Study on the Combustion Characteristics of the Engine Fueled with DME-Diesel Blends

Abstract:

To further study the performance of the engine fueled with DME-diesel blends, the indicator diagrams of a two-cylinder four-stroke engine are recorded at 1700r/min and 2300r/min under different load, the heat release rate and the rate of pressure rise are calculated. The results show that: when fueled the engine with D20 blend (Mass ratio of DME and diesel oil is 2:10) and optimizing the fuel supply advance angle, the maximum cylinder pressure decreases by 10% averagely and its corresponding crank angle delays 2°CA, the maximum rate of pressure rise is relatively lowers about 20%, the beginning of heat release delays，but combustion duration do not extend, and the centroid of heat release curves is closer to TDC (Top Dead Center), maximum combustion temperature drops 70-90K. These results indicate that the mechanical efficiency will be improved and, NO_x emissions and mechanical noise will be reduced when an engine fueled with DME-diesel blends.

• Periodical: Advanced Materials Research (Volumes 953-954)
• Pages: 1381-1385
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.953-954.1381
• Online since: June 2014
• Authors: Wei Li*, Yun Peng Li, Fan Bin Li
• Keywords: Blend, Characteristic, Combustion, Diesel, DME

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