USRE22962E - Carburetor - Google Patents

Description

3 Sheets- Sheet 1 Jan. 6, 1948. o. oswALD CARBURETOR Origifial Filed Sept. .28, 1959 N ME llrllllllrfllllvrlllllll 11/141;

Re. 22,962 Y 0., OSWALD Jan. 6, 1948.

CARBURETOR Original Filed Sept.-28,: 1939 5 Shets-Sheet 2 :5 Sheefs-Shet :5

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O. OSWALD CARBURETOR Original Filed Sept. 28, 1939 Fly. 10

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El... l--- :ziiV m Reissued Jan. 6, 1948 CARBURETOR Olaf Oswald, Honolulu, Territory of Hawaii Original No. 2,393,118, dated January 15, 1946,

Serial No. 296,967, September 28, 1939. Application for reissue February 11, 1946, Serial No.

32 Claims. (Cl. 123-119) This invention relates to carburetors, my purpose being to provide a device of this character which will accomplish automatically and according to engine speed the following objects:

AControl of fuel mixture.

BImproved volatilization of fuel. C-Increased weight of air-fuel charge. D-Cooling of'engine, and braking effect. E-Sudden acceleration.

FFuel economy.

M carburetor embodies many novel features of construction and combinations and arrangements of parts, all of which will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings- Fig. l is a view in longitudinal section through my improved carburetor, on the line A-A of Fig. 6.

Fig. 2 is a left end view (Fig. 1) of air cylinder 2 (reduced size) showing air ports 43 of air piston 4. 1

Fig. 3 is a view in horizontal section through my accelerator assembly which is indicated generally by the numeral 35.

Fig. 4 is a view in horizontal section through piston seat 70, illustrating air ports N.

Fig. 5 is a view in partial transverse section on the line G--G of Fig. 6, viewed as facing fuel bowl 16.

Fig. 6 is a view in horizontal section on the irregular section-line C-C of Fig. 1, emphasizing governor assembly l3, ports 67 of the mixing Valve piston I5, plug 33, idler assembly 34, accelerator assembly 35, and fuel inlet 32.

Fig. 7 is a plan view of the body 3!), illustrating my improved slide bar, jet casing, slide bar guidecover, primary air ports, blind ports (shown by dotted lines), and fuel bowl.

Fig. 8 is an enlarged plan view of my improved slide bar casing.

Fig. 8-A is a View in transverse section on the line 0-0 of Fig. 8.

Fig. 9 is an enlarged plan view of assembly of slide bar, jet casing, and slide bar guide-cover, showing the relative positions of slide bar discharge openings and jets in casing, the latter being the dotted circles.

Fig. 9A is a view in transverse section on the line B-B of Fig.9, with fuel jets omitted.

Fig. 10 is an enlarged fragmentary plan view of my improved slide bar, showing discharge openings 48. 7

Fig. 10A is a view in transverse section on the line D-D of Fig. 10.

Fig. 11 is a side view and a longitudinal section (enlarged) of spring 54 of slide bar guidecover 9, this spring being shown in Working position on Fig. 9A.

Throughout the drawings the numeral 2 designates my horizontal air cylinder, this cylinder having bolted to its intake end the choke tube I containing valve 40, and is bolted at its discharge end to the vertical flanges of central body 30 and mixing chamber housing 20. Cylinder 2 contains air piston 4 adapted to slide therein, piston recoil spring 3, piston coil compression spring 5. Air piston 4 is provided with end ports 43 opening into the central annular space 42 which communicates with central bore 45 through side ports 44. These end and side ports and the central bore are of area suificient to pass therethrough the maximum quantity of air required by the engine. Fitted into the open end of central bore 45 is wristpin 46 into which is inserted the threaded end of adjustable (longitudinally) universal joint 6, this member 6 being operatively connected to the end of slide bar 1'. Piston 4 is preferably fitted with the rings 41, but may instead be provided with several shallow compression grooves. A coil spring 5 in cylinder 2 exerts pressure on the piston 4 to hold it in idling position against the recoil spring 3.

Central body 30 and its fuel bowl cover 13 are cast or otherwise made to conform with the arrangement of chambers and other parts as follows: A fuel bowl 16 is provided in the body 39 and is equipped with a float 3| hinged to the cover 73 and having a valve which controls a fuel inlet 32 supplying fuel to the bowl so that the float operates to maintain the desired level of fuel in the bowl. The fuel outlet from the bowl consists of a main fuel duct 11 which is substantially horizontal and located below the liquid level in the bowl. This main fuel duct is narrowed to a slit at its intake end, and communicates with a plurality of parallel vertical jet feeder ducts 18 which are preferably out of transverse alinement with each other and in direct vertical juxtaposition with the jets 50 in the casing 8.

