US3648988A

US3648988A - Carbureting device

Info

Publication number: US3648988A
Application number: US52268A
Authority: US
Inventors: Oliver D Dibert
Original assignee: Individual
Current assignee: Individual
Priority date: 1970-07-06
Filing date: 1970-07-06
Publication date: 1972-03-14
Anticipated expiration: 1989-03-14

Abstract

A double venturi device for supplying petrol to the throat of a carburetor for efficiently causing the petrol to vaporize. A portion of the petrol entering the double venturi passes through an inner venturi, while the remainder flows through a passageway between an inner and outer venturi.

Description

[ 5] Mar. 14,1972

United States Patent Dibert [54] CARBURETING DEVICE 3,472,495 10/1969 Marsee et al.......... ..........26l/DlG. 39

FOREIGN PATENTS OR APPLICATIONS [72] Inventor: Oliver 1). Dibert, 5 Woodmont Circle,

Greenville, SC. 29605 July 6, 1970 [21] Appl.No.: 52,268

558,291 12/1943 Great Britain.......................26lI78R [22] Filed:

Primary ExaminerTim R. Miles Attorney-Bailey and Dority [57] ABSTRACT A double venturi device for supplying petrol to the throat of a carburetor for efficiently causing the petrol to vaporize. A

Field oiSearch n .l. 1] l. 5 II.

[52] U.S. Cl.

References Cited portion of the petrol entering the double venturi passes while the remainder flows through a m mm v w r F e t u m o i W m m m D n 3 fmm w em C e 7 w ma .m mm w meme a r ..P R H8 1 m :0 "2 E T mm A "m P m B mm T W n no t S mm BS m 76 11 600 62 ll 9 36 3 PATENTEUMAR 14 I972 INVENTOR.

OLIVER DzDlBERT ATTORNEY ,ample of such devices are illustrated in US. Pat. No.

1,631,716 granted to Braverey on June 7, 1927, andPat. No. 1,384,429 granted to Cole on July 12, 1921. The main purpose of using venturies in carburetors is for dispersing the ,gasoline in the air stream flowing through the carburetor in order to provide vaporization of the gasoline. When the gasoline is not properly vaporized in the air such decreases the efficiency ofthe engine upon which the carburetor. is being used. It also causes polution of the air by emitting from the engine an exhaust which contains an incompletely burned-mixture.

In recent years due to the heavy concentration of automobiles and other vehicles within certain metropolitan areas'the efficiency of the burning of the fuel within enginesproduces polution of the air which, in turn, is a health hazard, as well as irritates the eyes and contaminates the surrounding environment.

It has been found that by increasing-the temperature differential between the air flowing through the throat ofthe carburetor and the petrol being mixed therewith, such increases the vaporization of the fuel, increasing the efficiency of the combustion within the engine. This not only eliminates .the polution as a result of having a cleaner burn within the engine but increases the efficiency of the engine. When such is used on an internal combustion engine of an automobile the mileage of the automobile is also increased.

Accordingly, it is an important object of the present invention to provide a device for use with a carburetor of an engine which increases the temperature differential of the fuel being dispersed in the throat of the carburetor and the air flowing therethrough.

Another important object of the present invention is to-provide a device for a carburetor which increases the vaporization of the petrol being used therewith.

Still another important object of the present invention is to provide a device which includes a double ,venturi whereinthe petrol flowing through an inner venturi causes the main body of the inner venturi to be cooled, which in turn, cools the portion of the petrol flowing over the outer wall of the main body.

Still another important object of the present invention is to provide a simple and inexpensive device which may be readily mounted within the throat of the carburetor to increase the efficiency of an engine.

The construction designed to carry out the invention will be hereinafter described, together with other features thereof.

The invention will be more readily understood from a reading of the following specification, and by reference to the, ac

companying drawing forming a part thereof wherein an ,example of the invention is shown and wherein:

FIG. 1 is a side'elevational view with partsshown schematically, of a carburetor including a fuel dispersing apparatus constructed in accordance with the present invention,

FIG. 2 is an enlarged exploded view showing the various components of the fuel dispersion apparatus, and

FIG. 3 is an enlarged vertical sectional view of the ,fuel dispersion device constructed in accordance with the present invention.

Referring in more detail to the drawing, FIG. 1 illustrates a conventional carburetor having a carbureting chamber, ,an air inlet B and a mixture outlet C. A conventional throttle valve is carried in the mixture outlet for controlling the flow of the mixture from thecarburetor. A supply of petrol is provided for being mixed with a stream of air which flows in the air inlet B and out the mixture outlet C. A first venturiD is carried in a carbureting chamber A and has an elongated cylindrical main body portion with an inner wall and an outer wall. The first venturi D has an inlet end and an outlet end. A plurality of circumferentially spaced-nozzles are carried adjacent the inlet end of-the first venturi D.'A.second venturi is-provide having an elongated cylindrical main body portion which is slightly larger than the main body portion of thelirst venturi D. The first venturi D is carried in the second venturi, producing a passageway F-between the main body of the first and second venturies D and E. The second venturi also has an inlet end and an outlet end. Means is provided for supplying petrol to the venturies from the supply of petrol, allowing a portion of the petrol to flow through the nozzles in thefirst venturi, and a portion to flow through the passageway. F between the first and secondventuries D and E, respectively. An insulating cover is carried on the second venturiforaiding in maintaining the temperature differential ;between the air flowing through the carburetor and the main-bodies of the venturies. Such increases the vaporization of thepetrol.

