AIR FLOW Through Intake Valves

THE results of many flow tests made in the Sloan Laboratory at MIT on various valve and port combinations are presented in this paper.

A rational basis is developed for comparing valve and port combinations of different sizes and design, and theoretical factors are discussed. It is indicated that the conventional valve and port design may be greatly improved by comparatively simple modifications.

Most of the improvements appear to be due to the reduction of flow separation by eliminating sharp corners. A comparison of test conditions with actual operating conditions indicates how valve flow tests should be made and interpreted.