US1371302A - Carbureter - Google Patents

Description

E. D'RAHONOVSKY. CARBURETIR.4

Amlcmou man :un: 2. |919.

1,371,302, y Patented Mar. 15; 19`21.

E'ugene Drahunnvskg d@ www @y M I @1M/GWW y EUGENE DRAHONOVSKY, F MILWAUKEE, WISCONSIN.

CARBURETER.

Specification of Letters Patent. Patented luar, 15, 1921 Application led June 2, 1919. Serial No. 301,148. 1

To all whom it ma concem:

Be it'known that EUGENE DnAHoNovsKY,

f a citizen ofthe United States, and resident of Milwaukee, in the county vof Milwaukee and State of `Wisconsin, have invented new and useful Improvements in Carbureters, of

which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

Iy invention relates to certain'new and useful improvements in carbureters wherein the fuel and air will be thoroughly co-mingled prior to their entrance into the intake manifold, and has for one of its objects to provide a floating valve member operated by the suction created inthe mixing chamber of the carbureter by the engine which will automatically supply air in they properproportions relative to the speed of the engine.

Another4 obj ect of the present invention is to provide a carbureter having means for metering the air and at the Sametime directing it into the venturi to effect a thorough cominglingof the air and fuel.

- A furtherobject of`this invention'is to `provide a carbureter which 'will be of compact construction, eflicient in operation and comparatively inexpensive of production, all things being considered. y

lA` still'- further object of the present in vention is to rovide a carbureter embodying the various eatures herein set forth which will be compact, simple and eflicient in operation. Y

With the above and other objects in viewV which will 'appear as the description proceeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and. more particularly defined by the appended claims, it being understood that such changes inthe precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

In the accompanying drawing, I have illustrated one complete example. of the physical embodiment ofmy invention constructed according to the best mode I have so far devised for. the practical application of the principlesthereof, and in which- The single ligurerepresents a view, part in section and part in elevation of a carbureter embodying my invention.

`Referring now more particularly to the Vaccompanying drawing, 2 designates a body casing providedmedially of its ends/with a laterally extending annular flange 3 for closing the upper end of a float chamber' 4 secured about the lower portion of the body casmg by means of a nut 5 engaging the lower threaded nippled end 6 of the body casing'. The body casing is open throughout tending upwardly into the bodycasing andr terminating in a cup-shaped fuel outlet 13.

' The casting 7 hasV an air inlet 14 provided with a butterfly valve 15 lixed to a j ournaled shaft 16 and adapted to be operated as hereinafter described, and with anv auxiliary air inlet 17 adapted to `be connected with a stove surrounding the intake manifold (not shown), but in the present instance being illustrated as closed by a plate member 18.

Disposed above the body casing 2 is a member 19 which has a sleeve 20 adapted to slip into the upper end of the body casing which is counter-bored to provide a snug fit therewith and is secured to the body casing by means of a flange 21 abutting a flange 22 formed on the body casing, any desired means such as cap screws or the like may be used to secure the body casing 2 and member 19 together. The member 19 has its wall flared upwardly and inwardly to provide a substantially conical shaped mixing chamber 23 communicating with the body casing by means of av valve chamber 24 in which is disposed Va floating valve member 25 to be later described. The member 19 `has its upper end provided with a flange 26 for securement to the intake manifold of an inf ternal combustion engine (not shown), and has journaled in the upper end thereof a rod 27 carrying a butterfly valve 28, the shaft 27 being provided with an operating or throttle arm 29, carrying at its outer end an adjustable leve`r30 adapted to be connectedv Vwith the controlling lever (not` rio with a suitable fuel supply (not shown) and a float member 32 operating acontrol valve (not shown) in said fuel supply for maintaining' the fuel in the float chamber at a constant level, and as before statedthe :fuel

Y passes from the ioat chamber from passageways 11 and then up through outletl12a provided near its outer end withtlie counterbored recess 36. Y

