Multi-dimple orifice disc for a fluid injector, and methods for constructing and utilizing same

A fluid injector for injecting fluid, the fluid injector comprising:

• a body;
• a fluid passageway defined in the body and extending from an inlet to an outlet of the fluid injector;
• a valve seat disposed internally of the body and forming part of the fluid passageway;
• a valve element that is selectively reciprocated relative to the valve seat to close and open the passageway to fluid flow by seating and unseating the valve element on and from the valve seat, respectively;
• and
• an orifice disc disposed in the fluid passageway downstream of the valve seat in a direction of the fluid flow through the fluid injector, the orifice disc including a plurality of dimples and a plurality of orifices defined through the orifice disc, each orifice is disposed along a dimple and each dimple has an asymmetrical cross-section,
• wherein the disc includes an upstream surface and a downstream surface, and each dimple includes a first inner surface that is at least partly elliptical and an opening along the upstream surface that is circular.