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《Journal of Nantong University(Natural Science Edition)》 2013-04
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Combustion Process and Emisssion Chracteristics of a Diesel Engine Fueled with Low-Oxygen Fuel Components

WU Qi-min;SUN Ping;MEI De-qing;LI Guo-cheng;Institute of Vehicle and Engine Emission,Jiangsu University;  
The addition of 10% biodiesel and 10%DMC,together with pure diesel form three test fuels which were called B10,D10 and diesel respectively,then effects of different oxygenated fuels with low proportional addition on combustion process,economic and emission characteristics were investigated in a single-cylinder engine.Results showed that under the rated operating condition,these two oxygenated fuels had little influnce on engine's maximum cylinder pressure and pressure rise rate peak,the maximum heat release rate of B10 was slightly decreased,while the addition of DMC,that of D10 was increased significantly.As compared to diesel,the ignition delay of B10 has shortened by about 1 ℃A which the ignition delay of D10 has extended by 2 ℃A;the effect of DMC on prolonging ignition delay was more obvious than the impact of biodiesel with same proportion on shortening ignition delay.The fuel comsupation of B10 was almost the same as that of diesel,while that of D10 was higher.The B10 could slightly reduce HC、CO and smoke emissions,except for a 7.9% higher NOx emissions at full load.Though the introduction of DMC in mixed fuels didn't promote the oxidation of HC and CO,it could simultaneously reduce NOx and smoke emissions.The NOx and smoke emissions of D10 have decrased by 13.1% and 17.7%.On the whole,the low proportional addition of biodiesel and DMC in diesel could partly achieve excellent subtitute of diesel without influencing the engine's performance.
【Fund】: 国家自然科学基金项目(50796051);; 江苏高校优势学科建设工程资助项目
【CateGory Index】: TK421.26
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