Abstract
A rapid compression machine is very useful for the research to analyse fundamentally the spray combustion process of diesel engine. So far as we know about the air motion in the combustion chamber, there exists a considerable literature on the contribution of swirl to the combustion process, but little work has been done in order to estimate that of squish.
This paper presents the effects of the squish on the ignition delay and the heat release rate by means of a rapid compression machine. As a result, the presence of the squish makes the ignition delay shorter, the total heat release increases about 50% by the squish as compared with no squish, and the squish improves the utilization of air not only in the radial direction of cylinder but also in the tangential direction.
