US994886A - Generator-valve for gasolene-engines. - Google Patents

Description

F. L. SWANBBRG.

GENERATOR VALVE FOR GASOLENE ENGINES.

APPLICATION FILED DEO. 27, 1907.

` Patented June 13, 1911.

srATEs ATENT OFFICE.

FLOYD L. SWANBERG, OF CINCINNATI, OHIO, ASSIGNOR TO THE D. T. WILLIAMS VALVE COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

GENERATOR-VALVE FOR GASOLENE-ENGINES.

Specification of Letters Patent. Patented June 13, 1911.

Application led December 27, 19C?. Serial No. 408,236.

To all whom it may concern:

Be it known that LFLOYD L. SWANBERG, a citizen of the United States, residing in Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Generator- Valves for Gasolene-Engines, of which Athe following is a full, clear, and exact description, reference being' had to the accompanying drawings, forming part of this speciication.

My invention relates to generator or mixing valves for gasolene englnes more particularly adapted for use with marine gas engines of the two cycle type, although, of course, so far as the improvements are adapted for supplying the proper mixture of gas and air to any type of engine, my invention is not to be understood as limited to marine engines whether of one type or another.

My improvements consist of the novel construction and arrangement of parts which will be hereinafter particularly pointed out and claimed which embody features of construction whereby the proper mixture of gas apd air may be furnished for either high or ow speeds and in which the liability of leakage of the gasolene when the engine is at rest is overcome.

In the drawings Figure 1 is a central 'vertical section of my improved generator taken at right angles to the-gasolene valve. Fig. 2 is a similar horizontal section of same. Fig. 3 is a central vertical section taken at right angles to the section shown in Fig. 1 'and Fig. l is a vertical section taken through the throttle valve. Fig. 5 is a horizontal section taken on lines 5--5 of Fig. 3.

1 is a cylindrical metal casing forming the mixing chamber 2, and provided with an inlet pipe`3, secured in the base, gasolene inlet pipe 4, secured at one side, and the eduction port 5, for the mixture from the mixing chamber 2, tothe engine cylinder.

6 is the air inlet valve comprisin a disk 7, having its seat in the base 8, of t e mixing chamber, and provided with a hollow stem 9, which is ided in the socket 10 of the'bushing 11, epending from the screw threaded cap 12, which closes the upper end of the mixing chamber.

The gasolene is supplied through ipe 4, through the inlet port 13, which is ormed in' a tubular casing 15, which vextends across the air'inlet port below the seat of the `air lnlet valve, and the supply of gasolene is controlled by the needle valve 14, provided with screwthreaded stem 16, and knurled head 17, the valve being held in set position by the spring plate 18, secured by a nut 19, while20 is the packing with stuffing box cap 21, for the valve stem. A passage 22, for the gasolene is drilled into the needle valve openlng and leads vertically upward under the air inlet valve 6. This passage is closed by "the needle' check valve 23, which is provided with a stem 24, which is loosely guided in the hollow socket of the Valve stem 9, of the air valve. This needle. valve stem 24, is provided with a head 25, which slides loosely in the socket 10, of the bushing 11, and the valve is kept on its seat by the lightcoiled spring 26, interposed between the head 25, and the base of the socket.

' 27 is a screw threaded adjusting rod, with milled head 28, which rod extends down in to the socket 10 around the coiled spring 26, and by advancin or retracting this rod the lift of the chec valves is adjusted as desired. 35 is the packing and 36 the gland forming a stuffing box for this adjusting rod. The length of the needle valve 23, with its stem is such that when the air valve 6 and needle valve 23, are both seated, a space 29 is left between the head 25, and the upper end of the stem 9, so that as the air valve is opened by the engine suction the gasolene check valve will retain its seat momentarily unt-il the head 25, is lifted by the air valve stem.

I find that this construction enables me to furnish a much more perfect mixture of air and gasolene than is possible with the ordinary generator valve constructions in which the gasolene-inlet is usually drilled into the air valve seat. In the older constructions the air valve also forms the gasolene valve and the gasolene enters with the air. Better results are obtained I havev discovered when' 'the air valve opens momentarily ahead of the gasolene port. ln addition tothis `in such constructions the gasolenel enters at the side of the air inlet, so that there is` much less suction on the gasolene than there is in my construction in which. the gasolene is delivered centrally of the air inlet. By the introduction of the gasolene into the center -of the current of inrushing air a more perfeet mixture of the two gases is obtained. Moreover with my construction there is no liability of leakage of gasolene when the engine is at rest. Heretofore any failure of the air valve to seat itself tightly, either from wear of the valve or dirt on the seat, or from any other cause, has resulted in a leakage of gasolene, and the gasolene supply has had to be cutoff to insure against leakage. This shutting off of the gasolene supply is very disadvantageous, for when the gasolene needle valve has been adjusted by experiment to furnish the proper amount of gasolene required for a perfect mixture under any existing conditions of atmosphere or temperature, any further manipulation of the gasolene valve destroys at once the proper adjustment, which can only be again determined by further experiment.

The supply of the perfect mixture from the mixing chamber 2, to the engine cylinder is fully controlled by the butterfly throttle valve 30, mounted on the stem 3l, with operating handle 32. Mounted on the stem 3l, is the packing 33, with stufiing box cap 34. The stem 27 is also provided with packing 35, held in place by the gland 36. When the proper mixture has been determined by setting the gasolene supply valve, for varying speeds the supply is fully controlled by this throttle valve. In order to hold the stem of this valve in fixed position, and to prevent the jarring of the engine from disturbing its position, I provide a set screw 37, which takes through an elongated boss 38 in the casing, and bears upon a coiled spring 39, interposed between the set screw and the plunger 40.V The plunger is thus held under spring pressure against the stem 31, of the throttle valve, which holds the valve in any position it may be set.

In order to prevent dirt or sediment in the gasolene from passing .into the mixing valve, and to assist in the condensation of i vancing and any water in the gasolene, I provide a gauze screen 4l for the gasolene pipe. This screen is set in a socket in the outer end of the extension of the casing through which the gasolene is introduced and held in place by a suitable washer while 42 is the coupling sleeve screw threaded in the'end of the pipe 4, and 43 the coupling nut, the seat ends of the coupling sleeve and casing being formed with concave and convex surfaces to form a tight joint. In passing through the wire screen 41, any moisture inthe gasolene is condensed `and collects in the chamber 44, whence it runs down intoA the receptacle 45, formed in an enlargementv on the casing below the gasolene inlet, and as the water accumulates it is discharged through the port 46, normally closed by the valve 47.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is:

Ina device of the character specified, a carbureting chamber, a valve for controlling the supply of gasolene thereto, a check valve for the air and a check valve for the gasolene, the air valve provided with a hollow stem to receive and guide the stem of the gasolene check valve, with the inlet for the gasolene centrally of and immediately below the air check valve, the gasolene check valve stem extending beyond the hollow stem of the air valve and having a head in the pathway thereof but normally out of contact therewith whereby the two check valves will be opened in succession, and a coiled spring bearing between the casing and the head of the gasolene valve to hold the same to its seat, with a rod for controlling the lift of the check valves and external means for adretracting said rod.

FLOYD L. SWANBERG. Witnesses:

` FRANK H. KUNKEL,

BEssm A. BEALL.

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