US2632636A - Carburetor - Google Patents

Description

March 24, 1953 .A. H. CARSON CARBURETOR Filed April 19, 1951 ISnnentor, ,QSO/Y Gttorneg Patented Mar. 24, 1953 UNITED STATES PATENT OFFICE i CARBURETOR Andrew H. Carson, Los Angeles, Calif.

Application April 19, 1951, Serial No. 221,826

Claims. (Cl. 26h-41) The present invention relates to carburetors within the carburetor. The present invention dispenses with the use of such a iioat and is so `constructed and arranged as to properly meter the iiow of gasoline and regardless of inclination to horizontal assumed by the carburetor.l

The invention incorporates many novel fea` tures of construction1 which reduce the numberof working parts, renders the carburetor substantially fool-proof in operation, is capable of functioning efficiently at different motor speeds, and

which maintains Icorrect air to fuel ratio for all l engine speeds.

`The inventor has found, in actual practice, that the carburetor of the present invention is easily adjusted for different piston displacement so that the carburetor Works for all motor speeds without any .flat spots. ther fo-und that the carburetor conserves fuel and is economi-cal to operate, in that it is saving in its use of gasoline, or other combustible fuel.

Other objects include a carburetor which is superior to carburetors now known to the inventor, economical in cost of manufacture, and easily installed.

With the above mentioned and other objects in view, the invention consists in the novel and useful provision, formation, construction, association, and relative arrangement of parts, members and features, all as shown in a certain embodiment in the accompanying drawing, described generally, and more particularly pointed out in the claims. In the drawing:

Figure 1 is a fragmentary, partially sectional side Ielevation of the carburetor shown attached scale, taken on the line 3-3 of Figure 2.

Referring lnow with particularity to the drawing, the improved carburetor includes a carburetor casing I, which is open at its top 2, to provide an air intake, the opposite end of said casing being secured to member 3, which member isv of reduced internal diameter from the internal diameter of the casing I, and provides a fuel passageway at 4 and an emulsified fuel outlet at 5. f The upper end of memberv 3 is flanged at VIi for "reception within, the 4lower end of Acasing I, ,and

The inventor has fursecured thereto by means 1, such as screws. The intake throat lIl may be beveled as shown, or said. member 3 may be in the form of a Venturi tube. However, in the present instance, the internal diameter of said member 3 is uniform, with the exception of the throat 8. Member 3 is provided with -diametrically disposed hubs 9 and III, for purposes hereinafter designated, and the lower end of member 3 vis flanged at II for connection with the intake manifold I2, shown in fragment, of an internal combustion engine.

Within the casing I is a metering valve means which includes a tube or casing I3, threaded at its upper end to a gland nut I4, the nut having an enlarged bore at I5 to receive packing held in place by a nut I6. The opposite end of said tube I3 is threaded to a plug Il, provided with metering ports. In particular, plug I'I is formed with an axial bore I8, which communicates with a counterbore I9. Two eccentric bores 20 and 2l extend from the top of the plug longitudinally thereof, with small ports of different diameters spaced between the bores I8 and 20, and I8 and 2l, respectively, as shown at 22 and 23. It will be observed that ports 22 and 23 are in staggered relationship. In other words, the lowermost port of the type 22 is staggered with relation to the lowermost port 23, and so on. Furthermore, as stated, the lowermost port 22 is of smaller diameter than the next ascending port 22, and the same is true for the ports 23. The ports of the type shown at 22 and 23 gradually increase in diameter from the lowermost port to the topmost port.

Adapted to extend longitudinally of the tubing I3 is a, valve stem 24', which stem is received in the bore I8 and extends centrally of the gland nut I4 passing through packing I5, the packing nut IB, and outwardly beyond said nut.

A tube 25 has one end thereof received within the counterbore I9 and held to the plug I'l in any convenient manner, such as by brazing, welding, or otherwise, the said tube being bent so as to have the outlet orifice 26 positioned on the axis of member 3. The tube 25 carries a conical member 2l, the apex of the cone being adjacent the orice 26, the said cone being supported by said tube 25 by means of a connecting strip 28.

