US1683634A - Carburetor - Google Patents

Description

Sept. ll, 1928'. i 1,683,634 P. TAYLOR r CARBURETOR Filed Jung 10, 1922 50. isabutterfly or choke valve 19.

Patented sept. 11, 1928.

UNITEDsTATEs i 1,683,634 PATENT orrlcn.;

WILLIAM r. Y'rAYLoRyoF BUFFALO, NEW YORK.

GARBURETOR.

Application filed June 10,

My invention relates to improvements in carburetors, and is concerned more particularly withthe means for automatically controlling the` supply of gasoline. One of the `objects of myl invention is to provide a carburetor in which the fuel-supply opening is controlled by afuel valve, and this opening reduced in size after the engine, to which` the carburetor is connected, reaches a pre-determined hi h speed.

Another object of my invention is tor provide a carburetor with controllingr mechanism whereby the speed of the engine to which the carburetor is connected may be limited to any desired degree. i 1 'i lViththe above and other objects inview. to appear hereinafter, theinvention consists in the novelfeatures of construction and in 1 the arrangement and combination ofparts to be hereinafter described and more particularly pointed out in the subjoined claims.,

In the drawings: 4

Fi 1 is a central vertical section through a car uretor, showing my invention embodied therein in what I now consider its lpreferred form. l

2 isa plan view of the carburetor.

I have designated the carburetor, considered as a whole, by the numeral 7, and'in the `selected typeshown, it is combined witha gasolinefcontainer 8. The carburetor comprises a casing 9 extending diametrically across the top of said gasoline container and a cylinder 10 surmounting the carburetor caslug 11 thereon. The intermediate `portion of. thecasing may be considered the carbureting chamber, which I have designated by the numeral` 12, and this chamber is separated from Vthe interior of the cylinder '11Vby a wall 14 1 in which a rotatable valve 15 is located having an openingor port 16 therethrough. Then said opening or port 16 is in 'normal position it serves as a-suction opening and connects the carbureting chamber 12 with the interior of the cylinder 10.. f f

17 designates the inlet of the carburetor. casing, and 18 the outlet' thereof. Wit-hin the 4carburetor casing near the inlet17 thereof The rotatable valve 15 is located in the wall 1 4, and ithas a shaft or stem extendingA out through the side of the` carburetor to` which al lever 21 is secured,the free end of which is pivotally connected to one end of a link 22', the opposite end of which has pivotal ingand having an inwardly-extending stop- 1922. serial No. 567,376.

connection with the actuating lever 20 on the 2 7, and in this depressed portion a` gasoline well 28 is arranged, said well opening directly into the carbureting chamber 12 and being in communication with the interior of the gasoline container 8 by a passage 29, preferably flaredat' the well, asatO, for a purpose to appear hereinafter. The gasoline within the gasoline container 8 is maintained ata constant level by a float 31 in the usual manner. The upper end of the cylinder` 10 is open, and adapted. for vertical movement in the saine is a piston32 .which ,is hollow and preferably inthe form of an inverted cup.

Screwed axially-through the head 33 of saidpiston is an externally threaded sleevev ,34, which may have a flanged lower end'within the piston and a polygonal upper end outside of thepiston` adapted to have a .wrench or other tool applied thereto for rotating said sleeve and adj Listing the same within fthe head of thenpiston Screwed onto said sleeve is a lock nut 3 5, which bears against the upper face of the piston and is adapted to lock the adjusting sleeve in adjusted position. The bore of said sleeve is threaded anda needle orffuel valve 36 is arranged adjustably within said threaded bore, saidvalve having asliding fit through thewall 141 separating the cylinder from the carbureting chamber 12. The upper end of this needle valve is .provided with a-lrnurled head. 37by means of which the valve ma beadjusted, the lower endof said valve being tapered or pointed, as at 38. The peripheral face of this pointed lower end `is adapted for co-action with theliared face 30 at the upper end of the passage 29. so that aminute adjustment between said flared face and the. pointed lowerV end ofthe valve may `be effected. 1

Interposed between the iiangedlower end of thejsleeve 34 and thewall 1-1 and surroundlngjsaid .needle valve is acoi'lspring 39 which serves to maintain' the` piston, atfits highest point against the stop lug 11.

