US1005491A - Carbureter. - Google Patents

Description

` A. WBILAND.

GARBURETER.

APPLICATION FILED 11111.21. 1909.

Patented 001. 1o, 1911.

2 SHEETS-SHEET 1.

A. WEILAND.

GARBURETBR.

APPLi'oATIo-HLED 51111.21. 19092 Patented ont. 1o, .11911.

fMA

0. Y Ul-IIHI/ @witnesses @@Cfy/ ALFRED WEILAND, 0F lHllwLm, ENNYI'VAINIA- I l CABBUBIETEB.

To all wlwm it may concern:

' Be it known that I, ALFRED WEILAND, a citizen of the United- States, residing in the city and'coun'ty of Philadelphia, .State of Pennsylvania, have invented a new andA useful Carbureter, of which the following is a specification.

This invention relates to'carbureters and has for an object to supply an air and VHuid mixtureto an engine and so proportion the two relative one to the other as to furnish a at all times and under all conditions a mixture bearing an accurate relationfto the speed of the engine, that is to say under conditions of a heavy load and consequent slow speed, a mixture rich in fuel will be supplied, while in conditions of light load accurately met bya ready response fromA and high speed, v'a 'correspondingly lean l. mixture will be delivered., y

In carburetersas heretofore constructed, the speed of the engine so operates upon the controlling devices comprising the carbureter that'at .the very time a rich niiX- ture is desired the suct-ion around the gasolene nozzle is so reduced as to produce a lean mixture, While at high speed the reverse takes place and instead of having a reduction in the percentage of fuel fluid,`

-an increase takes pace and an overrich mixture is the result. Furthermore, to overcome these diticulties in some carbureters.

the Huid has been controlled by mechanical devices, such as cams, rollers or the like, but their positive action cannot be depended upon at all times for regulation, since lost motion is sure to develop if not actual sticking of the parts to render them inoperative. In such carbureters also an adjustment of the throttle results in throwing other controlling parts out of adjustment and there are no means, in so far as I ani aware,

whereby any controlling parts 'maybe regulated at thc will of the operatorjwithout correspondingly affecting the other coperating parts and thus seriously effecting any predetermined set action.

In my present invention I have devised a ,new and novel carbureter consisting of an arrangement of .cooperating parts `whereloy v th demands upon an engine are freely and the controlling devices operating upon lthe air and fuel fluid.

specification c: Letters Phage. Application led January 21, Serial Np. H3496.

Pat-@mea oct. i0, i911..

into .operation during the' starting move ment of the engine or at very slow speeds, two auxiliary mixture controls, iiv'herebyl at such times an exceedingly 'rich mixture is supplied to impart an .efficient werking stroke to the engine.

=It further consists'of a throttle S9 wr.- ranged and controlled as to permtready adjustment thereof -Witt-ront ai'ecting ad.- jacent coperating partsand also allows these same parts toA be independently adjusted and the relation between theml changed without altering or in any may producing a change'in the position of the throttle, thereby rendering complete regulation of the fluid and the mixture for any predetermined position of the main throttle.

vItfurtlier consists of an auxiliary device controlling an aiixiliary'miXtu-1'e supply and located exterior of the carbureter casing, by means of which the starting and slow speed movements of the engi-tie may be readily controlled. 1

It further-consists of lother novel features of construction, all .as xvi-ll be hereinafter fully set forth.

For the purpose of illustrating my iiivention I have shown in the accompanying drawings one form thereof which is at .pres ent preferred by me, since lthe samehas @been found in .practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which ni-y invention consists can be variously ar-ranged and organized and that my invention is not 'limited to the precise arrangement and organization of these inst-ru.- meiitalities as herein shown and described.

Figure l represents a sectional elevation of a carbureter .embody-ing my invention. Fig. 2 represents a section-on line m-m Fig. l. Fig. 3 represents a section on line if-Hy, Fig. 1. Fig. 4 represents a section through a por-tion of the carbureter showing the auxiliary primi-ng device.

Similar niunerals of Vreference indicate corresponding parts in the `figures.

