This content is not included in your SAE MOBILUS subscription, or you are not logged in.
An Examination of the Role of Formaldehyde in the Ignition Processes of a Dual Fuel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 1991 by SAE International in United States
Annotation ability available
The preignition processes in a dual fuel engine are described and the roles of the formation and consumption of formaldehyde in these and subsequent processes are discussed. Reference is made to the results of detailed chemical kinetic modelling of the oxidation reactions of the gaseous fuel component during the compression stage. This is supported by experimental evidence of the kinetic role of formaldehyde through its deliberate induction with the intake charge of a dual fuel engine over a range of operating conditions and fuels. It is suggested that the preignition reaction activity of the gaseous fuel-air charge during compression contributes significantly to the observed extension of the ignition delay in dual fuel engines at very low load conditions when relatively small gaseous fuel concentrations are being used. It is also shown that the deliberate changes in the concentrations of formaldehyde within the charge during compression can modify the rates of the preignition reactions of the diesel pilot and hence the ignition delay significantly.
- G.A. Karim - The University of Calgary, Department of Mechanical Engrg. Calgary, Alberta, Canada
- K. Ito - The University of Calgary, Department of Mechanical Engrg. Calgary, Alberta, Canada
- M. Abraham - The University of Calgary, Department of Mechanical Engrg. Calgary, Alberta, Canada
- L. Jensen - The University of Calgary, Department of Mechanical Engrg. Calgary, Alberta, Canada
CitationKarim, G., Ito, K., Abraham, M., and Jensen, L., "An Examination of the Role of Formaldehyde in the Ignition Processes of a Dual Fuel Engine," SAE Technical Paper 912367, 1991, https://doi.org/10.4271/912367.
- Brown, M. J. Dowdy, D. R. Reid, I. A. Robinson, C. Smith, D. B. 1989 “Application of Chemical Modelling to Combustion,” Proc. of the Int. Gas Research Conf. Tokyo, Japan 2 128
- Downs, D. Walsh, A. D. Wheeler, R. W. 1951 “A Study of the Reactions that Lead to ‘Knock’ in the Spark Ignition Engine” Proc. of Phil. Trans. of Roy. Soc. 243 463
- Glassman, I. 1987 Combustion 2nd Academic Press
- Karim, G. A. 1987 “The Dual Fuel Engine,” Automotive Engine Alternatives Evans Robert L. Plenum Press New York/London 83 104
- Karim, G. A. Kibrya, M. Lapucha, R. Wierzba, I. 1988 “Examination of the Combustion of a Fuel Jet in a Homogeneously Pre-Mixed Lean Fuel-Air Stream,” Proc. of the International Fuels & Lubricants Meeting and Exposition of the S.A.E. Portland, Oregon Paper # 881662 1 9
- Karim, G. A. Jones, W. Raine, R. R. 1989 “An Examination of the Ignition Delay Period in Dual Fuel Engines,” SAE International Fuels & Lubricants Meeting & Exposition Baltimore, Maryland SAE Paper # 892140 FL 97 103
- Karim, G. A. Hanafi, A. 1991 “An Analytical Examination of the Partial Oxidation of Rich Mixtures of Methane and Oxygen,” Proc. of 14th Annual Energy-Sources Technology Conference & Exhibition Houston, Texas 33 127 133
- Karim, G. A. Zhaoda, Y. 1988 “An Analytical Model for Knock in Dual Fuel Engines of the Compression Ignition Type,” Proc. of the International Congress of the SAE Detroit, Michigan SAE Paper # 880151 1 11
- Karim, G. A. Wierzba, I. 1983 “Comparative Studies of Methane and Propane as Fuels for Spark Ignition and Compression Ignition Engines,” Proc. of the International West Coast Meeting of the SAE Vancouver, B.C. SAE Paper # 831196 27 37
- Warnatz, J. 1984 “Chemistry of High Temperature Combustion of Alkanes up to Octane,” 20th Symposium (Int.) on Combustion The Combustion Institute 845
- Westbrook, C. Drayer, F. L. Schung, K. P. 1982 “A Comprehensive Mechanism for the Pyrolysis and Oxidation of Ethylene,” 19th Symposium (Int.) on Combustion The Combustion Institute 153