US1352628A - Carbureter - Google Patents

Description

C. L. RAYHELD.

GAHBUHETER.

APPLICATION FILED SEPT. 15. ms.

1,352,628. r Patentodsept. 14,1920.

3 SHEETS-SHEET I.

C. L. RAYHELD.

cAaaus'ETEn. APPLICATYON FILED SEPT. 15, l9l6. 1,352,628. 'Patentedsept 14, 1920.

4 3 SHEETS-SflsET 2.

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C. L. HAYFIELD.

CARBURETER.

APPLICATION man SEPT. 15, 1916.

Patented Sept. 14, 19gb.

3 SHEETS-SHEET 3.

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PAT

CHARLES 1 .H-ASTFIELIRHOF GHICAGO, ILLINOIS,

Mr =\IUFAOTURING- coxvusmqsr, 01 cmcmm lLLINGIS,

Specification of Letters latunt.

Applicatieu filcrl September 15 (315. Serial No. 2%,381.

nunmr reference: nmrkedw thereon, w d pat-. of. fins specli matwn.

"fhifl invcniqon relates to an improved typa of liti'blliP-lifii'i' wherein. a1; automatic gmmfliing (means is provided beyond the J1. 3*1116 f the Gi'ilblllfitfil Logefiher :m'r nmzicnfiy coutl'oiled. air ink??? meu'ia in: w bring into upamticm 1m.

" fl 51 mm I :11] M..-

n m 311111 mm. mm :1? in -U proude. the 01.: Lie-z themfi valve, and with Lilrattle Va-3m nc=- beynmi ti) i-brnt .m 2W 05. m in? through sposeci m; valve fol admimng moi jet to gin-111 the air. v.l's g'gct', 0i a puretsr if iniezs mg ciznmbar am provided, each of. said inlets providd wit fuel nozz'ies t0 car-Exam" the nfvr uuiac-x 13h (thrcugh, and with 21', warms. dis m 4 a" the point of :mta'zmce 0f the air and fuel into the mixing chamber topether with mechanism be- )mnri the throttfe valve, which sonbxrois 121m Hm 1mm the mixing a amber adapted to normuliy ciuse the passage ii'rmn the carbu rater um? kc open afutomzm icaliy H exerted by the engine on which 1.. carbum'ter is used It i.. so an object of invention is) PlCW'itIH 2;, uu 'buretur (f-JIIStIHCfiOR embracjam; :1 (Emmi: chamber, dash p01; chamber in comnmnimlicm therewith, apisiion in. the dash 130E} chamber immutable by an automrmticafly apex-mixing all. valve which serves further to apex-am an auxiiiary air inlet intc;

. 1.. a tux/J i112 side of Hm mixing chamber as Well as to rcter, and l'urhqa'r pywix ied with Emma Imyond tho'thmttie valve Wh'zc 1 cont flow 01k in We from the mi? into an an nary mixing (ham duc- J: nm'nmlLy tn clii se we outlet of the mix A chamber Beyond Lin, thruttle valve (25cc mum-man 1 I n thg (j; z'awings jiguz'e i. a side olcvnsirm Hanan-- rate amhmfiying tion.

Fig. 2 22. sizniiur View of tha side thereof.

Fig. 3 is :1, cv'zizrzii sectional detail taken thx'ough the iovv'm end 01 the float; s'hamber of the carburetor Fig. iis an Lam. ad cen nrsll verficai sectier! taikcn 101: ,udimzi ly' thrrsu'rh the my buzrei-er with A broken away shown in 01:22 .ti'rm.

(unified, taken an line- ()f As shown in the drawings: The float; chamber am} mixingchamber of the) carburetor are 121st iz'xtegml with one :motimr, the. flout; chamber being denoted by the refer-once numeral 1., and the. r

chamber by the reference nun'wral i that )ortion of the casing connecting the two c embers cored out on its interior de noted as a whole by the reference numeral 3. An opening is provided'in one side of the mixing chamber 2, and attached thereon is a cored out casing 4, affording on its in tcrior an air inlet passage 5, and further pro vided with a dash pot chamber 6, at the lower end thereof. n adjustable ring seat member 7, is threaded into the upper end of the casing element 4, for an automatic air valve 8, rl id on a stem 9, slidabl mounted througi the'top wall of the das pot chamber 6, and at its lower end therein provided with a piston 10.

