US1305744A - Carbureter - Google Patents

Description

erta

LEGNARD H.- B'HQADS, 0F l i l' V CHICAGO, LLNOIS, ASSGNOROF ONE-HALF TO HOWARD i zinns, or enfonce, Immers.

eensnnnrnn. l

i ggzgtg Specification oiLetters Patent. Patented June 3, 1319i,

To all whom it may concern Be it known that L'LEONARD H. Rroiins, a citizen of theUnited States, residing at Chi- ,cago, county/of Co k, State of illinois, have inventedfcertain new and useful improvements inCarburet, rs, of which tlie following is a specification. 'This-invention relates vto carbureters ifor use in connection niith internal combustion engines. l'

@ne object of the invention is the provision of a carbureter of simple and rugge "c nstrnction and capable of being produced at relatively low cost which is at the saine time positive and efiicient in operation.

Another object is the provision of a carbureter adapted tov insure a homogeneous mixture of the charge at all engine speeds.

@ther obectsl more 'or less incidental to the foregoing will appear in the following description in which is set forth, in connecnection with theaccoinpanying drawings, a preferred'forin of construction for the purpose of explaining the nature of my improveinents. ln' the drawing- Figur@ 1 is a vertical sectional view througli my improved carbureter. Fig, 2 is an enlarged elevation of the loutterfly throttle valve and cooperating p arts. Fig. 3 is a section on the line 3-3, Fig. 2. Like reference characters denote corresponding parts in both views.

ri'he reference numeral 1 denotes a casing, which is preferably a casting, formed with a mixing passage that has a flaring outlet s ection with a flange Q'to be fastened to the intakey manifold of the engine, the opposite end 33 of said casting serving as a hot air intake. The casting 1 is formed with a raised portion or boss t which is recessed to form aseat for the head of a plug or key and formed wit-h an opening 6 communi=` eating with said recessed port-ion 'and with the interior of the casting. A spray needle 7 has its non-pointed end slidably dieper-ged in the said opening '6 and formed with a square yrecess 8 to receive the shank of the key or plug which shank .is square in cross section to prevent rotation of said needle 7. tThe needle@- is threaded exteriorly and projects into the interior of the casting andits pointed terigination Lis capable of entering the moth lo the channel 10 formed in a Application tiled. June 9, 1916. Serial No; 102,6'ro.

nozzle 11 to forni a closure therefor, the said nozzle extending through an aperture 12 in the casting 1 and into the large opening and then through the bearing aperture 31 and into the float chamber 13 and being threaded into 'engagement with the boss 1st formed in the base thereof.

rThe nozzle 11 'and needle valve 7 are opei eratively connected by an oscillating butterfly throttle valve 15. rlhis throttle valve is .i l l formed with an axial 'passage 34e the upper part of' which is screw threaded for engagement with the threads of needle v alve 7, while the lower part of said passage receives the upper part of tlie'nozzle 11. The valve 15 is also provided at its lower side with a tubular stein 17 whic i surrounds the nozzle 11 and projects through the aperture 1Q in the lower side of tlie casing 1. An operating lever 18 is secured by clamping screw 19 to the lower end of the stein 17 and is provided with a ball and socket connection 21 through which it can be connected with a suitable control lever at a distant point.

The thrott e valve 15 is formed, preferably cent-rally with an air passage 16 which extends directly through the valve transversely to the plane thereof, the arrangement being such that the nozzle 11 has its upper discharge end and the needlevalve 7 its coperating lower end, in said passage. Also,asisindicatedinFig. 3, the axial, enlarged part of the valve 15 is cut away ou the outlet or rear face of the valve to form a passage 34 at points adjacent to the opening 1G so that when the valve '15 is in its fully open position the air has a free passage along the said rear side thereof and across the passage 34, so that. the air current sweeps over the upper, discharge end of the nozzle 11. On the inlet or front face of valve 15 the axial tubular' part thereof is cut away at the outwardly opening side of the valve axis iii a manner somewhat. similar to the outlet side of the valve, but at the other or iiiwardly openinflf side of the axis it is not so cut away, being on the contrary formed with a slight extension 36 which provides a baffle face 37 for the air when the valve 15 is in open position. As willreadily be seen, the action of the'ba'e 36 is to direct the air through the passage 16and over the dis-I,

can be passed is between the casting 1 and the top 29 of the float chamber. lVithin the float chamber is a standard 24 to which a horseshoe shaped cork ioat 25 is fulcrumed olf center, said float carrying the needle valve Q6 adapted for engagement with the seat 27 whereby the flow of the liquid fuel l through the elbow connection 28 is regulated in a well known manner.