The carbureting chamber A is a conventional carbureting chamber havingan. air inletB and amixture outlet C.'The air entering'the carburetor first passes-through a'filterlfl, only a portion of such is shown, down through the air inletB past a conventional choke 11 which isfishown-in the open position through the main passage ofthethroat of .the carburetor, and out the mixture outlet G-Positioned-within the mixture outlet C is a conventionalthrottle valve 12.- The main passageway of the carburetor, which-.isv defined bythe .wall 13, has a restricted portion '14 defining a venturi therein, which produces the highest velocity of theflow. of air through the carburetor. 3

A reservoir 15 is providedin'the housing of the carburetor formaintaining a supply of petrol, su'chas gasoline. The level of the petrol within the reservoir is maintained-by a float operated valve l6..The gasoline flows outtofthe reservoir 15 through a passageway 17 .which is normally providedwith a metering valve, but is not shown herein,- into a vertical chamber 18. A meteringjet 19 is carried..within,thechamber 18 for controlling the flow of gasoline from the reservoir. 15 to the downwardly extending passageway-20 extending through an arm 21. A-conventional =fuel regulating screw 22 is provided for-regulating the fuel being supplied to thecarburetor chamber during idling.= The structurezdescribed above is conventional and is merely set forth to show one environmentin whichthe petroldiffusing device, whichincludesthe-firstand second venturies D and E, respectively, is utilized. It isunderstood, of course, that various'types of-carburetors can be equipped. with the petrol diffusingdevice constructed in-accordancewith the present invention.

The first venturi D has a main bodyflwhich .includes a cylindrical portion 22 of a uniform diameter which is integralwith first venturiDfor allowingpassageofpetrolintothe first .ven-

turi. A- dividerring 27 extends outwardly-:fromthc cylindrical portion. 22, and providesaseal. with :the-inner wall of the second venturi. A groove isdefinedbetween the dividerring 27- and the shoulder ,24, so =thatythepetrol can .pass therethrough into the nozzles 26.

The second venturi has an-inner=diameter slightly larger than the outerv diameter of thefirst .vehturi D. and is complementary in shapes therewith; The second venturi E has a cylindrical portion 28 which is uniform'indiameter and is in a pressurefitting'relationship with the shoulder .24 and" dividerring 27 carried. on the first venturi D. Integral with the lower end of the cylindrical portion '28. is. a frustoconicalkshaped member 29,- which terminates uabove the end of -the; frustoconical shaped member. 23 forming a part, of the'main body of the. first as to pass through the nozzles 26, as well as into the passageway F extending between the main body of the first venturi D and the main body of the second venturi E.

As the gasoline passes through the nozzles 26 into the first venturi it comes in contact with air flowing through the carburetor into an inlet end 31a of the first venturi. This causes the gasoline to vaporize. Such action cools the wall of the first venturi D causing the gasoline flowing through the passageway F between the first and second venturi D and E, respectively, to be cooled. This produces a temperature differential which aids in the vaporization.

An insulating cover 31 encompasses the second venturi E and has an inner diameter slightly larger than the outer diameter of the second venturi E so as to define an air gap 32 between the second venturi and the insulating member 31. The insulating member 31 has a cylindrical portion 33 of a uniform diameter and a frustoconical shaped portion 34, which tapers outwardly from the cylindrical portion 33. A plurality of passageways 35 extend through the cylindrical portion 33 of the insulating member 31 and the cylindrical portion 28 of the second venturi for allowing air to flow into the passageway F. Such enables the gasoline flowing into the passageway F through the passageway to vaporize while in the passageway. As the mixture reaches the end of the passageway F such engages fresh air flowing through the throat of the carburetor and vaporizes further. The reason that the length of the main body of the second venturi is less than the length of the main body of the first venturi is to allow the mixture flowing out of the passageway F to strike fresh air as it exits therefrom.

The passageway 35 is defined by holes 36 carried in the insulating member 31 in alignment with holes 37 carried in the second venturi E.

[t is noted that the tubular member 21 terminates in a cylindrical ring shaped member 38 into which the first and second venturies are press fit. The insulating member 31 is press fit onto the second venturi E. The first and second venturi and the insulating member 31 may be constructed of any suitable material, and in one particular embodiment is constructed of brass. The main criteria is to use a material of high heat conduction properties so that as the gasoline flows through the passageway F over the main body of the first venturi, such cools the gasoline. This, in turn, increases the temperature differential between the gasoline and the air flowing through the carburetor aiding in the vaporization of the gasoline. As the efficiency of the vaporization of the gasoline increases such increases the efficiency of the burning of the mixture within the engine upon which the carburetor is utilized. This, in turn, minimizes the pollution generated by the engine during its operation, and when installed on an automobile increases the mileage per gallon of fuel.

