US1335430A - Carbureter - Google Patents

Description

w. A. EDWARDS.

CARBURETER.

APPLICATION FILED MAY I4, 1914.

' Patented Mar. 1920, I

ards

* ;i by 6% W. A. EDWARDS.

CARBURETER.

AIPLICATZON FILED MAY I4, 1914.

1,335,430. Patented Mar. 30,1920;

4 SHEETSSHEET Z.

gab N LE 'I m W. A. EDWARDS.

CARBU RETER.

APPLICATION FILED MAY 14, 1914.

1,335,430. Patented Mar. 30, 1920.

4 SHEETS-SHEET 3.

w. A. EDWARDS.

CARBURETER.

APPLICATION FILED MAY 14, I914.

Patented Mar. 30, 1920.

4 SHEETS SHEET 4.

, UNITED STATES PATEN'I ivics;

WILLIAM A. EDWARDS, or CHICAGO, ILLINOIS, assrelvon To rInnEIs v &. xnorr Ere. oo, or CHICAGO, ILLINO S, A CORPORATION or ILLINOIS.

CABBUIVRETER.

To all whom it may concern:

Be it known that I, WILLIA A. EDWARD?it 'a subject of the King of Great Britain, an a resident of the cit of Chicago, 111 the county'of Cook and tate of Illinols, have invented certain new and useful Improvements in Carbureter's; and I do hereby dean adjustment of the throttle by an operator is very seldom dependent upon the particular construction of the engine itself, but is rather a feature. depending upon the/capability of the carbureter for introducing fuel to the engine in ,the proper proportion and amount, simultaneously with a movement of the throttle valve. In a great many cases a motor has failed to pick up or accelerate within a sufliciently short space of time when a throttle is thrown to wide open position, and this is largely due to the lag of the carbureter mechanism, which permits a too lean mixture to flow to the engine before the various elements have adjusted themselves to the change in conditions.

This invention relates to an auxiliary fuel supply means for a carbureter whereby the sudden draftj through the carbureter occasioned by the wide opening of the throttle valve, serves to actuate mechanisms for introducing a charge of fuel to the mixing chamber of the carbureter under pressure and spraying the same in the path ofthe incoming air.

It is an object of this invention to construct an improved carbureter .e nipped with a plurality of fuel jets where y fuel may be introduced into the mixing chamber of the carbureter by aspiration,as well as forcibly sprayed therein under pressure.

It is also an object of this invention to construct an improved carbureter wherein a sudden movement of the inlet air valve thereof serves to force a charge of fuel into the'mixing chamber of the carbureter under pressure. 7

It is also an object of this invention to construct an improved carbureter having an Specification of Letters I Patent. Patented lIal 30, 1920 Application fileu May 14, 1914. Serial No. 838,425.

auxiliary fuel chamber thereon with a pie-- ton movable therein and connections between said piston and the valve on the carbureter to force the fuel from said chamber under pressure into the mixing chamber of the carbureter.

It is also an object of this invention to construct a carbureter having an auxiliary fuel nozzle thereinadapted to have injected vtherethrough a charge of fuel under pressure with an initial sudden opening of the throttle valve and continually supplying fuel 65. p

when the throttle valve is left in wide open position. 4

It is also an object of this invention to construct a carbureter having a usual inlet needle valve affording communication to construct a carbureter having a plurality 8 0 of auxiliary fuel inlet nozzles each adapted to introduce a charge of fuel into the mixing chamber with a sudden opening of the air inlet valve.

It is also an object of'this invention to j' construct a carbureter having an auxiliary fuel chamber adapted to receive fuel from. the float feed chamber of the carbureter and provided with a piston actuatable by the inlet air valve of the carbuerter to inject one 'or more jets of fuel under pressure into the mixing chamber with a sudden opening of 4 the air valve. t

It is furthermore an object of this invention to construct a carbureter equipped with a plurality of fuel inlet means to the mixing chamber thereof and with mechanism for introducing a charge of fuel under pressure through certain of said fuel inlet means. It is finally on object of this invention to construct a carbureter simple in adjustment and capable ofv rapid variations in the throttle adjustment thereof to insure an-immediate responsive action of the motor to which it is connected.

