Technical Paper
Study on Combustion and Emission Characteristics of Diesel Engines Fueled with Ethanol/Diesel Blended Fuel
2009-11-02
2009-01-2675
The effects of different ethanol-diesel blended fuels on the performance and emissions of a single cylinder engine have been experimentally evaluated and compared in this study. Several diesel blends containing up to 20% ethanol have been operated on the IC engine and compared with the pure diesel fuel. The regulated and unregulated emissions have been measured, the regulated emissions were HC, CO, NOx and CO2, the unregulated emissions were formaldehyde(CH20), formic acid(HCOOH), acetaldehyde(CH3CHO) and ethanol(C2HsOH). Addition of ethanol in the fuel made an increase of ignition delay and burning phase lag, but had little effects on the largest pressure of cylinder. The emission tests indicated that NOx emissions declined with the increasing ethanol-containing, especially in high-speed and high-load conditions. For ethanol-containing fuels, HC emissions were appreciably increasing (up to 50%).CO emissions were extremely high under high load conditions.