Title: The effect of cyclic dispersion of combustion pressure on working parameters of a spark ignition engine

Authors: J. Janula

Addresses: Scientific Industrial Centre for Vehicle Design, Radom, Poland

Abstract: The paper deals with the phenomenon of cyclic dispersion of firing pressure in an Otto engine and some factors affecting this process. On the basis of the results of investigations carried out with the use of an experimental engine, criteria for evaluation of the process have been determined and expressed as a function of variable working conditions of the engine. From the example of auxiliary systems employed in the engine experiment some possibilities of practical reduction of cyclic dispersion of firing pressures have been presented. Some attempts have been made to find a correlation between the cyclic dispersion of firing pressure and economy of the engine as well as the content of toxic components in the exhaust gases.

Keywords: vehicle design; combustion pressure; cyclic dispersion; spark ignition engines; flame propagation; irregularities; fuel feeding; boundary layer thickness; air-fuel ratio; stratification; combustion chambers; swirl; turbulence; exhaust gas residues; Otto engine.

DOI: 10.1504/IJVD.1983.061308

International Journal of Vehicle Design, 1983 Vol.4 No.6, pp.587 - 604

Published online: 25 May 2014 *

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