US1044594A - Carbureter. - Google Patents

Description

C. M. STROUD. CARBURETER.

APPLIUATION FILED Juan, 1910.

iygo Patented Nov. 19, i912.

. @www l CHARLES IMI.- BTBOUD, 0F MINNEAPOLIS, MININEBOTA CABBUBETEB.

` Specification of Letters Patent.

Patented Nov. 19, 1912..

Application lcd January 17, 1910. Serial No. 538,484.

To all whom it ma/y concern:

Be it mown that l, CHARLES M. STnoUn, of Minneapolis, Hennepin county, Minnesota, have invented-certain new and useful Improvements in Carbureterxaof which the following is a specilication. My invention relates to carbureters and particularly a self-priming one. ln carbureters as usualiy constructed, it is necessary, particularly in cold weather, to operate the valve by hand to feed some gasolene into the mixing chamber for the purpose of priming it. Sometimes it is necessa vto drop gasolene into the cylinder or cylinders before the engine can be started.

'lhe object of my present invention 1s to maintain, while the engine is at rest, a pool of gasolene in the vaporizing chamber to the end that the engine can be easily and quickly started,

A further ob'ect is' to provide a construction which will permit air to be drawn in from all sides and thoroughly mixed with the gasolene preparatory to entering the engine cylinder.

The invention consists generally in a carbureting vaporizing chamber having means for retaining a pool of oil therein contiguous to the air inletv ports.

Further the invention consists in providing a series of air inlet ports around the vaporizing chamber.

In the accompanying drawings forming part of this specification, Figure 1 is a vertical sectional view of a carburetenembodying my invention, Fig. 2 is a horizontal sectional view on the line of Fig. 1, Fig. 3 is a side elevation, Fig. 4 is a modified construction illustrating the air inlet ports arran ed tangentially with respect to the axis ont tie vaporizing chamber.

ln the drawing, 2 represents an. oil reservoir having a supply opening 3 and a oati controlling a valve 5 1n the usual way.

6 is an oil passage leading fromthe reservoir and '7 is a port communicating with said passage and with the vaporizing cham- Y ber 8. ln the bottom of this chamber-,is a

depression 9 wherein a pool of the oil'may collect upon entering the chamber through the port 7, the oil inthe pool being maintained on a level with the oil in the reservoir? A needle valve 10 controls the en-l trance of oil from the passage 6 into the vaporizin chamber. This valve is adjusted to admit t e desired amount of oil from the reservoir, the adjustment being varied according to the temperature, as usual in devices of this kind. An annular wall l1 incloses the vaporizing chamber and has a .series of radial air passages 12 therein leadmg from the open a1r into said chamber, and within said chamber and depending below said air passages and preferably to a point within the oil in the pool or contiguous thereto is a fla e 13 inclosin a passage 14 through which t e mixture ows to a passage 15 leading to the cylinder. This -passage 15 is provided with the usual valve 16 and opposite this valve an auxiliary air in take valve 17 is preferably provided. A pipe 18 is connected with the cylinder in the usual way and when the engine is in operation, a suction will be established through the passages 14 and l5 and currents of air will be drawn in through the passages l2. These currents of air, entering the annular passage, formed between the flange 13 and the Wall of the va orizing chamber, will flow downwardly t erein and, contacting with the pool of oil, will be thoroughly carbureted. If the lower edge of the flange is out of contact with the oil in the pool, then the air will flow over the surface of the oil,

but if the lower edge of the flange is immersed in the oil, then the currents of air will pass down through the oil and under the flange, emerging in the passage 14. As fast as the oil in the pool is taken u a fresh supply will enter through the port and in practice I have found that the vaporization isn so rapid that the supply in the pool will be gathered up engine and w1ll only accumulate when the engine is at rest. When the engine stops, a pool of the oil will collect in the bottom of the vaporizing chamber and be presentcontiguous to the air passages'for immediate vaporization as soon as the engine is started. N o time is, therefore, required for priming or introducing oil to the cylinders.