Below the cone 21 is a throttle valve 29, compristened one end of a link 32, the opposite end of thelink being secured to a rod 33 passed through external guides 34 and 35 mounted on the casing I, there being a connecting piece 36 adjustably secured between the rod 33 and the stem 24. The opposite end of the shaft 30 carries an arm 3l, to which is connected a link 38, which link is controlled as to movement to in turn move the arm 3l by the usual foot controlled lever or hand lever usually mounted adjacent the steering wheel of the vehicle.

The tubing I3 is externally provided with enlargements 39 yand 40, the said enlargements being provided with reduced diameter and screwthreaded portions 4I and 42, which threaded portions are passed through openings in the side wall of the casing I, and to which nuts 43 and 44 are threaded. The enlargements are formed with central ports or bores 45 and 46. A `pipe or tubing 41 is secured by the nut 43, to the end that said tubing has communication with the bore 45, the tubing leading to a fuel pressure pump (not shown), for supplying fuel. under pressure, to ll the well or space 48, which is included between nut I4, plug Il, and the interior of the tube I3, as Well as lling the ports 20, 2| and the connecting ports .22 and 23. The nut 44 secures a tubing 49, which tubing leads to a needle valve 50 communicating with the interior of member 3 below the throttle valve 29. The upper end of tubing 49 is 1n communication with the port or bore 45, and is the well or space 48 continuously filled with gasoline. When the throttle is operated from the substantially horizontal position shown in Figure 2, to raise rod 33, the stem 24 is elevated so that any gasoline Within ports 2B and 2i will be ready to flow from the lowermost ports 22 Aand 23 into the central port 0r bore I8 b6- neath the end of said stem and thence into tube 25 vfor deposit on the outer surface 0f cone 2l. Suction which exists in the engine draws air through the casing and through member 3 to pick up the gasoline on the cone and admix or f emulsify the same for delivery through the intake manifold to selected cylinders of the engine. Thus, as the stem 24 is raised, more and more of the staggered arranged ports 22 and 23 are uncovered to allow more gasoline to pass through tube 25 for deposit on the surface of lthe cone 21. The size of the ports 2B and 2i With relation to the ports 22 and 23 is such as to provide an increasing amount of gasoline ow into the tube 25. This, of course, is necessary for obvious reasons.

In view of the fact that the pump pressure maintains the well or space 48 constantly filled with gasoline, it is evident that the carburetor will deposit gasoline onto the surface of the cone A21, regardless of the inclination f the axis of the carburetor to the horizontal. In other words, the liquid under pressure is forced through ports 2|) and 2l, and the transverse ports 22 and 23 at all times during pump operation and operation of the motor. It is be- 'cause of the existence of the well or space 44 that a float bowl with a oat therein is rendered unnecessary.

It is obvious that various changes may be made in the relationship of the various elements entering into the invention, the drawing being illustrative of one embodiment.

I claim:

l. In a carburetor, a fuel metering device comprising a casing closed .at one end, a metering 'valve body in `the opposite end ofthe casing, the space included between the metermer valve body and said closed end forming a well adapted to receive a combustible fuel, said metering valve body provided with an axial bore, a valve stem movable within the said axial bore, a series of transverse ports communicating with the axial bore and with the well, any combustible fuel in said well passing sequentially through the transverse ports and into the axial bore .consequent upon opening said ports by movement of the said valve stem in one direction.

