AXIAL FLOW ROTARY VALVE FOR AN ENGINE

摘要

An axial flow rotary valve (1) for an engine, the valve rotatable about an axis (12). The valve having an inlet port (2) extending from an axial opening (5) and terminating as a peripheral opening (7). The port having a throat (22), with a cross sectional area at least 2% less than the axial opening, at a distance of at least 0.2 times the length of the peripheral opening from the end of the peripheral opening closest to the axial opening, and a port floor (19) extending from the first end to the axial opening. The port having a port floor profile (37) generated by the intersection of the port floor with any plane coincident with the axis intersecting the port floor wherein the angle (a) between the tangent to the profile and the axis is less than 60 degrees over at least 75% of the length of the profile.