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US 10,502,171 B2Granted
Liquid injector atomizer with colliding jets
AssigneeNostrum Energy Pte. Ltd.
InventorsNirmal Mulye, Shrikrishna Sane, Osanan L. Barros Neto
Life of this patent
Estimating the term…
Abstract
A liquid injector for injection of liquids into internal combustion engines is provided. The injectors have a plurality of jets aimed at a common collision point, where at least two jet streams collide to create a finely atomized liquid due to kinetic energy dissipated by the impact of the liquid streams. The angle formed by the jets, the pressure applied and the distance at which the jets collide is such that the loss of forward momentum is greater than the energy required to create particles smaller than 5 microns. Liquids injected may include gasoline, diesel-type fuels, or water. The injectors may be employed for port injection or direct injection.
Claims28
A liquid injector that produces an atomized liquid comprising:
- a. a pressurized source of a liquid fed into a body of the injector, wherein the body has a liquid inlet, a liquid metering means within the body, and a liquid outlet comprising a nozzle, and wherein the body has a generally circular cross section with a central axis;
- b. wherein the nozzle comprises the central axis, an interior end, an exterior end, a concave or indented conical section on the exterior end, and a plurality of liquid passages, wherein each liquid passage is in fluid communication with a respective orifice within the concave or indented conical section of the nozzle from which pressurized jets of the liquid originate, wherein each jet is aimed at a common focal point external to the concave or indented conical section, wherein the collision of the pressurized liquid jets at the focal point creates an atomized form of the liquid, wherein each liquid passage comprises two sections, with a first section extending from the interior end outward from the central axis at an angle toward the exterior end, and a second section intersecting the first section and extending at an angle toward the central axis and the exterior end of the nozzle, wherein each liquid passage terminates at the exterior end with the respective orifice;
- c. wherein each included angle of the jets is between 30° and 180°;
- and
- d. wherein the metering means provides a precise quantity of liquid flow at a precise and controllable start and stop time.
2 more elements
A nozzle for a liquid injector, comprising:
- a. a cylindrical body that comprises a central axis, an interior end, an exterior end, a concave or indented conical section on the exterior end, and two or more liquid passages, wherein each liquid passage is in fluid communication with a respective orifice within the concave or indented conical section of the nozzle from which pressurized liquid jets of the liquid originate, wherein each jet is aimed at a common focal point external to the concave or indented conical section, wherein the collision of the pressurized liquid jets at the focal point creates an atomized form of the liquid, wherein each liquid passage comprises two sections, with a first section extending from the interior end outward from the central axis at an angle toward the exterior end, and a second section intersecting the first section and extending at an angle toward the central axis and the exterior end of the nozzle, wherein each liquid passage terminates at the exterior end with the respective orifice;
- b. wherein each included angle of the jets is between 30° and 180°.
A nozzle for a liquid injector, comprising:
- a. a seat for a pintle ball, the seat having at least two inlet orifices positioned thereon;
- b. an outer surface having at least two outlet orifices positioned thereon;
- and
- c. at least two passages for transmitting a liquid from the inlet orifices to the outlet orifices, respectively, each passage comprising:
- a first linear passage extending from an edge of the outer surface to a respective inlet orifice of the at least two inlet orifices;
- a second linear passage extending from a respective outlet orifice of the at least two outlet orifices to an intersection point along the first linear passage;
- and a plug inserted into the first passage at the edge of the outer surface;
- and
- d. wherein each of the at least two passages and each of the at least two outlet orifices are oriented so that pressurized liquid transmitted through each passage forms a jet stream of pressurized liquid, wherein the nozzle comprises a concave or indented conical section at an exterior end of the nozzle, wherein the at least two outlet orifices are within the concave or indented conical section, wherein each jet is aimed at a common focal point external to the concave or indented conical section, wherein the collision of the pressurized liquid jets at the focal point creates an atomized form of the liquid,
- e. wherein the included angle of the jets is between 30° and 180°.
