US1156084A - Carbureter. - Google Patents

Description

H. L. KIMMELL.

CARBURETER.

APPLICATION FILED FEB. 20. 1908.

Patented Oct. 12, 1915.

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PATENT @FFCFL HERBERT Il. KIMMELL, OF LOS ANGELES, CALIFORNIA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO W. E. BIANCHI TOMPKINS, OF NEW YORK, N. Y.

' CARBURETER.

Application led February 20, 1908.

To all whom t may conce/m.'

Be it known that I, HERBERT LIKIMMELL, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Carbureter, of which the following is a specification.

This invention relates to carbureters, and the main object of the invention is to provide for furnishing a perfect mixture of gas and air under all conditions of speed and atmosphere, and to ydeliver a substantially uniform amount to each cylinder. The latter feature is of considerable importance for,.as is well known, in a multi-cylinder engine the suction will vary in the different cylinders and when a cylinder having good suction takes its charge from the carbureter, if the latter is of ordinary type, the next cylinder in succession having a weaker suction is unable to get its quota of mixture as the previous cylinder has depleted the supply.

Another object is to eliminate the usual automatic air inlet valve and to provide for positively regulating the size of the air inlet to correspond to the oil inlet or needle valve opening.

Another object is to enable the device to be easily adjusted without removing it from the engine.

Referring to the drawings, Figure 1 is a vertical sectional view through the device, the view being taken on line v1-w1 Fig. 2. Fig- 2 is a plan View. Fig. 3 is a section on line o23-'m3 Fig. 2. Fig. 4 is a section on line 064mm* Fig. 2. Fig. 5 is an end elevation of the air valve.

1 designates a float valve chamber in which is a float valve 2 operating a rock-arm 3 pivoted at 4 and having an arm 5 which engages in a groove 6 in an automatic oil inlet valve 7, the lower end' of which is tapered to co-act with a valve seat 8 formed in a nipple 9 which is screwed into the lower end of the side casing 10 and the nipple has a central bore 11 through which the oil is fed. `The upper end of the valve 7 slides in a plug 12 which is screwed in the upper end of the casing 10. Oil enters through nipple 9l and iows past the valve 7 into the float valve chamber 1 and rises to the level indicated causing the float 2 to Vrise-which moves downvalve 7 aga-inst: valve Specification of Letters Patent.

Patented Get. 12, 1915.

sei-mno. 416,916.

float 2 descends and lifts valve 7, thereby permitting oil to again flow into chamber 1 and replenish the same; thus the float 2 and valve 7 automatically operate to maintain a substantially constant level of oil in the chamber 1. In this connection it should be noted that the closing movement of the valve 7 is downward and the valve 7 is located above the valve seat 8. This gives an unobstructed flow of the oil past the valve seat and dispenses with a stuffing box below the valve seat thereby avoiding leakage. From the chamber 1 the oil flows through a passage 13 to a valve chamber 14 in which is a set valve 15, the lower end of the set valve 15 being screwed in an extension 16 of the chamber 14, a stufling box 17 being employed to prevent leakage. At the upper end of the valve chamber 14 is a valve seat 18 which co-acts with set valve 15 to regulate the passage of oil into the superimposed mixing chamber 19. The set valve 15 is always open and should be adjusted so that a sulicient amount of4 oil will flow by gravity past the valve seat 18 into the mixing chamber 19 to start the engine, but, as will be later explained the set valve 15 does not furnish oil for the regular running of the engine after it has been started, the oil for regular running being admitted through a valve sea-t 20 which is also located at the top of the valve chamber 14. The level of the valve seat 20 is below the level of the valve seat 18 for a purpose to be described.

The valve seat 20 is controlled by a gaso l'ene valve 21 the stem of which is threaded in a sleeve 22, the valve 21 being adjustable inthe sleeve 22 but it does not turn normally therein, being locked in its regulated position in the sleeve by a stufng box 23, the latter serving the double function as stuliing box and locking means. By loosening the stuffing box 23 the gasolene valve 21 may be adjusted by screwing it up or down in the i sleeve 22. The sleeve 22 is provided externally with relatively coarse threads and is screwed into a projection 24 of the casing 25 which incloses they mixingA chamber 19. A slotted rock-arm 26y is provided with a split hub 27 which is clamped to the'sleeve 22 and by operating the rock-arm 26 the sleeve may be turned and at the same time moved longitudinally by its threaded portion thereby imparting a longitudinal movement to the valve 21 causing the valve to advance or recede from its seat 20, according to the direction in which the sleeve is turned.