The invention (in a preferred form) is specification.

In the drawings Figure 1. is afront elevation of a carbureter embodying the principles of my invention.

Fig. 2 is a rear elevation. thereof.

Fig. 3 is a central vertical section taken longitudinally 0f,the carbureter.

Fig. 4 is a horizontal'section taken on line 4-4 of Fig. 3.

Fig. 5 is a fragmentary top plan view showing the air inlet valve.

Fig. 6 is a section taken on line 66 of F ig. 3 with parts omitted.

s shown in the drawings:

The carbureter casing embraces a float feed chamber 1, a mixing chamber 2, an air inlet chamber 3, and a dash gaot or pressure cylinder fuel chamber 4:. lommunication is afforded between the float chamber 1, and

the mixing chamber 2, through an offset chamber 5, on one side of the fioatfeed chamber, which communicates with an air passage 6, 1n communication with the mlxmg chamber, and on one side thereof. The inlet of fuel to the carbureter from the gasolene supply is through a pipe 7,'which is threaded into a plug 8, which is in turn threaded into a plug 9, which is itself threaded into the casing at the lower end of said chamber 5. Said plug 9,is centrally apertured to afford a valve seat for a needle valve 10, which, as shown, is provided with i a tubular stem'll, with a peripheral flange 12, thereon. Said plug 9, has a peripheral passage 13, therearound which communicates with the chamber 5, throughthe upper end of said plug '9, by means of a passage 14. Of course, suitable gaskets are provided between the various threaded members to prevent leakage therethrongh.

A spill cup 15, is partially supported in position by said plug 9, due to the clamping of aring member 16, integral with an extension arm 17, forming a part of said spill cup, said ring, 16,being clamped to the lower portionof the casing "beneath the chamber 5, by said plug. Said extension 17, is provided with a passage 18, therethrough,

which communicates with the peripheral passage 13, in the plug 9, so that fuel in the chambers 1, and 5, may flow downwardly through the passage 14, thence through the passage 13, and into the pars sage 18, in the spill cup member.

\ For the purpose of controlling the inlet of fuel to the float feed chamber through said inlet pipe 7, a float 19, is adjustably secured upon a stem 20, the lower end of which is enlarged and rests upon the outer end of a pivoted lever 21, which at its other or inner end, engages be'neatl-i said flange 12, on the needle valve element ll. Thus, as

:the level of fuel within. the float feed chamberfalls, the float descends and rests upon said lever-21-, serving to elevate the needle valve 10, to admitfuel when the ,level has arisen to a predetermined amount, when the weight of the float is removed from the lever, 21, a spiral spring 22,- coiled around said tubular element 11 of the needle valve, impels the same downwardly again into closed position. An axially apertured guide element 23, is threaded into a partition 24, separating the chambers 5,-and 6, thus aiford- .ing a guide for said needle valve element,

the portion 11, of which surrounds the same, and also provides communication between 'the respective chambers.

A spring thrust needlevalve 25, is mounted in .said chamber 6, and is normally impelled downwardly by a spring 25 to close the aperture in said element 23. Connected .85 air inlet valves and outlet valves are provided in the mixing chamber and are respectively denoted by the reference numerals 26, and 27, with a connecting rod 28, pivotally connected to each of said butterfly valves, serving to insure simultaneous operation thereof. The valve 27, which is termed the throttle valve of the carbureter is'keyed upon a shaft 29, which has secured at atpoint on the outer side ofthe casing an actuating throttle lever 30. lVIechanism is provided for insuring a proportionate opening of the needle valve 25, with the aforesaid valves 26, and 27, but inasmuch as this forms no part of this invention a brief description thereof will suffice.

