A six-zone simulation model for HCCI engines with a non-segregated solver of zone state

Performance Evaluation of Homogeneous Charge Compression Ignition Combustion Engine – A Review

“…HCCI combustion works better at lower pressure ratios (12)(13)(14)(15)(16)(17)(18), but a higher compression ratio results in better emission reduction of UHC, CO, and soot. Results with higher compression ratio were not considered.…”

“…During early injection in normal HCCI ignition, fuel is infused during the start of the pressure stroke, which permits a mixture duration that is adequate for the development of a homogeneous mixture [22,23]. Reducing the compression ratio (8)(9)(10)(11)(12)(13)(14)(15) of the engine is a better trade-off for trouble-free HCCI ignition, considering that the combustion efficiency for different pressure ratios when using primary fuel with octane number (ON) ranging from 0 to 100, HCCI efficiency diminishes linearly with increasing compression ratio.…”

“…Based on the glow plug information it has longer combustion duration at higher intake temperature, so the presence of a glow plug contributes to longer combustion duration and affects the temperature distribution [2,11,13,14]. The prior combustion phase, either with higher glow plug voltage or higher intake temperature, has more a wider temperature distribution with a lower maximum distribution point [2,13,15,16], increasing the upper limit of the distribution. When the wall area is unaltered, the maximum distribution is lowered and the range is also larger when utilizing a glow plug.…”

“…As there is no flame lead in HCCI, less fuel should be stuck in the crevices. When the cylinder pressure increases, a larger portion of the gas is forced into the crevices [13,93], which is officially consumed and thus not added to the HC outflow. With an increase in intake pressure, and consequently in IMEP, specifically the HC emissions are reduced for ethanol and iso-octane.…”

A new predictive multi-zone model for HCCI engine combustion

“…Initial conditions were estimated on the basis of 1-D simulations in order to provide the correct boundary conditions of temperature, pressure, internal EGR and chemical composition. Also Kozarac et al [29] developed a six-zone model where consistent initial and boundary conditions are provided by a 1-D cycle simulation software in order to evaluate.…”