This jet casing 8 is centered on the longitudinal axis of the body 30 and countersunk flush with its upper surface, having guides parallel with said axis, the guide 49 being formed of the main body of the casing. The guides 52 are separately formed although with the same inner angle of slope as guide 49, the slots for the screws holding able, having countersunk heads on ,under side of 5 casing B. :Ihesejets communicate with upper or sliding-surface of sca'sing 8 preferably by r'neans of shallow'holes of diameter equal to the maximum discharge diameter of the jets selected. These I preferably employ, for the"purposeef neritrolling the outlets of jets; 50,-;my-improved slide bar 'I which is provided wit spears-"e538 outlet transverse alinement withpae eather. The;-relationship of openings 48 to jets 50 is preferably as illustrated in Fig. 9, the central opening A8 being in vertical juxtaposition with one cen'traYjet-EO and the two outer jets fbeing indicatedby dotted cir'cles.

Slide bar I is guided gerierally--"by-- the fixed upward thrust by its inwardly o3 cting portion surface trans bar 1- sritigly -a'gainst jet dis charge surf-ace of casing 8 and to automatically compensate for' -anywearof -the*s-li-ding surf-aces ofA 5 slide bar T and its Poa'si-ng 8. Guides' 52 --are adjusted -to an esisy 'i'itagainst bar I-,--tl-ie purpose beingto insiir-that the bar-Fsl ialhnot get-out-of control oralinernent in the event- 01 a meehanical failure-of the' 'springfl5 4.

"The centralibody afl has formed: in items-meal I5 opening upward fronrprirnar spot chamber8li beingasa d H and at exhaust poitllllforjconventional pipe or tubing connections respectivlyfwith a source of heat'anda'rne'ansbfdischarge. Projecting downward-from roof offhot sp t" hambr are 'riffl'es 'as illustrated in "Fig; 5:;Pro eetingfi1pward from floor cream g V ryfair m ni-war eorrespsndmg rifiles. Als'o"formed inttheibddy u -are blind ports 82,- *open*to' thefat'rriosphere'pn theifi'r' rder side preferably,"-their--function being to insulate employed to" nesignate fthe mixing "chamber ousing," thef lower 'ing5'l. b e ing fibmvertical ji'flang off housin 20 is, auxiliary f airf entry port (59. Pressed 1 into ports 1 I Fit'ted intof the -lower. portion er this such as aset se'rew. venture 2 r"- and part 1.5 are so formed and adapted that the low pressuieare'a is at "slide bar jet outlets. ,iAppro 'n'iate'ly"cenassure.

dto'fniovein mixi ngcnambeii ls; itsupperj'en 'b' rigl connected =m-thesentnruga1 gcvemor assembi -is by means '75 ition against nne t q s:withsth a semb ralh a d. a m-p st n is r b edto imi tionyam thisvmovethefulbowl Hi1 against over hea't ir'ig.

removable fl-lower fportionoflwhich is contoured tosffit piston "seat 10 and the"upperportionof'which communicates through side ports 56 with central annular jets are arranged in rows parallel to the longitudi- 1 0 c nal axis of easing 8 and preferably out oi -trans verse alinement with each other.

space 65 whence open into mixing chamber 16 or'passages are of proportions and aggregate area adaptd ta*pass 'therethrough the maximum fuel mi tuige requ ments of the engine. Piston I5 is d'd"with rings 68, but may have B ab y P allow grooves on each sliding "siii'fae'el The reference numeral 13 is employed to des- "i'gnate my governor assembly which is operatively fastened at its upper end to motor shaft 56 by means: ofl sleeve 2152* into-the open --'end of= iwhich :rsleevetelescopes thes'haft 6 l againstzthetension ofvspringz fillre Fo ethiskspi ing fiu rna'y be substitute'd a like-element of diameter approximately equal to the periphery ofchamber, L5 and extending verticallybetwenith 'top OffjPis'ton 1.15 and inner projection "f'lower 'nsnigts'l.

The reference numeral designates .theiiblower oriinpellerj'which is perj a ively fastend to motor shaft 56, this shaft'jp'a g" t iigh.upper housing II, and housing'll being"adapted for e intakemanifold connections at :This ;imvpeller. is adaptedeffect to the 'endv o c,empa c ting the fuel charge in u m t:thesen i ei;suct on theengine cylinders. H

Reference numeral In designates thexmiotor, which is basedrpnmpfofehousing; l;.l-;and ,adapted fo e i eicatcqnneetionwitn anz-ens nesoperated generator; 1- 1 This motor; is adapted; to operate at a speed in ratio proportionately greater thansany i v ;sn e or en i e-swea er;s ;an a cordingly -;t:he-armature-sand; fields thereof; are

preferably wound with wire of lower resistance m y; ew-sqns t nt wit h 7 quired znumbena of windings within the physio mi'ts of the arrnaaid: motor being preferablygof the type lenowmtogthe -al'izas series- 'I-fl 1-is motor qor equivalent -motive ipower,his essential to my invention because by itsioperative 'rnpeller 1-2 the +goyernor mixingirvalve 171315130111 I 5*:.t'he

