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Title: Reactivity-controlled compression ignition drive cycle emissions and fuel economy estimations using vehicle system simulations

Journal Article · · International Journal of Engine Research
 [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
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In-cylinder blending of gasoline and diesel to achieve reactivity-controlled compression ignition has been shown to reduce NOX and soot emissions while maintaining or improving brake thermal efficiency as compared with conventional diesel combustion. The reactivity-controlled compression ignition concept has an advantage over many advanced combustion strategies in that the fuel reactivity can be tailored to the engine speed and load, allowing stable low-temperature combustion to be extended over more of the light-duty drive cycle load range. In this paper, a multi-mode reactivity-controlled compression ignition strategy is employed where the engine switches from reactivity-controlled compression ignition to conventional diesel combustion when speed and load demand are outside of the experimentally determined reactivity-controlled compression ignition range. The potential for reactivity-controlled compression ignition to reduce drive cycle fuel economy and emissions is not clearly understood and is explored here by simulating the fuel economy and emissions for a multi-mode reactivity-controlled compression ignition–enabled vehicle operating over a variety of US drive cycles using experimental engine maps for multi-mode reactivity-controlled compression ignition, conventional diesel combustion, and a 2009 port-fuel injected gasoline engine. Drive cycle simulations are completed assuming a conventional mid-size passenger vehicle with an automatic transmission. Multi-mode reactivity-controlled compression ignition fuel economy simulation results are compared with the same vehicle powered by a representative 2009 port-fuel injected gasoline engine over multiple drive cycles. Finally, engine-out drive cycle emissions are compared with conventional diesel combustion, and observations regarding relative gasoline and diesel tank sizes needed for the various drive cycles are also summarized.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1286695
Journal Information:
International Journal of Engine Research, Vol. 16, Issue 8; ISSN 1468-0874
Publisher:
SAGECopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

References (5)

Particulate Matter Characterization of Reactivity Controlled Compression Ignition (RCCI) on a Light Duty Engine conference April 2014
Reactivity controlled compression ignition and conventional diesel combustion: A comparison of methods to meet light-duty NOx and fuel economy targets journal June 2013
Reactivity controlled compression ignition combustion on a multi-cylinder light-duty diesel engine journal April 2012
Simulating the impact of premixed charge compression ignition on light-duty diesel fuel economy and emissions of particulates and NO x
  • Gao, Zhiming; Daw, C. Stuart; Wagner, Robert M.
  • Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, Vol. 227, Issue 1 https://doi.org/10.1177/0954407012459137
journal October 2012
A proposed methodology for estimating transient engine-out temperature and emissions from steady-state maps journal February 2010

Cited By (3)

Progress and recent trends in reactivity-controlled compression ignition engines journal July 2015
Evolution and current understanding of physicochemical characterization of particulate matter from reactivity controlled compression ignition combustion on a multicylinder light-duty engine journal August 2016
Activating low-temperature diesel oxidation by single-atom Pt on TiO2 nanowire array journal February 2020

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33 ADVANCED PROPULSION SYSTEMS
29 ENERGY PLANNING, POLICY, AND ECONOMY
reactivity-controlled compression ignition
dual-fuel
efficiency
low-temperature combustion