An adjustable cam element 31, is secured on the outer end of said shaft 29, adjacent the lever 30, and bears against the extremity of an arm 32, of a bell crank, which is 'lug 35 which is. keyed upon said shaft 33.

so that actuation of said tubular member 34, will cause rotation of said shaft 33. In order to rotate said tubular member-34, coincidently with movement of the throttle valve lever 30, the other arm 36, of said bell crank is provided with a set screw 37, which bears against a cam 38. on the extremity of a shaft 39, extending through said tubular element. Accordingly, .when the lever 30, is actuated the cam 31, will depress the arm 32, of the bell crank, thus causing the other arm 36, thereof through the intermediation of the set screw 37, to thrust said cam element 38, to one side with a consequent pivotal movement of the tubular element 34, and a rotation of said shaft 33. Said shaft 33, at its inner end is pro vided with'an arm 40, which engages in a notch in the needle valve element 25, to. raise and lower the same with even a slight movement of said transverse shaft 33. l 1 0 when'starting the engine.

- cable 43, is pulled by the operator, the shaft The'upper end of said shaft 39, is provided with an arm 42, to which is connected a rod or cable 43, for manual actuation whereby the needle valve may be opened without opening the throttle valve in order to admit an over-abundance of fuel thereto When the rod or 39, is rotated, in the tubular element 34, thus causing a corresponding movement of the cam 38, on the lowerend thereof, which, bearing against the end of the set screw 37,

causes the tubular element to be slightly rotated with a consequent rotation of said. shaft 33, and opening of the needle valve 25.

A reducing plug or coupling 44, is threaded into the lower end of the float feed chamber and secured therein is one end of a pipe 45, which at its other end communicates in said dash pot or piston chamber 4. Slidably mounted in said chamber is a piston 46, connected on a piston rod 47 which extends upwardly into the air inlet chamber 3, and is there rigidly secured to a puppet valve 48. A spiral spring bears at one .of its ends against said puppet valve 48,

and at its other upon the partition between the respective chambers 3 and 4, thus normally impelling said puppet valve into closed position with the piston.in 'raised position in the dash pot cylinder 4.

The pipe 45, opens into chamber '4, above .the piston 46, which at all times prevents a vacuum from being formed above the piston 17 and also as therate of passage of the fluid through passage 45, is limited, a

' Said spill cup 15, s provided with an.

apertured lug 52, in the bottom thereof into whichis threaded a fuel nozzle 53, which projects upwardly into the mixing chamher of the carbureter, through a slot in the. air butterfly inlet valve 26. A hollow plug 54, having a peripheral passage 55, comv,municating with said hollow interior by suitable apertures,.is threaded into the under face-ofsaid cup 15,, in alinement with the nozzle 53, and by such threaded engagement serves to clamp therein a ring element 56, of a pipe 57, which is provided with another ring element 58, engaging around a peripheral passage 59, in-a hollow plug 60,

threaded into the bottom wall of said chainber-r4. Also communicating in said ring.

element 58,"is apipe 61, which leads up- .wardly and through the 'air passage 3, and

is there directed upwardly into the mixing chamber of the carbureter at a point above said nozzle 58. Thus it is apparent that fuel may flow to the nozzle 53, from the float feed chamber through the various pa's-. sages leading to thepassage 18, and, also from the chamber 4, to said nozzle through the various passages leading to the pipe 57 Fuel may alsobe admitted to the mixing chamber'through the pipe 61, which leads directly from the ring element 58, wherein' it is in communication with the hollow interior of the plug 60. An air inlet port 62, is provided in the'side walls of the chamber 6, to admit a flow 'ofair at all times when.

the throttle valve is slightly open, across the inlet of the fuel needle valve 25. Connected annular passages 63, are cast upon the casing surrounding the mixing chamber for the purpose'of water jacketing-the same if-desired, and tubularconnections 64'and 65, respectively, are provided for the pur-.

pose of attaching the inlet and outlet water pipes thereto. 1 The operation is as follows:

A certain quantity of fuel is maintained in the float feed chamber at all times by the automatic action of the float which serves to admit fuel thereto from time to time. of course the needle valve 25, is'raised from its. seat, thus permitting a How .of fuel therethrough to be mixed with air entering at the port .62, and likewise through the inlet air valve 26, the mixture then passing to the manifold of the engine.

