Bed Hybrid Applied Research On High Pressure Conjugate Electronic Control Diesel Engine

The energy is an important foundation for the survival and development of human society. With the rapid growth of internal combustion engine industry, energy supply system is facing an embarrassing situation. The world energy today is facing two major challenges, first, the challenge is how to safeguard the reliable and affordable energy supply, second, the challenge is how to turn energy supply system in the direction of a low carbon, efficient and environmentally friendly rapidly,. Biodiesel and ethanol is the biomass fuel to carry oxygen, with prominent environmental value, exploring and researching the biodiesel and ethanol in diesel engine on the application have the important meaning.The applications of biodiesel-ethanol-diesel blended fuel in diesel engine has a lot of research at home and abroad, compared with few research on the application under different atmospheric pressure for high pressure common rail diesel engine fueled with biodiesel-ethanol-diesel (BED) mixed fuels. The main research contents in this paper include the stability of different proportion components of the mixed fuel BED in different environmental temperature, fuel efficiency and dynamic under the different atmosphere and exhaust gas temperature and emission characteristics of soot.The results show that the stability interval of BED mixed fuel increases with the temperature and the proportion of the biodiesel increasing. The power of the external characteristics increases with the atmospheric pressure increasing. Torque and the equivalent fuel consumption of engine which uses BED mixed fuel reduce with the mixed biodiesel-ethanol blended fuel ratio increasing at the same pressure. The torque of engine of using B10E5decreases by1.7%-5.6%comparing with pure diesel under81kPa, and brake specific energy consumption drop4.2%-12.9%. The torque of engine of using B25E5decreases by6.7%-16.1%, and brake specific energy consumption drop3.1%-10.7%. The torque of engine of using B10E5decreases by2.9%-9.5%comparing with pure diesel under90kPa, and brake specific energy consumption drop2.8%-10.0%. The torque of engine of using B25E5decreases by7.7%-15.3%, and brake specific energy consumption drop2.0%-6.1%. B25E5decrease the torque of the7.7%-15.3%, brake specific energy consumption drop2.0%-6.1%. The torque of engine of using B10E5decreases by3.9%-12.2%comparing with pure diesel under100kPa, and brake specific energy consumption drop4.3%-9.1%. The torque of engine of using B25E5decreases by10.0%-14.1%, and brake specific energy consumption drop2.1%-4.9%. The exhaust gas temperature of using BED is lower than pure diesel. The emission of soot of using BED is lower than pure diesel. The emission of soot of using B10E5drop11.1%-55%, The emission of soot of using B25E5drop20.0%-75%.