In-cylinder pressure profiling for CNG/ethanol enriched biodiesel combustion

Abstract

The current study takes a comparative approach to analyze the In-Cylinder pressure distributions and their effect on the engine combustion stability for a specific diesel engine when fueled with Mahua biodiesel in split injection mode with low reactive CNG/ethanol through port fuel injection. Variations in injection time, main-pilot energy sharing, and reactivity of the fuel mixture are included in this investigation. The engine’s operational and combustion stability during ethanol/CNG enriched Mahua biodiesel operation has been demonstrated by the coefficient of variance of indicated mean effective pressure and maximum rate of pressure rise, respectively. The minimum value of the stability index of maximum pressure rise rate for CNG-biodiesel & ethanol-biodiesel combustion illustrated a 49.23% & 88.07% reduction compared to baseline diesel operation. The minimum value of COVIMEP for the respective fuel strategies registered 83.49% & 40.27% lower measures than the corresponding baseline diesel operation. This inquiry also examines the variance in emission and performance of the test engine with stability indicators. 13.04% & 34.92% higher thermal efficiency have been reported for ethanol-biodiesel operation under the most stable combustion and operating conditions. Significantly lower particulate matter and carbon monoxide footprints have been reported under CNG-biodiesel operation with higher stability conditions.