US1313521A

US1313521A - Carbureter

Info

Publication number: US1313521A
Authority: US
Publication date: 1919-08-19
Anticipated expiration: 1936-08-19

Description

H. M. CONNOR AND D. D, MILES.

CARBUHETER.

APPLICATION FILED JULY 23. 1917.

Patented u 19, 1919.

Donlljllileaj 6 UNITED STATES PATENT OFFICE.

HERSCHEL M. CONNOR AN D DON D. MILES, OF SAN FRANCISCO, CALIFORNIA, ASSIGNORS OF ONE-HALF TO ALBERT H. HERBERT, ON E-FOURTH TO MYRTLE C. MILES, AND ONE- FOURTH TO PANSY I. CONNOR, ALL OF SAN FRANCISCO, CALIFORNIA.

CARBURETER.

Application. filed July 23,

To all whom it may concern: 7

Be it known that-we, HEnscunL M. Coxxon and Don 1). MILES, both citizens of the United States, residing at San Franclsco, 1n the county of San Francisco and State of California, have invented certain new and useful Improvements in Carburetors for Intcrnal-Con'ibustion Engines; and we do hereby declare the following to be a full, clear, and exact description of the invent-um. such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to carburctcrs for internal combustion engines, but especially adapted for automobile engines, and has for its object to provide for the more eilicicnt mi.\ing of the fuel and air; to provide a -means for the easy starting of the motor; to avoid the employment of spring controlled valves, auxiliary air passages or moving parts other than the needle valve controlling the fuellevel; and to provide a multiplicity of fuel jets by which the charge of fuel is split up or divided into several parts that will facilitate the atomizing action.

'ith these and other objects in view the invention consists in the novel details of construction and combinations of parts more fully hereinafter disclosed and par- I ticularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification in which like numerals designate like, parts in all the views Figure 1 is a sectional view of a'carbureter made in accordance withthis invention;

Fig. 2 is a side elevational view partly in section of the parts shown in Fig. 1;

Fig. 3 is a sectional view taken on the line 33 of Fig. 1 looking in the direction of the arrows.

1 indicates the upper portion of the outer shell of the carlmretcr, 2 the lower portion of said shell, joined as at 3 to the upper portion 1, and provided with the hot air tube or passage 4: leading from the exhaust manifold in order that air drawn in by the carburetor will be preheated. 5 indicates a choke or butterfly valve controlling the passage 4 and the admission of air intothe chamber 6. Located inside the carburetor body portions 1 and 2 is the interior shell 7 provided with the helically disposed flanges or members 8 v Specification of Letters Patent.

Patented-Aug. 19, 1919. 1917. Serial No. 182.342.

and to the lower end of said member 7 is screw threaded the member 9, provided with the flange 10 against which fits the lower portion 2 of the carbureter proper as shown. Said member 9 is provided with the extension or member 11 surrounded by the meniher 12. provided with the coupling 13-lead ing from which is the fuel connection 14.

Said member 12 is locked to said member 11 float :21. A valve 25 controls the port 20Uand,

is provided with a stem or extension 26.- to' which is secured the grooved member 27 adapted to be actuated by the ends 28 of the controlling weights 29 pivotedas at 30 tothe,

bracket or support 31 carried by the slceve' 32, mounted on the support 33as shown. l

The lower end of the inner member or casing 7 is provided with a plurality of ports or passages connectin the fuel space a 23 with the annular chain 1' or main fuel supply 36, and .37 represents a port connecting said annular chamber 36 with a second annular chamberor auxiliary fuel supply 38 M open to the atmosphere by means of the curved pipe 39. Passing through the upper wall 4-1 of the annular chamber 38 are the nozzles 40 and 41 having respectively the fuel passages 42 and 43. The nozzle 40 is shorter than the nozzle 41 for a. purpose that will appear below. Passin throughthe said upper wall 44 of the annu ar chamber 38 as well as through the upper wall 45 of the annular chamber 36 are the fuel nozzles 47 and 48 provided respectively with the bores or

passages

49 and 50. 51 and 52 represent respectively a pair of additional fuel nozzlesin all respects similar to the nozzles 47 and +8 and which likewise pass down, through the said walls 44 and 45 into the annular main fuel supply chamber 36. It will be observed that both thenozzles 40 and 41 lead from the chamber 38 while the main nozzles 47. 48. 51 and lead from the main fuel supply 3b.

