Date of Award
Mechanical, Automotive, and Materials Engineering
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This study was undertaken to see if the pressure pulses which propagate through all automobile induction manifold could be simulated using a computer generated signal fed into amplified speakers attached to a bench mounted intake manifold. It was found that the two measured time domain signals compared favourably to the predicted theoretical time domain curve. The small differences in the experimentally generated time domain signal were accounted to non-linearities in the performance of the speakers used to generate the pressure pulses. The calculated mean and standard deviations for the two measured time signals also compared favourably which was further reinforced by the determination of the correlation coefficient and covariance of the two signals. The Fast Fourier Transform (FFT) analysis provided analogous results between the predicted theoretical and two measured signals with a fundamental frequency at approximately 80 Hz and second and third harmonics occurring at 160 Hz and 240 Hz respectively. While the pressure pulses produced by the experimental simulation model at 2400 RPM closely paralleled the results produced by the theoretical model and actual engine, it is recommended that additional tests be performed at different RPMs. This would, however, require speakers better capable of producing lower frequencies and a faster computer in order to simultaneously generate the pressure signal and perform all analysis in real time. (Abstract shortened by UMI.)Dept. of Mechanical, Automotive, and Materials Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1996 .N68. Source: Masters Abstracts International, Volume: 34-06, page: 2413. Adviser: R. G. S. Gaspar. Thesis (M.A.Sc.)--University of Windsor (Canada), 1996.
Novak, Colin James., "Experimental acoustic model for intake manifold testing." (1996). Electronic Theses and Dissertations. 2016.