Combustion characteristics, performance and exhaust emissions of a diesel engine fueled with a waste cooking oil biodiesel mixture

摘要: Abstract In this study, a mixture of biodiesel fuels produced from two different kinds waste cooking oils was blended in 5% and 10% with No. 2 diesel fuel. The biodiesel/No. fuel blends were tested single-cylinder, direct injection, four-stroke, natural aspirated engine under four loads (BMEP 0.48–0.36–0.24–0.12 MPa) 2200 rpm speed. Despite the earlier start detailed combustion performance results showed that ignition delay addition decreased for all timings due to higher cetane number Meanwhile maximum heat release rate in-cylinder pressure rise slightly duration generally increased addition. However, significant changings not observed on pressures. addition, it indicated mean effective values varied depending timing center location. It found resulted increment break specific consumption (up 4%) reduction thermal efficiency 2.8%). additions also NO x emissions up 8.7% smoke total hydrocarbon loads. Although there no changes CO at low medium loads, some reductions full load. Also,