US1798461A

US1798461A - Carburetor

Info

Publication number: US1798461A
Application number: US229351A
Authority: US
Inventors: Jr Oscar Fauser
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-10-28
Filing date: 1927-10-28
Publication date: 1931-03-31
Anticipated expiration: 1948-03-31

Description

March 31, 1931. Q FAUSER JR 1,798,461

CARBURETOR Filed Oct. 28, 1927 2 Sheets-Sheet 2 s1 50 4 4, flgNXZiMiI/UE F I F512. I W W AT! CIENEYE Patented Mar. 31, 1931 UNITED STATES OSCAR FAUSER, JR., OF PEORIA, ILLINOIS onnnunn'ron Application filed October 28, 1927. Serial No. 229,351.

This invention relates to carburetors.

One of the objects of the invention is in the provision of a carburetor for internal combustion engines, said carburetor being provided with such structural arrangement between the float chamber and the intake as to insure a more efficient mixing of the gasoline and air prior to the entrance of said mixture to the intake.

Another object is in the provision of mechanism disposed between thefloat chamber and the intake, of a carburetor, such as will greatly increase the mixing of the gasoline and air, thereby permitting the intake to induce thereinto a drier and therefore more readily combustible fuel mixture, the result being to greatly increase the efficiency of the internal combustion engine to which the carburetor is attached.

Still another object is in the provision of a simple atomizing device, which is disposed in connection with the conventional intake of an internal combustion engine in a manner to supply thereinto a highly efficient, combustible mixture.

A further object is in the provision of a means for atomizing gasoline prior to its induction into the intake, said atomizing means comprising a spiral member for whirling the mixture of gas and air, the resulting spray being projected through ports in said chamher and finally into a substantially similar chamber in the intake, said chamber having a plurality of ports from which the spray is induced into a venturi disposed in the intake.

A still further object is in the provision of means for atomizing the fuel used in an internal combustion motor, said atomizing means comprising mechanism for whirling the gas and air in a chamber from which the resultant spray passes through a plurality of ports to the intake, there being provided a further re-atomizing chamber disposed in the venturi in the intake.

Other objects will appear in the following specification, taken in connection with the annexed drawings, in which- Fig. 1 is a plan view of the carburetor;

Fig. 2 is one end elevation thereof;

Fig. 3 is a side elevation of the same;

Fig. 4 is another end elevation of the carburetor;

Fig. 5 is a cross-sectional view, showing in detail the float chamber and the intake mechanism;

Fig. 6 is an enlarged detail, in section, showing a portion of the float mechanism;

Fig. 7 is a sectional view, taken on the line 77 of Fig. 6;

Fig. 8 is a vertical sectional View, showing in detail my special atomizing or vaporizing mechanism Fig. 9 is a further detail, in section, of my atomizing mechanism; and

Fig. 10 is a detail of the atomizing chamber disposed in the venturi located in the intake.

Before referring specifically to the drawings, it might be stated that the novelty in the structure disclosed herein lies particularly in the mechanism and manner of handling the gasoline, hereafter referred to as fuel, prior to its induction into the intake.

Carburetors are of such well known construction as is thought to obviate he necessity of describing the more general features in detail, and as a matter of fact, the novel features to be claimed herein, although shown in connection with a rather conventional carburetor structure, might well be used in any other type of carburetor or fuel mixing device.

As stated in the objects of the invention, applicant herein has provided mechanism for more thoroughly mixing the fuel and fuel prior to the projection of the atomized mixture into the intake of an internal combustion engine. Inasmuch as the present carburetor might be attached to any of the many types of internal combustion engines, such portion has not been shown.

Referring to the drawings, there is shown a conventional float chamber 10, having a drain plug 11 at its lower end, by which any collection of water or extraneous particles lodging in the float chamber may be extracted by removal of said plug. A cover 12 for the float chamber has an upwardly projecting portion 13, which forms a valve seat 14 interiorly thereof. A vertically slidable plunger carried in said portion 18 is capable of seated or unseated relationship with the seat 14 in a manner to permit passage of gasoline into the float chamber from a gasoline intalze pipe 16. Control of the plunger 15 is by a lever 17 pivoted, as at 18. A bracket 19, socured, as at 20, to the under side of the cover, controls the downward movement of lever 17. A conventional float chamber is shown at 21, the same having an upwardly projecting stem 22, which is adapted to contact the un der side of the lever 17 'ith the result that up and down movement of the float controls the entrance of gasoline into the float chamber.

