US1225398A - Carbureter. - Google Patents

Description

R. B. BENIAMIN.

C'ARBURETER. APPLICATION FlLED AUG.5. 1914.

Eateted May 8, 191?.

naar

vra. i, nnunnn n. retransmit, or cnrcaeo, ILLINOIS, AssIenon ro y:unan-renna ELECTRIG MANUFACTURING contraria, or cnicas-o, ILLInoIs, s ooaronarron or ILLINOIS.

' caanunnrnn.

Patented May 8, 1931*?. Application lled August 5, 1914. Serial No. 855,196.

1225,39@ Specification of Letters Patent.

To all whom t may concern VBe it known that l, REUBEN B. BENJA- MIN, a citizen of the United States, residing at Chicago, inthe county of Cook and State of illinois, have invented new and useful Improvements in Carbureters, lof which the following is a full, clear concise, and exact description, reference being hadA t0 the accompanying drawing, forming a part of this specification.

My invention relates to carbureters for internal combustion engines.

It is one of the objects of my invention to provide a carbureter in which delivery of the fuel to-the mixing. chamber in globules is avoided.

Further objects of my invention are to provide a carbureter in which undue wear in the moving parts is eliminated; to provide a carbureter that is readily adjustable; and to provide a carbureter that is economical to manufacture and efficient in its operation.

Additional objects and advantages of my invention will be apparent from the following description taken in connection with the appended claims.

` ln the following specifications and ac' companying drawings l have described and illustrated a carburetor constructed in aocordance with my invention, but it is to be clearly understood that numerous changes may be made in the form, construction and arrangement of the parts without departing from the spirit of my invention or eX- ceeding the scope of the appended claims, the forms of the invention herein disclosed being merely preferred embodiments thereof.

In the drawings:

Figure 1 is a vertical cross-sectional view of a lcarbureter constructed in accordancewith my invention.

Fig. 2 isai/ertical cross-sectional view of a modified form of my device.

. Fig. .3 is a top view of the rotor.

Fig. 4 is a section cnthe line 4-.-4, Fig. 1; and

Fig. 5 is a section on the line 5 5, Fig. 2.

Referring now to the modification of Fig. 1:

The carburetor has which is a floating member 7, carried by an arm 8 pivoted to the casing as at 9 and embracing a needle valve 10, which regulates a fuel chamber 6, in

the admission of the fuel from the tank to retain the same at a substantially constant level. inthe center of the fuel chamber the casing forms an air passage 11, which c0m` municates with a main air intake port 12. This air passage" is slighly contracted at the top to provide a valve seat portion 12a. The fuel valve 13, rotor 14, and sleeve 15 are suitably mounted on a stem 16.

rEhe valve 13 and stem 16 are secured to member 14 to rotate therewith,` the valve having a fuel-spreading portion 13a, tapering outwardly and away from the fuel outlet port 13".

The sleeve 15, in which the stem 16 rotates, is engaged by a lever 17 having a fulcrum on the casing as at 18 and pivoted to a rod 19.

The opening of the valve 13 is opposed by a coil spring 20, encircling the rod 19, which spring can be adjusted by means of the nut 21 to give the proper resistance.

The rod 19 is connected in a suitable manner with the accelerator, and it will be apparent thatits depression will cause an increased displacement of the valve.

To prevent injury to the lever 17 by an undue pressure on the rod 19, the displacement of the latter is limited by a stop 22,

comprising ascrew 22a which can be removed to allow the fuel chamber to be drained when desired. The fuel ows from the'supply chamber through the passage 23 to the outlet port 13b. A lubricating passage 24 leadsto the lower end of the stem 16.

The pipe 25- leadingy to the intake manifold is provided with a butterflyA valve 26. The valve 13 is rotated by means of the ro tor 14, which comprises a disk mounted at the top of the valve and` having blades 27 struck up therefrom. rIhe air passing up through the passage 11 strikes these blades, causing the rotation of the member 14 and the valve 13 secured thereto.

