US1518061A - Carburetor valve - Google Patents

Description

c., 2, 1924. 151mm E. B. @BBF-CRD ET AL CARBURETOR VALVE Eile@ Dec. 2o, 1920 Patented Dec. 2, 1924.

STATES EDWARD'B. GIBFORD AND CHARLE'SWALKER GIBFORD, or ADRIAN, MICHIGAN.

CARBURETOR vALvE.

Application led December 20, 1920. Serial No. 431,889.

To all 'whom t may concern:

Be it known that we, EDa/'ARD B. G-Inronn and CHARLES 7. GIBFORD, citizens of the United States of America., residing at Adrian, in the county of Lenawee and State of Michigan, have invented certain new and useful Improvements in Carburetor Valves, of which the following is a specification, reference being had therein to the accompany ing drawings.

This invention relates to carburetors and has among its objects to provide means for more effectively commingling the liquid fuel with theair, to so construct and arrange the mixing chamber that the air upon entering the mixing chamber will be deflected so as to thoroughly commingling with the liquid fuel; to so construct and arrange the parts that in the manufacture of the carburetor the necessity of coring is avoided, the mixing chamber being preferably divided so as to facilitate the manufacture and assembly and to permit of ready access to the various working parts; and in general to provide a. new and improved construction of the character above referred to. The invention further resides iu various features and in such combinations and arrangements of parts as will more fully hereinafter appear.

In the drawings:

Figure 1 is a perspective view of the carburetor with the cap of the float chamber and one sect-ion of the mixing chamber removed;

Figures 2 and-3 are perspective views of the cap and removable mixing chamber section respectively;

Figure 4 is a central cross-section through Figure 3;

Describing 'in detail the particular embodiment of my invention shown in the drawings, l designates the carburetor which comprises a float chamber 2 and a mixing chamber These chambers are preferably cast integral with a connecting web portion 4. The'latter has a horizontal passageway 5 leading from theinside of the float chainher to a vertical passageway (i. 'At its lower end the passageway 6 is provided withL aI suitable drain or pet-cock 7, while at its upper endits communicates with the mixing chamber 3 through a port 8. This port is controlled by metering pin 9 which extends threes-.l1 the erre-e sie@ the @sans and..

through the bushing lO threadedly engaging y and extending through the casing.`

Suitable means are provided `for feeding the liquid fuel from the float chamber 2 tothe mixing chamber 3 through the port `8. In the particular construction shown, Ythe feeding is controlled by maintaining` 'a which has a slotted portion surrounding the stem 23 and adapted to yieldably engage in one of a` series of annular grooves 27 in the stem, -the clip being secured to the float 22. The cap 25 is removably held upon the float chamber 2 by a spring 28 pivoted to the wall of the mixing chamber.

After passing through the port 8 the fuel is commingled with the air in the mixingl chamber 3, the particular construction and operation of which chamber forms an important feature of my invention. In detail the chamber comprises a central cylindrical portion 29 and inclined walls 3() and 31 arranged upon opposite sides of the cylindrical portion. 'Io facilitate the manufacture, the inclined wall 31 is preferably formed on thev removable section or cap member 32 secured to the cylindrical section by screws or other securing means .passing through co-operating lugs 33. The valve 34 controlling admission of air to the mixing chamber is carried by the removable cap member 32, while the port 8 through which the gasoline or other liquid fuel enters, tends transversely through the side wall of the cylindrical portion 29 and substantially at the center thereof. The valre Si is in the form of a poppet valve normally .held to its seat 35 by a spring 36. rlhe arrangement is such that whenever there is suction. placed upon the discharge passageway of the carburetor, leading to the intake manifold, the valve B4 will be drawn away from its seat and air admitted to mix with the liquid fuel drawn through the port 8. Owing to the position of the valve, Yand the novel arrangement 0f the inclined Wells 30, and .al the air lie entering around the periphery ot the valve will be deliected at various times by the inclined walls and the cylindrical wall so as to produce eddies. The employment otl the enlarged mixing chamber having the walls arranged substantially as shown in the drawings assures the desired .mixture in the chamber. A further ieatu re oli the invention resides in making the upper end ot the port 8 cup-shaped to insure a supply ot the liquid fuel, particularly in starting.

For adjustably controlling the amount of air fed around the periphery of the valve 34, means for varying the amount of opening oi this valve away trom its seat is provided. In detail, the stem 37 ot the valve extends through the guide way 38 formed by a bushing threadedly engaging the hub of the spider 39 upon the cap member' 32. The `free end of the stem has a threaded engagement with the outer apertured end of a cap 40 within which is the spring 36 coiled around the stem and abutting the washer Lil. l2 is a lock nut threadedv upon the outer end of the stem for maintaining the cap in adjusted position. Rotation oiD the valve stem 37 is prevented when rotating the cap 40 and lock nut ll by means ot the pin 43 eXtending through the stem and slidably engaging at its opposite ends the longitudinal slots La in the guideway 3S.

