US1258787A - Carbureter. - Google Patents

Description

w.Y P. KmuER.

CARBURETER. APPLICATION man H;xs.1.xsn54 Paend Mar. 12, 1918.

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lUNITED STATES PATENT OFFICE.

wELLINGroN P. RIDDER, or JAMAICAQLAIE MASSACHUSETTS.

CABBURETEB,

To all whomv imag coment:

B e it known that I, WELLINGTON PfrgKiD- nim', a citizen ofthe United States, i" iding at Jamaica Plain, county of S'ui'olk, CommonWealth 'of Massachusetts, have invented fuel dischargev simultaneously with the 'increase of the suction. In starting the engine, particularly when cold', it is necessary to not onlyT increase the suction but to enrie'h' the mixture Apropel-ti onately so thatthe large will be delivered in a form best suited fon immediatcexplosion. It is also desirable that both' intake controls shall return to their normal low speed adjustment asfsoon as the engine is started. 'l'oth'e end ltherefore of providing a carb'ureter wherein the fuel and airiintakes may hc positively controlled to enrich or di'nil-iisli the mintureaccordingfto the needs of; the engineljhave devised my .present invention In this invention the normal and .i the. inereased'sucltion and Lhe.normal and the;.increased` fuel' discharge are controlled siniultaneo'uslylso' thutthe mixture may alw'ays be regulated V,eocorclinzgf ,to .thenee'ds of the engine- .,"Theyolume `of air admitted into the mixing chamber Aof the lcarlo'ureterv con'tiolled hy'ii Vadjustable .air valve hai'- ing' tivo'fefective' positions, one for vnormal loivf speed o r ttor very 'slowv idling and the other forincreased suction.` The quantity nel ,admitted controlledpby two indenitrolling the non inreasedn.- All inglejstem. which .isfadjuX ab e drsli-aiid4 constitutes s ubstfantil) y.; moving .party'of the 'f mechanism' vso that'hy its ,displ cement val l.' t .hev vaflves .are simultaneously Ted;` 'llliefuel is caused to travel a downd and up'iyard'path and' in Sits course 'is q .f atniied; ildritimately mixedwith the air ivhijchis .introduced in opposition tothe initial fuel flow. v

These and other features which will lappresent invention relate to the increase off the ther .controlling and effective i .Specification of Letters Patent. Patented M31'. 12, 1918. Application and February 1, 1915. serial No. 5,354.

pear more fully hereinafter are secured in the carbureter forming the subject metter of the present invention. `The construction and operation of my invention vvill be more fully Vdisclosed in the speciication which follow. In the drawings forming a part or'. that specification I have shown a carbureter which not only illustrates the rprinciples involvedbut isY in itself a 'form found satisfactory in use. Throughout; specification and drawings like reference numerals are correspondingly applied and in these dra-wings,`

Figure 1 is a vertical section through a carbureter in accordance with my invention, showing in full lines the air valve moved downward to act as af. choker in `starting andv in dotted lines the airvalve raised to idlingl position. a v

Fig. 2 is a section on the line 22 of Fig. 1,and l Fig.3 is a section on the line of 1 have indicated at 1 the cylindrical outer shell of a carbureter equipped with my im so provemcnt. The. shell 1 is I'deflected in'-` wardly at its .upper 'eiid to provide re-A stricted passage 2.for the mixture and ter- I minatesin an annular flange 3 With which 1 the intake to the engine'connec'ts. The de- 85 livery or" the mixture through the restricted passage 2 is controlled by the usual throttle valve 4L operated from the dash. A '.1