An intermediate air chamber 28 is located below the mixing chamber 19 and is closed to the atmosphere except by an air inlet opening 29. At its upper end the chamber 28 communicates with the mixing chamber 19. Slidable within the casing 25 which 'forms the mixing chamber is an air valve 30 which comprises a shell having two wide slots 31 and 32 and one narrow slot 33, the slot 32 extending through nearly the entire length of the shell, being formed to maintain constant communication between the mixing chamber 19 and valve seats 18 and 20 and air chamber 28 irrespective of the position in which the shell 30 may be. rlhe slot 33 is formed to give room for the valve 21 and allow full movement for the air valve 30 as the latter extends diametrically through the valve 30. The slot 31 is ex tended back only part way from the top of the shell and when the valve 30 is closed the slot does not fully meet the end wall of the passage 34; and the passage is thus left open for a narrow space, as shown in a, to permit of the passage ot' a limited amount of gas and air therethrough in starting the engine. At this time the oil which enters the mixture chamber enters by gravity past the set valve 15 as the gasolene valve 21 is closed and the air for the mixturc enters through the opening 29 into the air chamber 23 thus entering the mixing chamber .vhere it combines with the oil therein and the mixture enters through the narrow slot in passage 341 into the reservoir chamber 35 which is located above the float valve chamber 1. From the reservoir chamber 35 the mixture enters the induction pipes, not shown, by which it is conducted to thecyiinder or cylinders.

ri liter the engine has been started, the main gasolene valve 21 is raised from its seat 20 to admit more gasolene, and at the same time the air valve 30 is moved to a corresponding extent to admit air to produce the requisite mixture. Gasolene now enters the mixing chamber 19 almost entirely through the seat 20, and only a small amount will enter through the seat 18, although open to the same extent as before. The reason is that suction applied to auid at one end of a conduit is increased or diminished at the other end thereof according as the irst end is greater or less than the second and approximately in the same ratio. Thus, it the area of the annular passage between the conical end of the valve 21 and its conical seat 20 be four times as great at the top as at the bottom, the suction will be increased at the bottom of said passage approximately in the ratio 1 to 1. Conversely, under similar but reversed conditions, the suction at the top of the annular conduit between the valve 15 and its seat 18 will be decreased approxi mately in the proportion t to 1. rThus, although the levels o1 the fluids at the two valve seats are the same and said valves are opened to the same extent, the suction of the engine will be 16 times as effective on the gasolene at the valve seat 20 as at the valve seat 18.

By the above-described arrangement the engine may be started with the main gasolene valve 21 practically closed, so that the engine does not race immediately after starting. Also, since a given volume ot mixture will enter the engine at a fixed position of the throttle, regardless of the momentum ot the engine, the engine will not race when the clutch is released.

A link 36 is adjustably attached by a bolt 36 to slotted arm 26 and the other' end of link 36 passes slidably through a block 37 which is pivoted to an arm 38, the arm 38 being attached to a stem 39, the stem 39 passing through the end ot the mixing chamber casing 25 and being attached to the valve 30. The link 36 has a head 10 which bears against the block 37 and a coil spring i1 is mounted on the other side of the block and is fastened to the link 36 and tends to retract the link 36 to hold its head 10 against block 37, yet it permits the air valve stem 39 to be pushed in, block 3'? sliding until link 36 compresses spring 4:1, after the link 36 has moved the slotted arm 26 into such position that the gasolene valve 21 is closed. Thus. after the gasolene valve has been closed, outward movement ot the valve 30 will not cause a similar outward movement oit link 36 and lifting oit throttle valve 21, until block 3.7 strikes the head l0 of link 36.

The casing 25 is formed with an air inlet opening l12, which is opened by the movement of the valve 30 in the direction corresponding to the opening movement of the valve 21. By adjusting the link 36 on the slotted arm 26, the desired ratio of opening and closing movement between the valve 21 and the opening and closing ofthe air inlet 12, may be secured. A very important feature of my invention resides in the form of this opening 42, by which there is obtained a proper mixture of air and gasolene vapor at whatever rate they are supplied to the engine. So far as l am aware, in all prior forms of carbureters in which an auxiliary air supply is automatically increased with the gasolene supply, the air inlet opening thereof has been increased at the same ratio as the gasolene inlet opening. But by reason of the increased speed of the engine when more gasolene is supplied thereto, not only is the suction greater on the surface of laaaoe the gasolene at the main gasolene valve, but on the surrounding air drawn from the chamber 28, and which is used to spray said gasolene. Hence more gasolene is supplied to the engine than would result merely from the increase size of the gasolene inlet. I provide for this increased gasolene supply by forming the inlet opening 42 triangular, or with divergent sides, as shown, so that a substantially perfect mixture is obtained at all positions of the main gasolene valve. I thus dispense with the use of a spring to oppose the opening of the air valve. Since such springs have to be overcome by the outside atmospheric pressure, they reduce the efective atmospheric pressure by the force of the spring which is required to be overcome. The reduction in the effective pressure causes incompleteness of the filling of the cylinder with mixture, thus correspondingly reducing the effectiveness of the engine.

