Abstract: Apparatuses for immobilizing fuel injection apparatuses are disclosed. A coupling member couples a fuel injection apparatus with an injector body of an engine. The coupling member includes a top surface, a bottom surface, a side surface, and an opening extending from the top surface to the bottom surface. The opening receives the fuel injection apparatus. The coupling member also includes a protruding portion extending from the bottom surface or the side surface which comes into contact with the injector body to prevent rotational movement of the fuel injection apparatus.

Abstract: The present disclosure provides a fuel injector, comprising: a body including a plurality of body alignment features; a nozzle including a plurality of nozzle alignment features and a plurality of nozzle holes for injecting fuel; and a plurality of alignment guides configured to mate with the plurality of body alignment features and the plurality of nozzle alignment features to align the nozzle with the body such that the plurality of nozzle holes is in a desired orientation relative to the body.

Abstract: An injector includes a nozzle body extending along a longitudinal axis and at least one spray hole extending through a portion of the nozzle body to output a fluid from the injector. The spray hole includes at least one groove. The groove is configured to facilitate efficient mixing of the fluid with air or other surrounding materials for enhanced performance of the injector and/or other components associated with the injector.