While a second venturi E has been utilized to define the passageway F, it is to be understood that the passageway can be defined by other suitable means for encompassing the first venturi D as long as the fuel flowing through the passageway is in heat transfer relationship with the wall of said first venturi D.

While a preferred embodiment of the invention has been described using specific terms, such description is for illustrative purposes only, and it is to be understood that changes and variations may be made without departing from the spirit or scope of the following claims.

What is claimed is:

1. In a carburetor, a carbureting chamber having an air inlet and a mixture outlet, a supply of petrol, a stream of air flowing in said air inlet to be mixed with said petrol and exiting through said mixture outlet, the improvement including: a first venturi carried in said carbureting chamber having an elongated cylindrical main body portion with an inner wall and an outer wall, said first venturi having an inlet end and an outlet end, a plurality of circumferentially spaced nozzles carried adjacent said inlet end of said first venturi, a second venturi havin an elon ated c lindrical main body rtion sli tl lar er th n the m5 body portion of said first i' nturi, sal d irst vgnturi being carried in said second venturi defining a passageway between the main bodies of said first and second venturies, said second venturi having an inlet end and an outlet end, means for supplying petrol to said venturies from said supply of petrol allowing a portion of said petrol to flow through said nozzles in said first venturi, and a portion to flow through said passageway between said first and second venturies, whereby the vaporization of said gasoline by said air passing through said carburetor is increased.

2. The carburetor as set forth in claim 1, wherein said outlet end of said first venturi extends outwardly beyond said outlet end of said second venturi whereby petrol leaving said passageway meets with fresh air flowing through said carburetor for increasing the vaporization of said petrol.

3. In a carburetor, a carbureting chamber having an air inlet and a mixture outlet, a stream of air flowing through said carburetor, a supply of petrol, the improvement comprising: a first venturi carried in said carbureting chamber having an elongated main body portion, said first venturi having an inlet and an outlet end, a second venturi having an elongated main body portion slightly larger than the main body portion of said first venturi, said first venturi being carried in said second venturi defining a passageway between said main bodies of said first and second venturies, means for supplying petrol to said venturies from said supply of petrol allowing a portion of said petrol to flow into said first venturi for mixing with air flowing through said first venturi and allowing a portion of said petrol to flow into said passageway between said first and second venturies in contact with said main body of said first venturi, whereby said petrol flowing through said passageway is cooled increasing the temperature differential between said air flowing through said carburetor and said gasoline.

4. The carburetor as set forth in claim 3, wherein said first venturi has a plurality of circumferentially spaced nozzles carried adjacent said inlet end, and wherein said means for supplying petrol includes a divider ring carried on said first venturi adjacent said plurality of circumferentially spaced nozzles for directing said petrol into said first venturi and said passageway.

5. The carburetor as set forth in claim 3, further comprising an insulating cover carried on said second venturi for aiding in maintaining said temperature differential between the air flowing through said carburetor and the main bodies of said venturies.

6. The carburetor as set forth in claim 3, further comprising a passageway extending through said main body of said second venturi for allowing air flowing through said carburetor to pass therethrough in order to aid in vaporizing the petrol passing through said passageway.

7. in a carburetor, a carbureting chamber having an air inlet and a mixture outlet, a stream of air flowing through said carburetor, a supply of petrol, the improvement comprising: a venturi carried in said carbureting chamber having an elongated main body portion, said venturi having an inlet end and an outlet end, means encompassing said main body of said venturi defining a passageway between said main body of said venturi and said means encompassing said main body, means for supplying petrol to said venturi from said supply of petrol for mixing with said air flowing through said venturi and supplying petrol to said passageway in contact with said main body of said venturi for cooling said petrol flowing through said passageway, whereby as said petrol flowing through said passageway is cooled the temperature differential between said air flowing through said carburetor and said petrol is increased.

Claims

1. In a carburetor, a carbureting chamber having an air inlet and a mixture outlet, a supply of petrol, a stream of air flowing in said air inlet to be mixed with said petrol and exiting through said mixture outlet, the improvement including: a first venturi carried in said carbureting chamber having an elongated cylindrical main body portion with an inner wall and an outer wall, said first venturi having an inlet end and an outlet end, a plurality of circumferentially spaced nozzles carried adjacent said inlet end of said first venturi, a second venturi having an elongated cylindrical main body portion slightly larger than the main body portion of said first venturi, said first venturi being carried in said second venturi defining a passageway between the main bodies of said first and second venturies, said second venturi having an inlet end and an outlet end, means for supplying petrol to said venturies from said supply of petrol allowing a portion of said petrol to flow through said nozzles in said first venturi, and a portion to flow through said passageway between said first and second venturies, whereby the vaporization of said gasoline by said air passing through said carburetor is increased.