Abstract Numerical simulations were carried out to study the influence of ozone on Ignition Delay Time (IDT) iso-octane/air mixtures under typical operating conditions HCCI engines. 0-D and 2-D CFD compute IDT characterize compression, combustion, expansion in an engine, respectively. A kinetic model was developed by merging a mechanism for iso-octane, sub-mechanism nitrogen oxides, ozone. The ...

Ignition and propagation of a reaction front in a counterflow system of an iso-octane/air stream mixing with an exhaust gas stream is computationally investigated to understand the fundamental characteristics of homogeneous charge compression ignition (HCCI) auto-ignition. Various mixing rates are imposed on the system and the effects of dissipation rates on auto-ignition are studied. Ignition ...

A reduced mechanism of diesel fuel was developed on the basis Wang’s mechanism. First, for removing unimportant reactions, an importance index defined computational singular perturbation (CSP). Choosing 0.0065, 140 reactions were removed, and obtained a smaller 403 elementary reactions. Second, 32 global quasi-steady-state (QSS) species found with threshold value 0.005. Finally, smallest contai...

To meet energy demand as well emission regulations of today’s world moved the researchers towards use alternative fuels such alcohols, biofuels in CI engine. Present work is to examine performance and characteristics fumigated butanol on a duel fuel mode HCCI Experiments were performed for n-butanol fumigation (nBF) at constant speed 1500rpm with fixed mass flow rate under varying engine loads ...

Dimethyl ether (DME)/C1-C4 alkane mixtures are ideal fuel for homogeneous charge compression ignition (HCCI) engines. The comparison of delay and multi-stage DME/C1-C4 can provide theoretical guidance expanding the load range controlling time DME HCCI However, interaction mechanism between C1-C4 under engine relevant high-pressure low-temperature conditions remains to be revealed, especially co...

The European Union (EU) has recently adopted new directives to reduce the level of pollutant emissions from non-road mobile machinery engines. main scope project RIVER for which this study is relating develop possible solutions achieve nitrogen-free combustion and zero-carbon in diesel aims apply oxy-fuel with Carbon Capture Storage (CCS) technology eliminate NOx capture store carbon emissions....

An automatic adjustment method of the model-based controller an HCCI engine was designed in this study. As modeling errors are inevitable, feedback control is usually introduced to reduce effect errors. However, especially under transient conditions, performance may deteriorate, because a with information previous cycle. The thought be improved by taking into consideration. Therefore, algorithm...