TY - JOUR
TI - Exhaust emissions of methanol and ethanol-unleaded gasoline blends in a spark-ignition engine
AU - Altun Şehmus
AU - Öztop Hakan F
AU - Öner Cengiz
AU - Varol Yasin
JN - Thermal Science
PY - 2013
VL - 17
IS - 1
SP - 291
EP - 297
PT - Article
AB - In this study, the effect of unleaded gasoline and unleaded gasoline blended  with 5% and 10% of ethanol or methanol on the performance and exhaust  emissions of a spark-ignition engine were experimentally investigated. The  engine tests were performed by varying the engine speed between 1000 and 4000  rpm with 500 rpm period at threefourth throttle opening position. The results  showed that brakespecific fuel consumption increased while brake thermal  efficiency, emissions of carbon monoxide (CO) and hydrocarbon (HCs) decreased  with methanol-unleaded gasoline and ethanol-unleaded gasoline blends. It was  found that a 10% blend of ethanol or methanol with unleaded gasoline works  well in the existing design of engine and parameters at which engines are  operating.