I t o ztheapi tom iund r whichever ofj'rthe objects I and purnoses Qffthisf inYentiom-is thereby a atiq Wi i n ezsp e L maware th tetheriermsin fm tive:pow r might-abe adapted; o ctuate tha-aforesaid ele- 'ments, such power forrim 94 plied by gears and- =,s aft or-p l leys and belt-con- :as; could be s n nection with the engine, orbyj meansof; arr-exhaust driven ,turbine but myl motor has many specific advantages over suchubther sources of power, suchas (a) ease ofcontrbl tojcut'iout'l motor,

Other advantages obviously irrherent in' this parts to -wear and "become maladj-usted; (0) a miniii u'm' er noise" and vibir'ation, (d) simplicity and econdr'nyof installation.

Reference numeral 33 designates ai-plug's'crewed or otherwise properly passed through the fuel 'bowl cover I3 and extending below the liquid level in fuel bowl I6, this plug containing idler air duct 83, idler fuel duct 81, accelerator air adjustment screw 33, accelerator air duct 32, and accelerator fuel duct 3|.

Suitably connected to the plu 33 is idler mixture tube 34 which discharges into mixing chamber I6 through the duct 88 just above top of mixing valve piston l5 at idling position illustrated in Fig. 5.

Accelerator riser 36, suitably connected with the plug 33, forms operatively an integral part of accelerator cylinder 35 which is provided at its open end with the restriction or Venturi tube 34 into which opens mixture duct 93, Adapted to move in cylinder 35, against the tension of coil spring 39, is piston valve 38 having a central bore 95 communicating with side ports 35 opening into cylinder 35. For the recoil of the valve 38 I preferably employ the coil spring 31. The closed end of piston valve 38 is preferably fitted with a washer of some suitable material, as illustrated in Fig. 3, or otherwise mechanically adapted to form an air-tight joint when on its seat at inner end of the plug 31. Suitably connected to the plug 31 at its discharge end is the accelerator mixture tube 83 which discharges into mixing chamber I5 preferably through the duct 98, or which may be adapted and connected so as to discharge into housing II, or through individual connections at each arm of intake manifold of engine to which this carburetor may be attached.

It is obvious that it would be within the spirit and scope of my invention to reverse the relative positions of the series of jets 53 and the slide bar outlets 48.

To attain, among others, the objects hereinabove specifically outlined, my invention operates as follows:

Object .Upon starting of the engine to which this carburetor may be attached, idler assembly 34 draws fuel from chamber I6 through fuel duct 81 and air through air duct 86, the mixture then being drawn through the tube 34 and discharged into mixing chamber I6 through the duct 88 just above mixing valve piston I5 in the idling position illustrated in Fig. 5.

The main air supply enters choke tube I past the choke valve 43 and then through end ports 43, side ports 44 and central bore 45 of the air piston 4, and thence into the horizontal air cylinder 2, dividing beyond the cylinder outlet 4| into primary and auxiliary air supply. The primary air supply, upon opening of throttle valve 22, passes through primary air ports I4 and distribution air ports I5 and thence is drawn past the jet discharge openings 48 of the slide bar I, the mixture continuing upward through venturi 2|.

As the engine speed increases beyond idling due to the opening of throttle valve, the rotation of armature of motor I through its operative connections causes the mixing valve piston I to lift off its seat I0, thereby allowing auxiliary air present in port 63 to enter piston seat ports 1|, this auxiliary air then passin between central bore of piston l5 and its seat 73 and mingling with the'primary fuel mixture emerging from top of piston seat ID, the total fuel mixture then passing through side ports 33 and end ports 31 of piston I5 into mixing chamber l5 whence it is drawn upward by the suction of impeller I2 and through the impeller mixing chamber 58, thence passing through connections 53 to intake manifold of engine.

Pressure of the incoming air against and rush ing through air piston 4 causes this piston to move forward against the tension of spring 5, this movement being imparted to slide bar I by means such as the wristpin 45 and the universal joint 6. Such movement of slide bar uncovers progressively the discharge openings of jets 50 to the end that at any position of the slide bar the full discharge area of one jet or its equivalent in the partially exposed discharge areas of several jets shall deliver fuel into the air supply admitted by the throttle opening corresponding to such position of the slide bar.

