US1588667A - Carburetor - Google Patents

Description

June 15 1926. 1,588,667

N. ECKLES CARBURETOR Filed April 22, 1920 1N VEN TOR. NOBLE fc/(LES.

A TTORNEY Patented une 15, 1926.

' UNITED STATES 1,588,667 PATENT oFFicE.

NOBLE AEGKIIES, F ISAN DIEGO, CALIFORNIA, ASSIGNOR OF THREE-FOURTHS TO LEWIS W. RHODE, SAN DIEGO, CALIFORNIA.

CARBURETOR.

Application led April 22, 1920. Serial No. 375,691.

My invention relates to carburetors for preparing fuel for internal combustion engines and the objects of my invention are:

first, to provide a carburetor which is so constructed that the fuel in proper regulated quantities may be drawn from a tank on a lower elevation by' the vacuum created by the operation of the pistons in the cylinder of the engine thus dispensing with the conventional vacuum or pressure-systeml of fuel supply as used in the conventional automobile, or the like; second, to provide a carburetor in which a continuous partial vacuum of .varying degree is maintained in the fuel bowl at substantially all motor speeds and under substantially. all conditions thus causing the fuel supply bowl to be replenished at substantially all times by the partial vacu'um in said fuel supply bowl; third, to provide la carburetor of this class in which the operation of the carburetor and regulation of the proportionate quantities of fuel and air are entirely controlled by the relative degree of lpartial vacuum between the fuel supply bowl and the air supply passage which relative vacuum regulation is operated automatically with the operation of the throttle; fourth, to' .provide a carburetor of this class which'is adjustable throughout; fifth, to provide separate means for regulating the vacuum in the carburetor for use at low speed and idling; and sixth, to providea carburetor of this class which is very simple', economical of construction, durable, vflexible', eiiicient in its action, easy. to repair and install and which will not readily deteriorate or get out oforder.

With these and other objects in view asV will appear hereinafter my invention consists of certain novel features'of construction, combinatlon and arrangement of parts and portions as will be hereinafter described in detail and particularly set forthin the appended-claims reference being had to the accompanyin drawings and tothe charactersy of re `erencer thereon whichformv va part of this application in which:

' Figure 1 is aflohgitudinal sectional view of my carburetor '-throu h the middle thereof Fig. 2 is a'. sectiona view through 2--2 of Fig; 1; Fig. Sis a sectional viewthrough op 3-3 of Fig. 1; Fig; 4 is' 'a top yor -plan view of a fragmentary' portion of carburetor 7, throttle valve 8, `drain conductor 9, 10Wv l speed fuel feed 10, relative vacuum regulating-valve 11,and fuel conductor 12 constitute the principal parts and portions of my carburetor. j The main Vcasing 1 is substantially a conducting tube functioning as van air conductor. It is provided with a dip portion forming a bowl 1a surrounding vthe fuel inlet nozzle 1c into said casing and provided with a downwardly extending web 1b therein for guiding and deiecting the air downwardly past thefuel inlet nozzle 1c. This casing portion 1 is provided with an inwardly projecting portion 1d in the one side thereof which is provided with anarrow slot 1e therein shown best in Fig. 3 and mounted over this projecting portion ldin said casing is an. intermediate regulating valve 7 which is supported in the wall of said'casing and providedwith anextended portion 7 extending out through 'the one side and mounted onl this extending portion ia is an arm `membery 7b for operatin said valve 7, which is for the purpose -ocontrolling or increasing the suction in the air passageway ,in the region of the nozzle v1 and back-suctionconnection11'?. The cas'- ing 1 is provided withan extended portion l`t which serves as an air inlet to vthe 'carburetor." Mounted on. the" lower side of this portion-1,t isa Ispider member 1 which is portion 1l is a yvalve stem 4 thus forming a v support for the valve which functions to prevent its fluctuating or vibrating with the movement of the air into vthe'carburetor. f'

'1`1 e valve seating portion: ofthe valve 4 is provided with a thin edge which is'ad'apted ,j

tov move up and down over 'the slot 1 as the air passes intoy the carburetorv and the valve is :actuated by the vacuum caused by the throttle' of 'the' carburetor: 'This 'valve is also provided-with a spring engages the inwardly extended end of the adjustingl screw 6 Whichprovides for adjusting the valve 4. .Mounted arou ydlthe cup portion la of the casin 1 isthe fuel bowl 2 sometimes termed the oat chamber. Supported in a downwardly extended portion "51 of the casing l and mounted in this-down wardly extended portionis a needle valve I which is adapted to regulate the Howof fuel from said bowl through the inlet nozzle 1".'VV

'tle'` valve and the intake manifold of the en- "ginexis a conductor 9a which is provided Iwith a valve 9b therein and communicating therewith is the conductor9 which eX- tends to the bottom of the bowl la and is ladapted to drain the bottom of this bowl of surplus fuel therein caused by condensation with the varyingopenings of the throttle and the needle valve 9 regulates the opening in said conductor 9. Communicating with this conductor 9a is another conductor l0 which extends downwardlyk and communicates withvthe lower side of the in terior of the fuel bowl 2 and is for the purpose of providing fuel to the engine from the carburetor bowl in small quantities for low speed. Mounted on the sidey of the carburetor is a conductor 1la connectingthe interior of the fuel bowl with the interior of the casing l and it is provided with a needlevalve 1l for regulating the opening through said conductor. This valve and 'conductoris for the purpose of regulating and tending toward equaliz'ing the vacuum in the casing and float chamber when run ning at low speed. v

Though I "have shown and described a particular construction, combination and arrangement of parts and portions and a cer- .tain method of controlling the relative vacua between the carbureting chamber and the :constant level chamber I do not wish to be limited to this particular construction, com-A --bination and arrangement vherein described ibut desire to include in the purview of my :invention the construction, combination and arrangement substantially as set forth in fthe appended claims.