It will be observed that the nozzles 40,

41, 47, 48, 51. and 52 are located in a circle and that they extend'upwardly and into the annular passage 55 between the outercarbureter wall 1 and the inner member 7, so that air which may be-sucked through the passage 4 and from the chamber 6, will pass around said nozzles, and owing to a restriction in said passa e to be described below, it will suck any uel which may be contained therein out of the respective bores, such as 42, 43, 49, 50, etc., so that said air will serve to finely subdivide or atomize the fuel found in said nozzles. The helically disposed members 8 carried by the inner cylindrical member 7 form helical passages and it is preferred to so arrange the parts that there shall be a separate helical passage for each of the said nozzles. That is to say, the nozzle 47 for example, may open or'lead into a passage 56 while the nozzle 48 may lead into a companion helically arranged passage '57, etc.

It thus results that as the air drawn from the passage 4 circulates around the annular passage 55, in which the ends of said nozzles are located, the said air is separated or divided into parts, one of which traverses each of said helical passages such as 56 and 57, and thus there are as many separate portions of the air as there are passages. By thus dividing the air into separate divisions or parts the atomization of the oil from each nozzle is greatly facili tated.

In order to more effectually suck the fuel out of the bores suchas 42, 43, 49, 50, etc., of the nozzles I restrict the passage of the air from the annular chamber 55 into the respective helical passages such as 56 and 57, by providing the solid portions at the bottom of the helixes, see Fig.2, and in order to cause the fuel to more perfectly mix with the air the surfaces of the said solid portions 70 are curved as is indicated "at 59. The curved surfaces thus provided have the effect of causing the air to swirl around in the passages 56, 57, etc., and thus to thoroughly mix with the fuel as said fuel and air is sucked along said passages into the chamber 63 to be mentioned below.

0 represents a pipe or passage connecting thecham'ber 61" above the float 24 with the atmosphere. 62 .represents a throttle or other valve controlling'the passage of mixed fuel and air into the engine and 63 represents the chamber or space into which the mixed fuel and air is. delivered from the helical passages.

The operation of-this device will be clear from the foregoing but may be briefly summarized as follows:-

- There being a suction created .past the valve 62, preheated air will be sucked in through the passage 4 Into the chamber 6 and into the annular chamber or passage 55 around the exits of the various nozzles such as 40, 41., 47, 48, 51, 52, etc. The fioat 24 having been so adjusted that oil will rise to a predetermined level, say slightly above the lower ends of said nozzles 40 and 41,

said air will suck fuel out of the nozzles sage, and will be drawn along said 'passages while still rotating, so that by the time it reaches the chamber 63 it will be thoroughly atomized or mixed with said air. The said oil or other fuel thus at first sucked from the said nozzles will a com paratively rich mixture, and therefore, will be suitable for the easy starting of the motor. But, the curved pipe 39 iss'of'propor" tioned as toextend above thetlevel of the oil or other fuel maintained in the, cham- 'ber 23, and therefore, air will soon enter the said chamber38 and occupy the bore 42, of the nozzle 40, so that after the initial suction or starting of the engine, the noz-- zle 40 will deliver either a very lean mixwithstanding the admission of'air into the chamber 38 through the pipe 39. However, if the engine speeds up owing to the restricted character of the port 37, and its inab'iiity to supply a greater quantity of oil-than will feed one nozzle suchas 41, the mixed fuel and air that leaves the nozzle 41 will be always a lean mixture while the engine is running. In the meantime, the air drawn through the passage 4'and from thechamber 6 into and through the annular chamber 55 will continue to suck fuel from the main feed nozzles such as 47, 48, 51 and 52, and thus supply theengine. The ports 35 are made of su cient dimensions to keep the annular' or main feed chamber 36 well supplied with fuel, and therefore, the nozzlessuch as 47, 48, 51 and 52 are always furnished with sufficient oil for the running of the engine.

result that hot air from the chamber 6 freely circulates around said fuel chambers thus effectually preheating the fuel sucked from said nozzles, aml thereby greatly facilitatlng the atomization of said fuel and its sub' sequent mixture with said air.

