US1172397A - Carbureter. - Google Patents

Description

CARL F. SCHULZ, OF NEW YORK, N. Y.

CARBURETER.

Specification of Letters Patent.

Patented Feb. 22., 191 6.

Application filed December 14-, 1911. Serial No. 665,619.

To all whom it may concern Be it known that I, CARL F. Souonz, of the city of New-York, in the county of Kings and State of New York, have in- .vented certain new and useful Improvements in Carburetors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and use the same.

This invention relates to carbureters and has for an object to provide a device wherein complete vaporization and mixing may be (affected particularly when heavy oils are use The invention comprises a suction valve having withinit a dash-pot, the liquid of the dash-pot being contained in such a manner that it will not spill with any position of the valve. The liquid preferably employed being of high specific gravity, such as mercury, acts as a weight for closing the valve, and affords a large amount of resistance at every movement toward open posi; tion, whether the movement starts in the closed position of the valve or from any intermediate position up to the limit of the valve movement. Provision is also had for admitting oil, particularly heavy oils, in a thin film over surfaces exposed to heat from a heating jacket. Provision is also made for measuring or regulating the admission of oil by the movement of the air valve.

Thedrawing-illustrates in vertical section the carbureter. I

The suction valve 1, which is, mounted within the mixing chamber 10, has within it a dash-pot, and carries a sleeve 2 which is mounted upon a guiding stem 3 rigidly fixed to the bottom of the casing at ,4. The upper end of the stem 3 is shown carrying a cap or disk 5 to which are secured dependent arms 6 carrying at their lower ends a plate 7, such plate being provided with ports 8. The plate 7' fits snugly against the inner wall of the valve. It will be seen that the parts 3 and 7 as well as their complementary elements, are held in fixed position relatively to the valve 1. The receptacle 9 or cl vniber within the valve and below the plate .7 when this is in its ele vated position is filled with a heavy liquid, such as mercury. glycerin or oil. This operates as a weight to hold the valve 1 to its seat 21. Suction from the engine produces suction within the carbureter or mixing chamber l0, the throttle 12 being open. Such suction lifts the valve 1 from its seat. On the lifting of the valve the liquid in thechamber S) passes through the ports 8 into the space above the plate 7. The initial inertia of theyalve and the fluid otters resistance, so that at whatever position the valve may be, suction will be resisted in moving the valve from its position, thus creating a stronger current through the ports.

The movable member of the dash pot in the illustration is the hollow body or valve casing and the piston member or plate 7 is fixed relatively to the carbureter casing. The support connected to the plate or piston extends outwardly of the hollow body, such body is shown as being provided with a bearing for the piston support located in such position relatively to the inner walls of such hollow body as to prevent leakage of the dash pot liquid therefrom. The sleeve 2 extends inwardly of the hollow body a sufiicient distance that its open end is disposed at all times above the level of the dash pot liquid. In the illustration the sleeve 2 extends a suflicient height above the bottom of the valve casing 1 that with a 'proper amount of liquid in the dash pot no matter what position the carbureter assumes such liquid cannot reach the inner end of the sleeve and escape between the sleeve and the stem 3. This permits a free working fit between the stem and the valve and at the same time constantly maintains the open end of the sleeve which is the inner end of the bearing outof contact with the liquid.

There is shown surrounding theentire mixing chamber, a heat jacket 11, which also extends below the valve seat 21. The valve seat 21 is shown formed at the end of a flange 22 secured in some suitable'manner to the lower portion of the mixing chamber casing. The space within the flange is open to the atmosphere and constitutes an air admission port. The casing is formed with a wall 23 surrounding the flange -The face of such wall is "paced apart from the face of the flange L but approaches the same quite cl! thus forming a fuel vaporizing Chtiii'iiul. also an annular oil in let port which surrounds the valve seat 3,31.

flange and wall upwardly beyond the wall 23.

In some instances,'the fuel, although it is heated therein, is not vaporized in such chamber, which then constitutes a fuel heating chamber. It will be seen that the wall 23 constitutes one of the walls of the heat jacket. so that the influence of the heat jacket will be exerted upon the oil passing in an annular film over the faces of the One of these faces is provided with an annular channel 24 comniunicating with the oil passage 25, to which the oil is admittedby a needle valve 19 from the inlet 36 which is connected With some suitable float chamber in a well known manner.

The needle valve 19 is shown at the lower end of a rod 16 which is in engagement with a lever 14 normally resting upon the upper end of the admission valve. The lever is shown fulcrunicd at 15 and engaging an antifi'iction roll 17 carried by the rod. The rod is normally depressed, and. the valve 19 held to its seat by means of a compression spring 18.

It will be seen that the fuel vaporizing chamber 20 has an annular-port opening into the mixing chamber below the valve seat formed at the upper end of the flange 22. In the drawing the flange 22 extends \Vhen the suction valve 1 is raised from its seat and air is sucked in over its valve seat 21, the vaporized fuel in the chamber 20 is also sucked in, and the inrushing air throws the vapor outwardly and against the heated walls of the mixing chamber, thereby assuring complete vaporization and complete mixture of the vapor and air.