Referring to the drawings-1 designates a casing forming a fluid reservoir 2, inlet to which is had thi'ough a .port 3,-;the same communicating with .a valve sea-t 4, the present-V instame cylindrical inV form and having aloore 5 therein .adapted to receive It eonsihsts of a tcarbureter having an ad instable ,air valvgso constructed as to throw a valve .As here shawn, the value 6 is erly osition the valve within its seat and permit the tlow of fluid past the said lugs into the casing 1, and has secured to the top thereof aconnection 8 with which cooperates a plurality of suitably piyoted levers 9. These levers are connected, at one end, to a float 10 of suitable buoyant material located within the casing 1 and adaptedto rise and fall as the fluid level varies therein and thus produce a movement of the valve 6 to open and close the opening` to the bore 5 ,to admit fluid through the port 3 and to the reservoir chamber 2.

11 designates a secondy casing suitably mounted on the casing 1 and forming therein a mixing chamber 12, the top of which is formed bya cover 13, the three members, cover 13, mixture easing 11 and fluid easing 1, in the present instance, being secured together by means of suitable bolts 14, whereby their removal permits ready inspection of the interior of my novel carbureter. ,'Ifhe mixture chamber easing 11 is provided with the usual outlet .15, whereby the fluid mixture is conveyed from the mixing chamber 12 to the engine cylinder. The bottom `16Iof the casing 11 is provided, in the present 1nstance, with a depending portion 17 forming an. auxiliary reservoir 18 therein and having in the bottom tthereof an opening 19 per- Imitting the fluid to flow from the reservoir 2 into the auxiliary reservoir 18. lt will be noted that it is preferable to form interior of this auxiliary reservoir, an extension 2O surrounding the inlet 19, whereby a seat 21 is provided, for a purpose to be later described.

22 designates a tubular member, here shown 'as having' threaded ribs 22X to secure it to the depending portion 17 and provided also with an extension 23 conforming in shape 'to the contour of the bottom 16 of the casing 11 and preferably terminating in close proximity to the wall of the bottom 16,

las

whereby in the preferred form an annular opening 24 is provided. The outer edge of the extension 23 is preferably upturned,

whereby a seat 25 is formed fora main air valve 26,' which is connected by radial arms 27 to a sleeve 28, extending in the present instance exterior of the cover 13.

29 designates an opening in the cover 13 forming an air inlet and it will be apparent that when the valve 26 is raised from the seat 25 that the exterior air has a free passage through the main air/valve member 2 tof the mixture outlet 15,

30 designates a throttle valve slidingly mounted in a prolongation 31 of the cover 13, the said prolongation extending a short distance from the bottom ol the casing 11 in order to guide the valve 3Q properly into a seat 32, formed in casing 11, and yet allow free passage of air and fluid to the outlet v15 when the throttle 35 is open. Attention described.

is direct-ed tothe lower portion 30X of the throttle valve, which in the present instance is shown tapering upwardly on one side from a point approximately the middle thereof toward the mixture `outlet, 15, whereby when the throttle is completely closed on one side, the opposite side will be partly open and a slight lead is providedI for the flow of-thc mixture. The throttle valve 30 is preferably formed with integral radial arms 33, which'exlend from a sleeve 34 slidingly mounted in an opening 35 in the cover 13, the end of said sleeve having a thread 36 thereon adapted to receive an adj listing nut 37, for a purpose to be presently 38 designates' a cap suitably securedl to the sleeve 28, in the present inst-ance being threaded thereon in order to provide a rmeans to adjust the position of the valve 26 with respect Ito the throttle 30. The cap 38 is providedwith a series of apertures 39 suitably disposed about the circumference of vthe cap 38 and providing air passages leading from the exterior of the device to the/interior of the sleeve 28. It will thus be apparent that exterior air may be admitted through the openings 39, traversing the sleeve 28 and tube 22, which leads it directly into the auxiliary fluid reservoir 18. The cap 38 is provided with a screw threaded aperture 4() adapted to receive a plug 41 having, in the present instance, integral therewith a tube 42 extending to a point i preferably below the normal level. of the fluid in the reservoir 18 and having apertures 43 adjacent the end, whereby an auxiliary supply oi fluid may be delivered to the reservoir 13 under certain conditions.

