On the Advantages of E100 Over Gasoline in Down-Sized, Turbo-Charged, Direct-Injected, Variable Valve Actuated, and Stoichiometric S.I. Engines 2011-28-0020
Current flexi fuel gasoline and ethanol engines have efficiencies generally lower than dedicated gasoline engines. Considering ethanol has a few advantages with reference to gasoline, namely the higher octane number and the larger heat of vaporization, the paper explores the potentials of dedicated pure ethanol engines using the most advanced techniques available for gasoline engines, specifically direct injection, turbo charging and variable valve actuation. Computations are performed with state-of-the-art, well validated, engine and vehicle performance simulations packages, generally accepted to produce accurate results targeting major trends in engine developments. The higher compression ratio and the higher boost permitted by ethanol allows larger top brake efficiencies than gasoline, while variable valve actuation produces small penalties in efficiency changing the load.
Citation: Boretti, A., "On the Advantages of E100 Over Gasoline in Down-Sized, Turbo-Charged, Direct-Injected, Variable Valve Actuated, and Stoichiometric S.I. Engines," SAE Technical Paper 2011-28-0020, 2011, https://doi.org/10.4271/2011-28-0020. Download Citation
Alberto A. Boretti
Missouri University of Science and Technology
16th Asia Pacific Automotive Engineering Conference