US2034163A - Carburetor - Google Patents

Description

March 17, 1936.

G. c. s. VQN -H|LVETY 2,034,163

CARBURETOR Filed Dec. 5, 193C;v

I 4 Sheets-Sheet 2 ATTORN EY Mar h 17, 1936- G. c. s. VON HILVETY 12,034,163

CARBURETOR Filed Dec. 5, 1933 4 Sheets-Sheet 3 INVENTOR GEORGE 69001. 50/025 m vH/Al ETX ATTORN EY Mal-Ch 17, 1936.

G. C. S. VON H|LVETY CARBURETOR Filed Dec. 5, 1933 4 Sheets-Sheet 4 Mi x WINVENTOR GEO/PEEQ/EOA 50/015 VOA/ Hal/Err ATTORNEY Patented Mar. 17, 1936 STATES ATENT other.

CARBURETOR George Carol Schiile yon Hilvety, Buenos Aires, Argentina resides in the fact that the fuel supply device is divided in multiple sections controlled individually or independently from each other as regards the proportions of fuel and admission of air, thereby allowing a perfect regulation of the engine and the economical operation thereof, regardless of the working conditions of same. Also, the section surface of the aspiration zone may increase or decrease, according to the condition or class of work demanded from said engine, said variations causing the different sections of the fuel supply device to be placed or not in service, which will result in an increase, decrease or modification of the operation of said sections. In this manner, the capacity of the carburetor will also increase or decrease, according to the working condition of the engine.

Apart from those indicated above, the new type of carburetor offers, among others, the following features:

(a) It is preferably provided with one or more emulsifying devices, which allow the use of fuel in the form of an emulsion. Said emulsifiers are preferably combined with each section of the supply device, and are individually controlled.

(b) The supply devices may, in turn, be provided with means, also controllable, for automatically stopping the fuel.

(c) Preferably, it uses one or more devices to interrupt the passing of fuel, whether automatically or at will, which is preferably actuated through electric means.

(d) Preferably, it uses auxiliary devices for the filtration of air.

(6) Preferably, it uses a hydraulic device to transmit the movements of the accelerator.

(f) It is provided with means allowing its easy and ready mounting in place of other types of carburetors.

(g) Preferably, it uses compensating means to increase the saturation of the mixture, whether automatically or at will, which are actuated by any convenient means.

(h) The electric control means for the compensator and interrupter are preferably arranged on the same pedal of the accelerator.

The above features, which clearly distinguish the new type of carburetor of the present invention from the prior art, bring about the following advanta'ges:

(1) Allows a perfect control of the fuel mixture, regardless of the working conditions of the engine.

(2) Allows a perfect atomization and gasification of the fuel.

(3) Compels the carburetor to immediately correspond to all the requirements of the motor.

(4') Allows a considerable economy of fuel.

(5) Allows the use of several kinds of fuel, whether simultaneously or, at any required time, in accordance with the working condition of the engine. I

(6) Offers the possibility of omitting the operation of one or more elements.

('7) Due tothe perfect calibration of its conduits, the risks of obstruction by sugar or dirt are decreased.

(8) Allows" the elimination of the injurious vacuum in the cylinders, which avoids the braking of the vehicle and. the rise of oil to said cylind'e'rs.

(9) Brings about numerous advantages respecti'ng the operation of the engine.

(10) It may be readily mounted in place of any type of carburetor.

The invention also has in mind other objects which will become apparent from the following specification, and which will be particularly pointed out in the claims following thereto.

In order that the invention may be clearly understood and easily carried into practice, same has been illustrated by way of example and in one of its preferred embodiments in the accompanying drawings, wherein:

Figure 1 is a partial longitudinal section on the line l-| of Figure 2 of the new type of carburetor which is the subject of the present invention. v

Figure 1 (a) is a complement of Figure 1 from which it is separated by the axis a,a.