The position of the needlefvalve relative to its seat is 'capable' of fine adjustment by the means to be hereinafter described, and for normally yieldingly urging` the needle valveto the thus adjusted position, I employ an extension springZ- surrounding the portion of. the shank disposed in the recess 36, said` spring having; one end pressing` against :a collar 33 Vand its other end pressing against the outer end of a cap 39 which has its inner end reduced and threaded as at 40 to engage the outer threaded end 41 of .the recess 36, this construction at all times yieldingly urgingY the needle valve 33 inwardly as will be obvious. The cap 39 also serves to secure to the body casinga bracket member 42 provided at one end with a 'pair of spaced ears 43 between whichis disposed andpivoted as at 44 a rockinglever/l5a said lever beingr provided with 'a recess 46 surrounding the shank 34 of the needle valvei and of vdiameter than said shank, and having its end outwardly of said opening threaded as at 47 to receive/an adjusted screw 4Sfhaving` its inner end adapted to abut the end 49 of the bracket 42, and its other end provided with a lrnurled head 507 a locking screw 51 being provided to retain the adjusted screw 48` from accidentally changing' from its adjusted position.

The end Vof the needle valve shank outwardly of the lever 45 is.threaded to receive V aknurled nut 52 having a lriowl-shaped portion 53 adapted to engage the arm about the opening 46 to provide a universal or ball fand' socket jointV connection between vthe lever 45y and the valve shank 34q a locking nut S4-being provided to lock thellrnurled nut 52 in adjusted position, By this construction it will be readily appa-rent that obtain the desired adjustment of the needle valve 33 itis necessaryto merely adjust screw 4S which will govern the space between the needle valve 33 and its seat, and that when the lever 45 is rocked on its pivot to compress spring 37, and move the needle valve out of the passageway 12 for Vsupplying arieh mixture when it is desired to 'start the engine. When it ijs desired to conipletely closethe needlev valve 33, the adjust ing` screw 48 isunscrewed until its inner end is free from the end 49'of the bracket 42 and thenecdle valve willgthen be'urged into engagement with its seat by means of spring` 371,'and the collar 385 which ias its inner surface tapered, will engage the tapered Y Y seat 33 at the inner end of recess 36 and preventthe leakage of fuel thereby.

Loosely journaled on one end of the shaft is a two-erin lever 55 provided on its inner face adjacent shaft 16 with a stud-56, having coiledthereabout one end of a spring 57 .which has its other end coiled about shaft 1G in an opposite direction and then'secured thereto as at 53. When the lever 55 is rocked in aclockwise directionwith referenceto the drawing, the spring' 57V will cause the rod 1G to rotate in a clockwise-direction and thus close the inlet 14 by means of vthe valve 15, and should the lever be moved farther after the valve 15 is in closed positioin the spring 5T will yield to permit this further movement. The means hereinafter described are provided for operating the needle valve against its spring 3'? when the lever 55 is moved after the valve 15 is closed.

rihis means inclu-des an arm 59 which is pivotednear one end at 60 to the end G1 Aef the lever/45 and has itsend remote from its pivot 60 connectedto one arm 32 of the lever 55 by means of a linlr connection 63, and when the lever 55 is rocked 'the arm 59 will be moved on its pivot. Formedv on the endof adjacent its pivot 60 is a projection 64 adapted lto abut the' lever 45 after a ,certain limit ofm'ovement of said arm and if theel-m59 is moved beyond this limit of movementfit then .forms a rigid part of lever 45 by means ofthe projection E, ng saidleverA andthis'roclrs the on its pivot 44 to move the needle valve hereinbefoi'e described. Leadingfrom the arm 62 of the lever 55is a control wire or other means (35 adapted to be con# nected to the dashl board and leading from the other arm 62of the lever 55Vi's a control wireb adapted to be passed outwardly of Vthe radiator so that the butteriiy valve V15 and the needle 34 may be operated either frornthe drivers seat or froml the foivvariil end of the machine.

` l?,eferrinzi;` Vnow moi'e particularly to the novel forni of air controlled. valve which l iso up the opening surrounding the outlet 13 is sufficient to accomodate the volume of air necessary to complete the proper mixture and so I provide a plurality of spaced apertures 69 in the flange 67 to supply this increased'amount of air.

