In-cylinder Air Swirl in an Overhead Valve Type Engine : Effects of Intake Ports

概要

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The effects of two types of intake ports on swirl characteristics were investigated in motoring and steady flow tests. One port was a directional type and the other was a spiral type. Two methods for predicting swirl speeds were also checked for their availabilities. The conclusions are as follows : Velocity profiles of swirl at various place inside cylinder are not similar to each other but variable remarkably. The swirl speed distribution along the cylinder axis, however, is almost uniform. A swirl producing ability of intake port is not necessarily assessed by the result of a steady flow test using a paddle wheel anemometry. Predicted swirl speeds are affected by intake ports.
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