44 designates a valve having a bore 45 ltherein and provided with an exterior taper adaijited to co'iperate with the valvescat 21 to control the main supply of fluid from the reservoir 2. The bore 45 is adapted Vto be controlled by needle valve 46, thesame being adjustably mounted on the plug 41 and controlled by thumb nut 47. It will be noted that the tubular member 22 is provvidedwith suitable passages 48 therethrough forming communication between the auxiliary chamber 1S and the chamber 49 leading to the annular port 24.

lt will be noted that the cap 38 normally rests upon the adjusting nut 37 and `gravity thereby allows it to move with the throttle valve 30 in a corresponding manner. Y In order lo maintain correct relation between the lvalve 2G and the throttle 30 a spring 50 is preferably interposed between the two valves. .Tn the present instance the throttle valve 30 is controlled vby a plurality of levers 51 operating in slotted portions 52 of the sleeve 34, the said cranks 51 beingkeyed to la shaft 53and controlled at the will of the operator by a lever 54: Suitable lock nuts 55 and 56 are mounted respectively on the plug 4.1 and needle valve stem `46, whereby the respective parts may be held in adjusted position. i

In Fig. 4 I disclose an auxiliary device controlling an auxiliary mixture supply for starting and slow speed, being located eX- terior of the main casing and detaehably secured thereto by unions 57 having ports 58 and 59 therein leading respectively to the mixture chamber I2Y and fluid reservo-ir 2. In order to accurately adjust the inlet 58, I preferably `provide a valve member 58* of any suitable construction.

'60 designates a tube having an inlet 61 communicating through the aperture. 5t) with the fluid reservoir 2 and an outlet 62 leading to the port 58 and opening into the chamber 12 or any part of the inlet. passages beyond the main throttle 30.

63 designates a tube having needle valve extremity 64 adapted to operate with the inlet opening 61 and adjacent which are a plurality of openings 65 communicating with the bore 66 of the tube, whereby exterior air is introduced beneath the liquid in the tube 60. In the present instance the tube 63 is screw threaded intothe tube 60 and in order to allow an adjustment of the valve 64 a nut 67 is provided iu order to lock the` parts in adjusted position.

It will be apparent by this device that a very rich mixture may be delivered to the engine without opening the main air valve, since as soon as the engine is cranked a vacuum'is'f'ereated within the mixing chamber and its outlet, sufficient to draw in a quantity of air through the'bore 66 and deliver the same through the aperture 65 bel neath-.the surface of the fluid, thereby directly supplying a mixture rich in fuel.

he operation of the de-vice is as fol-i lows :--The earbureter having been properly adjusted and connected, a supply of iluid enters through the inlet 3 and as the float l0 at this tinie is in its lowest position,.the valve 6 will be open and permit an unrestricted flow through the' passage to the reservoir 2 in which it ascends andgradually raises the float. until the desired height has been reached, when the -valve 6 will be operated through the levers Shand cut oil' the further entrance of fluid. The relation between the, float and the valve oj'x\, rating mechanism 8 and 9 is so adjusted as to allow the fluid in the reservoir 2 to'normally rise to a level sufficiently highto till both the auxiliary reservoirs 18 and 6 0 to the desired l'eyel. In the starting and nslow'speed position of the carbureter the controlling valves are in the-position indicated indotted lines in Enig. 1 and it will be noted thatthe throttlgvalve 30, owing to the tapering portion thereof is slightly open at one side to providegn exit for the mixture which has passed through annular opening 24 at starting and slow speed, when the main air valve 26 is closed altogether. In bringing the carbureter into action the throttle valve 3Q is slightly open, leaving the main air valve 26 still closed upon its seat 25 and thereupon preventing any air entering the mixing chamber from the inlet 2f), so that all the air which enters the carbureter does' so by way of the auxiliary starting devices, before described, from which it passes out beneath the fluid in the reservoirs 1Sand 60 Aand exits through openings 48 and 62 rich in fluid fuel, passing to the mixing chamber and engine inlet.

