A Laboratory Simulation and Mechanism for the Fuel Dependence of SI Combustion Chamber Deposit Formation 952445
The formation of combustion chamber deposits in modern SI engines is predominantly derived from hydrocarbon fuels and occurs as a consequence of the quenching action of the combustion chamber walls on the flame. A laboratory experiment has been designed which enables rapid generation of deposit material in the form of viscous brown liquids. Heating these deposits produces material that is consistent in composition and physical appearance with mature engine deposits. The deposit-forming tendency of a number of individual hydrocarbon species has been determined. The amount of deposit increases with i) the amount of unsaturation present in the molecular structure and ii) the boiling point of the hydrocarbon fuel being burned. A structurally derived parameter for each hydrocarbon molecule is found to correlate well with deposition rate, allowing a unified treatment of the different generic forms of hydrocarbons in which deposit-forming tendency is linked to molecular structure.
Citation: Price, R., Wilkinson, J., Jones, D., and Morley, C., "A Laboratory Simulation and Mechanism for the Fuel Dependence of SI Combustion Chamber Deposit Formation," SAE Technical Paper 952445, 1995, https://doi.org/10.4271/952445. Download Citation
Author(s):
R. J. Price, J. P. T. Wilkinson, D. A. J. Jones, C. Morley
Affiliated:
Shell Research Ltd.
Pages: 18
Event:
1995 SAE International Fall Fuels and Lubricants Meeting and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Gasoline Additives and Performance-SP-1118, SAE 1995 Transactions: Journal of Fuels and Lubricants-V104-4
Related Topics:
Combustion chambers
Spark ignition engines
Hydrocarbons
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