. As it may be necessary at times, and particularly in cold weather, to close or partly to close the suction opening IGthrOughsaid rotatable valve, which will, in such cases, preventtbe loweringof the needle valve for the purpose ofreducing the supply ofgasoline to thecarbureting chamber until after `the en- Hginehas 'been started and the choke valve Vagain opened. 1

When first adjusting `the carburetor for use, the needle valve 36 ismoved into la position `to allow gasoline to be yfed in'toQthe well 28' where it ismaintained at the level of the ygasoline in the container' 8. This adjustment ofthe needle valve may, by chance, be proper for effective operation of -the engine, but whether or notsuch is the case,`can only be determined by running the engine under different conditions, `the pumping action of which will create suction within the carbureting chamber and lift the gasoline from the wellQS. The gasoline in the well will become consumed andthe natural flow `ofgasoline through thepassageQQ will then provide sufficient fuel at the outlet of said passage to keep the engine running. While the engine is running, the throttle valve 23 is opened vto permitthe engine to attain the speed which maybe desiredfor ainaximum, and avitlrthe spring compressed under these conditions-the fuel valve will be adjusted to feed the least amount of fuel for .satisfactory operation. If the adjustment of the spring is not proper for the desiredmaximumspeed'of the engine, the adjustment of this spring is made at this time, and when speeding the engine to the ldesired point, it is found that the piston 32 is' moved'downwardly to a degree yto slightly close the outlet of the passage Q9, the' pressure of the spring will be determined.` Clos? ing the Vthrottle valvefor idling of the en gine, or for slow speed, will result in thepiston rising and the fuel valve opening the ontlet ofthe passage29, and lunderthese conditions the proper supply of gasoline will be furnished iniaccordance with the depression inthe carbureting chamber.

It is to be understood that the sleeve 34: may be rotated to adjust the compression of the spring 39, and that ythe needlevalve 36 may be'adj usted independently while holding said sleeve againstA rotation,` thus making it easy toieifect any desired adjustmentof the spring independentlyof Athe'ne'edle valve, or any Vdesired adjustment of the Vneedle valve independently of the spring.` Itwill be apparent tliereforethat when the needle valve is adjusted,the maximum speed of the engine will be at its lowest when the compression of the spring 39 is adjusted to least resistance,` and will be comparatively higher as the compression of the spring is increased; rthisibeing (lue to the fact that the greater the resistance the spring has to the downward movementlofthe piston 32, the greater will be the suction required in the cylinder l() to lower said piston, and as the depression in said chamber increasesfwithfthespeed of the engine and reaches a cci-'tain degree under normal running conditions",ithe piston willibe drawn downwardly and slightly close the myselfto the use of gasoline,since anylvola-f tile 4liquid suitable forthepurpose may be substituted therefor.

Having thus described my invention, what I claimis i l. A` carburetor having chamber, an air inlet and a mixture outlet, a cylinder in communication withsaid carbureting chamber, a spring-retained -piston insaid cylinder adapted to be actuated underl suction created within .saidcarburetingl chamber, a fuel valve aetuatedfby said piston, a choke valve in said airinlet, and `means operatively connected with said choke valve to close communication `between said carbureting chamber andcylinder when closing said choke valve.

2. A carburetor having an air inlet, a mixture foutlet, a carbureting chamber between the two and a cylinder separated from said -carbureting chamber by a) wall, `a rotatable Ivalve in said wall having azsuction opening therein, a piston within said cylinder, a valve connected to said piston to regulate the fsupply of gasoline to the carbureting chamber,

means for keeping said pistonlat the end of its movement in one direction, va choke valve f within said `air inlet, and operative connection between said choke valve and said rotatable valveto cause the suction opening in a carlnlretinp,rt

said rotatable valve to be closed when closing said choke valve.` U` i f Intestimony whereof-I aflixmy signature. VWILLIAM @PJ TMYLOR,`

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