'Set within the shell- 1 is an air vintake sleeve The inner Wall of this sleeve is 90 vpreferably corrugated as indicated-at 6 to assist in subdividing the mixture andide'-v shell l and sleeve 5 define an annular space exhaust of theeng'ine. Seen redto thebaseiofthe :shell I'by sore or otherzfstenings is 'a.cas' t1ng'forni g, the base of the carhurethri lThejcasti-hg r formed-as a dished-*flangegat itsupp AThe flange-9 ii'ovides'afseat: v or 'an un? wardly opening' automatic 'a r j 'valve'` 1Q which is effectively disposedl to c'ntrolth. passage of'air from thelateral air-intake. 11 into thecarbureter; Theuir valvehlis a plurality' or portsz12 therethrough fortlie passage ofai'r. ci.; The yair valve is mountedfvonja stem`13 `which constitutes substuntiallythe onli1 movv made for heating; thecai-hureter fromr 'th' e ing part fof the carbure-ter mechanism.. The f lio lupper end, of the 'stem is guided in a tubular `guide 14.` The guide 14 has a plurality: of ribs 1 41 which are sweated or other- 4wise secured toy a' plurality ofV similar ribs .291' on a Venturitube 29 whereby to rigidly fix the" guide within the sleeveJ 5. `The tube v.29 is fixed Vwithin the sleeve 5 by a pluralityf of fi'ns 30which are sweatedv or otherwise i. ing' the tube, assistV with to subdivide'r the fuel.

- ably developed as spirals wherebyf` `a whirling action to the mixture.y `15 screw 1'5.

' 4secured to theinternal .corrugated wall of the-sleeve.` The fins in addition to securthe corrugations 6 y The `fins are prefer- 'to give e upper end of the :guide 14 is closed byy a cap The lower endvof-the ystem 131 is fast in a diskl, forming' a guide for said stem and also. acting as the movable piston of a dash potflj?, in which it reciprocates. The dash pot is formed asl a cylinder depending from thevbase of the casting and is effective with the piston 16 to prevent chatter of the air valve. VThe dash pot has a dust cover 18 through which the stem passes with a slight clearance.

The stem is' yieldably- Supported at this end by an adjustable 'spring mount, the nortendency of which is to support the so,

stem with the 'air valve slightly above its seat, as shown .in dotted lines, Fi 1,whereby to register correct idling posltion. The

' normal low` speed adjustment of the air valve is notindicated in the drawings, but it will be understood that for this position the air valve is disposed still higher from its seat. Similarly at high' speed the position of the Vair valve is still farther from through the rocker lever 27. This 4 fmg plunger 19, the head ofwhich bears its seat. All of these adjustments are se` cured by manually elevatlng the air valve spring mount may conveniently consistof afyieldl in itselevation relative to the screw when re eased. The spring 21 normally maintains the airvalve just above its seat. -The screw 20 permits an initial adjustment 'of the plunger for changing normal low speed ad'f ]ustme'ntof the valvestem.

The valve stem carries means for regulating the fuel discharge for both normal andincreased suction simultaneousl with theadjustment of the air valve. T .e fuel -is' delivered from the` fuel chamber 2'2 through the connection V23 to a port 24 chambered out near the lower end of the guide 14 and open to the bottom of the 'said port is controlled by float and the trunnirm `the pins 39 to receive the valve stem. The

for turning thereby 4 lThe downward movement discharge from the an upwardly o ening taper valve 25 on the valve stem. he taper valve has a slight clearance in the uide 14 at its lower end so that the valve c oes not contact the guide in any part of its movement. The valve 25 moves simultaneously with the air valve whereby to admit a quantity of fuel in of air delivered by the 'air valve 1n normal use.

The fuel chamber 22 has a fuel inlet 33. The admission of fuel through said inlet is controlled by a needle valve 34 having a seat'in a tapered plug 35 mounted in the inlet. To assist the needle valvein finding guide. The norma l i fuel proportion to the volume,`

its seat Vif displaced therefrom by vibration of the car, the needle valve is loosely 'supn ported from its float 36. This vmay conveniently be eflectwl by providing the stem of the needle valve near its upperend with a pair of spaced collar-s 37 and b ing the trunnon of 'opposed'pins V39 which engage said stem between said collanex The top wall of 'the top wall oli' the Hout is extended laterally and the trunnion is fastened to the -wallA whereby to space th 1: needle valve from the float and in substantial parallelism thereto,y

The ends of the trl nion have holes tapped therein to receive ews o r' other fastenings 40 whereby te pivot .the float to the chamber 22.

The upper, end of the valve sten; is guided with slight clearancey in a hole 4 2 .let through a two art cover for the float chamber. ne partfl oil the cover is fixed-to a wall of the chamberl and the other part 44 is mounted for covering and .uncovering movement relative to the chamber. The

movable part 44 l'mspa notch 45. at 'y one i e e to receive' a swingable friction locking member 46. The member-46 may conven` iently consist of a `pin having its free end bent down to frictionally engage `the top face of the cover part 44.