As stated previously, the heretofore described mechanism is entirely conventional, so far as carbureting devices is concerned and merely describes one of the conventional manners of maintaining a supply of fuel in the carburoting device.

In the present device, an intake member of rather conventional form is shown at 23. Disposed in said intake a pivoted valve member 24, controlling the amount of air that may be induced therethrough. This valve is pivoted, as at 25, in the in ake, and is controlled by an exteriorly disposed lever 26, which in normal operation of an internal combustion engine is manually controlled by the operator to increase or decrease the speed of the engine.

There now follows a description of applicants atomizing mechanism, which. more of ficiently accomplishes the fuel mixture prior ed at 28 into an inwardly cast portion 29,

chamber will completely surround the lower 1 thereof, the exit of the completely atomized 9 of the drawings, the same tioned member 27 is a small plu 3d a -ertured,

member 27. A cover member 38 is threaced cover the opening for the gasoline and therementioned gasoline atomizing means.

member 27, the same being inserted as may manner to substantially engage the upper to its induction into the intake. This mechanism comprises a portion 27, whic i is thread which forms a part of the float chamber, it being apparent that the gasoline in the float end 30 of said member 27. This member 27 comprises an atom zmg chamber interiormixture from said chamber being through a plurality of apertures shown perhaps most clearly in F12. being designated 32. Threaded interiorly, as at 33, in the lower end of the before-menas at 35, to permit the entrance of gasohns from the float chamber into the inside of to the lower end of the member 27 in suc i manner that a screen portion 37 thereof wil.

fore prevent the entrance of dirt particles or other extraneous matter into the hereafter Still another and larger plug 38 has a threaded relationship. as at 39, with the be readily seen. from above. This plug 38 has its lower end 40 tapered at l1 in a end of the small plug 34. This plug 38 is apertured throughout, as may be clearly seen, said aperture being designated 42. A removable small plug 43 is inserted in the upper end of said plug 38, the same also being apertured to permit the entrance of air into the beforeanentioned opening 42. It is apparent from the above description that gasoline enters the smaller plug 34 and air enters the plug 38. the same meeting in the small open space between the tapered end of the plug 38 and the upper end of small plug 34:. This is the first mixture of the air and fuel, operation of the internal combustion inducing air through the opening 42 in the plug 38 and the upward flow of gasoline through the screen portion 37 and opening in the plug 34. The resulting mixture passes upwardly along the sides of the lower end of the member 38 until same reaches a spiral portion 44, the same forming a part of the plug 38. This spiral operates to whirl the before-mentioned mixture of gasoline and air and therefore more compl tely mix same. This whirling of the gasoline and air creates an atomized mixture of gasoline and air within the atomizing chamber 31, the same being formed between the member 27 and the plug 88. This atomizing chamber, as previously described, has a series of perforations, which permits the exit of the atomized fuel mixture through an outlet 45 and thence through a passageway 46 into a re-atomizing chamber, later to be described.

A conventional needle valve, shown at 4:7, has its pointed end 48 capable of projection between the

passageways

45 and 46 in a manner to control and vary the air and fuel mixture as may be desired. This needle valve is a conventional regulating member and has a threaded relationship, as at 49, with the carburetor feed portion 50. The outer end of the needle Valve has a manually controllable portion 51 and a spring tensioned frictionally engage-able member 52, which holds said needle valve in the set position. The fuel mixture passageway 46 carries the atomized fuel mixture into a specially formed venturi 53 which is secured within the intake by means of the set screw 5- This venturi has a re-atomizing chamber 55, into which the fuel mixture from the passageway 46 is projected. This atomizing chamber is formed substantially the same as the previously described atomizing chamber 31, inasmuch as same has a plurality of apertures at 56 which lead into the venturi. It is therefore found that the fuel mixture is not only initially atomized by means of the spiral portion but also there is a substantial re-atomizing of the fuel mixture in the second chamber the resulting mixture passing through apertures 56 into the intake.