Mounted within said inlet passage 5, communicating with the interior of the dash pot 6, .is a fuel nozzle 11, having an apertured spray head 12, on the up or end thereof and provided with a tapered metering pin 13, projecting u wardly through the end of the nozzle 11. aid metering pin is normally impelled upwardly in said nozzle into closed position by a spring 14, coiled within said nozzle and seated upon a tubular member 15, which is secured upon and communicates through an aperture in said piston with the dash pot beneath the piston. Said metering pin 13, is adapted to be depressed to opcn the nozzle proportionately with the downward movement of the air valve 8. A flat disk valve 10", is slidably mounted on the under side of the piston 10, acting automatically as a check valve to close over an aperture therethrough when the piston is depressed and of course opening said aperture when the piston is elevated. A pipe line connection 16, leads from the lower ortion of the casing 3, which, as shown in ig. 4, is in communication with the float chamber 1, to said dash ot chamber 6, communicatin therewith. ormed in the casing por tion of the carbureter, is an inlet air passage 17, provided with an outwardly flaring air inlet port 18, as clearly shown in Fig. 6, and, secured from beneath through a threaded aperture in the floor of said inlet assage 17, is a tubular fuel nozzle 19. The 50w of fuel through said fuel nozzle 19, into the air passage 17 is controlled by a needle valve 20, on the lower end of a vertically slidable stem 21, which is impelled toward closed position by a coil spring 22, seated inthc recessed upper end thereof hearing within the recessed extension on the carbureter casing in which said stem is slidab lIy mounted.

he needle 20, is adapted to be adjusted to difl'erent positions by eleyating the stem 21, by means of.a short crank arm 23, which engages a notch in said stem 21, said crank being secured in a horizontally journalcd shaft 24, of the carbureter casing. A bell crank 25, is secured upon the outer end of the shaft 24, and one arm thereof isin a position to be contacted by a cam 26, secured upon a shaft 27, on which a. throttle valve 23, is mounted within the carburetor and provided with a throttle actuating lever 29, on the outer end of said shaft for actuating the same. A detailed description of the mechanism for operating the needle valve and its interconnection and adjustment of parts with respect to the throttle valve as well as the means for actuating the same for priming purposes, is not believed to be necessary in view of the fact that this is a well known construction in carburetors I have invented heretofore, and is shown in many of my issued patents, namely, No. 1,193,820, dated August 8th, 1916, No. 1,22%,207, dated May 1st,7 1917, and No. 1,224,209, dated May 1st, 191

Mounted within the mixing cha uber of the carbureter,is a cylindrical grid mixi member 30, through which the air and fue entering into the mixing chamber from the respective passages 5 and 17, is constrained .to pass. A butterfly valve 31, is )ivoted at the lower end of the mixing chum er 2, and is connected for positive operation to open position simultaneously with the opening movement of the automatic valve 8. For this purpose, a long yoke lever 32 is rigidly secured to the under side of said airvailve 8 at one end, and extends into the mixing chambtr 2, and is means of a link 33, with said butterfly valve 31. A coiled spring 3 1, is disposed beneath the air valve 8, wound about the stem 9, thereof, and acts normal] I to impel said air valve 8, upwardly.into c osed relation with its ring seat member 7. A shallow dish member 35, is spaced below the lower end of the mixing chamber to receive any excess liquid admitted into the mixing chamber or any condensation of the fuel within the carburcter which after being condensed would pass downwardly through the mixing chamber.