When'the air valvejisgmovednear to its fin` order to-proper'ly enrich the mixture. The -valve stemis' therefore morepointsasj indicated at 26. When the move down intoregist'ry 'w;'li ;hthefl port 24 permitting an increased owbf fuel.

carries the plunger 19 s'the air valve at'itactsas -a choker to increase the` `suction, as shown in threaded at one end movement in a, threaded soclretf,v 47- formed in a wall of the chamber 22 and flattened at one or-..

1s depressed, these attened portions` providi 3S for the float with a pair.

are cut awayla-djacent nu, of the valve stem* down and compresses' `the spring 2 1. This brin' :down close-to its seat so t 1 'lso full lines, Fig. 1. At the saine time the flattened portions 26 being in registry with the port 24 provide for an increased lov oit fuel to correspond to the increased suetion. As soon as the pressure on the stem is removed the spring automatically returns it and thus the air valve to normal. low speed adjustment andY carries the flattened portions'QG su ciently far up into the guide 14 above the lport 211 to render this increased loiv 'fuel valve ineifective.

vThe adjusting movements of the valve stein in its guides are ell'ected by a rocker lever 27 which is operatively Connected at one end with the Wheel or Within reaeh of lthe driver andA has a stud at its opposite end which engages in the groove of a collar 28 fast on the stein 13. 'i

In use', the correct idling position of the parts is thatsliown in dotted lines, Fig. 1,-

vvherein the air valve is disposed slightly above its seat and the increased Afuel llow valve 26 is positioned above the fuel intake port so as to be ineffective. With the parts in this position. the taper valve is elfeef:

tive and'` permits a normal fuel discharge. This fuel. loWs down along the stem 18 and sonne of it possibly reaches the air valve which acts as a spreader and directs it toits outer edge Where it is taken up bythe air' entering between said edge and the seat 10. In the main, however, the normal fuel dislcharge. is caught up by the-'air rushing up wardly through-the seriesfof ports 12- in the sligi hen 1t is desired to increase the suction,

valve-1Q- and is carried directly up lthrough the Venturi tube 29, indicated by the arrows.

ly below the fuel intake' Aport 24.

as in starting the engine 4when Gold7 the valve stem. is depressed against the tension of the spring 21 to cause. the air' valve t0 ino/ve downwardly so near to' its .seat as toV aetas a choker as shown in ull lines, Fig, 1. ,Thisinovenient of the stein carries the iatt'ened `portions 2G into registry `with the fuel' intake to admit an 'increased volume of fuel. .Part of this increased flow descends outo'the air valve which acts as a spreader. The fuel 'not -i'nnnediatel vl {alien-"up bythe direct air'A through the ports lie: is sucked down to llie'circumlerenie of the Valve Whore' lnv in y -present invention i:llerefore, the

inistuxeinay be lregulated z uajordinL. io the f.nrads of 'the engine at an) time without requiring that the .d1-iwi' make any further" v-iuljust ments than the simplemanipulation oi'vtlie conneetionto the valve steln'l'l. -All valves are mounted on this stein and it con* .construction oi'- niv device may obviouslyr be an air intake, a valve'stein, an iur valve a d lati'on on said stem, and in eansfor movni'g said stein to simultaneously fvalryftl'ie'posi The tube 29 preferably extendsmeans operable from the daishorg-mov to the needs of the'L engine.

to the position of the air valve. ot' tlievalve ing rel:

- said 'valves to'each other. 'l

.stitutes substantially the only moving 'parli oi' the earbureter mechanism. The fuelis admitted in. direct proportion to the intake ot air when 'the carburetor is set for normal ,lowy speed,. but the fuel flowv is'abnoxma'lly increased upon reducing the intake ofLair for inni-eased suction. The single air va'live controls the intake of air both for norma-l and inrreased suction andthe valves `afnil QG, which are praetieally a1-single construeq 75 tion control the fuel How for both positions oi the air valve. The yielding resistance ari l-raiugeinent against which the single valve two fuel valves all arranged in coai ial.

