Unidirectional fuel nozzle for improving fuel atomization in a carburetor or similar apparatus

Abstract

The present invention generally relates to a method and device that enhances fuel atomization in a carburetor or a similar apparatus. Specifically, it introduces a unidirectional fuel nozzle that is designed to improve the atomization of fuel injected into the fuel-air mixing chamber of a combustion engine. The fuel nozzle comprises a cylindrical body with a plurality of perforations on one half and a plurality of dimples on the outer surface of the other half. Each dimple is designed with an air turbulator, which creates turbulence on the surface of the fuel nozzle in response to the air pressure, delaying the separation of the air from the surface of the fuel nozzle. As a result, fuel droplets break down further, improving fuel atomization. This enhances the combustion efficiency of the engine by allowing the fuel to mix with air more effectively.

Claims

1. A method for improving fuel atomization in a carburetor by a fuel nozzle, the fuel nozzle comprising a cylindrical body having an outer surface and a fuel tunnel disposed centrally inside the cylindrical body, wherein the fuel tunnel being defined by a central opening that cuts through the length of the cylindrical body forming an inner surface therein; a plurality of perforations disposed on one half of the cylindrical body, wherein each of the perforations communicates the inner surface and the outer surface of the cylindrical body and terminates with an air turbulator, being defined by a hemispherical cavity at the outer surface of the cylindrical body; and a plurality of dimples disposed on the outer surface of the other half of the cylindrical body, wherein each of the dimples is defined by a hemispherical cavity at the outer surface of the cylindrical body; the method comprising the acts of: allowing air to enter the carburetor; generating air vortices on the outer surface of the fuel nozzle as the allowed air flows through each of the air turbulator of the plurality of perforations and through the plurality of dimples; and ejecting fuel droplets through the plurality of perforations to the carburetor's air-fuel mixing chamber, wherein the ejected fuel droplets are atomized by the generated air vortices.

2. The method according to claim 1, wherein both the plurality of perforations and dimples are arranged in circular rows around the circumference of the cylindrical body.

3. The method according to claim 2, wherein the circular rows are further configured in staggered arrangement.

4. The method according to claim 1, wherein each of the perforations faces the downstream side of the fuel nozzle.

5. The method according to claim 4, wherein each of the dimples faces the upstream side of the fuel nozzle.

6. The method according to claim 1, further comprising a ferrule disposed around on one end portion of the cylindrical body.

7. A fuel nozzle for improving fuel atomization in a carburetor comprising: a cylindrical body having an outer surface and a fuel tunnel disposed centrally inside the cylindrical body, wherein the fuel tunnel being defined by a central opening that cuts through the length of the cylindrical body forming an inner surface therein; a plurality of perforations disposed on one half of the cylindrical body, wherein each of the perforations communicates the inner surface and the outer surface of the cylindrical body and terminates with an air turbulator, being defined by a hemispherical cavity at the outer surface of the cylindrical body; and a plurality of dimples disposed on the outer surface of the other half of the cylindrical body, wherein each of the dimples is defined by a hemispherical cavity at the outer surface of the cylindrical body.

8. The fuel nozzle according to claim 7, wherein both the plurality of perforations and dimples are arranged in circular rows around the circumference of the cylindrical body.

9. The fuel nozzle according to claim 8, wherein the circular rows are further configured in staggered arrangement.

10. The fuel nozzle according to claim 7, wherein each of the perforations faces the downstream side of the fuel nozzle.

11. The fuel nozzle according to claim 10, wherein each of the dimples faces the upstream side of the fuel nozzle.

12. The fuel nozzle according to claim 7, further comprising a ferrule disposed around on one end portion of the cylindrical body.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated herein to illustrate embodiments of the invention. Along with the description, they also serve to explain the principle of the invention. In the drawings:

(2) FIGS. 1A and 1B present the isometric views of the fuel nozzle according to the preferred embodiment of the present invention.