Figure 2 is a transversal section of the same carburetor taken on the line 2-2 of Figure 1;

Figure 3 is a further horizontal section taken on the line 33 of Figure 2;

Figure 4 is a partial vertical section on the line 4-4 of Figure 1, showing the arrangement of 50 the governing mechanism of the carburetor choke; v

Figure 5 is a front elevation detail of the device shown in Figure 4;

Figure 6 is a partial detail of the interrupter 55 governing the arrival of the fuel to the different elements of the carburetor;

Figure '7 is a detail of the mixing device;

Figure 8 is a transverse section through the mixing device taken on the line 88 of Fig. '7.

Figure 9 is another transverse section through the mixing device taken on the line 9-9 of Fig. '7.

Figure 10 shows a partial detail of the holding rollers for the governing cable of the choke;

Figure 11 is a front View of the same device;

Figure 12 is a transverse section on the line I2-I2 of Fig. 13 showing one of the fuel or emulsion feechng capsules.

Figure 13 is a diametrical longitudinal section of said feeding capsule;

Figure 14 is a plan view thereof;

Figure 15 is a partial detail of the spring plate adjusting the graduation of the different mixers;

Figure 16 is a transversal section of said adjusting plate;

Figure 17 is a transversal section taken on the line III I of Figure 1, showing the arrangement of the electromagnetic mechanism governing the fuel interrupter;

Figure 18 is a diametrical horizontal section of the piece shown in Figure 7, but adapted in this case to operate as a simple controllable way cock (mechanical ruling) Figure 19 is a vertical section of the mixer shown in Figures 7, 8 and 9, and adapted for use as an aerodynamic mixer;

Figure 20 is a transversal section of the same mixer, taken on the line 20-20 of Figure 19;

Figure 21 is a schematic detail of the accelerator pedal of the vehicle, showing the application of the hydraulic compressor regulating the movements of the piston of the apparatus, and finally:

Figure 22 is a transversal section of the same pedal, wherein it is shown the manner of adapting the independent pedals for the actuation of the electromagnetic device regulating the fuel interrupting stem, and the compensating mechanism.

The same reference numbers indicate like or corresponding parts throughout the difl'erent drawings.

In the illustrated form of construction, the new type of carburetor comprises a main body I of multiple elements, the chief feature of which resides, as will be seen later, in the fact that it is constituted by a series of multiple elements or microcarburetors proper, each ofiering, as regards the operation thereof, the characteristics of a complete carburetor of action completely independent from each other, thus allowing the carburetor, as a unit, to furnish the engine with dilferent proportions of fuel gases, pure or mixed with air, or air only, emulsions or other liquids which it might be convenient to apply to improve the operation of the apparatus. This also permits that during the operation of the carburetor, one or several microcarburetors may be eliminated at will.

To this end, as will be seen in Figures 1 and 2, a series of chambers or cells 2 are arranged on the lower part of the main body I, said chambers or cells being separated from each other by suitably spaced thin vertical partitions 3, which reach up to a certain height of said body. Above the termination of said partitions 3, all the chambers mentioned communicate into a single conduit 4 which extends through almost the entire length of the piece I and communicates with the exterior.

Towards both ends, the body I also extends forming two tubular and cylindrical bodies 5 and 6, of suitable lengths. A small piston displaces in the first of said bodies, viz; in the cylinder 5,

said piston being constituted by a metallic head I, to which an end-piece 8, of rubber or other suitable elastic material, is conveniently adapted, through a socket joint or other means. In turn, the metallic head I of the piston is tightly screwed to the end of a central rod 9, to which it is also secured by means of a small screw l0.

As can be seen also in Figure 1, on entering the chamber I, the opposite end of the rod 9 extends, forming a long tube or cylinder II, of convenient diameter and thickness, the free, open end of which closely fits within the opposite cylinder 6.

' In this manner, the rod 9 as well as the cylinder -I I is perfectly guided by the piston 8, end cylinder 6 and the transversal partition I2 separating the cylinder 5 from its adjacent chamber i. A tubular piece I3, essentially in the shape of a truncate cone, is screwed on the free end of the cylinder 5; the free end of said tubular piece I3 is also screw threaded externally, to receive the thread of the admission tube for liquid under pressure, which serves to produce the displacement of the cylinder II. It will also be seen that a series of small orifices I5, obliquely disposed, are formed through the inner closed end of the tube I I for a purpose which Will be described later. Also, said tube or cylinder I I fits perfectly against the upper edges of the transversal partitions 3, and against the circular concavities in the internal face of the piece I, as can be seen in the detail of Figure 2, thus preventing communication between the lower chambers or cells 2 and the upper chamber 4, for certain positions of said piston.

