TY - JOUR
TI - Effects of ethanol added fuel on exhaust emissions and combustion in a premixed charge compression ignition diesel engine
AU - Kim Yungjin
AU - Tomita Eiji
AU - Lee Kihyung
JN - Thermal Science
PY - 2015
VL - 19
IS - 6
SP - 1887
EP - 1896
PT - Article
AB - The use of diesel engines for vehicle has been increasing recently due to its  higher thermal efficiency and lower CO2 emission level. However, in the case  of diesel engine, NOx increases in a high temperature combustion region and  particulate matter is generated in a fuel rich region. Therefore, the  technique of PCCI (premixed charge compression ignition) is often studied to  get the peak combustion temperature down and to make a better air-fuel  mixing. However it also has got a limited operating range and lower engine  power produced by the wall wetting and the difficulty of the ignition timing  control. In this research, the effect of injection strategies on the  injected fuel behavior, combustion and emission characteristics in a PCCI  engine were investigated to find out the optimal conditions for fuel  injection, and then ethanol blended diesel fuel was used to control the  ignition timing. As a result, the combustion pressures and ROHR (rate of  heat release) of the blended fuel became lower, however, IMEP showed fewer  differences. Especially in the case of triple injection, smoke could be  reduced a little and NOx emission decreased a lot by using the ethanol  blended fuel simultaneously without much decreasing of IMEP compared to the  result of 100% diesel fuel.