(3) FIGS. 1C, 1D, and 1E present the section views of the fuel nozzle according to the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE VARIOUS EMBODIMENTS OF THE INVENTION

(4) Atomization is the process of breaking the fuel oil particles to extremely small droplets. Thus, atomization makes it easier to burn fuel in the combustion space. The more the droplets are broken, the better is the atomization. The quality of the atomized particles of fuel further helps the quality of combustion by contributing to the penetration process. Penetration is the distance travelled by the fuel particle inside the combustion chamber just before burning. The smaller the fuel particles in the atomization process, the lighter it is to be carried further by the air pressure to be burned properly away from the fuel nozzle. To improve the process, various embodiments of the present invention are presented.

(5) In a preferred embodiment of the present invention, FIG. 1A shows the fuel nozzle 100 for improving fuel atomization in a carburetor or a similar apparatus. The fuel nozzle 100, preferably, has a cylindrical body 102 with an outer surface 104 and an inner surface 106. The cylindrical body 102 is preferably made of gasoline and heat-resistant material. A plurality of perforations 108 is disposed through one half of the cylindrical body 102, while a plurality of dimples 110 is disposed on the outer surface 104 of the other half of the cylindrical body 102. The fuel nozzle 100 is further provided with a ferrule 112 disposed around on one end portion of the cylindrical body 102. The ferrule 112 serves as a means for installing or mounting the fuel nozzle 100, preferably detachable, in a carburetor or a similar apparatus. In one embodiment of the present invention, the fuel nozzle can be affixed in a carburetor. FIG. 1B shows a rotated, isometric view of the fuel nozzle 100 showing the plurality of dimples 110 disposed on the other half of the cylindrical body 102 and the plurality of perforations 108 protruding from the outer surface 104 through the inner surface 106.

(6) FIGS. 1C and 1D show the section views of the fuel nozzle 100 according to the preferred embodiment of the present invention. The fuel nozzle 100 further comprises a fuel tunnel 114 defined by an opening cutting through the length of and centrally located inside the cylindrical body 102. A plurality of perforations 108 and dimples 110 are disposed around the cylindrical body's one end portion opposite of the ferrule 112. As shown in FIG. 1C, each of the perforations 108 cuts through the outer surface 104 and inner surface 106 of the fuel nozzle 100. On the other hand, FIG. 1D shows each of the dimples 110 having a hemispherical cavity at the outer surface 104 of the other half of the cylindrical body 102.

(7) Referring to FIG. 1E, each of the perforations terminates at the outer surface with an air turbulator 116 being defined by a hemispherical cavity communicating to the fuel tunnel via a through-hole 118, preferably cylindrical in shape.

(8) In the preferred embodiment of the present invention, the perforations and dimples are configured to be arranged in circular rows around the circumference of the cylindrical body. More preferably, the circular rows are further configured in a staggered arrangement to ensure neighboring perforations and dimples are closest to each other when arranged in multiple rows.

(9) In some embodiments of the present invention, the diameter or the surface area of the hemispherical cavities of the dimples and perforations may differ from each other. For example, the surface area of the hemispherical cavities from the perforations may be larger than that of the dimples.

(10) During the combustion process, as air gas enters the air-fuel mixing chamber, the air that passes through the carburetor's venturi sucks fuel through the nozzle. Unlike a regular nozzle that usually has only one outlet where gasoline ejects to enter the air-fuel mixing chamber, the fuel nozzle of the present invention is provided with a plurality of dimples and a plurality of perforations, each of which is configured with an air turbulator. As air passes the surface of the nozzle's body, the air turbulators, in the form of hemispherical cavities, create a hump for air to attach to the surface causing turbulence that creates air vortices and delays the detachment of air within the turbulator. The turbulence reduces aerodynamic drag as fuel is being ejected through the perforations before each turbulator. This causes a more atomized fuel that joins air in the mixing chamber providing better combustion.

(11) The air turbulators defined by the hemispherical cavities on the fuel nozzle act as vortex generators, which create a thin turbulent boundary layer of air that clings to the fuel nozzle's surface. This allows the smoothly flowing air to follow the nozzle's outer surface a little farther around the back side of the nozzle (air hugging), where the multiple perforations that discharge liquid fuel are located. This air hugging results in a reduced wake region size, which helps optimize fuel atomization.