That I claim is l. In a carbureter,the combination of a float chamber, a float therein, a valve controlled by the ioat for regulating the admission of gasolene to the float chamber, a cylindrical horizontal mixing chamber at one side of the ioat chamber, a gas chamber supported above the ioat chamber and in connection with the mixing chamber, a gasolene passage from the float chamberl to the mixing chamber, means to control the admission of air to the mixing chamber, a sleeve threaded in the casing of the mixing chamber, a gasolene valve to control said passage screwed in said sleeve, an arm clamped to the sleeve to move the same, and a link adjustably attached to said arm, said link being also connected to said air controlling means and permitting limited relative movement of said means and said gasolene valve.

2. In a carbureter, the combination of a vfloat chamber, a float therein, a valve controlled by the float for regulating the admission of gasolene to the float chamber, a cylindrical mixing chamber, supported on one side of the loat chamber and having an air admission port, a gas chamber supported above the float chamber and in communication with the mixing chamber, a gasolene passage from the float chamber to the mixing chamber, an adjustable set valve in said passage for controlling the flow of gasolene therethrough, a second passage from the 'oat chamber to the mixing chamber, a gasolene valve freely movable for varying the flow of gasolene therethrough, a valve for controlling the air admission port, said valve also controlling the flow of mixture to said reservoir, and means connecting the air valve stem to the last named gasolene valve for moving the two simultaneously, said means including a spring to permit relative movement of the valves.

3. In a carbureter, the combination of a cylindrical mixing chamber, a oat chamber at one side of and communicating with the mixing chamber, a gas chamber above and supported on the float chamber, a longitudinally movable sleeve valve to control the admission of carbureted air from the mixing chamber to the gas chamber, an inlet port disposed in the underside of the mixing chamber and a needle valve having its stem extending above the outside of the mixing chamber, the valve cooperating with the inlet port to regulate the admission of gasolene from the float chamber to the mixing chamber, said sleeve valve being slotted longitudinally to straddle the needle valve.

i. In a carbureter, the combination of a mixing chamber having an air inlet port, a longitudinally movable sleevelike air valve disposed within the mixing chamber to control the opening of the air port, a gasolene chamber communicating with the mixing chamber, a needle valve to regulate the admission of gasolene from the gasolene chamber to the mixing chamber, an externally screw threaded sleeve mounted in the shell of the mixing chamber and supporting the needle valve, an arm secured to said screw threaded sleeve, and a link connection be tween said arm and the stem of the sleevelike air valve, said arm being slotted longitudinally to permit the connection of the link to the arm to be moved toward or from the axis of the threaded sleeve.

5. In a carbureter, the combination of a cylindrical mixing chamber having an air inlet port and a gasolene inlet port, a gas chamber integral with the mixing chamber and having a flat underside, a gasolene chamber fitting against the underside of the gas chamber, a conduit to conduct the gasolene from the gasolene chamber to the mixing chamber, a valve to regulate the flow of gasolene to the mixing chamber and a longitudinally movable sleeve valve to regulate the admission of air to the mixing chamber.

6. In a carbureter, the combination of a mixing chamber having a port for the admission of gasolene, a valve to regulate the admission of gasolene to the mixing chamber, an externally threaded sleeve mounted in the wall or" the mixing chamber and supporting the said valve, a sliding air valve in said mixing chamber and having a valve stem extended through the end of the mixing chamber, an arm on said threaded sleeve, an arm on said valve stem and a link pivotally connected to the arm on said sleeve and having a sliding engagement with the arm onv le v 1,156,084

lene leading from the float chamber to the In testimony whereof, I have hereunto set mixing Chamber, and two Valve controlled my hand at Los Angeles, California, this passages at the Outer end of the duct for 13th day of February 1908.

Controlling the flow of gasolene from said HERBERT L. KIMMELL. 5 duct to the mixing chamber, one of Said In presence ofvalves being normally open and having a GEORGE 'I`. I-IACKLEY,

higher Valve seat than the other. FRANK L. A. GRAHAM.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

It is hereby certified that the name of the assignee in Letters Patent No.

1,156,084, granted October 12, 1915, upon the application of Herbert L. Kiminell,

of Los Angeles, California, for an improvement in Oarburetels Was erroneously Written and printed as W. F. Bianchi Tompkins, Whereas said name Should have been Written and printed as Bianchi Tompkins; and that the said` Letters Patent should be read with this correction therein thatl the same may conform to the record of the ease in the Patent Office.

Signed and sealed this 18th day of January, A. D., 1916.

[SEAL] J. T. NEWTON,

Acting Commissioner of Patents. C1. L18--150.3.

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