Object B.Exhaust gases from the engine in passing through hot spot chamber 8I impinge upon and heat central wall 83 of the body 33 which contains the main fuel duct 'II. As this main fuel duct is narrowed toa slit at fuel bowl IE, only the fuel contained in said duct and in the'jet feeder ducts 18 is heated, the fuel in bowl I6 being insulated from the remainder of the body 33 by the blind ports 82 which are preferably open to the atmosphere on the under side of the body 30. The heat thus acquired by the downward projecting riflles of chamber 8| is transmitted upward to the corresponding riflles rising from floor of primary air ports I4, which heat is picked up by the primary air supply passing through ports I4. .The heat thus imparted to both the fuel and the primary air supply has the known effect of greatly facilitating the volatilization of the fuel to the end of a homogeneous and combustible fuel charge to the engine.

Object C.The weight of the fuel charge to the engine supplied by this carburetor is increased as compared with that supplied by carburetors of conventional design which heat all of the air supply or all of the air-fuel mixture because of two factors inherent in my said invention, i. e., (a) only the primary air supply is heated, the auxiliary air supply being at atmospheric temperature, (b) the total air-fuel mixture is compacted by the action of impeller I2.

Object DP-When for any reason during the operation of engine employing this carburetor the throttle is suddenly closed but with clutch engaged, the primary air-fuel mixture is cut off from mixing chamber I6, but the attained momentum of vehicle incorporating said engine then drives the engine, and therefore through its electrical connection with engine generator the motor I0 continues to actuate the governor assembly l3, thus holding the mixing valve piston I5 off its seat and enabling auxiliary air at atmospheric temperature to continue passing through the mixing chamber IE on its way to the heated cylinders of the engine, thereby cooling said engine and incidentally assisting in the engine braking effect upon said momentum.

Object .As is Well known to the art of carburetion, when the throttle is suddenly opened wider for purposes of acceleration an extra supply of fuel is momentarily required to offset the sluggish response of fuel in the jets because of the greatly lessened suction efiect from that theretofore existing around the jets. This condition is taken care of by my accelerator assembly 35. Under normal engine operation, and especially during idling, the partial vacuum existing in mixing chamber I6 holds to its seat on plug 31 the accelerator piston valve 38 against the tension of spring 33. Upon sudden opening of throttle valve, suction ceases upon seat end of piston valve 38, spring 39 pushes piston valve 38 off its seat, and air entersaccelerator Venturi tube means adapted to function in response to and in ratio with engine speed for simultaneously actuating means adapted for metering and controlling admission of the auxiliary air supply and for compacting the total air-fuel charge, this last-named admission-control means operating as well to simultaneously cool and assist in a braking effect upon the engine in response to attained momentum under closed'throttle valve.

5. In combination, in a carburetor, means for admitting and metering auxiliary air or other gas and total air-fuel mixture supply to a mixing chamber discharging into and adapted for connection with an engine intake manifold and operatively connected with a central body provided with air and fuel supply means, said first-named means being embodied in a perforated piston valve adapted to move axially in said chamber to control discharge from peripheral ports in a valve seat at intake end of chamber, said seat being provided with a throttle-controlled central bore adapted to regulate admission of primary air-fuel mixture supply.

6. In a combination, means adapted for guiding longitudinal movement and preventing lateral and transverse variation from operative contact position of a slidable member and compensating automatically for wear of the several slidecontact surfaces involved, said means being preferably embodied in a casing generally guiding the movement of said member and having on one side manually adjustable guides, a self-adjusting guide-cover extending over and down both sides of casing and adapted by its outer configuration and by flexible means confined between itself and outside of casing on one side to hold said slidable member operatively against fixed guide on one side of casing and main sliding surface of casing.

7. In combination, in a fuel-metering mechanism, a slide bar adapted by its vertical perforations for selectively controlling the outlets of a series of vertical fuel ducts in the horizontal slide-contact surface of a casing having on one side a fixed guide and on the other side transversel adjustable guides for generally confining said slide bar, and means adapted for aiding said guides in preventing lateral and transverse movement of said bar and for automatically compensating for wear of the several slide-contact surfaces involved in operative movement of bar, said last-named means comprising a guide-cover extending over and down both sides of casing and adapted by its configuration and by flexible means confined between itself and easing on one outer side to hold said bar in operative contact position against main sliding surface of casing and its fixed guide.

8. In a fuel-metering mechanism for a carburetor, in combination, means adapted for controlling the outlets of a series of vertical fuel ducts of varying discharge area, said means comprising a vertically perforated bar slidable along and guided by a casing containing said ducts and having on one side a substantially vertical fixed guide and on the other side transversely adjustable guides, and automatic means adapted for aiding said guides in preventing lateral and transverse movement of said bar and for compensating for wear of the several slide-contact surfaces involved in operative longitudinal movement of bar.