This carbureter' is particularly adapted to supply a proper'and sufiicient'amount of fuel to the engine with a sudden opening When the throttle valve 27, is opened i of the throttle valve to enable the-engine to instantly accelerate or pick up. For this purpose an "auxiliary puppet air inlet valve 48, is provided, the valve stem of whichis connected to the piston 46, in the dash pot chamber 4, so that as the air inlet valve is suddenly opened, due to an excessive draft exerted by the engine as when the throttle valve is thrown wide open, the piston' is.

forced downwardlyflthus pressing on the to spurt upwardly under pressure through said pipe 61, which of course injects the fuel into the mixing chamberof the car-' fuel in the] chamber and causing the same a bureter. The fuel underpressure is also forced through the pipe 57,- and thenceupwardly through the nozzle 53, so that a plurality of jets of hydrocarbon are intro-- 'duced into the mixing chamber under pressure. The amount of fuel so forced through the nozzle '53 is considerably less than that forced through the pipe 61, owingto the smaller diameterof-the orifice in the former.

If the throttle valve is left open, of course the initial pressure in the dash pot chamber is dissipated with a cessation of movement of the piston, but the intense draft of the engine will serve to continue the fiow of hydro-carbon through the spray nozzle 53, which receives the supply from the passage 18, connected to the float feed chamber as described, and a certain amount will also be drawn up through the pipe 61, which receives its supply from the chamber 4. The piston 4-6, not only serves to inject a charge of fuel into the mixing chamber with move ment thereof but also has a dampening effect upon the auxiliary air inlet valve 48, to prevent fluttering of the same.

I am aware that various'details of construction may be varied through a wide range without departing from the principles i of this invention. I therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

1. Ina device of the class described a carbureter comprising a float feed chamber, a mixing chamber, an air inlet chamber, a dash pot chamber, a pipe connecting said float feed chamber and said dash pot chamber to admit a flow of fuel to the latter, a spray nozzle projecting into the mixing chamber, unrestricted passages connecting said spray nozzle with ,said float feed chamber, a passage connect-ing said spray nozzle with said dash pot chamber, an air valve for said air' chamber, and a piston adapted to be actuated thereby in said dash pot chamher to force a charge of fuel through said spray nozzle into the mixing chamber of the carbureter.

2. In a device of the class described a carburetercomprising a float feed chamber, a mixing chamber, an air inlet chamber, a dash pot chamber, an air inlet valve in said air inlet chamber, a piston in said dash pot connected to said air inlet valve, communication between said float feed chamber and said dash pot chamber to admit a flow of fuel to the latter, a spray nozzle projecting into the mixing chamber, and communicat ing with said float feed chamber, a passage connecting said spray nozzle with said dash pot chamber, and a second spray nozzle communicating with said passage, between said first spray nozzle and said dash pot chamber thus permitting a plurality of jets of fuel to be injected into the mixing chamber when said piston is actuated in the dash pot chamber.

3. In a device of the class described a float feed chamber, a mixin chamber, a dash pot chamber, a piston in t- 1e dash pot chamber, spray nozzles projecting into the mixing chamber and each thereof having connections with said dash pot chamber and with said float chamber, another connection between the float chamber and said dash pot chamber, and'means adapted to actuate said piston to force a charge of fuel under pressure into the mixing chamber of the device through said spray nozzles.

4-. In a device of the class described a carbureter comprising afloat feed chamber and a mixing chamber, an auxiliary fuel chamber, a piston movable therein, spray nozzles projecting into the mixing chamber,

auxiliary chamber independently of said plurality of hydrocarbon nozzles through which jets are introduced at different levels lnto the mixing chamber ofa carbureter by said valve and piston when a sudden draft of air takes place through the carburetor.

6. In a device of the class described a carbureter, a spring pressed auxiliary air valve thereon, a piston connected to simultaneously move therewith, a fuel chamber inclosing sald piston, and a plurality of spray nozzles communicating with said chamber to admit a charge of fuel therethrough into the mixing chamber of the carbureter at different levels when said piston is actuated by movement of said air valve.

