US981156A - Carbureter. - Google Patents

Description

E. M. BARKER.

CARBURETER.

APPLIOATION FILED JUNE 22, 1909.

981,156. Patented Jan. 10, 1911.

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ERNEST MARRIOTT BARKER, OF ST. LEONARDS-ON-SEA, ENGLAND.

QARBURETER.

Specification of Letters Patent.

Application file d June 22, 1909. Serial No. 503,748.

.To all whom it may concern:

Be it known that I, ERNEST MARnIorr BARKER, M. 13., of \Vinstow'e, Charles Road, St. lieonardson-Sea, in the county of Sussex, England, have invented certain new and useful Improvements in and Relating to Carburetors for Internal-Combu'stion Engines, of which the following is a specification.

This invention has reference to im )rove ments in and relating to carbureters or internal coml'iustionengines and has for its object to provide an improved construction Zthereof, whereby greater economy and efficiency than heretofore in the consumption of the fuel is obtained.

The invention relates particularly to carbureters of the kind in which the combustion air drawn by the motor consists of two portions,iwhereof one gprimary air) is led past the fuel nozzle to orm a rich mixtur; whereas the other portion (secondary air) is led into the mixture to dilute and complete the same.

The characteristic feature of the-invention consists inthe arrangement of a fine hori-; zontal fuel nozzle over and opposite the restricted orifice of a vertical riinary air tube and close to a battle dispose in a concentric secondary air tube or passage, whereby the, secondary air is deflected to form a low pressure zone over said' battle under the suction of the motor, so that, a vertical pencil of primary air meets a fine pencil of petrol at right angles in the said low pressure zone. By this means the pencil of primary air at once atomizes and vaporizes the petrol, and the furtheradvantage is attained that the fuel can be kept at a very low level beneath the nozzle, so that flooding at starting and during running is prevented and this without unduly choking the englne.

The accompanying draw ngs show a carbureter made in accordance with this inven--- tion. Figure 1 is a sectional elevation of the carburetor. Fig. 2 is a plan thereof. Fig. 3, is an elevation of the cap h, and Fig. 4 is a] plan thereof.

The fuel nozzle 11 is supplied by :1 pi )e 1) leading to a supply of spirit or oil. his, pipe extends through a mixing chamber 0 connected to the inlet pipe of the engine, and the nozzle a projects horizontally through a cap h so as to discharge the fuel into the path of a pencil of primary air induced through an air'nozzle e by the suction of the engine. The secondary or diverted air current is induced throu h a flue (Z surrounding the primary air nozz e c and is deflected by a-bail'le f at the top. A plug 9 allows of obtaining access to the fuel nozzle for cleaning or other purpose. The cap h auton'iatically adjusts the quantity of the air admitted by the flue d. It is provided with ports Zr and a flange j whose inner edge is configurate with but slightly larger than the outer edge of the batlle The air supply to the flue (i may be heated in any well-known manner.

In operation, thesuction of the engine causes a flow of secondary air through the air flue (l and a jet of primary air through the air nozzle 6. The baffle f at the upper orifice of the air flue d diverts the air current passing through d and creates a zone of low air pressure over the upper surface of the bafile plate. The jet of air induced ,through the nozzle '0 and the jet of fuel induced through the nozzlea are delivered into the heart of this low pressure zone and meet each other at right an les, with the result that the fuel is perfect y atomized and y'aporized and a very powerful suction created on the fuel, enabling the carburetor to start and work with the fuel at a level considerably below that of the fuel nozzle. The suction on the fuel jet is regulated according to the pressure existing in the low pressure zone. Thus when the supply of combustible mixture from the mixing chamber is throttled for running the engine slowly, the cap it 'rests on the air flue, thereby throttling the inlet the initial supply of fuel will therefore be small, consequent on there being no pronounced low pressure zone above the bafile; when running at high speed the suction of the engine induces a.- greater rush of air through the air flue 4 thereby making the low pressure zone above this baffle more pronounced and also forcing up the cap h, so that more-airis admitted to the mixin r chamber from beneath the flange j and through the ports k. The pressure of the lower pressure zone is thereby reduced and the supply of fuel through'the nozzle is more ra id.

hat I claim is 1; A carburetor comprising in combinations. vertical primary air tube having a restricted outlet, 21 vertlcal secondary air conduit surrounding said rimary air tube, a fine horizontal liquid fiiel nozzle disposed l t i 1 Patented Jan. 10, 1911.

over with its outlet opposite and close to said restricted orifice, and a battle located .at the outlet end of the secondary air conduitnnd immediately below the extremity of the fuel nozzle, whereby to divert the secondaryair current and thereby form a low pressure zone around the impinging point of the jets of primary air and fuel.

Q. A carburetor comprising the combina- -tion of a mixing chamber, a nozzle for supplying the fuel, a flue for conveying secondary air to the mixing chamber, a ballle in the Tair flue, an air nozzle disposed approxima tely at right an les to the fuel nozzle, said air nozzle and uel nozzle being in close proximity to the bafile and juxtaposed and a. cap over the air fiue'adaptedto be moved by the flow of air to vary the opening between s'aicl flue and chamber.

In Witness i vhereof, I have hereunto signed my name in the presence of two subscribing witnesses.

ERNEST MARRIOTT BARKER. Witnesses:

REGINALD EATON ELLIS,

ROBERT MILTON SPEARIOINT.

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