9. In a carburetor for an internal combustion engine, fuel-metering means comprising, in combination, a vertically perforated bar preferably of trapezoid cross-section slidable in a casing to control the outlets of a plurality of series of vertical fuel ducts of varying discharge area in horizontal slide-contact face of casing, the casing having on one side a substantially vertical fixed guide and on the other side manually adjustable guides for generally confining said bar, a guide-cover bearing against one slide edge of bar and a portion of duct-discharge surface of casing and extending over the top of said bar and down both sides of casing, said guide-cover being provided with an undercut projection which engages a projection or groove on the adjustable-guide-side of casing and having a longitudinal groove on its downwardly projecting lip on fixed-guide-side of casing, said last-named side of casing being provided with an opposing similar longitudinal groove, and flexible means confined between said longitudinal grooves and adapted to hold said guide-cover in its operative lateral and downward thrust against said bar and easing, said guide-cover being open for the width and length of said series of fuel ducts to permit vertical fuel discharge.

10. In a combination, automatic means for actuating and controlling movement of an operatively connected slidable element guided generally in longitudinal movement by a casing, said actuating means being adapted for proportionate axial movement in a chamber by utilizing the varyingly induced pressure and energy of air or other gas flowing through said means and chamher, said controlling means being adapted to coact with said casing to prevent lateral and transverse movement of said slidable element.

11. In combination, in a carburetor for an internal combustion engine, automatic actuating means operatively connected with fuel-metering means, the first-named means utilizing the pressure and energy of engine-suction-induced air or other gas flowing through a perforated piston adapted to move axially in a cylinder in response to and in ratio with said energy, the secondnamed means comprising a perforated slidable member controlling the outlets of fuel ducts, means for guiding said slidable member, the said guiding means comprising a casing provided with said ducts and having manually adjustable casing guides, a guide-cover adapted to hold said slidable member against guide on one side of casing and main sliding surface of casing, said guide cover being slotted over said slidable member to allow of fuel discharge through perforations in said member.

12. In a carburetor for an internal combustion engine, the combination of automatic actuating means operatively connected with fuel-metering means, the first-named means being adapted for utilizing the varying pressure and energy of engine-suction-induced air or other gas admitted therethrough to move in a chamber in ratio with said energy, the said fuel-metering means being embodied in a perforated slidable member adapted for controlling the outlets of fuel ducts selectively of discharge area generally in inverse ratio with said energy and guided in longitudinal movement by elements adapted to keep it in operative contact with discharge outlets of said ducts.

13. In a carburetor for an internal combustion engine, the combination of automatic actuating means operatively connected with fuel-metering means, the first-named means comprising a pis ton adapted to move axially in a cylinder in response to engine-suction-induced air-flow through its perforations and said cylinder, the second-named means being embodied in a perforated slide bar operatively connected to said actuating means andadapted' to -be guided-bye casing and a guide-cover; theguidemovenbeing adapted to holdsaidban-in operative contact against fixed guide and main sliding-surface ofcasing and slotted :on topto'permit-of fuel dis charge through said bar, the casing being-provided-with a plurality of series of fuel ductsof varying discharg areas adapted for control--selectively by' movement of said *bar.

'14; In a carbu'retorfor an'internal" combustion engine, the combination of automatic actuating means with fuel-metering meansythefirst-named means being embodiedin a spring-loaded airflow-responsive" perforated. piston adapted to move axiallyin a cylinderin ratio with thevelocity of engine suction' induced air-flow through its perforations and said cylinder, the secondnamed means being embodied -in-a-jetslide bar operatively connected to said piston and guided generally in horizontalmovement byacasingprovided with a pluraiity-of- "seriesof vertical ful ducts ofvarying"dischargearea'adapted for'vertical" alinement with jjEtSiiiT bar 'and" controlled selectively according to movementgo'ft bar, "and" a guide-:cover a'daptedto'jpermit' of fuel discharge from said jets and'to automatically"keepin -operativeijuxtaposition th eslidingjsurfac'esinvolved in such movement of slide -bar.

'15. In a carburetorfor an internal combustion engine, in combination, a central body having' a fuel bowl therein, fuel. and primary air heating means comprising ,a'hot-spot chamber'inthe hody adaptedifor conventionalconnections respectively with a source .oiiheat and discharge means, a central wan inthe body posi ioned in h p chamber ,and'fhav'ing a main fuel duct communicatingfbetween the bowl and a plurality of vertically extendingljet feeder ducts, primary air supply ports in the 'body adjacent to hot-spot chamber, means (for admitting and controlling totalandlauxiliary andprimary air supply, and means for directing saidprimary-air supply past the outlets .offlsaid vduc ts,,v.and means for measuri'ng andlcontrolling discharge of fuel and auxiliary airlsup'pl y containedin enclosingmeansopr eratively connected withsaidicentral body and adapted: for connection with. intake manifold, of engine.

16; In a carburetor, in combination, air and fuel'suppl'y means, automatic meansjior controlling discharge .of said fuel, means for heating. the fuel and the primary air supply, throttle-controlled primary air-tuel-mixture-supply means, andlautomatically controlled..auxil-iaryeair-supply means and total-air-fuel-mixture-supply mean-s.

