The Effect of Chamber Geometry on Spark-Ignition Engine Combustion

The way in which combustion chamber geometry affects combustion in SI engines was studied using a quasi-dimensional cycle simulation. Calculations were performed to investigate the following questions: (i) the sensitivity of geometric effects on combustion to engine operating conditions; (ii) the differences in burn duration between ten chamber geometries and spark plug locations; and (iii) the relative merits of improved chamber design and amplified turbulence as means to reduce burn duration. The results from these studies are presented and discussed.

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