562015-03-24 , 法政大学大学院理工学・工学研究科
Internal combustion engine has been required high efficiency and low pollution from increase of energy demand and environmental problem. Therefore, it has been attracted attention to use diesel engine that has superior environmental performance compared with gasoline engine and low environmental loading fuel from biomass as an alternative fuel. Diesel engine has low fuel consumption and CO2 emission compared with gasoline engine, therefore, sales of new cars over 50% are diesel in Europe. On the other hand, there is a strict regulation against emission such as NOx and PM in many countries, therefore, further performance improvement is needed. As a fuel from biomass, bioethanol made from plant and Bio Diesel Fuel (BDF) made from oil and fat has been using. Therefore, effects for combustion characteristics of diesel engine have been investigated by using alcohol-coconut-light oil blend fuels.The main results are as follows;1) NOx emission is reduced by using alcohol-light oil and alcohol-coconut-light oil blend fuels at any load conditions. 2) HC and CO emission are reduced by using multicomponent alcohol fuel and alcohol-coconut-light oil blend fuels at low load condition. 3) CO2 emission and Net Thermal Efficiency are same level as light oil by using alcohol-light oil and alcohol-coconut-light oil blend fuels.