17. Ina. carburetor, in combination, a central body having a fuelsuppiy and aplurality-of seriesiof fuel feeder ducts communicating with said fuel'supply, means for heating the fuel in said ducts and the primary air supply, meansfor selectiyelycontrolling. theiou'tlets of said, duct said control meansbeing mountedon said body and comprising a casing, a guide-cover, and. aper-v forated bar, saidibar' being slidable. inand nartiall'y guided by the casing which has on one side a fixed guide and on, the other sidetransversely adjustable. guides for generally confiningthe bar, theguidecover being adapted topermit discharge of fuel from perforations of bar and to hold said ,bar-inplaceclosely againstmain sliding surfaces of casing, said casing being provided with a plurality of series of perforations vin vertical juxtaposition with saidfuel feeder .ducts, an air-admitting cylinder containing means responsive to suction of engine employing carburetor for automatically actuating through operative connection said 'fue1-control*means, 'and;

amixingchamber operatively connecting said central'body and cylinder and adapted'foruconnectionwith intake manifold of engine, said chamber containing throttle-controlled primary air-fuel-mixture-supply means and power-actuated means for admitting and'metering auxiliary air supply and' total fuel-mixture supply to mix ing chamber.

18, In a carburetor for an internal combustion engine, in combination, a body having an air passage'therein, a-fuel supply bowl in the body, vertically extending jet ducts of varying discharge area communicating between the bowl and theair passage, a slide bar operatively connected with engine-suction-induced air-flow-responsive actuatingmeans-and adapted for controlling the outlets-of said ducts by progressive selection of'fueldischarge areain ratio generally inverse with airflow speed, and means for directing air-past thetacjhedto seat end of said chamber, said chamberat its discharge end being adapted for connection with intake manifold of engine, and meansoheratively connected with said chamber and body adapted for admitting and controlling total air supply and for controlling selectively, in response to speed of engine-suction-induced air-flow therethrough, the fuel discharge area in ratio generally inverse with said speed.

'20. In a carburetor for an internal combustion engine, in combination, throttle-controlled means for metering primary air-fuel-mixture supply and automatic means for metering and controlling admission of auxiliary air and total-air-fuelmixture supply contained in a mixing chamber having its discharge end operatively fastened to a housing adapted for connections with intake manifold of'engine and its intake end adapted for fastening to a central body provided with air and fuel su ply control means, the said automatic air-and-mixture control means being embodied in a perforated piston valve normally closing auxiliary air ports in the periphery of a piston valve seat in intake end of chamber and adapted to control discharge from said ports and to move axially said chamber by operative connection with a centrifugal governor on a shaft passing through said housing and adapted for power drive,

'21. Ina carburetor for an internal combustion engine in combination, a mixing chamber having its, discharge end adapted for connections with intake manifold of engine and provided with means for metering primary air-fuel-mixture supply and. power-actuated means adapted to control and meter auxiliary air and total-airfuel-m'ixture supply, the intake end of said chamher being adapted for fastening to a central body having an air passage therein, a fuel bowl in the body and 'jet ducts of varying discharge areaconnecting the bowl with the air passagaaslide bar controlling the outlets of the ducts, automatic means controlling the movement of the slide bar, and means for directing air past the outlets of the ducts.

22. A carburetor for an internal combustion engine, comprising, in combination, air supply means, fuel supply means, automatic engine-suction-induced air-fioW-responsive means adapted to move axially in a cylinder for actuating through operative connection a fuel-metering mechanism in operative connection with a central body provided with a fuel bowl connected with jet ducts of varying discharge area and means for admitting primary air supply past the outlets of said ducts, a perforated slide bar controlling the discharge fromthe ducts, and operatively attached to said body at its discharge face being a mixing chamber provided at such attached end with an auxiliary air entry port communicating with said cylinder and with a valve seat having a plurality of peripheral auxiliary air discharge ports controlled by a spring-loaded piston valve adapted to move axially in said chamber by means of operative attachment to a shaft adapted for power-actuation, said seat having a central bore adapted for throttle-valve control, the discharge end of said chamber being adapted for connection with intake manifold of engine.

23. A carburetor for an internal combustion engine including, in combination, total-air-supply-control means contained in a choke tube operatively attached to intake end of a total-airadmission cylinder containing an air-flow-responsive piston adapted by its perforations and otherwise to move axially in said cylinder in ratio progressively with air-flow speed therethrough, a central body operatively attached to discharge end of said cylinder and formed with ports adapted to permit flow of primary air supply past the outlets of its contained fuel feeder ducts of vary ing diameter communicating with the source of fuel supply, means operatively connected with said piston for controlling the outlets of the ducts, said duct-control means being guided in longitudinal movement by a casing provided with perforations in vertical juxtaposition with said ducts and flexibly held in operative contact position in casing by a self-adjusting guide-cover, the said guiding means being mounted on the said central body. and operatively fastened to discharge face of said body being a mixing chamber containing throttle-controlled primary-air-fuelmixture-supply means and power-actuated means for admitting and metering auxiliary air supply and ttal-air-fuel-mixture supply to said chamber, discharge end of said chamber being adapted for connection with intake manifold of engine.

