Maximizing the benefits of high octane fuels in spark-ignition engines

Higher octane gasoline will be an important factor in enabling future spark-ignition engines to meet increasingly stringent fuel economy and CO2 emissions requirements. The most effective method to raise the octane ‘floor’ of regular grade gasoline is through the use high octane blend components, such as methanol and ethanol. However, this is often limited by the negative effects associated with energy density, phase separation and cold engine...