The rotor 14 has a down-turned fiange 14a, which rotates in an annular channel 28, the purpose of this constructionbeing to prevent the aid from dowing 'around they edges of the rotor and to direct it through the o enin s blades g The valve 13 has secured thereto by'means of arms 29 a tubular air-directing member 30 for causing the air to flow in'a thin sheet over the Surface 0f the @1m 0f fuel Q11 the 14b thereinl against the fuel-spreading portion 13a to insure a thorough mixing of the air and fuel. The lupper edge of the memberl 30 acts as an auxiliary air valve coperating with a valve 5 seat portion 12a.

In operation the vacuum produced by the engine causes the valve 13 to lift against the resistance of the spring 20, opening the port 13b to allow the passage of the fuel. A t the same time the vacuum produced by the engine causes air to be drawn through the annular passage between the valve 13 and the air directing member 30 and through the openings 141 in the rotor 14 causing the 15 latter and with it the valve 13 to rotate. The rotation of the valve and the shape of the portion 13 cause the fuel to be spread in a thin film over the surface of the valve. As the air is directed in a thin sheet over the surface of the film of fuel the air and fuel are thoroughly mixed.I

As the member 30 is lifted because of the vacuum due to the operation of the engine an auxiliary air passage is opened between the upper edge 31. of the member 30 and lthe valve seat portion 12a, said opening varying with the amount of lift, the air opening thus being proportionalto the fuel opening and the opening of both proportional to the degree of vacuum produced by the engine.

In the modification of Fig. 2 a conical airdirecting member 32 is secured to the valve 13 by means of arms 33. The lower edge 32a 35i'of the member 32 acts as an auxiliary air valve coperating with-the valve seat p0rtiom34. In operation the vacuum produced by the engine causes the valve 13 to be lifted and rotated, causing the fuel to be spread in ,'40`a thin film over the surface of the valve. Attheame time air is drawn through the annular passage between the Valve 13 and the air-directing member 32, the air being thusdirectedin a thin sheet over the film of fuel, causing a thorough mixture. As the member 32 is lifted, an auxiliary air passage isiopened between the lower endge 32a of the member 32 and the valve-seat portion `34, said opening varying with the amount of 5o lift.

It is to be noted that in both modifications,'the fuel. the air admitted through the primary air passage between the air-directing member 32 andthe valve 13, and the air 455 directed through the auxiliary air` passage, *must all pass between the edge of the larger end of the valve 13 and the valve seat or throttle portion 12a.` Because of the comparatively large circumference of the valve 13, the distance between the upper edge of this valve and the inner edge of the valve seat or throat portion 12a may be comparatively small, causing the fuel and the air admitted through both the primary and the auxiliary air passages to fiow through a supply, comprising a conical rotating niember, means forcausing the fuel to flowhi'n a thin film over the surface Vof said member toward its larger end, and means movable with said rotating member for causing the air to flow in a' thin sheet over said film.

2. In a carbureter, the combination with a fuel supply and an air supply, of means for controlling the flow of fuel from said supply, comprising la rotatable tapering' member, means for causing the fuel to flow in a'thin film over the surface of said member toward its larger end, and tubular means carried by said rotatable tapering member and substantially coaxial therewith, for causing the air to flow in a thin sheet over said fihn.

3. In a carbureter, the combination with a fuel supply and an air supply, of means for controlling the flow of fuel from said supply7 comprising a tapering member, means for causing the fuel to flow in a thin film over the surface of said member toward its larger end, and movable means surrounding said tapering member and adjacent thereto for causing the air to flow in a thin sheet over said film and for controlling the admission of an additional supply of air to the fuel.

4. In a carbure-ter, the combination with a fuel supply and an air supply of means for controlling the flow of fuel from said supply, comprising a tapering member, means for causing the fuel to flow in a thin film over the surface-'Gf` said member toward its larger end, and tubular means carried by said tapering member and substantially coaxial therewith, for causing the air to flow in a thin sheet over said film and for admitting an additional supply of airto said fuel.