7. In a device of the class described, a float feed chamber, a carbureting chamber, an air inlet thereto, a spring resisted valve for said'inlet, a fuel spray nozzle adapted to direct fuel into said carbureting chamber, a dash pot forming a part of said carbureter, a piston in said dash pot connected for movement with said airinlet valve so that downward movements of said valve impart a downward movement to said piston in said dash pot, a passage communicating between said float feed chamber and the upper portion of said dash pot behind said piston, and

a passage communicating between said fuel spray nozzle and said dash pot in front of said piston whereby movement, of said I piston by the air valve forces a charge of a piston in said dash pot operatively connected to-said auxiliary a r valve to rece ve movement therefrom, a passage communicating between said float feed chamber and said dash pot to convey fuel into the dash pot on one side of the piston therein, and

a passage communicating between said fuel nozzle and said dashpot, said passage'communicating-into said dash pot on the other side of said} piston whereby movements of said piston imparted thereto by movements of the air valve force a charge of fuel under pressure through said nozzle in excess of ythat which is withdrawn due'to the aspira- 7 passage communicating with said dash pct and said fuel supply nozzle, the openings of said respective passages into said dashpot being so situated with reference to said p ston'that an opening movement of said air valve operates the piston'to withdrawfuel from the float feed chamber and discharge fuel under pressure from the .dash'pot into said nozzle independent of and in excess of the aspiration eflect of the air passing sa d nozzle. J 'i 10.. In a carbureterof the class described, a float feed chamber, a carbureting chamber, an" inlet chamber for air, a dash pot chamber, apassage communicating with said float feed chamber and said ,dash' pot chainber to admitfuel from'thefloat f eed chamber to thedash pot chamber, a spray nozzleprojecting' into. the carburetmg chamber, means affording communication between sa d spray nozzle, said float feed chamber and said dash pot chamber, an air valve for "said air inlet chamber, a piston mounted in said' dash pot adapted when actuated to forcea charge of fuel through said spray nozzle into the carb1 etingchamben and'a Stern on which said air *valve and piston are mounted whereby saidpiston is moved in the dash pot duetothe same is moved. 111' In a carbureter of the class described, a float feed chamber, a carbureting-chamher, an. air passage leading to said carburetchamber, a fuel spray'no'zzle'situated to discharge into the carbureting chamber and subjected to the aspiration eifects of the air flowing through said air passage into said asuc'tion effect on said air'valve whereby Icarburetin'g chamber, an auxiliary air inlet,

a suction operated valve in said air inlet,

a sh, p f r a Part f Said a ur tea a piston in said dash pot 'operatively connected to said suction operated air valve/so asto be actuatedby said valve, a passage afi'ording communication between said* float feed chamber and said dash pet, apass'age affording communication betweenfsai'd float feed chamber, said dash pot and said fuel spray'nozzle, a throttle valve to eont'roltlie f 1 1 mixt r fiQ i t vb e iii mi her, and a valvecontrolling the flow of air hr u h s ai pa adi1 'g"t th 'arb'ureting chamber. i r

1 12111 a ea rb'ureter of the class described,

a fl fe d mb r, a armen; cham. her, an air passage leading to s'aid carburet-' ing chamber; a' .ifuel spray nozzle situated to discharge fuel nto the -ca1-b1irtingeham her and subjected to the aspirationefi'ectof air flowing" through-"said air passage to' said carbureting chamber, anauxiliary' air inlet, a suction o erated valve in said air inlet, a spring resisting movement thereof, a dash pot forming apart of said carbureter,

