Benzin-metanol (M5-M10) karışımlarının SI motorundaki performans üzerine deneysel bir araştırması

Abstract

Methanol is one of the promising alternative fuels for spark-ignition engines. It has a high octane number, increasing the octane number of gasoline that influence engine setting parameters. Ignition timing and injection duration are two engine setting parameters that influence the combustion process and emission of spark-ignition engine, which are therefore fascinating to be studied. The main objective of this work was to improve the performance of gasoline-methanol blends in a spark-ignition engine, which was carried out by optimization of engine operational parameters, which were ignition timing and injection duration. Performance parameters measured in this study were engine torque, power, and specific fuel consumption. An emission parameter such as carbon dioxide, carbon monoxide, and unburnt hydrocarbons was measured to evaluate the combustion process. Test results were analyzed by comparing performance and emission parameters of the engine on its standard and optimized settings. The result obtained that optimized ignition timing and injection duration sets products in an increase in engine torque and power, which are up to 12.99% and 1.72%, respectively, and 7.29% decrease in specific fuel consumption than engine with standard-setting using the same fuel blend. In addition, there was a decrease of carbon monoxide in exhaust emission, and unburnt hydrocarbon was slightly increased.