The effect of the injection pressure on single cylinder diesel engine fueled with propanol-diesel blend

In this study, the impact of fuel injection pressure on the exhaust emissions, combustion characteristics and engine performance of a single-cylinder diesel engine fueled with 15% propanol-85% diesel blend (Pro15) was investigated. The engine was run at three fuel injection pressures (190, 210, and 230 bar) under two engine loads (brake mean effective pressure (BMEP) of 2 bar and 4 bar) at two engine speeds (1800 rpm and 2400 rpm). The results confirmed that the increased pressure of injection caused to decrease the advance of injection. The increase in the ignition delay at high injection pressure for Pro15 was obtained less than those of low and original injection pressures. The combustion duration of Pro15 was shorter compared to petroleum-based diesel fuel. Increasing the injection pressure reduced the combustion duration slightly. The lowest brake specific fuel consumption (BSFC) was found at low injection pressure for both engine loads at 2400 rpm. Also, the addition of propanol to petroleum-based diesel fuel generally resulted in a decrease in smoke opacity and NOx emissions.