DOE Co-Optima report identifies top ten bio-blendstocks for efficiency in boosted SI engines

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These top candidates, when blended with petroleum and used in a boosted spark ignition (BSI) engine, will offer environmental benefits and boost energy efficiency all while being available at a competitive price. The merit function determines potential improvements in engine efficiency, was used to evaluate the performance of candidate bio-blendstocks in blends up to 30%. Fusel alcohol mixture. George, Anthe, Monroe, Eric, Davis, Ryan W.,

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Team from GM, Ford, FCA reviews how to calculate engine efficiency benefits of high octane fuels

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The preflame reactions are a strong function of temperature, so evaporative cooling from the fuel can also play a significant role, which is particularly important for fuels containing alcohol. To achieve continued improvement in engine efficiency and CO 2 emissions, it is critical to quantify the roles of fuel octane rating and alcohol content. Alcohol and gasoline-alcohol blends also offer efficiency benefits independent of their octane value.

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