USRE14556E - Motor devices - Google Patents

Description

- u MGR. uvmestou.

CKRBURETER. APPLICATION FILED OCT. I8, I917- Reissue d -Nov.- 26, 1918.

UNITED STATES PATENT OFFICE.

D McRA LIVINGSTON, OF NEW YORK, N. Y., ASSIGNOR TO STROMBERG MOTOR DEVICES COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CARBUBETER.

To all whom it may concern:

Be it known that I, D MCRA LIVINGSTON, a citizen of the United States, and a resident of the city of New York, borough of l\Ianhattan, in the county and State of New York, have invented a new and Improved Carbureter, of-which the following is a full,

clear, and exact description.

The object of the invention is to provide an improved form of carbureter, which will serve for the production of a proper fuel mixtureunder all conditions of operation of. the engine.

'Reference is to be had to the accompanying drawings, forming a part of this speciT fication, in which similar reference characters indicate corresponding parts.

Figure l is a sectional elevation of a portion of the carbureter, showing my improved nozzle. Fig. 2 is an enlarged sectional view of the nozzle. Fig. 3 is a horizontal sect-ion on approximately the line 3 3, Fig. 2. Fig. 4 is a vertical section of a modified form of nozzle embodyingmy invention, and Fig. 5 is a horizontal section on line 5 5 of Fig. 4.

My invention may be embodied in'any suitable carbureter body 10, having the usual reservoir, connecting as by a passage 11, with the chamber 12, closed by the usual screw plug 12, beneath the base plug 13 of the nozzle 14, the said nozzle extending as usual into the mixing tube 15, leading to the engine, the said tube being provided with any approved throttle 16 and air inlet 17.

In the base 13 any suitable regulating plug may be provided, here shown as a single plugl8, having a-passage19 leading .to the interior of the nozzle-14. The nozzle proper or main jet of my improved invention is formed by the outer wall of the nozzle and an inner wall 20, providing-an intermediate gasolene chamber 21. Withinthe inner wall 20, an air pipe 22 rises, from the base 13 and is supplied with air through any suitable inlet 23 thatdesirably is-connected with the air pipe 22 by the peripheral groove 24 in the base plug 13, and the connecting passage 25 that leads from the peripheral groove to'the interior of the air pipe 22, at the base of the latter.

- In connection with the air pipe 22, I provide a device whereby the gasolene will form a liquid seal at the outlet end 26 of said air pipe; advantageously this device for the ably the outlet from the passage between the Specifieationof Reissued Letters Patent. Reissued N 26, 1918 Original No. 1,112,374, dated September 29, 1914, Serial No. 643,312, filed August 10, 1911.

' reissue filed October 18, 1917.

Application for Serial No. 197,260.

seal may rounds the pipe to any desired extent along the length thereof, but preferably only extending a short distance below the top, as clearly shown in Figs. 1 and 2. The nousing 27, is preferably closed, except for the provision of an outlet, so formed that more 01' less air-may be drawn from the air pipe 22 and through the housing 27, so that there will be a gradual breaking of the liquid seal and a consequent gradual increase in the amount of air drawn through the nozzle, according to the extent of the vacuum produced by the speed of the engine. Desirhousing may consist of a diagonal series of holes 29, leading outward from the interior of the housing 27, to the space between the said housing and the inner wall 20 of the main jet ornozzle proper. It will beobserved that the pipe 22, and its housing 27, form in connection with the inner wall 20, of the main jet, a I

liquid seal for the air pipe and the capacity of the diagonal openings 29, determine the amount of air drawn through the auxihaly consist of a housing 27, that surjet-under high speed. Normally both ets will simply deliver-gasolene only when the engine is under slow speed, but upon an increase of the speed, the air will be drawn into the chamber 30 which constitutes the fuel connection and the outlet of the nozzle of the auxiliary jet or feed device, the air being drawn 'into said chamber or passage through the air inlets .29 leading thereto, and as these inlets are at different levels, under increasing speed an increasing amount of air will be drawn into thechamber 30 through successive inlets brought under theinfiuence of the suction, to mix with the fuel being drawn upward in chamber toward the nozzle outa relatively decreasing the said fuel let. Thus there is fuel discharge from the auxiliary nozzle or 3 jet under the suction of increasing engine I cally regulating with the main fuel-feed fully responsive with a speed as compared jet, the latter being relatively increasing fuel discharge;

The dotted line in the gasolene reservoir at the left of Fig, 1 indicates approximately the height of the gasolene in said reservoir, and the gasolene will rise ordinarily, to a similar height in the gasolene' chambers 21 and 30.

It willrbe seen that the described automatinozzle is self-contained, the members being mounted on the plu 13, which can be readilyadapted' to most orms of carbureters now in use, a slight Inodification only bein necessary to provide the necessary induct or the air to the contained air chamber of the nozzle. 1

Referring to Figs. 4c and 5, Ihave shown j another form of this nozzle,'in which the f zle instead of the center as air chamber 35, is at the exterior of the nozin the first de- 2 'scribed form. Within the outer skirt or de- 3839, forming pending casing, 36, forming an outer wall of the air chamber 35,, there are supported on the base 37, spaced, concentric walls,

concentric gasolene chambers or jets 4H1, provided with separate gasolene ducts, 42%3, controlled by regulating plugs, In connection with the casing or wall 39, of the inner chamber 1 her 35, thus forming a v provide as lene chambers or jets, 4M1.