It will thus be seen that as the engine speeds up, fuel will cease to pass through the bore 12 of the nozzle 10 and a very small quantity of fuel will pass through the bore 43 of the nozzle fll, but larger and larger quantities of fuel will pass through the main feed nozzles such as 17 48, 51 and 52. In other words, the auxiliary feed chamber 38 being open to the atmosphere, an increase in suction will have no effect upon the amount of fuel passing through the nozzle 41. An increase in suction on the other hand, will cause greater and greater quantities of fuel to pass through the main feed nozzles. Stated in other language, it will thus be seen that thi carbureter employs no spring ,controlled valves and other-accessories that are liable to get out of order, while it provides a means of furnishing a rich mixture for starting the engine, it furnishes a means of supplying a constant quantity of mixed fuel and air at low speeds through the nozzle 41 which is independent of the suction, and it furnishes a supply for said main feed nozzles 17,48, 51 and 52, which supply varying quantities of fuel according to the speed of the engine.

So perfect is the atomization of the fuel that this carbureter is not only adapted for the ordinary gasolene fuels but it is also adapted for the heavier distillates such as kerosene. It will be observed that the parts may be readily assembled and disassembled, for repairs, cleaning, etc., in that it is only necessary to remove the locking bolt or screw threaded member 12 whereupon the fuel supply is readily taken off; and upon unscrewing the member 9, the lower port 2 of the carbureter readily separates from'the upper port 1, and the port 7 may be readily withdrawn from said port 1.

As the float 24 ascends it contacts with the Weights 29 whichserve through their ends 28 to depress the needle valve 25 and thus cut off the supply of fuel. 75 represents the usual throttle controlling lever and 7 6 the usual pivot or shaft for the butterfly valve 5.

It is obvious that those skilled in the art may vary the details of the construction as.

well as the arrangement of parts without departing from the spirit of the invention, and therefore, we do not wish to be limited to the above disclosure except as may be required by the claims. I -What we claim is 1. In a carbureter the combination of a fuel supply; automatic means for controlling the flow of fuel to said supply; an intake through which air may be sucked; a plurality of nozzles located in the path of the sucked air; helically disposed means affording a plurality of independent paths for said air after leaving said nozzles; and

means to restrict said paths around said nozzles, substantially as described.

2. In a carbureter the combination of a plurality of fuel supply nozzles; helically disposed means affording a passage of air around said nozzles; means to restrict said passages around said nozzles, said helically disposed means adapted to cause-said air to assume a whirling motion after it passes said nozzles; and affording a plurality of independent passages for the mixed airand fuel as it leaves said nozzles, substantially as described.

3. In a carbureter the combination of a plurality of fuel supply nozzles; means to provide a helically disposed passage for each nozzle; means to cause air to flo'w past said nozzles into said passages; and means associated with said passages to restrict said air to cause it to assume a whirling motion as it leaves said nozzles, substantially as described.

4:. In a carbureter the combination of a main fuel supply; a plurality of main'fuel feed nozzles fed from said supply; an auxiliary fuel supply; means for admitting air feed nozzles fed from said supply; an aux-- iliary fuel supply; means admitting air to said auxiliary supply; a pair of feed nozzles communicating with said auxiliary supply a plurality of restricted helically disposed passages associated with said nozzles;

. and means to conduct. air past said nozzles into said passages, substantially as described.

6. In a carbureter the combination, of a plurality of main feed nozzles; means to supply fuel to said nozzles; a plurality of auxiliary nozzles; means to supply fuel to said auxiliary nozzles; means to admit air to said last named means; a helically arranged passage for each nozzle; means to conduct air past said nozzles into said' passages; and means associated with said passages for imparting a whirling motion to the mixed air and fuel as it enters said pas sages, substantially as described. 1

7. In a carbureter the comb-nation of 'a plurality of main feed nozzles; means to supply fuel to said nozzles; a plurality of auxiliary nozzles; means to supply fuel to said auxiliary nozzles; means to admit air to said last named means; a helically arranged passage for each nozzle; means to conduct air past'said nozzles into said passages; means to automatically regulate the amount of fuel entering the carbureter; and means associated with said passages comprising a curved surface for imparting a whirling motion to the mixed air and fuel as it enters said passages, substantially as described.

8. In a car'bureter the combination of a plurality of helically disposed open ended passages; means comprising a curved surface to restrict the passage of air and to impart a whirling motion to the same at one end of each passage; a feed nozzle associated with each passage near said curved surface;

and means to conduct air past each nozzle and through each passage, substantially as described.

In testimony whereof we aflix our signa- 15 tures in presence of two witnesses.

HERSCHEL M. CONNOR. DON D. MILES.

Witnesses:

H. A. DOYLE, MARY L. THOMAS.