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Onboard Gasoline Separation for Improved Vehicle Efficiency

Journal Article
ISSN: 1946-3952, e-ISSN: 1946-3960
Published April 01, 2014 by SAE International in United States
Onboard Gasoline Separation for Improved Vehicle Efficiency
Citation: Partridge, R., Weissman, W., Ueda, T., Iwashita, Y. et al., "Onboard Gasoline Separation for Improved Vehicle Efficiency," SAE Int. J. Fuels Lubr. 7(2):366-378, 2014,
Language: English


ExxonMobil, Corning and Toyota have collaborated on an Onboard Separation System (OBS) to improve gasoline engine efficiency and performance. OBS is a membrane based process that separates gasoline into higher and lower octane fractions, allowing optimal use of fuel components based on engine requirements. The novel polymer-ceramic composite monolith membrane has been demonstrated to be stable to E10 gasoline, while typically providing 20% yield of ∼100 RON product when using RUL 92 RON gasoline. The OBS system makes use of wasted exhaust energy to effect the fuel separation and provides a simple and reliable means for managing the separated fuels that has been demonstrated using several generations of dual fuel test vehicles. Potential applications include downsizing to increase fuel economy by ∼10% while maintaining performance, and with turbocharging to improve knock resistance.