The effect of ethanol blended diesel fuels on brake specific fuel consumption (BSFC), brake specific energy consumption (BSEC), smoke and NOx emissions has been investigated in a direct-injection diesel engine. Unregulated emissions including formaldehyde, acetaldehyde and unburned ethanol emissions are also analyzed. The results indicate that with the increase of ethanol in the blends, smoke reduces significantly, BSEC improves slightly and combustion duration decreases. However, the rate of heat release increases. Ignition delays. BSFC, NOx, acetaldehyde and unburned ethanol emissions increase. The maximum acetaldehyde emissions reached up to 100 ppm at low load.Compared to a gasoline engine using ethanol blended gasoline fuels, unburned ethanol emissions of the diesel engine are higher than those of the gasoline engine at the same ethanol concentrations and similar loads. Although engine-out acetaldehyde emissions from the gasoline engine are higher than those from the diesel engine under some operating conditions, acetaldehyde emissions after a Pt/Rh based three-way catalytic converter are lower than those of the diesel engine.To investigate the effect of ethanol blended diesel fuels on combustion processes and soot formation, the images of combustion processes were recorded using a high-speed CCD camera. The results reveal that the addition of ethanol to diesel fuels decreases combustion duration, flame luminosity and the regions of high flame luminosity, which indicates that soot formation in fuel-rich regions is suppressed by ethanol.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Study on Combustion and Emission Characteristics of Diesel Engines Using Ethanol Blended Diesel Fuels


    Additional title:

    Sae Technical Papers


    Contributors:
    He, Bang-Quan (author) / Chen, Hu (author) / Wang, Jian-Xin (author) / Yan, Xiao-Guang (author) / Tian, Xin (author)

    Conference:

    SAE 2003 World Congress & Exhibition ; 2003



    Publication date :

    2003-03-03




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Study on combustion and emission characteristics of diesel engines using ethanol blended diesel fuels

    He,B.H. / Wang,J.X. / Yan,X.G. et al. | Automotive engineering | 2003


    Study on combustion and emission characteristics of diesel engines fueled with ethanol/diesel blended fuel

    Yan,Y. / Yu-sheng,Z. / Si-ping,R. et al. | Automotive engineering | 2009


    Study on Combustion and Emission Characteristics of Diesel Engines Fueled with Ethanol/Diesel Blended Fuel

    Si-ping, Rao / Dong-dong, Wu / Yan, Yan et al. | SAE Technical Papers | 2009


    Ethanol Blended Fuels for Diesel Engine

    Mori,M. / Yanmar Diesel Engine,JP | Automotive engineering | 1980