24. A carburetor for an internal combustion engine comprising, in combination, total-airsupply-control means attached to intake end of an air admission cylinder containing an enginesuction-induced air-flow-responsive perforated piston adapted to move axially therein, a fuel bowl and primary-air-supply ports formed in a central body operatively attached to discharge end of said cylinder, fuel ducts connecting said fuel bowl, with the primary air ports, means operatively connected with said piston for selectively controlling the outlets of the ducts, and operatively attached to top flange of central body being intake end of a mixing chamber having its discharge end adapted for connection with intake manifold of engine, said intake end of chamber 14 being provided with an auxiliary air entry port communicating between said cylinder and a plurality of discharge ports in the periphery of a. valve seat having a valvecontrolled central bore adapted to regulate admission of primary-airfuel-mixture supply, a piston valve adapted to move axially in said chamber to control said valve seat ports, and means operatively connecting fuel bowl with mixing chamber and adapted for inducing an idling fuel mixture supply in response to engine suction depending upon carburetor throttle position.

25. A carburetor for an internal combustion engine comprising, in combination, conventional air-intake-control means contained in intake end of a total air-admission cylinder having axially movable therein engine-suction-induced air-fiowresponsive means adapted to actuate an operatively-connected fuel-discharge-control mechanism in operative connection with and mounted on a central body having an air passage and a fuel supply bowl in the body and fuel ducts of varying discharge area. communicating with fuel bowl and air passage and said fuel-discharge control mechanism, means for directing the primary air supply past the outlets of the ducts, a mixing chamber operatively attached to central body and discharge end of cylinder and having auxiliary air supply means, throttle-controlled primary-air-fuel-mixture-supply means and power-actuated means adapted to control admission of auxiliary air and total-air-fuel-mixture supply, and engine-suction-responsive means op-' eratively connecting fuel bowl with mixing chamber and adapted for discharging therein an idling fuel mixture supply depending upon carburetor throttle position, discharge end of mixing chamber being adapted for connections with intake manifold of engine.

26. A carburetor for an internal combustion engine comprising, in combination, fuel supply means, air supply-control means contained in intake end of a total air-admission cylinder having axially movable therein engine-suction-incluced air-flow-responsive means adapted for actuating and controlling through operative connection the movement of fuel-metering control means operatively mounted on a central body having an air passage for primary air supply and a fuel bowl in the body and fuel ducts of varying discharge area connecting the bowl with said air passage, means for directing air past the outlets of the ducts, said central body being operatively attached to a mixing chamber provided with throttle-controlled primary air-fuel-mixturesupply means and automatic means responsive to engine speed adapted for controlling and metering auxiliary air supply and total air-fuel-mixture supply when engine is under load and for admitting only an air supply when acquired momentum of vehicle employing said engine is driving the engine with throttle closed, idlingfuel-mixture-supply means operatively connecting fuel bowl with mixing chamber and responsive to engine-suction depending upon carburetor throttle position, the discharge end of said mixing chamber being operatively connected with an impeller housing adapted for connections to intake manifold of engine and containing totalair-fuel mixing and compacting means embodied in an impeller adapted for power-actuation and to revolve therein at speeds in multiple ratio with engine speeds, a centrifugal governor operatively connected with said auxiliary-airsimply? I and -t taleair-fuel-mixt regs nplydr 4 mis ion; o n-clinici n 27;, A carburetor for; an internal combustion engine; comprising; in=- combinatiom fuel supply meansa air-'su plyecontrol means contained in air: supply;ia mixing-"chamber? operativelyat tached to: discharge- 'face *ofcentral "body and having aux-iliary-air-supply means communicating with theoperatively attached discharge end of-cyl-inderand meansadap'tedto meterand admit to'm'ixi-n'g chamber-the primary air-fuel mixture supply; discharge l'end i of *said mixing. chamberbeing provided with operatively connected poweractuated -meansadaptedformetering and 'con-.

