Analysis of Combustion and Cycle-to-Cycle Variations of an Ethanol (E100)-Fueled Spark-Ignition Engine

Ethanol, produced from biomass, is a renewable fuel that can be an attractive alternative to gasoline for the increasing concerns of energy security and environment. In present work, combustion characteristics ethanol (E100) fueled spark-ignition engine are compared with base fuel, consecutively evaluated cycle-to-cycle variations (CCV) parameters using statistical analysis. These investigations were performed on 250cc air-cooled four-stroke single-cylinder port-fuel injection fuels. The was operated at 3500 rpm 4000 speed while maintaining same loads gasoline. It found results peak in-cylinder pressure (Ppeak) lower than given load. Ppeak decreased 27.5 25.5 bar when used in 9.8:1 compression ratio, rpm, 5 Nm Moreover, mass fraction burned air-fuel mixture faster as CCV Ppeak, location speed, indicated mean effective (IMEP) evaluated. result showed its lowered related A decrement coefficient variation (COV) 11.6% 8.3% 12.6% 11.7%, respectively, observed utilized instead This resulted decrease COV IMEP by 2.8% 0.25%, Nm. study indicate stability spark ignition better fuel.