In addition to the adjusting means above described, for controlling the amount of opening of the air valve 34e there is a rockable member 45 which is pivoted at L6 upon the cap member 32 and slotted at t7 to. receive the valve stem. rlhis slotted portion is elongated and thickened towards one end so as to provide an inclined surface 48 riding between the flange i9 at the outer end of the guide way 38 and the abutment washer Lll. Normally this rockable member is positioned so that its thinnest portion is between the llange 49 and the abutment washerI Lil but whenever the operator wishes to temporarily restrict the amount of opening of the valve it is only necessary to rock the member 45 about its pivot thus decreasing` the distance between the abutment washer 45 and the cap 40, the ports being so arranged that at the end of this rocking movement there is no Vplay between the abutment washer and cap and consequently the valve cannot leave its seat.

ln order to secure bettereoinmingling of the air with the liquid fuel and to permit ot a limited amount of air entering the mining chamber of the carburetor under certain conditions, as when the engine is ruiming idle, the Vvalve 34 is termed of two parallel spaced discs 50 and 5l, the outer one of which, 5l, is adapted to engage the seat 35 while the inner one 50, has its periphery slightly spaced :trom the inclined wall 3l when the other is seated. The outer disk 5l has the axial aperture 52 therethrough and the valve stem 37 is hollow, whereby air can be drawn through the valve stem and outer disk and pass into the mixing chamber around the periphery of the inner disk when the outer disk is held to its seat by the rockable member 45. lith this arrangement the strength of the coil spring 36 is not excessive so that it will properly i'unction when the valve is released from its seat.

To prevent any air entering the mixing chamberj tor instance, when the engine is being started, l have provided the closure 53 secured to the rockable member 45 and adapted to close the outer open end of the valve stem 37 when the latter is swung to the limit of its travel in the closing direction to maintain the valve seated.

From the above description it will be apparent that the admission of air to the mining chamber is controlled by adjusting either the rockable member i5 or by adjusting Vthe cap l0 and lock nut itl.

The construction as an entity is one in which very accurate adjustment can be made and the parts are so arranged that all portions ot the carburetor are readily accessible either for repair or adjustment. Moreover, the novel construction of the mixing chamber not only secures a better mixture of the fuel and air but also permits the more economical manufacture yand assembly of the parts owing to the meeting edges of the removable section and the main section lying in substantially the plane of one edge of the cylindrical portion. It will be understood that suitable gaskets are employed where they are necessary and that various changes in details of construction and arrangements of parts can be made within the scope oit' the appended claims.

That we claim as our invention is:

l. ln a carburetor, the combination with an air inlet passage, ot a valve controlling said passage, a stem for said valve, a tap upon said stem, a coil spring within said cap and engaging its outer end, and a wedge-shaped member movable transversely of said stem and supporting the inner end ot said spring.

2. lin a earliuretor, the combination iviti an air ii iet passes ot a valve com-rollin.` said p age, a stein 'lor said valve,r a Pdeway for said stem permit L nal movement thereof, a cap tlneadedly enm gaging the outer end o.|z said stem, a washer sleeved upon said stem at the inner end of said cap, a coil spring surrounding said stem and abutting said washer and the'ouler end of said cap and a Wedge-shaped inem-- ber engaging the inner side of said washer.

3. In a carburetor, the combination with an air inlet passa-ge, ot a combined detlector and valve controlling said passage comprising spaced parallel disks the outer disk only lll) CRU

being adapted to close said passage, a hollow stem for said valve communicating with the space between said disks and having a normally open outer end, and means for yieldably maintaining said outer disk in engagement with its seat.

il. In a carburetor, the combination with an air inlet passage, of a combined deflector and valve controlling said passage and comprising spaced parallel disks, the outer of said disks only being adapted to close said passage, a hollow stem for said valve communicating with the space between said disks and having a normally open outer end, means for positively closing said valve and means for closing the outer open cnd of said valve stein.

5. In a carburetor, the Combination with an air inlet passage, of a valve controlling said passage, comprising spaced inner` and outer disks, the outer disk only of which is adapted to seat, and means permitting of the passage of air through said outer disk into the space between bot-h of said disks.

6. In a carburetor, the combination with an air inlet passage, of a valve controlling said passage including spaced discs, one disc being adapted to seat, and means permitting of the passage of air through the last mentioned disc into the space between both of said discs.

7. In a carburetor, the combination with a mixing chamber having a plurality of air inlet passages, of longitudinally adjustable spring influenced means for controlling the supply of air through one passage, a member for regulating the spring influenced means, and a member mounted on the last mentioned member for controlling the supply of air through the other passage.

S. In a carburetor, the combination with a mixing chamber having an air inlet provided with a valve seat, of a valve for controlling the passage of air through the inlet including a pair of spaced discs, engageable with the seat, one disc having al passage therethrough and a stem provided with a longitudinal passage in communication with the passage aforesaid, and a closure for the passage in the stem.

9. In al carburetor, the combination with a mixing chamber having an air passage leading thereto, of a valve controlling said passage, a stem for the valve, a guide for the stem carried by the chamber, a cap connected to the stem, a washer on the stem, a yieldable member between the washer and cap normally holding the valve closed, and means adjustable between the guide and Washer for varying the movement of the valve.

10. In a carburetor, the combination with. a mixing chamber having an inclined wall forming a valve seat, and an air passage leading to the inclined wall, of a valve including spaced discs engageable with said inclined wall for controlling the flow of air through the passage to the chamber.

11. In a carburetor, the combination with a mixing chamber having an inclined wall forming a valve seat and an air passage leading to the inclined wall, of a valve for controlling the flow of air through the passage to the chamber including inner and outer discs, the. outer disc being adapted to engage the seat when the inner disc is spaced therefrom, the outer disc having a passage therethrough and being spaced from the inner disc whereby air may pass through the outer disc and between the inner disc and seat to said chamber.

12. In a carburetor, the combination with a mixing chamber having an air passage leading thereto, of a valve controlling said passage, a stem for said valve, a guide for the stem, a cap connected to the stem, a washer on the stem, a yieldable member between the washer and cap normally holding the valve closed, and a substantially wedge.

shaped member adjustable between the guide and washer for varying the movement of the valve.

In testimony whereof we aix our signatures.

EDIVARD B. GIBFORD. CHARLES VALKER GIBFORD.-

Images