trolling iadmis'sionof-rauxiliary 'air l and total air fuel mixt'ure charge; when engine. is under load and'for'? admitting onlyisan air 'supply when acquirecb momentum' 'of vehiele' employing "the intake-end-andhaving at said end an-i-auxiliary air entry port communicating 'with saidcylinder and with a pluralityof dischargeports in,-,.the; periphery of a piston valve seat having,a,-cen-1 tralzborecontrolled bya throttle valve adapted for manual control over the admission .ofprimary-vair-fuel-mixture supply, the said ports; beingadapted -forcontrol by a normally-closed; perforatedpiston valve axially movable inssaid- :chamberby means of operative connectionlwith a. centrifugal governor, the discharge end of mixing: chamber being operatively fastened to, an impeller housing adapted for connections with intake manifold of engine anclcontainingmeans-= ;adapted for finally mixing and compacting-thetotal-air-fuel charge to the intake manifold, said means being embodied in a conventional impeller adapted to revolve in impeller housing by reason of operative connection with a shat-t tenant engine-generator-speed-responsive motor, adapted to functionat a speed in multiplesratios,

with any given engine speed, and also operatively connected to said shaft and within the mixing! chamber being the said centrifugal governor,

. meansladapted to supply an idling fuel-mixture "supply-responsive to engine suction depending engine is driving :said engine .with throttle valve closed; an impeller h'ousin'g operativeliylattached to discharge en'd ofimixing chamber and adapted for monnections with intake i'manifold" of engine and containing total'-*air'=fuel-"mixing and fuel charge compacting means embodied in i an imr-j PBHIGI'fii-diiiDliBdlJO' revolvein thehousing at a speed ins-multiple ratioiwith an given enginei speed by reason of its" operativeaconnection"witlisaid power=actuated means,- :id1ing air fuelemixturesupply'wmeans 'operati-vely: conn'ecting fuer bowl with --mix-ing chamber and *responsive I to? engine atmosphere depending: upon sudden-"throttle openingn 281 A: carburetor for an internal combustion enginecomprising, in: combination," total-air: supply controlmeans :-conta=ined-in a; choke tube' operatively r-attachedto intake endof an air admission ratedpiston operatively 'conneetingwith a per= f orated 7138,15 slidable in and 'guided by' a casinganda g self -adjustingguide-cover embodying a fuel-metering,- mechanism mounted on a central bodyhaving afuel' bowl therein, a main-fuel duct. communicating; betweenethebowl'-and -a pluralityfof,vertically ext-ending jet feeder ducts of. varying discharge areain vertical juxtaposicylinder containingan: air-flow-= responsive spring-loaded" axially-movable perfo upon carburetor'throttle position, said means beingembodied in a duct-perforated fuel and air plug operatively connected with said fuel-bowl and" mixing 'chamber, and sudden-throttleopening responsive acceleration fuel-metering, supply means embodied in a perforated pistoni valve normally closing against spring tension the'discharge end of a cylinder operatively connected with mixing chamber and the atmosphere, said valve being adapted to move axially in said cylinder.

29; In combination with an internal combus tion-engine carburetor equipped with an impeller in operative combination with the other means as-and for the purposes illustrated and described in this specification including air and fuel supply means, engine-suction-induced air-flow-respon-' sive fuel-discharge-control means, means forconductingprimary air supply past the fuel-= ply andior improving homogeneity of and com-- pasting total-air-fuel-mixture-charge to the intake manifold, electrically operated meansadapted for connection with electrical system of engine and operatively attached to and adapted for actuating the said fuel-mixture- 'compacting means at a speed in ratio with and tion with,fuelflperforations 2 provided in casing,-

the said bar, being adapted-to control seiec-tively' the ,birtl'ets of.,said ,perfonationaprimar-y ain entry ports connecting 1 discharge end (of cylinder with distribution air ports, adapted 1 to pass primary air, around fuel .jetf. outlets-, means adapted-for greater than any given engine speed.

30. In combination with a cylinder having auniform major bore portion forming shouldersrespectively with a minor bore inlet portion and a minor bore outlet portion, the inner ends of said bore-portions bein in open communication, aperforated member slidable in said major bore portion against resilient means normally urging-said member toward said inlet end shoulder;

the perforations of said slidable member being improving. air-fuel-mixture. combustibility -embodiedin a. hot spotchambenin the body formed with conventional corrugations orvriflles-in open communication a between, exhaust manifoldand adapted to provide means of communication between said minor bore portions and topass therethrough at all times and at any position of'said member a pressure-induced flow orgassubstantially satisfying the volumetric capacity exhaust pipe.v ofengine, conventionalmeans of. said minor bore outlet portion and to move axially insaid major bore portion in-response to and in ratio with speed of such flow.

31. In a carburetor for an internalv combustion.

engine, in combination, a cylinder having a uniform major bore portion forming shoulders with a. minor bore inlet portion and a minor bore outlet portion, a fuel-discharge-control means operatively connected with automatic actuatin means, the last said means comprising a perforated member in said major portion and adapted to pass through itself at all times and at any position in said cylinder a pressureinduced flow of air or other gas substantially satisfying the volumetric capacity of said minor bore outlet portion and to move axially in said major bore portion in response to and in ratio with speed of such flow.

32. In a carburetor for an internal combustion of such flow.

OLAF OSWALD.

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