Nozzle plate for fuel injection device
AssigneeEnplas Corporation
InventorKoji NOGUCHI
Life of this patent
Estimating the term…
Abstract
In a nozzle plate, a portion of fuel flowing out from a fuel injection port of the fuel injection device is atomized by impinging on an interference body. At the same time, the flow of the portion of fuel is sharply bent and impinges on fuel which straightly advances and passes through a nozzle hole and an orifice thus turning the flow of fuel into a turbulent flow. Further, both end portions of the orifice form non-rounded sharpened corner portions. Hence, a liquid film of fuel injected from the corner portions and areas in the vicinity of the corner portions of the orifice is formed into a thin sharpened and pointed state whereby an end portion of the liquid film of fuel injected from the orifice is easily atomized due to a friction between the end portion of the liquid film of fuel and air.
Claims15
A nozzle plate for a fuel injection device mounted on a fuel injection port of a fuel injection device and provided with a nozzle hole through which fuel injected from the fuel injection port passes,
- wherein an outlet-side opening portion of the nozzle hole which is an opening of a fuel flow-out side is partially closed by an interference body so that an orifice which throttles the flow of fuel is formed by the outlet-side opening portion and the interference body, and
- wherein the interference body has an outer edge portion which forms a part of an opening edge of the orifice, a portion of fuel which passes through the nozzle hole is atomized by making the portion of the fuel which passes through the nozzle hole impinge on the interference body, and the flow of the fuel is formed into a turbulent flow such that atomization of the fuel which passes through the orifice in air is facilitated by sharply bending the flow of the portion of fuel which passes through the nozzle hole thus making the flow of the portion of fuel impinge on fuel which straightly advances and passes through the nozzle hole and the orifice, and
- wherein a corner portion of the opening edge of the orifice formed by the outlet-side opening portion of the nozzle hole and the interference body is formed into a non-rounded sharpened shape thus forming an end portion of a liquid film of fuel which passes through the orifice into a sharpened shape by which the end portion of the liquid film of fuel is easily atomized by a friction between the end portion of the liquid film of fuel and air.
A nozzle plate for a fuel injection device mounted on a fuel injection port of a fuel injection device and provided with a nozzle hole through which fuel injected from the fuel injection port passes,
- wherein an outlet-side opening portion of the nozzle hole which is an opening of a fuel flow-out side is partially closed by an interference body so that an orifice which throttles the flow of fuel is formed by the outlet-side opening portion and the interference body, and
- wherein the interference body has an arcuate outer edge portion which forms a part of an opening edge of the orifice, a portion of fuel which passes through the nozzle hole is atomized by making the portion of the fuel which passes through the nozzle hole impinge on the interference body, and the flow of the fuel is formed into a turbulent flow such that atomization of the fuel which passes through the orifice in air is facilitated by sharply bending the flow of the portion of fuel which passes through the nozzle hole thus making the flow of the portion of fuel impinge on fuel which straightly advances and passes through the nozzle hole and the orifice, and
- wherein a corner portion of the opening edge of the orifice formed by the outlet-side opening portion of the nozzle hole and the interference body is formed into a non-rounded sharpened shape thus forming an end portion of a liquid film of fuel which passes through the orifice into a sharpened shape by which the end portion of the liquid film of fuel is easily atomized by a friction between the end portion of the liquid film of fuel and air.
Dependencies are inferred from the claim text.