Abstract
In this paper, the impact of dwell angle and two-stage fueling technique on engine efficiency and tailpipe emissions in a 3.5 kW powered four-stroke diesel engine fueled with waste cooking oil (WCO) biodiesel blends were investigated. An experiment with single-cylinder high-pressure CRDi equipped diesel engine was executed at two different dwell angles (5° CA and 10° CA) with varying pilot fueling quantities of 10% and 20% at nozzle fueling pressure of 600 bar. The outcomes revealed that the combined effect of dwell angle and two-stage fueling techniques had enhanced the BTE by 8.13% for B20P20 pilot fueling timing (PFT) of 28° bTDC, whereas BSFC lowers for B20P20 blend at pilot fueling timing of 33° bTDC. Comparing B20P20 PFT at 28° bTDC to PFT at 33° bTDC, CO, HC and smoke emissions drop by 72.72%, 37.04%, and 93.75%, respectively. The nitrogen oxide reduction is unaffected by two-stage fueling strategy among all the test sample fuels and significantly higher for the biodiesel blends than mineral diesel.
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