The end cylinder 6, which as already mentioned constitutes an extension of the piece I, is closed at its outer end by a. screw threaded disc I5 which is integral with a thin stem I6 which is disposed within said cylinder and cupies almost the entire length thereof, serving as a means for holding a spring later to be referred to and also to limit the advance movement of the cylinder II.

The disk I is provided with a series of orifices I! for the admission of atmospheric air to the cylinder 6 under the control of a thin disk I8 which is mounted for rotation on a central pin I 9 and which also is provided with a series of small orifices 20 which, by rotation of said disk, may be made to coincide, totally or partially, with those of the disc I5. Also, between the disc I5 and the bottom of the cylinder II, an helicoidal spring 2I is arranged, the expansion of which tends to maintain said cylinder in closed position, which corresponds to the position shown in Figure 1.

As can be seen in Figures 1 and 2, a feeding capsule (an enlarged view of which is shown in Figures 12, 13 and 14) is arranged in each of the chambers or cells 2, for the purpose of allowing the automatic and progressive stop of the fuel, in such a manner that upon increasing the aspiration on the external surface of the device, the fuel mixture increases in volume but is less rich and vice-versa, according to the working condition of the engine.

Each feeding capsule comprises two concentrical tubes 22 and 23 forced one within the other. The inner tube 23 is medially reduced in diameter so that between the medial portion thereof and the outer tube 22 a small annular chamber 24 is formed. In the upper part of the outer tube 22 are four narrow, parallel grooves 25 occupying approximately one-half of the periphery of the outer tube 22, while in the lower part of said tube 23 is a small circular orifice 26. The central part of the inner tube 23 (hereinafter referred to as the receiving tube) is notched to provide a small orifice 21 which is located in alinement with the orifice 26 and which has bevelled borders as shown.

As shown in Figure 2, each feeding device, as a unit, is mounted in its related cell 2 and is disposed transversely to and extends through the side walls of the piece I with the orifice 26 disposed at the bottom of the device and the grooves 25 disposed at the top of the device.

A collector piece 28, preferably having the shape illustrated in Figures 1 and 2, is arranged on the upper part of the main body I. A flat flange 29 is formed on an upper tubular extension of said piece 28 and provides an instrumentality whereby the carburetor may be bolted to an engine intake manifold. The lower end of the piece 28 is provided with a flange 33 which fits on the piece I and is securely fastened thereto by means of screws or the like 3 I The piece 28 is internally provided with a longitudinal diffuser 32 occupying the entire length thereof, said difiuser having, in section, the shape of an inverted drop, as shown in Figure 2, in order to insure an almost constant passage section for the mixture of air and carbureted gases.

Formed through that portion of the diffuser 32 which underlies the aforementioned tubular extension thereof is a longitudinally extending duct 33 which is closed at its outer end and which communicates at its inner end with a second small duct 34 which extends downwardly and inwardly to a vertical duct 35 formed in the body I and having an orifice 36 opening to the atmosphere. Branching upwardly from the duct 33 into the tubular extension of the piece 28 is a duct or ducts 3'! the upper end or ends of which, as the case may be, is or are flared as indicated at 38.

As shown in Figure 1, communication between the conduits 33 and 34 is controlled by a valve in the form of a rod 39, said valve rod also controlling a small orifice 40 which is provided very close to the inner end of the duct 33 for the purpose of admitting additional atmospheric air to said duct under certain circumstances.

