCI), replacing direct injection high reactivity fuel with heated low fuel. at actual state development its charac...

In this numerical study, the effects of premixed ratio, intake manifold pressure and air temperature on a four-cylinder, four-stroke, direct injection, low-compression-ratio gasoline engine, operated in reactivity-controlled compression ignition (RCCI) combustion mode at constant engine speed 1000 rpm, were investigated using Converge CFD software. The results analyses showed that maximum in-cy...

Driven by the Paris agreement and tightening IMO regulations, marine sector is focusing on lowering engine emissions moving to low-carbon fossil or renewable fuel such as methane. The dual-fuel concept allows usage of methane main energy-source in diesel engines. A small pilot injection acts an ignition source for premixed It was investigated how NOx formation, mainly taking place during combus...

Reactivity-controlled compression ignition (RCCI) is a promising energy conversion strategy to increase fuel efficiency and reduce nitrogen oxide (NOx) soot emissions through improved in-cylinder combustion process. Considering the significant amount of conducted research development on RCCI concept, majority work has been performed under steady-state conditions. However, most thermal propulsio...

There is a growing concern about the feasibility of new generation internal combustion engines in low-temperature and efficient way that can meet emission regulations while maintaining desirable power performance. This requires controllability flexibility over ignition reactivity within cylinder by handling two fuels with different chemical reaction intensity. In this research, controlled compr...

Large-eddy simulations with a transported probability density function model coupled finite-rate chemistry is applied to study the ignition process of an n-heptane spray in constant volume chamber premixed methanol-air atmosphere under conditions relevant reactivity controlled compression (RCCI) engines. Three reacting cases initial equivalence ratio (?m) ranging from 0 0.3 are investigated at ...

The use of natural gas (NG) in dual-fuel heavy-duty engines has the potential to reduce pollutant and greenhouse (GHG) emissions from transport sector when compared conventional diesel engines. However, NG composition methane slip are interest because both can adversely affect benefits as an alternative fuel, especially considering GHG emissions. Therefore, this study experimentally investigate...

Reactivity Controlled Compression Ignition (RCCI) is one of the most promising solutions among low temperature combustion concepts, in terms thermal efficiency and pollutant emissions. However, for values brake mean effective pressure higher than 10 bar, in-cylinder peak rise rates tend to be too high, limiting specific power any 4-Stroke (4S) engine. Such a limitation can canceled by moving 2-...