" It 1s obvious that with this-construction itherefisyprolvided la means for taking the fuel from; a; fuel: tank although considerably be low' the carburetor and conductingit di rectly to thel'car'buretor bowl and for mixresaca? ing this fuel with air in proper regulated quantities and conducting it to the cylinder of the engine; that no eXtra vacuum sys- -tem or mechanism is required; that the carburetor is so constructed that the liow of fuel to' the bowl. is in proportion to the vacuum in the bowl which is regulated in the proper ratio with the air passing through 'the carburetor; that the relative variation inthe vacuum existing in the main air passage and in the float chamber varies the in the relative vacuums between that maintained in the fuel supply bowl and that maintained in the main air supply passage of the carburetor and that as the throttle is opened the vacuum in the main casing is slightly increased thus opening the air valve and decreasing the vacuum maintained in the float chamber by means of the air valve exposing a part of the slot le to the atmospheric pressure w`1ich in turn allows more gasoline to pass through the spray nozzle 1c to be mixed with a larger volume of air passing through the main casing.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is: v

y1. In a carburetor, the combination of a carburetingchamber having an air inletand a mixture outlet,- an anterior air valve controlling saidair inlet, a throttle valve controlling said mix-ture outlet, a constant level fuel chamber, means` adapted to transmit suction from said carbureting chamber to said constant level chamber, and a port mechanically controlled by the movement of said air valve and arranged to be alternately connected thereby to the atmosphere or to the suction of said'carbureting chamber for controlling the admission of air to said constant level chamber.

2. In a carburetor, the combination of a carbureting chamber having an air inlet and a mixture outlet, an air valve controlling said air inlet, a constant level fuel chamber,

a fuel inlet to said carbureting chamber fed from said constant level chamber and a port communicating with said constant level chamber and cooperating with said air valve,

said port being arranged whereby the move? ment of said air valve differentially exposes varying areas of said port to the suction posterior to said air valve and to the-atmosphere anterior to said air valve. u

In a carburetor, thecombinatio'n of air passageway, an automatic air valveeo'nitrolling the inlet to said air passagewa'yya throttle controlling the outlet, an iiitermeL diate valve between said air valvef'nd's'aid throttle,l a fuel supply chamber,`a`.fuellinlt fed from said fuel supply chamber an; "i

charging' into said air passageway, and a passageway communicating with said fuel `chamber above the fuel level therein and having ports communicating with said air passageway between said automatic air valve and said intermediate valve, and between said intermediate valve and said throttle.

4. In a carburetor, the combination of an air passageway having-an inlet and an outlet, an automatically operating air valve controlling said inlet, a throttle controlling said outlet, an intermediate valve,aconstantlevel fuel supply chamber, a fuel inlet fed from said supply chamber andwdischarging into.

said air passageway at a point between said intermediate valve and said throttle, a passageway yextending from said fuelv supply chamber and opening into said air passageway between said automatic air valve and said intermediate valve, and a passageway extendingy from said supply chamber and opening into said air passageway between said intermediate valve and throttle.

5. In a carburetor, the combination of a carbureting chamber having an airinlet and a mixture outlet, an automatically operating air valve controlling said air inlet, a throttle controlling said outlet, a manually operatedvv intermediate valve in s'aid carbureting chamfuel inlet from said fuel supply chamber to said carbureting chamber,a throttle valve controlling the mixture outlet, an air valve for controlling the air inlet, a passageway from said fuel supply chamber to said carbureting chamber, an intermediate valve in said `carbureting chamber positioned to control the effect of the suction in said carbureting chamber on said passageway, saidair valve being adapted in its opening movement to move along the entrance of said passagewa to act as a valve forsaid passageway to di erentially proportion the suction effect in said passageway and airflow thereto when said intermediate valve is open.

7. In a carburetor, the combination of a carbureting'chamber having an air inlet and a mixture outlet, a fuel supply chamber, a fuel inlet from said supply chamber to said carbureting chamber, a throttle valve' con-r trolling said mixture outlet, an automatic valve controlling the air inlet, a passageway extending from said carbureting chamber to said fuel supply chamber above the level .of fuel therein, an intermediate valve in said carbure-ting chamber operable to control the effect of the, suction in said carbureting chamber on said passageway and said automatic valve, said intermediate valve when closed disconnecting said passageway and said automatic valve from the suction elfect in said carbureting chamber and when open exposing said passageway and said automatic valve to the suction ei'ect whereby said automatic valve will be operated, said' automatic valve when in operation cooperating with said passageway to differentially expose said passageway to the suction eect and to air flow. i

In testimony whereof, I have hereunto set my hand at San Diego, California, this 16th day 0f April, 1920.

i NOBLE ECKLES.

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