A choke device is arranged against the lower part of the piece I, said choke device being constituted by the laminar piece 4! which is capable of rotating around its horizontal semi-axles 42 and which is contained within a box or casing 43, in the semi-circular bottom of which is provided a series of small openings 44 for the admission of atmospheric air. Rotary movement of the piece 4| is effected by means of a governing mechanism which will be described hereinafter, the rotary movement of said piece being limited by stop screws 45 conveniently arranged in the walls of the box 43. For the perfect adaptation of said box 43 to the body I flanges 48 are formed on the upper border of said box, and by means of screws 41 extending through said flanges the box is fastened securely to the body I.

As can be seen, this type of choke uses as a principle the well known system consisting in closing the central aspiration inlet, which in this case is effected by the movable plate 4|. However, this choke differs from those of the prior art by the perfect fitting thereof in the body of the air filter and not in the body of the carburetor itself. This arrangement is advantageous, as otherwise when removing the air filter from the carburetor, the former will not have the indispensable bodies (the choke device) whereas for the purpose of maintaining the engine (and in the present case, of

maintaining itself) a carburetor should not lack an air filter.

Float devices are arranged at one or both sides of piece I and have the position indicated in Figure 2, said float devices being constituted by three floats 48 housed within corresponding casings 49 conveniently grouped and arranged so as to form a single unit. Each float 48 is guided for vertical movement by a thin cylindrical rod 50, of suitable length, having a threaded head I tightly screwed into the bottom of its related casing 49.

The upper parts of said casings 49 are conveniently closed by a cover 52 having on one side a tubular conduit 53, to which the fuel supply tube is connected, and which is also provided with a further central opening having a glass 54 for the purpose of watching the passage of the fuel.

As shown in Figure 2, a counter-lid 56 is arranged between the body 49 and the cover 52, said counter-lid having screwed in the central part thereof above each float chamber or casing a bushing 57 in which a needle valve 58 is disposed, perfectly guided by same. Each needle valve 58 controls an orifice in the top of its related bushing 51 and, in turn, is controlled by its related float 48. Each valve comprises a body portion including a plate 53 having a small central slot therein through which extends a retaining pin fixed to the piece 31. The lower end 33 of the needle body is rounded and cooperates with a plate BI fixed to the upper part of the float 48, pressure being thus transmitted to the needle 53 when the float rises to close the central orifice of the bushing 51, thus cutting off the fuel coming from the conduit 53. On the upper part of the counter-lid 56 is arranged a metallic gauze 62 in the shape of a capsule, which is preferably fixed to the counter-lid 56, for the filtration of the fuel before same reaches the float chamber.

The mixing devices, the details of which are shown in Figures '7, 8, 9, 19 and 20, are mounted in small chambers in the casing of each of the chambers mentioned. These mixers, which will be described hereinafter and the constructional form of which varies according to whether they are of the aerodynamic or mechanical-aerodynamic type, are arranged in vertical coincidence over the conduits 63 three of which lead upwardly from the bottom of each of the float chambers. Some of said mixers may be replaced by the type shown in section in Figure 18 and which are used in cases where the mixers should act as a simple way-cock.

From the side of each of the mixing chambers a thin horizontal duct fi l leads to the inner tube 23 of a related feeding capsule. coincide exactly with the centers of the tubes 23 of their related feeding capsules, while the first and the last of said ducts communicate, respectively, with the conduit 36 of the compensator and with a small orifice 65 to which reference again will be made hereinafter.

The float devices may be of any known type and the number of float devices used is unlimited.

Also, nozzles or any other feeding devices may or not form part of the emulsifiers. On the other hand, as in known types, the body of the constant level system may or not be provided with mechanism for the regulation or closing of the fuel outlet.

The system mentioned for the control of the outlet, may be arranged on the body of the emulsifier or in other suitable parts, and the corresponding outlet may have dimensions, shapes and arrangements in accordance with the constructional features of the feeding system used.

The ducts 64 Also, the float may be single or multiple.

Following the description of Figure 1, it will be seen that the conduit 85 extends upwardly for a certain distance, ending in a small horizontal groove 68 made in the external wall of the cylinder I I, wherefrom a thin channel 81 starts, communicating directly with the internal chamber 28 of the collector 28.

