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Title: Fuel property effects on low-speed pre-ignition

Abstract

This work explores the dependence of fuel distillation and flame speed on low-speed pre-ignition (LSPI). Findings are based on cylinder pressure analysis, as well as the number count, clustering, intensity, duration, and onset crank angle of LSPI events. Four fuels were used, with three of the fuels being blends with gasoline, and the fourth being neat gasoline. The blended fuels consisted of single molecules of different molecular types: a ketone (cyclopentanone), an alcohol (2-methyl-1-butanol), and an aromatic (ethylbenzene). All three pure molecules have RON values within ±2 and boiling points within ±5 °C. These fuels were blended with gasoline to a 25% mass fraction and were used to run the engine at identical LSPI prone operating conditions. The findings highlight that fuels with similar boiling properties and octane numbers can exhibit similar LSPI number counts, but with vastly different LSPI magnitudes and intensities. Moreover, the results highlight fundamental fuel properties such as flame speed are critical to characterizing the LSPI propensity and behavior of the fuel.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels, Engines, and Emissions Research Center and National Transportation Research Center
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies Office (EE-3B)
OSTI Identifier:
1439540
Alternate Identifier(s):
OSTI ID: 1439940
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Published Article
Journal Name:
Fuel
Additional Journal Information:
Journal Volume: 230; Journal Issue: C; Journal ID: ISSN 0016-2361
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; LSPI; Preignition; Superknock; Spark ignition; Fuel effects

Citation Formats

Jatana, Gurneesh S., Splitter, Derek A., Kaul, Brian C., and Szybist, James P. Fuel property effects on low-speed pre-ignition. United States: N. p., 2018. Web. doi:10.1016/j.fuel.2018.05.060.
Jatana, Gurneesh S., Splitter, Derek A., Kaul, Brian C., & Szybist, James P. Fuel property effects on low-speed pre-ignition. United States. doi:10.1016/j.fuel.2018.05.060.
Jatana, Gurneesh S., Splitter, Derek A., Kaul, Brian C., and Szybist, James P. Wed . "Fuel property effects on low-speed pre-ignition". United States. doi:10.1016/j.fuel.2018.05.060.
@article{osti_1439540,
title = {Fuel property effects on low-speed pre-ignition},
author = {Jatana, Gurneesh S. and Splitter, Derek A. and Kaul, Brian C. and Szybist, James P.},
abstractNote = {This work explores the dependence of fuel distillation and flame speed on low-speed pre-ignition (LSPI). Findings are based on cylinder pressure analysis, as well as the number count, clustering, intensity, duration, and onset crank angle of LSPI events. Four fuels were used, with three of the fuels being blends with gasoline, and the fourth being neat gasoline. The blended fuels consisted of single molecules of different molecular types: a ketone (cyclopentanone), an alcohol (2-methyl-1-butanol), and an aromatic (ethylbenzene). All three pure molecules have RON values within ±2 and boiling points within ±5 °C. These fuels were blended with gasoline to a 25% mass fraction and were used to run the engine at identical LSPI prone operating conditions. The findings highlight that fuels with similar boiling properties and octane numbers can exhibit similar LSPI number counts, but with vastly different LSPI magnitudes and intensities. Moreover, the results highlight fundamental fuel properties such as flame speed are critical to characterizing the LSPI propensity and behavior of the fuel.},
doi = {10.1016/j.fuel.2018.05.060},
journal = {Fuel},
number = C,
volume = 230,
place = {United States},
year = {Wed May 30 00:00:00 EDT 2018},
month = {Wed May 30 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.fuel.2018.05.060

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