Apparatus, system, and method for shaping a valve orifice

摘要

An apparatus, system, and method are disclosed for optimizing a valve orifice shape. According to one representative embodiment, a method includes determining a specified relationship between a valve position and an output characteristic, and determining an orifice profile. The method also includes determining a relationship of an orifice area to the output characteristic. Further, the method includes shaping an orifice in a valve based on the orifice profile and the specified relationship between the valve position and the output characteristic. According to the method, the valve should approximately exhibit the specified relationship.

主权项

1. A method for optimizing the cross-sectional shape of an enclosed flow-through passage formed in a rotary valve, the enclosed flow-through passage extending from an intake orifice on one side of the rotary valve to an outlet orifice on an opposite side of the rotary valve, wherein a cross-sectional shape and size of the enclosed flow-through passage are constant along the entire enclosed flow-through passage, the cross-sectional shape being defined by an orifice profile having a leading edge, a trailing edge, and opposing sidewalls extending between the leading and trailing edges, the method comprising:
determining a linear relationship between a change in a position of the rotary valve and a change in an output characteristic; determining, via a calibration valve coupled to an engine, the orifice profile configured to produce the linear relationship; and shaping the cross-sectional shape of the enclosed flow-through passage in the rotary valve based on the orifice profile such that the rotary valve exhibits approximately the linear relationship, wherein the rotary valve produces a substantially uniform change in the output characteristic for a substantially uniform change in the position of the rotary valve, and wherein the output characteristic is a torque-speed of the engine.