The mixing device illustrated in Figures 7, 8 and 9 comprises a preferably cylindrical body 69 which is provided with an external thread and which is screwed into its related chamber as shown in Figure 2 to facilitate adjustment of this body, the same preferably is provided with a wrench or key engageable polygonal portion II. On the lower end of the body 89 is formed a tubular extension 12 which terminates in a disk 13 designed to be seated tightly on the bottom of the related chamber through the instrumentality of an interposed elastic ring M.

As will be seen in Figures 2 and 19, one or more inclined orifices 75 are formed through the bottom of the body 69 and provide communication between the interior thereof and the space between the bottom of said body and the flange 73, which space is in communication with the related duct 64. A valve in the form of a threaded rod 18 is screwed into the body 69 of the mixer, said rod having on the upper part thereof an adjusting head Ti and the lower end thereof ending in a sharp point 18, which causes the closing of the fuel when the mixer is of the combined type, and of the air only when the mixer is of the aerodynamic type. For example, the valve 18 may coact directly with the upper end of the fuel passageway extending through the extension 12 of the body 59, in which event said valve controls only the fuel supply. On the other hand, in the case of Figure 19 in which the device is designed to be used as an aerodynamic mixer, the valve 18 acts against the central orifice of an intermediate partition I9, not preventing, therefore, at any time, the free passage of the fuel through the conduit l2 and orifices l5, acting instead on the passage of the air. The partition i9 mentioned, is preferably screwed to the interior of the body 89 and to facilitate the screwing thereof, two or more small orifices 88 have been perforated in the upper part of same, for the adjustment of an adequate key.

In the case of Figure 18, the rod 76 is perfectly cylindrical and acts as a way-cock, regulating the fuel only, and there is no passage of air provided in the threaded rod, while in the case of Figures 7,

8 and 9 (combined aerodynamic-mechanical device) said rod has two or more longitudinal grooves 8| for the inlet of the external air to emulsify with the fuel coming from the conduits 63.

The mixing devices just described are, of course, adjustable by rotation of the valves 16. In this connection, means is provided to frictionally hold the valves in any rotatably adjusted positions in which they may be set, said means comprising, for example, a thin metallic sheet 82, slightly flexible, which is fastened to the body 49 and which is provided with a series of projections 83 arranged to fit into flutings formed on each of the heads 11 of the valves 19.

As may be seen in Figure 12 an interrupting device is arranged between the mixing devices and the feeding capsules, said interrupting device being illustrated in detail in Figure 6 and being constituted by a rod 84 guided within the piece 49 and provided with a series of transverse cuts 85 suitably spaced apart and of such dimensions that in one longitudinally adjusted position of said rod said cuts permit free communication between the outlet conduits of the mixers and the interior of the feeding capsules, and in another longitudinally adjusted position of said rod communication between the mixing devices and the capsules is denied. Figure 2 shows that a second interrupter 84 is provided on the opposite side of the apparatus, said last mentioned interrupter, 84, having the same features as the one just described and being arranged symmetrically therewith. Said second mentioned interrupter is disposed within a piece 86 conveniently shaped and placed directly against the side face of piece I, and provided with orifices 81 allowing the admission of additional air under the control of the second mentioned interrupter. If desired, due to the operating fea tures of the engine or any other reason, the piece 86 just described may be removed and replaced by a second series of float devices, for the purpose of using different fuels at different times and in different proportions.

The movement of the interrupter rods 84 is preferably obtained in a governed manner and by means of a governor (I) of suitable type, such as, for example, the electromagnet device shown in Figures 1, 17 and 22. In the form illustrated, said governor comprises mainly an electromagnet constitute-d by a coil 81 conveniently enclosed in a cylindrical casing or cover 88 which is conveniently fixed to the lower part of the cylindrical extension by means of screws or the like. Said coil 8! encloses a metallic rod 89 acting as a core and which tends to assume the position shown through the action of a helicoidal spring or the like 98, interposed between said coil and a disc 9| fixed to said core. Metallic covers 92, conveniently perforated, cover both ends of said electromagnet, thus maintaining same perfectly protected.