The valve 25 governs or controls the air passageways69 and is of ring shape and is annularly grooved as at 70, whereby its walls 71 defining said groove will close the aperture69 when the valve 25 is inoperative. As the engines speed is increased the suction created thereby in the mixing chamber 23 is proportionately increased and will consequently raise valve 25, permitting air in proportionate amount to ypass through the apertures 69 andthe air passing through the apertures will press against the top closed wall of the groove 70 and be then cirected downwardly into the Venturi tube a short distance and engage with the fuel and air passing upwardly therethrough. The fuel and air then pass through the central passageway in the valve 25 into the mixing chamber 23 which by reason of its shape, imparts to the air and fuel vapors a whirling or eddying motion, thus insuring the thorough co-mingling of the fuel and air.-

In Vorder to insure the instant return of valve 25 to its position closing apertures 69 when the engines speed is reduced, I provide in the top wall of the valve three or four pin openings 72 which while sufficient to allow the'valve 25 to drop to its inoperative position, it will be insuflicient to allow air in any volume to pass therethroughV when v the engine 1s runningv at low speed. AThe upper movement of valve 25 is restricted or limited by means of the annular shoulder 73 `formed in the member 19 and as will be obvious, the adjustment of the volume of air 'supplied at the various engine speeds is governed by inserting in the valve chamber 25, valves of various weights which will be best adapted to the particular engine with which thev carburetor will be used.

' From the foregoing description taken in connection with the accompanying drawing, it will be readily apparent that I have designed a carburetor which will be practical for the purposes described.

lVhat I claim as my invention is:

1. A carburetor for interna-l combustion engines comprising a body casing, a mixing chamber disposedabove the body casing, a fuel inlet within the body casing, a Venturi tube having its upper end laterally flanged and secured to the wall of the body casing adjacent the mixing chamber and its lower end surrounding the fuel inlet, the flange of said Venturirtube being apertured, and an annularly channeled sleeve disposed above the Venturi tube for controlling the passage of airthrough the apertured lange of the Venturi tube, said sleeve deflecting the air passing through the apertured'flange into the Venturi tube whereby the thorough comingling of the air and fuel is obtained.

2. A carbureter for internal combustion engines comprising a body casing, a fuel inlet, a Venturi tube disposed over the fuel inlet, air passageways surrounding the Venturi tube, and an annularly channeled ring of substantially inverted U-shape in cross seetion slidably mounted above the Venturi tube for controlling the passage of air from said passageways, said ring being controlled by the suction caused in the mixing chamber by the internal combustion engine and deflecting the air passing from said passageways into the mouth of the Venturi tube to be comingled with the fuel'passing up wardly therethrough.

A carbureter for internal combustion engines, comprising a body casing, a mixing chamber disposed above the body casing and having its wall restricted toward its upper end, a valve chamber intermediate the body casing and the mixing chamber, a Venturi tube extending into the body casing from the valve chamber, air passageways surrounding the Venturi tube and communicating with the valve chamber, and a sleeved valve of inverted U-shape in cross section for controlling said passageways, said valve being controlled by suction created in the mixing chamber and having small apertures inv its top wall to permit its drop by gravity when the suction in the mixing chamber decreases.

d. A carbureter for internal combustion engines, comprising a body casing, a mixing chamber, a valve chamber intermediate the body casing and the mixing chamber and provided with an inner peripheral wall of the same diameter throughout a Venturi Vtube having its upper end flanged and secured adjacent the bottom of the valve chamber to the body casing wall and its lower end spaced about the fuel inlet, said upper flanged end being provided with a plurality of spaced apertures providing air passageways, an annularly groovcd valve sleeve slidably mounted in the valve charnber and adapted to control the air passageways and deflect the air passing therethrough into the Venturi tube, means limiting the urnvard movement of the valve, and means permitting the ready return of the valve to its position closing the air passageways.

In testimony whereof, I my signature.

EUGENE DRAHONOVSKY.

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