A nozzle body of a fuel injector includes a proximal end, a distal end spaced apart from the proximal end, and at least one spray hole positioned at the distal end. The at least one spray hole includes an inlet having a first cross-sectional shape and an outlet having a second cross-sectional shape different from the first cross-sectional shape. In other embodiments, the nozzle body has a first row of spray holes and a second row of spray holes, and a cross-sectional shape of spray holes in the first row is different from the cross-sectional shape of spray holes in the second row.

A fuel injector includes an injector body with a fuel chamber configured to receive fuel from a fuel line, an injector tip provided at an end of the injector body, and one or more nozzle assemblies provided in the injector tip. The one or more nozzle assemblies have a fuel channel in fluid communication with the fuel chamber, a premixing tube fluidly connected to the fuel channel, and a port fluidly connected to the premixing tube. The premixing tube has an orifice providing an outlet for the injector tip.

A mixer assembly having a plurality of mixer vanes, each of the plurality of mixer vanes having a first end, a second end, and a body portion extending between the first end and the second end, the body portion having a length, a width, a thickness, a cross-sectional area, a curvature, and a twist, wherein each of the plurality of mixer vanes has a 3-dimensional shape defined by the length, width, thickness, cross-sectional area, curvature, and twist of the body portion, and wherein at least one of the plurality of mixer vanes has a non-uniform 3-dimensional shape.

A plurality of injection holes include at least one flat injection hole while an outlet opening of the at least one flat injection hole has a long axis and a short axis, and the at least one flat injection hole includes at least one specific flat injection hole. The specific flat injection hole has an injection hole axis that connects between a center of an inlet opening and a center of the outlet opening, and the long axis of the outlet opening is perpendicular to a plane which includes the injection hole axis and is parallel with the valve axis. An inner wall of the outlet opening has two planar portions which are opposed to each other while the long axis is interposed between the planar portions.

A fuel injector for supplying fuel to a fuel consuming devise includes a fuel inlet for receiving the fuel, a nozzle tip for dispensing the fuel from the fuel injector, a conduit for communicating the fuel from the fuel inlet to the nozzle tip, a valve seat, and a valve selectively seatable and unseatable with the valve seat for selectively preventing and permitting fuel flow out of the nozzle tip. The nozzle tip includes a non-circular recess on a downstream side thereof and a metering hole on an upstream side thereof opening into the non-circular recess to allow fuel to exit the nozzle tip, the metering hole having a smaller area than the non-circular recess.

A throttle body fuel injection system including a throttle body with at least one air intake, a fuel injector coupled to the throttle body at a fuel port and an annular ring coupled to the cylindrical inner wall of the air intake. The annular ring includes a primary fuel discharge orifice adjacent to the fuel port and a plurality of secondary fuel discharge orifices arranged radially around the annular ring for spraying atomized fuel into the air intake.

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.

A fuel injector tip for a fuel injector. The fuel injector tip includes an inner tip surface and an outer tip surface that is opposite to the inner tip surface. At least one orifice extends through the fuel injector tip from the inner tip surface to the outer tip surface, and is configured to atomize fuel flowing therethrough to generate a fuel mist. The fuel injector tip is three-dimensionally printed.

A mist forming method using a fluid injection valve formed of a valve seat, a valve body, and a nozzle portion or an injection hole plate having injection holes, and configured to turn in-hole flows and flows immediately below the injection holes into substantially liquid film flows. Directions of jets from the injection holes are not necessarily brought into coincidence with a center axis direction of the injection holes and are not necessarily crossed with one another in a downstream part, and after the jets turned into mists at a position downstream of a break length position, the mists are allowed to come close or gather by the Coanda effect so as to appear substantially as one solid mist, and allowed to keep gathering until catching of ambient air and a resulting air flow along a downstream flow direction in a predetermined in-mist portion attenuate.

In an injection hole of a nozzle, a maximum value of a longitudinal length of an inlet, which is measured in a direction of an inlet longitudinal axis of the inlet, is larger than a maximum value of a longitudinal length of an outlet, which is measured in a direction of an outlet longitudinal axis of the outlet. A rear end edge of an opening edge of the inlet is shaped into an arc. When the maximum value of the inlet is made larger than the maximum value of the outlet, an upstream end of the inlet can be placed at a further upstream side, so that a turn angle of a fuel flow can be reduced to increase the flow coefficient. Furthermore, when the rear end edge is shaped into the arc, the maximum value of the inlet can be increased.