As shown in Figures 1 and 17, the electromagnet core 89 is conveniently connected at one end to a U-shaped rod 93, the interrupter rods 84, described above, being in turn linked to the ends of said rod 93.

With this mechanism, every time the electromagnet coil attracts the core 89, the interrupters 84 will be moved longitudinally a certain distance. According to the positions of said interrupter rods, the grooves 85 will coincide or not with the passage conduits 64 for the fuel, thereby establishing or interrupting at Will the arrival of said fuel to the feeding capsules.

The operation of the electromagnetic governor (I) is effected through the pedal device shown in Figures 21 and 22, wherein 94 designates the usual engine accelerator pedal. On one of the borders of said pedal (in the present case the left border) a small auxiliary pedal 95 is linked, said auxiliary pedal being arranged in such a manner that on being pressed downwardly, same establishes contact between two metallic sheets 96 and 91, conveniently insulated and fixed to the pedals 94 and 95, respectively. Also, one of the plates mentioned, for example the plate 96, is electrically connected to the positive of the battery 98, while the opposite plate 9'! is connected to the negative of said battery, that is to say, to ground. In this manner, every time the auxiliary pedal 95 is operated, the circuit of the electromagnet (I) will be closed, said electromagnet acting on the interrupter rods 84, thereby closing the passage of fuel to the feeding capsule; on the other hand, on releasing said pedal, the magnetic attraction on the core 89 will cease, and the spring 90, by expansion, will push said interrupters to their opposite position, allowing the free passage of fuel from the mixing devices.

Figure 1 also shows a further electromagnetic governor (II), similar to the previous one, the core 89' of which is directly linked to the rod or stem 39 of the compensating device. The operation of this electromagnet is governed by a further auxiliary pedal 85 linked to the opposite border of the accelerator pedal 94, and operates in the same manner as the opposite pedal 95, above described. As will be understood, upon pressing the auxiliary pedal 95', the circuit of the electromagnet (II) will be closed, said electromagnet attracting the core 89' which will displace the compensator rod 39, allowing the free communication of the conduits 33 and 34 above referred to. On the other hand, upon releasing said pedal, the attraction of the electromagnet on the core 89' will cease, and the expansion of the spring 93' will cause an advance of the rod 39, which will instantaneously interrupt the free communication between said conduits 33 and 34.

To facilitate lateral displacement of the foot on the accelerator pedal 9 one or more small rollers 99 are arranged in a suitable position thereon, thus facilitating the operation of any of the auxiliary pedals 95 and 95.

As can be seen in Figure 21, from the pedal 94 depends a small rod lull forming part of a small piston IQI, which operates within a cylinder IE2 arranged preferably on the floor of the vehicle or other suitable place. Said piston I8 I is constantly pushed upwardly by the action of a small spring I03, placed in the interior of the corresponding cylinder.

A small tube I84 leads from the cylinder I02, the free end of said tube connecting with the end I3 of the extension 5 previously mentioned. In this manner, each time the pedal 94 of the accelerator is pushed downwardly, the piston IOI will compress the liquid contained within the tube I04, and the internal pressure thus generated will cause the advance movement of the piston 8 shown in Figure l, viz; the piston of the cylinder I I, which will govern the operation of the different elements of the carburetor. For the purpose of perfectly regulating the hydraulic pressures generated by the downward movement of the pedal 94, the extreme end of the rod I510 is capable of being fixed at different points along said pedal, for which purpose it is conveniently contained within a bridge or guide I95, fixed to the lower part of said pedal.

Completing the device subject of the present invention, Figures 1, 4, 5, 10 and 11 show the device for regulating the carburetor choke, which consists mainly of a small grooved pulley I 06 which is fixed on the free end of one of the semiaxles of rotation 42 of the choke H (see Figure 1), and which is conveniently enclosed in a circular casing ID'I on which a suitable cover I93 is applied. Over the periphery of the mentioned pulley I36 is arranged a thin cable I09, preferably metallic, and enclosed within a rod of flexible metallic type, or other suitable type, said cable being fixed to the mentioned pulley by means of screws or the like IIO. On one of the ends of the cable mentioned, a small disc III is fixed, which is constantly pushed upwardly by means of a spring I I2 conveniently arranged within the same box; in turn, the opposite end of said cable passes between the throat II3 of two small guide rollers I I4, ending in the vehicle panel, within the drivers reach.

