Apparatus And Method for Caculating Spray Angle of Gasoline Direct Injector

摘要

The present invention relates to an apparatus for measuring the injection angle of a gasoline direct injection type injector, capable of individually measuring the injection angle of fuel injected from each of a plurality of injection holes formed in the gasoline direction injection type injector, and a method thereof. According to the present invention, the method comprises the following steps: (S1) spraying fuel through a plurality of injection holes formed on an injector tip; (S2) acquiring each spray pattern image on a plane spaced apart from the injector tip at a predetermined distance; (S3) converting each acquired spray pattern image into a black/white image and binarizing the black/white image; (S4) calculating both end boundary point positions (EP1, EP2) of the spray pattern image from a straight line (L0) connecting the position (P1) of the injector tip on the plane and the position (C) of the central point of each binarized spray pattern image when the Z-axis position of the plane is at zero in an orthogonal coordinate system; and (S5) using the position (P1) of the injector tip, the position (C) of the central point of the spray pattern image, and both the end point positions (EP1, EP2) to calculate injection angle with respect to each spray pattern image.