5. In a carbureter, the combination with a fuel supply and an air supply, of a fuel outlet port, a member comprising a needle valve portion controlling said port, and a portion tapering outwardly away from said port and a movable tubular member surrounding said first member and adjacent thereto, for causing the air to fiow in a thin sheet over the surface of said tapering part, said tubular member also comprising valve means for controlling the admission of an additional supply of air.

naeaeee 6. ln a carbureter, the combination'with a fuel supply and an air supply, of a fuel outlet port, a member comprising a needle valve portion controlling said port, and a portion tapering outwardly away from said port and a tubular membersurrounding said rst member and adjacent thereto, for causing the air to flow in a thin sheet over the surface of lsaid tapering part, said tubular member' also comprising valve means for controlling the admission of an additional supply of air, said tubular member being carried by said rst member.

7. ln a carbureter, the combination with a fuel supply and an air supply, of a fuel outlet port, a member comprising a needle valve portion controlling said port, and a portion tapering outwardly away from said port, and a tubular member surrounding said lirst member and adjacent thereto, for causing the air to iiow in a thin sheet over the surface ofsaid tapering part, said tubular member also comprising valve means for l controlling the admission of an additional supply of air, said tubular member being carried by said first member, said valve member opening in the direction of flow of the air, and spring means resisting the opening of said valve,

8. ln a carbureter, the combination with a fuel supply and an air supply, of a fuel outlet port, a member comprising a needle valve portion controlling said port and a portion tapering outwardly away from said port, a tubular member surrounding said first member and adjacent thereto, for causing the air to flow in a thin sheet over the surface of said tapering part, and means for rotating said first member.

9. ln a carbureter, the combination with a fuel supply and an air supply, of means for controlling the iiow of fuel from said fuel supply, comprising a fuel valve having an enlarged portion, said air supply having a throat portion adjacent to said enlarged valve portion, whereby the fuel is caused to flow between the inner edge of said throat and the enlarged portion, means whereby on opening said valve a primary current of air will flow through said throat around 'said enlarged portion, and means whereby, on further opening ofl said valve, an auxiliary, air current will iiow through said throat around said enlarged' portion.

10. In a carbureter, the combination with a fuel supply and an air supply, of means for controlling the How of fuel from said fuel supply, comprising a fuel valve having an enlarged portion, said air supply having a throat portion adjacent to said enlarged valve portion, whereby the fuel is caused to flow between the inner edge of said throat and the enlarged portion, means whereby on opening said valve a primary current of air will How through said throat around said enlarged portion, means whereby, on further opening of said valve, an auxiliary air current will How through said enlar ed portion, and means for rotating said va ve.

l1. in a carbureter, the combination with a fuel supply and an air supply, of means for controlling the flow of fuel from said supply, comprising a fuel port and a needle valve having aninverted conical portion eX- tending above said port, the upper part of said conical portion being of comparatively large circumference, said air-supply means comprising a throat portion surrounding the upper part of said valve, the distance between the upper part of said valve and the inner edge of said throat being comparatively small, whereby a narrow annular passage is formed therebetween, means whereby, onk opening the fuel valve, a primary current of air will flow through the narrow annular passage, and means whereby, on further opening of the valve, an auxiliary air current will flow through said narrow annular passage. l

12. ln a carburetor, the combination with a fuel supply and an air supply, of means for controlling the flow of fuel from said supply, comprising a fuel port and a needle valve having an inverted conical portion eX- tending above said port, the upper part of said conical portion being of comparatively large circumference, said air-supply means comprising a throat portion surrounding the upper part of said valve, the distance be- Ltween the upper part of said valve and the inner edge of said throat being comparatively small, whereby a narrow annular passage is formed therebetween, means. whereby, on opening the fuel valve, a primary current of air will flow through the narrow annular passage, means whereby, on further opening of the valve, an auxiliary air current will flow through said narrow annular passage, and means for rotating said valve.

In witness whereof, l have hereunto subscribed my name in the presence of two witnesses.

REUBEN B. BENJAMIN. Witnesses:

lV. L. POLLARD, ANNE SOLOMON.

Copies o this patent may he obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C.

Images