tions of' said ait` and fuel valves according to the needs of the engine.' 4g y 2. In 'a carbureter, afuel discharge d. an air intake in opposition` toeach. other' valve stein, an air valve andl tivo uelxvali-"es concenigricallv arranged'- on said ste1n,' and ing said stem 'to s iniultanemisly v'arylthe po tions ofsaid airand fue] "valves aeeor-din 3. ,ln cailuul'eteiga fuel. discharge an` an air intake, vali-fe stem. an air mlve faLS't'- onjsaid stein and moving thereu ingenti. ixideliundentl .-etii'cartiinav valves alined wil-lt` said air vali e and nim-ing Wi't.l1 sai, l l ster the fuel discharge acooi'din.

for regulating lil. ln, a Carlini-eter, easing av d isoha d anairy intake; .a

liin.said fcasi 1 1g, a a

. aid; 'easingianai toniovetherei 'tlrivltl' n. he oas .o its seaig, a vz lv'e on said'st nin, Coaxial' relation -tosaidair val=ve.aIIdad\- juste@ rei-niv@ to, al@ fan-discimrgaby the I 1 adjustment 'of said, stem, andinoans fha ad-l justing said stein to simultaneously, vary .tl 1 posities of said air and fuelva'lves rolas: tive to said air intakeand fuel discharge Without ehanging the relative positions of adj ust z said s 5. In a carburetor, a fuel discharge and an air intake, a valve seat, a valve stem, a valve fast on said stem to move therewith and having an idling position away from said -seat and a suction increasing position close to said seat, a valve on said stem controlling the normal fuel discharge and effective when said air valve is in its idling position, and a second fuel valve on said stem above said first fuel valve and effective to increase the fuel dischargeV when said air valve is in its suction increasing position.

' 6. In a carburetor, a fuel discharge and an air' intake,y aV valve seat, a valve stem, a valve fast on said stem to move therewith and having idling position away from said seat-and u, suction increasing position close to saidl seata valve on said stem controlling the normal fuel discharge and effective when said air valve is in its idling osition, a second fuel valve on said stern a ove said first fuel valve and\eii"cctive to increase the fuel discharge when"said air valveis in its suc tion increasing position, said valve stem confstituting substantially the only moving part of the carhureter mechanism, and means for returning saidstem to original position after eachV actuation.

7. In a carburet'er, a fuel discharge and an air intake,a valve stern, a valve thereon controlling said air intake, a fuel valve on said stem opening in one direction and controlling the normal fuel discharge, and a secondva-lve on said stem opening in the op osite direction to said first named fuel va ve and permittin an increased fuel discharge and normally ineffective. v

8. In a carburetor, a fuel dischar e and van air intake, a valve stem, a valve't ereon controllin said air intake, an upwardly opening ucl valve on said stem and controlling the normal fuel discharge, and a downwardly opening fuel valve on said stem ermitting an increased fuel discharge.

9. fn a carbureter, a fuel dischar e and an air intake, a valve stem, avalve t ereon 4controlling said air intake, 'an upwardlyA opening fuel valve on said stem and controlling the nm'malfuel discharge, and a downwardly opening fuel valve on said stem and permitting an increased fuel discharge,

and a yielding mount for said stem effective to return it to original position. after each actuation thereof. y

10. In a carbureter, a Vfuel dischar e and y ian air intake, a valve stem, a valve t ereon' c l ing said air intake,seid stem having a po controlling the normal fuel discharge andjhaving a'further portion nor- A:nelly ineectivegand becoming. eectivc when saidfirst fuel valve is ineffective to permit an increased fuel discharge.

11. In u. carburetor, a fuel discharge and an air intake, a valve stem, a valve thereon controlling said air intake, said stem having fuel discharge and an air fuel dischargey and an valve stem adjustably mounted said casvalves, thereon controlling respectivel a taper controlling the normal fuel discharge, and having a flat portion normally ineffective and becoming effective when said first fuel valve is ineffective to permit an in creased .fuel discharge.

.12. In a carburetor, a fuel discharge and an air intake, a valve stem, a valve thereon controlling said air intake, said stem having a downwardly tapered portion controlling the normal fuel discharge, and having a plurality of fiat portions above said taper portion normally ineffective and becoming effective when said first 4incl valve is ineffective to nermitNan iinreasecl fuel discharge, sait. `em constituting substantially the only7 moving part of the carburetor mechanism.

