Understanding fuel anti-knock performances in modern SI engines using fundamental HCCI experiments
Y Yang, JE Dec, M Sjöberg, C Ji
Combustion and Flame | Elsevier | Published : 2015
Abstract Modern spark-ignition (SI) engine technologies have considerably changed in-cylinder conditions under which fuel autoignition and engine knock take place. In this paper, fundamental HCCI engine experiments are proposed as a means for characterizing the impact of these technologies on the knock propensity of different fuels. In particular, the impacts of turbocharging, direct injection (DI), and downspeeding on operation with ethanol and gasoline are investigated to demonstrate this approach. Results reported earlier for ethanol and gasoline on HCCI combustion are revisited with the new perspective of how their autoignition characteristics fit into the anti-knock requirement in moder..View full abstract
Awarded by U.S. Department of Energy's National Nuclear Security Administration
This work was performed at the Combustion Research Facility, Sandia National Laboratories, Livermore, CA. Support was provided by the U.S. Department of Energy, Office of Vehicle Technologies. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. Yi Yang also thanks the Early Career Research Grant from the University of Melbourne for supporting the writing of this paper.