The heated vaporized fuel passing upwardly from the vaporization cha'iiiber 23 will be driven by the inrushing air passing over the valve seat 21 outwardly and against the heated walls of the mixing chamber. This effects a complete vaporization of the fuel and a thorough mixture of the fuel and air.

The strength and duration of the suction determine not only the volume of air admitted past the valve seat 25 but also the distance the suction valve rises from its seat and the length of time it remains unseated. Since the needle valve controlling the supply of fuel to the vaporizing chamber is actuated by the suction valve in its movements, is raised from its seat a greater 'or less distance and is held from the seat a longer or shorter period at each actuation in correspondence with the movement of the suction valve, the fuel supplied to the vaporizjng chamber is thus measured by the suction valve. The proportioning of the supply of fuel to the demands of the suction and to the volume of air admitted to the mixing chamber assures a sufficient supply and also prevents an excessive supply which would overtax the mixing chamber. When a small amount of light fuel is'drawn into the mixing chamber it is completely japorized in the vaporizing chamber," when a large quantity of heavy fuel is drawn in it is only partially vaporized in its passage through the vaporizing chamber. The coin pletion of the vaporization of the fuel and the mixing of the fuel and air is facilitated by the 'inrushing air driving the partly vaporized fuel against the heated walls of the mixing chamber. A copius supply of fuel 'would result in incomplete vaporization,

which is undesirable inall cases and particularly so when heavy oils are employed. The heat acketed vaporizing chamber performs its work to the best advantages when the disposed therein, a stem connected to saidpiston and extending outwardly of such body, such body being provided with a hearing for such stem located in such position relatively to the inner walls thereof as to prevent leakage of liquid therefrom.

In a carburetor, a suction valve comprisinga hollow body adapted to contain liquid, a dash pot piston in such body,

stem carrying the piston and extending-outwardly of the said body, and a sleeve can ried by the bottom of'such body and extending inwardly thereof a. sufficient distance that the open end thereof is above the nor mal surface level of the dash pot liquid in any position of the carbureter.

3. In a carhur ter, the combination with a mixing chamber having an air inlet, of a suction valve for controlling the airinlet a vaporizing chamber opening into the mixing chamber adjacent the air inlet, 9/- fuel conduit leading into said vaporizing chamber, a heat jacket surrounding the mixing chamber and vaporizing chamber and means actuated by the suction valve for measuring the fuel proportionate to the air supply.

t. In a carbureter, the combination with a mixing chamber having an air inlet of a suction valve for controlling the air inlet,

a vaporizing chamber opening into the mixing chamber adjacent the air inlet, a. fuel supply conduit leading into the vaporizing chamber, a valve for said fuel conduit, :1 heat jacket surrounding the mixing chamber (I and the vaporizing chamber, and means actuated by the suction valve for controlling fuel supply conduit leading to the space between said flange and wall and constituting a fuel vaporizing chamber there being an annular port therefrom to the mixing chamber,-and means for applying heat to the fuel in such chamber.

6. A carbureter, having a mixing chamber,

a circular flange constituting an air inlet having its end extending into the mixing chamber and formed asa valve seat, a valve seating thereon, a wall surrounding such flange and ending below the said seat, a fuel supply conduit leading tothe space between sa d flange and wall and constituting a fuel vaporizing chamber there bein an annular port therefrom to the mixin c amber, and a heat jacket surrounding t e said mixing Etamberand the said fuel vaporizing cham- 7. In a carbureter, the combination with a mixing chamber having an air inlet, of a fuel heating chamber having a "port opening into the mixing chamber adjacent the said air inlet. a fuel conduit leadin into said fuel heating chamber, a heat acket surrounding said fuel heating chamber, and means for controlling the flow of fuel through said fuel heating chamber. a

8. ln a carbureter, the combination with a mixing chamber.having .an air inlet, of

a fuel heating chamberhaving'a port open-' ing into the mixing chamber ad acent the' said air inlet, a fuel conduit leading into said fuel heating chamber, a heat jacket surrounding said fuel heating chamber, and movable means for controlling the flow of fuel through said fuel heating chamber.

9. In a carbureter, the combination with a mixing chamber having an air inlet, of a.

fuel heating chamber having a port opening into the mixing chamber adjacent the sai air inlet, a fuel conduit leading into said fuel heating chamber, a heat acket surrounding said fuel heatin chamber, and

adjustable means for contro ling the flow of fuel through said fuel heating chamber.

10. A carbureter, having a mixing chamber, a circular flange constituting an air inlet having its end extending into the mixing chamber and formed as a valve seat,

.a valve seating thereon, a wall surrounding such flange and ending below the said seat, a fuel supply conduit leading to the space between said flan e'and'wali, and means for controlling the ow of fluidthrou b said conduit, and a jacket surrounding t e said wall and flange. t

11. A carbureter having a mixing chamher, a circulating flange constituting an air inlet,'a wall surrounding such flange, a fuel supply conduit leading to the space between the said flange and wall, means for heating the fuel therein, there beinga port from said fuel heating chamber to said mixing chamber, and means for controlling the flow of fluid.

In testimony whereof, Ilhave signed this specification in the presence of tn subscribing witnesses.

CARL F. SCHULZ. Witnesses: t

THOMAS R. 'ARDEN, JOHN F. RYAN.

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