13. ln a carhurcter, a casing' having a fuel discharge and an air ii re, a single valve stem zuljustahly un intco. :n said cash upwardly opening fuel valve on said sem, and an upwardly opening air valve ou said stem below .fuel valve to rece. e and spread the downwardly delivered fuel., and

means fc yieldingly supliicrting said stem y 1n normal position.

14. In a Carlini-eter, a casing having a stem adjustahly mounted in said casing, valves thereon controlling respectively the fuel and air intakes, and adjusted by the movements of the stem to vary both the volume and the character of the mixture, and

Ameans for yieldingly supporting said stem at one end to normally maintain said valves open. 15. In a carhureter, a casino* having a fuel discharge and an air inta ze, a valve stem adjustahly mounted in said easing, valves thereon controlling respectively the fuel and air intakes, and adjusted hy .the movements of the stem to var,r hoth the volume and the character of the mixture,

intake, a valvev and a yielding mount for said stem at one A.

end to normally maintain said valves open. 16. In-acarbureter, a casing having a air intake, a smgle in an air valve and a supeposed fuel vave mounted in coaxial relation on said stem and controlling respectively said air and fuel intakes, means for adjusting said valve stern exteriorly of the` carbureter to vary the relation of said valves to said-intakes, and alspring providing a yielding' 1e-- 'sistance against which said stein wor-ks. l

17. In a carburetor, a casin having a fuel discharge and. an air inta e a valve stem adjustably mounted in said casing, the fuel and air intakes, and a spring yiel mgly supporting said stemV at one end, and Imeans for adjusting the tension of said spring.'-

18. In a carburetor, a casing .having a fuel discharge and an air intake, a valve stern having valves controlling respectively said intakes, and an auxiliary fuel control on said stein for increasing the normal discharge of fuel.

19. In a carburetor, a casin having a 21. In a carburetor, an air intake and a fuel discharge, an adjustable valve stein having a taper. valve controlling said fuel discharge, and having an air valve controlling said air intake and disposed beneath said fuel discharge, a second fuel valve on. said stemfor increasing the normal discharge of fuel, and a pressure operated device yieldably engaging said stein and effective to return it to normal position.

22. In a carbureter, a casing having a fuel discharge and an air intake, alined guides in said casing above and below said discharge, a valve stem adjustable in said guides, an air valve fast on said stem to move therewith within the casing between said guides, and a fuel valve carried by said stern and controlling said fuel discharge and adjusted relative thereto by the adjustment of said stem, said air and fuel valves eoaxially arranged on said stem.

23. In 'a carbureter, a cylindrical guide, a, valve stem adjustable in .said guide, an air valve on said stem, a fuel intake entering said guide laterally above said valve, a valve on said stein concentric with said air valve and controlling said fuel intake, and -Withl out contact with 'said guide, a second. guide for said stein aliued with said first named guide, an air intake below said fuel intake and deliver-infr in opposite direction to the initial flow of fuel, and a yieldable mount for said stein at one end.

24. ln a carburetor, a cylindrical guide, a. valve stein adjustable in said guide, an air valve on said stem, a fuel intake entering said guide laterally above said valve, a taper valve on said stem controlling said fuel in- Y take, a iiattcned portion on said stem for increasing-the normal discharge of fuel, a sec oud guide for said stein alined with said first named guide, and an air intake below said fuel intake and delivering in Opposition to the initial fiow of fuel.

25. In a carburetor, a casing having an air intake, a valve controlling said intake, a guide for said stem having a chambered portion communicating with a source of fuel and constituting a discharge portdischarging along said stem and in oppositionlfaild air intake, a valve on said stem concentric with said air valve andcontrolling said fuel discharge port, and a Venturi member surrounding said guide and carrying said guide and fixed to the casing. l

26. In a carbureter, a fuel discharge and an air intake, a valve stem having a conformation constituting two independent valve portions adapted to 'independently control said fuel discharge, an air valve on said stem, and means for' moving said stern to vary the positions of said air and fuel valves according to the needs of the engine.

27. In a carbureter, a fuel discharge and an air intake. a valve stein having .a conf0rmation constituting two superposed `coaxial valve portions adapted to independently control said'fuol discharge, an air valve on said stem, and means for reciprocating said 'stem to simultaneously vary the positions ofsaid air and fuel valves according to the needs of the en 'ne.

In testimony whereofI affix mysignature.

WELLINGTON P, KIDDER..

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