Attention is called to the proportion of the port 24, since it is advisable for best results, to make the same smaller than the smallest area ofA the supplemental air inlet tube 28 or equalizer tube, as I term it, in order that any suction produced in the reservoir 18 may be equalized by the air entering from the outside. The work of the equalizer and external auxiliary carbureter having been performed in thestarting operation, lthe throttle valve BO is further' opened and raises the valve 26 from its seat, since it is supported loosely on the top thereof, whereupon air is permitted free passage through the opening 29 and valve 26, mixing with the overrieh discharge from the annular port 24 and completing .the mixture.

It will of course be apparent as the throttle valve opens that the needle valve 44 is also withdrawn from its seat 2l and allows more fluid to flow into the reservoir 18 to promptly replace whatever has been wit-hdrawn by the entering air. The movementot the throttle, therefore, accurately controls the mixture regulating devices and insures at allspeeds the most etticient mixture, allowing a sure mechanical control of the tiuid without the usual complicated'v cams, rollers and the like. A further feature resides in the ready adjustment of the air control valve 26 andthe needle valves lll and 46, which can be adjusted without disturbing the throttle, therebyallowing a' simple adjustment Afor slow speed without changing the high speed adjustment.

Particular attention is directed to my novel adjustable air throttle which serves to produce a priming action by directing a quantity of air, during the startin-g operation, through the luid in the auxiliary. reservoir, thus giving a rich mixture to 'start the engine. In the event of insuliicient clo. sure of air throttle 26 lthe external auxiliary device can be adjusted to provide the proper mixture for starting and slow speed running. The adjusting nut 37 controlling the izo t'hrottle valve 30 forms an important feature of my construction, since the air control mechanism rests by gravity on the top thereof and hence any movement of tlie'said nut lirst adjusted so that the valve (5ft will ad,

to change the adjustment of the throttle hasno effect whatsoever on the adjustment of the coperating adjuncts. Should the throttle be lett in any one position and the load suddenly taken oit the engine, the increased speed will produce a rapid flow of air through the valve Qt' and the equalizer tube 2S, as well through tube' (36 of auxiliary device, whereby the Huid in the auxiliary reservoir 18 and in the auxiliary device (30 is lowered considerably and the resulting mixture will ctmsequently become leaner as the flow of gasolene is constant and no suction is produced on openings 19 and 61. lVith the throttle in the same position and a heavy load thrown on the engine, the decrease in speed thereof will draw less air through the several passages and the fluid will rise in the auxiliary reservoirs, whereby aricher mixture results to take care of the increased load.

The needle valve 4:6 is so adjusted that when the valve 44 is 'adjusted for high speed in its relation to the seats 21, the passageway 45 will be open about one turn of thethumb screw 47, thereby allowing a further supply ot' fluid to enter by way of ports 4? when running at slouT speed. Of course it will be understood that at high speed this opening is lnot necessary and in fact would be rendered useless, as the fluid in the auxiliary chamber i8 is at that time below the ports liti, thus not interfering in any way with the high speed adjustment when the throttle is open. v

It will be readily appreciated by any one skilled in the art that the combination of the external auxiliary device and the internal equalizer mechanism with a series of adjustments are provided in order to render the range of operation of the engine a very extensive one and to permita much slower speed on the high speed gearing than can ordinarily be obtained and also to permit an' eilicient regulation at slow'speed. It is to be understood that this external auxiliary dcvice-is'not limited in its usefulness to the present carbureter but may be attached to any float feed carburetor to insure prompt and easy starting. f

In setting the device to produce the `best results the external auxiliary mechanism is mit the maximum supply of fluid from the reservoir 2 necessary to obtain the correct v proportion of air and Huid for slow speed and starting work and then the Valve 4l is adjusted in a similar manner tocontrol the inlet 19 so that the necessary' supply of fluid enters the auxiliary reservoir 18 to take care of the miXtu're'for high speed running when the throttle is wide open and then the needle valve 46 is adjusted relative to the bore 45 to compensate forv slow speed work, the result being that the three diiercntly set valves s Work together as to give' si'ilostanl tially perfect control over the mixture at any speed.