7 more elements
A liquid injector that produces an atomized liquid comprising:
- a. a pressurized source of a liquid fed to a body of the injector, wherein the body has a liquid inlet, a liquid metering means, and a liquid outlet comprising a nozzle;
- b. wherein the nozzle comprises four or more jet orifices from which pressurized liquid jets of the liquid originate, wherein the nozzle comprises a concave or indented conical section at an exterior end of the nozzle, wherein the four or more orifices are within the concave or indented conical section, wherein two of the pressurized liquid jets are aimed at a first common focal point external to the concave or indented conical section, and another two of the pressurized liquid jets are aimed at a second common focal point external to the concave or indented conical section, wherein the collision of pressurized liquid jets at the focal points creates an atomized form of the liquid, wherein the nozzle further comprises four or more liquid passages, wherein each liquid passage is in fluid communication with a respective jet orifice, wherein each passage comprises two sections, with a first section extending from an interior end of the nozzle outward from a central axis of the nozzle at an angle toward the exterior end, and a second section intersecting the first section and extending at an angle toward the central axis and the exterior end of the nozzle, wherein each passage terminates at the exterior end with a respective orifice;
- c. wherein the included angle of any two jets aimed at the same focal point is between 30° and 180°;
- and
- d. wherein the metering means provides a precise quantity of liquid flow at a precise and controllable start and stop time.
2 more elements
A liquid injector that produces an atomized liquid comprising:
- a. an injector housing;
- b. a liquid inlet configured to be coupled to an external source of liquid;
- c. a pintle valve in fluid communication with the liquid inlet, the pintle valve being configured to adjustably meter a flow of liquid from the external source of liquid;
- and
- d. a plurality of liquid passages in fluid communication with the pintle valve and terminating at respective inclined orifices formed at an exterior surface of the injector housing, the liquid passages being dimensioned and inclined to direct respective jets of liquid to a common collision point located at a defined position distant from a plane on which the inclined orifices are formed,
- e. wherein the defined position is located along a central axis of the atomizing injector at a distance from the exterior surface determined to minimize impact of atomized liquid on the exterior surface and less than the liquid length distance satisfying the lesser of:
- L=d×C×SM and L=(Ao×ΔP)/[σ+K×d×ΔP/ρL], K=(ρaπCdc/3), where d is the inclined orifice diameter, C is a constant, SM is a coefficient defined by (ν/σ)×(ΔP×ρ)1/2, ν is kinematic viscosity, σ is the surface tension, ΔP is the pressure drop across the inclined orifice, and ρ is the fluid density, Ao is an orifice area, ρL is liquid density, ρa is air density, and Cdc is a skin friction drag coefficient for cylinder in axial flow.
4 more elements
A process for making an atomizing injector comprising:
- a. boring two or more first liquid passages extending from an external surface of an injector body to a pintle valve seat disposed in a cavity formed in the injector body;
- b. boring second liquid passages extending from the external surface of the injector body to intersect a respective first liquid passage at a non-end region thereof, the second liquid passages terminating at orifices formed on the external surface of the injector body and inclined at an angle configured to direct jets exiting the orifices to collide at a defined point external of the injector body, wherein the external surface of the injector body comprises a concave or indented conical section, wherein the orifices are within the concave or indented conical section, wherein the jets are aimed at a common focal point external to the concave or indented conical section;
- and
- c. sealing the two or more first liquid passages between the external surface of the injector body and the portions of the two or more first fluid passages where the two or more first fluid passages intersect with the second liquid passages, respectively.
1 more element
A process for making an atomizing injector comprising:
- a. boring first liquid passages extending through opposing external surfaces of a valve seat, where one opposing external surface is formed into a seat for a pintle;
- b. boring second liquid passages extending from an external surface of a body of the injector to a surface forming a cavity for receiving the valve seat, the second liquid passages terminating at orifices formed on the external surface of the injector body and inclined at an angle configured to direct jets exiting the orifices to collide at a defined point, wherein the external surface of the injector body comprises a concave or indented conical section, wherein the orifices are within the concave or indented conical section, wherein the defined point is external to the concave or indented conical section;
- c. inserting the valve seat into the cavity;
- d. aligning openings of the first liquid passages with respective openings of the second liquid passages;
- and
- e. affixing the valve seat to the injector body.
3 more elements
Dependencies are inferred from the claim text.