Experimental Investigation of the Behavior of Modulated Kinetic Combustion Strategy in a Diesel Engine at Different Engine Loads

Güçlü M., Gezer O., Büyük C., Özener O., Özkan M.


  • Publication Type: Conference Paper / Full Text
  • City: Girne
  • Country: Cyprus (Kktc)
  • Page Numbers: pp.827-836
  • Yıldız Technical University Affiliated: Yes


Nowadays, the harmful atmospheric effect of exhaust gases pollutants have reached critical level that creates serious problems. This raises the issue of limitations or restrictions the use of internal combustion engines. Diesel engines emit high amounts of NOx and soot emissions, and continuous use of diesel engines is only possible if these two emissions are taken under control. Modulated kinetic (MK) combustion strategy aims to control NOx and soot emissions in diesel engines by retarding combustion than conventional timing, with compromising engines effective power. In this study, the change trends of these two emissions were examined with MK strategy. In this study, the start of injection timing was changed with certain steps in certain range and injected fuel quantity (IFQ) were manipulated. Indicated engine torque, effective engine torque, in-cylinder peak pressure and heat release rate values were investigated under constant engine speed and rail pressure condition. In addition, carbon monoxide, unburned hydrocarbon, nitrogen oxide and soot emissions were evaluated. Also, specific emissions were included the study. According to the results from the study, when combustion was delayed, an increase were observed in carbon nonoxide and hydrocarbon emissions, but significant decrease was observed in nitrogen oxide emissions. In the soot emissions, a decrease was observed in the first zones where the MK strategy dominates the combustion, and then, as a result of the late combustion, the soot emissions started to increase again due to the negative impact of the poor atomization regime. With the increase in the IFQ, the changing ratio of different start of injection timing became more complex, the reduction in NOx emission at high IFQ values also decreased to a narrower band, and a same trend wasn’t observed for soot emission.