It will now be apparent that I have devised a novel and useful construction which embodies the features of advantage enumer: ated as desirable in the statement of the inn vention and the above description and While I have in the present instance shown and described the preferred embodiment thereof which .has been Jfound in practice to give satisfactory and reliable results, it is to be. understood that the same is susceptible oit modification in various particulars without departing from the spirit or scope of the invention or sacriicing any of its advantages.

Having thus described my inventionpvhat I claim as new and desire to secure by Iletters Patent, is

l. In a device of the character described, a main reservoir, a mixin chamber adjacent thereto, a fluid inlet to saidrcservoir, a mixture outlet from said mixing chamber, a throttle valve, an auxiliary reservoir havingcommunication with said main reservoir and said mixing chamber, a main air valve, means to supply a mixture of air and fluid to said mixture outlet when said main air valve isclosed and means to simultaneously control said throttle valve and saidair valveY 2. In ay device of the character described, a main reservoir, a mixingr chamber'adjacent thereto, a fluid inlet for said reservoir, a mixture outlet from said mixing chamber, a throttle valve, an auxiliary reservoir having communication with said m'ain reservoir and said mixing chamber, an air inlet to said auxiliary reservoir, and a port exterior of said throttle valve leadingr from said auxih iai-y reservoir to said mixture outlet.

3.- In a' device ofthe character described,. a main reservoir, a mixing chamber adjacent thereto, a fluid inlet for said reservoir, a mixture outlet from said mixing chamber, a throttle valve, an auxiliary reservoir havingr communication with said main reservoir and said mixing chamber, an air inlet to said auxiliary reservoir, and a port exterior ofsaid throttle valve leading from said auxiliary reservoir to said mixture outlet., the

varea of said port being less than said 'air inlet.. y

.4. In a device of the character described,

a reservoir, a mixing chamber adapted to 5. In a device of the character described, a main reservo1r, a mixing chamber adjacent thereto, an auxlhary reservoir communicatv ing with said mixing chamber, a fluid inlet for said main reservoir, a mixture outlet from said mixing chamber, a fluid inlet from said main reservoir to said auxiliary reservoir, an air inlet for saidlauxiliary reservoir, a valve controlling said Huid inlet and having a bore therein, and a valve controlling said bore.

6. In a device of the character described, a main reservoir, a mixing chamber adjacent thereto, an auxiliary reservoir communicating with said mixing chamber, a liuid inlet for said main reservoir, a mixture outlet from said mixing chamber, a fiuid inlet from said main reservoir to said auxiliary reservoir, a member extending into said auxiliary reservoir and having an air passage therethrough, a throttle valve controlling said mixture outlet, a main air valve mounted on vsaid throttle valve and having an extension forming a continuation of said air passage, and a ca secured to said extension provided with a p urality of openings-communicating with said air passage. y

7. A carbureter comprising a reservoir, a mixing chamber adjacent thereto having communication therewith, a fluid inlet to said reservoir, a mixture outlet from said mixing chamber, a chamber secured exterior of said carbureter and communicating at one end with said reservoir and at the other end with said mixing chamber, a valve controlling the supply'of fluid from said reservoir to said chamber, and means to admit air to 'said chamber to furnish a supply of mixed for controlling said fluid inlet, said stem having a plurality of openings therein land positioned beneath the normal fluid level, whereby an auxiliary supply of mixed air and fluid -is delivered to said mixing chamber.

9. In a device of the character described, a casing forming a reservoir, a mixin chamber communicating therewith, a fluid inlet to said reservoir, a mixture outlet from said mixing chamber, a vtubular member exterior of said casing and communicating with both said reservoir and mixing chamber, a fluid inlet to said tubular member, and means to admit an auxiliary supply of air to said tubular member, whereby a priming mixture is delivered to said mixture outlet. l ALFRED WEILAND. Witnesses ROBERT M. BARR, C. D. MCVAY.

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