Effect of ignition timing on performance of a hydrogen-enriched n-butanol rotary engine at lean condition

Numerical investigation of the effect of advance ignition timing on combustion process in direct injection rotary engine fueled with biodiesel

“…This indicates that, further advancing IT results in contributing to earlier heat release commencement and helps to attain a higher maximum P max values that generally improves the engine performance. The results trend are same as in references , which proves that generically whether liquid, gaseous or blends of liquid, and gaseous fuels are used, when IT is advanced properly there is bound to be improvement in engine performance. Another reason could be the high concentration of biodiesel fuel at advanced IT during spark on which makes its distribution more conducive to successful ignition as well as subsequent combustion.…”

“…The reason been that at IT, fuel concentration near spark plugs differ, and the more advanced the IT the higher their fuel concentrations as previously discussed in Figure thus their distribution is more conducive to successful ignition. This also illustrates that advancing IT can accelerate the fuel burning rate and increase the combustion temperature in‐cylinder, which is same in references . Even though this confirms that reasonably advancing IT leads to acceleration of fuel burning rate when there is a case of over advancement, with case 5, there is bound to be retardation in the combustion reaction rate, which invariably leads to reduction in engine working pressure as discussed earlier and subsequently leads to a smaller flame distribution pattern, relatively lesser amount of fuel burned, and a retarded flame front.…”

“…It can be seen clearly from Figure that the best ignition advance time for lower NO emission is case 4. It can be seen from Figure that CO emissions reduce significantly compared to the CO 2 emissions but the different advance IT of CO changes a little, which is the same as in references . This is because the equivalence ratio of 0.67 was not changed meaning enough oxygen been present to react with most of the carbon.…”

“…It affects combustion process significantly, thus determining fuel economy, output torque, and emissions performance . Research has shown that IT is an important and key component, which plays complementary role when it comes to combustion processes in the cylinder . Based on the advantages of biodiesel and the significant influence of IT on engine combustion performance, it is of prime importance to study the advance IT effect of biodiesel fuel when used in the operation of DI DRE.…”

Bir Wankel Motorunda Farklı Ateşleme Avanslarının Performans ve Emisyonlar Üzerinde Etkisi

“…The propagation process of the flame was shortened. Also, HC and NOx emissions increased (Su et al, 2018). Ji et al in the conducted numerical study, it was observed that the leading spark plug was kept constant and the trailing spark plug slightly affected the mean flow rate (Ji et al, 2019).…”