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

Green Car Congress

A team of engineers from GM Powertrain, Ford and FCA have published a detailed review of how to estimate the engine efficiency benefits of higher octane fuel—e.g., Alcohol and gasoline-alcohol blends also offer efficiency benefits independent of their octane value. —Leone et al. —Leone et al.

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GM and U Mich receive patent on plug-in series hybrid/extended range electric vehicle powertrain using multiple free piston linear alternator engines

Green Car Congress

The GM/U Mich patent envisages using multiple free-piston engines (240A through 240D in the patent drawing). Fuels can include gasoline blends, and alcohol blended hydrocarbon fuel grades. Ethanol blended hydrocarbon fuels can include higher ethanol blends (e.g. Click to enlarge.