The location of the series of passages` around the chamber insures the entrance of a large volume of air to the vaporizing chamber and an abundant supply of the mixture to the enginef The introduction of air from all sides of the vaporizing chamber insures a more thorough mixture than @would be possible with air inlet ports as usuall; arranged. The iiange coperatingwllo with t e walls of the chamber forms a duct, usually annular, extending around the chaminstantly uponl starting the ullo:

' ing currents ture of the oil and ber and communicating with the air intake openings, the walls of the duct serving to direct the currents of air' downwardly into contact with the pool of oil in the bottom of the chamber.

In Fig. 4 I have illustrated a modified construction, which consists in provldmg air passages 2O tangentially arranged with respect to the axis of the vaporlzmg chamber. The operation, however, stantially the same as described, the currents of air ent'ering the passages, strikin the wall of the flange 14 and bemgdeflecte downwardly thereby into the pool of oil beneath. l

I do not, in this application, wish to be confined to the specific arrangement or construction oflparts shown herein, as I am aware that the vaporizing chamber and the air inlet ports may be modified in variousv ways and still be within the scope of my invention.

I claim as my invention: 1. A carbureter comprising a casing hava vaporizing chamber and an oil reser- 1n Voir provided with an overflow opening communicating with said'chamber, the iioor of said chamber being adapted to receive the overiow from said opening and form a shallow pool of oil suiiicient for the initial charge of the engine, the central portion of said chamber above said iioor being open and unobstructed, the outer, upper walls oi said chamber having a series of air intake openings extending at intervals around said chamber, said walls also having a circumerential duct communicating with said openings and operating to direct the incomof air downwardl into the oil on said'iioor, the currents o air iowing downwardly from all sides and being deflected inwardly and upwardly by the lower walls of said chamber, and meeting in the central unobstructed portion of said chamber, whereby a uniform and thorough mixair will be obtained.

2. A carbureter comfrising a casing having a vaporizing cham er and an oil reservoir provided with an overflow opening communicating with said chamber centrally through the bottom or floor thereof, a valve for said overiiow opening, the floor around said valve being adapted to contain a shallow pool of oil suliicient for the initial charge of the engine, said iioor being normally dry when the engine is in operation, said vaporizing chamber having a series of air intake openings in its upper walls extending around said chamber, the middle portion of said chamber being open and will be sub- Y inwardly intake opemngs in obstructed, a flange depending within said chamber near its outer walls and spaced therefrom and forming with said outer walls a narrow circumferential duct communlcating vat its. upper endwith said air inlet openings, the lower end of said duct leadin into said chamber near the door thereof and directing the currents of air into the ool of oil, the lower walls of said chamer delecting the air currents upwardly and inwardly, said currents meet-ing in the central' portion of said chamber and flowing from all sides of said chamber, whereby a uniform mixture will be obtained.

3. A carbureter comprising a casing having a vaporizing chamber and an oil reservoir provided with an overiow opening communicating with said chamber, the overiiow from said opening accumulating on the floor of said chamber when the engine. is at rest and forming a pool suicient for the initial charge of the engine, the vaporization being suiiiciently rapid when the-enginev is at work to prevent accumulation of the oil on the floor of said chamber, said chamber having a series of circumferential. air its upper walls and a {iange depending within said chamber to a point near the floor thereof, and spaced from the walls of said chamber and forming ytherewith a narrow duct which communicates at its upper end with said airintake openings, t flange directing the air currents downwardly into 'the pool o.oil and deflecting them inwardly and upwardly, saidV air currents entering said chamber from all sides thereof, whereby a uniform mixture will be 4. A carbureter comprising a casing having a vaporizing chamber therein provided with a bottom adapted to contain a shallow Apool or film of oil and communicating with a source of oil supply, the walls of said casing having a series of air intakepassages tangentially arranged with respect to said walls, said chamber having a circumferential duct communicating with said passages, tlie walls of said duct directing the air currents downwardly into the pool of oil in the bottom of said chamber whereby said air currents will be uniformly and thoroughly carbureted.

In .witness whereof I have hereunto my hand this 11" day of J an. 1910.

CHARLES M. STROUD.

Witnesses:

L. C. CBONEN, A. M. W'ALs'rnoM.

set

he walls of said chamber and said

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