The Intensity of Knock in an Internal Combustion Engine: An Experimental and Modeling Study

Paper #:
  • 922327

Published:
  • 1992-10-01
Citation:
Cowart, J., Haghgooie, M., Newman, C., Davis, G. et al., "The Intensity of Knock in an Internal Combustion Engine: An Experimental and Modeling Study," SAE Technical Paper 922327, 1992, https://doi.org/10.4271/922327.
Pages:
11
Abstract:
Experimental data have been obtained that characterize knock occurrence times and knock intensities in a spark ignition engine operating on indolene and 91 primary reference fuel, as spark timing and inlet temperature were varied. Individual, in-cylinder pressure histories measured under knocking conditions were conditioned and averaged to obtain representative pressure traces. These averaged pressure histories were used as input to a reduced and detailed chemical kinetic model. The time derivative of CO concentration and temperature were correlated with the measured knock intensity and percent cycles knocking. The goal was to evaluate the potential of using homogenous, chemical kinetic models as predictive tools for knock intensity.
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