Said guide rollers H4 are conveniently seated on two small flat projections II5 on the cylinder 6 and are held in position by screws IIB suitably screwed to said projections.

As will be understood, the drawings of the cable Hi9 causes the rotation of pulley IE6 and axle 42 in the direction indicated by the arrow in Figure 4, thus producing partial or entire closing of the laminar piece ll of the choke. On the other hand, on releasing said cable, the spring II2, by expansion, will push disc II I upwards, consequently causing partial or entire opening of said piece ll.

As can be seen in Figures 1 and 2, a flat plate 5 Il' is arranged at the bottom of piece I between this piece and the box 43 of the choke, said fiat plate being capable of sliding longitudinally and being removed from its position after the removal of a small cover H8. with a series of transversal openings II9 which coincide in position with the different cells 2 which have been formed on the lower part of piece I.

A small chip or disc I26 may be placed in any one or more of the said openings I I9, which, closing the inlet of the corresponding cells 2, will prevent the admission of air thereto.

While the invention has been described with reference to a specific type of apparatus, it is evident that same is capable of modifications in different manners, within the scope of the appended claims.

For example, instead of dividing the carburetor into multiple microcarburet-ors, same maybe constructed eliminating the partitions 3 and using multiple feeding devices which would operate when the piston I or other device of the accelerator is moved, allowing a larger admission of air and simultaneously the part or total operation of said feeders, and vice-versa.

Also, the piston TI may be governed by means other than those described and illustrated, and if desired, same may be substituted by any other equivalent device.

While independent mixers for each feeder have been described and illustrated, it is evident that a single mixer for all the feeders, or mixers for groups thereof, may be arranged,

While the operation of the present invention is quite clear and requires no further explanation to those who are experts in the art, we will give below an abridged rsum of same, as well as of the operating possibilities of the apparatus.

Once the motor has been started in the known manner, the feeding of fuel thereto is produced through the conduit Bl which communicates by means of the channel 66 formed on the wall of the piston I I, with the conduit 65 which in turn received the fuel emulsion from the mixer 69.

Upon pressing downwards the accelerator pedal 94, the movement is transmitted by hydraulic means to piston 9 and to I I. The latter, upon displacing, will successively uncover the microcarburetors and at the proper moment interrupt communication between the conduits 65 and 61. The feeding capsules 22 of the microcarburetors 2 receive the emulsion through the conduits 54 of the mixers 69 which in turn receive the liquid fuel from the constant level chambers. The emulsion of liquid fuel and air in the desired proportions, which is controllable by screw TI, is effected in the mixers 69.

By pressing the lever 95 from the accelerator pedal 94, an electric connection is established,

Said plate II! is provided which operates the electromagnet (I) which draws .the pistons 84 by means of rods 93, thereby regulating the flow of emulsion to the microcarburetors at the desired moment.

By pressing the lever of the accelerator, the electric connection is established which operates the electromagnet (II) to draw the piston 89, thereby obtaining the passage of emulsion from conduit 34 to 33. We will refer to this auxiliary feeding system asthe compensator, the purpose of same being to supply at the desired moment a richer fuel mixture with which it is feasible to obtain an extremely economic feeding in the microcarburetors, and if necessary, at any given moment, to demand a higher work of the motor, it will be sufficient to press the governor of the compensator.

The duties of the compensator are as follows:

(1) To interrupt the arrival of fuel, thus obtaining an economy of same;

(2) To produce a period of ventilation for the cylinders with atmospheric air;

(3) By completely pressing the accelerator downwards and simultaneously operating the interrupter, a motor brake effect is obtained, preventing at the same time the rising of the oil;

(4) When the piston is in a determined position, on operating the interrupter a similar effect to that of a free wheel is obtained.