In the operation of my improved carbureter the throttle valve preferably is set in its fully closed position for starting the engine, the .needle valve being adjusted so,

that it' is at this time slightly open but is near enough its seat in the end of nozzle `11 to have a substantial checking action on the discharge of gasolene from the nozzle. As the engine starts the throttle valve may be 'openedwith consequent increase in the engine speed. As the throttle valve is opened more and more of the air passes at the sides of the valve and less through the central air passage 16. However, the air moving adj acent the inletJ face of thethrottle valve impinges against the bafiie 36 and is deflected by it through the air passage 16 and over the fuel nozzle, thus picking up and viaporizing .the liquid fuel; This carbureted current or et of air is projected into the current of air entering past the outlet face of the valve so that the two are thoroughlv mixed, as will readily be understood.

Theii the throttle is then moved to its full open'position, while the batiie 36. acts somewhat. less effectively to deflect vair over the fuel nozzle, this deficiency is counter-balancedvby the effect of the air current along" the outlet face of the valve which. sweeps across the opening Si (Fig. 3) directly over one side of the fuel nozzle 11 so as to have a substantial suction and entraining effect on` the fuel. Thus, whether the throttle valve be closed, partially opened or fully opened, my improved construction provides for the passage of entering `air over the fuel nozzle at a velocity great enough to insure ent-raining of the fuel and effective carbu-* ration of the air. In the operation of the carbureter the throttle valve mostof the time will be in intermediate or partially needle 'valve and' permit a more free ent-ry l of the gasolene in order to maintain a properly proportioned mixture; and this is accomplished by the adjustment of the needle the throttle valve..

Itwill beV seen while the construction of my improved carbureter is simple and rugged, i-t nevertheless provides for maintaining a uniform-mixture under the various conditions of operation. It will be observed, too, that the arrangement of the valve operating lever 18 and its connections in the open space between the mixing tube casting and the detachable valve chamber contributes both to compactness and to the protection of the said lever and connections from injury or disarrangement.

That is claimed is 1. In a carbureter, the combination of .a mixing tube, a butterfly throttle valve mounted in said tube to control the passage therethrough, said valve being formed with an air passage extending transversely to its plane from its inlet face to its outlet face and with an air baffle adjacent said passage on the inwardly opening side of the inlet face of the valve, a liquid fuel conduit extending upward through the throttle valve and opening into the air passage thereof, and means for turning the valve.

2; Ina carbureter, the combination of a mixing tube, an oscillating butterfly throttle valve mounted in the mixing tube to control1 the passage thereof and substantially immovable axially, the said throttle valve being formed `with an air passage from its inlet to its outlet face, a liquid fuel conduit extending upward through the throttle valve and opening into its said air passage, a

-needlevalve above said fuel conduit to control the outlet thereof, said valve having a threaded engagement with the throttle valve and non-rotatable connection with the mixing tube, and means for turning the throttle valve, the said threaded engagement of the needle-and throttle valves being adapted to open and close the needle valve as the throttle valve is opened and closed, respectively. 3. In a carbureter, the combination of a mixing tube,` an oscillating butterfly throttle valve mounted in said tube on an upright-4 axis to-control the passage thereof, said valve having an air passage from its inlet to its outlet face, a liquid fuel ioa't. chamber attached to the under side of the mixing` tube withan intervening open space, a fuel conduit leading from the float chamber into ,valve which is incident to the turning of` me mixing tube and axially of the throttle `velve to the ail' passage thereo, and means arranged in the said space between the mixing tube and the float chamber for actuating the thiottle Valve.

le ln a earburetei, the Combination of a Vmixing tube, a butterfly throttle valve mounted in said tube toroontrol the passage therethrough, said valve 'being for'ined with' a tubular axial enlargement and with an air passage extending through said enlargement of the 'valve transversely to its pla-ne from its inlet face to' its outlet face and with an air battle adjacent said passage on the nwaiflly opening side of the inlet face of the 'Valve and the said enlargement being cut away adjacent said air passage on the outlet face of `the valve, a liquid fuel conduit cxtending through the axial enlargement of the throttle valve and opening into the air passage thereof, and means for turning'the valve.

ln testimony whereof, I have hereunto set myl hand anfl'axed my seal, in the countyl of Cook, State of Illinois, this 29th. day of llflay', A. D. 1916.

LEONARD H. RHOADS. [L s] ln presence of- ANNA C. Mince/m, J. F. llnnxs.

Images