or jet, 41, I'preferably provide a bushing 46,

which reduces or contracts the upper outlet end of the said chamber 41, and I may also tor extending from the wall 39 and flaring nutwardlv and upwardly, above the gasolene chamber 40, the outer edge of the, deflector being joined by a horizontal portion48 to the exterior wall or skirt 36 of the aircham-. passage betweenthe upper end of the said air chamber and the upper end of the adjacent gasolene cham-' ber 40. Near the upper end of the interior wall 39, said wall is provided with a diagonal series of orifices 49, thereby establishing a communication between the two gaso- Above the outlet end 466 of the chamber-41, a plug 50 may be screwed, provided at its, lower end with posed o Hector 4 posite to and spaced from thexdefor deflecting and more effectively breaking up the gasolene or mixture issuing from the outlet 46, the mixture finally finding an outlet'through holes 52 in the upper end of the nozzle below the screw plug 50 therein;

In operation the gasolene will be taken up by the engine through the outlet 46,

without any admixture of air taking,, place inthe nozzle while the engine'is running at slow speed. Upon an increase of speed,

= .howewer, the level of the gasolene in the or slow speed conditions.

shown a deflector 47, said deflecan inverted, truncated cone 5-1, dischamber 40- will taken along with the gasolene through the openings 49 in proportion to the increase in the/speed.

In both forms of the invention, the air chamber is provided in the nozzle itself, so that the nozzle is self contained and may be completely inserted in a. carbureter, adapted. to receive the base plug 13 or 37. In both forms also, the upper end of the air chamber is sealed by the asol ene, under-normal be lowered and air will be Although the invention 7 is mainly designed to produce a. self-contained, automatically. controlled nozzle, functioning without adventitious air or fuel chambers for governing the suction control ofthe air vious that in some of its aspects, the invention is not limited to a self-contained nozzle.

To prevent a too sudden breaking of the liquid seal of the air chamber the housing 27 or the next adjacent wall, 21, or both, may be formed'out of pering the housing as at 27, Flg. 2. In this way the suction, after partially breaking the liquid seal,

ad'acent Wall.

' aving thus claim as new,

Patent:

1-. A carbureter nozzle comprising a suctionfcontrolled jet, the passageway of which described my invention, I and desire to secure by Letters nozzle and having a suction controlled fuel seal at its outlet end within the nozzle, the

sealed area of the said outlet of the air exerted on the nozzle. V

2. In a carbureter, a carbureting chamber having a mixture outlet and an air, inletof parallelism, as by ta supply under high' speeds, it will be obwill have a less pronounced effect in drawing inthe air, owing to the gradually increased widening of the throat or space between the housing and the constant sizeregardless of suction, and a stationary air duct extending into the v duct decreasing with the extent of the suction constant size regardlessof suctioin -a constant level liqui fuel chamber, a fuel inlet for said carbureting chamber, an auxiliary fuel chamber fed from said constant level liquid fuel chamber through of constant size regardless of suction, and feeding said fuel inlet,said auxiliary fuel chamber having air admissible thereto, and a plurality of passageways through each of which air may pass to the fuel inlet, said passageways being normally sealed by the 5... a passageway liquid fuel in said auxiliary fuel chamber but being successively unsealed as the level of liquidin said auxiliary fuel chamber descends.

In a carbureter, a carbureting chamber having a mixture outlet and main airninleti means of constant size regardless"of suction and a fuel feed device extending into said carbureting chamber and having a fuel connection of constant size-regardless of suction, an outlet, a fuel passage from the fuel connection to the outlet, and air inlets leading to the said fuel passage at different levels between the fuel connection and the outlet, the said air inlets being normally sealed,

' under low speeds, by the fuel.

" ber,

norm-ally sealed by the fuel at low speeds and admitting air in succession under high speeds.

5. In a carbureter, a carbureting chamber I having a mixture outlet and main air inlet means, a constant level liquid fuel chama fuel feed device having a connection with said liquid fuel chamber of constant size regardless of suction, an outlet above the established liquid level, a fuel passage from the fuel connection to the outlet, and

an auxiliary fuel chamber associated with said fuel passage, and having holes leading into said fuel assage at different levels below said liquid fuel level, air being admissible to said chamber and said holes successively permitting the passage of air into said fuel passage as the fuel, level in'said auxiliary fuel chamber lowers response to suction on said outlet.

, 6. In a'carbureter, a carbureting chamber liquid fuel chamber of constant size regardless of suction, an outlet above the established liquid level, a fuel passage from the fuel connection to the outlet, and an auxiliary'fuel chamber associated within said fuel passage and having holes leading into said fuel passage at difierent levels below said liquid fuel level, air being admissible to said chamber andsaid holes'succe'ssively permitting the passage of air into said fuel passage as the fuel level in said auxiliary fuel chamber lowers in response to suction on said outlet.

7.In acarbureter, a carbureting chamber having a mixture outlet and an air inlet of constant size regardless of-suction, a constant level liquid fuel chamber, a fuel inlet for said carburetin chamber, an auxiliary fuel chamber fed fi'om said constant level liquid fuel chamber through a passageway of constant size regardless of suction and feeding said fuel inlet, saidauxiliary fuel chamber having air admissible thereto, and a plurality of passageways through each of which air may pass to the fuel inlet, the liquidfuel in said auxiliary fuel chamber by sealing action and by its level determining the number of said passageways through which such air passes.

In witness w ereof, I hereunto subscribe my name this 18th day of August, A. D.

D-McRA LIVINGSTON.

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