Due to the disposal of the venturi within the intake, it is apparent that this fuel mixture is accelerated by the use of the venturi.

The fuel mixing arrangement, which has 110w been described, can be used only when the internal combustion engine has attained more than an idling speed; in other words, is used only when the valve 24 is opened in a manner to induce the flow of atomized fuel mixture into the venturi. In order to take care of an idling speed when the valve 24 is not opened, there is provided an additional passageway 57 from the needle valve chambar, the same leading to a plug 58 which is screw threaded, as at 59, in the intake at a point just above the valve 24. This plug forms a smaller atomizing chamber of sub stantially the same general formation as those previously described, in that the plug is apertured, as at 60, to permit the entrance of air internally thereof, the same passing through apertures 61 into a small chamber, as

62, just prior to the projection of the fuel mixture through the opening 63 which leads into the intake at a point above the valve 24.

It is apparent from the above description, that when the internal combustion engine is at an idling speed, the fuel mixture will be drawn from this chamber and that no fuel mixture will be projected from the chamber 55, the same forming a part of the venturi 53. However, at this time the initial fuel atomizing mechanism is in operation and is efficiently mixing the gasoline and air. When the mot-or attains more than an idling speed, the valve 24 opens and fuel is then induced from the atomizing chamber 55 in the venturi.

With respect to the operation of the carburetor, it is apparent that the gasoline and air are whirled by the spiral in a manner to atomize same, and that only a thoroughly atomizel mixture can pass through the plurality of apertures 32 in the first atomizing chamber. The control of the fluid mixture by the needle valve is conventional, but the formation of a second atomizing chamber in the venturi and the passage of the atomized mixture through a plurality of apertures in said venturi also permits an even distribution of fuel mixture into the intake, as well as a IIIlXbLlI'G which is completely broken up and in substantially dry condition, this formation of a dry fuel mixture being highly desirable, in many instances there being an attempt to obtain same by pre-heating or intake-heating devices, the same not being necessary with the present character of carbureting device.

In view of the above description, and due to he fact that internal combustion motors are of such conventional structure as to obviate the necessity of describin same, the present description is thought sufiicient as far as the operation of the carburetor is concerned.

W hat I claim is: 1. In a carburetor having a Venturi tube, an atomizing device comprising a removable plug having an atomizing chamber therein,

apertures in said chamber, a second plug within said first named plug and having a passageway therein, a second passageway between said plugs connected to said first named passageway and said chamber, a third passageway leading to the float chamber of the carburetor and connected to said first and secon d passageways, means in said second named passageway to whirl a mixture of fuel and air into said atomizing chamber and connections from said apertures to the Venturi tube of the carburetor.

2. An atomizer for a carburetor having a Vcnturi tube, comprising a passageway leading upward from the float chamber of the carburetor, a second passageway connected to said first named passageway and leading downward from the outside of the carburetor, a third passageway connected to both said first and second named passageways at the point of connection between them, said last named passageway encircling said second named passageway, a plug, a chamber therein connected to said last named passageway, a spiral member in said last named passageway to whirl a mixture of air and fuel into said last named chamber to at-omize the same, and connections from said last named chamber to the Venturi tube of the carburetor.

3. An atomizer for carburetors comprising a passageway leading upward from the float chamber of the carburetor, a second passageway connected to said first named passageway and leading downward from the outside of the carburetor, a third passageway connected to both said first and second named passageways at the point of connection between them, said last named passageway encircling said second named passageway, a plug, a chamber therein connected to said last named passageway, a spiral member in said last named passageway to whirl a mixture of air and fuel into said last named chamber to atomize the same.

t. In a carburetor having a Venturi tube, an atomizing device comprising a removable plug having an atomizing chamber therein, apertures in said chamber, a second plug within said first named plug and having a passageway therein, a second passageway be tween said plugs connected to said first named passageway and said chamber, a third passageway leading to the float chamber of the carburetor and connected to said first and second passageways, means in said second named passageway to whirl a mixture of fuel and air into said atomizing chamber, connections from said apertures to the Venturi tube of the carburetor, and a screen member positioned on the end of the first named plug across the passageway leading to the float chamber of the carburetor.

In testimony whereof, I have hereunto affixed my signature.

OSCAR FAUSER, JR.