This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Effects of Fuel Volatility and Structure on HC Emissions from Piston Wetting in DISI Engines
Technical Paper
2001-01-1205
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
Piston wetting can be isolated from the other sources of HC emissions from DISI engines by operating the engine predominantly on a gaseous fuel and using an injector probe to impact a small amount of liquid fuel on the piston top. This results in a marked increase in HC emissions. All of our prior tests with the injector probe used California Phase 2 reformulated gasoline as the liquid fuel. In the present study, a variety of pure liquid hydrocarbon fuels are used to examine the influence of fuel volatility and structure. Additionally, the exhaust hydrocarbons are speciated to differentiate between the emissions resulting from the gaseous fuel and those resulting from the liquid fuel. It is shown that the HC emissions correspond to the Leidenfrost effect: fuels with very low boiling points yield high HCs and those with a boiling point near or above the piston temperature produce much lower HCs. As expected, there is a significant effect of fuel structure for fuels that have the same boiling point. For fuels with the same boiling point, the primary effect of structure appears to be its effect on unburned fuel emissions.
Recommended Content
Authors
Citation
Huang, Y., Alger, T., Matthews, R., and Ellzey, J., "The Effects of Fuel Volatility and Structure on HC Emissions from Piston Wetting in DISI Engines," SAE Technical Paper 2001-01-1205, 2001, https://doi.org/10.4271/2001-01-1205.Also In
References
- Stovell, C. Matthews R.D. Johnson B.E. Ng H. Larsen R. 1999 “Emissions and fuel economy of a 1998 Toyota with a direct injection spark ignition engine” SAE Paper 1999-01-1527
- Matthews R.D. Stovell C. Ng H. Larsen R. Johnson B.E. 1999 “Effects of load on emissions and NOx trap/catalyst efficiency for a direct injection spark ignition engine” SAE Paper 1999-01-1528
- Stanglmaier, R.H. Li J. Matthews R.D. 1999 “The effect of in-cylinder wall wetting location on the HC emissions from SI engines” SAE Paper 1999-01-0502
- Li, J. Matthews R.D. Stanglmaier R.H. Roberts C.E. Anderson R.W. 1999 “Further experiments on in-cylinder wall wetting in direct injected gasoline engines” SAE Paper 1999-01-3661
- Li, J. Huang Y. Alger T.F. Matthews R.D. Hall M.J. Stanglmaier R.H. Roberts C.E. Dai W. Anderson R.W. 2000 “Liquid fuel impingement on in-cylinder surfaces as a source of hydrocarbon emissions from direct injection gasoline engines” ASME Paper 2000-ICE-270, Fuel Injection, Combustion, and Engine Emissions 2 34-2 17 26 ASME Journal of Gas Turbines and Power
- Stovell, C.H. Matthews R.D. Huang Y. Johnson B.E. Larsen R. Ng H. Kirwan J. 2000 “Effect of fuel parameters on speciated hydrocarbon emissions from a Direct Injection Spark Ignition engine” SAE Paper 2000-01-1908
- Xiong, T.Y. Yuen M.C. 1991 “Evaporation of a liquid droplet on a hot plate” International Journal of Heat and Mass Transfer 34 7 1881 1894
- Kaiser, E.W. Siegl W.O. Henig Y.I. Anderson R.W. Trinker F.H. 1991 “Effect of fuel structure on emissions from a spark-ignited engine” Environmental Science and Technology 25 12 2005 2012
- Hashimoto, K. Inaba O. Akasaka Y. 2000 “Effects of fuel properties on the combustion and emission of a direct-injection gasoline engine” SAE Paper 2000-01-0253
- Eng, J.A. Leppard W.R. Najt P.M. Dryer F.L. 1998 “The effect of fuel composition on hydrocarbon emissions from a spark ignition engine: iso-octane/toluene and n-octane/toluene fuel mixtures” SAE Paper 982557
- Westbrook, C.K. 2000
- Curran, H.J. Gaffuri P. Pitz W.J. Westbrook C.K. 1998 “A comprehensive modeling study of n-heptane oxidation” Combustion and Flame 114 149 177
- Gardiner, W.C. 2000
- Robaugh, D. Tsang W. 1986 “Mechanism and rate of hydrogen atom attack on toluene at high temperatures” Journal of Physical Chemistry 90 4159 4163
- Mebel, A.M. Lin M.C. Yu T. Morokuma K. 1997 “Theoretical study of potential energy surface and thermal rate constants for the C6H5 + H2 and C6H6 + H reactions” Journal of Physical Chemistry A 101 3189 3196
- Atkinson, R. Carter, W.P.L Aschmann, S.M. Winer, A.M. Pitts, J.N. Jr 1984 “Kinetics of the reaction of OH radicals with a series of branched alkanes at 297±2K” International Journal of Chemical Kinetics 16 469 481
- Baulch, D.L. Bowers, M. Malcolm, D.G. Tuckerman, R.T. 1986 “Evaluated kinetic data for high-temperature reactions. Volume 5. Part 1. Homogeneous gas phase reactions of the hydroxyl radical with alkanes” Journal of Physical Chemistry Ref. Data 15 2 465 592
- Kramp, K Paulson, S.E. 1998 “On the Uncertainties in the rate coefficients for OH reactions with hydrocarbons, and the rate coefficients of the 1,3,5-trimethylbenzene and m-xylene reactions with OH radicals in the gas phase” Journal of Physical Chemistry A 102 2685 2690