A bell-shaped auxiliary mixing main 36, is formed integral with the upper end 0 the mixing chamber 2, beyond the throttle valve 28, therein, provided with an attachiu flange 37, by which the carburetor is attached to the manifold of an engine. Secured across the upper open end of the bellshapcd casing 36, is a spider 38, and secured insaid s ider and extending downwardly. is a tu )ular sleeve 39, within which is slidably mounted a stem 40, having a poppet valve 41, rigidly secured on its lower end, normally impelled downwardly by a spring 42, coiled about said telescoping stem and sleeve to hold said puppet valve sculingly across the upper open end of the mixing chamber 2. Inwardly extending lugs 65 on the wall of the casing support the valve 41 in the lowermost position. v

A water jacket 43, is formed around the pivotally connected by ruiningel'nrrobm' 9, of the enrlnneLer, and is provided with an inlet ill, and an. outlet L5, ea; Sil.O'-ITl in Figs. A and A cover 46, is provided for the flour; el'nnnher 1, and has nvoked on the under surface thereof grow seizing levers *lr, which serve nornmlly melee-in the needle valve stem 48, which is slidably mounted in said cover, elevated from inletfnel supply passage formed in e passing-ed plug 4-9, connected on the lower end of the loot chamber. Said sienl '18, moves Within a long tnbnlnr sleeve 50, formed. integral with said plug 49, and ham vlug opal-hires in the lower end thereof, filn'ongll. which the 'i'hrhl mny flow intothe float chrunher as it enters from the axial passage through said plug A. hollow Lupin) xneln] float 51, is slidnbly mounted upon said centrally disposed sleeve 50, and s the level oi? fuel in the floral. chamber as, is adapted to elm-'ntel he gravity net'- levers 57, do res; the stem 18, -0 nse the en nee puss, e for fuel into the a ehnmbera. Said plug i9, is threaded io ionnorher lngg 7 whieh is ihremledinto the lower encl of float chamber 1, and is rovided with msnnges theretl'rrongh beneath the plug l9. [lhreaded into the lower end of said plug 52, is another Imssnged ping member 53, which serves to clamp an annular ring nmmlmr e, scarlingly on the lower end of the fionl: ehzunh'er fl, lowing an inlet pipe or fuel 55, connected into one side thereof. A screen 56, surrounds: illeiower end of Lhe plug 5?, within the poriion elo'ed hy the annular member 5%, through n'l, eh the lee]. inlmdueed throughthe sup ply e 55, is vonfimined f0 flow he'l'ore J. ss.in, zn rwsrrclly ion the float chamber through the gmfisng'es' prcwided therefor.

xi lever 534- is piroled in e, homing 5'1, on he cover hi, oil Lhe flout ehrnnher, and is edz-zpted to elevatethe elem (1.8, to lift the needle mine. from its sent end permit flooding of the carburetor {or pri ning purposes when desired. A. small circular pane of glass 58, is mounted in view aperture in one wall of the float chamber 1, to ascertain the level of fluid therein.

At one end of the carburetor within the casing member l, :1 long upwardly directed sfiundnpmpassug'e 59, is provided communicating infio the upper end of the dash pot chamber 6, and lending upwardly end branching laterally into the threaded eon- :oection or the rirg member 7. with the upper end of the or 1 I pi m fiO, is mounted, wilt-inn om. cored out paos g'e at one o of the u or end of the niixlng chumlower end a); said pipe projecting re v closely ndlneen'i; to Lhefloor of passage 17, the floorei; this eomnmnienlzion of. the par-se zure 17, the mixing ehnn'rher 10, being shghfly upwardly a e denofied by the reier once numeral 64!. and the upper end oi snid pipe 50, uoinniunieuterv into the hollshnped uni-homing ehmnher 3-56, beyond the lhroriiie valve "ll, shown in Fig 11.

The operation is as follows;

When the mot-o1 upon which Lhe CHllJlb rotor is athn'zhed is running, The air for ourlnnnlion is drawn inwardly post the :rir Valve 8, which z'rnlonmtienll r opens against the compression oi. its spring 3a, rind ulso serves to open: the holler-fly :rlve L 1, through the lovers 553 nnd 523. The fuel for Lhe mixture in sup .\lied through Lhe nnrin ll :1 11oz;- zle 1!), Wl'llCl'l reeei'v'm; 1L limit the: (:H: frorn he constantly open air po t if, 5 well are through the fuel nozzle ll, whirl! is OPff-llihl, due lo depression, or the new; 31111 n) downward movement or" the air valve 'lho snefiion .iz'rdneed lhrongh the nanlau: r by the engine 2' e not: tin. valve ill, np'ninssi' the (mop .1; its spring diqaorsorl in ,7 l elmnimr 2'36, beyond the lhrottle \tLiVu 121:1, allowing; the mixture which flows in :lmonnis do pendent upon the :Hljursbmenl oi the throttle Ab, post will wheel, to ihore hly internrix Within the nnxilim y zni.-.ir ohm-her 36, before passage into Like manifold of the engine,

