Investigation of onboard fuel separation for passenger vehicles

Energy, economic, and environmental benefits assessment of co-optimized engines and bio-blendstocks

“…8 Such technologies, however, are generally limited by the anti-knock quality of the available market gasolines, commonly described in terms of the research and motor octane numbers (RON and MON, respectively). 9,10 Prototype engines built with novel design concepts that allow for studying the impact of fuel octane number on engine performance highlighted the importance of RON in contributing to enhanced engine efficiency. 11 A more octane-responsive engine design supports larger increases in fuel efficiency than a less octane-responsive engine design, 12 highlighting the importance of engine and fuel co-design and co-optimization for possibly achieving the largest engine efficiency gain.…”

“…Meanwhile, an octane-on-demand concept, an engine-fuel technology characterized by the use of two fuels with different octane quality, has been introduced and examined to address challenges associated with production and blending of high-octane fuel components such as ethanol or other octane boosters with the petroleum gasoline blendstock. 10,[13][14][15] Vehicles with high-efficiency engines based on improvements in fuels and engines could lower the total cost of vehicle ownership for consumers, support economic development, and offer environmental benefits. Biomass feedstocks can produce blendstocks with certain desirable fuel properties, such as high RONs 6,16,17 and high octane sensitivity, both of which increase engine efficiency.…”