2. A carburetor casing open at both ends, one Vend providing an air intake portion, and the opposite end for attachment to the intake manifold of an internal combustion engine, and a throttle valve controlling passage of air through the 'carburetor casing, the combinati-on therewith of: a metering valve means for combustible fuel positioned within the carburetor casing between the air intake and the throttle valve; said metering valve means including a valve casina", a 'valve body secured to the valve casing at one end thereof, a gland nut at the opposite end of the valve casing, the space included between said gland nut and said valve body providing a well for combustible fuel, said gland nut and said valve casing each provided with an axial bore and a stem extending through the valve casing the said axial bores of the gland nut and valve body; said valve body provided with a pair of spaced parallel longitudinally extending eccentric bores, and said valve body provided with spaced transverse ports extending between said 4eccentric bores and the axial bore thereof, the eccentric bores adapted to receive fuel from the well for passage into the transverse ports when the stem is raised to uncover said ports and permit the combustible fuel to flow into the axial bore of said valve body.

3. A carburetor casing open at both ends, one end providing an air intake portion, and the V'opposite end for attachment to the intake manifold of an internal combustion engine, and a throttle valve controlling passage of air through vthe carburetor casing, the combination therewith of: a metering valve means for combustible fuel positioned within the carburetor casing between the air intake and the throttle valve; said metering valve means including a valve casing, a valve body secured to the valve casing at one end thereof, a gland nut at the opposite end of the valve casing, the space included between said gland nut and said valve body providing a well for combustible fuel, said gland nut and said valve casing each provided with an axial bore and a stem extending through the valve casing and said axial bores of the eters, raising the stern progressively uncoveringports of larger diameter.

4. A carburetor casing open at both ends, one

` end providing an air intake portion, and the opposite end for attachment to the intake manifold o1 an internal combustion engine, and a throttle valve controlling passage of air through the carburetor casing, the combination therewith of: a metering valve means for combustible fuel positioned within the carburetor casing between the air intake and the throttle valve; said metering valve means including a valve casing, a valve body secured to the valve casing at one end thereof, a gland nut at the opposite end of the valve casing, the space included between said gland nut and said valve body rroviding a well for combustible fuel, said. giand nut and said valve casing each provided with an axial bore and a stem extending through the valve casing and said axial bores of the gland nut and the valve body; said valve body provided with a pair of spaced parallel longitudinally extending eccentric bores, and said valve body provided with spaced transverse ports extending between said eccentric bores and the axial bore thereof, the eccentric bores adapted to receive fuel from the well for passage into the transverse ports when the stem is raised to uncover said ports and permit the combustible fuel to flow into the axial bore of said valve body, a tube in communication with the axial bore in said valve body for conducting combustible fuel therefrom, and an ilnperforate conical member, having its apex centered with respect to the outlet end of said tube for passing Y fuel positioned within the carburetor casing between the air intake and the throttle valve; said metering valve means including a valve casing, a valve body secured to the valve casing at one end thereof, a gland nut at the opposite end of the valve casing, the space included between said gland nut and said valve bodyr providing a Well for combustible fuel, said gland nut and said valve casing each provided with an axial bore and a stem extending through the valve casing and said axial bores of the gland nut and valve body; said valve body provided with a pair of spaced parallel longitudinally extending eccentric bores, and said valve body provided with spaced transverse ports extending between said eccentric boresfk and the axial bore thereof, the eccentric bores adapted to receive fuel from the well for passage into the transverse ports when the stem is raised to uncover said ports and permit the combustible fuel to fiow into the axial bore of said valve body; a tube in communication with the axial bore in said valve body for conducting combustible fuel therefrom; an iinperforate conical member positioned on one side of the throttle valve and having its apex centered with respect to the outlet end of said tube for passing combustible fuel over the surface thereof, and a valved connection between the Well of the metering valve means and the carburetor casing on the opposite side of said throttle valve.

ANDREW H. CARSON.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,220,965 Duvall Mar. 27, 1917 1,376,156 Murphy Apr. 26, 1921 1,606,491 Abernethy et al Nov. 9, 1926 1,929,234 Anderson Oct. 3, 1933 2,102,504 Beardsley et al. Dec. 14, 1937 2,198,676 Mallory Apr. 30, 1940 2.576,196 Stanalis Nov. 27, 1951

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