Effects Of High-Octane E25 On Two Vehicles Equipped With Turbocharged, Direct-Injection Engines

Technical Report · Sat Sep 01 00:00:00 EDT 2018

DOI:https://doi.org/10.2172/1470897· OSTI ID:1470897

West, Brian H.  ^[1]; Huff, Shean P.  ^[1]; Moore, Larry G. ^[1]; DeBusk, Melanie Moses  ^[1]; Sluder, Scott  ^[1]

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1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Vehicle manufacturers are developing and introducing new technologies to improve fuel economy and reduce vehicle carbon dioxide (CO₂) emissions to comply with increasingly challenging regulations. Despite growing interest in electric vehicles, spark-ignition (SI) engines dominate the light-duty market in the U.S. and are expected to re main in wide use for decades. There is growing interest in making use of fuels with increased octane number to help improve engine efficiency through increased compression ratio, downsizing with turbocharging, and downspeeding. Regular gasoline in the U.S. is generally rated at 87 AKI (anti-knock index), where the AKI is defined as the a verage of the Research Octane Number¹ (RON) and the Motor Octane Number² (MON).

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1470897
• Report Number(s): ORNL/TM-2018/814
• Country of Publication: United States
• Language: English