For rery slow or ldling s1 oeds,lhe valve all,,l.\eyoncl. the throttle ,vnlre Q8, rnnmins .:]osed as well as the "fuel nozzle 1-l, .-md uir ifulrnxnf-n through the port 18, t t ,Lher \rilh nei flowing from the nozzle 1;), and the mixture flows upwardlythr ugh the hymno pipe 60, around the thruLtle valve and valve -11, inlo; lhe cnrhnreting ehumher 3o,

den ueeolorntion lOll demunlils upon 1,?

m as for inslance when L nddenly proch rater, causing an abrupt depression of the autonmtie air mire 8, which serves: to drivethe piston 10, don-*nwerdly in the dash pot, thereby earn-ring fuel under pressure to low upwardly through the tubular member 15, and. into the fuel nozzle 11, from which it is emitted thronglii the spray head 12, due to the depression of the tapered metering pin 13, by the air valve 8. The depression of the piston 10, in the dosh pot serves further to cause thefluid to backup through the pipe 16, into'the flout; chamber, thereby raising the level therein so that n momenta ry flooding of the passage 17, takes places by a, flow of fuel through the main nozvl'le 19. The long passage 59, formed in the casing 4:, communicating with. the dash pot 6, forum What might be iermed a omnpensutinp; air clu'rmber, it serves to relieve the vuennm effect on the upper side of the piston 10, n-"hon the some. is moved qniolri down wardly in the dash pot, and serves further to permit the p'ston to return rqpxwrrdlv ngoin by relieving the pressure on the upper 'ing of said air side thereof when the air valve 8, tends to close, The cylindrical grid member 30, within the mixin chamber, serves to break up possible stratification of fuel and air antering into the mixing chamber through the respective passages 17 and 5, thus insuring good carburetion.

The piston 10, of the dash pot 6, connected to the air valve 8, serves to prevent fluttervalve 8, to steady the same as well as the butterfly valve 31, in their various adjusted positions due to draft through the carburetor.

An adjustment of the carbureter may be effected by turning the rin seat member 7, to change the relative position thereof in the casing, so thatthe stress of the compression spring 34, upon the valve 8,. is changed, and this adjustment serves also to vary the time of opening of the metering pin 13,-of the fuel nozzle 11, with reference to the movement of the automatic valve '8. As already described the needle valve '20, for the main fuel nozzle, 11, is operated through a, cam and lever connection from the throttle valve, and an adjustment to change the' relative opening of the needle valve 20, with reference to movement of the throttle valve 28, is made possible by adjustment of the cam member'26, but since this is well known in construction in all my prior ty of carburaters, a detailed description tliz reof is believed to be'unneceaa'zy. V- I am awarethatfvarioue details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the )atent granted otherwise than necewitated y the prior art.

I claim as my invention:

1. A carbureter comprising a mixing chamber, a throttle valve therein, a fuel su ply nozzle adapted to supply fuel into i; e mixing chamber, an auxiliary mixing chamber above the throttle v'alve, a spider secured to the auxiliary mixing chamber, a stem secured thereto,

and auxiliary mixing chambers, a stem secured thereto telescopingwith the aforesaid stem, and a spring around said stems exertin a closing'pressure on the automatic va ve.

2. In a carburetor of the class described, a mixing chamber, an auxiliar mixing chamber communicating with it 1e outlet from the mixin chamber, a throttle valve in the mixin c amber, an automatic valve controlling t eiiow of mixture from the mixing chamber into the auxiliary mixing chamber after passage past said throttle valve, an air and fuel inlet means communicating with said mixing chamber and a byass communicating with the auxiliary min mg chamber and communicating with the air and fuel inlet means. I

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses:

CHAJRLES L. RAYFIELD.

'Witnessesf c (humans W. Hnmsffli. EARL M. Hummn.

an automatic valve adapted to cut off communication between the mixing

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