Compressed natural gas direct injection (DI-CNG) systems in spark ignition (SI) internal combustion engines have shown that it can give several benefits compared to CNG port fuel systems. However, the DI-CNG injector nozzle head design and jet formation may greatly influence engine exhaust emissions performance. Present experimental study investigated of 7 different designs spray-guided injecto...

The effects of spark timing and exhaust valve timing change on exhaust gas temperature during cold start of an SI engine are studied through engine bench tests. It is observed that the exhaust gas temperature increases when the spark timing and valve timing are retarded individually or simultaneously, due to late combustion or slow flame speed. However, using COVimep it is also investigated tha...

operating an engine with homogeneous charge compression ignition (hcci) technique is a promising technique to lower nox and pm emissions of engines while achieving high efficiency and lower fuel consumption. nevertheless, applications for hcci are still limited due to the absence of a definite means to control ignition timing and narrow operating region. a single cylinder diesel engine with com...

Hydrogen is a promising future fuel to enable the transition of transportation sector toward carbon neutrality. The direct utilization H2 in internal combustion engines (ICEs) faces three major challenges: high NOx emissions, severe pressure rise rates, and pre-ignition at mid loads. In this study, potential truck-size engine operated spark ignition (SI) pre-chamber (PC) mode was investigated. ...

Sustainability issues are becoming increasingly prominent in applications requiring the use of heavy-duty engines. Therefore, it is important to cut emissions and costs such engines reduce carbon footprint keep operating expenses under control. Even if for some a battery electric equipment introduced, diesel-equipped machinery still popular thanks longer range. In this field, open pit mines goo...

A single-cylinder marine diesel engine was modified to be operated in reactivity controlled compression ignition (RCCI) combustion mode. The fueling system upgraded a common rail fuel injection system. Natural gas (NG) used as port injection, and diesel/sunflower methyl ester biodiesel mixture for direct injection. fraction of the changed from 0% (B0; 100% diesel) 5% (B5) 20% (B20) while keepin...