It is possible to stop the operation of the desired number of microcarburetors. In case a microcarburetor should be out of order, the carburetor will continue to operate. It is possible to use several fuels simultaneously, successively, alternately, etc.

The different microcarburetors are regulated independently but are related to each other.

The system of constant level chambers, due to their constructive features, may be set for updraught and down-draught, according to the characteristics of the motor.

The placing of the electric governors of the interrupter and compensator on the same accelerator allow all the advantages of these two devices by means of simple lateral displacements of the foot.

I claim:

1. In a carburetor, a body having a plurality of separate fuel cells, a fuel and air mixing device individual to each cell, said body having a fuel outlet conduit, a valve operable to deny flow of fuel from all of said cells to said outlet conduit and to successively open said cells for delivery of fuel therefrom to said outlet conduit, means separate from said cells for flow of fuel to said outlet conduit when all of the cells are closed, means whereby movement of said valve to open said cells cuts off flow of fuel through said last mentioned means, means for the flow of atmospheric air to the fuel outlet conduit, a valve controlling flow of atmospheric air to said outlet conduit, yieldable means holding said last mentioned valve' normally closed, and electro-magnetic means for opening said last mentioned valve.

2. In a carburetor as set forth in claim 1, a pedal, hydraulic means operable by said pedal to actuate the fuel control valve, and means on the pedal controlling operation of the electro-magnetic means for opening the atmospheric air supply control valve.

3. In a carburetor as set forth in claim 1, an-

able means for moving said valve in one direction, and electro-magnetic means for moving said valve in the opposite direction.

4. In a carburetor as set forth in claim 1, an axially movable valve common to all of the fuel and air mixing devices for controlling the supply of fuel to said devices, yieldable means for moving said valve in one direction, and electro-magnetic means for moving said valve in the opposite direction.

5. In a carburetor as set forth in claim 1, a pair of axially movable valves both common to all of the fuel and air mixing devices for controlling the supply, of fuel and air to said devices, respectively, yieldable means for moving said valves in one direction, and electro-magnetic means common to both valves for moving them in the opposite direction.

6. A carburetor comprising a body having a plurality of separate fuel cells in a lower portion thereof, said cells being open at their tops and bottoms, a fuel and air mixing device individual toand Within each cell, valve means for regulating the flow of air into said cells through the bottoms thereof, a pair of longitudinally movable valves located to opposite sides of said fuel cells for controlling the supply of fuel and atmospheric air to said fuel and air mixing devices, a longitudinally movable valve above said fuel cells for successively opening and closing the upper ends of said cells, thereby to control the delivery of admixed fuel and air from the carburetor, spring means for moving said last mentioned valve in one direction, hydraulic means for moving said last mentioned valve in the opposite direction, spring means for moving said pair of valves in one direction, and electro-magnetic means for moving said pair of valves in the opposite direction.

7. A carburetor as set forth in claim 6 having i in the body thereof a conduit for the supply of atmospheric air to the admixed fuel and air delivered from the cells, a valve controlling flow of atmospheric air through said conduit, spring means holding said valve normally closed, and electro-magnetic means for opening said valve.

8. In a carburetor, a body having a plurality of separate fuel cells, a fuel and air mixing device individual to each cell, said body having a fuel outlet conduit, an elongated valve longitudinally movable in one direction to a position to deny flow of fuel from all of said cells and in the opposite direction to successively open said cells for flow of fuel therefrom to said outlet conduit, manually operable means for moving said valve in the last mentioned direction, a tube carried by the body in which said valve is guided for longitudinal movement, said valve being hollow, abutments at the inner end of said valve and at the outer end of said tube, a coil spring within said tube and valve seated against said abutments and thereby tending constantly to urge said valve toward its first mentioned position, said valve being open at its outer end and having an opening in its inner end whereby air may flow from the interior of the tube and valve into the space vacated by the valve when the same is moved into the tube during successive opening of the fuel cells.

9. In a carburetor as set forth in claim 8, a

valve at the outer end of the guide tube to regulate flow of air into said tube and into and through the hollow valve.

GEORGE CAROL SCHU'LE VON HILVE'I'Y.

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