--.a' piston in said-dash pot, a stem connected to said pistonand to said aininlet valve to insure coincident operation of said piston said air valve, a p'assageafl'ording coinmunication between said float feed chamber and said dash pot on one side of said piston, and a passage, affording communication be tween said fue'lspray nozzle and said dash pot on the other side of said piston to permit a charge of fuel to be forced'through said nozzle into "the carb'ureting chamber in de p n t f and. in" xc s. f th' a pi ion effect of the air upon said fuel nozzle when the er rated alves cpsr d 6 thx t 'alcl pis on'd w rdly 1 a d dash A M --g Y I" i 3- n a bilreter 9f, the clas d ibed, a float feed chamber,a 'carburet'ing chamber,

a h vatio mm a 'parfla'f said a b tr' (h ing. a p t' t jthfia nsen i rssfiri t 'd 11 1 nozzle project ng into said "carliuretin ha ber; ap ifi er upplying airin say carburetin'gch'amber to utilize an'aspiration effect on said fuel nozzl,an auxiliary air P t; a ar a an lia y ir armanectio'ns between' said valve and "said piston whereby piston is operated when said valve is actuatedb'y suction through thec ar 1 ham aomdash-paadctmmu cations between said fuel nozzle and said hro gh a n z l nt idmrbu t n chamber with actuatio'n'oj the-auxiliary air 514 n f b ret 'r of the ass d b d, a carbureting chamber, a fuel supply nozzle to direct fuel thereinto, an air inlet assage to admit air into said carbureti g amber past said fuel nozzle, a butterfly "valve con i daish "pot whereby saidfuelmay be forced an auxiliary air inlet passage to admit air into the carbureting chamber, adash pot assoclated with saidca'rbureter, piston there- 111, means adf 'nittmg fuel to "said dash pot chamber, ',a communication between saidv dash pot chamber and sald fuel supply" nozzle whereby movement of the piston forces fuel under pressure into said carbureting chamber, and an air valve mounted in. said auxiliary air inlet passage and opera-' tively connected to the piston in the dash pot to operate the same when said auxiliary air valve is operated by suction in the carbureter.

15. In a carbureter the combination of a mixing chamber, a main fuel nozzle, float feed means for supplying fuel to the main fuel nozzle, a pump operated-by sudden m crease in suction in the carbureter to pro vide an extra supply vof fuel, the said pump being provided with a plurality of ducts havingoutlets in the mixing. chamber at different elevations so as to operate difi'erentially insupp'lying fuel to the mixing cliamber v a mixing chamber, a main fuel nozzle, a float feed chamber for supplying fuel to the main f-uel nozzle, a pump operated by sudden increase of suction in the-carbureter to provide an extrasupplyof'fuel, a passagev'vay connectingthe pump and float feed chamber-,- anauxiliary nozzle communicating with sa d passagewayyand zm auxiliary nozzle communicating directly with the pump.

17.' In a carbui'eter, the combination of a mixing chamber, a main fuel nozzle, a float feed chamber for supplying fuel to the main fuel nozzle, an air inlet valve, a pump operated by the air inlet valve to provide an extra supply of fuel to the mixing chamber when the valve is suddenly opened, a fuel passageway connecting" the pump and the 1 6, In a .carbureter, the, combination of float feedj'chambery and a fuel nozzle in the mixing chamber communicating with said passagei'vay intermediateof the 'pump and p the float feed chamber.

18. In a cai'bureter, the combination ofa mixing chamber having a main fuel nozzle,

an air inlet adjacent the main fuel nozzle', "a

plurality of auxiliary air passageways, a pump for increasing the normal supplyof fuel, and an auxiliary fuel nozzle supplied with fuel by said pump and locatd at the intersection of the said auxiliary air pas-i sageways. u 19. In acarbureter, the combination of a mixing chamber having a main fuel nozzle,-

a main fuel reservoir, float feed means for furnishing a normal supply of fuel to the main fuel nozzle, a pump piston for, aug'-' chamber inclosing the pump piston, said chamber being provided with a passageway therefrom at each side of the piston corn-' numicating with the main fuel reservoir.

'20. In a carbureter, the combination of a mixing chamber, a main fuel nozzle in the mixing chamber, a main fuel reservo1r,'fioat feed means for providing a normal supply of fuel to the main fuel nozzle, a pump p s ton, a cliamber'inclosing the said pump piston. and having a passageway therefrom at each side of the piston communicating with WILLIAM A. EDWARDS.

\Vitnesses v FREDERICK PURDY, LAWRENCE REIBSTEIN.

inenting the normal supply of fuel, and a

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